1 | #include <libintl.h>
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2 | #include <stdlib.h>
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3 | #include <string.h>
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4 | #include <errno.h>
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5 | #include <limits.h>
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6 | #include <sys/stat.h>
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7 | #include <ctype.h>
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8 | #include "locale_impl.h"
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9 | #include "libc.h"
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10 | #include "atomic.h"
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11 |
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12 | struct binding {
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13 | struct binding *next;
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14 | int dirlen;
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15 | volatile int active;
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16 | char *domainname;
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17 | char *dirname;
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18 | char buf[];
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19 | };
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20 |
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21 | static void *volatile bindings;
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22 |
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23 | static char *gettextdir(const char *domainname, size_t *dirlen)
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24 | {
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25 | struct binding *p;
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26 | for (p=bindings; p; p=p->next) {
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27 | if (!strcmp(p->domainname, domainname) && p->active) {
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28 | *dirlen = p->dirlen;
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29 | return (char *)p->dirname;
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30 | }
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31 | }
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32 | return 0;
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33 | }
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34 |
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35 | char *bindtextdomain(const char *domainname, const char *dirname)
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36 | {
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37 | static volatile int lock[2];
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38 | struct binding *p, *q;
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39 |
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40 | if (!domainname) return 0;
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41 | if (!dirname) return gettextdir(domainname, &(size_t){0});
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42 |
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43 | size_t domlen = strnlen(domainname, NAME_MAX+1);
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44 | size_t dirlen = strnlen(dirname, PATH_MAX);
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45 | if (domlen > NAME_MAX || dirlen >= PATH_MAX) {
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46 | errno = EINVAL;
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47 | return 0;
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48 | }
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49 |
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50 | LOCK(lock);
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51 |
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52 | for (p=bindings; p; p=p->next) {
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53 | if (!strcmp(p->domainname, domainname) &&
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54 | !strcmp(p->dirname, dirname)) {
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55 | break;
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56 | }
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57 | }
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58 |
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59 | if (!p) {
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60 | p = calloc(sizeof *p + domlen + dirlen + 2, 1);
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61 | if (!p) {
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62 | UNLOCK(lock);
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63 | return 0;
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64 | }
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65 | p->next = bindings;
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66 | p->dirlen = dirlen;
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67 | p->domainname = p->buf;
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68 | p->dirname = p->buf + domlen + 1;
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69 | memcpy(p->domainname, domainname, domlen+1);
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70 | memcpy(p->dirname, dirname, dirlen+1);
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71 | a_cas_p(&bindings, bindings, p);
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72 | }
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73 |
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74 | a_store(&p->active, 1);
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75 |
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76 | for (q=bindings; q; q=q->next) {
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77 | if (!strcmp(q->domainname, domainname) && q != p)
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78 | a_store(&q->active, 0);
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79 | }
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80 |
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81 | UNLOCK(lock);
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82 |
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83 | return (char *)p->dirname;
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84 | }
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85 |
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86 | static const char catnames[][12] = {
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87 | "LC_CTYPE",
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88 | "LC_NUMERIC",
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89 | "LC_TIME",
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90 | "LC_COLLATE",
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91 | "LC_MONETARY",
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92 | "LC_MESSAGES",
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93 | };
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94 |
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95 | static const char catlens[] = { 8, 10, 7, 10, 11, 11 };
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96 |
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97 | struct msgcat {
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98 | struct msgcat *next;
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99 | const void *map;
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100 | size_t map_size;
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101 | void *volatile plural_rule;
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102 | volatile int nplurals;
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103 | struct binding *binding;
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104 | const struct __locale_map *lm;
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105 | int cat;
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106 | };
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107 |
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108 | static char *dummy_gettextdomain()
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109 | {
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110 | return "messages";
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111 | }
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112 |
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113 | weak_alias(dummy_gettextdomain, __gettextdomain);
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114 |
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115 | const unsigned char *__map_file(const char *, size_t *);
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116 | int __munmap(void *, size_t);
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117 | unsigned long __pleval(const char *, unsigned long);
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118 |
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119 | char *dcngettext(const char *domainname, const char *msgid1, const char *msgid2, unsigned long int n, int category)
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120 | {
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121 | static struct msgcat *volatile cats;
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122 | struct msgcat *p;
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123 | struct __locale_struct *loc = CURRENT_LOCALE;
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124 | const struct __locale_map *lm;
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125 | size_t domlen;
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126 | struct binding *q;
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127 |
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128 | if ((unsigned)category >= LC_ALL) goto notrans;
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129 |
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130 | if (!domainname) domainname = __gettextdomain();
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131 |
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132 | domlen = strnlen(domainname, NAME_MAX+1);
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133 | if (domlen > NAME_MAX) goto notrans;
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134 |
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135 | for (q=bindings; q; q=q->next)
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136 | if (!strcmp(q->domainname, domainname) && q->active)
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137 | break;
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138 | if (!q) goto notrans;
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139 |
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140 | lm = loc->cat[category];
