67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/*
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* Copyright (c) 2015, 2022 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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* util.h
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* Utility functions.
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*/
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#ifndef UTIL_H
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#define UTIL_H
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#include <string.h>
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#include <stdlib.h>
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#define MALLOC_TYPE(type) (type*) malloc(sizeof(type))
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#define CALLOC_TYPE(type) (type*) calloc(1, sizeof(type))
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__attribute__((unused))
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static bool memiszero(const void* mem, size_t size)
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{
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const unsigned char* buf = (const unsigned char*) mem;
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for ( size_t i = 0; i < size; i++ )
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if ( buf[i] )
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return false;
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return true;
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}
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__attribute__((unused))
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static bool array_add(void*** array_ptr,
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size_t* used_ptr,
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size_t* length_ptr,
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void* value)
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{
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void** array;
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memcpy(&array, array_ptr, sizeof(array)); // Strict aliasing.
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if ( *used_ptr == *length_ptr )
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{
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size_t length = *length_ptr;
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if ( !length )
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length = 4;
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void** new_array = reallocarray(array, length, 2 * sizeof(void*));
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if ( !new_array )
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return false;
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array = new_array;
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memcpy(array_ptr, &array, sizeof(array)); // Strict aliasing.
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*length_ptr = length * 2;
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}
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memcpy(array + (*used_ptr)++, &value, sizeof(value)); // Strict aliasing.
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return true;
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}
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#endif
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