mirror of https://github.com/bsnes-emu/bsnes.git
89 lines
3.4 KiB
C++
Executable File
89 lines
3.4 KiB
C++
Executable File
#include <fc/fc.hpp>
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namespace Famicom {
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Cheat cheat;
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bool Cheat::decode(const string &code_, unsigned &addr, unsigned &data, unsigned &comp) {
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static bool initialize = false;
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static uint8 mapProActionReplay[256], mapGameGenie[256];
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if(initialize == false) {
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initialize = true;
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for(auto &n : mapProActionReplay) n = ~0;
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mapProActionReplay['0'] = 0; mapProActionReplay['1'] = 1; mapProActionReplay['2'] = 2; mapProActionReplay['3'] = 3;
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mapProActionReplay['4'] = 4; mapProActionReplay['5'] = 5; mapProActionReplay['6'] = 6; mapProActionReplay['7'] = 7;
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mapProActionReplay['8'] = 8; mapProActionReplay['9'] = 9; mapProActionReplay['A'] = 10; mapProActionReplay['B'] = 11;
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mapProActionReplay['C'] = 12; mapProActionReplay['D'] = 13; mapProActionReplay['E'] = 14; mapProActionReplay['F'] = 15;
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for(auto &n : mapGameGenie) n = ~0;
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mapGameGenie['A'] = 0; mapGameGenie['P'] = 1; mapGameGenie['Z'] = 2; mapGameGenie['L'] = 3;
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mapGameGenie['G'] = 4; mapGameGenie['I'] = 5; mapGameGenie['T'] = 6; mapGameGenie['Y'] = 7;
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mapGameGenie['E'] = 8; mapGameGenie['O'] = 9; mapGameGenie['X'] = 10; mapGameGenie['U'] = 11;
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mapGameGenie['K'] = 12; mapGameGenie['S'] = 13; mapGameGenie['V'] = 14; mapGameGenie['N'] = 15;
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}
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string code = code_;
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code.upper();
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unsigned length = code.length(), bits = 0;
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if(code.wildcard("????:??")) {
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code = { substr(code, 0, 4), substr(code, 5, 2) };
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for(unsigned n = 0; n < 6; n++) if(mapProActionReplay[code[n]] > 15) return false;
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bits = hex(code);
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addr = (bits >> 8) & 0xffff;
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data = (bits >> 0) & 0xff;
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comp = ~0;
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return true;
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}
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if(code.wildcard("????:??:??")) {
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code = { substr(code, 0, 4), substr(code, 5, 2), substr(code, 8, 2) };
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for(unsigned n = 0; n < 8; n++) if(mapProActionReplay[code[n]] > 15) return false;
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bits = hex(code);
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addr = (bits >> 16) & 0xffff;
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data = (bits >> 8) & 0xff;
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comp = (bits >> 0) & 0xff;
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return true;
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}
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if(length == 6) {
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for(unsigned n = 0; n < 6; n++) if(mapGameGenie[code[n]] > 15) return false;
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for(unsigned n = 0; n < 6; n++) bits |= mapGameGenie[code[n]] << (20 - n * 4);
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unsigned addrTable[] = { 10, 9, 8, 7, 2, 1, 0, 19, 14, 13, 12, 11, 6, 5, 4 };
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unsigned dataTable[] = { 23, 18, 17, 16, 3, 22, 21, 20 };
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addr = 0x8000, data = 0x00, comp = ~0;
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for(unsigned n = 0; n < 15; n++) addr |= bits & (1 << addrTable[n]) ? 0x4000 >> n : 0;
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for(unsigned n = 0; n < 8; n++) data |= bits & (1 << dataTable[n]) ? 0x80 >> n : 0;
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return true;
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}
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if(length == 8) {
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for(unsigned n = 0; n < 8; n++) if(mapGameGenie[code[n]] > 15) return false;
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for(unsigned n = 0; n < 8; n++) bits |= mapGameGenie[code[n]] << (28 - n * 4);
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unsigned addrTable[] = { 18, 17, 16, 15, 10, 9, 8, 27, 22, 21, 20, 19, 14, 13, 12 };
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unsigned dataTable[] = { 31, 26, 25, 24, 3, 30, 29, 28 };
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unsigned compTable[] = { 7, 2, 1, 0, 11, 6, 5,4 };
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addr = 0x8000, data = 0x00, comp = 0x00;
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for(unsigned n = 0; n < 15; n++) addr |= bits & (1 << addrTable[n]) ? 0x4000 >> n : 0;
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for(unsigned n = 0; n < 8; n++) data |= bits & (1 << dataTable[n]) ? 0x80 >> n : 0;
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for(unsigned n = 0; n < 8; n++) comp |= bits & (1 << compTable[n]) ? 0x80 >> n : 0;
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return true;
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}
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return false;
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}
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void Cheat::synchronize() {
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for(auto &n : override) n = false;
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for(unsigned n = 0; n < size(); n++) {
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override[operator[](n).addr] = true;
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}
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}
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}
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