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106 lines
3.4 KiB
106 lines
3.4 KiB
5 years ago
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/* -----------------------------------------------------------------------------
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* See the LICENSE file for information on copyright, usage and redistribution
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* of SWIG, and the README file for authors - http://www.swig.org/release.html.
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*
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* pointer-in-out.i
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*
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* Guile typemaps for passing pointers indirectly
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* ----------------------------------------------------------------------------- */
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/* Here is a macro that will define typemaps for passing C pointers indirectly.
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TYPEMAP_POINTER_INPUT_OUTPUT(PTRTYPE, SCM_TYPE)
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Supported calling conventions (in this example, PTRTYPE is int *):
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func(int **INPUT)
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Scheme wrapper will take one argument, a wrapped C pointer.
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The address of a variable containing this pointer will be
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passed to the function.
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func(int **INPUT_CONSUMED)
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Likewise, but mark the pointer object as not garbage
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collectable.
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func(int **INPUT_DESTROYED)
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Likewise, but mark the pointer object as destroyed.
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func(int **OUTPUT)
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Scheme wrapper will take no arguments. The address of an int *
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variable will be passed to the function. The function is
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expected to modify the variable; its value is wrapped and
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becomes an extra return value. (See the documentation on how
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to deal with multiple values.)
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func(int **OUTPUT_NONCOLLECTABLE)
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Likewise, but make the pointer object not garbage collectable.
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func(int **BOTH)
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func(int **INOUT)
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This annotation combines INPUT and OUTPUT.
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*/
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%define TYPEMAP_POINTER_INPUT_OUTPUT(PTRTYPE, SCM_TYPE)
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%typemap(in, doc="$NAME is of type <" #SCM_TYPE ">") PTRTYPE *INPUT(PTRTYPE temp)
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{
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if (SWIG_ConvertPtr($input, (void **) &temp, $*descriptor, 0)) {
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scm_wrong_type_arg(FUNC_NAME, $argnum, $input);
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}
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$1 = &temp;
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}
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%typemap(in, doc="$NAME is of type <" #SCM_TYPE "> and is consumed by the function") PTRTYPE *INPUT_CONSUMED(PTRTYPE temp)
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{
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if (SWIG_ConvertPtr($input, (void **) &temp, $*descriptor, 0)) {
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scm_wrong_type_arg(FUNC_NAME, $argnum, $input);
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}
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SWIG_Guile_MarkPointerNoncollectable($input);
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$1 = &temp;
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}
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%typemap(in, doc="$NAME is of type <" #SCM_TYPE "> and is consumed by the function") PTRTYPE *INPUT_DESTROYED(PTRTYPE temp)
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{
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if (SWIG_ConvertPtr($input, (void **) &temp, $*descriptor, 0)) {
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scm_wrong_type_arg(FUNC_NAME, $argnum, $input);
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}
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SWIG_Guile_MarkPointerDestroyed($input);
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$1 = &temp;
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}
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%typemap(in, numinputs=0) PTRTYPE *OUTPUT(PTRTYPE temp),
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PTRTYPE *OUTPUT_NONCOLLECTABLE(PTRTYPE temp)
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"$1 = &temp;";
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%typemap(argout, doc="<" #SCM_TYPE ">") PTRTYPE *OUTPUT
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"SWIG_APPEND_VALUE(SWIG_NewPointerObj(*$1, $*descriptor, 1));";
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%typemap(argout, doc="<" #SCM_TYPE ">") PTRTYPE *OUTPUT_NONCOLLECTABLE
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"SWIG_APPEND_VALUE(SWIG_NewPointerObj(*$1, $*descriptor, 0));";
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%typemap(in) PTRTYPE *BOTH = PTRTYPE *INPUT;
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%typemap(argout) PTRTYPE *BOTH = PTRTYPE *OUTPUT;
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%typemap(in) PTRTYPE *INOUT = PTRTYPE *INPUT;
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%typemap(argout) PTRTYPE *INOUT = PTRTYPE *OUTPUT;
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/* As a special convenience measure, also attach docs involving
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SCM_TYPE to the standard pointer typemaps */
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%typemap(in, doc="$NAME is of type <" #SCM_TYPE ">") PTRTYPE {
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if (SWIG_ConvertPtr($input, (void **) &$1, $descriptor, 0))
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scm_wrong_type_arg(FUNC_NAME, $argnum, $input);
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}
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%typemap(out, doc="<" #SCM_TYPE ">") PTRTYPE {
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$result = SWIG_NewPointerObj ($1, $descriptor, $owner);
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}
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%enddef
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