Mercurial > vim
annotate src/regexp.c @ 25754:f1ed9dbb700a
Added tag v8.2.3412 for changeset c50b3eff7a641e6041b305575908d6aaf865639b
author | Bram Moolenaar <Bram@vim.org> |
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date | Tue, 07 Sep 2021 22:45:05 +0200 |
parents | 1e6da8364a02 |
children | 9835f424bef5 |
rev | line source |
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commit https://github.com/vim/vim/commit/edf3f97ae2af024708ebb4ac614227327033ca47
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1 /* vi:set ts=8 sts=4 sw=4 noet: |
7 | 2 * |
3 * Handling of regular expressions: vim_regcomp(), vim_regexec(), vim_regsub() | |
4 */ | |
5 | |
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6 // By default: do not create debugging logs or files related to regular |
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7 // expressions, even when compiling with -DDEBUG. |
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8 // Uncomment the second line to get the regexp debugging. |
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9 #undef DEBUG |
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10 // #define DEBUG |
4444 | 11 |
7 | 12 #include "vim.h" |
13 | |
4444 | 14 #ifdef DEBUG |
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15 // show/save debugging data when BT engine is used |
4444 | 16 # define BT_REGEXP_DUMP |
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17 // save the debugging data to a file instead of displaying it |
4444 | 18 # define BT_REGEXP_LOG |
4460 | 19 # define BT_REGEXP_DEBUG_LOG |
20 # define BT_REGEXP_DEBUG_LOG_NAME "bt_regexp_debug.log" | |
4444 | 21 #endif |
7 | 22 |
23 /* | |
24 * Magic characters have a special meaning, they don't match literally. | |
25 * Magic characters are negative. This separates them from literal characters | |
26 * (possibly multi-byte). Only ASCII characters can be Magic. | |
27 */ | |
28 #define Magic(x) ((int)(x) - 256) | |
29 #define un_Magic(x) ((x) + 256) | |
30 #define is_Magic(x) ((x) < 0) | |
31 | |
32 static int | |
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33 no_Magic(int x) |
7 | 34 { |
35 if (is_Magic(x)) | |
36 return un_Magic(x); | |
37 return x; | |
38 } | |
39 | |
40 static int | |
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41 toggle_Magic(int x) |
7 | 42 { |
43 if (is_Magic(x)) | |
44 return un_Magic(x); | |
45 return Magic(x); | |
46 } | |
47 | |
48 /* | |
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49 * The first byte of the BT regexp internal "program" is actually this magic |
7 | 50 * number; the start node begins in the second byte. It's used to catch the |
51 * most severe mutilation of the program by the caller. | |
52 */ | |
53 | |
54 #define REGMAGIC 0234 | |
55 | |
56 /* | |
57 * Utility definitions. | |
58 */ | |
59 #define UCHARAT(p) ((int)*(char_u *)(p)) | |
60 | |
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61 // Used for an error (down from) vim_regcomp(): give the error message, set |
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62 // rc_did_emsg and return NULL |
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63 #define EMSG_RET_NULL(m) return (emsg((m)), rc_did_emsg = TRUE, (void *)NULL) |
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64 #define IEMSG_RET_NULL(m) return (iemsg((m)), rc_did_emsg = TRUE, (void *)NULL) |
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65 #define EMSG_RET_FAIL(m) return (emsg((m)), rc_did_emsg = TRUE, FAIL) |
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66 #define EMSG2_RET_NULL(m, c) return (semsg((const char *)(m), (c) ? "" : "\\"), rc_did_emsg = TRUE, (void *)NULL) |
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67 #define EMSG3_RET_NULL(m, c, a) return (semsg((const char *)(m), (c) ? "" : "\\", (a)), rc_did_emsg = TRUE, (void *)NULL) |
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68 #define EMSG2_RET_FAIL(m, c) return (semsg((const char *)(m), (c) ? "" : "\\"), rc_did_emsg = TRUE, FAIL) |
4444 | 69 #define EMSG_ONE_RET_NULL EMSG2_RET_NULL(_("E369: invalid item in %s%%[]"), reg_magic == MAGIC_ALL) |
7 | 70 |
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71 |
7 | 72 #define MAX_LIMIT (32767L << 16L) |
73 | |
4444 | 74 static char_u e_missingbracket[] = N_("E769: Missing ] after %s["); |
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75 static char_u e_reverse_range[] = N_("E944: Reverse range in character class"); |
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76 static char_u e_large_class[] = N_("E945: Range too large in character class"); |
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77 #ifdef FEAT_SYN_HL |
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78 static char_u e_z_not_allowed[] = N_("E66: \\z( not allowed here"); |
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79 static char_u e_z1_not_allowed[] = N_("E67: \\z1 - \\z9 not allowed here"); |
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80 #endif |
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81 static char_u e_missing_sb[] = N_("E69: Missing ] after %s%%["); |
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82 static char_u e_empty_sb[] = N_("E70: Empty %s%%[]"); |
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83 static char_u e_recursive[] = N_("E956: Cannot use pattern recursively"); |
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84 |
7 | 85 #define NOT_MULTI 0 |
86 #define MULTI_ONE 1 | |
87 #define MULTI_MULT 2 | |
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88 |
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89 // return values for regmatch() |
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90 #define RA_FAIL 1 // something failed, abort |
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91 #define RA_CONT 2 // continue in inner loop |
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92 #define RA_BREAK 3 // break inner loop |
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93 #define RA_MATCH 4 // successful match |
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94 #define RA_NOMATCH 5 // didn't match |
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95 |
7 | 96 /* |
97 * Return NOT_MULTI if c is not a "multi" operator. | |
98 * Return MULTI_ONE if c is a single "multi" operator. | |
99 * Return MULTI_MULT if c is a multi "multi" operator. | |
100 */ | |
101 static int | |
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102 re_multi_type(int c) |
7 | 103 { |
104 if (c == Magic('@') || c == Magic('=') || c == Magic('?')) | |
105 return MULTI_ONE; | |
106 if (c == Magic('*') || c == Magic('+') || c == Magic('{')) | |
107 return MULTI_MULT; | |
108 return NOT_MULTI; | |
109 } | |
110 | |
359 | 111 static char_u *reg_prev_sub = NULL; |
112 | |
7 | 113 /* |
114 * REGEXP_INRANGE contains all characters which are always special in a [] | |
115 * range after '\'. | |
116 * REGEXP_ABBR contains all characters which act as abbreviations after '\'. | |
117 * These are: | |
118 * \n - New line (NL). | |
119 * \r - Carriage Return (CR). | |
120 * \t - Tab (TAB). | |
121 * \e - Escape (ESC). | |
122 * \b - Backspace (Ctrl_H). | |
24 | 123 * \d - Character code in decimal, eg \d123 |
124 * \o - Character code in octal, eg \o80 | |
125 * \x - Character code in hex, eg \x4a | |
126 * \u - Multibyte character code, eg \u20ac | |
127 * \U - Long multibyte character code, eg \U12345678 | |
7 | 128 */ |
129 static char_u REGEXP_INRANGE[] = "]^-n\\"; | |
24 | 130 static char_u REGEXP_ABBR[] = "nrtebdoxuU"; |
7 | 131 |
132 /* | |
133 * Translate '\x' to its control character, except "\n", which is Magic. | |
134 */ | |
135 static int | |
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136 backslash_trans(int c) |
7 | 137 { |
138 switch (c) | |
139 { | |
140 case 'r': return CAR; | |
141 case 't': return TAB; | |
142 case 'e': return ESC; | |
143 case 'b': return BS; | |
144 } | |
145 return c; | |
146 } | |
147 | |
148 /* | |
167 | 149 * Check for a character class name "[:name:]". "pp" points to the '['. |
7 | 150 * Returns one of the CLASS_ items. CLASS_NONE means that no item was |
151 * recognized. Otherwise "pp" is advanced to after the item. | |
152 */ | |
153 static int | |
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154 get_char_class(char_u **pp) |
7 | 155 { |
156 static const char *(class_names[]) = | |
157 { | |
158 "alnum:]", | |
159 #define CLASS_ALNUM 0 | |
160 "alpha:]", | |
161 #define CLASS_ALPHA 1 | |
162 "blank:]", | |
163 #define CLASS_BLANK 2 | |
164 "cntrl:]", | |
165 #define CLASS_CNTRL 3 | |
166 "digit:]", | |
167 #define CLASS_DIGIT 4 | |
168 "graph:]", | |
169 #define CLASS_GRAPH 5 | |
170 "lower:]", | |
171 #define CLASS_LOWER 6 | |
172 "print:]", | |
173 #define CLASS_PRINT 7 | |
174 "punct:]", | |
175 #define CLASS_PUNCT 8 | |
176 "space:]", | |
177 #define CLASS_SPACE 9 | |
178 "upper:]", | |
179 #define CLASS_UPPER 10 | |
180 "xdigit:]", | |
181 #define CLASS_XDIGIT 11 | |
182 "tab:]", | |
183 #define CLASS_TAB 12 | |
184 "return:]", | |
185 #define CLASS_RETURN 13 | |
186 "backspace:]", | |
187 #define CLASS_BACKSPACE 14 | |
188 "escape:]", | |
189 #define CLASS_ESCAPE 15 | |
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190 "ident:]", |
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191 #define CLASS_IDENT 16 |
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192 "keyword:]", |
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193 #define CLASS_KEYWORD 17 |
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194 "fname:]", |
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195 #define CLASS_FNAME 18 |
7 | 196 }; |
197 #define CLASS_NONE 99 | |
198 int i; | |
199 | |
200 if ((*pp)[1] == ':') | |
201 { | |
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202 for (i = 0; i < (int)ARRAY_LENGTH(class_names); ++i) |
7 | 203 if (STRNCMP(*pp + 2, class_names[i], STRLEN(class_names[i])) == 0) |
204 { | |
205 *pp += STRLEN(class_names[i]) + 2; | |
206 return i; | |
207 } | |
208 } | |
209 return CLASS_NONE; | |
210 } | |
211 | |
212 /* | |
213 * Specific version of character class functions. | |
214 * Using a table to keep this fast. | |
215 */ | |
216 static short class_tab[256]; | |
217 | |
218 #define RI_DIGIT 0x01 | |
219 #define RI_HEX 0x02 | |
220 #define RI_OCTAL 0x04 | |
221 #define RI_WORD 0x08 | |
222 #define RI_HEAD 0x10 | |
223 #define RI_ALPHA 0x20 | |
224 #define RI_LOWER 0x40 | |
225 #define RI_UPPER 0x80 | |
226 #define RI_WHITE 0x100 | |
227 | |
228 static void | |
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229 init_class_tab(void) |
7 | 230 { |
231 int i; | |
232 static int done = FALSE; | |
233 | |
234 if (done) | |
235 return; | |
236 | |
237 for (i = 0; i < 256; ++i) | |
238 { | |
239 if (i >= '0' && i <= '7') | |
240 class_tab[i] = RI_DIGIT + RI_HEX + RI_OCTAL + RI_WORD; | |
241 else if (i >= '8' && i <= '9') | |
242 class_tab[i] = RI_DIGIT + RI_HEX + RI_WORD; | |
243 else if (i >= 'a' && i <= 'f') | |
244 class_tab[i] = RI_HEX + RI_WORD + RI_HEAD + RI_ALPHA + RI_LOWER; | |
245 #ifdef EBCDIC | |
246 else if ((i >= 'g' && i <= 'i') || (i >= 'j' && i <= 'r') | |
247 || (i >= 's' && i <= 'z')) | |
248 #else | |
249 else if (i >= 'g' && i <= 'z') | |
250 #endif | |
251 class_tab[i] = RI_WORD + RI_HEAD + RI_ALPHA + RI_LOWER; | |
252 else if (i >= 'A' && i <= 'F') | |
253 class_tab[i] = RI_HEX + RI_WORD + RI_HEAD + RI_ALPHA + RI_UPPER; | |
254 #ifdef EBCDIC | |
255 else if ((i >= 'G' && i <= 'I') || ( i >= 'J' && i <= 'R') | |
256 || (i >= 'S' && i <= 'Z')) | |
257 #else | |
258 else if (i >= 'G' && i <= 'Z') | |
259 #endif | |
260 class_tab[i] = RI_WORD + RI_HEAD + RI_ALPHA + RI_UPPER; | |
261 else if (i == '_') | |
262 class_tab[i] = RI_WORD + RI_HEAD; | |
263 else | |
264 class_tab[i] = 0; | |
265 } | |
266 class_tab[' '] |= RI_WHITE; | |
267 class_tab['\t'] |= RI_WHITE; | |
268 done = TRUE; | |
269 } | |
270 | |
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271 #define ri_digit(c) (c < 0x100 && (class_tab[c] & RI_DIGIT)) |
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272 #define ri_hex(c) (c < 0x100 && (class_tab[c] & RI_HEX)) |
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273 #define ri_octal(c) (c < 0x100 && (class_tab[c] & RI_OCTAL)) |
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274 #define ri_word(c) (c < 0x100 && (class_tab[c] & RI_WORD)) |
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275 #define ri_head(c) (c < 0x100 && (class_tab[c] & RI_HEAD)) |
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276 #define ri_alpha(c) (c < 0x100 && (class_tab[c] & RI_ALPHA)) |
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277 #define ri_lower(c) (c < 0x100 && (class_tab[c] & RI_LOWER)) |
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278 #define ri_upper(c) (c < 0x100 && (class_tab[c] & RI_UPPER)) |
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279 #define ri_white(c) (c < 0x100 && (class_tab[c] & RI_WHITE)) |
7 | 280 |
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281 // flags for regflags |
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282 #define RF_ICASE 1 // ignore case |
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283 #define RF_NOICASE 2 // don't ignore case |
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284 #define RF_HASNL 4 // can match a NL |
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285 #define RF_ICOMBINE 8 // ignore combining characters |
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286 #define RF_LOOKBH 16 // uses "\@<=" or "\@<!" |
7 | 287 |
288 /* | |
289 * Global work variables for vim_regcomp(). | |
290 */ | |
291 | |
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292 static char_u *regparse; // Input-scan pointer. |
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293 static int regnpar; // () count. |
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294 static int wants_nfa; // regex should use NFA engine |
7 | 295 #ifdef FEAT_SYN_HL |
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296 static int regnzpar; // \z() count. |
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297 static int re_has_z; // \z item detected |
7 | 298 #endif |
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299 static unsigned regflags; // RF_ flags for prog |
7 | 300 #if defined(FEAT_SYN_HL) || defined(PROTO) |
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301 static int had_eol; // TRUE when EOL found by vim_regcomp() |
7 | 302 #endif |
303 | |
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304 static magic_T reg_magic; // magicness of the pattern |
7 | 305 |
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306 static int reg_string; // matching with a string instead of a buffer |
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307 // line |
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308 static int reg_strict; // "[abc" is illegal |
7 | 309 |
310 /* | |
311 * META contains all characters that may be magic, except '^' and '$'. | |
312 */ | |
313 | |
314 #ifdef EBCDIC | |
315 static char_u META[] = "%&()*+.123456789<=>?@ACDFHIKLMOPSUVWX[_acdfhiklmnopsuvwxz{|~"; | |
316 #else | |
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317 // META[] is used often enough to justify turning it into a table. |
7 | 318 static char_u META_flags[] = { |
319 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
320 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
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321 // % & ( ) * + . |
7 | 322 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, |
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323 // 1 2 3 4 5 6 7 8 9 < = > ? |
7 | 324 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, |
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325 // @ A C D F H I K L M O |
7 | 326 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, |
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327 // P S U V W X Z [ _ |
7 | 328 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, |
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329 // a c d f h i k l m n o |
7 | 330 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, |
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331 // p s u v w x z { | ~ |
7 | 332 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1 |
333 }; | |
334 #endif | |
335 | |
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336 static int curchr; // currently parsed character |
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337 // Previous character. Note: prevchr is sometimes -1 when we are not at the |
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338 // start, eg in /[ ^I]^ the pattern was never found even if it existed, |
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339 // because ^ was taken to be magic -- webb |
4444 | 340 static int prevchr; |
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341 static int prevprevchr; // previous-previous character |
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342 static int nextchr; // used for ungetchr() |
7 | 343 |
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344 // arguments for reg() |
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345 #define REG_NOPAREN 0 // toplevel reg() |
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346 #define REG_PAREN 1 // \(\) |
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347 #define REG_ZPAREN 2 // \z(\) |
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348 #define REG_NPAREN 3 // \%(\) |
7 | 349 |
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350 typedef struct |
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351 { |
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352 char_u *regparse; |
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353 int prevchr_len; |
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354 int curchr; |
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355 int prevchr; |
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356 int prevprevchr; |
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357 int nextchr; |
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358 int at_start; |
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359 int prev_at_start; |
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360 int regnpar; |
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361 } parse_state_T; |
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362 |
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363 static void initchr(char_u *); |
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364 static int getchr(void); |
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365 static void skipchr_keepstart(void); |
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366 static int peekchr(void); |
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367 static void skipchr(void); |
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368 static void ungetchr(void); |
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369 static long gethexchrs(int maxinputlen); |
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370 static long getoctchrs(void); |
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371 static long getdecchrs(void); |
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372 static int coll_get_char(void); |
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373 static int prog_magic_wrong(void); |
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374 static int cstrncmp(char_u *s1, char_u *s2, int *n); |
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375 static char_u *cstrchr(char_u *, int); |
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376 static int re_mult_next(char *what); |
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377 static int reg_iswordc(int); |
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378 #ifdef FEAT_EVAL |
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379 static void report_re_switch(char_u *pat); |
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380 #endif |
7 | 381 |
4444 | 382 static regengine_T bt_regengine; |
383 static regengine_T nfa_regengine; | |
384 | |
7 | 385 /* |
386 * Return TRUE if compiled regular expression "prog" can match a line break. | |
387 */ | |
388 int | |
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389 re_multiline(regprog_T *prog) |
7 | 390 { |
391 return (prog->regflags & RF_HASNL); | |
392 } | |
393 | |
394 /* | |
167 | 395 * Check for an equivalence class name "[=a=]". "pp" points to the '['. |
396 * Returns a character representing the class. Zero means that no item was | |
397 * recognized. Otherwise "pp" is advanced to after the item. | |
398 */ | |
399 static int | |
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400 get_equi_class(char_u **pp) |
167 | 401 { |
402 int c; | |
403 int l = 1; | |
404 char_u *p = *pp; | |
405 | |
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406 if (p[1] == '=' && p[2] != NUL) |
167 | 407 { |
408 if (has_mbyte) | |
