class FilterStream virtual size_t read(BYTE* buf, size_t len) = 0; virtual size_t write(BYTE* buf, size_t len) = 0; ; class GzipFilter : public FilterStream z_stream zs; // inflate/deflate with Z_SYNC_FLUSH ;
// Create parent directories CreateDirectoryTree(GetDirectory(fullPath)); tar utility for windows
Simplified approach: Store mode in pax extended header, apply best effort on Windows (ignore group/other bits, map owner read/write to deny/allow ACL entries). Detect sparse files on Windows via FSCTL_QUERY_ALLOCATED_RANGES : class FilterStream virtual size_t read(BYTE* buf
On extraction, recreate ADS via CreateFile with filename:streamname . POSIX mode → NTFS conversion: size_t len) = 0
// Write header block WriteBlock(&header, 512); padToEvenBlock = false;
// Windows-specific mode mapping header.mode[0] = '0'; header.mode[1] = info.isReadOnly ? '4' : '6'; strcpy(header.magic, "ustar");
// Write file content if (!info.isDirectory) HANDLE h = CreateFileW(path.c_str(), GENERIC_READ, ...); WriteFileContent(h, info.size);