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annotate src/spell.h @ 20779:0eb9578c85b1

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Added tag v8.2.0941 for changeset 6d5e233bac9cb430a0d13249a22071c1387dbcae
author Bram Moolenaar <Bram@vim.org>
date Wed, 10 Jun 2020 12:30:05 +0200
parents 6e3dc2d630c2
children 11055d5b74a7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* vi:set ts=8 sts=4 sw=4 noet:
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2 *
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3 * VIM - Vi IMproved by Bram Moolenaar
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4 *
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5 * Do ":help uganda" in Vim to read copying and usage conditions.
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6 * Do ":help credits" in Vim to see a list of people who contributed.
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7 * See README.txt for an overview of the Vim source code.
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8 */
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9
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10 /*
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11 * spell.h: common code for spell checking, used by spell.c and spellfile.c.
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12 */
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13
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14 // Use SPELL_PRINTTREE for debugging: dump the word tree after adding a word.
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15 // Only use it for small word lists!
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16 #if 0
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17 # define SPELL_PRINTTREE
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18 #endif
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19
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20 // Use SPELL_COMPRESS_ALLWAYS for debugging: compress the word tree after
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21 // adding a word. Only use it for small word lists!
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22 #if 0
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23 # define SPELL_COMPRESS_ALLWAYS
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24 #endif
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26 // Use DEBUG_TRIEWALK to print the changes made in suggest_trie_walk() for a
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27 // specific word.
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28 #if 0
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29 # define DEBUG_TRIEWALK
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30 #endif
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31
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32 #define MAXWLEN 254 // Assume max. word len is this many bytes.
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33 // Some places assume a word length fits in a
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34 // byte, thus it can't be above 255.
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35 // Must be >= PFD_NOTSPECIAL.
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36
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37 #define MAXREGIONS 8 // Number of regions supported.
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39 // Type used for indexes in the word tree need to be at least 4 bytes. If int
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40 // is 8 bytes we could use something smaller, but what?
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41 typedef int idx_T;
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43 typedef int salfirst_T;
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45 /*
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46 * Structure used to store words and other info for one language, loaded from
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47 * a .spl file.
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48 * The main access is through the tree in "sl_fbyts/sl_fidxs", storing the
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49 * case-folded words. "sl_kbyts/sl_kidxs" is for keep-case words.
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50 *
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51 * The "byts" array stores the possible bytes in each tree node, preceded by
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52 * the number of possible bytes, sorted on byte value:
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53 * <len> <byte1> <byte2> ...
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54 * The "idxs" array stores the index of the child node corresponding to the
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55 * byte in "byts".
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56 * Exception: when the byte is zero, the word may end here and "idxs" holds
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57 * the flags, region mask and affixID for the word. There may be several
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58 * zeros in sequence for alternative flag/region/affixID combinations.
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59 */
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60 typedef struct slang_S slang_T;
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61 struct slang_S
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62 {
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63 slang_T *sl_next; // next language
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64 char_u *sl_name; // language name "en", "en.rare", "nl", etc.
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65 char_u *sl_fname; // name of .spl file
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66 int sl_add; // TRUE if it's a .add file.
