Matrix Type (Scilab gateway)
How to know if an argument or a variable is stored as a matrix.
Syntax
Input argument profile:
int isVarMatrixType(void* _pvCtx, int* _piAddress)
Named variable profile:
int isNamedVarMatrixType(void* _pvCtx, const char *_pstName)
Arguments
- _pvCtx
Scilab environment pointer, pass in "pvApiCtx" provided by api_scilab.h
- _piAddress
Address of the variable
- Returned value
1 if the variable is stored as matrix otherwise 0.
Description
This help describes how to know if a variable is stored as a matrix.
In some cases (exemple: list), a variable is not stored as a standard Scilab matrix. This function provides a way to handle both cases.
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
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