1 | /* |
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2 | * buildhash.c - make a hash table for ispell |
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3 | * |
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4 | * Pace Willisson, 1983 |
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5 | */ |
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6 | |
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7 | #include <stdio.h> |
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8 | #include <sys/types.h> |
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9 | #include <sys/stat.h> |
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10 | #include <sys/param.h> |
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11 | #include "ispell.h" |
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12 | #include "config.h" |
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13 | |
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14 | #define NSTAT 100 |
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15 | struct stat dstat, cstat; |
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16 | |
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17 | int numwords, hashsize; |
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18 | |
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19 | char *malloc(); |
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20 | |
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21 | struct dent *hashtbl; |
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22 | |
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23 | char *Dfile; |
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24 | char *Hfile; |
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25 | |
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26 | char Cfile[MAXPATHLEN]; |
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27 | char Sfile[MAXPATHLEN]; |
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28 | |
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29 | main (argc,argv) |
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30 | int argc; |
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31 | char **argv; |
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32 | { |
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33 | FILE *countf; |
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34 | FILE *statf; |
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35 | int stats[NSTAT]; |
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36 | int i; |
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37 | |
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38 | if (argc > 1) { |
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39 | ++argv; |
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40 | Dfile = *argv; |
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41 | if (argc > 2) { |
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42 | ++argv; |
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43 | Hfile = *argv; |
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44 | } |
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45 | else |
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46 | Hfile = DEFHASH; |
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47 | } |
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48 | else { |
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49 | Dfile = DEFDICT; |
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50 | Hfile = DEFHASH; |
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51 | } |
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52 | |
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53 | (void) sprintf(Cfile,"%s.cnt",Dfile); |
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54 | (void) sprintf(Sfile,"%s.stat",Dfile); |
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55 | |
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56 | if (stat (Dfile, &dstat) < 0) { |
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57 | fprintf (stderr, "No dictionary (%s)\n", Dfile); |
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58 | exit (1); |
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59 | } |
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60 | |
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61 | if (stat (Cfile, &cstat) < 0 || dstat.st_mtime > cstat.st_mtime) |
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62 | newcount (); |
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63 | |
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64 | if ((countf = fopen (Cfile, "r")) == NULL) { |
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65 | fprintf (stderr, "No count file\n"); |
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66 | exit (1); |
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67 | } |
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68 | numwords = 0; |
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69 | (void) fscanf (countf, "%d", &numwords); |
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70 | (void) fclose (countf); |
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71 | if (numwords == 0) { |
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72 | fprintf (stderr, "Bad count file\n"); |
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73 | exit (1); |
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74 | } |
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75 | hashsize = numwords; |
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76 | readdict (); |
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77 | |
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78 | if ((statf = fopen (Sfile, "w")) == NULL) { |
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79 | fprintf (stderr, "Can't create %s\n", Sfile); |
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80 | exit (1); |
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81 | } |
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82 | |
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83 | for (i = 0; i < NSTAT; i++) |
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84 | stats[i] = 0; |
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85 | for (i = 0; i < hashsize; i++) { |
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86 | struct dent *dp; |
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87 | int j; |
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88 | if (hashtbl[i].used == 0) { |
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89 | stats[0]++; |
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90 | } else { |
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91 | for (j = 1, dp = &hashtbl[i]; dp->next != NULL; j++, dp = dp->next) |
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92 | ; |
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93 | if (j >= NSTAT) |
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94 | j = NSTAT - 1; |
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95 | stats[j]++; |
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96 | } |
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97 | } |
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98 | for (i = 0; i < NSTAT; i++) |
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99 | fprintf (statf, "%d: %d\n", i, stats[i]); |
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100 | (void) fclose (statf); |
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101 | |
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102 | filltable (); |
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103 | |
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104 | output (); |
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105 | exit(0); |
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106 | } |
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107 | |
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108 | output () |
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109 | { |
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110 | FILE *outfile; |
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111 | struct hashheader hashheader; |
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112 | int strptr, n, i; |
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113 | |
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114 | if ((outfile = fopen (Hfile, "w")) == NULL) { |
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115 | fprintf (stderr, "can't create %s\n",Hfile); |
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116 | return; |
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117 | } |
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118 | hashheader.magic = MAGIC; |
