+/* $OpenBSD: xmalloc.c,v 1.27 2006/08/03 03:34:42 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
*/
#include "includes.h"
-RCSID("$OpenBSD: xmalloc.c,v 1.8 2000/09/07 20:27:55 deraadt Exp $");
-#include "ssh.h"
+#include <sys/param.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "xmalloc.h"
+#include "log.h"
void *
xmalloc(size_t size)
{
- void *ptr = malloc(size);
+ void *ptr;
+
+ if (size == 0)
+ fatal("xmalloc: zero size");
+ ptr = malloc(size);
if (ptr == NULL)
- fatal("xmalloc: out of memory (allocating %d bytes)", (int) size);
+ fatal("xmalloc: out of memory (allocating %lu bytes)", (u_long) size);
return ptr;
}
void *
-xrealloc(void *ptr, size_t new_size)
+xcalloc(size_t nmemb, size_t size)
+{
+ void *ptr;
+
+ if (size == 0 || nmemb == 0)
+ fatal("xcalloc: zero size");
+ if (SIZE_T_MAX / nmemb < size)
+ fatal("xcalloc: nmemb * size > SIZE_T_MAX");
+ ptr = calloc(nmemb, size);
+ if (ptr == NULL)
+ fatal("xcalloc: out of memory (allocating %lu bytes)",
+ (u_long)(size * nmemb));
+ return ptr;
+}
+
+void *
+xrealloc(void *ptr, size_t nmemb, size_t size)
{
void *new_ptr;
+ size_t new_size = nmemb * size;
+ if (new_size == 0)
+ fatal("xrealloc: zero size");
+ if (SIZE_T_MAX / nmemb < size)
+ fatal("xrealloc: nmemb * size > SIZE_T_MAX");
if (ptr == NULL)
- fatal("xrealloc: NULL pointer given as argument");
- new_ptr = realloc(ptr, new_size);
+ new_ptr = malloc(new_size);
+ else
+ new_ptr = realloc(ptr, new_size);
if (new_ptr == NULL)
- fatal("xrealloc: out of memory (new_size %d bytes)", (int) new_size);
+ fatal("xrealloc: out of memory (new_size %lu bytes)",
+ (u_long) new_size);
return new_ptr;
}
char *
xstrdup(const char *str)
{
- int len = strlen(str) + 1;
+ size_t len;
+ char *cp;
- char *cp = xmalloc(len);
+ len = strlen(str) + 1;
+ cp = xmalloc(len);
strlcpy(cp, str, len);
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 < 0 || *ret == NULL)
+ fatal("xasprintf: could not allocate memory");
+
+ return (i);
+}