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-rw-r--r--libguile/procs.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/libguile/procs.h b/libguile/procs.h
index 469b735d9..7e445ad11 100644
--- a/libguile/procs.h
+++ b/libguile/procs.h
@@ -40,6 +40,46 @@
#define SCM_SET_SUBR_GENERIC(x, g) (*((SCM *) SCM_CELL_WORD_2 (x)) = (g))
#define SCM_SET_SUBR_GENERIC_LOC(x, g) (SCM_SET_CELL_WORD_2 (x, (scm_t_bits) g))
+/* Return the most suitable subr type for a subr with REQ required arguments,
+ OPT optional arguments, and REST (0 or 1) arguments. This has to be in
+ sync with `create_gsubr ()'. */
+#define SCM_SUBR_ARITY_TO_TYPE(req, opt, rest) \
+ ((rest) == 0 \
+ ? ((opt) == 0 \
+ ? ((req) == 0 \
+ ? scm_tc7_subr_0 \
+ : ((req) == 1 \
+ ? scm_tc7_subr_1 \
+ : ((req) == 2 \
+ ? scm_tc7_subr_2 \
+ : ((req) == 3 \
+ ? scm_tc7_subr_3 \
+ : scm_tc7_gsubr \
+ | (SCM_GSUBR_MAKTYPE (req, opt, rest) << 8U))))) \
+ : ((opt) == 1 \
+ ? ((req) == 0 \
+ ? scm_tc7_subr_1o \
+ : ((req) == 1 \
+ ? scm_tc7_subr_2o \
+ : scm_tc7_gsubr | \
+ (SCM_GSUBR_MAKTYPE (req, opt, rest) << 8U))) \
+ : scm_tc7_gsubr | \
+ (SCM_GSUBR_MAKTYPE (req, opt, rest) << 8U))) \
+ : ((rest) == 1 \
+ ? ((opt) == 0 \
+ ? ((req) == 0 \
+ ? scm_tc7_lsubr \
+ : ((req) == 2 \
+ ? scm_tc7_lsubr_2 \
+ : scm_tc7_gsubr \
+ | (SCM_GSUBR_MAKTYPE (req, opt, rest) << 8U))) \
+ : scm_tc7_gsubr \
+ | (SCM_GSUBR_MAKTYPE (req, opt, rest) << 8U)) \
+ : scm_tc7_gsubr \
+ | (SCM_GSUBR_MAKTYPE (req, opt, rest) << 8U)))
+
+
+
/* Closures
*/
@@ -104,6 +144,9 @@
#define SCM_PROCEDURE(obj) SCM_CELL_OBJECT_1 (obj)
#define SCM_SETTER(obj) SCM_CELL_OBJECT_2 (obj)
+
+
+
SCM_API SCM scm_c_make_subr (const char *name, long type, SCM (*fcn)());
SCM_API SCM scm_c_make_subr_with_generic (const char *name, long type,
SCM (*fcn)(), SCM *gf);