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New world format, fixes

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MihailRis 2023-11-05 15:32:46 +03:00 • committed by GitHub
parent 0c65b13f4e
commit 0cf8382e95
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GPG key ID: 4AEE18F83AFDEB23
21 changed files with 350 additions and 173 deletions
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53
src/files/files.cpp
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@ -55,56 +55,3 @@ char* read_binary_file(std::string filename, size_t& length) {
input.close();
return data.release();
}
// returns decompressed length
size_t decompressRLE(const ubyte* src, size_t length, ubyte* dst, size_t targetLength){
size_t offset = 0;
for (size_t i = 0; i < length;){
unsigned char counter = src[i++];
unsigned char c = src[i++];
for (unsigned int j = 0; j <= counter; j++){
dst[offset++] = c;
}
}
return offset;
}
size_t calcRLE(const ubyte* src, size_t length) {
size_t offset = 0;
size_t counter = 0;
ubyte c = src[0];
for (size_t i = 0; i < length; i++){
ubyte cnext = src[i];
if (cnext != c || counter == 255){
offset += 2;
c = cnext;
counter = 0;
} else {
counter++;
}
}
return offset + 2;
}
// max result size = length * 2; returns compressed length
size_t compressRLE(const ubyte* src, size_t length, ubyte* dst) {
if (length == 0)
return 0;
size_t offset = 0;
uint counter = 0;
ubyte c = src[0];
for (size_t i = 1; i < length; i++){
ubyte cnext = src[i];
if (cnext != c || counter == 255){
dst[offset++] = counter;
dst[offset++] = c;
c = cnext;
counter = 0;
} else {
counter++;
}
}
dst[offset++] = counter;
dst[offset++] = c;
return offset;
}