1 | #include <locale.h>
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2 | #include <string.h>
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3 | #include "locale_impl.h"
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4 | #include "libc.h"
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5 | #include "atomic.h"
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6 |
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7 | const char *__lctrans_impl(const char *msg, const struct __locale_map *lm)
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8 | {
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9 | const char *trans = 0;
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10 | if (lm) trans = __mo_lookup(lm->map, lm->map_size, msg);
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11 | return trans ? trans : msg;
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12 | }
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13 |
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14 | const unsigned char *__map_file(const char *, size_t *);
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15 | int __munmap(void *, size_t);
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16 | char *__strchrnul(const char *, int);
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17 |
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18 | static const char envvars[][12] = {
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19 | "LC_CTYPE",
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20 | "LC_NUMERIC",
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21 | "LC_TIME",
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22 | "LC_COLLATE",
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23 | "LC_MONETARY",
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24 | "LC_MESSAGES",
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25 | };
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26 |
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27 | const struct __locale_map *__get_locale(int cat, const char *val)
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28 | {
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29 | static volatile int lock[2];
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30 | static void *volatile loc_head;
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31 | const struct __locale_map *p;
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32 | struct __locale_map *new = 0;
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33 | const char *path = 0, *z;
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34 | char buf[256];
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35 | size_t l, n;
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36 |
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37 | if (!*val) {
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38 | ((val = getenv("LC_ALL")) && *val) ||
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39 | ((val = getenv(envvars[cat])) && *val) ||
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40 | ((val = getenv("LANG")) && *val) ||
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41 | (val = "C.UTF-8");
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42 | }
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43 |
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44 | /* Limit name length and forbid leading dot or any slashes. */
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45 | for (n=0; n<LOCALE_NAME_MAX && val[n] && val[n]!='/'; n++);
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46 | if (val[0]=='.' || val[n]) val = "C.UTF-8";
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47 | int builtin = (val[0]=='C' && !val[1])
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48 | || !strcmp(val, "C.UTF-8")
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49 | || !strcmp(val, "POSIX");
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50 |
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51 | if (builtin) {
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52 | if (cat == LC_CTYPE && val[1]=='.')
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53 | return (void *)&__c_dot_utf8;
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54 | return 0;
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55 | }
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56 |
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57 | for (p=loc_head; p; p=p->next)
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58 | if (!strcmp(val, p->name)) return p;
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59 |
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60 | LOCK(lock);
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61 |
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62 | for (p=loc_head; p; p=p->next)
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63 | if (!strcmp(val, p->name)) {
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64 | UNLOCK(lock);
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65 | return p;
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66 | }
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67 |
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68 | if (!libc.secure) path = getenv("MUSL_LOCPATH");
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69 | /* FIXME: add a default path? */
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70 |
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71 | if (path) for (; *path; path=z+!!*z) {
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72 | z = __strchrnul(path, ':');
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73 | l = z - path - !!*z;
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74 | if (l >= sizeof buf - n - 2) continue;
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75 | memcpy(buf, path, l);
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76 | buf[l] = '/';
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77 | memcpy(buf+l+1, val, n);
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78 | buf[l+1+n] = 0;
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79 | size_t map_size;
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80 | const void *map = __map_file(buf, &map_size);
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81 | if (map) {
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82 | new = malloc(sizeof *new);
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83 | if (!new) {
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84 | __munmap((void *)map, map_size);
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85 | break;
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86 | }
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87 | new->map = map;
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88 | new->map_size = map_size;
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89 | memcpy(new->name, val, n);
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90 | new->name[n] = 0;
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91 | new->next = loc_head;
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92 | loc_head = new;
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93 | break;
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94 | }
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95 | }
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96 |
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97 | /* If no locale definition was found, make a locale map
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98 | * object anyway to store the name, which is kept for the
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99 | * sake of being able to do message translations at the
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100 | * application level. */
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101 | if (!new && (new = malloc(sizeof *new))) {
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102 | new->map = __c_dot_utf8.map;
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103 | new->map_size = __c_dot_utf8.map_size;
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104 | memcpy(new->name, val, n);
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105 | new->name[n] = 0;
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106 | new->next = loc_head;
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107 | loc_head = new;
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108 | }
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109 |
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110 | /* For LC_CTYPE, never return a null pointer unless the
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111 | * requested name was "C" or "POSIX". */
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112 | if (!new && cat == LC_CTYPE) new = (void *)&__c_dot_utf8;
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113 |
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114 | UNLOCK(lock);
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115 | return new;
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116 | }
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