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Corrected decompressed size expectations: it may be up to five times the size of the number of waves, as waves are up to five bytes in length.

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Thomas Harte 2017-07-17 19:04:25 -04:00
parent 7b5f93510b
commit eafdd7dbd7
1 changed files with 8 additions and 2 deletions
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10
Storage/Tape/Formats/CSW.cpp
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@ -59,14 +59,20 @@ CSW::CSW(const char *file_name) :
}
if(compression_type_ == ZRLE) {
source_data_.resize((size_t)number_of_waves);
// The only clue given by CSW as to the output size in bytes is that there will be
// number_of_waves waves. Waves are usually one byte, but may be five. So this code
// is pessimistic.
source_data_.resize((size_t)number_of_waves * 5);
std::vector<uint8_t> file_data;
size_t remaining_data = (size_t)file_stats_.st_size - (size_t)ftell(file_);
file_data.resize(remaining_data);
fread(file_data.data(), sizeof(uint8_t), remaining_data, file_);
uLongf output_length = (uLongf)number_of_waves;
// uncompress will tell how many compressed bytes there actually were, so use its
// modification of output_length to throw away all the memory that isn't actually
// needed.
uLongf output_length = (uLongf)(number_of_waves * 5);
uncompress(source_data_.data(), &output_length, file_data.data(), file_data.size());
source_data_.resize((size_t)output_length);
} else {