Mercurial > vim
view src/charset.c @ 24102:f897c1862d9e
Added tag v8.2.2592 for changeset 6d3dee0d7de51f9cd677ae5781c2cabac1763773
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Sat, 13 Mar 2021 13:15:04 +0100 |
| parents | 44be09b25619 |
| children | 9257f3980f4a |
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/* vi:set ts=8 sts=4 sw=4 noet: * * VIM - Vi IMproved by Bram Moolenaar * * Do ":help uganda" in Vim to read copying and usage conditions. * Do ":help credits" in Vim to see a list of people who contributed. * See README.txt for an overview of the Vim source code. */ #include "vim.h" #if defined(HAVE_WCHAR_H) # include <wchar.h> // for towupper() and towlower() #endif static int win_nolbr_chartabsize(win_T *wp, char_u *s, colnr_T col, int *headp); static unsigned nr2hex(unsigned c); static int chartab_initialized = FALSE; // b_chartab[] is an array of 32 bytes, each bit representing one of the // characters 0-255. #define SET_CHARTAB(buf, c) (buf)->b_chartab[(unsigned)(c) >> 3] |= (1 << ((c) & 0x7)) #define RESET_CHARTAB(buf, c) (buf)->b_chartab[(unsigned)(c) >> 3] &= ~(1 << ((c) & 0x7)) #define GET_CHARTAB(buf, c) ((buf)->b_chartab[(unsigned)(c) >> 3] & (1 << ((c) & 0x7))) // table used below, see init_chartab() for an explanation static char_u g_chartab[256]; /* * Flags for g_chartab[]. */ #define CT_CELL_MASK 0x07 // mask: nr of display cells (1, 2 or 4) #define CT_PRINT_CHAR 0x10 // flag: set for printable chars #define CT_ID_CHAR 0x20 // flag: set for ID chars #define CT_FNAME_CHAR 0x40 // flag: set for file name chars static int in_win_border(win_T *wp, colnr_T vcol); /* * Fill g_chartab[]. Also fills curbuf->b_chartab[] with flags for keyword * characters for current buffer. * * Depends on the option settings 'iskeyword', 'isident', 'isfname', * 'isprint' and 'encoding'. * * The index in g_chartab[] depends on 'encoding': * - For non-multi-byte index with the byte (same as the character). * - For DBCS index with the first byte. * - For UTF-8 index with the character (when first byte is up to 0x80 it is * the same as the character, if the first byte is 0x80 and above it depends * on further bytes). * * The contents of g_chartab[]: * - The lower two bits, masked by CT_CELL_MASK, give the number of display * cells the character occupies (1 or 2). Not valid for UTF-8 above 0x80. * - CT_PRINT_CHAR bit is set when the character is printable (no need to * translate the character before displaying it). Note that only DBCS * characters can have 2 display cells and still be printable. * - CT_FNAME_CHAR bit is set when the character can be in a file name. * - CT_ID_CHAR bit is set when the character can be in an identifier. * * Return FAIL if 'iskeyword', 'isident', 'isfname' or 'isprint' option has an * error, OK otherwise. */ int init_chartab(void) { return buf_init_chartab(curbuf, TRUE); } int buf_init_chartab( buf_T *buf, int global) // FALSE: only set buf->b_chartab[] { int c; int c2; char_u *p; int i; int tilde; int do_isalpha; if (global) { /* * Set the default size for printable characters: * From <Space> to '~' is 1 (printable), others are 2 (not printable). * This also inits all 'isident' and 'isfname' flags to FALSE. * * EBCDIC: all chars below ' ' are not printable, all others are * printable. */ c = 0; while (c < ' ') g_chartab[c++] = (dy_flags & DY_UHEX) ? 4 : 2; #ifdef EBCDIC while (c < 255) #else while (c <= '~') #endif g_chartab[c++] = 1 + CT_PRINT_CHAR; while (c < 256) { // UTF-8: bytes 0xa0 - 0xff are printable (latin1) if (enc_utf8 && c >= 0xa0) g_chartab[c++] = CT_PRINT_CHAR + 1; // euc-jp characters starting with 0x8e are single width else if (enc_dbcs == DBCS_JPNU && c == 0x8e) g_chartab[c++] = CT_PRINT_CHAR + 1; // other double-byte chars can be printable AND double-width else if (enc_dbcs != 0 && MB_BYTE2LEN(c) == 2) g_chartab[c++] = CT_PRINT_CHAR + 2; else // the rest is unprintable by default g_chartab[c++] = (dy_flags & DY_UHEX) ? 4 : 2; } // Assume that every multi-byte char is a filename character. for (c = 1; c < 256; ++c) if ((enc_dbcs != 0 && MB_BYTE2LEN(c) > 1) || (enc_dbcs == DBCS_JPNU && c == 0x8e) || (enc_utf8 && c >= 0xa0)) g_chartab[c] |= CT_FNAME_CHAR; } /* * Init word char flags all to FALSE */ CLEAR_FIELD(buf->b_chartab); if (enc_dbcs != 0) for (c = 0; c < 256; ++c) { // double-byte characters are probably word characters if (MB_BYTE2LEN(c) == 2) SET_CHARTAB(buf, c); } #ifdef FEAT_LISP /* * In lisp mode the '-' character is included in keywords. */ if (buf->b_p_lisp) SET_CHARTAB(buf, '-'); #endif // Walk through the 'isident', 'iskeyword', 'isfname' and 'isprint' // options Each option is a list of characters, character numbers or // ranges, separated by commas, e.g.: "200-210,x,#-178,-" for (i = global ? 0 : 3; i <= 3; ++i) { if (i == 0) p = p_isi; // first round: 'isident' else if (i == 1) p = p_isp; // second round: 'isprint' else if (i == 2) p = p_isf; // third round: 'isfname' else // i == 3 p = buf->b_p_isk; // fourth round: 'iskeyword' while (*p) { tilde = FALSE; do_isalpha = FALSE; if (*p == '^' && p[1] != NUL) { tilde = TRUE; ++p; } if (VIM_ISDIGIT(*p)) c = getdigits(&p); else if (has_mbyte) c = mb_ptr2char_adv(&p); else c = *p++; c2 = -1; if (*p == '-' && p[1] != NUL) { ++p; if (VIM_ISDIGIT(*p)) c2 = getdigits(&p); else if (has_mbyte) c2 = mb_ptr2char_adv(&p); else c2 = *p++; } if (c <= 0 || c >= 256 || (c2 < c && c2 != -1) || c2 >= 256 || !