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FindOpt
C gateway function find the position of an optional argument given its name
Calling Sequence
Pos FindOpt(varname, opts)
Arguments
- varname
the name of the optional parameter
- opts
a C list of optional parameters
typedef struct rhs_opts__ { int position ; // stack position : -1 if not present char *name; // the name of the variable char *type; // a Scilab type (like "d") representing the type of the variable int m,n; // the size of the variable unsigned long int l; // a pointer to the Scilab stack } rhs_opts;
- Pos
the rank of the optional parameter if it has been found in the parameters sent to the C function, 0 otherwise.
Description
A C gateway function which find the position of an optional argument given its name. You must include stack-c.h to benefit from this function.
WARNING: This API is deprecated from Scilab 5.2.0 and is going to be removed with Scilab 6.0. Please use API Scilab (the new Scilab API).
Examples
A more complete example is available in the directory SCI/modules/core/example/optional_parameters.
#include <stack-c.h> int sci_optional_parameters(char * fname) { int m1,n1,l1; // optional names must be stored in alphabetical order in opts static rhs_opts opts[]= {{-1,"v1","d",0,0,0}, {-1,"v2","d",0,0,0}, {-1,NULL,NULL,0,0}}; int minrhs = 1, maxrhs = 1; int minlhs = 1, maxlhs = 3; int nopt, iopos, res; char buffer_name[csiz]; // csiz used for character coding nopt = NumOpt(); CheckRhs(minrhs,maxrhs+nopt); CheckLhs(minlhs,maxlhs); // first non optional argument GetRhsVar( 1, "c", &m1, &n1, &l1); if (get_optionals(fname,opts)==0) return 0; sciprint("number of optional parameters = %d\n", NumOpt()); sciprint("first optional parameters = %d\n", FirstOpt()); sciprint("FindOpt(v1) = %d\n", FindOpt("v1", opts)); sciprint("FindOpt(v2) = %d\n", FindOpt("v2", opts)); if (IsOpt(1,buffer_name)) sciprint("parameter 1 is optional: %s\n", buffer_name); if (IsOpt(2,buffer_name)) sciprint("parameter 2 is optional: %s\n", buffer_name); if (IsOpt(3,buffer_name)) sciprint("parameter 3 is optional: %s\n", buffer_name); return 0; }
See Also
| << CreateVar | Scilab Gateway API | FirstOpt >> |