Scilab GetVar() Function of Scilab API

This function accepts string name of a Scilab parser variable. Its syntax is

scilabVar scilab_getVar(const wchar_t* name)

It returns variable called ``name". If variable does not exist then it returns NULL. For example

--> myV = 5;

--> myGetVar("myV")

variable is accepted by {scilab_getVar} as its argument. {scilab_getVar} function does not accept variable name directly as string but variable name string is passed through {scilab_getString} function. The correct steps for calling {scilab_getVar} function are given in following code.

.......

int sci_myGetVar(\

scilabEnv env, \

int nin, \

scilabVar* in ,\

int nopt, \

scilabOpt opt, \

int nout, \

scilabVar* out\

){

.......

//Scilab string data type variable

wchar_t* str = 0;

//Copy input "myV" into str variable

scilab_getString(env, in[0], &str);

//Get variable "myV" and return value

//assigned to scilab variable myV

out[0] = scilab_getVar(str);

.......

}

The output of Scilab interface function would be equal to the value of `myV'. The complete codes are given below:

--> cd pathconvert(TMPDIR);

--> mkdir(pathconvert(TMPDIR+'/Build_C/'));

--> cd(pathconvert(TMPDIR+'/Build_C/'));

--> [bOK, ilib] = c_link('libbuild_c');

--> if bOK then

--> ulink(ilib);

--> end

--> ifn=['#include ""api_scilab.h""'

--> '#include ""Scierror.h""'

--> '#include ""localization.h""'

--> '#include ""sciprint.h""'

--> 'const char fname[] = ""myGetVar"";'

--> 'int sci_myGetVar(scilabEnv env, \'

--> ' int nin, scilabVar* in, \'

--> ' int nopt, scilabOpt opt, \'

--> ' int nout, scilabVar* out) '

--> '{'

--> ' wchar_t* str = 0;'

--> ' scilab_getString(env, in[0], &str);'

--> ' out[0] = scilab_getVar(str);'

--> ' return 0;'

--> '}'];

--> //Copy interface as mymyGetVar.c file

--> mputl(ifn,pathconvert(TMPDIR+'/Build_C/mymyGetVar.c',%F));

--> files=['mymyGetVar.c'];

--> //Create the shared library (a gateway, //

--> //a Makefile and a loader are generated. //

--> ilib_build('build_c',["myGetVar","sci_myGetVar","csci6"],files,[]);

--> // load the shared library by executing loader.sce

--> exec loader.sce;

--> //Use the new function

--> v = 5;

--> [a]=myGetVar("v")

a =