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/* pointer-in-out.i --- Guile typemaps for passing -*- c -*- pointers indirectly
Copyright (C) 2001 Matthias Koeppe <mkoeppe@mail.math.uni-magdeburg.de>
$Header$
*/
/* Here is a macro that will define typemaps for passing C pointers indirectly.
TYPEMAP_POINTER_INPUT_OUTPUT(PTRTYPE, SCM_TYPE)
Supported calling conventions (in this example, PTRTYPE is int *):
func(int **INPUT)
Scheme wrapper will take one argument, a wrapped C pointer.
The address of a variable containing this pointer will be
passed to the function.
func(int **OUTPUT)
Scheme wrapper will take no arguments. The address of an int *
variable will be passed to the function. The function is
expected to modify the variable; its value is wrapped and
becomes an extra return value. (See the documentation on how
to deal with multiple values.)
func(int **BOTH)
func(int **INOUT)
This annotation combines INPUT and OUTPUT.
*/
%define TYPEMAP_POINTER_INPUT_OUTPUT(PTRTYPE, SCM_TYPE)
%typemap(in, doc="$NAME is of type <" #SCM_TYPE ">") PTRTYPE *INPUT(PTRTYPE temp)
{
if (SWIG_Guile_GetPtr($input, (void **) &temp, $*descriptor)) {
scm_wrong_type_arg(FUNC_NAME, $argnum, $input);
}
$1 = &temp;
}
%typemap(in, numinputs=0) PTRTYPE *OUTPUT(PTRTYPE temp)
"$1 = &temp;";
%typemap(argout, doc="<" #SCM_TYPE ">") PTRTYPE *OUTPUT
"SWIG_APPEND_VALUE(SWIG_Guile_MakePtr(*$1, $*descriptor));";
%typemap(in) PTRTYPE *BOTH = PTRTYPE *INPUT;
%typemap(argout) PTRTYPE *BOTH = PTRTYPE *OUTPUT;
%typemap(in) PTRTYPE *INOUT = PTRTYPE *INPUT;
%typemap(argout) PTRTYPE *INOUT = PTRTYPE *OUTPUT;
/* As a special convenience measure, also attach docs involving
SCM_TYPE to the standard pointer typemaps */
%typemap(in, doc="$NAME is of type <" #SCM_TYPE ">") PTRTYPE {
if (SWIG_Guile_GetPtr($input, (void **) &$1, $descriptor))
scm_wrong_type_arg(FUNC_NAME, $argnum, $input);
}
%typemap(out, doc="<" #SCM_TYPE ">") PTRTYPE {
$result = SWIG_Guile_MakePtr ($1, $descriptor);
}
%enddef
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