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XSLPchguserfuncobject

XSLPchguserfuncobject

Purpose
Change or define one of the objects which can be accessed by the user functions
Synopsis
int XPRS_CC XSLPchguserfuncobject(XSLPprob Prob, int Entity, void **Address);
Arguments
Prob 
The current SLP problem.
Entity 
An integer indicating which object is to be defined. The value is interpreted as follows:
0 
The Global Function Object;
n > 0 
The User Function Object for user function number n;
n < 0 
The Instance Function Object for user function instance number -n.
Address 
The address of a pointer to the object. If Address is NULL, then any setting of the user function object is left unaltered.
Example
The following example sets the Global Function Object. It then sets the User Function Object for the function ProfitCalcs. 
double *GlobObj;
void *ProfitObj;
int iUF;

XSLPchguserfuncobject(Prob, 0, &GlobObj);

if (!XSLPgetindex(Prob, XSLP_USERFUNCNAMESNOCASE,
             "ProfitCalcs", &iUF)) {
  XSLPchguserfuncobject(Prob, iUF, &ProfitObj);
}
The function objects can be of any type. The index of the user function is obtained using the case-insensitive search for names. If the name is not found, XSLPgetindex returns a nonzero value.
Further information
As instance numbers are not normally meaningful, this function should only be used with a negative value of n to reset all Instance Function Objects to NULL when a model is being re-optimized within the same program execution.
Related topics
XSLPchgfuncobject, XSLPsetfuncobject, XSLPsetuserfuncobject

Parent Topic Library functions

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