ref: 1d36866ee5505eec6d0310522e5ba8879d44f5bd
dir: /src/libc/locale/setlocale.c/
#include <locale.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; }