static bool AppendEntry(str::Str<char>& data, str::Str<char>& content, const WCHAR *filePath, const char *inArchiveName, lzma::FileInfo *fi=NULL) { size_t nameLen = str::Len(inArchiveName); CrashIf(nameLen > UINT32_MAX - 25); uint32_t headerSize = 25 + (uint32_t)nameLen; FILETIME ft = file::GetModificationTime(filePath); if (fi && FileTimeEq(ft, fi->ftModified)) { ReusePrevious: ByteWriterLE meta(data.AppendBlanks(24), 24); meta.Write32(headerSize); meta.Write32(fi->compressedSize); meta.Write32(fi->uncompressedSize); meta.Write32(fi->uncompressedCrc32); meta.Write32(ft.dwLowDateTime); meta.Write32(ft.dwHighDateTime); data.Append(inArchiveName, nameLen + 1); return content.AppendChecked(fi->compressedData, fi->compressedSize); } size_t fileDataLen; ScopedMem<char> fileData(file::ReadAll(filePath, &fileDataLen)); if (!fileData || fileDataLen >= UINT32_MAX) { fprintf(stderr, "Failed to read \"%S\" for compression\n", filePath); return false; } uint32_t fileDataCrc = crc32(0, (const uint8_t *)fileData.Get(), (uint32_t)fileDataLen); if (fi && fi->uncompressedCrc32 == fileDataCrc && fi->uncompressedSize == fileDataLen) goto ReusePrevious; size_t compressedSize = fileDataLen + 1; ScopedMem<char> compressed((char *)malloc(compressedSize)); if (!compressed) return false; if (!Compress(fileData, fileDataLen, compressed, &compressedSize)) return false; ByteWriterLE meta(data.AppendBlanks(24), 24); meta.Write32(headerSize); meta.Write32((uint32_t)compressedSize); meta.Write32((uint32_t)fileDataLen); meta.Write32(fileDataCrc); meta.Write32(ft.dwLowDateTime); meta.Write32(ft.dwHighDateTime); data.Append(inArchiveName, nameLen + 1); return content.AppendChecked(compressed, compressedSize); }