[337] | 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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[387] | 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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[337] | 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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