source: issm/trunk-jpl/src/c/classes/Options/OptionUtilities.cpp@ 15012

/*!\file OptionUtilities.cpp
 * \brief: implementation of the options utilities
 */

/*Headers:*/
/*{{{*/
#ifdef HAVE_CONFIG_H
        #include <config.h>
#else
#error "Cannot compile with HAVE_CONFIG_H symbol! run configure first!"
#endif

#include "../classes.h"
#include "../../shared/shared.h"
/*}}}*/

/*FUNCTION ColumnWiseDimsFromIndex{{{*/
int ColumnWiseDimsFromIndex(int* dims,int index,int* size,int ndims){

        int   i;
        int   aprod=1;

        /*check for index too large  */
        for (i=0;i<ndims;i++) aprod*=size[i];
        if (index >= aprod) _error_("Index " << index << " exceeds number of elements " << aprod << ".");

        /*calculate the dimensions (being careful of integer division)  */
        for (i=ndims-1; i>=0; i--) {
                aprod=reCast<int>(((IssmPDouble)aprod+0.5)/(IssmPDouble)size[i]);
                dims[i]=(int)floor(((IssmPDouble)index+0.5)/(IssmPDouble)aprod);
                index-=dims[i]*aprod;
        }

        return(0);
}/*}}}*/
/*FUNCTION IndexFromColumnWiseDims{{{*/
int IndexFromColumnWiseDims(int* dims, int* size, int ndims) {

        int   i;
        int   index=0;

        /*check for any dimension too large  */
        for (i=0;i<ndims;i++){
                if (dims[i] >= size[i]) _error_("Dimension " << i << " of " << dims[i] << " exceeds size of " << size[i] << ".");
        }

        /*calculate the index  */
        for (i=ndims-1; i>=0; i--){
                index*=size[i];
                index+=dims[i];
        }

        return(index);
}/*}}}*/
/*FUNCTION RowWiseDimsFromIndex{{{*/
int RowWiseDimsFromIndex(int* dims, int index, int* size, int ndims) {

        int   i;
        int   aprod=1;

        /*check for index too large  */
        for (i=0; i<ndims; i++) aprod*=size[i];
        if (index >= aprod) _error_("Index " << index << " exceeds number of elements " << aprod << ".");

        /*calculate the dimensions (being careful of integer division)  */
        for (i=0; i<ndims; i++) {
                aprod=(int)(((IssmPDouble)aprod+0.5)/(IssmPDouble)size[i]);
                dims[i]=(int)floor(((IssmPDouble)index+0.5)/(IssmPDouble)aprod);
                index-=dims[i]*aprod;
        }

        return(0);
}/*}}}*/
/*FUNCTION IndexFromRowWiseDims{{{*/
int IndexFromRowWiseDims(int* dims, int* size, int ndims) {

        int   i;
        int   index=0;

        /*check for any dimension too large  */
        for (i=0; i<ndims; i++){
                if (dims[i] >= size[i]) _error_("Dimension " << i << " of " << dims[i] << " exceeds size of " << size[i] << ".");
        }

        /*calculate the index  */
        for (i=0; i<ndims; i++) {
                index*=size[i];
                index+=dims[i];
        }

        return(index);
}/*}}}*/
/*FUNCTION StringFromDims{{{*/
int StringFromDims(char* cstr, int* dims, int ndims) {

        sprintf(&cstr[0],"[");
        for(int i=0; i<ndims-1; i++) sprintf(&cstr[strlen(cstr)],"%d,",dims[i]);
        sprintf(&cstr[strlen(cstr)],"%d]",dims[ndims-1]);

        return(0);
}/*}}}*/
/*FUNCTION StringFromSize{{{*/
int StringFromSize(char* cstr, int* size, int ndims) {

        sprintf(&cstr[0],"[");
        for(int i=0; i<ndims-1; i++) sprintf(&cstr[strlen(cstr)],"%dx",size[i]);
        sprintf(&cstr[strlen(cstr)],"%d]",size[ndims-1]);

        return(0);
}/*}}}*/