compat/time32/time32gm.c

570af302Sopenharmony_ci#define _GNU_SOURCE
570af302Sopenharmony_ci#include "time32.h"
570af302Sopenharmony_ci#include <time.h>
570af302Sopenharmony_ci#include <errno.h>
570af302Sopenharmony_ci#include <stdint.h>
570af302Sopenharmony_ci
570af302Sopenharmony_citime32_t __time32gm(struct tm *tm)
570af302Sopenharmony_ci{
570af302Sopenharmony_ci	time_t t = timegm(tm);
570af302Sopenharmony_ci	if (t < INT32_MIN || t > INT32_MAX) {
570af302Sopenharmony_ci		errno = EOVERFLOW;
570af302Sopenharmony_ci		return -1;
570af302Sopenharmony_ci	}
570af302Sopenharmony_ci	return t;
570af302Sopenharmony_ci}