474 | 409 l = (*mb_ptr2len)(p + 2); |
167 | 410 if (p[l + 2] == '=' && p[l + 3] == ']') |
411 { | |
412 if (has_mbyte) | |
413 c = mb_ptr2char(p + 2); | |
414 else | |
415 c = p[2]; | |
416 *pp += l + 4; | |
417 return c; | |
418 } | |
419 } | |
420 return 0; | |
421 } | |
422 | |
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423 #ifdef EBCDIC |
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424 /* |
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425 * Table for equivalence class "c". (IBM-1047) |
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426 */ |
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427 static char *EQUIVAL_CLASS_C[16] = { |
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428 "A\x62\x63\x64\x65\x66\x67", |
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429 "C\x68", |
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430 "E\x71\x72\x73\x74", |
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431 "I\x75\x76\x77\x78", |
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432 "N\x69", |
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433 "O\xEB\xEC\xED\xEE\xEF\x80", |
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434 "U\xFB\xFC\xFD\xFE", |
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435 "Y\xBA", |
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436 "a\x42\x43\x44\x45\x46\x47", |
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437 "c\x48", |
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438 "e\x51\x52\x53\x54", |
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439 "i\x55\x56\x57\x58", |
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440 "n\x49", |
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441 "o\xCB\xCC\xCD\xCE\xCF\x70", |
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442 "u\xDB\xDC\xDD\xDE", |
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443 "y\x8D\xDF", |
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444 }; |
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445 #endif |
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446 |
167 | 447 /* |
448 * Check for a collating element "[.a.]". "pp" points to the '['. | |
449 * Returns a character. Zero means that no item was recognized. Otherwise | |
450 * "pp" is advanced to after the item. | |
451 * Currently only single characters are recognized! | |
452 */ | |
453 static int | |
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454 get_coll_element(char_u **pp) |
167 | 455 { |
456 int c; | |
457 int l = 1; | |
458 char_u *p = *pp; | |
459 | |
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460 if (p[0] != NUL && p[1] == '.' && p[2] != NUL) |
167 | 461 { |
462 if (has_mbyte) | |
474 | 463 l = (*mb_ptr2len)(p + 2); |
167 | 464 if (p[l + 2] == '.' && p[l + 3] == ']') |
465 { | |
466 if (has_mbyte) | |
467 c = mb_ptr2char(p + 2); | |
468 else | |
469 c = p[2]; | |
470 *pp += l + 4; | |
471 return c; | |
472 } | |
473 } | |
474 return 0; | |
475 } | |
476 | |
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477 static int reg_cpo_lit; // 'cpoptions' contains 'l' flag |
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478 static int reg_cpo_bsl; // 'cpoptions' contains '\' flag |
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479 |
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480 static void |
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481 get_cpo_flags(void) |
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482 { |
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483 reg_cpo_lit = vim_strchr(p_cpo, CPO_LITERAL) != NULL; |
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484 reg_cpo_bsl = vim_strchr(p_cpo, CPO_BACKSL) != NULL; |
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485 } |
167 | 486 |
487 /* | |
488 * Skip over a "[]" range. | |
489 * "p" must point to the character after the '['. | |
490 * The returned pointer is on the matching ']', or the terminating NUL. | |
491 */ | |
492 static char_u * | |
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493 skip_anyof(char_u *p) |
167 | 494 { |
495 int l; | |
496 | |
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497 if (*p == '^') // Complement of range. |
167 | 498 ++p; |
499 if (*p == ']' || *p == '-') | |
500 ++p; | |
501 while (*p != NUL && *p != ']') | |
502 { | |
474 | 503 if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1) |
167 | 504 p += l; |
505 else | |
506 if (*p == '-') | |
507 { | |
508 ++p; | |
509 if (*p != ']' && *p != NUL) | |
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510 MB_PTR_ADV(p); |
167 | 511 } |
512 else if (*p == '\\' | |
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513 && !reg_cpo_bsl |
167 | 514 && (vim_strchr(REGEXP_INRANGE, p[1]) != NULL |
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515 || (!reg_cpo_lit && vim_strchr(REGEXP_ABBR, p[1]) != NULL))) |
167 | 516 p += 2; |
517 else if (*p == '[') | |
518 { | |
519 if (get_char_class(&p) == CLASS_NONE | |
520 && get_equi_class(&p) == 0 | |
6830 | 521 && get_coll_element(&p) == 0 |
522 && *p != NUL) | |
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523 ++p; // it is not a class name and not NUL |
167 | 524 } |
525 else | |
526 ++p; | |
527 } | |
528 | |
529 return p; | |
530 } | |
531 | |
532 /* | |
7 | 533 * Skip past regular expression. |
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534 * Stop at end of "startp" or where "delim" is found ('/', '?', etc). |
7 | 535 * Take care of characters with a backslash in front of it. |
536 * Skip strings inside [ and ]. | |
537 */ | |
538 char_u * | |
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539 skip_regexp( |
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540 char_u *startp, |
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541 int delim, |
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542 int magic) |
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543 { |
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544 return skip_regexp_ex(startp, delim, magic, NULL, NULL, NULL); |
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545 } |
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546 |
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547 /* |
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548 * Call skip_regexp() and when the delimiter does not match give an error and |
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549 * return NULL. |
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550 */ |
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551 char_u * |
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552 skip_regexp_err( |
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553 char_u *startp, |
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554 int delim, |
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555 int magic) |
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556 { |
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557 char_u *p = skip_regexp(startp, delim, magic); |
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558 |
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559 if (*p != delim) |
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560 { |
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561 semsg(_("E654: missing delimiter after search pattern: %s"), startp); |
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562 return NULL; |
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563 } |
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564 return p; |
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565 } |
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566 |
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567 /* |
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568 * skip_regexp() with extra arguments: |
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569 * When "newp" is not NULL and "dirc" is '?', make an allocated copy of the |
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570 * expression and change "\?" to "?". If "*newp" is not NULL the expression |
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571 * is changed in-place. |
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572 * If a "\?" is changed to "?" then "dropped" is incremented, unless NULL. |
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573 * If "magic_val" is not NULL, returns the effective magicness of the pattern |
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574 */ |
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575 char_u * |
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576 skip_regexp_ex( |
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577 char_u *startp, |
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578 int dirc, |
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579 int magic, |
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580 char_u **newp, |
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581 int *dropped, |
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582 magic_T *magic_val) |
7 | 583 { |
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584 magic_T mymagic; |
7 | 585 char_u *p = startp; |
586 | |
587 if (magic) | |
588 mymagic = MAGIC_ON; | |
589 else | |
590 mymagic = MAGIC_OFF; | |
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591 get_cpo_flags(); |
7 | 592 |
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593 for (; p[0] != NUL; MB_PTR_ADV(p)) |
7 | 594 { |
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595 if (p[0] == dirc) // found end of regexp |
7 | 596 break; |
597 if ((p[0] == '[' && mymagic >= MAGIC_ON) | |
598 || (p[0] == '\\' && p[1] == '[' && mymagic <= MAGIC_OFF)) | |
599 { | |
600 p = skip_anyof(p + 1); | |
601 if (p[0] == NUL) | |
602 break; | |
603 } | |
604 else if (p[0] == '\\' && p[1] != NUL) | |
605 { | |
606 if (dirc == '?' && newp != NULL && p[1] == '?') | |
607 { | |
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608 // change "\?" to "?", make a copy first. |
7 | 609 if (*newp == NULL) |
610 { | |
611 *newp = vim_strsave(startp); | |
612 if (*newp != NULL) | |
613 p = *newp + (p - startp); | |
614 } | |
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615 if (dropped != NULL) |
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616 ++*dropped; |
7 | 617 if (*newp != NULL) |
1621 | 618 STRMOVE(p, p + 1); |
7 | 619 else |
620 ++p; | |
621 } | |
622 else | |
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623 ++p; // skip next character |
7 | 624 if (*p == 'v') |
625 mymagic = MAGIC_ALL; | |
626 else if (*p == 'V') | |
627 mymagic = MAGIC_NONE; | |
628 } | |
629 } | |
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630 if (magic_val != NULL) |
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631 *magic_val = mymagic; |
7 | 632 return p; |
633 } | |
634 | |
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635 /* |
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636 * Functions for getting characters from the regexp input. |
7 | 637 */ |
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638 static int prevchr_len; // byte length of previous char |
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639 static int at_start; // True when on the first character |
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640 static int prev_at_start; // True when on the second character |
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641 |
7 | 642 /* |
4444 | 643 * Start parsing at "str". |
644 */ | |
7 | 645 static void |
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646 initchr(char_u *str) |
7 | 647 { |
648 regparse = str; | |
649 prevchr_len = 0; | |
650 curchr = prevprevchr = prevchr = nextchr = -1; | |
651 at_start = TRUE; | |
652 prev_at_start = FALSE; | |
653 } | |
654 | |
4444 | 655 /* |
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656 * Save the current parse state, so that it can be restored and parsing |
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657 * starts in the same state again. |
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658 */ |
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659 static void |
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660 save_parse_state(parse_state_T *ps) |
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661 { |
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662 ps->regparse = regparse; |
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663 ps->prevchr_len = prevchr_len; |
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664 ps->curchr = curchr; |
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665 ps->prevchr = prevchr; |
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666 ps->prevprevchr = prevprevchr; |
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667 ps->nextchr = nextchr; |
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668 ps->at_start = at_start; |
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669 ps->prev_at_start = prev_at_start; |
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670 ps->regnpar = regnpar; |
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671 } |
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672 |
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673 /* |
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674 * Restore a previously saved parse state. |
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675 */ |
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676 static void |
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677 restore_parse_state(parse_state_T *ps) |
4679
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678 { |
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679 regparse = ps->regparse; |
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680 prevchr_len = ps->prevchr_len; |
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681 curchr = ps->curchr; |
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682 prevchr = ps->prevchr; |
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683 prevprevchr = ps->prevprevchr; |
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684 nextchr = ps->nextchr; |
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685 at_start = ps->at_start; |
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686 prev_at_start = ps->prev_at_start; |
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687 regnpar = ps->regnpar; |
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688 } |
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689 |
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690 |
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691 /* |
4444 | 692 * Get the next character without advancing. |
693 */ | |
7 | 694 static int |
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695 peekchr(void) |
7 | 696 { |
167 | 697 static int after_slash = FALSE; |
698 | |
7 | 699 if (curchr == -1) |
700 { | |
701 switch (curchr = regparse[0]) | |
702 { | |
703 case '.': | |
704 case '[': | |
705 case '~': | |
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706 // magic when 'magic' is on |
7 | 707 if (reg_magic >= MAGIC_ON) |
708 curchr = Magic(curchr); | |
709 break; | |
710 case '(': | |
711 case ')': | |
712 case '{': | |
713 case '%': | |
714 case '+': | |
715 case '=': | |
716 case '?': | |
717 case '@': | |
718 case '!': | |
719 case '&': | |
720 case '|': | |
721 case '<': | |
722 case '>': | |
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723 case '#': // future ext. |
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724 case '"': // future ext. |
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725 case '\'': // future ext. |
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726 case ',': // future ext. |
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727 case '-': // future ext. |
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728 case ':': // future ext. |
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729 case ';': // future ext. |
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730 case '`': // future ext. |
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731 case '/': // Can't be used in / command |
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732 // magic only after "\v" |
7 | 733 if (reg_magic == MAGIC_ALL) |
734 curchr = Magic(curchr); | |
735 break; | |
736 case '*': | |
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737 // * is not magic as the very first character, eg "?*ptr", when |
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738 // after '^', eg "/^*ptr" and when after "\(", "\|", "\&". But |
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739 // "\(\*" is not magic, thus must be magic if "after_slash" |
167 | 740 if (reg_magic >= MAGIC_ON |
741 && !at_start | |
742 && !(prev_at_start && prevchr == Magic('^')) | |
743 && (after_slash | |
744 || (prevchr != Magic('(') | |
745 && prevchr != Magic('&') | |
746 && prevchr != Magic('|')))) | |
7 | 747 curchr = Magic('*'); |
748 break; | |
749 case '^': | |
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750 // '^' is only magic as the very first character and if it's after |
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751 // "\(", "\|", "\&' or "\n" |
7 | 752 if (reg_magic >= MAGIC_OFF |
753 && (at_start | |
754 || reg_magic == MAGIC_ALL | |
755 || prevchr == Magic('(') | |
756 || prevchr == Magic('|') | |
757 || prevchr == Magic('&') | |
758 || prevchr == Magic('n') | |
759 || (no_Magic(prevchr) == '(' | |
760 && prevprevchr == Magic('%')))) | |
761 { | |
762 curchr = Magic('^'); | |
763 at_start = TRUE; | |
764 prev_at_start = FALSE; | |
765 } | |
766 break; | |
767 case '$': | |
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768 // '$' is only magic as the very last char and if it's in front of |
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769 // either "\|", "\)", "\&", or "\n" |
7 | 770 if (reg_magic >= MAGIC_OFF) |
771 { | |
772 char_u *p = regparse + 1; | |
6041 | 773 int is_magic_all = (reg_magic == MAGIC_ALL); |
774 | |
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775 // ignore \c \C \m \M \v \V and \Z after '$' |
7 | 776 while (p[0] == '\\' && (p[1] == 'c' || p[1] == 'C' |
6041 | 777 || p[1] == 'm' || p[1] == 'M' |
778 || p[1] == 'v' || p[1] == 'V' || p[1] == 'Z')) | |
779 { | |
780 if (p[1] == 'v') | |
781 is_magic_all = TRUE; | |
782 else if (p[1] == 'm' || p[1] == 'M' || p[1] == 'V') | |
783 is_magic_all = FALSE; | |
7 | 784 p += 2; |
6041 | 785 } |
7 | 786 if (p[0] == NUL |
787 || (p[0] == '\\' | |
788 && (p[1] == '|' || p[1] == '&' || p[1] == ')' | |
789 || p[1] == 'n')) | |
6041 | 790 || (is_magic_all |
791 && (p[0] == '|' || p[0] == '&' || p[0] == ')')) | |
7 | 792 || reg_magic == MAGIC_ALL) |
793 curchr = Magic('$'); | |
794 } | |
795 break; | |
796 case '\\': | |
797 { | |
798 int c = regparse[1]; | |
799 | |
800 if (c == NUL) | |
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801 curchr = '\\'; // trailing '\' |
7 | 802 else if ( |
803 #ifdef EBCDIC | |
804 vim_strchr(META, c) | |
805 #else | |
806 c <= '~' && META_flags[c] | |
807 #endif | |
808 ) | |
809 { | |
810 /* | |
811 * META contains everything that may be magic sometimes, | |
812 * except ^ and $ ("\^" and "\$" are only magic after | |
6830 | 813 * "\V"). We now fetch the next character and toggle its |
7 | 814 * magicness. Therefore, \ is so meta-magic that it is |
815 * not in META. | |
816 */ | |
817 curchr = -1; | |
818 prev_at_start = at_start; | |
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819 at_start = FALSE; // be able to say "/\*ptr" |
7 | 820 ++regparse; |
167 | 821 ++after_slash; |
7 | 822 peekchr(); |
823 --regparse; | |
167 | 824 --after_slash; |
7 | 825 curchr = toggle_Magic(curchr); |
826 } | |
827 else if (vim_strchr(REGEXP_ABBR, c)) | |
828 { | |
829 /* | |
830 * Handle abbreviations, like "\t" for TAB -- webb | |
831 */ | |
832 curchr = backslash_trans(c); | |
833 } | |
834 else if (reg_magic == MAGIC_NONE && (c == '$' || c == '^')) | |
835 curchr = toggle_Magic(c); | |
836 else | |
837 { | |
838 /* | |
839 * Next character can never be (made) magic? | |
840 * Then backslashing it won't do anything. | |
841 */ | |
842 if (has_mbyte) | |
843 curchr = (*mb_ptr2char)(regparse + 1); | |
844 else | |
845 curchr = c; | |
846 } | |
847 break; | |
848 } | |
849 | |
850 default: | |
851 if (has_mbyte) | |
852 curchr = (*mb_ptr2char)(regparse); | |
853 } | |
854 } | |
855 | |
856 return curchr; | |
857 } | |
858 | |
859 /* | |
860 * Eat one lexed character. Do this in a way that we can undo it. | |
861 */ | |
862 static void | |
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863 skipchr(void) |
7 | 864 { |
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865 // peekchr() eats a backslash, do the same here |
7 | 866 if (*regparse == '\\') |
867 prevchr_len = 1; | |
868 else | |
869 prevchr_len = 0; | |
870 if (regparse[prevchr_len] != NUL) | |
871 { | |
714 | 872 if (enc_utf8) |
