usbloadergx/source/usbloader/frag.h

// worst case wbfs fragmentation scenario:
// 9GB (dual layer) / 2mb (wbfs sector size) = 4608
#define MAX_FRAG 20000
// max that ehcmodule_frag will allow at the moment is about:
// 40000/4/3-1 = 21844

#ifdef __cplusplus
extern "C"
{
#endif

#include "libwbfs/libwbfs.h"

    typedef struct
    {
            u32 offset; // file offset, in sectors unit
            u32 sector;
            u32 count;
    } Fragment;

    typedef struct
    {
            u32 size; // num sectors
            u32 num; // num fragments
            u32 maxnum;
            Fragment frag[MAX_FRAG];
    } FragList;

    typedef int (*frag_append_t)(void *ff, u32 offset, u32 sector, u32 count);

    int _FAT_get_fragments(const char *path, _frag_append_t append_fragment, void *callback_data);

    void frag_init(FragList *ff, int maxnum);
    int frag_append(FragList *ff, u32 offset, u32 sector, u32 count);
    int _frag_append(void *ff, u32 offset, u32 sector, u32 count);
    int frag_concat(FragList *ff, FragList *src);

    // in case a sparse block is requested,
    // the returned poffset might not be equal to requested offset
    // the difference should be filled with 0
    int frag_get(FragList *ff, u32 offset, u32 count, u32 *poffset, u32 *psector, u32 *pcount);

    int frag_remap(FragList *ff, FragList *log, FragList *phy);

    int get_frag_list(u8 *id);
    int set_frag_list(u8 *id);

#ifdef __cplusplus
}
#endif