- 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 This page might be outdated.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.
String reading (Scilab gateway)
How to read matrices of strings in a gateway.
Syntax
Input argument profile:
SciErr getMatrixOfString(void* _pvCtx, int* _piAddress, int* _piRows, int* _piCols, int* _piLength, char** _pstStrings)
SciErr getMatrixOfWideString(void* _pvCtx, int* _piAddress, int* _piRows, int* _piCols, int* _piLength, wchar_t** _pwstStrings)
Named variable profile:
SciErr createNamedMatrixOfString(void* _pvCtx, const char* _pstName, int _iRows, int _iCols, char** _pstStrings)
SciErr createNamedMatrixOfWideString(void* _pvCtx, const char* _pstName, int _iRows, int _iCols, wchar_t** _pwstStrings)
Arguments
- _pvCtx
Scilab environment pointer, pass in "pvApiCtx" provided by api_scilab.h.
- _piAddress
Address of the Scilab variable.
- _pstName
Name of the variable for "named" functions.
- _piRows
Return number of rows.
- _piCols
Return number of columns.
- _piLength
Address of array of strings length (must be allocated size: _piRows * _piCols)
- _pstStrings
Address of array of char* (must be allocated size: _piRows * _piCols)
- _pwstStrings
Address of array of wchar_t* (must be allocated size: _piRows * _piCols)
- SciErr
Error structure where is stored errors messages history and first error number.
Description
This help describes how matrix of strings can be handled through the Scilab API.
Gateway Source
#include "api_scilab.h" int read_string(char *fname,void* pvApiCtx) { SciErr sciErr; int i,j; int iLen = 0; //variable info int iRows = 0; int iCols = 0; int* piAddr = NULL; int* piLen = NULL; char** pstData = NULL; //output variable int iRowsOut = 1; int iColsOut = 1; char* pstOut = NULL; //check input and output arguments CheckInputArgument(pvApiCtx, 1, 1); CheckOutputArgument(pvApiCtx, 1, 1); //get variable address sciErr = getVarAddressFromPosition(pvApiCtx, 1, &piAddr); if(sciErr.iErr) { printError(&sciErr, 0); return 0; } //first call to retrieve dimensions sciErr = getMatrixOfString(pvApiCtx, piAddr, &iRows, &iCols, NULL, NULL); if(sciErr.iErr) { printError(&sciErr, 0); return 0; } piLen = (int*)malloc(sizeof(int) * iRows * iCols); //second call to retrieve length of each string sciErr = getMatrixOfString(pvApiCtx, piAddr, &iRows, &iCols, piLen, NULL); if(sciErr.iErr) { printError(&sciErr, 0); return 0; } pstData = (char**)malloc(sizeof(char*) * iRows * iCols); for(i = 0 ; i < iRows * iCols ; i++) { pstData[i] = (char*)malloc(sizeof(char) * (piLen[i] + 1));//+ 1 for null termination } //third call to retrieve data sciErr = getMatrixOfString(pvApiCtx, piAddr, &iRows, &iCols, piLen, pstData); if(sciErr.iErr) { printError(&sciErr, 0); return 0; } //computer length of all strings for(i = 0 ; i < iRows * iCols ; i++) { iLen += piLen[i]; } //alloc output variable pstOut = (char*)malloc(sizeof(char) * (iLen + iRows * iCols)); //initialize string to 0x00 memset(pstOut, 0x00, sizeof(char) * (iLen + iRows * iCols)); //concat input strings in output string for(i = 0 ; i < iRows ; i++) { for(j = 0 ; j < iCols ; j++) { int iCurLen = strlen(pstOut); if(iCurLen) { strcat(pstOut, " "); } strcpy(pstOut + strlen(pstOut), pstData[j * iRows + i]); } } //create new variable sciErr = createMatrixOfString(pvApiCtx, nbInputArgument(pvApiCtx) + 1, iRowsOut, iColsOut, &pstOut); if(sciErr.iErr) { printError(&sciErr, 0); return 0; } //free memory free(piLen); for(i = 0 ; i < iRows * iCols ; i++) { free(pstData[i]); } free(pstData); free(pstOut); AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1; return 0; }
Scilab test script
a_ref = ["may the puffin be with you"]; a = ["may", "the", "puffin"; "be","with","you"]; b = read_string(a); if a_ref <> b then error("failed"), end
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