(*p == NUL || *p == ',')) return FAIL; if (c2 == -1) // not a range { /* * A single '@' (not "@-@"): * Decide on letters being ID/printable/keyword chars with * standard function isalpha(). This takes care of locale for * single-byte characters). */ if (c == '@') { do_isalpha = TRUE; c = 1; c2 = 255; } else c2 = c; } while (c <= c2) { // Use the MB_ functions here, because isalpha() doesn't // work properly when 'encoding' is "latin1" and the locale is // "C". if (!do_isalpha || MB_ISLOWER(c) || MB_ISUPPER(c)) { if (i == 0) // (re)set ID flag { if (tilde) g_chartab[c] &= ~CT_ID_CHAR; else g_chartab[c] |= CT_ID_CHAR; } else if (i == 1) // (re)set printable { if ((c < ' ' #ifndef EBCDIC || c > '~' #endif // For double-byte we keep the cell width, so // that we can detect it from the first byte. ) && !(enc_dbcs && MB_BYTE2LEN(c) == 2)) { if (tilde) { g_chartab[c] = (g_chartab[c] & ~CT_CELL_MASK) + ((dy_flags & DY_UHEX) ? 4 : 2); g_chartab[c] &= ~CT_PRINT_CHAR; } else { g_chartab[c] = (g_chartab[c] & ~CT_CELL_MASK) + 1; g_chartab[c] |= CT_PRINT_CHAR; } } } else if (i == 2) // (re)set fname flag { if (tilde) g_chartab[c] &= ~CT_FNAME_CHAR; else g_chartab[c] |= CT_FNAME_CHAR; } else // i == 3 (re)set keyword flag { if (tilde) RESET_CHARTAB(buf, c); else SET_CHARTAB(buf, c); } } ++c; } c = *p; p = skip_to_option_part(p); if (c == ',' && *p == NUL) // Trailing comma is not allowed. return FAIL; } } chartab_initialized = TRUE; return OK; } /* * Translate any special characters in buf[bufsize] in-place. * The result is a string with only printable characters, but if there is not * enough room, not all characters will be translated. */ void trans_characters( char_u *buf, int bufsize) { int len; // length of string needing translation int room; // room in buffer after string char_u *trs; // translated character int trs_len; // length of trs[] len = (int)STRLEN(buf); room = bufsize - len; while (*buf != 0) { // Assume a multi-byte character doesn't need translation. if (has_mbyte && (trs_len = (*mb_ptr2len)(buf)) > 1) len -= trs_len; else { trs = transchar_byte(*buf); trs_len = (int)STRLEN(trs); if (trs_len > 1) { room -= trs_len - 1; if (room <= 0) return; mch_memmove(buf + trs_len, buf + 1, (size_t)len); } mch_memmove(buf, trs, (size_t)trs_len); --len; } buf += trs_len; } } /* * Translate a string into allocated memory, replacing special chars with * printable chars. Returns NULL when out of memory. */ char_u * transstr(char_u *s) { char_u *res; char_u *p; int l, len, c; char_u hexbuf[11]; if (has_mbyte) { // Compute the length of the result, taking account of unprintable // multi-byte characters. len = 0; p = s; while (*p != NUL) { if ((l = (*mb_ptr2len)(p)) > 1) { c = (*mb_ptr2char)(p); p += l; if (vim_isprintc(c)) len += l; else { transchar_hex(hexbuf, c); len += (int)STRLEN(hexbuf); } } else { l = byte2cells(*p++); if (l > 0) len += l; else len += 4; // illegal byte sequence } } res = alloc(len + 1); } else res = alloc(vim_strsize(s) + 1); if (res != NULL) { *res = NUL; p = s; while (*p != NUL) { if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1) { c = (*mb_ptr2char)(p); if (vim_isprintc(c)) STRNCAT(res, p, l); // append printable multi-byte char else transchar_hex(res + STRLEN(res), c); p += l; } else STRCAT(res, transchar_byte(*p++)); } } return res; } /* * Convert the string "str[orglen]" to do ignore-case comparing. Uses the * current locale. * When "buf" is NULL returns an allocated string (NULL for out-of-memory). * Otherwise puts the result in "buf[buflen]". */ char_u * str_foldcase( char_u *str, int orglen, char_u *buf, int buflen) { garray_T ga; int i; int len = orglen; #define GA_CHAR(i) ((char_u *)ga.ga_data)[i] #define GA_PTR(i) ((char_u *)ga.ga_data + i) #define STR_CHAR(i) (buf == NULL ? GA_CHAR(i) : buf[i]) #define STR_PTR(i) (buf == NULL ? GA_PTR(i) : buf + i) // Copy "str" into "buf" or allocated memory, unmodified. if (buf == NULL) { ga_init2(&ga, 1, 10); if (ga_grow(&ga, len + 1) == FAIL) return NULL; mch_memmove(ga.ga_data, str, (size_t)len); ga.ga_len = len; } else { if (len >= buflen) // Ugly! len = buflen - 1; mch_memmove(buf, str, (size_t)len); } if (buf == NULL) GA_CHAR(len) = NUL; else buf[len] = NUL; // Make each character lower case. i = 0; while (STR_CHAR(i) != NUL) { if (enc_utf8 || (has_mbyte && MB_BYTE2LEN(STR_CHAR(i)) > 1)) { if (enc_utf8) { int c = utf_ptr2char(STR_PTR(i)); int olen = utf_ptr2len(STR_PTR(i)); int lc = utf_tolower(c); // Only replace the character when it is not an invalid // sequence (ASCII character or more than one byte) and // utf_tolower() doesn't return the original character. if ((c < 0x80 || olen > 1) && c != lc) { int nlen = utf_char2len(lc); // If the byte length changes need to shift the following // characters forward or backward. if (olen != nlen) { if (nlen > olen) { if (buf == NULL ? ga_grow(&ga, nlen - olen + 1) == FAIL : len + nlen - olen >= buflen) { // out of memory, keep old char lc = c; nlen = olen; } } if (olen != nlen) { if (buf == NULL) { STRMOVE(GA_PTR(i) + nlen, GA_PTR(i) + olen); ga.ga_len += nlen - olen; } else { STRMOVE(buf + i + nlen, buf + i + olen); len += nlen - olen; } } } (void)utf_char2bytes(lc, STR_PTR(i)); } } // skip to next multi-byte char i += (*mb_ptr2len)(STR_PTR(i)); } else { if (buf == NULL) GA_CHAR(i) = TOLOWER_LOC(GA_CHAR(i)); else buf[i] = TOLOWER_LOC(buf[i]); ++i; } } if (buf == NULL) return (char_u *)ga.ga_data; return buf; } /* * Catch 22: g_chartab[] can't be initialized before the options are * initialized, and initializing options may cause transchar() to be called! * When chartab_initialized == FALSE don't use g_chartab[]. * Does NOT work for multi-byte characters, c must be <= 255. * Also doesn't work for the