int sci_sym_solve(char *fname, unsigned long fname_len){
int status=0;
//check whether we have no input and one output argument or not
CheckInputArgument(pvApiCtx, 0, 0) ;//no input argument
CheckOutputArgument(pvApiCtx, 1, 1) ;//one output argument
// Check environment
if(global_sym_env==NULL)
sciprint("Error: Symphony environment is not initialized.\n");
else {// There is an environment opened
double time_limit = -1.0;
status = sym_get_dbl_param(global_sym_env,"time_limit",&time_limit);
if (status == FUNCTION_TERMINATED_NORMALLY) {
if ( time_limit < 0.0 )
sciprint("\nNote: There is no limit on time.\n");
else sciprint("\nNote: Time limit has been set to %lf.\n",time_limit);
status=process_ret_val(sym_solve(global_sym_env));// Call function
}
else {
sciprint("\nUnable to read time limit.\n");
status = 1; //Error state
}
}
// Return result to scilab
return returnDoubleToScilab(status);
}
/* Function that initializes the symphony environment
* Returns 1 on success , 0 on failure
*/
int sci_sym_open(char *fname, unsigned long fname_len){
// Error management variable
SciErr sciErr;
double status=0;
//check whether we have no input and one output argument or not
CheckInputArgument(pvApiCtx, 0, 0) ;//no input argument
CheckOutputArgument(pvApiCtx, 1, 1) ;//one output argument
//check environment
if(global_sym_env!=NULL){
sciprint("Warning: Symphony environment is already initialized.\n");
}else{
global_sym_env = sym_open_environment();//open an environment
if (!global_sym_env)
sciprint("Error: Unable to create symphony environment.\n");
else{
status=1;
//sciprint("Symphony environment is created successfully. Please run 'sym_close()' to close.\n");
//create useful variables for user
createNamedScalarDouble(pvApiCtx,"sym_minimize",1);
createNamedScalarDouble(pvApiCtx,"sym_maximize",-1);
}
}
/*write satus of function (success-1 or failure-0) as output argument to scilab*/
if(returnDoubleToScilab(status))
return 1;
return 0;
}
int sci_sym_getObjSense(char *fname){
//error management variable
SciErr sciErr;
int iRet;
//data declarations
int 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,0,0) ;
CheckOutputArgument(pvApiCtx,1,1) ;
//code to give output
iRet=sym_get_obj_sense(global_sym_env,&objSense);
if(iRet==FUNCTION_TERMINATED_ABNORMALLY){
Scierror(999, "An error occured. Has a problem been loaded?\n");
return 1;
}
if(objSense==1)
sciprint("Symphony has been set to minimize the objective.\n");
else
sciprint("Symphony has been set to maximize the objective.\n");
if(returnDoubleToScilab(objSense))
return 1;
return 0;
}
/*Function that closes symphony environment
* Returns 1 on success , 0 on failure
*/
int sci_sym_close(char *fname, unsigned long fname_len){
// Error management variable
SciErr sciErr;
double status=0;
int output;//output parameter for closing the environment
//check whether we have no input and one output argument or not
CheckInputArgument(pvApiCtx, 0, 0) ;//no input argument
CheckOutputArgument(pvApiCtx, 1, 1) ;//one output argument
if (global_sym_env==NULL){//check for environment
sciprint("Error: symphony environment is not initialized.\n");
}else{
output=sym_close_environment(global_sym_env);//close environment
if(output==ERROR__USER){
status=0;//User error detected in user_free_master() function or when function invoked unsuccessfully
sciprint("Error in user_free_master()\n");
}else if(output==FUNCTION_TERMINATED_ABNORMALLY){
status=0;//function invoked unsuccessfully
sciprint("Symphony environment could not be closed.\n");
}else if(output==FUNCTION_TERMINATED_NORMALLY){
status=1;//function invoked successfully and no error
global_sym_env=NULL;//important to set to NULL, so that other functions can detect that environment is not open.
//sciprint("Symphony environement closed successfully. Please run 'sym_open()' to restart.\n");
//delete the sym_ variables
deleteNamedVariable(pvApiCtx,"sym_minimize");
deleteNamedVariable(pvApiCtx,"sym_maximize");
}
}
/*write satus of function (success-1 or failure-0) as output argument to scilab*/
if(returnDoubleToScilab(status))
return 1;
return 0;
}
