130 lines
2.7 KiB
C
130 lines
2.7 KiB
C
/*
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* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2015-2017 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include "error_prints.h"
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#include "xmalloc.h"
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static void
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die_out_of_memory(void)
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{
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static int recursed;
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if (recursed)
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exit(1);
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recursed = 1;
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error_msg_and_die("Out of memory");
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}
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void *
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xmalloc(size_t size)
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{
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void *p = malloc(size);
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if (!p)
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die_out_of_memory();
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return p;
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}
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void *
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xcalloc(size_t nmemb, size_t size)
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{
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void *p = calloc(nmemb, size);
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if (!p)
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die_out_of_memory();
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return p;
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}
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#define HALF_SIZE_T (((size_t) 1) << (sizeof(size_t) * 4))
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void *
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xreallocarray(void *ptr, size_t nmemb, size_t size)
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{
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size_t bytes = nmemb * size;
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if ((nmemb | size) >= HALF_SIZE_T &&
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size && bytes / size != nmemb)
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die_out_of_memory();
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void *p = realloc(ptr, bytes);
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if (!p)
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die_out_of_memory();
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return p;
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}
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char *
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xstrdup(const char *str)
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{
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if (!str)
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return NULL;
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char *p = strdup(str);
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if (!p)
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die_out_of_memory();
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return p;
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}
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char *
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xstrndup(const char *str, size_t n)
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{
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char *p;
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if (!str)
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return NULL;
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#ifdef HAVE_STRNDUP
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p = strndup(str, n);
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#else
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p = xmalloc(n + 1);
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#endif
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if (!p)
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die_out_of_memory();
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#ifndef HAVE_STRNDUP
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strncpy(p, str, n);
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p[n] = '\0';
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#endif
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return p;
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}
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