Function cvRestoreMemStoragePos

deps/opencv/modules/core/src/datastructs.cpp:278–312

Restore memory storage position: */

/* Restore memory storage position: */
CV_IMPL void
cvRestoreMemStoragePos( CvMemStorage * storage, CvMemStoragePos * pos )
{
    if( !storage || !pos )
        CV_Error( CV_StsNullPtr, "" );
    if( pos->free_space > storage->block_size )
        CV_Error( CV_StsBadSize, "" );

    /*
    // this breaks icvGoNextMemBlock, so comment it off for now
    if( storage->parent && (!pos->top || pos->top->next) )
    {
        CvMemBlock* save_bottom;
        if( !pos->top )
            save_bottom = 0;
        else
        {
            save_bottom = storage->bottom;
            storage->bottom = pos->top->next;
            pos->top->next = 0;
            storage->bottom->prev = 0;
        }
        icvDestroyMemStorage( storage );
        storage->bottom = save_bottom;
    }*/

    storage->top = pos->top;
    storage->free_space = pos->free_space;

    if( !storage->top )
    {
        storage->top = storage->bottom;
        storage->free_space = storage->top ? storage->block_size - sizeof(CvMemBlock) : 0;
    }
}


/* Allocate continuous buffer of the specified size in the storage: */