mirror of https://github.com/libAthena/athena.git
60 lines
1.6 KiB
C++
60 lines
1.6 KiB
C++
// This file is part of libAthena.
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//
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// libAthena 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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// libAthena 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 libAthena. If not, see <http://www.gnu.org/licenses/>
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#include "Athena/MCFile.hpp"
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namespace Athena
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{
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const char MCFile::VERSION_EU_JP[33] = "AGBZELDA:THE MINISH CAP:ZELDA 3\0";
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const char MCFile::VERSION_US[33] = "AGBZELDA:THE MINISH CAP:ZELDA 5\0";
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MCFile::MCFile()
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{
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}
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// TODO: Rewrite this to be more optimized, the current solution takes quite a few cycles
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atUint8* reverse(atUint8* data, atUint32 length)
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{
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atUint32 a = 0;
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atUint32 swap;
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for (;a<--length; a++)
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{
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swap = data[a];
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data[a] = data[length];
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data[length] = swap;
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}
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return data;
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}
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atUint8* MCFile::unscramble(atUint8* data, atUint64 length)
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{
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if (!data)
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return nullptr;
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for (atUint32 i = 0; i < length; i += 8)
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{
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atUint32 block1 = *(atUint32*)reverse((data + i), 4);
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atUint32 block2 = *(atUint32*)reverse((data + i + 4), 4);
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*(atUint32*)(data + i) = block2;
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*(atUint32*)(data + i + 4) = block1;
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}
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return data;
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}
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} // zelda
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