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873 // exclude composing chars that mb_ptr2len does include |
1449 | 874 prevchr_len += utf_ptr2len(regparse + prevchr_len); |
714 | 875 else if (has_mbyte) |
474 | 876 prevchr_len += (*mb_ptr2len)(regparse + prevchr_len); |
7 | 877 else |
878 ++prevchr_len; | |
879 } | |
880 regparse += prevchr_len; | |
881 prev_at_start = at_start; | |
882 at_start = FALSE; | |
883 prevprevchr = prevchr; | |
884 prevchr = curchr; | |
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885 curchr = nextchr; // use previously unget char, or -1 |
7 | 886 nextchr = -1; |
887 } | |
888 | |
889 /* | |
890 * Skip a character while keeping the value of prev_at_start for at_start. | |
891 * prevchr and prevprevchr are also kept. | |
892 */ | |
893 static void | |
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894 skipchr_keepstart(void) |
7 | 895 { |
896 int as = prev_at_start; | |
897 int pr = prevchr; | |
898 int prpr = prevprevchr; | |
899 | |
900 skipchr(); | |
901 at_start = as; | |
902 prevchr = pr; | |
903 prevprevchr = prpr; | |
904 } | |
905 | |
4444 | 906 /* |
907 * Get the next character from the pattern. We know about magic and such, so | |
908 * therefore we need a lexical analyzer. | |
909 */ | |
7 | 910 static int |
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911 getchr(void) |
7 | 912 { |
913 int chr = peekchr(); | |
914 | |
915 skipchr(); | |
916 return chr; | |
917 } | |
918 | |
919 /* | |
920 * put character back. Works only once! | |
921 */ | |
922 static void | |
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923 ungetchr(void) |
7 | 924 { |
925 nextchr = curchr; | |
926 curchr = prevchr; | |
927 prevchr = prevprevchr; | |
928 at_start = prev_at_start; | |
929 prev_at_start = FALSE; | |
930 | |
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931 // Backup regparse, so that it's at the same position as before the |
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932 // getchr(). |
7 | 933 regparse -= prevchr_len; |
934 } | |
935 | |
936 /* | |
29 | 937 * Get and return the value of the hex string at the current position. |
938 * Return -1 if there is no valid hex number. | |
939 * The position is updated: | |
24 | 940 * blahblah\%x20asdf |
856 | 941 * before-^ ^-after |
24 | 942 * The parameter controls the maximum number of input characters. This will be |
943 * 2 when reading a \%x20 sequence and 4 when reading a \%u20AC sequence. | |
944 */ | |
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945 static long |
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946 gethexchrs(int maxinputlen) |
24 | 947 { |
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948 long_u nr = 0; |
24 | 949 int c; |
950 int i; | |
951 | |
952 for (i = 0; i < maxinputlen; ++i) | |
953 { | |
954 c = regparse[0]; | |
955 if (!vim_isxdigit(c)) | |
956 break; | |
957 nr <<= 4; | |
958 nr |= hex2nr(c); | |
959 ++regparse; | |
960 } | |
961 | |
962 if (i == 0) | |
963 return -1; | |
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964 return (long)nr; |
24 | 965 } |
966 | |
967 /* | |
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968 * Get and return the value of the decimal string immediately after the |
24 | 969 * current position. Return -1 for invalid. Consumes all digits. |
970 */ | |
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971 static long |
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972 getdecchrs(void) |
24 | 973 { |
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974 long_u nr = 0; |
24 | 975 int c; |
976 int i; | |
977 | |
978 for (i = 0; ; ++i) | |
979 { | |
980 c = regparse[0]; | |
981 if (c < '0' || c > '9') | |
982 break; | |
983 nr *= 10; | |
984 nr += c - '0'; | |
985 ++regparse; | |
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986 curchr = -1; // no longer valid |
24 | 987 } |
988 | |
989 if (i == 0) | |
990 return -1; | |
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991 return (long)nr; |
24 | 992 } |
993 | |
994 /* | |
995 * get and return the value of the octal string immediately after the current | |
996 * position. Return -1 for invalid, or 0-255 for valid. Smart enough to handle | |
997 * numbers > 377 correctly (for example, 400 is treated as 40) and doesn't | |
998 * treat 8 or 9 as recognised characters. Position is updated: | |
999 * blahblah\%o210asdf | |
856 | 1000 * before-^ ^-after |
24 | 1001 */ |
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1002 static long |
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1003 getoctchrs(void) |
24 | 1004 { |
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1005 long_u nr = 0; |
24 | 1006 int c; |
1007 int i; | |
1008 | |
1009 for (i = 0; i < 3 && nr < 040; ++i) | |
1010 { | |
1011 c = regparse[0]; | |
1012 if (c < '0' || c > '7') | |
1013 break; | |
1014 nr <<= 3; | |
1015 nr |= hex2nr(c); | |
1016 ++regparse; | |
1017 } | |
1018 | |
1019 if (i == 0) | |
1020 return -1; | |
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1021 return (long)nr; |
24 | 1022 } |
1023 | |
1024 /* | |
7 | 1025 * read_limits - Read two integers to be taken as a minimum and maximum. |
1026 * If the first character is '-', then the range is reversed. | |
1027 * Should end with 'end'. If minval is missing, zero is default, if maxval is | |
1028 * missing, a very big number is the default. | |
1029 */ | |
1030 static int | |
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1031 read_limits(long *minval, long *maxval) |
7 | 1032 { |
1033 int reverse = FALSE; | |
1034 char_u *first_char; | |
1035 long tmp; | |
1036 | |
1037 if (*regparse == '-') | |
1038 { | |
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1039 // Starts with '-', so reverse the range later |
7 | 1040 regparse++; |
1041 reverse = TRUE; | |
1042 } | |
1043 first_char = regparse; | |
1044 *minval = getdigits(®parse); | |
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1045 if (*regparse == ',') // There is a comma |
7 | 1046 { |
1047 if (vim_isdigit(*++regparse)) | |
1048 *maxval = getdigits(®parse); | |
1049 else | |
1050 *maxval = MAX_LIMIT; | |
1051 } | |
1052 else if (VIM_ISDIGIT(*first_char)) | |
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1053 *maxval = *minval; // It was \{n} or \{-n} |
7 | 1054 else |
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1055 *maxval = MAX_LIMIT; // It was \{} or \{-} |
7 | 1056 if (*regparse == '\\') |
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1057 regparse++; // Allow either \{...} or \{...\} |
167 | 1058 if (*regparse != '}') |
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1059 EMSG2_RET_FAIL(_("E554: Syntax error in %s{...}"), |
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1060 reg_magic == MAGIC_ALL); |
7 | 1061 |
1062 /* | |
1063 * Reverse the range if there was a '-', or make sure it is in the right | |
1064 * order otherwise. | |
1065 */ | |
1066 if ((!reverse && *minval > *maxval) || (reverse && *minval < *maxval)) | |
1067 { | |
1068 tmp = *minval; | |
1069 *minval = *maxval; | |
1070 *maxval = tmp; | |
1071 } | |
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1072 skipchr(); // let's be friends with the lexer again |
7 | 1073 return OK; |
1074 } | |
1075 | |
1076 /* | |
1077 * vim_regexec and friends | |
1078 */ | |
1079 | |
1080 /* | |
1081 * Global work variables for vim_regexec(). | |
1082 */ | |
1083 | |
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1084 static void cleanup_subexpr(void); |
7 | 1085 #ifdef FEAT_SYN_HL |
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1086 static void cleanup_zsubexpr(void); |
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1087 #endif |
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1088 static void reg_nextline(void); |
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1089 static int match_with_backref(linenr_T start_lnum, colnr_T start_col, linenr_T end_lnum, colnr_T end_col, int *bytelen); |
7 | 1090 |
1091 /* | |
1092 * Sometimes need to save a copy of a line. Since alloc()/free() is very | |
1093 * slow, we keep one allocated piece of memory and only re-allocate it when | |
4444 | 1094 * it's too small. It's freed in bt_regexec_both() when finished. |
7 | 1095 */ |
1468 | 1096 static char_u *reg_tofree = NULL; |
7 | 1097 static unsigned reg_tofreelen; |
1098 | |
1099 /* | |
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1100 * Structure used to store the execution state of the regex engine. |
1209 | 1101 * Which ones are set depends on whether a single-line or multi-line match is |
7 | 1102 * done: |
1103 * single-line multi-line | |
1104 * reg_match ®match_T NULL | |
1105 * reg_mmatch NULL ®mmatch_T | |
1106 * reg_startp reg_match->startp <invalid> | |
1107 * reg_endp reg_match->endp <invalid> | |
1108 * reg_startpos <invalid> reg_mmatch->startpos | |
1109 * reg_endpos <invalid> reg_mmatch->endpos | |
1110 * reg_win NULL window in which to search | |
4061 | 1111 * reg_buf curbuf buffer in which to search |
7 | 1112 * reg_firstlnum <invalid> first line in which to search |
1113 * reg_maxline 0 last line nr | |
1114 * reg_line_lbr FALSE or TRUE FALSE | |
1115 */ | |
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1116 typedef struct { |
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1117 regmatch_T *reg_match; |
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1118 regmmatch_T *reg_mmatch; |
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1119 char_u **reg_startp; |
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1120 char_u **reg_endp; |
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1121 lpos_T *reg_startpos; |
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1122 lpos_T *reg_endpos; |
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1123 win_T *reg_win; |
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1124 buf_T *reg_buf; |
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1125 linenr_T reg_firstlnum; |
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1126 linenr_T reg_maxline; |
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1127 int reg_line_lbr; // "\n" in string is line break |
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1128 |
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1129 // The current match-position is stord in these variables: |
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1130 linenr_T lnum; // line number, relative to first line |
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1131 char_u *line; // start of current line |
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1132 char_u *input; // current input, points into "regline" |
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1133 |
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1134 int need_clear_subexpr; // subexpressions still need to be cleared |
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1135 #ifdef FEAT_SYN_HL |
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1136 int need_clear_zsubexpr; // extmatch subexpressions still need to be |
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1137 // cleared |
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1138 #endif |
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1139 |
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1140 // Internal copy of 'ignorecase'. It is set at each call to vim_regexec(). |
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1141 // Normally it gets the value of "rm_ic" or "rmm_ic", but when the pattern |
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1142 // contains '\c' or '\C' the value is overruled. |
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1143 int reg_ic; |
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1144 |
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1145 // Similar to "reg_ic", but only for 'combining' characters. Set with \Z |
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1146 // flag in the regexp. Defaults to false, always. |
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1147 int reg_icombine; |
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1148 |
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1149 // Copy of "rmm_maxcol": maximum column to search for a match. Zero when |
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1150 // there is no maximum. |
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1151 colnr_T reg_maxcol; |
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1152 |
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1153 // State for the NFA engine regexec. |
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1154 int nfa_has_zend; // NFA regexp \ze operator encountered. |
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1155 int nfa_has_backref; // NFA regexp \1 .. \9 encountered. |
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1156 int nfa_nsubexpr; // Number of sub expressions actually being used |
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1157 // during execution. 1 if only the whole match |
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1158 // (subexpr 0) is used. |
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1159 // listid is global, so that it increases on recursive calls to |
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1160 // nfa_regmatch(), which means we don't have to clear the lastlist field of |
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1161 // all the states. |
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1162 int nfa_listid; |
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1163 int nfa_alt_listid; |
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1164 |
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1165 #ifdef FEAT_SYN_HL |
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1166 int nfa_has_zsubexpr; // NFA regexp has \z( ), set zsubexpr. |
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1167 #endif |
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1168 } regexec_T; |
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1169 |
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1170 static regexec_T rex; |
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1171 static int rex_in_use = FALSE; |
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1172 |
7 | 1173 /* |
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1174 * Return TRUE if character 'c' is included in 'iskeyword' option for |
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1175 * "reg_buf" buffer. |
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1176 */ |
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1177 static int |
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1178 reg_iswordc(int c) |
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1179 { |
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1180 return vim_iswordc_buf(c, rex.reg_buf); |
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1181 } |
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1182 |
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Bram Moolenaar <Bram@vim.org>
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15603
diff
changeset
|
1183 /* |
7 | 1184 * Get pointer to the line "lnum", which is relative to "reg_firstlnum". |
1185 */ | |
1186 static char_u * | |
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Christian Brabandt <cb@256bit.org>
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7807
diff
changeset
|
1187 reg_getline(linenr_T lnum) |
7 | 1188 { |
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patch 8.1.2394: using old C style comments
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parents:
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diff
changeset
|
1189 // when looking behind for a match/no-match lnum is negative. But we |
d34ec6fe207d
patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18576
diff
changeset
|
1190 // can't go before line 1 |
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commit https://github.com/vim/vim/commit/6100d02aab7c8294b581cb299250eea164b50e9d
Christian Brabandt <cb@256bit.org>
parents:
10187
diff
changeset
|
1191 if (rex.reg_firstlnum + lnum < 1) |
7 | 1192 return NULL; |
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Christian Brabandt <cb@256bit.org>
parents:
10187
diff
changeset
|
1193 if (lnum > rex.reg_maxline) |
18812
d34ec6fe207d
patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18576
diff
changeset
|
1194 // Must have matched the "\n" in the last line. |
481 | 1195 return (char_u *)""; |
10245
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commit https://github.com/vim/vim/commit/6100d02aab7c8294b581cb299250eea164b50e9d
Christian Brabandt <cb@256bit.org>
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10187
diff
changeset
|
1196 return ml_get_buf(rex.reg_buf, rex.reg_firstlnum + lnum, FALSE); |
7 | 1197 } |
1198 | |
1199 #ifdef FEAT_SYN_HL | |
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patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18576
diff
changeset
|
1200 static char_u *reg_startzp[NSUBEXP]; // Workspace to mark beginning |
d34ec6fe207d
patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
1201 static char_u *reg_endzp[NSUBEXP]; // and end of \z(...\) matches |
d34ec6fe207d
patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18576
diff
changeset
|
1202 static lpos_T reg_startzpos[NSUBEXP]; // idem, beginning pos |
d34ec6fe207d
patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18576
diff
changeset
|
1203 static lpos_T reg_endzpos[NSUBEXP]; // idem, end pos |
7 | 1204 #endif |
1205 | |
18812
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patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18576
diff
changeset
|
1206 // TRUE if using multi-line regexp. |
10245
d76ccdacb41e
commit https://github.com/vim/vim/commit/6100d02aab7c8294b581cb299250eea164b50e9d
Christian Brabandt <cb@256bit.org>
parents:
10187
diff
changeset
|
1207 #define REG_MULTI (rex.reg_match == NULL) |
4444 | 1208 |
7 | 1209 #ifdef FEAT_SYN_HL |
1210 /* | |
1211 * Create a new extmatch and mark it as referenced once. | |
1212 */ | |
1213 static reg_extmatch_T * | |
7833
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Christian Brabandt <cb@256bit.org>
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7807
diff
changeset
|
1214 make_extmatch(void) |
7 | 1215 { |
1216 reg_extmatch_T *em; | |
1217 | |
16825
ce04ebdf26b8
patch 8.1.1414: alloc() returning "char_u *" causes a lot of type casts
Bram Moolenaar <Bram@vim.org>
parents:
16768
diff
changeset
|
1218 em = ALLOC_CLEAR_ONE(reg_extmatch_T); |
7 | 1219 if (em != NULL) |
1220 em->refcnt = 1; | |
1221 return em; | |
1222 } | |
1223 | |
1224 /* | |
1225 * Add a reference to an extmatch. | |
1226 */ | |
1227 reg_extmatch_T * | |
7833
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Christian Brabandt <cb@256bit.org>
parents:
7807
diff
changeset
|
1228 ref_extmatch(reg_extmatch_T *em) |
7 | 1229 { |
1230 if (em != NULL) | |
1231 em->refcnt++; | |
1232 return em; | |
1233 } | |
1234 | |
1235 /* | |
1236 * Remove a reference to an extmatch. If there are no references left, free | |
1237 * the info. | |
1238 */ | |
1239 void | |
7833
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Christian Brabandt <cb@256bit.org>
parents:
7807
diff
changeset
|
1240 unref_extmatch(reg_extmatch_T *em) |
7 | 1241 { |
1242 int i; | |
1243 | |
1244 if (em != NULL && --em->refcnt <= 0) | |
1245 { | |
1246 for (i = 0; i < NSUBEXP; ++i) | |
1247 vim_free(em->matches[i]); | |
1248 vim_free(em); | |
1249 } | |
1250 } | |
1251 #endif | |
1252 | |
1253 /* | |
1254 * Get class of previous character. | |
1255 */ | |
1256 static int | |
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Christian Brabandt <cb@256bit.org>
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diff
changeset
|
1257 reg_prev_class(void) |
7 | 1258 { |
14354
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patch 8.1.0192: executing regexp recursively fails with a crash
Christian Brabandt <cb@256bit.org>
parents:
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diff
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|
1259 if (rex.input > rex.line) |
ffd834f893aa
patch 8.1.0192: executing regexp recursively fails with a crash
Christian Brabandt <cb@256bit.org>
parents:
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diff
changeset
|
1260 return mb_get_class_buf(rex.input - 1 |
15603
639b8318472c
patch 8.1.0809: too many #ifdefs
Bram Moolenaar <Bram@vim.org>
parents:
15555
diff
changeset
|
1261 - (*mb_head_off)(rex.line, rex.input - 1), rex.reg_buf); |
7 | 1262 return -1; |
1263 } | |
5735 | 1264 |
4730
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|
1265 /* |
14354
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parents:
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diff
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|
1266 * Return TRUE if the current rex.input position matches the Visual area. |
4730
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|
1267 */ |
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|
1268 static int |
