mirror of
https://github.com/jmarshall23/CnC_Remastered_Collection.git
synced 2026-08-12 08:00:55 +02:00
Justin Marshall
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
/*
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libsmacker - A C library for decoding .smk Smacker Video files
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Copyright (C) 2012-2013 Greg Kennedy
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See smacker.h for more information.
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smk_malloc.h
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"Safe" implementations of malloc and free.
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*/
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#ifndef SMK_MALLOC_H
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#define SMK_MALLOC_H
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#include <stdlib.h>
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#include <stdio.h>
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/* for memset */
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#include <string.h>
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/* "safe" null check:
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branches to an error block if pointer is null */
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#define smk_null_check(p) \
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{ \
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if (!p) \
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{ \
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fprintf(stderr,"libsmacker::smk_null_check(" #p "): ERROR: NULL POINTER at line %lu, file %s\n", (unsigned long)__LINE__, __FILE__); \
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goto error; \
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} \
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}
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/*
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Safe free: attempts to prevent double-free by setting pointer to NULL.
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Warns on attempts to free a NULL pointer.
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*/
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#define smk_free(p) \
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{ \
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if (p) \
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{ \
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free(p); \
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p = NULL; \
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} \
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/* else \
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{ \
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fprintf(stderr,"libsmacker::smk_free(" #p ") - Warning: attempt to free NULL pointer (file: %s, line: %lu)\n", __FILE__, (unsigned long)__LINE__); \
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} */ \
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}
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/*
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Safe malloc: exits if malloc() returns NULL.
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Ideally, one should not exit() in a library. However, if you cannot
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malloc(), you probably have bigger problems.
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*/
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#define smk_malloc(p,x) \
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{ \
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if (p) \
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{ \
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fprintf(stderr,"libsmacker::smk_malloc(" #p ",%lu) - Warning: freeing non-NULL pointer before malloc (file: %s, line: %lu)\n", (unsigned long) x, __FILE__, (unsigned long)__LINE__); \
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smk_free(p); \
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} \
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p = malloc(x); \
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if (!p) \
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{ \
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fprintf(stderr,"libsmacker::smk_malloc(" #p ",%lu) - ERROR: malloc() returned NULL (file: %s, line: %lu)\n", (unsigned long) x, __FILE__, (unsigned long)__LINE__); \
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exit(EXIT_FAILURE); \
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} \
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memset(p,0,x); \
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}
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#endif
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