#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include "xwrap.h"

#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#define RETRY_SEC     0
#define RETRY_NSEC    250000000

static const char fail_msg[] = "Fail to allocate memory. Retry ...\n";
static const size_t fail_len = STATIC_STRLEN (fail_msg);

int xatol (const char* str, long* result) {
	int errno_save, rval;
	long lres;
	char* endptr;

	errno_save = errno;
	errno = 0, rval = 0;

	lres = strtol (str, &endptr, 10);
	if (str == endptr || errno != 0) {
		rval = -1;
	} else {
		*result = lres;
	}

	errno = errno_save;

	return rval;
}

void* xmalloc (size_t size) {
	void* memptr;

	while ((memptr = malloc (size)) == NULL) {
		nanosleep (&(struct timespec) { RETRY_SEC, RETRY_NSEC }, NULL);
		write (STDERR_FILENO, fail_msg, fail_len);
	}

	return memptr;
}