Please note that the recommended version of Scilab is 2025.0.0. This page might be outdated.
However, this page did not exist in the previous stable version.
get optional argument (Scilab gateway)
Calling Sequence
int getOptionals(void* _pvCtx, char* fname, rhs_opts opts[])
Arguments
- _pvCtx
Scilab environment pointer, pass in "pvApiCtx" provided by api_scilab.h
- fname
Name of the calling function.
- opts
structure array of optional argument
Description
A C gateway functions which use optional arguments.
Examples
In this example, the C interface function can take several optional arguments and prints theirs dimensions if exists.
#include "api_scilab.h" #include "sciprint.h" #include "sciprint.h" #include "sciprint.h" int sci_use_optional(char * fname) { SciErr sciErr; char* pstName = NULL; int iAge = 0; int iDL = 0; static rhs_opts opts[] = { { -1, "age", -1, 0, 0, NULL}, { -1, "drivinglicense", -1, 0, 0, NULL}, { -1, "name", -1, 0, 0, NULL}, { -1, NULL, -1, 0, 0, NULL} }; int nopt = NumOpt(); CheckInputArgument(pvApiCtx, 0, nopt); CheckOutputArgument(pvApiCtx, 0, 1); if (getOptionals(pvApiCtx, fname, opts) == 0) { //Error return 1; } if (opts[0].iPos != -1) {//age double dblAge = 0; getScalarDouble(pvApiCtx, opts[0].piAddr, &dblAge); iAge = (int)dblAge; } else { iAge = 77; } if (opts[1].iPos != -1) {//drivinglicense getScalarBoolean(pvApiCtx, opts[1].piAddr, &iDL); } else { iDL = 0; } if (opts[2].iPos != -1) {//Name getAllocatedSingleString(pvApiCtx, opts[2].piAddr, &pstName); } else { pstName = strdup("John Doe"); } sciprint("Read information: \n"); sciprint("\tName: \t\t\t%s\n", pstName); sciprint("\tAge: \t\t\t%d\n", iAge); sciprint("\tDriving licence: \t%s\n", iDL ? "Yes" : "No"); //no return value AssignOutputVariable(pvApiCtx, 0) = 1; return 0; }
Scilab test script
use_optional(); use_optional(name = "M. Puffin"); use_optional(age = 25, name = "M. Puffin"); use_optional(drivinglicense = %t, age = 25, name = "M. Puffin");
History
| Versão | Descrição |
| 5.5.0 | This function added in Scilab 5.5.0 |
| Report an issue | ||
| << optionals | optionals | polynomial >> |