7833
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commit https://github.com/vim/vim/commit/055409764ca5f7978d4c399d2c440af0ce971c4f
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parents:
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diff
changeset
|
1269 reg_match_visual(void) |
4730
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|
1270 { |
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|
1271 pos_T top, bot; |
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|
1272 linenr_T lnum; |
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updated for version 7.3.1112
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|
1273 colnr_T col; |
10245
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10187
diff
changeset
|
1274 win_T *wp = rex.reg_win == NULL ? curwin : rex.reg_win; |
4730
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|
1275 int mode; |
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|
1276 colnr_T start, end; |
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|
1277 colnr_T start2, end2; |
749e2b2755d5
updated for version 7.3.1112
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|
1278 colnr_T cols; |
24745
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patch 8.2.2911: pattern "%V" does not match all of block selection
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
1279 colnr_T curswant; |
4730
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|
1280 |
18812
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patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
1281 // Check if the buffer is the current buffer. |
10245
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Christian Brabandt <cb@256bit.org>
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10187
diff
changeset
|
1282 if (rex.reg_buf != curbuf || VIsual.lnum == 0) |
4730
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|
1283 return FALSE; |
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|
1284 |
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parents:
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|
1285 if (VIsual_active) |
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diff
changeset
|
1286 { |
11121
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patch 8.0.0448: some macros are in lower case
Christian Brabandt <cb@256bit.org>
parents:
10359
diff
changeset
|
1287 if (LT_POS(VIsual, wp->w_cursor)) |
4730
749e2b2755d5
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|
1288 { |
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|
1289 top = VIsual; |
749e2b2755d5
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|
1290 bot = wp->w_cursor; |
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|
1291 } |
749e2b2755d5
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diff
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|
1292 else |
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|
1293 { |
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parents:
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diff
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|
1294 top = wp->w_cursor; |
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updated for version 7.3.1112
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|
1295 bot = VIsual; |
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diff
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|
1296 } |
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updated for version 7.3.1112
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diff
changeset
|
1297 mode = VIsual_mode; |
24745
b1fa3f005c93
patch 8.2.2911: pattern "%V" does not match all of block selection
Bram Moolenaar <Bram@vim.org>
parents:
24488
diff
changeset
|
1298 curswant = wp->w_curswant; |
4730
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|
1299 } |
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|
1300 else |
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updated for version 7.3.1112
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|
1301 { |
11121
778c10516955
patch 8.0.0448: some macros are in lower case
Christian Brabandt <cb@256bit.org>
parents:
10359
diff
changeset
|
1302 if (LT_POS(curbuf->b_visual.vi_start, curbuf->b_visual.vi_end)) |
4730
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updated for version 7.3.1112
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|
1303 { |
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diff
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|
1304 top = curbuf->b_visual.vi_start; |
749e2b2755d5
updated for version 7.3.1112
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|
1305 bot = curbuf->b_visual.vi_end; |
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updated for version 7.3.1112
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|
1306 } |
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|
1307 else |
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|
1308 { |
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diff
changeset
|
1309 top = curbuf->b_visual.vi_end; |
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updated for version 7.3.1112
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|
1310 bot = curbuf->b_visual.vi_start; |
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|
1311 } |
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|
1312 mode = curbuf->b_visual.vi_mode; |
24745
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patch 8.2.2911: pattern "%V" does not match all of block selection
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diff
changeset
|
1313 curswant = curbuf->b_visual.vi_curswant; |
4730
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diff
changeset
|
1314 } |
14354
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parents:
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diff
changeset
|
1315 lnum = rex.lnum + rex.reg_firstlnum; |
4730
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changeset
|
1316 if (lnum < top.lnum || lnum > bot.lnum) |
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|
1317 return FALSE; |
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|
1318 |
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diff
changeset
|
1319 if (mode == 'v') |
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updated for version 7.3.1112
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|
1320 { |
14354
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patch 8.1.0192: executing regexp recursively fails with a crash
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diff
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|
1321 col = (colnr_T)(rex.input - rex.line); |
4730
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|
1322 if ((lnum == top.lnum && col < top.col) |
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|
1323 || (lnum == bot.lnum && col >= bot.col + (*p_sel != 'e'))) |
749e2b2755d5
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|
1324 return FALSE; |
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|
1325 } |
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|
1326 else if (mode == Ctrl_V) |
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|
1327 { |
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changeset
|
1328 getvvcol(wp, &top, &start, NULL, &end); |
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updated for version 7.3.1112
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changeset
|
1329 getvvcol(wp, &bot, &start2, NULL, &end2); |
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updated for version 7.3.1112
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|
1330 if (start2 < start) |
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|
1331 start = start2; |
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|
1332 if (end2 > end) |
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updated for version 7.3.1112
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changeset
|
1333 end = end2; |
24745
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|
1334 if (top.col == MAXCOL || bot.col == MAXCOL || curswant == MAXCOL) |
4730
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updated for version 7.3.1112
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changeset
|
1335 end = MAXCOL; |
14354
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diff
changeset
|
1336 cols = win_linetabsize(wp, rex.line, (colnr_T)(rex.input - rex.line)); |
4730
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|
1337 if (cols < start || cols > end - (*p_sel == 'e')) |
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|
1338 return FALSE; |
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|
1339 } |
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|
1340 return TRUE; |
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|
1341 } |
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1342 |
7 | 1343 /* |
1344 * Check the regexp program for its magic number. | |
1345 * Return TRUE if it's wrong. | |
1346 */ | |
1347 static int | |
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diff
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|
1348 prog_magic_wrong(void) |
7 | 1349 { |
4444 | 1350 regprog_T *prog; |
1351 | |
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|
1352 prog = REG_MULTI ? rex.reg_mmatch->regprog : rex.reg_match->regprog; |
4444 | 1353 if (prog->engine == &nfa_regengine) |
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|
1354 // For NFA matcher we don't check the magic |
4444 | 1355 return FALSE; |
1356 | |
1357 if (UCHARAT(((bt_regprog_T *)prog)->program) != REGMAGIC) | |
7 | 1358 { |
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|
1359 emsg(_(e_corrupted_regexp_program)); |
7 | 1360 return TRUE; |
1361 } | |
1362 return FALSE; | |
1363 } | |
1364 | |
1365 /* | |
1366 * Cleanup the subexpressions, if this wasn't done yet. | |
1367 * This construction is used to clear the subexpressions only when they are | |
1368 * used (to increase speed). | |
1369 */ | |
1370 static void | |
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1371 cleanup_subexpr(void) |
7 | 1372 { |
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1373 if (rex.need_clear_subexpr) |
7 | 1374 { |
1375 if (REG_MULTI) | |
1376 { | |
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|
1377 // Use 0xff to set lnum to -1 |
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1378 vim_memset(rex.reg_startpos, 0xff, sizeof(lpos_T) * NSUBEXP); |
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1379 vim_memset(rex.reg_endpos, 0xff, sizeof(lpos_T) * NSUBEXP); |
7 | 1380 } |
1381 else | |
1382 { | |
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|
1383 vim_memset(rex.reg_startp, 0, sizeof(char_u *) * NSUBEXP); |
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|
1384 vim_memset(rex.reg_endp, 0, sizeof(char_u *) * NSUBEXP); |
7 | 1385 } |
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1386 rex.need_clear_subexpr = FALSE; |
7 | 1387 } |
1388 } | |
1389 | |
1390 #ifdef FEAT_SYN_HL | |
1391 static void | |
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|
1392 cleanup_zsubexpr(void) |
7 | 1393 { |
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1394 if (rex.need_clear_zsubexpr) |
7 | 1395 { |
1396 if (REG_MULTI) | |
1397 { | |
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1398 // Use 0xff to set lnum to -1 |
7 | 1399 vim_memset(reg_startzpos, 0xff, sizeof(lpos_T) * NSUBEXP); |
1400 vim_memset(reg_endzpos, 0xff, sizeof(lpos_T) * NSUBEXP); | |
1401 } | |
1402 else | |
1403 { | |
1404 vim_memset(reg_startzp, 0, sizeof(char_u *) * NSUBEXP); | |
1405 vim_memset(reg_endzp, 0, sizeof(char_u *) * NSUBEXP); | |
1406 } | |
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1407 rex.need_clear_zsubexpr = FALSE; |
7 | 1408 } |
1409 } | |
1410 #endif | |
1411 | |
1412 /* | |
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1413 * Advance rex.lnum, rex.line and rex.input to the next line. |
7 | 1414 */ |
1415 static void | |
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1416 reg_nextline(void) |
7 | 1417 { |
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1418 rex.line = reg_getline(++rex.lnum); |
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1419 rex.input = rex.line; |
7 | 1420 fast_breakcheck(); |
1421 } | |
1422 | |
1423 /* | |
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1424 * Check whether a backreference matches. |
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1425 * Returns RA_FAIL, RA_NOMATCH or RA_MATCH. |
5504 | 1426 * If "bytelen" is not NULL, it is set to the byte length of the match in the |
1427 * last line. | |
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1428 */ |
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1429 static int |
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1430 match_with_backref( |
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1431 linenr_T start_lnum, |
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1432 colnr_T start_col, |
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1433 linenr_T end_lnum, |
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1434 colnr_T end_col, |
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1435 int *bytelen) |
4891
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1436 { |
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1437 linenr_T clnum = start_lnum; |
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1438 colnr_T ccol = start_col; |
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1439 int len; |
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1440 char_u *p; |
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1441 |
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1442 if (bytelen != NULL) |
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1443 *bytelen = 0; |
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1444 for (;;) |
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1445 { |
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1446 // Since getting one line may invalidate the other, need to make copy. |
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1447 // Slow! |
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1448 if (rex.line != reg_tofree) |
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1449 { |
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1450 len = (int)STRLEN(rex.line); |
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1451 if (reg_tofree == NULL || len >= (int)reg_tofreelen) |
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1452 { |
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|
1453 len += 50; // get some extra |
4891
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1454 vim_free(reg_tofree); |
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|
1455 reg_tofree = alloc(len); |
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1456 if (reg_tofree == NULL) |
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|
1457 return RA_FAIL; // out of memory! |
4891
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|
1458 reg_tofreelen = len; |
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1459 } |
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1460 STRCPY(reg_tofree, rex.line); |
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|
1461 rex.input = reg_tofree + (rex.input - rex.line); |
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1462 rex.line = reg_tofree; |
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1463 } |
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1464 |
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1465 // Get the line to compare with. |
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1466 p = reg_getline(clnum); |
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|
1467 if (clnum == end_lnum) |
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1468 len = end_col - ccol; |
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1469 else |
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1470 len = (int)STRLEN(p + ccol); |
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1471 |
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1472 if (cstrncmp(p + ccol, rex.input, &len) != 0) |
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1473 return RA_NOMATCH; // doesn't match |
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1474 if (bytelen != NULL) |
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1475 *bytelen += len; |
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1476 if (clnum == end_lnum) |
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1477 break; // match and at end! |
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1478 if (rex.lnum >= rex.reg_maxline) |
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1479 return RA_NOMATCH; // text too short |
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1480 |
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1481 // Advance to next line. |
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1482 reg_nextline(); |
5504 | 1483 if (bytelen != NULL) |
1484 *bytelen = 0; | |
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1485 ++clnum; |
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1486 ccol = 0; |
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1487 if (got_int) |
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1488 return RA_FAIL; |
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1489 } |
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1490 |
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1491 // found a match! Note that rex.line may now point to a copy of the line, |
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1492 // that should not matter. |
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1493 return RA_MATCH; |
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1494 } |
7 | 1495 |
6203 | 1496 /* |
1497 * Used in a place where no * or \+ can follow. | |
1498 */ | |
1499 static int | |
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1500 re_mult_next(char *what) |
6203 | 1501 { |
1502 if (re_multi_type(peekchr()) == MULTI_MULT) | |
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1503 { |
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1504 semsg(_("E888: (NFA regexp) cannot repeat %s"), what); |
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1505 rc_did_emsg = TRUE; |
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1506 return FAIL; |
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1507 } |
6203 | 1508 return OK; |
1509 } | |
1510 | |
7 | 1511 typedef struct |
1512 { | |
1513 int a, b, c; | |
1514 } decomp_T; | |
1515 | |
1516 | |
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|
1517 // 0xfb20 - 0xfb4f |
297 | 1518 static decomp_T decomp_table[0xfb4f-0xfb20+1] = |
7 | 1519 { |
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1520 {0x5e2,0,0}, // 0xfb20 alt ayin |
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|
1521 {0x5d0,0,0}, // 0xfb21 alt alef |
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1522 {0x5d3,0,0}, // 0xfb22 alt dalet |
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|
1523 {0x5d4,0,0}, // 0xfb23 alt he |
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|
1524 {0x5db,0,0}, // 0xfb24 alt kaf |
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|
1525 {0x5dc,0,0}, // 0xfb25 alt lamed |
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|
1526 {0x5dd,0,0}, // 0xfb26 alt mem-sofit |
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1527 {0x5e8,0,0}, // 0xfb27 alt resh |
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|
1528 {0x5ea,0,0}, // 0xfb28 alt tav |
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|
1529 {'+', 0, 0}, // 0xfb29 alt plus |
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|
1530 {0x5e9, 0x5c1, 0}, // 0xfb2a shin+shin-dot |
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|
1531 {0x5e9, 0x5c2, 0}, // 0xfb2b shin+sin-dot |
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|
1532 {0x5e9, 0x5c1, 0x5bc}, // 0xfb2c shin+shin-dot+dagesh |
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|
1533 {0x5e9, 0x5c2, 0x5bc}, // 0xfb2d shin+sin-dot+dagesh |
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|
1534 {0x5d0, 0x5b7, 0}, // 0xfb2e alef+patah |
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1535 {0x5d0, 0x5b8, 0}, // 0xfb2f alef+qamats |
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1536 {0x5d0, 0x5b4, 0}, // 0xfb30 alef+hiriq |
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|
1537 {0x5d1, 0x5bc, 0}, // 0xfb31 bet+dagesh |
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|
1538 {0x5d2, 0x5bc, 0}, // 0xfb32 gimel+dagesh |
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|
1539 {0x5d3, 0x5bc, 0}, // 0xfb33 dalet+dagesh |
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|
1540 {0x5d4, 0x5bc, 0}, // 0xfb34 he+dagesh |
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1541 {0x5d5, 0x5bc, 0}, // 0xfb35 vav+dagesh |
