IABSD.fr/src/usr.bin/ssh/xmalloc.c

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• Author : djm
  Date : 2019-11-12 22:32:48
  Hash : 635e2a62
  Message : add xvasprintf()

• usr.bin/ssh/xmalloc.c

• /* $OpenBSD: xmalloc.c,v 1.36 2019/11/12 22:32:48 djm 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 <stdarg.h>
  #include <stdint.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include "xmalloc.h"
  #include "log.h"
  
  char *malloc_options = "S";
  
  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);
  	strlcpy(cp, str, len);
  	return cp;
  }
  
  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;
  }