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Verify decoded SawyerChunks

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This commit is contained in:
Michał Janiszewski
2017-07-31 22:13:24 +02:00
committed by Michał Janiszewski
parent 9ef629a47d
commit 0fe60663bf
1 changed files with 4 additions and 0 deletions
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4
src/openrct2/util/sawyercoding.c
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@@ -243,16 +243,20 @@ static size_t decode_chunk_rle_with_size(const uint8* src_buffer, uint8* dst_buf
dst = dst_buffer;
assert(length > 0);
assert(dstSize > 0);
for (size_t i = 0; i < length; i++) {
rleCodeByte = src_buffer[i];
if (rleCodeByte & 128) {
i++;
count = 257 - rleCodeByte;
assert(dst + count <= dst_buffer + dstSize);
assert(i < length);
memset(dst, src_buffer[i], count);
dst = (uint8*)((uintptr_t)dst + count);
} else {
assert(dst + rleCodeByte + 1 <= dst_buffer + dstSize);
assert(i + 1 < length);
memcpy(dst, src_buffer + i + 1, rleCodeByte + 1);
dst = (uint8*)((uintptr_t)dst + rleCodeByte + 1);
i += rleCodeByte + 1;