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67
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68 char_u *sl_fbyts; // case-folded word bytes
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69 idx_T *sl_fidxs; // case-folded word indexes
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70 char_u *sl_kbyts; // keep-case word bytes
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71 idx_T *sl_kidxs; // keep-case word indexes
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72 char_u *sl_pbyts; // prefix tree word bytes
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73 idx_T *sl_pidxs; // prefix tree word indexes
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74
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75 char_u *sl_info; // infotext string or NULL
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76
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77 char_u sl_regions[MAXREGIONS * 2 + 1];
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78 // table with up to 8 region names plus NUL
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79
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80 char_u *sl_midword; // MIDWORD string or NULL
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81
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82 hashtab_T sl_wordcount; // hashtable with word count, wordcount_T
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83
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84 int sl_compmax; // COMPOUNDWORDMAX (default: MAXWLEN)
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85 int sl_compminlen; // COMPOUNDMIN (default: 0)
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86 int sl_compsylmax; // COMPOUNDSYLMAX (default: MAXWLEN)
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87 int sl_compoptions; // COMP_* flags
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88 garray_T sl_comppat; // CHECKCOMPOUNDPATTERN items
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89 regprog_T *sl_compprog; // COMPOUNDRULE turned into a regexp progrm
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90 // (NULL when no compounding)
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91 char_u *sl_comprules; // all COMPOUNDRULE concatenated (or NULL)
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92 char_u *sl_compstartflags; // flags for first compound word
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93 char_u *sl_compallflags; // all flags for compound words
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94 char_u sl_nobreak; // When TRUE: no spaces between words
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95 char_u *sl_syllable; // SYLLABLE repeatable chars or NULL
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96 garray_T sl_syl_items; // syllable items
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97
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98 int sl_prefixcnt; // number of items in "sl_prefprog"
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99 regprog_T **sl_prefprog; // table with regprogs for prefixes
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100
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101 garray_T sl_rep; // list of fromto_T entries from REP lines
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102 short sl_rep_first[256]; // indexes where byte first appears, -1 if
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103 // there is none
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104 garray_T sl_sal; // list of salitem_T entries from SAL lines
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105 salfirst_T sl_sal_first[256]; // indexes where byte first appears, -1 if
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106 // there is none
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107 int sl_followup; // SAL followup
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108 int sl_collapse; // SAL collapse_result
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109 int sl_rem_accents; // SAL remove_accents
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110 int sl_sofo; // SOFOFROM and SOFOTO instead of SAL items:
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111 // "sl_sal_first" maps chars, when has_mbyte
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112 // "sl_sal" is a list of wide char lists.
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113 garray_T sl_repsal; // list of fromto_T entries from REPSAL lines
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114 short sl_repsal_first[256]; // sl_rep_first for REPSAL lines
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115 int sl_nosplitsugs; // don't suggest splitting a word
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116 int sl_nocompoundsugs; // don't suggest compounding
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117
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118 // Info from the .sug file. Loaded on demand.
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119 time_t sl_sugtime; // timestamp for .sug file
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120 char_u *sl_sbyts; // soundfolded word bytes
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121 idx_T *sl_sidxs; // soundfolded word indexes
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122 buf_T *sl_sugbuf; // buffer with word number table
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123 int sl_sugloaded; // TRUE when .sug file was loaded or failed to
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124 // load
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125
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126 int sl_has_map; // TRUE if there is a MAP line
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127 hashtab_T sl_map_hash; // MAP for multi-byte chars
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128 int sl_map_array[256]; // MAP for first 256 chars
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129 hashtab_T sl_sounddone; // table with soundfolded words that have
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130 // handled, see add_sound_suggest()
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131 };
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132
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133 #ifdef VMS
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134 # define SPL_FNAME_TMPL "%s_%s.spl"
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135 # define SPL_FNAME_ADD "_add."
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136 # define SPL_FNAME_ASCII "_ascii."
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137 #else
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138 # define SPL_FNAME_TMPL "%s.%s.spl"
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139 # define SPL_FNAME_ADD ".add."
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140 # define SPL_FNAME_ASCII ".ascii."
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141 #endif
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142
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143 // Flags used for a word. Only the lowest byte can be used, the region byte
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144 // comes above it.
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145 #define WF_REGION 0x01 // region byte follows
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146 #define WF_ONECAP 0x02 // word with one capital (or all capitals)
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147 #define WF_ALLCAP 0x04 // word must be all capitals
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148 #define WF_RARE 0x08 // rare word
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149 #define WF_BANNED 0x10 // bad word
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150 #define WF_AFX 0x20 // affix ID follows
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151 #define WF_FIXCAP 0x40 // keep-case word, allcap not allowed
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152 #define WF_KEEPCAP 0x80 // keep-case word
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153
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154 #define WF_CAPMASK (WF_ONECAP | WF_ALLCAP | WF_KEEPCAP | WF_FIXCAP)
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155
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156 // for <flags2>, shifted up one byte to be used in wn_flags
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157 #define WF_HAS_AFF 0x0100 // word includes affix
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158 #define WF_NEEDCOMP 0x0200 // word only valid in compound
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159 #define WF_NOSUGGEST 0x0400 // word not to be suggested
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160 #define WF_COMPROOT 0x0800 // already compounded word, COMPOUNDROOT
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161 #define WF_NOCOMPBEF 0x1000 // no compounding before this word
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162 #define WF_NOCOMPAFT 0x2000 // no compounding after this word
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163
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164 // flags for <pflags>
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165 #define WFP_RARE 0x01 // rare prefix
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166 #define WFP_NC 0x02 // prefix is not combining
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167 #define WFP_UP 0x04 // to-upper prefix
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168 #define WFP_COMPPERMIT 0x08 // prefix with COMPOUNDPERMITFLAG
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169 #define WFP_COMPFORBID 0x10 // prefix with COMPOUNDFORBIDFLAG
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170
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171 // Flags for postponed prefixes in "sl_pidxs". Must be above affixID (one
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172 // byte) and prefcondnr (two bytes).