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1542 {0x5d6, 0x5bc, 0}, // 0xfb36 zayin+dagesh |
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1543 {0xfb37, 0, 0}, // 0xfb37 -- UNUSED |
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1544 {0x5d8, 0x5bc, 0}, // 0xfb38 tet+dagesh |
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1545 {0x5d9, 0x5bc, 0}, // 0xfb39 yud+dagesh |
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|
1546 {0x5da, 0x5bc, 0}, // 0xfb3a kaf sofit+dagesh |
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|
1547 {0x5db, 0x5bc, 0}, // 0xfb3b kaf+dagesh |
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1548 {0x5dc, 0x5bc, 0}, // 0xfb3c lamed+dagesh |
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1549 {0xfb3d, 0, 0}, // 0xfb3d -- UNUSED |
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1550 {0x5de, 0x5bc, 0}, // 0xfb3e mem+dagesh |
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1551 {0xfb3f, 0, 0}, // 0xfb3f -- UNUSED |
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|
1552 {0x5e0, 0x5bc, 0}, // 0xfb40 nun+dagesh |
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|
1553 {0x5e1, 0x5bc, 0}, // 0xfb41 samech+dagesh |
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1554 {0xfb42, 0, 0}, // 0xfb42 -- UNUSED |
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1555 {0x5e3, 0x5bc, 0}, // 0xfb43 pe sofit+dagesh |
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|
1556 {0x5e4, 0x5bc,0}, // 0xfb44 pe+dagesh |
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1557 {0xfb45, 0, 0}, // 0xfb45 -- UNUSED |
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1558 {0x5e6, 0x5bc, 0}, // 0xfb46 tsadi+dagesh |
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|
1559 {0x5e7, 0x5bc, 0}, // 0xfb47 qof+dagesh |
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|
1560 {0x5e8, 0x5bc, 0}, // 0xfb48 resh+dagesh |
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|
1561 {0x5e9, 0x5bc, 0}, // 0xfb49 shin+dagesh |
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|
1562 {0x5ea, 0x5bc, 0}, // 0xfb4a tav+dagesh |
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1563 {0x5d5, 0x5b9, 0}, // 0xfb4b vav+holam |
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1564 {0x5d1, 0x5bf, 0}, // 0xfb4c bet+rafe |
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1565 {0x5db, 0x5bf, 0}, // 0xfb4d kaf+rafe |
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|
1566 {0x5e4, 0x5bf, 0}, // 0xfb4e pe+rafe |
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|
1567 {0x5d0, 0x5dc, 0} // 0xfb4f alef-lamed |
7 | 1568 }; |
1569 | |
1570 static void | |
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1571 mb_decompose(int c, int *c1, int *c2, int *c3) |
7 | 1572 { |
1573 decomp_T d; | |
1574 | |
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1575 if (c >= 0xfb20 && c <= 0xfb4f) |
7 | 1576 { |
1577 d = decomp_table[c - 0xfb20]; | |
1578 *c1 = d.a; | |
1579 *c2 = d.b; | |
1580 *c3 = d.c; | |
1581 } | |
1582 else | |
1583 { | |
1584 *c1 = c; | |
1585 *c2 = *c3 = 0; | |
1586 } | |
1587 } | |
1588 | |
1589 /* | |
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|
1590 * Compare two strings, ignore case if rex.reg_ic set. |
7 | 1591 * Return 0 if strings match, non-zero otherwise. |
1592 * Correct the length "*n" when composing characters are ignored. | |
1593 */ | |
1594 static int | |
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diff
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|
1595 cstrncmp(char_u *s1, char_u *s2, int *n) |
7 | 1596 { |
1597 int result; | |
1598 | |
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diff
changeset
|
1599 if (!rex.reg_ic) |
7 | 1600 result = STRNCMP(s1, s2, *n); |
1601 else | |
1602 result = MB_STRNICMP(s1, s2, *n); | |
1603 | |
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1604 // if it failed and it's utf8 and we want to combineignore: |
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Christian Brabandt <cb@256bit.org>
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diff
changeset
|
1605 if (result != 0 && enc_utf8 && rex.reg_icombine) |
7 | 1606 { |
1607 char_u *str1, *str2; | |
1608 int c1, c2, c11, c12; | |
1609 int junk; | |
1610 | |
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1611 // we have to handle the strcmp ourselves, since it is necessary to |
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|
1612 // deal with the composing characters by ignoring them: |
7 | 1613 str1 = s1; |
1614 str2 = s2; | |
1615 c1 = c2 = 0; | |
507 | 1616 while ((int)(str1 - s1) < *n) |
7 | 1617 { |
1618 c1 = mb_ptr2char_adv(&str1); | |
1619 c2 = mb_ptr2char_adv(&str2); | |
1620 | |
18019
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patch 8.1.2005: the regexp.c file is too big
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diff
changeset
|
1621 // Decompose the character if necessary, into 'base' characters. |
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patch 8.1.2005: the regexp.c file is too big
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|
1622 // Currently hard-coded for Hebrew, Arabic to be done... |
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diff
changeset
|
1623 if (c1 != c2 && (!rex.reg_ic || utf_fold(c1) != utf_fold(c2))) |
7 | 1624 { |
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diff
changeset
|
1625 // decomposition necessary? |
7 | 1626 mb_decompose(c1, &c11, &junk, &junk); |
1627 mb_decompose(c2, &c12, &junk, &junk); | |
1628 c1 = c11; | |
1629 c2 = c12; | |
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diff
changeset
|
1630 if (c11 != c12 |
d76ccdacb41e
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Christian Brabandt <cb@256bit.org>
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diff
changeset
|
1631 && (!rex.reg_ic || utf_fold(c11) != utf_fold(c12))) |
7 | 1632 break; |
1633 } | |
1634 } | |
1635 result = c2 - c1; | |
1636 if (result == 0) | |
1637 *n = (int)(str2 - s2); | |
1638 } | |
1639 | |
1640 return result; | |
1641 } | |
1642 | |
1643 /* | |
1644 * cstrchr: This function is used a lot for simple searches, keep it fast! | |
1645 */ | |
1646 static char_u * | |
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diff
changeset
|
1647 cstrchr(char_u *s, int c) |
7 | 1648 { |
1649 char_u *p; | |
1650 int cc; | |
1651 | |
15603
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patch 8.1.0809: too many #ifdefs
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diff
changeset
|
1652 if (!rex.reg_ic || (!enc_utf8 && mb_char2len(c) > 1)) |
7 | 1653 return vim_strchr(s, c); |
1654 | |
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1655 // tolower() and toupper() can be slow, comparing twice should be a lot |
d34ec6fe207d
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1656 // faster (esp. when using MS Visual C++!). |
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diff
changeset
|
1657 // For UTF-8 need to use folded case. |
7 | 1658 if (enc_utf8 && c > 0x80) |
1659 cc = utf_fold(c); | |
1660 else | |
1347 | 1661 if (MB_ISUPPER(c)) |
1662 cc = MB_TOLOWER(c); | |
1663 else if (MB_ISLOWER(c)) | |
1664 cc = MB_TOUPPER(c); | |
7 | 1665 else |
1666 return vim_strchr(s, c); | |
1667 | |
1668 if (has_mbyte) | |
1669 { | |
474 | 1670 for (p = s; *p != NUL; p += (*mb_ptr2len)(p)) |
7 | 1671 { |
1672 if (enc_utf8 && c > 0x80) | |
1673 { | |
1674 if (utf_fold(utf_ptr2char(p)) == cc) | |
1675 return p; | |
1676 } | |
1677 else if (*p == c || *p == cc) | |
1678 return p; | |
1679 } | |
1680 } | |
1681 else | |
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1682 // Faster version for when there are no multi-byte characters. |
7 | 1683 for (p = s; *p != NUL; ++p) |
1684 if (*p == c || *p == cc) | |
1685 return p; | |
1686 | |
1687 return NULL; | |
1688 } | |
1689 | |
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1690 //////////////////////////////////////////////////////////////// |
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1691 // regsub stuff // |
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1692 //////////////////////////////////////////////////////////////// |
7 | 1693 |
1694 /* | |
1695 * We should define ftpr as a pointer to a function returning a pointer to | |
1696 * a function returning a pointer to a function ... | |
1697 * This is impossible, so we declare a pointer to a function returning a | |
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1698 * void pointer. This should work for all compilers. |
7 | 1699 */ |
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1700 typedef void (*(*fptr_T)(int *, int)); |
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1701 |
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1702 static int vim_regsub_both(char_u *source, typval_T *expr, char_u *dest, int copy, int magic, int backslash); |
7 | 1703 |
772 | 1704 static fptr_T |
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1705 do_upper(int *d, int c) |
7 | 1706 { |
772 | 1707 *d = MB_TOUPPER(c); |
1708 | |
1709 return (fptr_T)NULL; | |
7 | 1710 } |
1711 | |
772 | 1712 static fptr_T |
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1713 do_Upper(int *d, int c) |
7 | 1714 { |
772 | 1715 *d = MB_TOUPPER(c); |
1716 | |
1717 return (fptr_T)do_Upper; | |
1718 } | |
1719 | |
1720 static fptr_T | |
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1721 do_lower(int *d, int c) |
772 | 1722 { |
1723 *d = MB_TOLOWER(c); | |
1724 | |
1725 return (fptr_T)NULL; | |
1726 } | |
1727 | |
1728 static fptr_T | |
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1729 do_Lower(int *d, int c) |
772 | 1730 { |
1731 *d = MB_TOLOWER(c); | |
1732 | |
1733 return (fptr_T)do_Lower; | |
7 | 1734 } |
1735 | |
1736 /* | |
1737 * regtilde(): Replace tildes in the pattern by the old pattern. | |
1738 * | |
1739 * Short explanation of the tilde: It stands for the previous replacement | |
1740 * pattern. If that previous pattern also contains a ~ we should go back a | |
1741 * step further... But we insert the previous pattern into the current one | |
1742 * and remember that. | |
772 | 1743 * This still does not handle the case where "magic" changes. So require the |
1744 * user to keep his hands off of "magic". | |
7 | 1745 * |
1746 * The tildes are parsed once before the first call to vim_regsub(). | |
1747 */ | |
1748 char_u * | |
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1749 regtilde(char_u *source, int magic) |
7 | 1750 { |
1751 char_u *newsub = source; | |
1752 char_u *tmpsub; | |
1753 char_u *p; | |
1754 int len; | |
1755 int prevlen; | |
1756 | |
1757 for (p = newsub; *p; ++p) | |
1758 { | |
1759 if ((*p == '~' && magic) || (*p == '\\' && *(p + 1) == '~' && !magic)) | |
1760 { | |
1761 if (reg_prev_sub != NULL) | |
1762 { | |
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1763 // length = len(newsub) - 1 + len(prev_sub) + 1 |
7 | 1764 prevlen = (int)STRLEN(reg_prev_sub); |
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1765 tmpsub = alloc(STRLEN(newsub) + prevlen); |
7 | 1766 if (tmpsub != NULL) |
1767 { | |
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1768 // copy prefix |
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1769 len = (int)(p - newsub); // not including ~ |
7 | 1770 mch_memmove(tmpsub, newsub, (size_t)len); |
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1771 // interpret tilde |
7 | 1772 mch_memmove(tmpsub + len, reg_prev_sub, (size_t)prevlen); |
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1773 // copy postfix |
7 | 1774 if (!magic) |
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1775 ++p; // back off backslash |
7 | 1776 STRCPY(tmpsub + len + prevlen, p + 1); |
1777 | |
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1778 if (newsub != source) // already allocated newsub |
7 | 1779 vim_free(newsub); |
1780 newsub = tmpsub; | |
1781 p = newsub + len + prevlen; | |
1782 } | |
1783 } | |
1784 else if (magic) | |
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1785 STRMOVE(p, p + 1); // remove '~' |
7 | 1786 else |
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1787 STRMOVE(p, p + 2); // remove '\~' |
7 | 1788 --p; |
1789 } | |
1790 else | |
1791 { | |
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1792 if (*p == '\\' && p[1]) // skip escaped characters |
7 | 1793 ++p; |
1794 if (has_mbyte) | |
474 | 1795 p += (*mb_ptr2len)(p) - 1; |
7 | 1796 } |
1797 } | |
1798 | |
1799 vim_free(reg_prev_sub); | |
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1800 if (newsub != source) // newsub was allocated, just keep it |
7 | 1801 reg_prev_sub = newsub; |
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1802 else // no ~ found, need to save newsub |
7 | 1803 reg_prev_sub = vim_strsave(newsub); |
1804 return newsub; | |
1805 } | |
1806 | |
1807 #ifdef FEAT_EVAL | |
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1808 static int can_f_submatch = FALSE; // TRUE when submatch() can be used |
7 | 1809 |
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1810 // These pointers are used for reg_submatch(). Needed for when the |
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1811 // substitution string is an expression that contains a call to substitute() |
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1812 // and submatch(). |
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1813 typedef struct { |
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1814 regmatch_T *sm_match; |
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1815 regmmatch_T *sm_mmatch; |
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1816 linenr_T sm_firstlnum; |
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1817 linenr_T sm_maxline; |
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1818 int sm_line_lbr; |
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1819 } regsubmatch_T; |
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1820 |
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1821 static regsubmatch_T rsm; // can only be used when can_f_submatch is TRUE |
7 | 1822 #endif |
1823 | |
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1824 #ifdef FEAT_EVAL |
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1825 |
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1826 /* |
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1827 * Put the submatches in "argv[argskip]" which is a list passed into |
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1828 * call_func() by vim_regsub_both(). |
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1829 */ |
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1830 static int |
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1831 fill_submatch_list(int argc UNUSED, typval_T *argv, int argskip, int argcount) |
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1832 { |
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1833 listitem_T *li; |
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1834 int i; |
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1835 char_u *s; |
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1836 typval_T *listarg = argv + argskip; |
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1837 |
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1838 if (argcount == argskip) |
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1839 // called function doesn't take a submatches argument |
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1840 return argskip; |
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1841 |
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1842 // Relies on sl_list to be the first item in staticList10_T. |
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1843 init_static_list((staticList10_T *)(listarg->vval.v_list)); |
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1844 |
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1845 // There are always 10 list items in staticList10_T. |
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1846 li = listarg->vval.v_list->lv_first; |
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1847 for (i = 0; i < 10; ++i) |
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1848 { |
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1849 s = rsm.sm_match->startp[i]; |
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1850 if (s == NULL || rsm.sm_match->endp[i] == NULL) |
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1851 s = NULL; |
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1852 else |
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1853 s = vim_strnsave(s, rsm.sm_match->endp[i] - s); |
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1854 li->li_tv.v_type = VAR_STRING; |
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1855 li->li_tv.vval.v_string = s; |
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1856 li = li->li_next; |
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1857 } |
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1858 return argskip + 1; |
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1859 } |
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1860 |
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1861 static void |
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1862 clear_submatch_list(staticList10_T *sl) |
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1863 { |
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1864 int i; |
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1865 |
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1866 for (i = 0; i < 10; ++i) |
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1867 vim_free(sl->sl_items[i].li_tv.vval.v_string); |
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1868 } |
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1869 #endif |
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1870 |
7 | 1871 /* |
1872 * vim_regsub() - perform substitutions after a vim_regexec() or | |
1873 * vim_regexec_multi() match. | |
1874 * | |
1875 * If "copy" is TRUE really copy into "dest". | |
1876 * If "copy" is FALSE nothing is copied, this is just to find out the length | |
1877 * of the result. | |
1878 * | |
1879 * If "backslash" is TRUE, a backslash will be removed later, need to double | |
1880 * them to keep them, and insert a backslash before a CR to avoid it being | |
1881 * replaced with a line break later. | |
1882 * | |
1883 * Note: The matched text must not change between the call of | |
1884 * vim_regexec()/vim_regexec_multi() and vim_regsub()! It would make the back | |
1885 * references invalid! | |
1886 * | |
1887 * Returns the size of the replacement, including terminating NUL. | |
1888 */ | |
1889 int | |
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1890 vim_regsub( |
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1891 regmatch_T *rmp, |
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1892 char_u *source, |
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1893 typval_T *expr, |
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1894 char_u *dest, |
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1895 int copy, |
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1896 int magic, |
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1897 int backslash) |
7 | 1898 { |
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1899 int result; |
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1900 regexec_T rex_save; |
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1901 int rex_in_use_save = rex_in_use; |
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1902 |
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1903 if (rex_in_use) |
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1904 // Being called recursively, save the state. |
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1905 rex_save = rex; |
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1906 rex_in_use = TRUE; |
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1907 |
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1908 rex.reg_match = rmp; |
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1909 rex.reg_mmatch = NULL; |
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1910 rex.reg_maxline = 0; |
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1911 rex.reg_buf = curbuf; |
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1912 rex.reg_line_lbr = TRUE; |
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1913 result = vim_regsub_both(source, expr, dest, copy, magic, backslash); |
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1914 |
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1915 rex_in_use = rex_in_use_save; |
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1916 if (rex_in_use) |
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1917 rex = rex_save; |
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1918 |
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1919 return result; |
7 | 1920 } |
1921 | |
1922 int | |
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1923 vim_regsub_multi( |
