/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <errno.h>
#include <sys/time.h>
#include <time.h>

/* Needed by Musl internals. Normally provided by Musl's __tz.c file. */
const char __utc[] = "UTC";

/*
 * strftime ends up depending on time zone data files. Stub this function rather
 * than stubbing out data loading.
 */
size_t strftime_l(char* restrict s,
                  size_t n,
                  const char* restrict f,
                  const struct tm* restrict tm,
                  locale_t loc) {
    if (n) {
        s[0] = 0;
    }
    return 0;
}

size_t strftime(char* restrict s,
                size_t n,
                const char* restrict f,
                const struct tm* restrict tm) {
    return strftime_l(s, n, f, tm, 0);
}

/* Mock Musl function for timezone information - no databases available. */
void __secs_to_zone(long long t,
                    int local,
                    int* isdst,
                    long* offset,
                    long* oppoff,
                    const char** zonename) {
    /* UTC+0 */
    *isdst = 0;
    *offset = 0;
    if (oppoff)
        *oppoff = 0;
    *zonename = "UTC";
}

/* sys/time.h is not quite right for ALL_SOURCE, so declare the last argument as
 * void* */
int settimeofday(const struct timeval* tv, const void* tz) {
    return EPERM;
}