/*
 * Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
 * Distributed under the terms of the MIT License.
 */
#ifndef _PACKAGE__HPKG__V1__PRIVATE__HAIKU_PACKAGE_H_
#define _PACKAGE__HPKG__V1__PRIVATE__HAIKU_PACKAGE_H_


#include <SupportDefs.h>

#include <package/hpkg/HPKGDefs.h>


namespace BPackageKit {

namespace BHPKG {

namespace V1 {

namespace BPrivate {


// header
struct hpkg_header {
        uint32  magic;                                                  // "hpkg"
        uint16  header_size;
        uint16  version;
        uint64  total_size;

        // package attributes section
        uint32  attributes_compression;
        uint32  attributes_length_compressed;
        uint32  attributes_length_uncompressed;
        uint32  attributes_strings_length;
        uint32  attributes_strings_count;

        // TOC section
        uint32  toc_compression;
        uint64  toc_length_compressed;
        uint64  toc_length_uncompressed;
        uint64  toc_strings_length;
        uint64  toc_strings_count;
};


// header
struct hpkg_repo_header {
        uint32  magic;                                                  // "hpkr"
        uint16  header_size;
        uint16  version;
        uint64  total_size;

        // repository info section
        uint32  info_compression;
        uint32  info_length_compressed;
        uint32  info_length_uncompressed;

        // package attributes section
        uint32  packages_compression;
        uint64  packages_length_compressed;
        uint64  packages_length_uncompressed;
        uint64  packages_strings_length;
        uint64  packages_strings_count;
};


// attribute tag arithmetics
// (using 6 bits for id, 3 for type, 1 for hasChildren and 2 for encoding)
static inline uint16
compose_attribute_tag(uint16 id, uint16 type, uint16 encoding, bool hasChildren)
{
        return ((encoding << 10) | (uint16(hasChildren ? 1 : 0) << 9) | (type << 6)
                        | id)
                + 1;
}


static inline uint16
attribute_tag_encoding(uint16 tag)
{
        return ((tag - 1) >> 10) & 0x3;
}


static inline bool
attribute_tag_has_children(uint16 tag)
{
        return (((tag - 1) >> 9) & 0x1) != 0;
}


static inline uint16
attribute_tag_type(uint16 tag)
{
        return ((tag - 1) >> 6) & 0x7;
}


static inline uint16
attribute_tag_id(uint16 tag)
{
        return (tag - 1) & 0x3f;
}


}       // namespace BPrivate

}       // namespace V1

}       // namespace BHPKG

}       // namespace BPackageKit


#endif  // _PACKAGE__HPKG__V1__PRIVATE__HAIKU_PACKAGE_H_