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173 #define WF_RAREPFX (WFP_RARE << 24) // rare postponed prefix
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174 #define WF_PFX_NC (WFP_NC << 24) // non-combining postponed prefix
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175 #define WF_PFX_UP (WFP_UP << 24) // to-upper postponed prefix
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176 #define WF_PFX_COMPPERMIT (WFP_COMPPERMIT << 24) // postponed prefix with
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177 // COMPOUNDPERMITFLAG
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178 #define WF_PFX_COMPFORBID (WFP_COMPFORBID << 24) // postponed prefix with
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179 // COMPOUNDFORBIDFLAG
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180
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181 // flags for <compoptions>
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182 #define COMP_CHECKDUP 1 // CHECKCOMPOUNDDUP
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183 #define COMP_CHECKREP 2 // CHECKCOMPOUNDREP
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184 #define COMP_CHECKCASE 4 // CHECKCOMPOUNDCASE
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185 #define COMP_CHECKTRIPLE 8 // CHECKCOMPOUNDTRIPLE
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186
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187 // Info from "REP", "REPSAL" and "SAL" entries in ".aff" file used in si_rep,
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188 // si_repsal, sl_rep, and si_sal. Not for sl_sal!
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189 // One replacement: from "ft_from" to "ft_to".
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190 typedef struct fromto_S
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191 {
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192 char_u *ft_from;
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193 char_u *ft_to;
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194 } fromto_T;
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195
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196 // Info from "SAL" entries in ".aff" file used in sl_sal.
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197 // The info is split for quick processing by spell_soundfold().
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198 // Note that "sm_oneof" and "sm_rules" point into sm_lead.
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199 typedef struct salitem_S
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200 {
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201 char_u *sm_lead; // leading letters
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202 int sm_leadlen; // length of "sm_lead"
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203 char_u *sm_oneof; // letters from () or NULL
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204 char_u *sm_rules; // rules like ^, $, priority
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205 char_u *sm_to; // replacement.
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206 int *sm_lead_w; // wide character copy of "sm_lead"
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207 int *sm_oneof_w; // wide character copy of "sm_oneof"
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208 int *sm_to_w; // wide character copy of "sm_to"
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209 } salitem_T;
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210
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211 // Values for SP_*ERROR are negative, positive values are used by
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212 // read_cnt_string().
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213 #define SP_TRUNCERROR -1 // spell file truncated error
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214 #define SP_FORMERROR -2 // format error in spell file
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215 #define SP_OTHERERROR -3 // other error while reading spell file
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216
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217 /*
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218 * Structure used in "b_langp", filled from 'spelllang'.
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219 */
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220 typedef struct langp_S
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221 {
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222 slang_T *lp_slang; // info for this language
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223 slang_T *lp_sallang; // language used for sound folding or NULL
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224 slang_T *lp_replang; // language used for REP items or NULL
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225 int lp_region; // bitmask for region or REGION_ALL
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226 } langp_T;
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227
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228 #define LANGP_ENTRY(ga, i) (((langp_T *)(ga).ga_data) + (i))
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229
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230 #define VIMSUGMAGIC "VIMsug" // string at start of Vim .sug file
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231 #define VIMSUGMAGICL 6
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232 #define VIMSUGVERSION 1
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233
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234 /*
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235 * The tables used for recognizing word characters according to spelling.
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236 * These are only used for the first 256 characters of 'encoding'.
