common.c

/*
 * cranklance/gearlance bfjoust interpreter; shared helpers.
 *
 * Copyright (c) 2011-2013 Heikki Kallasjoki
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

#include "common.h"

void die(const char *fmt, ...)
{
	va_list ap;
	va_start(ap, fmt);
	vfprintf(stderr, fmt, ap);
	va_end(ap);
	fputc('\n', stderr);

	exit(1);
}

void *smalloc(size_t size)
{
	void *ptr = malloc(size);
	if (!ptr) die("out of memory");
	return ptr;
}

void *srealloc(void *ptr, size_t size)
{
	ptr = realloc(ptr, size);
	if (!ptr) die("out of memory");
	return ptr;
}

int sopen(const char *fname)
{
	int fd = open(fname, O_RDONLY);
	if (fd == -1)
		die("open failed: %s", fname);
	return fd;
}

int screat(const char *fname)
{
	int fd = creat(fname, 0666);
	if (fd == -1)
		die("creat failed: %s", fname);
	return fd;
}