array_setdesc.c

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/* descriptor set, for non-dynamic local arrays */

#include "fb.h"

void fb_ArraySetDesc
        (
                FBARRAY *array,
                void *ptr,
                size_t element_len,
                size_t dimensions,
                ...
        )
{
    va_list ap;
        size_t i, elements;
        ssize_t diff;
    FBARRAYDIM *dim;
        ssize_t lbTB[FB_MAXDIMENSIONS];
        ssize_t ubTB[FB_MAXDIMENSIONS];

    va_start( ap, dimensions );

    dim = &array->dimTB[0];

    for( i = 0; i < dimensions; i++ )
    {
                lbTB[i] = va_arg( ap, ssize_t );
                ubTB[i] = va_arg( ap, ssize_t );

        dim->elements = (ubTB[i] - lbTB[i]) + 1;
        dim->lbound = lbTB[i];
        dim->ubound = ubTB[i];
        ++dim;
    }

    va_end( ap );

    elements = fb_hArrayCalcElements( dimensions, &lbTB[0], &ubTB[0] );
    diff = fb_hArrayCalcDiff( dimensions, &lbTB[0], &ubTB[0] ) * element_len;

    array->ptr = ptr;

    FB_ARRAY_SETDESC( array, element_len, dimensions, elements * element_len, diff );
}