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237 */
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238 typedef struct spelltab_S
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239 {
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240 char_u st_isw[256]; // flags: is word char
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241 char_u st_isu[256]; // flags: is uppercase char
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242 char_u st_fold[256]; // chars: folded case
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243 char_u st_upper[256]; // chars: upper case
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244 } spelltab_T;
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245
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246 /*
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247 * Use our own character-case definitions, because the current locale may
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248 * differ from what the .spl file uses.
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249 * These must not be called with negative number!
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250 */
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251 #if defined(HAVE_WCHAR_H)
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252 # include <wchar.h> // for towupper() and towlower()
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253 #endif
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254 // Multi-byte implementation. For Unicode we can call utf_*(), but don't do
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255 // that for ASCII, because we don't want to use 'casemap' here. Otherwise use
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256 // the "w" library function for characters above 255 if available.
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257 #ifdef HAVE_TOWLOWER
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258 # define SPELL_TOFOLD(c) (enc_utf8 && (c) >= 128 ? utf_fold(c) \
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259 : (c) < 256 ? (int)spelltab.st_fold[c] : (int)towlower(c))
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260 #else
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261 # define SPELL_TOFOLD(c) (enc_utf8 && (c) >= 128 ? utf_fold(c) \
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262 : (c) < 256 ? (int)spelltab.st_fold[c] : (c))
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263 #endif
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264
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265 #ifdef HAVE_TOWUPPER
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266 # define SPELL_TOUPPER(c) (enc_utf8 && (c) >= 128 ? utf_toupper(c) \
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267 : (c) < 256 ? (int)spelltab.st_upper[c] : (int)towupper(c))
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268 #else
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269 # define SPELL_TOUPPER(c) (enc_utf8 && (c) >= 128 ? utf_toupper(c) \
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270 : (c) < 256 ? (int)spelltab.st_upper[c] : (c))
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271 #endif
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272
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273 #ifdef HAVE_ISWUPPER
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274 # define SPELL_ISUPPER(c) (enc_utf8 && (c) >= 128 ? utf_isupper(c) \
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275 : (c) < 256 ? spelltab.st_isu[c] : iswupper(c))
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276 #else
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277 # define SPELL_ISUPPER(c) (enc_utf8 && (c) >= 128 ? utf_isupper(c) \
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278 : (c) < 256 ? spelltab.st_isu[c] : (FALSE))
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279 #endif
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280
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281 #ifdef FEAT_SPELL
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282 // First language that is loaded, start of the linked list of loaded
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283 // languages.
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284 # ifdef IN_SPELL_C
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285 # define SPELL_EXTERN
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286 # define SPELL_INIT(x) x
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287 # else
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288 # define SPELL_EXTERN extern
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289 # define SPELL_INIT(x)
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290 # endif
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291
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292 SPELL_EXTERN slang_T *first_lang SPELL_INIT(= NULL);
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293
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294 // file used for "zG" and "zW"
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295 SPELL_EXTERN char_u *int_wordlist SPELL_INIT(= NULL);
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296
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297
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298 SPELL_EXTERN char e_format[] SPELL_INIT(= N_("E759: Format error in spell file"));
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299
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300 SPELL_EXTERN spelltab_T spelltab;
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301 SPELL_EXTERN int did_set_spelltab;
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302
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303 // Values for "what" argument of spell_add_word()
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304 #define SPELL_ADD_GOOD 0
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305 #define SPELL_ADD_BAD 1
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306 #define SPELL_ADD_RARE 2
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307
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308 typedef struct wordcount_S
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309 {
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310 short_u wc_count; // nr of times word was seen
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311 char_u wc_word[1]; // word, actually longer
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312 } wordcount_T;
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313
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314 #define WC_KEY_OFF offsetof(wordcount_T, wc_word)
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315 #define HI2WC(hi) ((wordcount_T *)((hi)->hi_key - WC_KEY_OFF))
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316 #define MAXWORDCOUNT 0xffff
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317
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318 // Remember what "z?" replaced.
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319 SPELL_EXTERN char_u *repl_from SPELL_INIT(= NULL);
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320 SPELL_EXTERN char_u *repl_to SPELL_INIT(= NULL);
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321 #endif