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Relaxes test for a valid TAP.

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This commit is contained in:
Thomas Harte 2021-03-21 20:31:09 -04:00
parent 9ce1dbaebb
commit 388b136980
1 changed files with 5 additions and 9 deletions
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14
Storage/Tape/Formats/ZXSpectrumTAP.cpp
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@ -22,19 +22,15 @@ ZXSpectrumTAP::ZXSpectrumTAP(const std::string &file_name) :
file_(file_name)
{
// Check for a continuous series of blocks through to
// file end, alternating header and data.
uint8_t next_block_type = 0x00;
// exactly file end.
//
// To consider: could also check those blocks of type 0
// and type ff for valid checksums?
while(true) {
const uint16_t block_length = file_.get16le();
const uint8_t block_type = file_.get8();
if(file_.eof()) throw ErrorNotZXSpectrumTAP;
if(block_type != next_block_type) {
throw ErrorNotZXSpectrumTAP;
}
next_block_type ^= 0xff;
file_.seek(block_length - 1, SEEK_CUR);
file_.seek(block_length, SEEK_CUR);
if(file_.tell() == file_.stats().st_size) break;
}