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38 lines
907 B
C++
38 lines
907 B
C++
#include "athena/MCFile.hpp"
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namespace athena {
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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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// TODO: Rewrite this to be more optimized, the current solution takes quite a few cycles
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uint8_t* reverse(uint8_t* data, uint32_t length) {
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uint32_t a = 0;
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uint32_t swap;
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for (; a < --length; a++) {
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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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uint8_t* MCFile::unscramble(uint8_t* data, uint64_t length) {
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if (!data)
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return nullptr;
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for (uint32_t i = 0; i < length; i += 8) {
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uint32_t block1 = *(uint32_t*)reverse((data + i), 4);
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uint32_t block2 = *(uint32_t*)reverse((data + i + 4), 4);
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*(uint32_t*)(data + i) = block2;
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*(uint32_t*)(data + i + 4) = block1;
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}
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return data;
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}
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} // namespace athena
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