1#include <stdlib.h> 2#include <string.h> 3#include "locale_impl.h" 4#include "libc.h" 5 6int __loc_is_allocated(locale_t loc) 7{ 8 return loc && loc != C_LOCALE && loc != UTF8_LOCALE; 9} 10 11locale_t __newlocale(int mask, const char *name, locale_t loc) 12{ 13 int i, j; 14 struct __locale_struct tmp; 15 const struct __locale_map *lm; 16 17 /* For locales with allocated storage, modify in-place. */ 18 if (__loc_is_allocated(loc)) { 19 for (i=0; i<LC_ALL; i++) 20 if (mask & (1<<i)) 21 loc->cat[i] = __get_locale(i, name); 22 return loc; 23 } 24 25 /* Otherwise, build a temporary locale object, which will only 26 * be instantiated in allocated storage if it does not match 27 * one of the built-in static locales. This makes the common 28 * usage case for newlocale, getting a C locale with predictable 29 * behavior, very fast, and more importantly, fail-safe. */ 30 for (j=i=0; i<LC_ALL; i++) { 31 if (loc && !(mask & (1<<i))) 32 lm = loc->cat[i]; 33 else 34 lm = __get_locale(i, mask & (1<<i) ? name : ""); 35 if (lm) j++; 36 tmp.cat[i] = lm; 37 } 38 39 if (!j) 40 return C_LOCALE; 41 if (j==1 && tmp.cat[LC_CTYPE]==&__c_dot_utf8) 42 return UTF8_LOCALE; 43 44 if ((loc = malloc(sizeof *loc))) *loc = tmp; 45 46 return loc; 47} 48 49weak_alias(__newlocale, newlocale); 50