/*
# This file is part of the Astrometry.net suite.
# Licensed under a 3-clause BSD style license - see LICENSE
*/
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#include <unistd.h>

#include "os-features.h"

#if defined(_POSIX_SYNCHRONIZED_IO) && (_POSIX_SYNCHRONIZED_IO > 0)
#define NEED_FDATASYNC 0
#else
#define NEED_FDATASYNC 1
#endif

#if NEED_CANONICALIZE_FILE_NAME
char* canonicalize_file_name(const char* fn) {
    char* path = malloc(1024);
    char* canon;
    canon = realpath(fn, path);
    if (!canon) {
        free(path);
        return NULL;
    }
    path = realloc(path, strlen(path) + 1);
    return path;
}
#endif

#if NEED_FDATASYNC
int fdatasync(int fd) {
    return fsync(fd);
}
#endif

#if NEED_QSORT_R
#include "qsort_reentrant.c"
#endif