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https://github.com/amadvance/snapraid.git
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67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/*
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* Copyright (C) 2011 Andrea Mazzoleni
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "portable.h"
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#include "util.h"
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void* malloc_nofail(size_t size)
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{
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void* ptr = malloc(size);
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if (!ptr) {
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fprintf(stderr, "Low memory\n");
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exit(EXIT_FAILURE);
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}
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return ptr;
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}
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void memxor(unsigned char* xor, const unsigned char* block, unsigned size)
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{
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while (size >= 16) {
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uint32_t* xor32 = (uint32_t*)xor;
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const uint32_t* block32 = (const uint32_t*)block;
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xor32[0] ^= block32[0];
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xor32[1] ^= block32[1];
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xor32[2] ^= block32[2];
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xor32[3] ^= block32[3];
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xor += 16;
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block += 16;
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size -= 16;
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}
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while (size >= 4) {
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uint32_t* xor32 = (uint32_t*)xor;
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const uint32_t* block32 = (const uint32_t*)block;
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xor32[0] ^= block32[0];
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xor += 4;
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block += 4;
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size -= 4;
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}
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while (size != 0) {
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xor[0] ^= block[0];
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xor += 1;
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block += 1;
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size -= 1;
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}
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}
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