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119 | hashheader.stringsize = 0; |
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120 | hashheader.tblsize = hashsize; |
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121 | (void) fwrite (&hashheader, sizeof hashheader, 1, outfile); |
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122 | strptr = 0; |
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123 | for (i = 0; i < hashsize; i++) { |
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124 | n = strlen (hashtbl[i].word) + 1; |
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125 | (void) fwrite (hashtbl[i].word, n, 1, outfile); |
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126 | hashtbl[i].word = (char *)strptr; |
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127 | strptr += n; |
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128 | } |
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129 | for (i = 0; i < hashsize; i++) { |
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130 | if (hashtbl[i].next != 0) { |
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131 | int x; |
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132 | x = hashtbl[i].next - hashtbl; |
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133 | hashtbl[i].next = (struct dent *)x; |
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134 | } else { |
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135 | hashtbl[i].next = (struct dent *)-1; |
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136 | } |
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137 | } |
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138 | (void) fwrite (hashtbl, sizeof (struct dent), hashsize, outfile); |
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139 | hashheader.stringsize = strptr; |
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140 | rewind (outfile); |
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141 | (void) fwrite (&hashheader, sizeof hashheader, 1, outfile); |
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142 | (void) fclose (outfile); |
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143 | } |
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144 | |
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145 | filltable () |
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146 | { |
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147 | struct dent *freepointer, *nextword, *dp; |
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148 | int i; |
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149 | |
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150 | for (freepointer = hashtbl; freepointer->used; freepointer++) |
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151 | ; |
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152 | for (nextword = hashtbl, i = numwords; i != 0; nextword++, i--) { |
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153 | if (nextword->used == 0) { |
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154 | continue; |
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155 | } |
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156 | if (nextword->next == NULL) { |
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157 | continue; |
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158 | } |
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159 | if (nextword->next >= hashtbl && nextword->next < hashtbl + hashsize) { |
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160 | continue; |
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161 | } |
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162 | dp = nextword; |
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163 | while (dp->next) { |
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164 | if (freepointer > hashtbl + hashsize) { |
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165 | fprintf (stderr, "table overflow\n"); |
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166 | getchar (); |
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167 | break; |
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168 | } |
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169 | *freepointer = *(dp->next); |
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170 | dp->next = freepointer; |
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171 | dp = freepointer; |
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172 | |
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173 | while (freepointer->used) |
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174 | freepointer++; |
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175 | } |
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176 | } |
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177 | } |
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178 | |
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179 | |
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180 | readdict () |
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181 | { |
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182 | struct dent d; |
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183 | char lbuf[100]; |
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184 | FILE *dictf; |
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185 | int i; |
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186 | int h; |
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187 | char *p; |
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188 | |
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189 | if ((dictf = fopen (Dfile, "r")) == NULL) { |
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190 | fprintf (stderr, "Can't open dictionary\n"); |
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191 | exit (1); |
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192 | } |
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193 | |
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194 | hashtbl = (struct dent *) calloc (numwords, sizeof (struct dent)); |
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195 | if (hashtbl == NULL) { |
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196 | fprintf (stderr, "couldn't allocate hash table\n"); |
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197 | exit (1); |
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198 | } |
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199 | |
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200 | i = 0; |
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201 | while (fgets (lbuf, sizeof lbuf, dictf) != NULL) { |
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202 | if ((i & 1023) == 0) { |
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203 | printf ("%d ", i); |
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204 | fflush (stdout); |
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205 | } |
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206 | i++; |
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207 | |
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208 | p = &lbuf [ strlen (lbuf) - 1 ]; |
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209 | if (*p == '\n') |
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210 | *p = 0; |
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211 | |
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212 | if (makedent (lbuf, &d) < 0) |
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213 | continue; |
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214 | |
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215 | d.word = malloc (strlen (lbuf) + 1); |
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216 | if (d.word == NULL) { |
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217 | fprintf (stderr, "couldn't allocate space for word %s\n", lbuf); |
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218 | exit (1); |
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219 | } |
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220 | (void) strcpy (d.word, lbuf); |
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221 | |
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222 | h = hash (lbuf, strlen (lbuf), hashsize); |
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223 | |
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224 | if (hashtbl[h].used == 0) { |
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225 | hashtbl[h] = d; |
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226 | |
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227 | } else { |
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228 | struct dent *dp; |
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229 | |
