Scilab 5.5.2
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String management
How to manage Scilab's String read and write process using call_scilab and api_scilab
Description
This help describes how strings and matrix of strings can be handle through the Call Scilab API and api Scilab.
There are several functions which can be used to read / write from the memory of Scilab. These functions are described in dedicated pages.
Note: Access to variables is done through api Scilab (named variable). |
Examples
// This example shows how to write a Scilab string in Scilab engine // It is the equivalent to A="my Message"; in Scilab interpretor // See: modules/call_scilab/examples/basicExamples/readwritestring.c // StartScilab int row = 1, col = 1; /* Size of the matrix */ /* Declare the string */ char **myMatrixOfString = (char**)malloc(sizeof(char*) * row * col); myMatrixOfString[0]="my Message"; char variableName[] = "A"; SciErr sciErr; /* Write it into Scilab's memory */ sciErr = createNamedMatrixOfString(pvApiCtx, variableName, row, col, myMatrixOfString); if(sciErr.iErr) { printError(&sciErr, 0); } /* * Prior to Scilab 5.2 * C2F(cwritechain)(variableName, &sizeOfMyString , myString, strlen(variableName), sizeOfMyString); */ printf("Display from Scilab of A:\n"); SendScilabJob("disp(A);"); /* Display A */
/* Load the previously set variable A */ // See: modules/call_scilab/examples/basicExamples/readwritestring.c char variableToBeRetrieved[]="A"; int iRows = 0; int iCols = 0; int i,j; int* piAddr = NULL; int* piLen = NULL; char** pstData = NULL; SciErr sciErr; //first call to retrieve dimensions sciErr = readNamedMatrixOfString(pvApiCtx,variableToBeRetrieved,&iRows, &iCols, NULL, NULL); if(sciErr.iErr) { printError(&sciErr, 0); } piLen = (int*)malloc(sizeof(int) * iRows * iCols); //second call to retrieve length of each string sciErr = readNamedMatrixOfString(pvApiCtx,variableToBeRetrieved, &iRows, &iCols, piLen, NULL); if(sciErr.iErr) { printError(&sciErr, 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 = readNamedMatrixOfString(pvApiCtx, variableToBeRetrieved, &iRows, &iCols, piLen, pstData); if(sciErr.iErr) { printError(&sciErr, 0); } printf("\n"); printf("Load and display of A:\n"); for(j = 0 ; j < iCols ; j++) { for(i = 0 ; i < iRows ; i++) { /* Display the formated matrix with same scilab indice */ printf("[%d,%d] = %s\n",j+1,i+1,pstData[j* iRows + i]); } } printf("\n"); free(piLen); for(i = 0 ; i < iRows * iCols ; i++) { free(pstData[i]); } free(pstData);
See Also
- Call_Scilab — call_scilabは, C/C++コードからScilabエンジンをコールする機能を提供する インターフェイスです.
- api Scilab — api_scilab はScilabメモリにデータを読み書きするための Scilabインターフェイスです
- SendScilabJob — Send a Scilab task from a C/C++ code (call_scilab)
- StartScilab — Initializes and starts Scilab engine in Call Scilab
- Call_Scilab: Boolean Management — How to manage Scilab's boolean read and write process using call_scilab and api_scilab
- Call_Scilab: Double Management — How to manage Scilab's variable read and write process using call_scilab and api_scilab
- API_Scilab: Boolean Reading — 論理値の行列を読み込む方法.
- API_Scilab: Boolean Writing — 論理値の行列を書き込む方法.
- API_Scilab: Double Reading — ゲートウェイ内でdoubleの行列を読み込む方法.
- API_Scilab: Double Writing — ゲートウェイでdoubleの行列を書き込む方法.
- Complex Management — How to manage Scilab's complex variable read and write process using call_scilab
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