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1924 regmmatch_T *rmp, |
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1925 linenr_T lnum, |
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1926 char_u *source, |
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1927 char_u *dest, |
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1928 int copy, |
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1929 int magic, |
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1930 int backslash) |
7 | 1931 { |
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1932 int result; |
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1933 regexec_T rex_save; |
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1934 int rex_in_use_save = rex_in_use; |
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1935 |
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1936 if (rex_in_use) |
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1937 // Being called recursively, save the state. |
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1938 rex_save = rex; |
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1939 rex_in_use = TRUE; |
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1940 |
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1941 rex.reg_match = NULL; |
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1942 rex.reg_mmatch = rmp; |
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1943 rex.reg_buf = curbuf; // always works on the current buffer! |
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1944 rex.reg_firstlnum = lnum; |
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1945 rex.reg_maxline = curbuf->b_ml.ml_line_count - lnum; |
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1946 rex.reg_line_lbr = FALSE; |
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1947 result = vim_regsub_both(source, NULL, dest, copy, magic, backslash); |
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1948 |
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1949 rex_in_use = rex_in_use_save; |
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1950 if (rex_in_use) |
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1951 rex = rex_save; |
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1952 |
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1953 return result; |
7 | 1954 } |
1955 | |
1956 static int | |
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1957 vim_regsub_both( |
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1958 char_u *source, |
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1959 typval_T *expr, |
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1960 char_u *dest, |
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1961 int copy, |
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1962 int magic, |
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1963 int backslash) |
7 | 1964 { |
1965 char_u *src; | |
1966 char_u *dst; | |
1967 char_u *s; | |
1968 int c; | |
772 | 1969 int cc; |
7 | 1970 int no = -1; |
4244 | 1971 fptr_T func_all = (fptr_T)NULL; |
1972 fptr_T func_one = (fptr_T)NULL; | |
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1973 linenr_T clnum = 0; // init for GCC |
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1974 int len = 0; // init for GCC |
7 | 1975 #ifdef FEAT_EVAL |
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1976 static char_u *eval_result = NULL; |
7 | 1977 #endif |
1978 | |
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1979 // Be paranoid... |
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1980 if ((source == NULL && expr == NULL) || dest == NULL) |
7 | 1981 { |
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1982 emsg(_(e_null_argument)); |
7 | 1983 return 0; |
1984 } | |
1985 if (prog_magic_wrong()) | |
1986 return 0; | |
1987 src = source; | |
1988 dst = dest; | |
1989 | |
1990 /* | |
1991 * When the substitute part starts with "\=" evaluate it as an expression. | |
1992 */ | |
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1993 if (expr != NULL || (source[0] == '\\' && source[1] == '=')) |
7 | 1994 { |
1995 #ifdef FEAT_EVAL | |
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1996 // To make sure that the length doesn't change between checking the |
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1997 // length and copying the string, and to speed up things, the |
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1998 // resulting string is saved from the call with "copy" == FALSE to the |
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1999 // call with "copy" == TRUE. |
7 | 2000 if (copy) |
2001 { | |
2002 if (eval_result != NULL) | |
2003 { | |
2004 STRCPY(dest, eval_result); | |
2005 dst += STRLEN(eval_result); | |
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2006 VIM_CLEAR(eval_result); |
7 | 2007 } |
2008 } | |
2009 else | |
2010 { | |
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2011 int prev_can_f_submatch = can_f_submatch; |
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2012 regsubmatch_T rsm_save; |
7 | 2013 |
2014 vim_free(eval_result); | |
2015 | |
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2016 // The expression may contain substitute(), which calls us |
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2017 // recursively. Make sure submatch() gets the text from the first |
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2018 // level. |
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2019 if (can_f_submatch) |
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2020 rsm_save = rsm; |
7 | 2021 can_f_submatch = TRUE; |
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2022 rsm.sm_match = rex.reg_match; |
d76ccdacb41e
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|
2023 rsm.sm_mmatch = rex.reg_mmatch; |
d76ccdacb41e
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diff
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|
2024 rsm.sm_firstlnum = rex.reg_firstlnum; |
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diff
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|
2025 rsm.sm_maxline = rex.reg_maxline; |
d76ccdacb41e
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10187
diff
changeset
|
2026 rsm.sm_line_lbr = rex.reg_line_lbr; |
7 | 2027 |
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|
2028 if (expr != NULL) |
bf204ab1ce7d
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|
2029 { |
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9589
diff
changeset
|
2030 typval_T argv[2]; |
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diff
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|
2031 char_u buf[NUMBUFLEN]; |
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diff
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|
2032 typval_T rettv; |
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|
2033 staticList10_T matchList; |
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|
2034 funcexe_T funcexe; |
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|
2035 |
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diff
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2036 rettv.v_type = VAR_STRING; |
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2037 rettv.vval.v_string = NULL; |
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2038 argv[0].v_type = VAR_LIST; |
d76ccdacb41e
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|
2039 argv[0].vval.v_list = &matchList.sl_list; |
d76ccdacb41e
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diff
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|
2040 matchList.sl_list.lv_len = 0; |
20007
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patch 8.2.0559: clearing a struct is verbose
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|
2041 CLEAR_FIELD(funcexe); |
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|
2042 funcexe.argv_func = fill_submatch_list; |
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patch 8.1.1800: function call functions have too many arguments
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2043 funcexe.evaluate = TRUE; |
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2044 if (expr->v_type == VAR_FUNC) |
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2045 { |
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|
2046 s = expr->vval.v_string; |
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|
2047 call_func(s, -1, &rettv, 1, argv, &funcexe); |
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2048 } |
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diff
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|
2049 else if (expr->v_type == VAR_PARTIAL) |
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2050 { |
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2051 partial_T *partial = expr->vval.v_partial; |
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2052 |
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2053 s = partial_name(partial); |
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2054 funcexe.partial = partial; |
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changeset
|
2055 call_func(s, -1, &rettv, 1, argv, &funcexe); |
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|
2056 } |
10245
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diff
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|
2057 if (matchList.sl_list.lv_len > 0) |
18576
e9675870c480
patch 8.1.2282: crash when passing many arguments through a partial
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|
2058 // fill_submatch_list() was called |
10245
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|
2059 clear_submatch_list(&matchList); |
d76ccdacb41e
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2060 |
18576
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|
2061 if (rettv.v_type == VAR_UNKNOWN) |
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2062 // something failed, no need to report another error |
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patch 8.1.2282: crash when passing many arguments through a partial
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2063 eval_result = NULL; |
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patch 8.1.2282: crash when passing many arguments through a partial
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2064 else |
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2065 { |
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2066 eval_result = tv_get_string_buf_chk(&rettv, buf); |
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|
2067 if (eval_result != NULL) |
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|
2068 eval_result = vim_strsave(eval_result); |
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|
2069 } |
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diff
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|
2070 clear_tv(&rettv); |
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2071 } |
24488
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patch 8.2.2784: Vim9: cannot use =expr in :substitute
Bram Moolenaar <Bram@vim.org>
parents:
23505
diff
changeset
|
2072 else if (substitute_instr != NULL) |
f293bb501b30
patch 8.2.2784: Vim9: cannot use =expr in :substitute
Bram Moolenaar <Bram@vim.org>
parents:
23505
diff
changeset
|
2073 // Execute instructions from ISN_SUBSTITUTE. |
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patch 8.2.2784: Vim9: cannot use =expr in :substitute
Bram Moolenaar <Bram@vim.org>
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changeset
|
2074 eval_result = exe_substitute_instr(); |
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|
2075 else |
20996
3af71cbcfdbe
patch 8.2.1049: Vim9: leaking memory when using continuation line
Bram Moolenaar <Bram@vim.org>
parents:
20830
diff
changeset
|
2076 eval_result = eval_to_string(source + 2, TRUE); |
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|
2077 |
7 | 2078 if (eval_result != NULL) |
2079 { | |
2125
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|
2080 int had_backslash = FALSE; |
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Bram Moolenaar <bram@zimbu.org>
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2012
diff
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|
2081 |
11127
506f5d8b7d8b
patch 8.0.0451: some macros are in lower case
Christian Brabandt <cb@256bit.org>
parents:
11121
diff
changeset
|
2082 for (s = eval_result; *s != NUL; MB_PTR_ADV(s)) |
7 | 2083 { |
18812
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patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
2084 // Change NL to CR, so that it becomes a line break, |
d34ec6fe207d
patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
2085 // unless called from vim_regexec_nl(). |
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patch 8.1.2394: using old C style comments
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parents:
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diff
changeset
|
2086 // Skip over a backslashed character. |
10245
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diff
changeset
|
2087 if (*s == NL && !rsm.sm_line_lbr) |
7 | 2088 *s = CAR; |
2089 else if (*s == '\\' && s[1] != NUL) | |
2125
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diff
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|
2090 { |
7 | 2091 ++s; |
2173 | 2092 /* Change NL to CR here too, so that this works: |
2093 * :s/abc\\\ndef/\="aaa\\\nbbb"/ on text: | |
2094 * abc\ | |
2095 * def | |
2904 | 2096 * Not when called from vim_regexec_nl(). |
2173 | 2097 */ |
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diff
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|
2098 if (*s == NL && !rsm.sm_line_lbr) |
2173 | 2099 *s = CAR; |
2125
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diff
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|
2100 had_backslash = TRUE; |
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diff
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|
2101 } |
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|
2102 } |
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diff
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|
2103 if (had_backslash && backslash) |
b8744d1982d1
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2012
diff
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|
2104 { |
18812
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|
2105 // Backslashes will be consumed, need to double them. |
2125
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2012
diff
changeset
|
2106 s = vim_strsave_escaped(eval_result, (char_u *)"\\"); |
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diff
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|
2107 if (s != NULL) |
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diff
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|
2108 { |
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diff
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|
2109 vim_free(eval_result); |
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|
2110 eval_result = s; |
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diff
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|
2111 } |
7 | 2112 } |
2113 | |
2114 dst += STRLEN(eval_result); | |
2115 } | |
2116 | |
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|
2117 can_f_submatch = prev_can_f_submatch; |
d76ccdacb41e
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changeset
|
2118 if (can_f_submatch) |
d76ccdacb41e
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diff
changeset
|
2119 rsm = rsm_save; |
7 | 2120 } |
2121 #endif | |
2122 } | |
2123 else | |
2124 while ((c = *src++) != NUL) | |
2125 { | |
2126 if (c == '&' && magic) | |
2127 no = 0; | |
2128 else if (c == '\\' && *src != NUL) | |
2129 { | |
2130 if (*src == '&' && !magic) | |
2131 { | |
2132 ++src; | |
2133 no = 0; | |
2134 } | |
2135 else if ('0' <= *src && *src <= '9') | |
2136 { | |
2137 no = *src++ - '0'; | |
2138 } | |
2139 else if (vim_strchr((char_u *)"uUlLeE", *src)) | |
2140 { | |
2141 switch (*src++) | |
2142 { | |
4244 | 2143 case 'u': func_one = (fptr_T)do_upper; |
7 | 2144 continue; |
4244 | 2145 case 'U': func_all = (fptr_T)do_Upper; |
7 | 2146 continue; |
4244 | 2147 case 'l': func_one = (fptr_T)do_lower; |
7 | 2148 continue; |
4244 | 2149 case 'L': func_all = (fptr_T)do_Lower; |
7 | 2150 continue; |
2151 case 'e': | |
4244 | 2152 case 'E': func_one = func_all = (fptr_T)NULL; |
7 | 2153 continue; |
2154 } | |
2155 } | |
2156 } | |
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|
2157 if (no < 0) // Ordinary character. |
7 | 2158 { |
798 | 2159 if (c == K_SPECIAL && src[0] != NUL && src[1] != NUL) |
2160 { | |
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changeset
|
2161 // Copy a special key as-is. |
798 | 2162 if (copy) |
2163 { | |
2164 *dst++ = c; | |
2165 *dst++ = *src++; | |
2166 *dst++ = *src++; | |
2167 } | |
2168 else | |
2169 { | |
2170 dst += 3; | |
2171 src += 2; | |
2172 } | |
2173 continue; | |
2174 } | |
2175 | |
7 | 2176 if (c == '\\' && *src != NUL) |
2177 { | |
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|
2178 // Check for abbreviations -- webb |
7 | 2179 switch (*src) |
2180 { | |
2181 case 'r': c = CAR; ++src; break; | |
2182 case 'n': c = NL; ++src; break; | |
2183 case 't': c = TAB; ++src; break; | |
18812
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|
2184 // Oh no! \e already has meaning in subst pat :-( |
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changeset
|
2185 // case 'e': c = ESC; ++src; break; |
7 | 2186 case 'b': c = Ctrl_H; ++src; break; |
2187 | |
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|
2188 // If "backslash" is TRUE the backslash will be removed |
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changeset
|
2189 // later. Used to insert a literal CR. |
7 | 2190 default: if (backslash) |
2191 { | |
2192 if (copy) | |
2193 *dst = '\\'; | |
2194 ++dst; | |
2195 } | |
2196 c = *src++; | |
2197 } | |
2198 } | |
798 | 2199 else if (has_mbyte) |
2200 c = mb_ptr2char(src - 1); | |
7 | 2201 |
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|
2202 // Write to buffer, if copy is set. |
4244 | 2203 if (func_one != (fptr_T)NULL) |
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|
2204 // Turbo C complains without the typecast |
4244 | 2205 func_one = (fptr_T)(func_one(&cc, c)); |
2206 else if (func_all != (fptr_T)NULL) | |
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|
2207 // Turbo C complains without the typecast |
4244 | 2208 func_all = (fptr_T)(func_all(&cc, c)); |
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|
2209 else // just copy |
772 | 2210 cc = c; |
2211 | |
2212 if (has_mbyte) | |
7 | 2213 { |
2307
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|
2214 int totlen = mb_ptr2len(src - 1); |
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|
2215 |
7 | 2216 if (copy) |
772 | 2217 mb_char2bytes(cc, dst); |
2218 dst += mb_char2len(cc) - 1; | |
2307
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|
2219 if (enc_utf8) |
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|
2220 { |
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|
2221 int clen = utf_ptr2len(src - 1); |
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2222 |
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2223 // If the character length is shorter than "totlen", there |
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|
2224 // are composing characters; copy them as-is. |
2307
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2225 if (clen < totlen) |
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2226 { |
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|
2227 if (copy) |
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|
2228 mch_memmove(dst + 1, src - 1 + clen, |
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|
2229 (size_t)(totlen - clen)); |
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2230 dst += totlen - clen; |
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|
2231 } |
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|
2232 } |
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|
2233 src += totlen - 1; |
7 | 2234 } |
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|
2235 else if (copy) |
772 | 2236 *dst = cc; |
7 | 2237 dst++; |
2238 } | |
2239 else | |
2240 { | |
2241 if (REG_MULTI) | |
2242 { | |
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2243 clnum = rex.reg_mmatch->startpos[no].lnum; |
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|
2244 if (clnum < 0 || rex.reg_mmatch->endpos[no].lnum < 0) |
7 | 2245 s = NULL; |
2246 else | |
2247 { | |
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2248 s = reg_getline(clnum) + rex.reg_mmatch->startpos[no].col; |
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|
2249 if (rex.reg_mmatch->endpos[no].lnum == clnum) |
d76ccdacb41e
