First

2024-07-02 18:12:23 +02:00
commit b344afa9fe
89 changed files with 10568 additions and 0 deletions
@@ -0,0 +1,63 @@
+#pragma once
+#include "ZipBase.h"
+#include "tl/memory_buffer.h"
+#include "tl/result.h"
+#include "tl/vector.h"
+
+namespace fs
+{
+
+//////////////////////////////////////////////////////////////////////////
+
+class ISource;
+
+//////////////////////////////////////////////////////////////////////////
+
+class ZipReader : public ZipBase
+{
+public:
+	enum class ErrorCode : uint8_t
+	{
+		InvalidStream,
+		BadSignature,
+		BadOffset,
+		CorruptedFile,
+	};
+	typedef tl::error<ErrorCode> Error;
+
+	typedef tl::result<ZipReader, Error> CreateResult;
+
+	static CreateResult create(ISource& source);
+
+	struct Entry
+	{
+		tl::string name;
+		CompressionMethod compressionMethod = CompressionMethod::Store;
+		GeneralBitFlags generalBitFlags;
+		uint64_t uncompressedSize = 0;
+		uint64_t compressedSize = 0;
+		uint32_t crc32 = 0;
+		uint64_t localHeaderOffset = 0;
+		uint64_t dataOffset = 0;
+		time_t lastModTimePoint = 0;
+		tl::memory_buffer comment;
+	};
+
+	size_t getEntryCount() const;
+	const Entry& getEntry(size_t index) const;
+
+	typedef tl::result<void, Error> SeekResult;
+	SeekResult seekSourceToEntryData(const Entry& entry, ISource& o_source) const;
+
+private:
+	explicit ZipReader(tl::vector<Entry> entries);
+
+	typedef tl::result<tl::pair<uint64_t, uint64_t>, Error> CentralDirectoryResult;
+	static CentralDirectoryResult findCentralDirectoryBounds(ISource& source);
+
+	tl::vector<Entry> m_entries;
+};
+
+//////////////////////////////////////////////////////////////////////////
+
+}