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thodg/got/lib/xmalloc.c

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  • Author : Stefan Sperling
    Date : 2017-11-29 17:09:52
    Hash : 574ed2c3
    Message : add some unmodified files from /usr/src/usr.bin/diff/

  • lib/xmalloc.c
  • /* $OpenBSD: xmalloc.c,v 1.9 2015/11/17 18:25:02 tobias 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 <err.h>
    #include <stdarg.h>
    #include <stdint.h>
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    
    #include "xmalloc.h"
    
    void *
    xmalloc(size_t size)
    {
    	void *ptr;
    
    	if (size == 0)
    		errx(2, "xmalloc: zero size");
    	ptr = malloc(size);
    	if (ptr == NULL)
    		err(2, "xmalloc: allocating %zu bytes", size);
    	return ptr;
    }
    
    void *
    xcalloc(size_t nmemb, size_t size)
    {
    	void *ptr;
    
    	ptr = calloc(nmemb, size);
    	if (ptr == NULL)
    		err(2, "xcalloc: allocating %zu * %zu bytes", nmemb, size);
    	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)
    		err(2, "xreallocarray: allocating %zu * %zu bytes",
    		    nmemb, size);
    	return new_ptr;
    }
    
    char *
    xstrdup(const char *str)
    {
    	char *cp;
    
    	if ((cp = strdup(str)) == NULL)
    		err(2, "xstrdup");
    	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)
    		err(2, "xasprintf");
    
    	return i;
    }