first byte of a multi-byte, "c" must be a * character! */ static char_u transchar_charbuf[7]; char_u * transchar(int c) { return transchar_buf(curbuf, c); } char_u * transchar_buf(buf_T *buf, int c) { int i; i = 0; if (IS_SPECIAL(c)) // special key code, display as ~@ char { transchar_charbuf[0] = '~'; transchar_charbuf[1] = '@'; i = 2; c = K_SECOND(c); } if ((!chartab_initialized && ( #ifdef EBCDIC (c >= 64 && c < 255) #else (c >= ' ' && c <= '~') #endif )) || (c < 256 && vim_isprintc_strict(c))) { // printable character transchar_charbuf[i] = c; transchar_charbuf[i + 1] = NUL; } else transchar_nonprint(buf, transchar_charbuf + i, c); return transchar_charbuf; } /* * Like transchar(), but called with a byte instead of a character. Checks * for an illegal UTF-8 byte. */ char_u * transchar_byte(int c) { if (enc_utf8 && c >= 0x80) { transchar_nonprint(curbuf, transchar_charbuf, c); return transchar_charbuf; } return transchar(c); } /* * Convert non-printable character to two or more printable characters in * "buf[]". "charbuf" needs to be able to hold five bytes. * Does NOT work for multi-byte characters, c must be <= 255. */ void transchar_nonprint(buf_T *buf, char_u *charbuf, int c) { if (c == NL) c = NUL; // we use newline in place of a NUL else if (c == CAR && get_fileformat(buf) == EOL_MAC) c = NL; // we use CR in place of NL in this case if (dy_flags & DY_UHEX) // 'display' has "uhex" transchar_hex(charbuf, c); #ifdef EBCDIC // For EBCDIC only the characters 0-63 and 255 are not printable else if (CtrlChar(c) != 0 || c == DEL) #else else if (c <= 0x7f) // 0x00 - 0x1f and 0x7f #endif { charbuf[0] = '^'; #ifdef EBCDIC if (c == DEL) charbuf[1] = '?'; // DEL displayed as ^? else charbuf[1] = CtrlChar(c); #else charbuf[1] = c ^ 0x40; // DEL displayed as ^? #endif charbuf[2] = NUL; } else if (enc_utf8 && c >= 0x80) { transchar_hex(charbuf, c); } #ifndef EBCDIC else if (c >= ' ' + 0x80 && c <= '~' + 0x80) // 0xa0 - 0xfe { charbuf[0] = '|'; charbuf[1] = c - 0x80; charbuf[2] = NUL; } #else else if (c < 64) { charbuf[0] = '~'; charbuf[1] = MetaChar(c); charbuf[2] = NUL; } #endif else // 0x80 - 0x9f and 0xff { /* * TODO: EBCDIC I don't know what to do with this chars, so I display * them as '~?' for now */ charbuf[0] = '~'; #ifdef EBCDIC charbuf[1] = '?'; // 0xff displayed as ~? #else charbuf[1] = (c - 0x80) ^ 0x40; // 0xff displayed as ~? #endif charbuf[2] = NUL; } } void transchar_hex(char_u *buf, int c) { int i = 0; buf[0] = '<'; if (c > 255) { buf[++i] = nr2hex((unsigned)c >> 12); buf[++i] = nr2hex((unsigned)c >> 8); } buf[++i] = nr2hex((unsigned)c >> 4); buf[++i] = nr2hex((unsigned)c); buf[++i] = '>'; buf[++i] = NUL; } /* * Convert the lower 4 bits of byte "c" to its hex character. * Lower case letters are used to avoid the confusion of <F1> being 0xf1 or * function key 1. */ static unsigned nr2hex(unsigned c) { if ((c & 0xf) <= 9) return (c & 0xf) + '0'; return (c & 0xf) - 10 + 'a'; } /* * Return number of display cells occupied by byte "b". * Caller must make sure 0 <= b <= 255. * For multi-byte mode "b" must be the first byte of a character. * A TAB is counted as two cells: "^I". * For UTF-8 mode this will return 0 for bytes >= 0x80, because the number of * cells depends on further bytes. */ int byte2cells(int b) { if (enc_utf8 && b >= 0x80) return 0; return (g_chartab[b] & CT_CELL_MASK); } /* * Return number of display cells occupied by character "c". * "c" can be a special key (negative number) in which case 3 or 4 is returned. * A TAB is counted as two cells: "^I" or four: "<09>". */ int char2cells(int c) { if (IS_SPECIAL(c)) return char2cells(K_SECOND(c)) + 2; if (c >= 0x80) { // UTF-8: above 0x80 need to check the value if (enc_utf8) return utf_char2cells(c); // DBCS: double-byte means double-width, except for euc-jp with first // byte 0x8e if (enc_dbcs != 0 && c >= 0x100) { if (enc_dbcs == DBCS_JPNU && ((unsigned)c >> 8) == 0x8e) return 1; return 2; } } return (g_chartab[c & 0xff] & CT_CELL_MASK); } /* * Return number of display cells occupied by character at "*p". * A TAB is counted as two cells: "^I" or four: "<09>". */ int ptr2cells(char_u *p) { // For UTF-8 we need to look at more bytes if the first byte is >= 0x80. if (enc_utf8 && *p >= 0x80) return utf_ptr2cells(p); // For DBCS we can tell the cell count from the first byte. return (g_chartab[*p] & CT_CELL_MASK); } /* * Return the number of character cells string "s" will take on the screen, * counting TABs as two characters: "^I". */ int vim_strsize(char_u *s) { return vim_strnsize(s, (int)MAXCOL); } /* * Return the number of character cells string "s[len]" will take on the * screen, counting TABs as two characters: "^I". */ int vim_strnsize(char_u *s, int len) { int size = 0; while (*s != NUL && --len >= 0) if (has_mbyte) { int l = (*mb_ptr2len)(s); size += ptr2cells(s); s += l; len -= l - 1; } else size += byte2cells(*s++); return size; } /* * Return the number of characters 'c' will take on the screen, taking * into account the size of a tab. * Use a define to make it fast, this is used very often!!! * Also see getvcol() below. */ #ifdef FEAT_VARTABS # define RET_WIN_BUF_CHARTABSIZE(wp, buf, p, col) \ if (*(p) == TAB && (!(wp)->w_p_list || wp->w_lcs_chars.tab1)) \ { \ return tabstop_padding(col, (buf)->b_p_ts, (buf)->b_p_vts_array); \ } \ else \ return ptr2cells(p); #else # define RET_WIN_BUF_CHARTABSIZE(wp, buf, p, col) \ if (*(p) == TAB && (!