nsz Git - musl/blob - src/locale/__setlocalecat.c

   1 #include <locale.h>
   2 #include <string.h>
   3 #include "locale_impl.h"
   4 #include "libc.h"
   5 #include "atomic.h"
   6
   7 static const char envvars[][12] = {
   8         "LC_CTYPE",
   9         "LC_NUMERIC",
  10         "LC_TIME",
  11         "LC_COLLATE",
  12         "LC_MONETARY",
  13         "LC_MESSAGES",
  14 };
  15
  16 int __setlocalecat(locale_t loc, int cat, const char *val)
  17 {
  18         if (!*val) {
  19                 (val = getenv("LC_ALL")) ||
  20                 (val = getenv(envvars[cat])) ||
  21                 (val = getenv("LANG")) ||
  22                 (val = "C.UTF-8");
  23         }
  24
  25         size_t n = strnlen(val, LOCALE_NAME_MAX);
  26         int builtin = (val[0]=='C' && !val[1])
  27                 || !strcmp(val, "C.UTF-8")
  28                 || !strcmp(val, "POSIX");
  29
  30         switch (cat) {
  31         case LC_CTYPE:
  32                 a_store(&loc->ctype_utf8, !builtin || val[1]=='.');
  33                 break;
  34         case LC_MESSAGES:
  35                 if (builtin) {
  36                         loc->messages_name[0] = 0;
  37                 } else {
  38                         memcpy(loc->messages_name, val, n);
  39                         loc->messages_name[n] = 0;
  40                 }
  41                 /* fall through */
  42         default:
  43                 break;
  44         }
  45         return 0;
  46 }