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Справка Scilab >> API Scilab > Low level functions > Boolean writing (Scilab gateway)

Boolean writing (Scilab gateway)

How to write matrices of boolean.

Calling Sequence

Input argument profile:

SciErr createMatrixOfBoolean(void* _pvCtx, int _iVar, int _iRows, int _iCols, const int* _piBool)

Named variable profile:

SciErr createNamedMatrixOfBoolean(void* _pvCtx, const char* _pstName, int _iRows, int _iCols, const int* _piBool)

Arguments

_pvCtx

Scilab environment pointer, pass in "pvApiCtx" provided by api_scilab.h.

_iVar

Position in the Scilab memory where you want to put the variable.

_pstName

Name of the variable for "named" functions.

_piRows

Return number of rows of the variable.

_piCols

Return number of columns of the variable.

_piBool

Return address of data array (size: _iRows * _iCols).

SciErr

Error structure where is stored errors messages history and first error number.

Write directly in Scilab memory.

Calling Sequence

Input argument profile:

SciErr allocMatrixOfBoolean(void* _pvCtx, int _iVar, int _iRows, int _iCols, int** _piBool)

Arguments

_pvCtx

Scilab environment pointer, pass in "pvApiCtx" provided by api_scilab.h.

_iVar

Position in the Scilab memory where you want to put the variable.

_iRows

Number of rows of the new variable.

_iCols

Numbers of columns of the new variable.

_piBool

Returns address of real data array (size: _iCols * _iRows).

SciErr

Error structure where is stored errors messages history and first error number.

Description

This help describes how to write matrix of boolean.

Gateway Source

#include "api_scilab.h"

int read_write_boolean(char *fname,unsigned long fname_len)
{
    SciErr sciErr;
    int i;
    //first variable info : real matrix of double
    int iRows       = 0;
    int iCols       = 0;
    int *piAddr     = NULL;
    int* piBool     = NULL;

    //check input and output arguments
    CheckInputArgument(pvApiCtx, 1,1);
    CheckOutputArgument(pvApiCtx, 1,1);

    //get variable address of the first input argument
    sciErr = getVarAddressFromPosition(pvApiCtx, 1, &piAddr);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //get size and data from Scilab memory
    sciErr = getMatrixOfBoolean(pvApiCtx, piAddr, &iRows, &iCols, &piBool);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //Do something with data
    for(i = 0 ; i < iRows * iCols ; i++)
    {
        piBool[i] = piBool[i] == 0 ? 1 : 0;
    }

    sciErr = createMatrixOfBoolean(pvApiCtx, nbInputArgument(pvApiCtx) + 1, iRows, iCols, piBool);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
    return 0;
}

Scilab test script

a = [%t, %f, %t ; %f, %t, %f ; %t, %f, %t];
a_ref = [%f, %t, %f ; %t, %f, %t ; %f, %t, %f];
b = read_write_boolean(a);

if or(b <> a_ref) then error("failed"), end
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Last updated:
Thu Oct 02 14:01:18 CEST 2014