(wp)->w_p_list || wp->w_lcs_chars.tab1)) \ { \ int ts; \ ts = (buf)->b_p_ts; \ return (int)(ts - (col % ts)); \ } \ else \ return ptr2cells(p); #endif int chartabsize(char_u *p, colnr_T col) { RET_WIN_BUF_CHARTABSIZE(curwin, curbuf, p, col) } #ifdef FEAT_LINEBREAK static int win_chartabsize(win_T *wp, char_u *p, colnr_T col) { RET_WIN_BUF_CHARTABSIZE(wp, wp->w_buffer, p, col) } #endif /* * Return the number of characters the string 's' will take on the screen, * taking into account the size of a tab. */ int linetabsize(char_u *s) { return linetabsize_col(0, s); } /* * Like linetabsize(), but starting at column "startcol". */ int linetabsize_col(int startcol, char_u *s) { colnr_T col = startcol; char_u *line = s; // pointer to start of line, for breakindent while (*s != NUL) col += lbr_chartabsize_adv(line, &s, col); return (int)col; } /* * Like linetabsize(), but for a given window instead of the current one. */ int win_linetabsize(win_T *wp, char_u *line, colnr_T len) { colnr_T col = 0; char_u *s; for (s = line; *s != NUL && (len == MAXCOL || s < line + len); MB_PTR_ADV(s)) col += win_lbr_chartabsize(wp, line, s, col, NULL); return (int)col; } /* * Return TRUE if 'c' is a normal identifier character: * Letters and characters from the 'isident' option. */ int vim_isIDc(int c) { return (c > 0 && c < 0x100 && (g_chartab[c] & CT_ID_CHAR)); } /* * return TRUE if 'c' is a keyword character: Letters and characters from * 'iskeyword' option for the current buffer. * For multi-byte characters mb_get_class() is used (builtin rules). */ int vim_iswordc(int c) { return vim_iswordc_buf(c, curbuf); } int vim_iswordc_buf(int c, buf_T *buf) { if (c >= 0x100) { if (enc_dbcs != 0) return dbcs_class((unsigned)c >> 8, (unsigned)(c & 0xff)) >= 2; if (enc_utf8) return utf_class_buf(c, buf) >= 2; return FALSE; } return (c > 0 && GET_CHARTAB(buf, c) != 0); } /* * Just like vim_iswordc() but uses a pointer to the (multi-byte) character. */ int vim_iswordp(char_u *p) { return vim_iswordp_buf(p, curbuf); } int vim_iswordp_buf(char_u *p, buf_T *buf) { int c = *p; if (has_mbyte && MB_BYTE2LEN(c) > 1) c = (*mb_ptr2char)(p); return vim_iswordc_buf(c, buf); } /* * return TRUE if 'c' is a valid file-name character * Assume characters above 0x100 are valid (multi-byte). */ int vim_isfilec(int c) { return (c >= 0x100 || (c > 0 && (g_chartab[c] & CT_FNAME_CHAR))); } /* * return TRUE if 'c' is a valid file-name character or a wildcard character * Assume characters above 0x100 are valid (multi-byte). * Explicitly interpret ']' as a wildcard character as mch_has_wildcard("]") * returns false. */ int vim_isfilec_or_wc(int c) { char_u buf[2]; buf[0] = (char_u)c; buf[1] = NUL; return vim_isfilec(c) || c == ']' || mch_has_wildcard(buf); } /* * Return TRUE if 'c' is a printable character. * Assume characters above 0x100 are printable (multi-byte), except for * Unicode. */ int vim_isprintc(int c) { if (enc_utf8 && c >= 0x100) return utf_printable(c); return (c >= 0x100 || (c > 0 && (g_chartab[c] & CT_PRINT_CHAR))); } /* * Strict version of vim_isprintc(c), don't return TRUE if "c" is the head * byte of a double-byte character. */ int vim_isprintc_strict(int c) { if (enc_dbcs != 0 && c < 0x100 && MB_BYTE2LEN(c) > 1) return FALSE; if (enc_utf8 && c >= 0x100) return utf_printable(c); return (c >= 0x100 || (c > 0 && (g_chartab[c] & CT_PRINT_CHAR))); } /* * like chartabsize(), but also check for line breaks on the screen */ int lbr_chartabsize( char_u *line UNUSED, // start of the line unsigned char *s, colnr_T col) { #ifdef FEAT_LINEBREAK if (!curwin->w_p_lbr && *get_showbreak_value(curwin) == NUL && !curwin->w_p_bri) { #endif if (curwin->w_p_wrap) return win_nolbr_chartabsize(curwin, s, col, NULL); RET_WIN_BUF_CHARTABSIZE(curwin, curbuf, s, col) #ifdef FEAT_LINEBREAK } return win_lbr_chartabsize(curwin, line == NULL ? s : line, s, col, NULL); #endif } /* * Call lbr_chartabsize() and advance the pointer. */ int lbr_chartabsize_adv( char_u *line, // start of the line char_u **s, colnr_T col) { int retval; retval = lbr_chartabsize(line, *s, col); MB_PTR_ADV(*s); return retval; } /* * This function is used very often, keep it fast!!!! * * If "headp" not NULL, set *headp to the size of what we for 'showbreak' * string at start of line. Warning: *headp is only set if it's a non-zero * value, init to 0 before calling. */ int win_lbr_chartabsize( win_T *wp, char_u *line UNUSED, // start of the line char_u *s, colnr_T col, int *headp UNUSED) { #ifdef FEAT_LINEBREAK int c; int size; colnr_T col2; colnr_T col_adj = 0; // col + screen size of tab colnr_T colmax; int added; int mb_added = 0; int numberextra; char_u *ps; int tab_corr = (*s == TAB); int n; char_u *sbr; /* * No 'linebreak', 'showbreak' and 'breakindent': return quickly. */ if (!wp->w_p_lbr && !wp->w_p_bri && *get_showbreak_value(wp) == NUL) #endif { if (wp->w_p_wrap) return win_nolbr_chartabsize(wp, s, col, headp); RET_WIN_BUF_CHARTABSIZE(wp, wp->w_buffer, s, col) } #ifdef FEAT_LINEBREAK /* * First get normal size, without 'linebreak' */ size = win_chartabsize(wp, s, col); c = *s; if (tab_corr) col_adj = size - 1; /* * If 'linebreak' set check at a blank before a non-blank if the line * needs a break here */ if (wp->w_p_lbr && VIM_ISBREAK(c) && !VIM_ISBREAK((int)s[1]) && wp->w_p_wrap && wp->w_width != 0) { /* * Count all characters from first non-blank after a blank up to next * non-blank after a blank. */ numberextra = win_col_off(wp); col2 = col; colmax = (colnr_T)(wp->w_width - numberextra - col_adj); if (col >= colmax) { colmax += col_adj; n = colmax + win_col_off2(wp); if (n > 0) colmax += (((col - colmax) / n) + 1) * n - col_adj; } for (;;) { ps = s; MB_PTR_ADV(s); c = *s; if (!