GitPack.h

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#ifndef GITPACK_H
#define GITPACK_H
 
#include "GitTypes.h"
#include <QIODevice>
#include <cstdint>
 
struct GitPackIdxItem;
 
struct GitPackInfo {
    GitObject::Type type = GitObject::Type::UNKNOWN;
    size_t expanded_size = 0;
    uint64_t offset = 0;
    QString ref_id;
    uint32_t checksum = 0;
};
 
struct GitPackObject : public GitPackInfo {
    QByteArray content;
    size_t packed_size = 0;
};
 
class GitPack {
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, GitPackObject *out);
    static bool load(QString const &packfile, GitPackIdxItem const *item, GitPackObject *out);
    static bool seekPackedObject(QIODevice *file, GitPackIdxItem const *item, GitPackInfo *out);
    static void decodeTree(QByteArray *out);
    static GitObject::Type stripHeader(QByteArray *out);
};
 
#endif // GITPACK_H