1#include <locale.h> 2#include <string.h> 3#include "locale_impl.h" 4#include "libc.h" 5#include "atomic.h" 6 7const char *__lctrans_impl(const char *msg, const struct __locale_map *lm) 8{ 9 const char *trans = 0; 10 if (lm) trans = __mo_lookup(lm->map, lm->map_size, msg); 11 return trans ? trans : msg; 12} 13 14const unsigned char *__map_file(const char *, size_t *); 15int __munmap(void *, size_t); 16char *__strchrnul(const char *, int); 17 18static const char envvars[][12] = { 19 "LC_CTYPE", 20 "LC_NUMERIC", 21 "LC_TIME", 22 "LC_COLLATE", 23 "LC_MONETARY", 24 "LC_MESSAGES", 25}; 26 27const struct __locale_map *__get_locale(int cat, const char *val) 28{ 29 static int lock[2]; 30 static void *volatile loc_head; 31 const struct __locale_map *p; 32 struct __locale_map *new = 0; 33 const char *path = 0, *z; 34 char buf[256]; 35 size_t l, n; 36 37 if (!*val) { 38 (val = getenv("LC_ALL")) && *val || 39 (val = getenv(envvars[cat])) && *val || 40 (val = getenv("LANG")) && *val || 41 (val = "C.UTF-8"); 42 } 43 44 /* Limit name length and forbid leading dot or any slashes. */ 45 for (n=0; n<LOCALE_NAME_MAX && val[n] && val[n]!='/'; n++); 46 if (val[0]=='.' || val[n]) val = "C.UTF-8"; 47 int builtin = (val[0]=='C' && !val[1]) 48 || !strcmp(val, "C.UTF-8") 49 || !strcmp(val, "POSIX"); 50 51 if (builtin) { 52 if (cat == LC_CTYPE && val[1]=='.') 53 return (void *)&__c_dot_utf8; 54 return 0; 55 } 56 57 for (p=loc_head; p; p=p->next) 58 if (!strcmp(val, p->name)) return p; 59 60 LOCK(lock); 61 62 for (p=loc_head; p; p=p->next) 63 if (!strcmp(val, p->name)) { 64 UNLOCK(lock); 65 return p; 66 } 67 68 if (!libc.secure) path = getenv("MUSL_LOCPATH"); 69 /* FIXME: add a default path? */ 70 71 if (path) for (; *path; path=z+!!*z) { 72 z = __strchrnul(path, ':'); 73 l = z - path - !!*z; 74 if (l >= sizeof buf - n - 2) continue; 75 memcpy(buf, path, l); 76 buf[l] = '/'; 77 memcpy(buf+l+1, val, n); 78 buf[l+1+n] = 0; 79 size_t map_size; 80 const void *map = __map_file(buf, &map_size); 81 if (map) { 82 new = malloc(sizeof *new); 83 if (!new) { 84 __munmap((void *)map, map_size); 85 break; 86 } 87 new->map = map; 88 new->map_size = map_size; 89 memcpy(new->name, val, n); 90 new->name[n] = 0; 91 new->next = loc_head; 92 loc_head = new; 93 break; 94 } 95 } 96 97 /* If no locale definition was found, make a locale map 98 * object anyway to store the name, which is kept for the 99 * sake of being able to do message translations at the 100 * application level. */ 101 if (!new && (new = malloc(sizeof *new))) { 102 new->map = __c_dot_utf8.map; 103 new->map_size = __c_dot_utf8.map_size; 104 memcpy(new->name, val, n); 105 new->name[n] = 0; 106 new->next = loc_head; 107 loc_head = new; 108 } 109 110 /* For LC_CTYPE, never return a null pointer unless the 111 * requested name was "C" or "POSIX". */ 112 if (!new && cat == LC_CTYPE) new = (void *)&__c_dot_utf8; 113 114 UNLOCK(lock); 115 return new; 116} 117