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Switches to more straightforward handler for .z80-style compression.

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This commit is contained in:
Thomas Harte 2021-04-25 18:07:36 -04:00
parent 8d86aa69bc
commit c34cb310a8
1 changed files with 19 additions and 15 deletions
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34
Storage/State/Z80.cpp
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@ -25,24 +25,28 @@ std::vector<uint8_t> read_memory(Storage::FileHolder &file, size_t size, bool is
std::vector<uint8_t> result(size);
size_t cursor = 0;
uint8_t incoming[2] = { file.get8(), file.get8() };
while(true) {
if(incoming[0] == 0xed && incoming[1] == 0xed) {
const uint8_t count = file.get8();
const uint8_t value = file.get8();
while(cursor != size) {
const uint8_t next = file.get8();
memset(&result[cursor], value, count);
cursor += count;
if(cursor == size) break;
incoming[0] = file.get8();
incoming[1] = file.get8();
} else {
result[cursor] = incoming[0];
if(next != 0xed) {
result[cursor] = next;
++cursor;
if(cursor == size) break;
incoming[0] = incoming[1];
incoming[1] = file.get8();
continue;
}
const uint8_t after = file.get8();
if(after != 0xed) {
result[cursor] = next;
++cursor;
file.seek(-1, SEEK_CUR);
continue;
}
const uint8_t count = file.get8();
const uint8_t value = file.get8();
memset(&result[cursor], value, count);
cursor += count;
}
return result;