forked from Public-Mirror/Textractor
83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
// ithsys.cc
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// 8/21/2013 jichi
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// Branch: ITH_SYS/SYS.cpp, rev 126
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//
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// 8/24/2013 TODO:
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// - Clean up the code
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// - Move my old create remote thread for ITH2 here
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#include "ithsys/ithsys.h"
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// - Global variables -
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// jichi 6/12/2015: https://en.wikipedia.org/wiki/Shift_JIS
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// Leading table for SHIFT-JIS encoding
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BYTE LeadByteTable[0x100] = {
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
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2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
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2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
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2,2,2,2,2,2,2,2,2,2,2,2,2,1,1,1
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};
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// - API functions -
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extern "C" {
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/**
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* Return the address of the first matched pattern.
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* Artikash 7/14/2018: changed implementation, hopefully it behaves the same
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* Return 0 if failed. The return result is ambiguous if the pattern address is 0.
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*
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* @param startAddress search start address
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* @param range search range
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* @param pattern array of bytes to match
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* @param patternSize size of the pattern array
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* @return relative offset from the startAddress
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*/
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DWORD SearchPattern(DWORD base, DWORD base_length, LPCVOID search, DWORD search_length)
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{
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// Artikash 7/14/2018: not sure, but I think this could throw read access violation if I dont subtract search_length
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for (int i = 0; i < base_length - search_length; ++i)
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for (int j = 0; j <= search_length; ++j)
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if (j == search_length) return i; // not sure about this algorithm...
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else if (*((BYTE*)base + i + j) != *((BYTE*)search + j) && *((BYTE*)search + j) != 0x11) break; // 0x11 = wildcard
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//if (memcmp((void*)(base + i), search, search_length) == 0)
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//return i;
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return 0;
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}
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DWORD IthGetMemoryRange(LPCVOID mem, DWORD *base, DWORD *size)
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{
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MEMORY_BASIC_INFORMATION info = {};
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VirtualQuery(mem, &info, sizeof(info));
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if (base)
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*base = (DWORD)info.BaseAddress;
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if (size)
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*size = info.RegionSize;
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return info.Protect > PAGE_NOACCESS;
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}
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inline DWORD GetHash(LPSTR str)
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{
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DWORD hash = 0;
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//for (; *str; str++)
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while (*str)
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hash = ((hash >> 7) | (hash << 25)) + *str++;
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return hash;
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}
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} // extern "C"
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// EOF
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