e593584a47
- Screen brightness is now updated as soon as the user selects a brightness option, on all boot environments - Payloads can now be 1KB bigger - Some cache-related bugs may have been fixed
68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
/*
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* memory.c
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*
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* Quick Search algorithm adapted from http://igm.univ-mlv.fr/~lecroq/string/node19.html#SECTION00190
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*/
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#include "memory.h"
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void memcpy(void *dest, const void *src, u32 size)
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{
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u8 *destc = (u8 *)dest;
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const u8 *srcc = (const u8 *)src;
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for(u32 i = 0; i < size; i++)
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destc[i] = srcc[i];
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}
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void memset32(void *dest, u32 filler, u32 size)
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{
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u32 *dest32 = (u32 *)dest;
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for (u32 i = 0; i < size / 4; i++)
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dest32[i] = filler;
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}
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int memcmp(const void *buf1, const void *buf2, u32 size)
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{
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const u8 *buf1c = (const u8 *)buf1;
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const u8 *buf2c = (const u8 *)buf2;
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for(u32 i = 0; i < size; i++)
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{
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int cmp = buf1c[i] - buf2c[i];
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if(cmp) return cmp;
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}
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return 0;
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}
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u8 *memsearch(u8 *startPos, const void *pattern, u32 size, u32 patternSize)
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{
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const u8 *patternc = (const u8 *)pattern;
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//Preprocessing
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u32 table[256];
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for(u32 i = 0; i < 256; ++i)
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table[i] = patternSize + 1;
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for(u32 i = 0; i < patternSize; ++i)
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table[patternc[i]] = patternSize - i;
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//Searching
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u32 j = 0;
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while(j <= size - patternSize)
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{
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if(memcmp(patternc, startPos + j, patternSize) == 0)
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return startPos + j;
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j += table[startPos[j + patternSize]];
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}
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return NULL;
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}
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void cleanInvalidateDCacheAndDMB(void)
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{
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((void (*)())0xFFFF0830)(); //Why write our own code when it's well implemented in the unprotected bootROM?
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} |