(c != NUL && (VIM_ISBREAK(c) || (!VIM_ISBREAK(c) && (col2 == col || !VIM_ISBREAK((int)*ps)))))) break; col2 += win_chartabsize(wp, s, col2); if (col2 >= colmax) // doesn't fit { size = colmax - col + col_adj; break; } } } else if (has_mbyte && size == 2 && MB_BYTE2LEN(*s) > 1 && wp->w_p_wrap && in_win_border(wp, col)) { ++size; // Count the ">" in the last column. mb_added = 1; } /* * May have to add something for 'breakindent' and/or 'showbreak' * string at start of line. * Set *headp to the size of what we add. */ added = 0; sbr = get_showbreak_value(wp); if ((*sbr != NUL || wp->w_p_bri) && wp->w_p_wrap && col != 0) { colnr_T sbrlen = 0; int numberwidth = win_col_off(wp); numberextra = numberwidth; col += numberextra + mb_added; if (col >= (colnr_T)wp->w_width) { col -= wp->w_width; numberextra = wp->w_width - (numberextra - win_col_off2(wp)); if (col >= numberextra && numberextra > 0) col %= numberextra; if (*sbr != NUL) { sbrlen = (colnr_T)MB_CHARLEN(sbr); if (col >= sbrlen) col -= sbrlen; } if (col >= numberextra && numberextra > 0) col = col % numberextra; else if (col > 0 && numberextra > 0) col += numberwidth - win_col_off2(wp); numberwidth -= win_col_off2(wp); } if (col == 0 || col + size + sbrlen > (colnr_T)wp->w_width) { added = 0; if (*sbr != NUL) { if (size + sbrlen + numberwidth > (colnr_T)wp->w_width) { // calculate effective window width int width = (colnr_T)wp->w_width - sbrlen - numberwidth; int prev_width = col ? ((colnr_T)wp->w_width - (sbrlen + col)) : 0; if (width <= 0) width = (colnr_T)1; added += ((size - prev_width) / width) * vim_strsize(sbr); if ((size - prev_width) % width) // wrapped, add another length of 'sbr' added += vim_strsize(sbr); } else added += vim_strsize(sbr); } if (wp->w_p_bri) added += get_breakindent_win(wp, line); size += added; if (col != 0) added = 0; } } if (headp != NULL) *headp = added + mb_added; return size; #endif } /* * Like win_lbr_chartabsize(), except that we know 'linebreak' is off and * 'wrap' is on. This means we need to check for a double-byte character that * doesn't fit at the end of the screen line. */ static int win_nolbr_chartabsize( win_T *wp, char_u *s, colnr_T col, int *headp) { int n; if (*s == TAB && (!wp->w_p_list || wp->w_lcs_chars.tab1)) { # ifdef FEAT_VARTABS return tabstop_padding(col, wp->w_buffer->b_p_ts, wp->w_buffer->b_p_vts_array); # else n = wp->w_buffer->b_p_ts; return (int)(n - (col % n)); # endif } n = ptr2cells(s); // Add one cell for a double-width character in the last column of the // window, displayed with a ">". if (n == 2 && MB_BYTE2LEN(*s) > 1 && in_win_border(wp, col)) { if (headp != NULL) *headp = 1; return 3; } return n; } /* * Return TRUE if virtual column "vcol" is in the rightmost column of window * "wp". */ static int in_win_border(win_T *wp, colnr_T vcol) { int width1; // width of first line (after line number) int width2; // width of further lines if (wp->w_width == 0) // there is no border return FALSE; width1 = wp->w_width - win_col_off(wp); if ((int)vcol < width1 - 1) return FALSE; if ((int)vcol == width1 - 1) return TRUE; width2 = width1 + win_col_off2(wp); if (width2 <= 0) return FALSE; return ((vcol - width1) % width2 == width2 - 1); } /* * Get virtual column number of pos. * start: on the first position of this character (TAB, ctrl) * cursor: where the cursor is on this character (first char, except for TAB) * end: on the last position of this character (TAB, ctrl) * * This is used very often, keep it fast! */ void getvcol( win_T *wp, pos_T *pos, colnr_T *start, colnr_T *cursor, colnr_T *end) { colnr_T vcol; char_u *ptr; // points to current char char_u *posptr; // points to char at pos->col char_u *line; // start of the line int incr; int head; #ifdef FEAT_VARTABS int *vts = wp->w_buffer->b_p_vts_array; #endif int ts = wp->w_buffer->b_p_ts; int c; vcol = 0; line = ptr = ml_get_buf(wp->w_buffer, pos->lnum, FALSE); if (pos->col == MAXCOL) posptr = NULL; // continue until the NUL else { // Special check for an empty line, which can happen on exit, when // ml_get_buf() always returns an empty string. if (*ptr == NUL) pos->col = 0; posptr = ptr + pos->col; if (has_mbyte) // always start on the first byte posptr -= (*mb_head_off)(line, posptr); } /* * This function is used very often, do some speed optimizations. * When 'list', 'linebreak', 'showbreak' and 'breakindent' are not set * use a simple loop. * Also use this when 'list' is set but tabs take their normal size. */ if ((!wp->w_p_list || wp->w_lcs_chars.tab1 != NUL) #ifdef FEAT_LINEBREAK && !wp->w_p_lbr && *get_showbreak_value(wp) == NUL && !wp->w_p_bri #endif ) { for (;;) { head = 0; c = *ptr; // make sure we don't go past the end of the line if (c == NUL) { incr = 1; // NUL at end of line only takes one column break; } // A tab gets expanded, depending on the current column if (c == TAB) #ifdef FEAT_VARTABS incr = tabstop_padding(vcol, ts, vts); #else incr = ts - (vcol % ts); #endif else { if (has_mbyte) { // For utf-8, if the byte is >= 0x80, need to look at // further bytes to find the cell width. if (enc_utf8 && c >= 0x80) incr = utf_ptr2cells(ptr); else incr = g_chartab[c] & CT_CELL_MASK; // If a double-cell char doesn't fit at the end of a line // it wraps to the next line, it's like this char is three // cells wide. if (incr == 2 && wp->w_p_wrap && MB_BYTE2LEN(*ptr) > 1 && in_win_border(wp, vcol)) { ++incr; head = 1; } } else incr = g_chartab[c] & CT_CELL_MASK; } if (posptr != NULL && ptr >= posptr) // character at pos->col break; vcol += incr; MB_PTR_ADV(ptr); } } else { for (;;) { // A tab gets expanded, depending on the current column head = 0; incr = win_lbr_chartabsize(wp, line, ptr, vcol, &head); // make sure we don't go past the end of the line if (*ptr == NUL) { incr = 1; // NUL at end of line only takes one column break; } if (posptr != NULL && ptr >= posptr) // character at pos->col break; vcol += incr; MB_PTR_ADV(ptr); } } if (start != NULL) *start = vcol + head; if (end != NULL) *end = vcol + incr - 1; if (cursor != NULL) { if (*ptr == TAB && (State & NORMAL) && !wp->w_p_list && !virtual_active() && !