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230 | dp = (struct dent *) malloc (sizeof (struct dent)); |
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231 | if (dp == NULL) { |
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232 | fprintf (stderr, "couldn't allocate space for collision\n"); |
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233 | exit (1); |
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234 | } |
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235 | *dp = d; |
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236 | dp->next = hashtbl[h].next; |
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237 | hashtbl[h].next = dp; |
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238 | } |
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239 | } |
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240 | printf ("\n"); |
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241 | } |
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242 | |
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243 | /* |
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244 | * fill in the flags in d, and put a null after the word in s |
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245 | */ |
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246 | |
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247 | makedent (lbuf, d) |
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248 | char *lbuf; |
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249 | struct dent *d; |
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250 | { |
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251 | char *p, *index(); |
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252 | |
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253 | d->next = NULL; |
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254 | d->used = 1; |
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255 | d->v_flag = 0; |
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256 | d->n_flag = 0; |
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257 | d->x_flag = 0; |
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258 | d->h_flag = 0; |
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259 | d->y_flag = 0; |
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260 | d->g_flag = 0; |
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261 | d->j_flag = 0; |
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262 | d->d_flag = 0; |
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263 | d->t_flag = 0; |
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264 | d->r_flag = 0; |
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265 | d->z_flag = 0; |
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266 | d->s_flag = 0; |
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267 | d->p_flag = 0; |
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268 | d->m_flag = 0; |
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269 | d->keep = 0; |
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270 | d->keep = 0; |
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271 | |
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272 | p = index (lbuf, '/'); |
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273 | if (p != NULL) |
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274 | *p = 0; |
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275 | if (strlen (lbuf) > WORDLEN - 1) { |
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276 | printf ("%s: word too big\n"); |
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277 | return (-1); |
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278 | } |
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279 | |
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280 | if (p == NULL) |
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281 | return (0); |
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282 | |
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283 | p++; |
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284 | while (*p != '\0' && *p != '\n') { |
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285 | switch (*p) { |
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286 | case 'V': d->v_flag = 1; break; |
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287 | case 'N': d->n_flag = 1; break; |
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288 | case 'X': d->x_flag = 1; break; |
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289 | case 'H': d->h_flag = 1; break; |
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290 | case 'Y': d->y_flag = 1; break; |
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291 | case 'G': d->g_flag = 1; break; |
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292 | case 'J': d->j_flag = 1; break; |
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293 | case 'D': d->d_flag = 1; break; |
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294 | case 'T': d->t_flag = 1; break; |
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295 | case 'R': d->r_flag = 1; break; |
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296 | case 'Z': d->z_flag = 1; break; |
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297 | case 'S': d->s_flag = 1; break; |
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298 | case 'P': d->p_flag = 1; break; |
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299 | case 'M': d->m_flag = 1; break; |
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300 | case 0: |
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301 | fprintf (stderr, "no flags on word %s\n", lbuf); |
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302 | continue; |
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303 | default: |
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304 | fprintf (stderr, "unknown flag %c word %s\n", |
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305 | *p, lbuf); |
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306 | break; |
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307 | } |
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308 | p++; |
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309 | if (*p == '/') /* Handle old-format dictionaries too */ |
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310 | p++; |
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311 | } |
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312 | return (0); |
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313 | } |
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314 | |
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315 | newcount () |
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316 | { |
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317 | char buf[200]; |
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318 | FILE *d; |
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319 | int i; |
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320 | |
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321 | fprintf (stderr, "Counting words in dictionary ...\n"); |
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322 | |
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323 | if ((d = fopen (Dfile, "r")) == NULL) { |
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324 | fprintf (stderr, "Can't open dictionary\n"); |
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325 | exit (1); |
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326 | } |
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327 | |
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328 | for (i = 0; fgets (buf, sizeof buf, d); ) |
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329 | if ((++i & 1023) == 0) { |
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330 | printf ("%d ", i); |
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331 | fflush (stdout); |
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332 | } |
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333 | (void) fclose (d); |
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334 | printf ("\n%d words\n", i); |
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335 | if ((d = fopen (Cfile, "w")) == NULL) { |
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336 | fprintf (stderr, "can't create %s\n", Cfile); |
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337 | exit (1); |
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338 | } |
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339 | fprintf (d, "%d\n", i); |
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340 | (void) fclose (d); |
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341 | } |
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