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141 | if (!lm) {
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142 | notrans:
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143 | return (char *) ((n == 1) ? msgid1 : msgid2);
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144 | }
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145 |
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146 | for (p=cats; p; p=p->next)
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147 | if (p->binding == q && p->lm == lm && p->cat == category)
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148 | break;
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149 |
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150 | if (!p) {
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151 | const char *dirname, *locname, *catname, *modname, *locp;
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152 | size_t dirlen, loclen, catlen, modlen, alt_modlen;
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153 | void *old_cats;
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154 | size_t map_size;
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155 |
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156 | dirname = q->dirname;
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157 | locname = lm->name;
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158 | catname = catnames[category];
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159 |
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160 | dirlen = q->dirlen;
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161 | loclen = strlen(locname);
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162 | catlen = catlens[category];
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163 |
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164 | /* Logically split @mod suffix from locale name. */
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165 | modname = memchr(locname, '@', loclen);
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166 | if (!modname) modname = locname + loclen;
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167 | alt_modlen = modlen = loclen - (modname-locname);
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168 | loclen = modname-locname;
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169 |
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170 | /* Drop .charset identifier; it is not used. */
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171 | const char *csp = memchr(locname, '.', loclen);
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172 | if (csp) loclen = csp-locname;
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173 |
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174 | char name[dirlen+1 + loclen+modlen+1 + catlen+1 + domlen+3 + 1];
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175 | const void *map;
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176 |
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177 | for (;;) {
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178 | snprintf(name, sizeof name, "%s/%.*s%.*s/%s/%s.mo\0",
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179 | dirname, (int)loclen, locname,
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180 | (int)alt_modlen, modname, catname, domainname);
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181 | if (map = __map_file(name, &map_size)) break;
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182 |
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183 | /* Try dropping @mod, _YY, then both. */
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184 | if (alt_modlen) {
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185 | alt_modlen = 0;
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186 | } else if ((locp = memchr(locname, '_', loclen))) {
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187 | loclen = locp-locname;
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188 | alt_modlen = modlen;
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189 | } else {
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190 | break;
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191 | }
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192 | }
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193 | if (!map) goto notrans;
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194 |
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195 | p = calloc(sizeof *p, 1);
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196 | if (!p) {
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197 | __munmap((void *)map, map_size);
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198 | goto notrans;
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199 | }
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200 | p->cat = category;
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201 | p->binding = q;
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202 | p->lm = lm;
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203 | p->map = map;
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204 | p->map_size = map_size;
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205 | do {
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206 | old_cats = cats;
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207 | p->next = old_cats;
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208 | } while (a_cas_p(&cats, old_cats, p) != old_cats);
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209 | }
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210 |
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211 | const char *trans = __mo_lookup(p->map, p->map_size, msgid1);
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212 | if (!trans) goto notrans;
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213 |
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214 | /* Non-plural-processing gettext forms pass a null pointer as
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215 | * msgid2 to request that dcngettext suppress plural processing. */
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216 | if (!msgid2) return (char *)trans;
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217 |
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218 | if (!p->plural_rule) {
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219 | const char *rule = "n!=1;";
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220 | unsigned long np = 2;
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221 | const char *r = __mo_lookup(p->map, p->map_size, "");
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222 | char *z;
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223 | while (r && strncmp(r, "Plural-Forms:", 13)) {
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224 | z = strchr(r, '\n');
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225 | r = z ? z+1 : 0;
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226 | }
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227 | if (r) {
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228 | r += 13;
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229 | while (isspace(*r)) r++;
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230 | if (!strncmp(r, "nplurals=", 9)) {
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231 | np = strtoul(r+9, &z, 10);
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232 | r = z;
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233 | }
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234 | while (*r && *r != ';') r++;
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235 | if (*r) {
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236 | r++;
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237 | while (isspace(*r)) r++;
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238 | if (!strncmp(r, "plural=", 7))
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239 | rule = r+7;
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240 | }
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241 | }
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242 | a_store(&p->nplurals, np);
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243 | a_cas_p(&p->plural_rule, 0, (void *)rule);
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244 | }
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245 | if (p->nplurals) {
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246 | unsigned long plural = __pleval(p->plural_rule, n);
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247 | if (plural > p->nplurals) goto notrans;
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248 | while (plural--) {
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249 | size_t rem = p->map_size - (trans - (char *)p->map);
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250 | size_t l = strnlen(trans, rem);
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251 | if (l+1 >= rem)
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252 | goto notrans;
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253 | trans += l+1;
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254 | }
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255 | }
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256 | return (char *)trans;
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257 | }
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258 |
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259 | char *dcgettext(const char *domainname, const char *msgid, int category)
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260 | {
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261 | return dcngettext(domainname, msgid, 0, 1, category);
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262 | }
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263 |
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264 | char *dngettext(const char *domainname, const char *msgid1, const char *msgid2, unsigned long int n)
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265 | {
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266 | return dcngettext(domainname, msgid1, msgid2, n, LC_MESSAGES);
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267 | }
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268 |
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269 | char *dgettext(const char *domainname, const char *msgid)
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270 | {
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271 | return dcngettext(domainname, msgid, 0, 1, LC_MESSAGES);
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272 | }
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