These functions can be used in external code with OpenMaple or define_external.

The ToMaple* functions create Maple objects. The parameter types and return values are defined in the supplied header files.

ToMapleBoolean is three valued. When b is zero, it returns the Maple false object. If b is -1, it returns the Maple FAIL object. If b is non-zero (and not -1), it returns the Maple true object.

ToMapleChar returns a single character Maple string object.

ToMapleComplex converts the pair of hardware floats, re and im to the Maple expression, , and returns this object. ToMapleComplexFloat converts a pair of Maple software float objects to the same structure.

ToMapleExpressionSequence creates and returns a Maple expression sequence and fills it with the n Maple objects, arg1, arg2, ..., argN.

NewMapleExpressionSequence creates and returns a Maple expression sequence with space for n Maple objects.  The returned object can be filled in by assigning directly to the returned object as if it were an array.  For example,  creates an expression sequence with space for two objects.  It can be filled in by assigning .   Note that the first element is located at , not .   Once filled in, an expression sequence must not be changed.  Also, never change an expression sequence that was not created by a call to NewMapleExpressionSequence. For an explanation of why some objects are not mutable, see MapleUnique.

ToMapleFunction creates and returns a Maple function object of the form fname( arg1, arg2, ..., argN).

ToMapleName returns a Maple NAME dag with the name str. If is_global is set to TRUE (1), the name is global in the Maple name space. Otherwise, if is_global is FALSE (0), the name is a unique exported local variable.

ToMapleNULL returns the Maple NULL object.

ToMapleNULLPointer returns the Maple zero integer object. This is the WRAPPER representation of a NULL pointer passed to a procedure. This is not to be confused with the value returned by ToMapleNULL.  It is also not related to a MaplePointer object.

ToMaplePointer creates a MaplePointer object. The p parameter is generally a data pointer. The i parameter is a unique integer identifier for your pointer data.  It can be retrieved by calling MaplePointerType.

ToMapleRelation forms the relation lhs rel rhs, where rel is one of "=", "<", ">", "and", "implies", "not", "or", and, "xor".

ToMapleString copies the character string, str to a Maple STRING object and returns it. When using the Fortran API the length of the given string must also be passed.

Other functions exist for creating Maple Array objects, list objects, and table objects. For more information, see RTableCreate, MapleListAlloc, and MapleTableAlloc.