Scilab 6.0.1
- Aide de Scilab
- API Scilab
- legacy
- Low level functions
- AssignOutputVariable
- CallOverloadFunction
- CheckInputArgument
- CheckOutputArgument
- ReturnArguments
- UpdateStack
- Boolean reading (Scilab gateway)
- Boolean writing (Scilab gateway)
- Boolean sparse reading (Scilab gateway)
- Boolean sparse writing (Scilab gateway)
- Check variable dimensions (Scilab gateway)
- Variable Reference (Scilab gateway)
- Variable dimension (Scilab gateway)
- Variable Type (Scilab gateway)
- Variable Complexity (Scilab gateway)
- Matrix Type (Scilab gateway)
- deleteNamedVariable
- Double reading (Scilab gateway)
- Double writing (Scilab gateway)
- getNbInputArgument (Scilab gateway)
- getNbOutputArgument (Scilab gateway)
- Handle reading (Scilab gateway)
- Handle writing (Scilab gateway)
- Integer Precision (Scilab gateway)
- Integer reading (Scilab gateway)
- Integer writing (Scilab gateway)
- nbInputArgument (Scilab gateway)
- Pointer reading (Scilab gateway)
- Pointer writing (Scilab gateway)
- Polynomial Symbolic Variable (Scilab gateway)
- Polynomial reading (Scilab gateway)
- Polynomial writing (Scilab gateway)
- Sparse matrix reading (Scilab gateway)
- Sparse writing (Scilab gateway)
- String reading (Scilab gateway)
- String writing (Scilab gateway)
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 This page might be outdated.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.
Variable Type (Scilab gateway)
How to get the type of an argument or a variable within a gateway.
Syntax
Input argument profile:
SciErr getVarType(void* _pvCtx, int* _piAddress, int* _piType)
Named variable profile:
SciErr getNamedVarType(void* _pvCtx, const char* _pstName, int* _piType)
Arguments
- _pvCtx
Scilab environment pointer, pass in "pvApiCtx" provided by api_scilab.h
- _piAddress
The address of the variable
- _pstName
Scilab variable name.
- _piType
Scilab type of the variable (sci_matrix, sci_strings, sci_ints, ...).
Note that the list of the different variable types is available as an enum in sci_types.h.
- SciErr
Error structure where is stored errors messages history and first error number.
Description
This help describes how to retrieve the Scilab type of a variable in a gateway.
Gateway Source
#include "api_scilab.h" SciErr printf_info(int _iVar); int common_function(char *fname,void* pvApiCtx) { SciErr sciErr; int i; int *piAddr1 = NULL; int iBool = 0; for(i = 0 ; i < nbInputArgument(pvApiCtx) ; i++) { sciErr = printf_info(i + 1); if(sciErr.iErr) { printError(&sciErr, 0); break; } sciprint("\n\n"); } //1 for true, 0 for false iBool = sciErr.iErr == 0 ? 1 : 0; sciErr = createMatrixOfBoolean(pvApiCtx, nbInputArgument(pvApiCtx) + 1, 1, 1, &iBool); if(sciErr.iErr) { printError(&sciErr, 0); return 0; } //assign allocated variables to Lhs position AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1; return 0; } SciErr printf_info(int _iVar) { SciErr sciErr; int* piAddr = NULL; int iType = 0; int iRows = 0; int iCols = 0; int iItem = 0; int iComplex = 0; sciErr = getVarAddressFromPosition(pvApiCtx, _iVar, &piAddr); if(sciErr.iErr) { return sciErr; } sciprint("Variable %d information:\n", _iVar); sciErr = getVarType(pvApiCtx, piAddr, &iType); if(sciErr.iErr) { return sciErr; } sciprint("\tType: "); switch(iType) { case sci_matrix : sciprint("double\n"); break; case sci_poly : sciprint("polynomial\n"); break; case sci_boolean : sciprint("boolean\n"); break; case sci_sparse : sciprint("sparse\n"); break; case sci_boolean_sparse : sciprint("boolean_sparse\n"); break; case sci_ints : { char pstSigned[] = "signed"; char pstUnsigned[] = "unsigned"; char* pstSign = pstSigned; int iPrec = 0; sciErr = getMatrixOfIntegerPrecision(pvApiCtx, piAddr, &iPrec); if(sciErr.iErr) { return sciErr; } if(iPrec > 10) { pstSign = pstUnsigned; } sciprint("%s integer %d bits\n", pstSign, (iPrec % 10) * 8); } break; case sci_strings : sciprint("strings\n"); break; case sci_list : sciprint("list\n"); break; case sci_tlist : sciprint("tlist\n"); break; case sci_mlist : sciprint("mlist\n"); break; default : sciprint("Not manage by this function\n"); return sciErr; } if(isVarComplex(pvApiCtx, piAddr)) { sciprint("\tComplex: Yes\n"); } sciprint("\tDimensions: "); if(isVarMatrixType(pvApiCtx, piAddr)) { sciErr = getVarDimension(pvApiCtx, piAddr, &iRows, &iCols); if(sciErr.iErr) { return sciErr; } sciprint("%d x %d", iRows, iCols); } else { sciErr = getListItemNumber(pvApiCtx, piAddr, &iItem); if(sciErr.iErr) { return sciErr; } sciprint("%d", iItem); } return sciErr; }
Scilab test script
See also
- sci_types — a C enumeration which defines the types available for a variable
- isPolyType — Check if it is a polynomial variable.
- isBooleanType — Check if it is a boolean variable.
- isListType — Check if it is a list, mlist, tlist variable.
- isDoubleType — Check if it is a double variable.
- isIntegerType — Check if it is a double variable.
- isSparseType — Check if it is a sparse variable.
- isBooleanSparseType — Check if it is a boolean sparse variable.
- isStringType — Check if it is a string variable.
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