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/* $OpenBSD: xmalloc.c,v 1.14 2019/06/28 05:44:09 deraadt Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
* Versions of malloc and friends that check their results, and never return
* failure (they call fatal if they encounter an error).
*
* As far as I am concerned, the code I have written for this software
* can be used freely for any purpose. Any derived versions of this
* software must be clearly marked as such, and if the derived work is
* incompatible with the protocol description in the RFC file, it must be
* called by a name other than "ssh" or "Secure Shell".
*/
#include <errno.h>
#include <limits.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "log.h"
#include "xmalloc.h"
void *
xmalloc(size_t size)
{
void *ptr;
if (size == 0)
fatal("xmalloc: zero size");
ptr = malloc(size);
if (ptr == NULL)
fatal("xmalloc: allocating %zu bytes: %s",
size, strerror(errno));
return ptr;
}
void *
xcalloc(size_t nmemb, size_t size)
{
void *ptr;
if (size == 0 || nmemb == 0)
fatal("xcalloc: zero size");
ptr = calloc(nmemb, size);
if (ptr == NULL)
fatal("xcalloc: allocating %zu * %zu bytes: %s",
nmemb, size, strerror(errno));
return ptr;
}
void *
xreallocarray(void *ptr, size_t nmemb, size_t size)
{
void *new_ptr;
if (nmemb == 0 || size == 0)
fatal("xreallocarray: zero size");
new_ptr = reallocarray(ptr, nmemb, size);
if (new_ptr == NULL)
fatal("xreallocarray: allocating %zu * %zu bytes: %s",
nmemb, size, strerror(errno));
return new_ptr;
}
char *
xstrdup(const char *str)
{
char *cp;
if ((cp = strdup(str)) == NULL)
fatal("xstrdup: %s", strerror(errno));
return cp;
}
int
xasprintf(char **ret, const char *fmt, ...)
{
va_list ap;
int i;
va_start(ap, fmt);
i = vasprintf(ret, fmt, ap);
va_end(ap);
if (i == -1)
fatal("xasprintf: %s", strerror(errno));
return i;
}
int
xsnprintf(char *str, size_t len, const char *fmt, ...)
{
va_list ap;
int i;
if (len > INT_MAX)
fatal("xsnprintf: len > INT_MAX");
va_start(ap, fmt);
i = vsnprintf(str, len, fmt, ap);
va_end(ap);
if (i < 0 || i >= (int)len)
fatal("xsnprintf: overflow");
return i;
}
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