GitPack.h
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GitPack.h
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	#ifndef GITPACK_H
	#define GITPACK_H

	#include <QIODevice>
	#include <cstdint>
	#include "Git.h"

	struct GitPackIdxItem;

	class GitPack {
	public:
	struct Info {
	Git::Object::Type type = Git::Object::Type::UNKNOWN;
	size_t expanded_size = 0;
	uint64_t offset = 0;
	QString ref_id;
	uint32_t checksum = 0;
	};
	struct Object : public Info {
	QByteArray content;
	size_t packed_size = 0;
	};
	private:
	static uint32_t read_uint32_be(const void *p)
	{
	auto const q = (uint8_t const )p;
	return (q[0] << 24) \| (q[1] << 16) \| (q[2] << 8) \| q[3];
	}

	public:
	static bool decompress(QIODevice in, size_t expanded_size, QByteArray out, size_t consumed = nullptr, uint32_t crc = nullptr);
	static bool load(QIODevice file, GitPackIdxItem const item, Object *out);
	static bool load(QString const &packfile, GitPackIdxItem const item, Object out);
	static bool seekPackedObject(QIODevice file, GitPackIdxItem const item, Info *out);
	static void decodeTree(QByteArray *out);
	static Git::Object::Type stripHeader(QByteArray *out);
	};

	#endif // GITPACK_H