1 files changed, 126 insertions, 0 deletions
diff --git a/sci_gateway/cpp/sci_sym_setobj.cpp b/sci_gateway/cpp/sci_sym_setobj.cpp
new file mode 100644
index 0000000..3a4691a
--- /dev/null
+++ b/sci_gateway/cpp/sci_sym_setobj.cpp
@@ -0,0 +1,126 @@
+/*
+ * Symphony Toolbox
+ * Functions for setting the coefficients of the objective and the sense (minimization/maximization)
+ * By Keyur Joshi
+ */
+
+#include "symphony.h"
+#include "sci_iofunc.hpp"
+
+extern sym_environment* global_sym_env; //defined in globals.cpp
+
+extern "C" {
+#include "api_scilab.h"
+#include "Scierror.h"
+#include "sciprint.h"
+#include "BOOL.h"
+#include <localization.h>
+
+int sci_sym_setObjCoeff(char *fname){
+	
+	//error management variable
+	SciErr sciErr;
+	int iRet;
+	
+	//data declarations
+	int *varAddress,varIndex,numVars;
+	double inputDouble,newCoeff;
+	
+	//ensure that environment is active
+	if(global_sym_env==NULL){
+		sciprint("Error: Symphony environment not initialized. Please run 'sym_open()' first.\n");
+		return 1;
+	}
+	
+	//code to check arguments and get them
+	CheckInputArgument(pvApiCtx,2,2) ;
+	CheckOutputArgument(pvApiCtx,1,1) ;
+	
+	//get argument 1: index of variable whose coefficient is to be changed
+	if(getUIntFromScilab(1,&varIndex))
+		return 1;
+	iRet=sym_get_num_cols(global_sym_env,&numVars);
+	if(iRet==FUNCTION_TERMINATED_ABNORMALLY){
+		Scierror(999, "An error occured. Has a problem been loaded?\n");
+		return 1;
+	}else if(varIndex>=numVars){
+		Scierror(999, "An error occured. Variable index must be a number between 0 and %d.\n",numVars-1);
+		return 1;
+	}
+	
+	//get argument 2: new coefficient
+	if(getDoubleFromScilab(2,&newCoeff))
+		return 1;
+	
+	iRet=sym_set_obj_coeff(global_sym_env,varIndex,newCoeff);
+	if(iRet==FUNCTION_TERMINATED_ABNORMALLY){
+		Scierror(999, "An error occured. Has a problem been loaded?\n");
+		return 1;
+	}else{
+		sciprint("Coefficient successfully changed.\n");
+	}
+	
+	//code to give output
+	if(return0toScilab())
+		return 1;
+	
+	return 0;
+}
+
+int sci_sym_setObjSense(char *fname){
+	
+	//error management variable
+	SciErr sciErr;
+	int iRet;
+	
+	//data declarations
+	int *varAddress;
+	double objSense;
+	
+	//ensure that environment is active
+	if(global_sym_env==NULL){
+		sciprint("Error: Symphony environment not initialized. Please run 'sym_open()' first.\n");
+		return 1;
+	}
+	
+	//code to check arguments and get them
+	CheckInputArgument(pvApiCtx,1,1) ;
+	CheckOutputArgument(pvApiCtx,1,1) ;
+	
+	//code to process input
+	sciErr = getVarAddressFromPosition(pvApiCtx, 1, &varAddress);
+	if (sciErr.iErr)
+	{
+		printError(&sciErr, 0);
+		return 1;
+	}
+	if ( !isDoubleType(pvApiCtx,varAddress) ||  isVarComplex(pvApiCtx,varAddress) )
+	{
+		Scierror(999, "Wrong type for input argument #1:\nEither 1 (sym_minimize) or -1 (sym_maximize) is expected.\n");
+		return 1;
+	}
+	iRet = getScalarDouble(pvApiCtx, varAddress, &objSense);
+	if(iRet || (objSense!=-1 && objSense!=1))
+	{
+		Scierror(999, "Wrong type for input argument #1:\nEither 1 (sym_minimize) or -1 (sym_maximize) is expected.\n");
+		return 1;
+	}
+	iRet=sym_set_obj_sense(global_sym_env,objSense);
+	if(iRet==FUNCTION_TERMINATED_ABNORMALLY){
+		Scierror(999, "An error occured.\n");
+		return 1;
+	}else{
+		if(objSense==1)
+			sciprint("The solver has been set to minimize the objective.\n");
+		else
+			sciprint("The solver has been set to maximize the objective.\n");
+	}
+	
+	//code to give output
+	if(return0toScilab())
+		return 1;
+	
+	return 0;
+}
+
+}