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|
2250 len = rex.reg_mmatch->endpos[no].col |
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|
2251 - rex.reg_mmatch->startpos[no].col; |
7 | 2252 else |
2253 len = (int)STRLEN(s); | |
2254 } | |
2255 } | |
2256 else | |
2257 { | |
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|
2258 s = rex.reg_match->startp[no]; |
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diff
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|
2259 if (rex.reg_match->endp[no] == NULL) |
7 | 2260 s = NULL; |
2261 else | |
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diff
changeset
|
2262 len = (int)(rex.reg_match->endp[no] - s); |
7 | 2263 } |
2264 if (s != NULL) | |
2265 { | |
2266 for (;;) | |
2267 { | |
2268 if (len == 0) | |
2269 { | |
2270 if (REG_MULTI) | |
2271 { | |
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diff
changeset
|
2272 if (rex.reg_mmatch->endpos[no].lnum == clnum) |
7 | 2273 break; |
2274 if (copy) | |
2275 *dst = CAR; | |
2276 ++dst; | |
2277 s = reg_getline(++clnum); | |
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diff
changeset
|
2278 if (rex.reg_mmatch->endpos[no].lnum == clnum) |
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diff
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|
2279 len = rex.reg_mmatch->endpos[no].col; |
7 | 2280 else |
2281 len = (int)STRLEN(s); | |
2282 } | |
2283 else | |
2284 break; | |
2285 } | |
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|
2286 else if (*s == NUL) // we hit NUL. |
7 | 2287 { |
2288 if (copy) | |
25306
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changeset
|
2289 iemsg(_(e_damaged_match_string)); |
7 | 2290 goto exit; |
2291 } | |
2292 else | |
2293 { | |
2294 if (backslash && (*s == CAR || *s == '\\')) | |
2295 { | |
2296 /* | |
2297 * Insert a backslash in front of a CR, otherwise | |
2298 * it will be replaced by a line break. | |
2299 * Number of backslashes will be halved later, | |
2300 * double them here. | |
2301 */ | |
2302 if (copy) | |
2303 { | |
2304 dst[0] = '\\'; | |
2305 dst[1] = *s; | |
2306 } | |
2307 dst += 2; | |
2308 } | |
2309 else | |
2310 { | |
772 | 2311 if (has_mbyte) |
2312 c = mb_ptr2char(s); | |
2313 else | |
2314 c = *s; | |
2315 | |
4244 | 2316 if (func_one != (fptr_T)NULL) |
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|
2317 // Turbo C complains without the typecast |
4244 | 2318 func_one = (fptr_T)(func_one(&cc, c)); |
2319 else if (func_all != (fptr_T)NULL) | |
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|
2320 // Turbo C complains without the typecast |
4244 | 2321 func_all = (fptr_T)(func_all(&cc, c)); |
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|
2322 else // just copy |
772 | 2323 cc = c; |
2324 | |
2325 if (has_mbyte) | |
7 | 2326 { |
1332 | 2327 int l; |
2328 | |
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2329 // Copy composing characters separately, one |
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changeset
|
2330 // at a time. |
1332 | 2331 if (enc_utf8) |
2332 l = utf_ptr2len(s) - 1; | |
2333 else | |
2334 l = mb_ptr2len(s) - 1; | |
772 | 2335 |
2336 s += l; | |
2337 len -= l; | |
2338 if (copy) | |
2339 mb_char2bytes(cc, dst); | |
2340 dst += mb_char2len(cc) - 1; | |
7 | 2341 } |
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|
2342 else if (copy) |
772 | 2343 *dst = cc; |
2344 dst++; | |
7 | 2345 } |
772 | 2346 |
7 | 2347 ++s; |
2348 --len; | |
2349 } | |
2350 } | |
2351 } | |
2352 no = -1; | |
2353 } | |
2354 } | |
2355 if (copy) | |
2356 *dst = NUL; | |
2357 | |
2358 exit: | |
2359 return (int)((dst - dest) + 1); | |
2360 } | |
2361 | |
2362 #ifdef FEAT_EVAL | |
2363 /* | |
2011 | 2364 * Call reg_getline() with the line numbers from the submatch. If a |
2365 * substitute() was used the reg_maxline and other values have been | |
2366 * overwritten. | |
2367 */ | |
2368 static char_u * | |
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diff
changeset
|
2369 reg_getline_submatch(linenr_T lnum) |
2011 | 2370 { |
2371 char_u *s; | |
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diff
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|
2372 linenr_T save_first = rex.reg_firstlnum; |
d76ccdacb41e
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|
2373 linenr_T save_max = rex.reg_maxline; |
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|
2374 |
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diff
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|
2375 rex.reg_firstlnum = rsm.sm_firstlnum; |
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diff
changeset
|
2376 rex.reg_maxline = rsm.sm_maxline; |
2011 | 2377 |
2378 s = reg_getline(lnum); | |
2379 | |
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changeset
|
2380 rex.reg_firstlnum = save_first; |
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diff
changeset
|
2381 rex.reg_maxline = save_max; |
2011 | 2382 return s; |
2383 } | |
2384 | |
2385 /* | |
1209 | 2386 * Used for the submatch() function: get the string from the n'th submatch in |
7 | 2387 * allocated memory. |
2388 * Returns NULL when not in a ":s" command and for a non-existing submatch. | |
2389 */ | |
2390 char_u * | |
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diff
changeset
|
2391 reg_submatch(int no) |
7 | 2392 { |
2393 char_u *retval = NULL; | |
2394 char_u *s; | |
2395 int len; | |
2396 int round; | |
2397 linenr_T lnum; | |
2398 | |
840 | 2399 if (!can_f_submatch || no < 0) |
7 | 2400 return NULL; |
2401 | |
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diff
changeset
|
2402 if (rsm.sm_match == NULL) |
7 | 2403 { |
2404 /* | |
2405 * First round: compute the length and allocate memory. | |
2406 * Second round: copy the text. | |
2407 */ | |
2408 for (round = 1; round <= 2; ++round) | |
2409 { | |
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changeset
|
2410 lnum = rsm.sm_mmatch->startpos[no].lnum; |
d76ccdacb41e
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|
2411 if (lnum < 0 || rsm.sm_mmatch->endpos[no].lnum < 0) |
7 | 2412 return NULL; |
2413 | |
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|
2414 s = reg_getline_submatch(lnum); |
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changeset
|
2415 if (s == NULL) // anti-crash check, cannot happen? |
7 | 2416 break; |
16040
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patch 8.1.1025: checking NULL pointer after addition
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|
2417 s += rsm.sm_mmatch->startpos[no].col; |
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|
2418 if (rsm.sm_mmatch->endpos[no].lnum == lnum) |
7 | 2419 { |
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2420 // Within one line: take form start to end col. |
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|
2421 len = rsm.sm_mmatch->endpos[no].col |
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diff
changeset
|
2422 - rsm.sm_mmatch->startpos[no].col; |
7 | 2423 if (round == 2) |
418 | 2424 vim_strncpy(retval, s, len); |
7 | 2425 ++len; |
2426 } | |
2427 else | |
2428 { | |
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changeset
|
2429 // Multiple lines: take start line from start col, middle |
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|
2430 // lines completely and end line up to end col. |
7 | 2431 len = (int)STRLEN(s); |
2432 if (round == 2) | |
2433 { | |
2434 STRCPY(retval, s); | |
2435 retval[len] = '\n'; | |
2436 } | |
2437 ++len; | |
2438 ++lnum; | |
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changeset
|
2439 while (lnum < rsm.sm_mmatch->endpos[no].lnum) |
7 | 2440 { |
2011 | 2441 s = reg_getline_submatch(lnum++); |
7 | 2442 if (round == 2) |
2443 STRCPY(retval + len, s); | |
2444 len += (int)STRLEN(s); | |
2445 if (round == 2) | |
2446 retval[len] = '\n'; | |
2447 ++len; | |
2448 } | |
2449 if (round == 2) | |
2011 | 2450 STRNCPY(retval + len, reg_getline_submatch(lnum), |
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|
2451 rsm.sm_mmatch->endpos[no].col); |
d76ccdacb41e
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changeset
|
2452 len += rsm.sm_mmatch->endpos[no].col; |
7 | 2453 if (round == 2) |
2454 retval[len] = NUL; | |
2455 ++len; | |
2456 } | |
2457 | |
840 | 2458 if (retval == NULL) |
7 | 2459 { |
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Bram Moolenaar <Bram@vim.org>
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changeset
|
2460 retval = alloc(len); |
840 | 2461 if (retval == NULL) |
7 | 2462 return NULL; |
2463 } | |
2464 } | |
2465 } | |
2466 else | |
2467 { | |
10245
d76ccdacb41e
commit https://github.com/vim/vim/commit/6100d02aab7c8294b581cb299250eea164b50e9d
Christian Brabandt <cb@256bit.org>
parents:
10187
diff
changeset
|
2468 s = rsm.sm_match->startp[no]; |
d76ccdacb41e
commit https://github.com/vim/vim/commit/6100d02aab7c8294b581cb299250eea164b50e9d
Christian Brabandt <cb@256bit.org>
parents:
10187
diff
changeset
|
2469 if (s == NULL || rsm.sm_match->endp[no] == NULL) |
7 | 2470 retval = NULL; |
2471 else | |
20830
9064044fd4f6
patch 8.2.0967: unnecessary type casts for vim_strnsave()
Bram Moolenaar <Bram@vim.org>
parents:
20113
diff
changeset
|
2472 retval = vim_strnsave(s, rsm.sm_match->endp[no] - s); |
7 | 2473 } |
2474 | |
2475 return retval; | |
2476 } | |
5794 | 2477 |
2478 /* | |
2479 * Used for the submatch() function with the optional non-zero argument: get | |
2480 * the list of strings from the n'th submatch in allocated memory with NULs | |
2481 * represented in NLs. | |
2482 * Returns a list of allocated strings. Returns NULL when not in a ":s" | |
2483 * command, for a non-existing submatch and for any error. | |
2484 */ | |
2485 list_T * | |
7833
c079097365f3
commit https://github.com/vim/vim/commit/055409764ca5f7978d4c399d2c440af0ce971c4f
Christian Brabandt <cb@256bit.org>
parents:
7807
diff
changeset
|
2486 reg_submatch_list(int no) |
5794 | 2487 { |
2488 char_u *s; | |
2489 linenr_T slnum; | |
2490 linenr_T elnum; | |
2491 colnr_T scol; | |
2492 colnr_T ecol; | |
2493 int i; | |
2494 list_T *list; | |
2495 int error = FALSE; | |
2496 | |
2497 if (!can_f_submatch || no < 0) | |
2498 return NULL; | |
2499 | |
10245
d76ccdacb41e
commit https://github.com/vim/vim/commit/6100d02aab7c8294b581cb299250eea164b50e9d
Christian Brabandt <cb@256bit.org>
parents:
10187
diff
changeset
|
2500 if (rsm.sm_match == NULL) |
5794 | 2501 { |
10245
d76ccdacb41e
commit https://github.com/vim/vim/commit/6100d02aab7c8294b581cb299250eea164b50e9d
Christian Brabandt <cb@256bit.org>
parents:
10187
diff
changeset
|
2502 slnum = rsm.sm_mmatch->startpos[no].lnum; |
d76ccdacb41e
commit https://github.com/vim/vim/commit/6100d02aab7c8294b581cb299250eea164b50e9d
Christian Brabandt <cb@256bit.org>
parents:
10187
diff
changeset
|
2503 elnum = rsm.sm_mmatch->endpos[no].lnum; |
5794 | 2504 if (slnum < 0 || elnum < 0) |
2505 return NULL; | |
2506 | |
10245
d76ccdacb41e
commit https://github.com/vim/vim/commit/6100d02aab7c8294b581cb299250eea164b50e9d
Christian Brabandt <cb@256bit.org>
parents:
10187
diff
changeset
|
2507 scol = rsm.sm_mmatch->startpos[no].col; |
d76ccdacb41e
commit https://github.com/vim/vim/commit/6100d02aab7c8294b581cb299250eea164b50e9d
Christian Brabandt <cb@256bit.org>
parents:
10187
diff
changeset
|
2508 ecol = rsm.sm_mmatch->endpos[no].col; |
5794 | 2509 |
2510 list = list_alloc(); | |
2511 if (list == NULL) | |
2512 return NULL; | |
2513 | |
2514 s = reg_getline_submatch(slnum) + scol; | |
2515 if (slnum == elnum) | |
2516 { | |
2517 if (list_append_string(list, s, ecol - scol) == FAIL) | |
2518 error = TRUE; | |
2519 } | |
2520 else | |
2521 { | |
2522 if (list_append_string(list, s, -1) == FAIL) | |
2523 error = TRUE; | |
2524 for (i = 1; i < elnum - slnum; i++) | |
2525 { | |
2526 s = reg_getline_submatch(slnum + i); | |
2527 if (list_append_string(list, s, -1) == FAIL) | |
2528 error = TRUE; | |
2529 } | |
2530 s = reg_getline_submatch(elnum); | |
2531 if (list_append_string(list, s, ecol) == FAIL) | |
2532 error = TRUE; | |
2533 } | |
2534 } | |
2535 else | |
2536 { | |
10245
d76ccdacb41e
commit https://github.com/vim/vim/commit/6100d02aab7c8294b581cb299250eea164b50e9d
Christian Brabandt <cb@256bit.org>
parents:
10187
diff
changeset
|
2537 s = rsm.sm_match->startp[no]; |
d76ccdacb41e
commit https://github.com/vim/vim/commit/6100d02aab7c8294b581cb299250eea164b50e9d
Christian Brabandt <cb@256bit.org>
parents:
10187
diff
changeset
|
2538 if (s == NULL || rsm.sm_match->endp[no] == NULL) |
5794 | 2539 return NULL; |
2540 list = list_alloc(); | |
2541 if (list == NULL) | |
2542 return NULL; | |
2543 if (list_append_string(list, s, | |
10245
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Christian Brabandt <cb@256bit.org>
parents:
10187
diff
changeset
|
2544 (int)(rsm.sm_match->endp[no] - s)) == FAIL) |
5794 | 2545 error = TRUE; |
2546 } | |
2547 | |
2548 if (error) | |
2549 { | |
8863
e1b84109506a
commit https://github.com/vim/vim/commit/107e1eef1df3b786ad3ad49fbdb9e058649303b5
Christian Brabandt <cb@256bit.org>
parents:
8825
diff
changeset
|
2550 list_free(list); |
5794 | 2551 return NULL; |
2552 } | |
22143
3ec9e302ec94
patch 8.2.1621: crash when using submatch(0, 1) in substitute()
Bram Moolenaar <Bram@vim.org>
parents:
20996
diff
changeset
|
2553 ++list->lv_refcount; |
5794 | 2554 return list; |
2555 } | |
7 | 2556 #endif |
4444 | 2557 |
19405
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
2558 /* |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
2559 * Initialize the values used for matching against multiple lines |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
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diff
changeset
|
2560 */ |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
2561 static void |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
2562 init_regexec_multi( |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
19384
diff
changeset
|
2563 regmmatch_T *rmp, |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
19384
diff
changeset
|
2564 win_T *win, // window in which to search or NULL |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
19384
diff
changeset
|
2565 buf_T *buf, // buffer in which to search |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
19384
diff
changeset
|
2566 linenr_T lnum) // nr of line to start looking for match |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
2567 { |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
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parents:
19384
diff
changeset
|
2568 rex.reg_match = NULL; |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
19384
diff
changeset
|
2569 rex.reg_mmatch = rmp; |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
19384
diff
changeset
|
2570 rex.reg_buf = buf; |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
2571 rex.reg_win = win; |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
19384
diff
changeset
|
2572 rex.reg_firstlnum = lnum; |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
2573 rex.reg_maxline = rex.reg_buf->b_ml.ml_line_count - lnum; |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
2574 rex.reg_line_lbr = FALSE; |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
2575 rex.reg_ic = rmp->rmm_ic; |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
2576 rex.reg_icombine = FALSE; |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
2577 rex.reg_maxcol = rmp->rmm_maxcol; |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
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parents:
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diff
changeset
|
2578 } |
08f4dc2ba716
patch 8.2.0260: several lines of code are duplicated
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parents:
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diff
changeset
|
2579 |
18019
68fd5296bf73
patch 8.1.2005: the regexp.c file is too big
Bram Moolenaar <Bram@vim.org>
parents:
17966
diff
changeset
|
2580 #include "regexp_bt.c" |
68fd5296bf73
patch 8.1.2005: the regexp.c file is too big
Bram Moolenaar <Bram@vim.org>
parents:
17966
diff
changeset
|
2581 |
4444 | 2582 static regengine_T bt_regengine = |
2583 { | |
2584 bt_regcomp, | |
4805
66803af09906
updated for version 7.3.1149
Bram Moolenaar <bram@vim.org>
parents:
4770
diff
changeset
|
2585 bt_regfree, |
4444 | 2586 bt_regexec_nl, |
6328 | 2587 bt_regexec_multi, |
2588 (char_u *)"" | |
4444 | 2589 }; |
2590 | |
2591 #include "regexp_nfa.c" | |
2592 | |
2593 static regengine_T nfa_regengine = | |
2594 { | |
2595 nfa_regcomp, | |
4805
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Bram Moolenaar <bram@vim.org>
parents:
4770
diff
changeset
|
2596 nfa_regfree, |
4444 | 2597 nfa_regexec_nl, |
6328 | 2598 nfa_regexec_multi, |
2599 (char_u *)"" | |
4444 | 2600 }; |
2601 | |
18812
d34ec6fe207d
patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18576
diff
changeset
|
2602 // Which regexp engine to use? Needed for vim_regcomp(). |
d34ec6fe207d
patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18576
diff
changeset
|
2603 // Must match with 'regexpengine'. |
4444 | 2604 static int regexp_engine = 0; |
6328 | 2605 |
4444 | 2606 #ifdef DEBUG |
2607 static char_u regname[][30] = { | |
2608 "AUTOMATIC Regexp Engine", | |
4579
7a2be4a39423
updated for version 7.3.1037
Bram Moolenaar <bram@vim.org>
parents:
4505
diff
changeset
|
2609 "BACKTRACKING Regexp Engine", |
4444 | 2610 "NFA Regexp Engine" |
2611 }; | |
2612 #endif | |
2613 | |
2614 /* | |
2615 * Compile a regular expression into internal code. | |
4805
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updated for version 7.3.1149
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parents:
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diff
changeset
|
2616 * Returns the program in allocated memory. |
66803af09906
updated for version 7.3.1149
Bram Moolenaar <bram@vim.org>
parents:
4770
diff
changeset
|
2617 * Use vim_regfree() to free the memory. |
66803af09906
updated for version 7.3.1149
Bram Moolenaar <bram@vim.org>
parents:
4770
diff
changeset
|
2618 * Returns NULL for an error. |
4444 | 2619 */ |
2620 regprog_T * | |
7833
c079097365f3
commit https://github.com/vim/vim/commit/055409764ca5f7978d4c399d2c440af0ce971c4f
Christian Brabandt <cb@256bit.org>
parents:
7807
diff
changeset
|
2621 vim_regcomp(char_u *expr_arg, int re_flags) |
4444 | 2622 { |
2623 regprog_T *prog = NULL; | |
2624 char_u *expr = expr_arg; | |
18949
5c405689da3e
patch 8.2.0035: saving and restoring called_emsg is clumsy
Bram Moolenaar <Bram@vim.org>
parents:
18812
diff
changeset
|
2625 int called_emsg_before; |
4444 | 2626 |
2627 regexp_engine = p_re; | |
2628 | |
18812
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patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18576
diff
changeset
|
2629 // Check for prefix "\%#=", that sets the regexp engine |
4444 | 2630 if (STRNCMP(expr, "\\%#=", 4) == 0) |
2631 { | |
2632 int newengine = expr[4] - '0'; | |
2633 | |
2634 if (newengine == AUTOMATIC_ENGINE | |
2635 || newengine == BACKTRACKING_ENGINE | |
2636 || newengine == NFA_ENGINE) | |
2637 { | |
2638 regexp_engine = expr[4] - '0'; | |
2639 expr += 5; | |
2640 #ifdef DEBUG | |
15470
55ccc2d353bd
patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
15339
diff
changeset
|
2641 smsg("New regexp mode selected (%d): %s", |
5897 | 2642 regexp_engine, regname[newengine]); |
4444 | 2643 #endif |
2644 } | |
2645 else | |
2646 { | |
15470
55ccc2d353bd
patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
15339
diff
changeset
|
2647 emsg(_("E864: \\%#= can only be followed by 0, 1, or 2. The automatic engine will be used ")); |
4444 | 2648 regexp_engine = AUTOMATIC_ENGINE; |
2649 } | |
2650 } | |
14354
ffd834f893aa
patch 8.1.0192: executing regexp recursively fails with a crash
Christian Brabandt <cb@256bit.org>
parents:
14169
diff
changeset
|
2651 #ifdef DEBUG |
4444 | 2652 bt_regengine.expr = expr; |
2653 nfa_regengine.expr = expr; | |
14354
ffd834f893aa
patch 8.1.0192: executing regexp recursively fails with a crash
Christian Brabandt <cb@256bit.org>
parents:
14169
diff
changeset
|
2654 #endif |
15856
e44b7caaf373
patch 8.1.0935: old regexp engine may use invalid buffer
Bram Moolenaar <Bram@vim.org>
parents:
15854
diff
changeset
|
2655 // reg_iswordc() uses rex.reg_buf |
e44b7caaf373
patch 8.1.0935: old regexp engine may use invalid buffer
Bram Moolenaar <Bram@vim.org>
parents:
15854
diff
changeset
|
2656 rex.reg_buf = curbuf; |
4444 | 2657 |
2658 /* | |
2659 * First try the NFA engine, unless backtracking was requested. | |
2660 */ | |
18949
5c405689da3e
patch 8.2.0035: saving and restoring called_emsg is clumsy
Bram Moolenaar <Bram@vim.org>
parents:
18812
diff
changeset
|
2661 called_emsg_before = called_emsg; |
4444 | 2662 if (regexp_engine != BACKTRACKING_ENGINE) |
13244
ac42c4b11dbc
patch 8.0.1496: clearing a pointer takes two lines
Christian Brabandt <cb@256bit.org>
parents:
12752
diff
changeset
|
2663 prog = nfa_regengine.regcomp(expr, |
6533 | 2664 re_flags + (regexp_engine == AUTOMATIC_ENGINE ? RE_AUTO : 0)); |
4444 | 2665 else |
