Documentation


GRBgetattrinfo

int GRBgetattrinfo ( GRBmodel *model,
    const char *attrname,
    int *datatypeP,
    int *attrtypeP,
    int *settableP )

Obtain information about an attribute.

Return value:

A non-zero return value indicates that a problem occurred while obtaining information about the attribute. Refer to the Error Code table for a list of possible return values. Details on the error can be obtained by calling GRBgeterrormsg.

Arguments:

model: A loaded optimization model, typically created by routine GRBnewmodel or GRBreadmodel.

attrname: The name of an attribute. Available attributes are listed and described in the Attributes section of this document.

datatypeP: On completion, the integer pointed to by this argument will indicate the data type of the attribute. Possible types are char (0), int (1), double (2), or string(3). This argument can be NULL.

attrtypeP: On completion, the integer pointed to by this argument will indicate the type of the attribute. Possible types are model attribute (0), variable attribute (1), linear constraint attribute (2), (3) SOS constraint attribute, (4) quadratic constraint attribute, or (5) general constraint attribute. This argument can be NULL.

settableP: On completion, the integer pointed to by this argument will indicate whether the attribute can be set (1) or not (0). This argument can be NULL.

Example usage:

  int datatype, attrtype, settable;
  error = GRBgetattrinfo(model, "ModelName", &datatype, &attrtype, &settable);