66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/*
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* Copyright (c) 2016 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* compat.c
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* Compatibility.
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*/
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#include <errno.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include "config.h"
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#include "compat.h"
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#ifndef HAVE_EXPLICIT_BZERO
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void explicit_bzero(void* buffer, size_t size)
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{
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memset(buffer, 0, size);
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}
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#endif
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#ifndef HAVE_REALLOCARRAY
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void* reallocarray(void* ptr, size_t nmemb, size_t size)
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{
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if ( size && nmemb && SIZE_MAX / size < nmemb )
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return errno = ENOMEM, (void*) NULL;
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return realloc(ptr, nmemb * size);
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}
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#endif
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#ifndef HAVE_STRLCAT
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size_t strlcat(char* restrict dest, const char* restrict src, size_t size)
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{
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size_t dest_len = strnlen(dest, size);
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if ( size <= dest_len )
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return dest_len + strlen(src);
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return dest_len + strlcpy(dest + dest_len, src, size - dest_len);
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}
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#endif
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#ifndef HAVE_STRLCPY
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size_t strlcpy(char* restrict dest, const char* restrict src, size_t size)
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{
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if ( !size )
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return strlen(src);
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size_t result;
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for ( result = 0; result < size-1 && src[result]; result++ )
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dest[result] = src[result];
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dest[result] = '\0';
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return result + strlen(src + result);
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}
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#endif
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