(VIsual_active && (*p_sel == 'e' || LTOREQ_POS(*pos, VIsual))) ) *cursor = vcol + incr - 1; // cursor at end else *cursor = vcol + head; // cursor at start } } /* * Get virtual cursor column in the current window, pretending 'list' is off. */ colnr_T getvcol_nolist(pos_T *posp) { int list_save = curwin->w_p_list; colnr_T vcol; curwin->w_p_list = FALSE; if (posp->coladd) getvvcol(curwin, posp, NULL, &vcol, NULL); else getvcol(curwin, posp, NULL, &vcol, NULL); curwin->w_p_list = list_save; return vcol; } /* * Get virtual column in virtual mode. */ void getvvcol( win_T *wp, pos_T *pos, colnr_T *start, colnr_T *cursor, colnr_T *end) { colnr_T col; colnr_T coladd; colnr_T endadd; char_u *ptr; if (virtual_active()) { // For virtual mode, only want one value getvcol(wp, pos, &col, NULL, NULL); coladd = pos->coladd; endadd = 0; // Cannot put the cursor on part of a wide character. ptr = ml_get_buf(wp->w_buffer, pos->lnum, FALSE); if (pos->col < (colnr_T)STRLEN(ptr)) { int c = (*mb_ptr2char)(ptr + pos->col); if (c != TAB && vim_isprintc(c)) { endadd = (colnr_T)(char2cells(c) - 1); if (coladd > endadd) // past end of line endadd = 0; else coladd = 0; } } col += coladd; if (start != NULL) *start = col; if (cursor != NULL) *cursor = col; if (end != NULL) *end = col + endadd; } else getvcol(wp, pos, start, cursor, end); } /* * Get the leftmost and rightmost virtual column of pos1 and pos2. * Used for Visual block mode. */ void getvcols( win_T *wp, pos_T *pos1, pos_T *pos2, colnr_T *left, colnr_T *right) { colnr_T from1, from2, to1, to2; if (LT_POSP(pos1, pos2)) { getvvcol(wp, pos1, &from1, NULL, &to1); getvvcol(wp, pos2, &from2, NULL, &to2); } else { getvvcol(wp, pos2, &from1, NULL, &to1); getvvcol(wp, pos1, &from2, NULL, &to2); } if (from2 < from1) *left = from2; else *left = from1; if (to2 > to1) { if (*p_sel == 'e' && from2 - 1 >= to1) *right = from2 - 1; else *right = to2; } else *right = to1; } /* * skipwhite: skip over ' ' and '\t'. */ char_u * skipwhite(char_u *q) { char_u *p = q; while (VIM_ISWHITE(*p)) // skip to next non-white ++p; return p; } /* * getwhitecols: return the number of whitespace * columns (bytes) at the start of a given line */ int getwhitecols_curline() { return getwhitecols(ml_get_curline()); } int getwhitecols(char_u *p) { return skipwhite(p) - p; } /* * skip over digits */ char_u * skipdigits(char_u *q) { char_u *p = q; while (VIM_ISDIGIT(*p)) // skip to next non-digit ++p; return p; } #if defined(FEAT_SYN_HL) || defined(FEAT_SPELL) || defined(PROTO) /* * skip over binary digits */ char_u * skipbin(char_u *q) { char_u *p = q; while (vim_isbdigit(*p)) // skip to next non-digit ++p; return p; } /* * skip over digits and hex characters */ char_u * skiphex(char_u *q) { char_u *p = q; while (vim_isxdigit(*p)) // skip to next non-digit ++p; return p; } #endif /* * skip to bin digit (or NUL after the string) */ char_u * skiptobin(char_u *q) { char_u *p = q; while (*p != NUL && !vim_isbdigit(*p)) // skip to next digit ++p; return p; } /* * skip to digit (or NUL after the string) */ char_u * skiptodigit(char_u *q) { char_u *p = q; while (*p != NUL && !VIM_ISDIGIT(*p)) // skip to next digit ++p; return p; } /* * skip to hex character (or NUL after the string) */ char_u * skiptohex(char_u *q) { char_u *p = q; while (*p != NUL && !vim_isxdigit(*p)) // skip to next digit ++p; return p; } /* * Variant of isdigit() that can handle characters > 0x100. * We don't use isdigit() here, because on some systems it also considers * superscript 1 to be a digit. * Use the VIM_ISDIGIT() macro for simple arguments. */ int vim_isdigit(int c) { return (c >= '0' && c <= '9'); } /* * Variant of isxdigit() that can handle characters > 0x100. * We don't use isxdigit() here, because on some systems it also considers * superscript 1 to be a digit. */ int vim_isxdigit(int c) { return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'); } /* * Corollary of vim_isdigit and vim_isxdigit() that can handle * characters > 0x100. */ int vim_isbdigit(int c) { return (c == '0' || c == '1'); } static int vim_isodigit(int c) { return (c >= '0' && c <= '7'); } /* * Vim's own character class functions. These exist because many library * islower()/toupper() etc. do not work properly: they crash when used with * invalid values or can't handle latin1 when the locale is C. * Speed is most important here. */ #define LATIN1LOWER 'l' #define LATIN1UPPER 'U' static char_u latin1flags[257] = " UUUUUUUUUUUUUUUUUUUUUUUUUU llllllllllllllllllllllllll UUUUUUUUUUUUUUUUUUUUUUU UUUUUUUllllllllllllllllllllllll llllllll"; static char_u latin1upper[257] = " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`ABCDEFGHIJKLMNOPQRSTUVWXYZ{|}~\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xf7\xd8\xd9\xda\xdb\xdc\xdd\xde\xff"; static char_u latin1lower[257] = " !\"#$%&'()*+,-./0123456789:;<=>?