2666 prog = bt_regengine.regcomp(expr, re_flags); | |
2667 | |
18812
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Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
2668 // Check for error compiling regexp with initial engine. |
6328 | 2669 if (prog == NULL) |
4444 | 2670 { |
4460 | 2671 #ifdef BT_REGEXP_DEBUG_LOG |
23471
a7cdfc8e4b6e
patch 8.2.2278: falling back to old regexp engine can some patterns
Bram Moolenaar <Bram@vim.org>
parents:
22167
diff
changeset
|
2672 if (regexp_engine == BACKTRACKING_ENGINE) // debugging log for BT engine |
4444 | 2673 { |
2674 FILE *f; | |
4460 | 2675 f = fopen(BT_REGEXP_DEBUG_LOG_NAME, "a"); |
4444 | 2676 if (f) |
2677 { | |
4762
47906f888725
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4760
diff
changeset
|
2678 fprintf(f, "Syntax error in \"%s\"\n", expr); |
4444 | 2679 fclose(f); |
2680 } | |
2681 else | |
15470
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patch 8.1.0743: giving error messages is not flexible
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
|
2682 semsg("(NFA) Could not open \"%s\" to write !!!", |
13244
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Christian Brabandt <cb@256bit.org>
parents:
12752
diff
changeset
|
2683 BT_REGEXP_DEBUG_LOG_NAME); |
4444 | 2684 } |
2685 #endif | |
2686 /* | |
6328 | 2687 * If the NFA engine failed, try the backtracking engine. |
6533 | 2688 * The NFA engine also fails for patterns that it can't handle well |
2689 * but are still valid patterns, thus a retry should work. | |
15935
ff00d207cc5e
patch 8.1.0973: pattern with syntax error gives threee error messages
Bram Moolenaar <Bram@vim.org>
parents:
15860
diff
changeset
|
2690 * But don't try if an error message was given. |
6533 | 2691 */ |
18949
5c405689da3e
patch 8.2.0035: saving and restoring called_emsg is clumsy
Bram Moolenaar <Bram@vim.org>
parents:
18812
diff
changeset
|
2692 if (regexp_engine == AUTOMATIC_ENGINE |
5c405689da3e
patch 8.2.0035: saving and restoring called_emsg is clumsy
Bram Moolenaar <Bram@vim.org>
parents:
18812
diff
changeset
|
2693 && called_emsg == called_emsg_before) |
6328 | 2694 { |
6533 | 2695 regexp_engine = BACKTRACKING_ENGINE; |
23471
a7cdfc8e4b6e
patch 8.2.2278: falling back to old regexp engine can some patterns
Bram Moolenaar <Bram@vim.org>
parents:
22167
diff
changeset
|
2696 #ifdef FEAT_EVAL |
a7cdfc8e4b6e
patch 8.2.2278: falling back to old regexp engine can some patterns
Bram Moolenaar <Bram@vim.org>
parents:
22167
diff
changeset
|
2697 report_re_switch(expr); |
a7cdfc8e4b6e
patch 8.2.2278: falling back to old regexp engine can some patterns
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parents:
22167
diff
changeset
|
2698 #endif |
4762
47906f888725
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4760
diff
changeset
|
2699 prog = bt_regengine.regcomp(expr, re_flags); |
6328 | 2700 } |
4762
47906f888725
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diff
changeset
|
2701 } |
4444 | 2702 |
6328 | 2703 if (prog != NULL) |
2704 { | |
18812
d34ec6fe207d
patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18576
diff
changeset
|
2705 // Store the info needed to call regcomp() again when the engine turns |
d34ec6fe207d
patch 8.1.2394: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18576
diff
changeset
|
2706 // out to be very slow when executing it. |
6328 | 2707 prog->re_engine = regexp_engine; |
2708 prog->re_flags = re_flags; | |
2709 } | |
2710 | |
4444 | 2711 return prog; |
2712 } | |
2713 | |
2714 /* | |
4805
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diff
changeset
|
2715 * Free a compiled regexp program, returned by vim_regcomp(). |
66803af09906
updated for version 7.3.1149
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parents:
4770
diff
changeset
|
2716 */ |
66803af09906
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diff
changeset
|
2717 void |
7833
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diff
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|
2718 vim_regfree(regprog_T *prog) |
4805
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|
2719 { |
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|
2720 if (prog != NULL) |
66803af09906
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|
2721 prog->engine->regfree(prog); |
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|
2722 } |
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|
2723 |
18019
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changeset
|
2724 #if defined(EXITFREE) || defined(PROTO) |
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|
2725 void |
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diff
changeset
|
2726 free_regexp_stuff(void) |
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patch 8.1.2005: the regexp.c file is too big
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diff
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|
2727 { |
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diff
changeset
|
2728 ga_clear(®stack); |
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patch 8.1.2005: the regexp.c file is too big
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parents:
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diff
changeset
|
2729 ga_clear(&backpos); |
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patch 8.1.2005: the regexp.c file is too big
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diff
changeset
|
2730 vim_free(reg_tofree); |
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patch 8.1.2005: the regexp.c file is too big
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diff
changeset
|
2731 vim_free(reg_prev_sub); |
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|
2732 } |
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changeset
|
2733 #endif |
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changeset
|
2734 |
6328 | 2735 #ifdef FEAT_EVAL |
2736 static void | |
7833
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diff
changeset
|
2737 report_re_switch(char_u *pat) |
6328 | 2738 { |
2739 if (p_verbose > 0) | |
2740 { | |
2741 verbose_enter(); | |
15543
dd725a8ab112
patch 8.1.0779: argument for message functions is inconsistent
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changeset
|
2742 msg_puts(_("Switching to backtracking RE engine for pattern: ")); |
dd725a8ab112
patch 8.1.0779: argument for message functions is inconsistent
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diff
changeset
|
2743 msg_puts((char *)pat); |
6328 | 2744 verbose_leave(); |
2745 } | |
2746 } | |
2747 #endif | |
2748 | |
15555
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patch 8.1.0785: depending on the configuration some functions are unused
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changeset
|
2749 #if (defined(FEAT_X11) && (defined(FEAT_TITLE) || defined(FEAT_XCLIPBOARD))) \ |
d89c5b339c2a
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|
2750 || defined(PROTO) |
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|
2751 /* |
15306
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patch 8.1.0661: clipboard regexp might be used recursively
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changeset
|
2752 * Return whether "prog" is currently being executed. |
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|
2753 */ |
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|
2754 int |
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changeset
|
2755 regprog_in_use(regprog_T *prog) |
7fff2d18e191
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|
2756 { |
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changeset
|
2757 return prog->re_in_use; |
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diff
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|
2758 } |
15555
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patch 8.1.0785: depending on the configuration some functions are unused
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changeset
|
2759 #endif |
15306
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changeset
|
2760 |
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diff
changeset
|
2761 /* |
4444 | 2762 * Match a regexp against a string. |
2763 * "rmp->regprog" is a compiled regexp as returned by vim_regcomp(). | |
6375 | 2764 * Note: "rmp->regprog" may be freed and changed. |
4444 | 2765 * Uses curbuf for line count and 'iskeyword'. |
6328 | 2766 * When "nl" is TRUE consider a "\n" in "line" to be a line break. |
4444 | 2767 * |
2768 * Return TRUE if there is a match, FALSE if not. | |
2769 */ | |
6328 | 2770 static int |
11529
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diff
changeset
|
2771 vim_regexec_string( |
7833
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diff
changeset
|
2772 regmatch_T *rmp, |
18812
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patch 8.1.2394: using old C style comments
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diff
changeset
|
2773 char_u *line, // string to match against |
d34ec6fe207d
patch 8.1.2394: using old C style comments
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parents:
18576
diff
changeset
|
2774 colnr_T col, // column to start looking for match |
7833
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diff
changeset
|
2775 int nl) |
6328 | 2776 { |
10245
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10187
diff
changeset
|
2777 int result; |
d76ccdacb41e
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10187
diff
changeset
|
2778 regexec_T rex_save; |
d76ccdacb41e
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Christian Brabandt <cb@256bit.org>
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diff
changeset
|
2779 int rex_in_use_save = rex_in_use; |
d76ccdacb41e
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diff
changeset
|
2780 |
14354
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|
2781 // Cannot use the same prog recursively, it contains state. |
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changeset
|
2782 if (rmp->regprog->re_in_use) |
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|
2783 { |
15470
55ccc2d353bd
patch 8.1.0743: giving error messages is not flexible
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changeset
|
2784 emsg(_(e_recursive)); |
14354
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|
2785 return FALSE; |
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|
2786 } |
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changeset
|
2787 rmp->regprog->re_in_use = TRUE; |
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|
2788 |
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changeset
|
2789 if (rex_in_use) |
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diff
changeset
|
2790 // Being called recursively, save the state. |
10245
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diff
changeset
|
2791 rex_save = rex; |
d76ccdacb41e
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|
2792 rex_in_use = TRUE; |
14354
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|
2793 |
10245
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diff
changeset
|
2794 rex.reg_startp = NULL; |
d76ccdacb41e
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diff
changeset
|
2795 rex.reg_endp = NULL; |
d76ccdacb41e
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diff
changeset
|
2796 rex.reg_startpos = NULL; |
d76ccdacb41e
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diff
changeset
|
2797 rex.reg_endpos = NULL; |
d76ccdacb41e
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diff
changeset
|
2798 |
d76ccdacb41e
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10187
diff
changeset
|
2799 result = rmp->regprog->engine->regexec_nl(rmp, line, col, nl); |
14358
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patch 8.1.0194: possibly use of NULL pointer
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diff
changeset
|
2800 rmp->regprog->re_in_use = FALSE; |
6328 | 2801 |
18812
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changeset
|
2802 // NFA engine aborted because it's very slow. |
6328 | 2803 if (rmp->regprog->re_engine == AUTOMATIC_ENGINE |
2804 && result == NFA_TOO_EXPENSIVE) | |
2805 { | |
2806 int save_p_re = p_re; | |
2807 int re_flags = rmp->regprog->re_flags; | |
2808 char_u *pat = vim_strsave(((nfa_regprog_T *)rmp->regprog)->pattern); | |
2809 | |
2810 p_re = BACKTRACKING_ENGINE; | |
2811 vim_regfree(rmp->regprog); | |
2812 if (pat != NULL) | |
2813 { | |
2814 #ifdef FEAT_EVAL | |
2815 report_re_switch(pat); | |
2816 #endif | |
2817 rmp->regprog = vim_regcomp(pat, re_flags); | |
2818 if (rmp->regprog != NULL) | |
14358
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|
2819 { |
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diff
changeset
|
2820 rmp->regprog->re_in_use = TRUE; |
6328 | 2821 result = rmp->regprog->engine->regexec_nl(rmp, line, col, nl); |
14358
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|
2822 rmp->regprog->re_in_use = FALSE; |
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diff
changeset
|
2823 } |
6328 | 2824 vim_free(pat); |
2825 } | |
2826 | |
2827 p_re = save_p_re; | |
2828 } | |
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diff
changeset
|
2829 |
d76ccdacb41e
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diff
changeset
|
2830 rex_in_use = rex_in_use_save; |
d76ccdacb41e
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changeset
|
2831 if (rex_in_use) |
d76ccdacb41e
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changeset
|
2832 rex = rex_save; |
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changeset
|
2833 |
6390 | 2834 return result > 0; |
6328 | 2835 } |
2836 | |
6375 | 2837 /* |
2838 * Note: "*prog" may be freed and changed. | |
6390 | 2839 * Return TRUE if there is a match, FALSE if not. |
6375 | 2840 */ |
2841 int | |
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changeset
|
2842 vim_regexec_prog( |
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changeset
|
2843 regprog_T **prog, |
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changeset
|
2844 int ignore_case, |
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|
2845 char_u *line, |
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changeset
|
2846 colnr_T col) |
6375 | 2847 { |
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|
2848 int r; |
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changeset
|
2849 regmatch_T regmatch; |
6375 | 2850 |
2851 regmatch.regprog = *prog; | |
2852 regmatch.rm_ic = ignore_case; | |
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|
2853 r = vim_regexec_string(®match, line, col, FALSE); |
6375 | 2854 *prog = regmatch.regprog; |
2855 return r; | |
2856 } | |
2857 | |
2858 /* | |
2859 * Note: "rmp->regprog" may be freed and changed. | |
6390 | 2860 * Return TRUE if there is a match, FALSE if not. |
6375 | 2861 */ |
4444 | 2862 int |
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changeset
|
2863 vim_regexec(regmatch_T *rmp, char_u *line, colnr_T col) |
4444 | 2864 { |
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|
2865 return vim_regexec_string(rmp, line, col, FALSE); |
4444 | 2866 } |
2867 | |
2868 /* | |
2869 * Like vim_regexec(), but consider a "\n" in "line" to be a line break. | |
6375 | 2870 * Note: "rmp->regprog" may be freed and changed. |
6390 | 2871 * Return TRUE if there is a match, FALSE if not. |
4444 | 2872 */ |
2873 int | |
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changeset
|
2874 vim_regexec_nl(regmatch_T *rmp, char_u *line, colnr_T col) |
4444 | 2875 { |
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|
2876 return vim_regexec_string(rmp, line, col, TRUE); |
4444 | 2877 } |
2878 | |
2879 /* | |
2880 * Match a regexp against multiple lines. | |
14161
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changeset
|
2881 * "rmp->regprog" must be a compiled regexp as returned by vim_regcomp(). |
7cac4646c552
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diff
changeset
|
2882 * Note: "rmp->regprog" may be freed and changed, even set to NULL. |
4444 | 2883 * Uses curbuf for line count and 'iskeyword'. |
2884 * | |
2885 * Return zero if there is no match. Return number of lines contained in the | |
2886 * match otherwise. | |
2887 */ | |
2888 long | |
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2889 vim_regexec_multi( |
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2890 regmmatch_T *rmp, |
18812
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2891 win_T *win, // window in which to search or NULL |
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2892 buf_T *buf, // buffer in which to search |
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2893 linenr_T lnum, // nr of line to start looking for match |
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2894 colnr_T col, // column to start looking for match |
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2895 proftime_T *tm, // timeout limit or NULL |
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2896 int *timed_out) // flag is set when timeout limit reached |
4444 | 2897 { |
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2898 int result; |
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2899 regexec_T rex_save; |
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2900 int rex_in_use_save = rex_in_use; |
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2901 |
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2902 // Cannot use the same prog recursively, it contains state. |
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2903 if (rmp->regprog->re_in_use) |
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2904 { |
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2905 emsg(_(e_recursive)); |
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2906 return FALSE; |
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2907 } |
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2908 rmp->regprog->re_in_use = TRUE; |
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2909 |
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2910 if (rex_in_use) |
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2911 // Being called recursively, save the state. |
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2912 rex_save = rex; |
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2913 rex_in_use = TRUE; |
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2914 |
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2915 result = rmp->regprog->engine->regexec_multi( |
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2916 rmp, win, buf, lnum, col, tm, timed_out); |
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2917 rmp->regprog->re_in_use = FALSE; |
6328 | 2918 |
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2919 // NFA engine aborted because it's very slow. |
6328 | 2920 if (rmp->regprog->re_engine == AUTOMATIC_ENGINE |
2921 && result == NFA_TOO_EXPENSIVE) | |
2922 { | |
2923 int save_p_re = p_re; | |
2924 int re_flags = rmp->regprog->re_flags; | |
2925 char_u *pat = vim_strsave(((nfa_regprog_T *)rmp->regprog)->pattern); | |
2926 | |
2927 p_re = BACKTRACKING_ENGINE; | |
2928 vim_regfree(rmp->regprog); | |
2929 if (pat != NULL) | |
2930 { | |
2931 #ifdef FEAT_EVAL | |
2932 report_re_switch(pat); | |
2933 #endif | |
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2934 #ifdef FEAT_SYN_HL |
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2935 // checking for \z misuse was already done when compiling for NFA, |
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2936 // allow all here |
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2937 reg_do_extmatch = REX_ALL; |
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2938 #endif |
6328 | 2939 rmp->regprog = vim_regcomp(pat, re_flags); |
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2940 #ifdef FEAT_SYN_HL |
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2941 reg_do_extmatch = 0; |
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2942 #endif |
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2943 |
6328 | 2944 if (rmp->regprog != NULL) |
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2945 { |
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2946 rmp->regprog->re_in_use = TRUE; |
6328 | 2947 result = rmp->regprog->engine->regexec_multi( |
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2948 rmp, win, buf, lnum, col, tm, timed_out); |
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2949 rmp->regprog->re_in_use = FALSE; |
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2950 } |
6328 | 2951 vim_free(pat); |
2952 } | |
2953 p_re = save_p_re; | |
2954 } | |
2955 | |
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2956 rex_in_use = rex_in_use_save; |
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2957 if (rex_in_use) |
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2958 rex = rex_save; |
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2959 |
6390 | 2960 return result <= 0 ? 0 : result; |
4444 | 2961 } |