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 =

   5