pureikyubu/Docs/RE/dvdopen.txt

// FST Entry
typedef struct
{
    u8      isDir;                  // 1, if directory
    u8      nameOffsetHi;
    u16     nameOffsetLo;
    union
    {
        struct                      // root entry
        {
            u32     reservedZero;
            s32     entryNum;
        };
        struct                      // file
        {
            u32     fileOffset;
            u32     fileLength;
        };
        struct                      // directory
        {
            u32     parentOffset;   // previous
            u32     nextOffset;     // next
        };
    };
} DVDEntry;

DVDEntry * FstStart;            // set after dvd fs init


BOOL DVDOpen(char* fileName, DVDFileInfo* fileInfo)
{
    if(fileName == NULL)
        OSHalt("DVDOpen(): null pointer is specified to file name\n");
    if(fileInfo == NULL)
        OSHalt("DVDOpen(): null pointer is specified to file info address\n");

    s32 entrynum = DVDConvertPathToEntrynum(fileName);

    if(entrynum < 0)
    {
        char currentDir[128];
        DVDGetCurrentDir(currentDir, sizeof(currentDir));

        OSReport( "Warning: DVDOpen(): file '%s' was not found under %s.\n",
                   fileName,
                   currentDir );

        return FALSE;
    }

    DVDEntry * entry = &FstStart[entrynum];

    if( entry->isDir )
    {
        OSReport( "DVDOpen(): directory '%s' is specified as a filename\n",
                  fileName );
        return FALSE;
    }

    // save file information
    fileInfo->startAddr = entry->fileOffset;
    fileInfo->length = entry->fileLength;

    // reset callback
    fileInfo->callback = NULL;

    fileInfo->cb.state = DVD_STATE_END;

    return TRUE;
}




Reversed by org <ogamespec@gmail.com>
Last updated 11 Dec 2004