ref: 6b341367541d0a5a221fcb8cba6d6ff0a2d48e16
dir: /lib/c/setlocale.c/
#include <locale.h> #include <stddef.h> #undef setlocale char * setlocale(int category, const char *locale) { if (category > LC_TIME || category < LC_ALL) return NULL; if (!locale || locale[0] == '\0' || locale[0] == 'C' && locale[1] == '\0') { return "C"; } return NULL; }