Initial community commit

Src/external_dependencies/openmpt-trunk/unarchiver/archive.h

@@ -0,0 +1,96 @@
+/*
+ * archive.h
+ * ---------
+ * Purpose: archive loader
+ * Notes  : (currently none)
+ * Authors: OpenMPT Devs
+ * The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
+ */
+
+#pragma once
+
+#include "openmpt/all/BuildSettings.hpp"
+
+#include "../common/FileReader.h"
+#include <string>
+#include <vector>
+
+OPENMPT_NAMESPACE_BEGIN
+
+enum class ArchiveFileType
+{
+	Invalid,
+	Normal,
+	Special,
+};
+
+struct ArchiveFileInfo
+{
+	mpt::PathString name;
+	ArchiveFileType type = ArchiveFileType::Invalid;
+	uint64 size = 0;
+	mpt::ustring comment;
+	uint64 cookie1 = 0;
+	uint64 cookie2 = 0;
+};
+
+class IArchive
+{
+public:
+	using const_iterator = std::vector<ArchiveFileInfo>::const_iterator;
+protected:
+	IArchive() {}
+public:
+	virtual ~IArchive() {}
+
+public:
+	virtual bool IsArchive() const = 0;
+	virtual mpt::ustring GetComment() const = 0;
+	virtual bool ExtractFile(std::size_t index) = 0;
+	virtual FileReader GetOutputFile() const = 0;
+	virtual std::size_t size() const = 0;
+	virtual IArchive::const_iterator begin() const = 0;
+	virtual IArchive::const_iterator end() const = 0;
+	virtual const ArchiveFileInfo & operator [] (std::size_t index) const = 0;
+};
+
+class ArchiveBase
+ : public IArchive
+{
+protected:
+	FileReader inFile;
+	mpt::ustring comment;
+	std::vector<ArchiveFileInfo> contents;
+	std::vector<char> data;
+public:
+	ArchiveBase(const FileReader &inFile)
+		: inFile(inFile)
+	{
+		return;
+	}
+	~ArchiveBase() override
+	{
+		return;
+	}
+	bool ExtractFile(std::size_t index) override { MPT_UNREFERENCED_PARAMETER(index); return false; } // overwrite this
+public:
+	bool IsArchive() const override
+	{
+		return !contents.empty();
+	}
+	mpt::ustring GetComment() const override
+	{
+		return comment;
+	}
+	FileReader GetOutputFile() const override
+	{
+		return FileReader(mpt::byte_cast<mpt::const_byte_span>(mpt::as_span(data)));
+	}
+	std::size_t size() const override { return contents.size(); }
+	IArchive::const_iterator begin() const override { return contents.begin(); }
+	IArchive::const_iterator end() const override { return contents.end(); }
+	const ArchiveFileInfo & operator [] (std::size_t index) const override { return contents[index]; }
+};
+
+
+OPENMPT_NAMESPACE_END