/* $OpenBSD: xmalloc.c,v 1.38 2025/05/23 00:40:45 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 "includes.h"

#include <stdarg.h>

#include <stdint.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "xmalloc.h"

#include "log.h"

#if defined(__OpenBSD__)

const char * const malloc_options = "S";

#endif /* __OpenBSD__ */

void *

xmalloc(size_t size)

{

  void *ptr;

  if (size == 0)

    fatal("xmalloc: zero size");

  ptr = malloc(size);

  if (ptr == NULL)

    fatal("xmalloc: out of memory (allocating %zu bytes)", size);

  return ptr;

}

void *

xcalloc(size_t nmemb, size_t size)

{

  void *ptr;

  if (size == 0 || nmemb == 0)

    fatal("xcalloc: zero size");

  if (SIZE_MAX / nmemb < size)

    fatal("xcalloc: nmemb * size > SIZE_MAX");

  ptr = calloc(nmemb, size);

  if (ptr == NULL)

    fatal("xcalloc: out of memory (allocating %zu bytes)",

        size * nmemb);

  return ptr;

}

void *

xreallocarray(void *ptr, size_t nmemb, size_t size)

{

  void *new_ptr;

  new_ptr = reallocarray(ptr, nmemb, size);

  if (new_ptr == NULL)

    fatal("xreallocarray: out of memory (%zu elements of %zu bytes)",

        nmemb, size);

  return new_ptr;

}

void *

xrecallocarray(void *ptr, size_t onmemb, size_t nmemb, size_t size)

{

  void *new_ptr;

  new_ptr = recallocarray(ptr, onmemb, nmemb, size);

  if (new_ptr == NULL)

    fatal("xrecallocarray: out of memory (%zu elements of %zu bytes)",

        nmemb, size);

  return new_ptr;

}

char *

xstrdup(const char *str)

{

  size_t len;

  char *cp;

  len = strlen(str) + 1;

  cp = xmalloc(len);

  return memcpy(cp, str, len);

}

int

xvasprintf(char **ret, const char *fmt, va_list ap)

{

  int i;

  i = vasprintf(ret, fmt, ap);

  if (i < 0 || *ret == NULL)

    fatal("xvasprintf: could not allocate memory");

  return i;

}

int

xasprintf(char **ret, const char *fmt, ...)

{

  va_list ap;

  int i;

  va_start(ap, fmt);

  i = xvasprintf(ret, fmt, ap);

  va_end(ap);

  return i;

}