Function cvMemStorageAlloc

deps/opencv/modules/core/src/datastructs.cpp:316–342

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

/* Allocate continuous buffer of the specified size in the storage: */
CV_IMPL void*
cvMemStorageAlloc( CvMemStorage* storage, size_t size )
{
    schar *ptr = 0;
    if( !storage )
        CV_Error( CV_StsNullPtr, "NULL storage pointer" );

    if( size > INT_MAX )
        CV_Error( CV_StsOutOfRange, "Too large memory block is requested" );

    assert( storage->free_space % CV_STRUCT_ALIGN == 0 );

    if( (size_t)storage->free_space < size )
    {
        size_t max_free_space = cvAlignLeft(storage->block_size - sizeof(CvMemBlock), CV_STRUCT_ALIGN);
        if( max_free_space < size )
            CV_Error( CV_StsOutOfRange, "requested size is negative or too big" );

        icvGoNextMemBlock( storage );
    }

    ptr = ICV_FREE_PTR(storage);
    assert( (size_t)ptr % CV_STRUCT_ALIGN == 0 );
    storage->free_space = cvAlignLeft(storage->free_space - (int)size, CV_STRUCT_ALIGN );

    return ptr;
}


CV_IMPL CvString