@abcdefghijklmnopqrstuvwxyz[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xd7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"; int vim_islower(int c) { if (c <= '@') return FALSE; if (c >= 0x80) { if (enc_utf8) return utf_islower(c); if (c >= 0x100) { #ifdef HAVE_ISWLOWER if (has_mbyte) return iswlower(c); #endif // islower() can't handle these chars and may crash return FALSE; } if (enc_latin1like) return (latin1flags[c] & LATIN1LOWER) == LATIN1LOWER; } return islower(c); } int vim_isupper(int c) { if (c <= '@') return FALSE; if (c >= 0x80) { if (enc_utf8) return utf_isupper(c); if (c >= 0x100) { #ifdef HAVE_ISWUPPER if (has_mbyte) return iswupper(c); #endif // islower() can't handle these chars and may crash return FALSE; } if (enc_latin1like) return (latin1flags[c] & LATIN1UPPER) == LATIN1UPPER; } return isupper(c); } int vim_toupper(int c) { if (c <= '@') return c; if (c >= 0x80 || !(cmp_flags & CMP_KEEPASCII)) { if (enc_utf8) return utf_toupper(c); if (c >= 0x100) { #ifdef HAVE_TOWUPPER if (has_mbyte) return towupper(c); #endif // toupper() can't handle these chars and may crash return c; } if (enc_latin1like) return latin1upper[c]; } if (c < 0x80 && (cmp_flags & CMP_KEEPASCII)) return TOUPPER_ASC(c); return TOUPPER_LOC(c); } int vim_tolower(int c) { if (c <= '@') return c; if (c >= 0x80 || !(cmp_flags & CMP_KEEPASCII)) { if (enc_utf8) return utf_tolower(c); if (c >= 0x100) { #ifdef HAVE_TOWLOWER if (has_mbyte) return towlower(c); #endif // tolower() can't handle these chars and may crash return c; } if (enc_latin1like) return latin1lower[c]; } if (c < 0x80 && (cmp_flags & CMP_KEEPASCII)) return TOLOWER_ASC(c); return TOLOWER_LOC(c); } /* * skiptowhite: skip over text until ' ' or '\t' or NUL. */ char_u * skiptowhite(char_u *p) { while (*p != ' ' && *p != '\t' && *p != NUL) ++p; return p; } /* * skiptowhite_esc: Like skiptowhite(), but also skip escaped chars */ char_u * skiptowhite_esc(char_u *p) { while (*p != ' ' && *p != '\t' && *p != NUL) { if ((*p == '\\' || *p == Ctrl_V) && *(p + 1) != NUL) ++p; ++p; } return p; } /* * Getdigits: Get a number from a string and skip over it. * Note: the argument is a pointer to a char_u pointer! */ long getdigits(char_u **pp) { char_u *p; long retval; p = *pp; retval = atol((char *)p); if (*p == '-') // skip negative sign ++p; p = skipdigits(p); // skip to next non-digit *pp = p; return retval; } /* * Return TRUE if "lbuf" is empty or only contains blanks. */ int vim_isblankline(char_u *lbuf) { char_u *p; p = skipwhite(lbuf); return (*p == NUL || *p == '\r' || *p == '\n'); } /* * Convert a string into a long and/or unsigned long, taking care of * hexadecimal, octal, and binary numbers. Accepts a '-' sign. * If "prep" is not NULL, returns a flag to indicate the type of the number: * 0 decimal * '0' octal * 'O' octal * 'o' octal * 'B' bin * 'b' bin * 'X' hex * 'x' hex * If "len" is not NULL, the length of the number in characters is returned. * If "nptr" is not NULL, the signed result is returned in it. * If "unptr" is not NULL, the unsigned result is returned in it. * If "what" contains STR2NR_BIN recognize binary numbers * If "what" contains STR2NR_OCT recognize octal numbers * If "what" contains STR2NR_HEX recognize hex numbers * If "what" contains STR2NR_FORCE always assume bin/oct/hex. * If "what" contains STR2NR_QUOTE ignore embedded single quotes * If maxlen > 0, check at a maximum maxlen chars. * If strict is TRUE, check the number strictly. return *len = 0 if fail. */ void vim_str2nr( char_u *start, int *prep, // return: type of number 0 = decimal, 'x' // or 'X' is hex, '0', 'o' or 'O' is octal, // 'b' or 'B' is bin int *len, // return: detected length of number int what, // what numbers to recognize varnumber_T *nptr, // return: signed result uvarnumber_T *unptr, // return: unsigned result int maxlen, // max length of string to check int strict) // check strictly { char_u *ptr = start; int pre = 0; // default is decimal int negative = FALSE; uvarnumber_T un = 0; int n; if (len != NULL) *len = 0; if (ptr[0] == '-') { negative = TRUE; ++ptr; } // Recognize hex, octal, and bin. if (ptr[0] == '0' && ptr[1] != '8' && ptr[1] != '9' && (maxlen == 0 || maxlen > 1)) { pre = ptr[1]; if ((what & STR2NR_HEX) && (pre == 'X' || pre == 'x') && vim_isxdigit(ptr[2]) && (maxlen == 0 || maxlen > 2)) // hexadecimal ptr += 2; else if ((what & STR2NR_BIN) && (pre == 'B' || pre == 'b') && vim_isbdigit(ptr[2]) && (maxlen == 0 || maxlen > 2)) // binary ptr += 2; else if ((what & STR2NR_OOCT) && (pre == 'O' || pre == 'o') && vim_isodigit(ptr[2]) && (maxlen == 0 || maxlen > 2)) // octal with prefix "0o" ptr += 2; else { // decimal or octal, default is decimal pre = 0; if (what & STR2NR_OCT) { // Don't interpret "0", "08" or "0129" as octal. for (n = 1; n != maxlen && VIM_ISDIGIT(ptr[n]); ++n) { if (ptr[n] > '7') { pre = 0; // can't be octal break; } pre = '0'; // assume octal } } } } // Do the conversion manually to avoid sscanf() quirks. n = 1; if (pre == 'B' || pre == 'b' || ((what & STR2NR_BIN) && (what & STR2NR_FORCE))) { // bin if (pre != 0) n += 2; // skip over "0b" while ('0' <= *ptr && *ptr <= '1') { // avoid ubsan error for overflow if (un <= UVARNUM_MAX / 2) un = 2 * un + (uvarnumber_T)(*ptr - '0'); else un = UVARNUM_MAX; ++ptr; if (n++ == maxlen) break; if ((what & STR2NR_QUOTE) && *ptr == '\'' && '0' <= ptr[1] && ptr[1] <= '1') { ++ptr; if (n++ == maxlen) break; } } } else if (pre == 'O' || pre == 'o' || pre == '0' || ((what & STR2NR_OCT) && (what & STR2NR_FORCE))) { // octal if (pre != 0 && pre != '0') n += 2; // skip over "0o" while ('0' <= *ptr && *ptr <= '7') { // avoid ubsan error for overflow if (un <= UVARNUM_MAX / 8) un = 8 * un + (uvarnumber_T)(*ptr - '0'); else un = UVARNUM_MAX; ++ptr; if (n++ == maxlen) break; if ((what & STR2NR_QUOTE) && *ptr == '\'' && '0' <= ptr[1] && ptr[1] <= '7') { ++ptr; if (n++ == maxlen) break; } } } else if (pre != 0 || ((what & STR2NR_HEX) && (what & STR2NR_FORCE))) { // hex if (pre != 0) n += 2; // skip over "0x" while (vim_isxdigit(*ptr)) { // avoid ubsan error for overflow if (un <= UVARNUM_MAX / 16) un = 16 * un + (uvarnumber_T)hex2nr(*ptr); else un = UVARNUM_MAX; ++ptr; if (n++ == maxlen) break; if ((what & STR2NR_QUOTE) && *ptr == '\'' && vim_isxdigit(ptr[1])) { ++ptr; if (n++ == maxlen) break; } } } else { // decimal while (VIM_ISDIGIT(*ptr)) { uvarnumber_T digit = (uvarnumber_T)(*ptr - '0'); // avoid ubsan error for overflow if (un < UVARNUM_MAX / 10 || (un == UVARNUM_MAX / 10 && digit <= UVARNUM_MAX % 10)) un = 10 * un + digit; else un = UVARNUM_MAX; ++ptr; if (n++ == maxlen) break; if ((what & STR2NR_QUOTE) && *ptr == '\'' && VIM_ISDIGIT(ptr[1])) { ++ptr; if (n++ == maxlen) break; } } } // Check for an alphanumeric character immediately following, that is // most likely a typo. if (strict && n - 1 != maxlen && ASCII_ISALNUM(*ptr)) return; if (prep != NULL) *prep = pre; if (len != NULL) *len = (int)(ptr - start); if (nptr != NULL) { if (negative) // account for leading '-' for decimal numbers { // avoid ubsan error for overflow if (un > VARNUM_MAX) *nptr = VARNUM_MIN; else *nptr = -(varnumber_T)un; } else { if (un > VARNUM_MAX) un = VARNUM_MAX; *nptr = (varnumber_T)un; } } if (unptr != NULL) *unptr = un; } /* * Return the value of a single hex character. * Only valid when the argument is '0' - '9', 'A' - 'F' or 'a' - 'f'. */ int hex2nr(int c) { if (c >= 'a' && c <= 'f') return c - 'a' + 10; if (c >= 'A' && c <= 'F') return c - 'A' + 10; return c - '0'; } #if defined(FEAT_TERMRESPONSE) || defined(FEAT_GUI_GTK) || defined(PROTO) /* * Convert two hex characters to a byte. * Return -1 if one of the characters is not hex. */ int hexhex2nr(char_u *p) { if (!vim_isxdigit(p[0]) || !vim_isxdigit(p[1])) return -1; return (hex2nr(p[0]) << 4) + hex2nr(p[1]); } #endif /* * Return TRUE if "str" starts with a backslash that should be removed. * For MS-DOS, MSWIN and OS/2 this is only done when the character after the * backslash is not a normal file name character. * '$' is a valid file name character, we don't remove the backslash before * it. This means it is not possible to use an environment variable after a * backslash. "C:\$VIM\doc" is taken literally, only "$VIM\doc" works. * Although "\ name" is valid, the backslash in "Program\ files" must be * removed. Assume a file name doesn't start with a space. * For multi-byte names, never remove a backslash before a non-ascii * character, assume that all multi-byte characters are valid file name * characters. */ int rem_backslash(char_u *str) { #ifdef BACKSLASH_IN_FILENAME return (str[0] == '\\' && str[1] < 0x80 && (str[1] == ' ' || (str[1] != NUL && str[1] != '*' && str[1] != '?' && !vim_isfilec(str[1])))); #else return (str[0] == '\\' && str[1] != NUL); #endif } /* * Halve the number of backslashes in a file name argument. * For MS-DOS we only do this if the character after the backslash * is not a normal file character. */ void backslash_halve(char_u *p) { for ( ; *p; ++p) if (rem_backslash(p)) STRMOVE(p, p + 1); } /* * backslash_halve() plus save the result in allocated memory. * However, returns "p" when out of memory. */ char_u * backslash_halve_save(char_u *p) { char_u *res; res = vim_strsave(p); if (res == NULL) return p; backslash_halve(res); return res; } #if (defined(EBCDIC) && defined(FEAT_POSTSCRIPT)) || defined(PROTO) /* * Table for EBCDIC to ASCII conversion unashamedly taken from xxd.c! * The first 64 entries have been added to map control characters defined in * ascii.h */ static char_u ebcdic2ascii_tab[256] = { 0000, 0001, 0002, 0003, 0004, 0011, 0006, 0177, 0010, 0011, 0012, 0013, 0014, 0015, 0016, 0017, 0020, 0021, 0022, 0023, 0024, 0012, 0010, 0027, 0030, 0031, 0032, 0033, 0033, 0035, 0036, 0037, 0040, 0041, 0042, 0043, 0044, 0045, 0046, 0047, 0050, 0051, 0052, 0053, 0054, 0055, 0056, 0057, 0060, 0061, 0062, 0063, 0064, 0065, 0066, 0067, 0070, 0071, 0072, 0073, 0074, 0075, 0076, 0077, 0040, 0240, 0241, 0242, 0243, 0244, 0245, 0246, 0247, 0250, 0325, 0056, 0074, 0050, 0053, 0174, 0046, 0251, 0252, 0253, 0254, 0255, 0256, 0257, 0260, 0261, 0041, 0044, 0052, 0051, 0073, 0176, 0055, 0057, 0262, 0263, 0264, 0265, 0266, 0267, 0270, 0271, 0313, 0054, 0045, 0137, 0076, 0077, 0272, 0273, 0274, 0275, 0276, 0277, 0300, 0301, 0302, 0140, 0072, 0043, 0100, 0047, 0075, 0042, 0303, 0141, 0142, 0143, 0144, 0145, 0146, 0147, 0150, 0151, 0304, 0305, 0306, 0307, 0310, 0311, 0312, 0152, 0153, 0154, 0155, 0156, 0157, 0160, 0161, 0162, 0136, 0314, 0315, 0316, 0317, 0320, 0321, 0345, 0163, 0164, 0165, 0166, 0167, 0170, 0171, 0172, 0322, 0323, 0324, 0133, 0326, 0327, 0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337, 0340, 0341, 0342, 0343, 0344, 0135, 0346, 0347, 0173, 0101, 0102, 0103, 0104, 0105, 0106, 0107, 0110, 0111, 0350, 0351, 0352, 0353, 0354, 0355, 0175, 0112, 0113, 0114, 0115, 0116, 0117, 0120, 0121, 0122, 0356, 0357, 0360, 0361, 0362, 0363, 0134, 0237, 0123, 0124, 0125, 0126, 0127, 0130, 0131, 0132, 0364, 0365, 0366, 0367, 0370, 0371, 0060, 0061, 0062, 0063, 0064, 0065, 0066, 0067, 0070, 0071, 0372, 0373, 0374, 0375, 0376, 0377 }; /* * Convert a buffer worth of characters from EBCDIC to ASCII. Only useful if * wanting 7-bit ASCII characters out the other end. */ void ebcdic2ascii(char_u *buffer, int len) { int i; for (i = 0; i < len; i++) buffer[i] = ebcdic2ascii_tab[buffer[i]]; } #endif