7ba0d89c9f
Accept NULL argument in xstrdup and xtrndup functions to allow use of "xstrdup(str)" instead of "str ? xstrdup(str) : NULL". * xmalloc.c (xstrdup, xstrndup): Handle NULL argument. * xmalloc.h: Add comment regarding this deviation from the behaviour of the POSIX counterparts of these functions.
55 lines
2.5 KiB
C
55 lines
2.5 KiB
C
/*
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* This file contains wrapper functions working with memory allocations,
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* they just terminate the program in case of memory allocation failure.
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* These functions can be used by various binaries included in the strace
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* package.
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*
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* Copyright (c) 2001-2017 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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#ifndef STRACE_XMALLOC_H
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#define STRACE_XMALLOC_H
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#include <stddef.h>
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#include "gcc_compat.h"
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void *xcalloc(size_t nmemb, size_t size)
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ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE((1, 2));
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void *xmalloc(size_t size) ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE((1));
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void *xreallocarray(void *ptr, size_t nmemb, size_t size)
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ATTRIBUTE_ALLOC_SIZE((2, 3));
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/*
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* Note that the following two functions return NULL when NULL is specified
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* and not when allocation is failed, since, as the "x" prefix implies,
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* the allocation failure leads to program termination, so we may re-purpose
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* this return value and simplify the idiom "str ? xstrdup(str) : NULL".
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*/
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char *xstrdup(const char *str) ATTRIBUTE_MALLOC;
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char *xstrndup(const char *str, size_t n) ATTRIBUTE_MALLOC;
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#endif /* !STRACE_XMALLOC_H */
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