-/* Copyright (C) 1995,1996 Free Software Foundation, Inc.
+/* Copyright (C) 1995,1996,1998, 2000 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* If you write modifications of your own for GUILE, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice. */
+
+/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
+ gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
+
\f
#include <stdio.h>
-#include "_scm.h"
-#include "alist.h"
-#include "eval.h"
+#include "libguile/_scm.h"
+
+#include "libguile/alist.h"
+#include "libguile/eval.h"
+#include "libguile/procs.h"
+#include "libguile/gsubr.h"
+#include "libguile/objects.h"
+#include "libguile/smob.h"
+#include "libguile/root.h"
+#include "libguile/vectors.h"
-#include "procprop.h"
+#include "libguile/validate.h"
+#include "libguile/procprop.h"
\f
+SCM_GLOBAL_SYMBOL (scm_sym_system_procedure, "system-procedure");
+SCM_GLOBAL_SYMBOL (scm_sym_arity, "arity");
+
+SCM
+scm_i_procedure_arity (SCM proc)
+{
+ int a = 0, o = 0, r = 0;
+ if (SCM_IMP (proc))
+ return SCM_BOOL_F;
+ loop:
+ switch (SCM_TYP7 (proc))
+ {
+ case scm_tc7_subr_1o:
+ o = 1;
+ case scm_tc7_subr_0:
+ break;
+ case scm_tc7_subr_2o:
+ o = 1;
+ case scm_tc7_subr_1:
+ case scm_tc7_cxr:
+ case scm_tc7_contin:
+ a += 1;
+ break;
+ case scm_tc7_subr_2:
+ a += 2;
+ break;
+ case scm_tc7_subr_3:
+ a += 3;
+ break;
+ case scm_tc7_asubr:
+ case scm_tc7_rpsubr:
+ case scm_tc7_lsubr:
+ r = 1;
+ break;
+ case scm_tc7_lsubr_2:
+ a += 2;
+ r = 1;
+ break;
+ case scm_tc7_smob:
+ {
+ int type;
+ if (!SCM_SMOB_DESCRIPTOR (proc).apply)
+ return SCM_BOOL_F;
+ type = SCM_SMOB_DESCRIPTOR (proc).gsubr_type;
+ goto gsubr_type;
+ case scm_tc7_cclo:
+ if (SCM_EQ_P (SCM_CCLO_SUBR (proc), scm_f_gsubr_apply))
+ {
+ type = SCM_INUM (SCM_GSUBR_TYPE (proc));
+ gsubr_type:
+ a += SCM_GSUBR_REQ (type);
+ o = SCM_GSUBR_OPT (type);
+ r = SCM_GSUBR_REST (type);
+ break;
+ }
+ proc = SCM_CCLO_SUBR (proc);
+ a -= 1;
+ goto loop;
+ }
+ case scm_tc7_pws:
+ proc = SCM_PROCEDURE (proc);
+ goto loop;
+ case scm_tcs_closures:
+ proc = SCM_CAR (SCM_CODE (proc));
+ if (SCM_IMP (proc))
+ break;
+ while (SCM_CONSP (proc))
+ {
+ ++a;
+ proc = SCM_CDR (proc);
+ }
+ if (SCM_NIMP (proc))
+ r = 1;
+ break;
+ case scm_tcs_cons_gloc:
+ if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC)
+ {
+ r = 1;
+ break;
+ }
+ else if (!SCM_I_OPERATORP (proc))
+ return SCM_BOOL_F;
+ proc = (SCM_I_ENTITYP (proc)
+ ? SCM_ENTITY_PROCEDURE (proc)
+ : SCM_OPERATOR_PROCEDURE (proc));
+ a -= 1;
+ goto loop;
+ default:
+ return SCM_BOOL_F;
+ }
+ return SCM_LIST3 (SCM_MAKINUM (a),
+ SCM_MAKINUM (o),
+ SCM_BOOL(r));
+}
+
static SCM
-scm_stand_in_scm_proc(proc)
- SCM proc;
+scm_stand_in_scm_proc(SCM proc)
{
SCM answer;
answer = scm_assoc (proc, scm_stand_in_procs);
- if (answer == SCM_BOOL_F)
+ if (SCM_FALSEP (answer))
{
answer = scm_closure (scm_listify (SCM_EOL, SCM_BOOL_F, SCM_UNDEFINED),
SCM_EOL);
return answer;
}
-SCM_PROC(s_procedure_properties, "procedure-properties", 1, 0, 0, scm_procedure_properties);
-
-SCM
-scm_procedure_properties (proc)
- SCM proc;
+SCM_DEFINE (scm_procedure_properties, "procedure-properties", 1, 0, 0,
+ (SCM proc),
+ "Return @var{obj}'s property list.")
+#define FUNC_NAME s_scm_procedure_properties
{
- SCM_ASSERT (SCM_NFALSEP (scm_procedure_p (proc)),
- proc, SCM_ARG1, s_procedure_properties);
- if (!(SCM_NIMP (proc) && SCM_CLOSUREP (proc)))
- proc = scm_stand_in_scm_proc(proc);
- return SCM_PROCPROPS (proc);
+ SCM_VALIDATE_PROC (1,proc);
+ return scm_acons (scm_sym_arity, scm_i_procedure_arity (proc),
+ SCM_PROCPROPS (SCM_CLOSUREP (proc)
+ ? proc
+ : scm_stand_in_scm_proc (proc)));
}
+#undef FUNC_NAME
-SCM_PROC(s_set_procedure_properties_x, "set-procedure-properties!", 2, 0, 0, scm_set_procedure_properties_x);
-
-SCM
-scm_set_procedure_properties_x (proc, new_val)
- SCM proc;
- SCM new_val;
+SCM_DEFINE (scm_set_procedure_properties_x, "set-procedure-properties!", 2, 0, 0,
+ (SCM proc, SCM new_val),
+ "Set @var{obj}'s property list to @var{alist}.")
+#define FUNC_NAME s_scm_set_procedure_properties_x
{
- if (!(SCM_NIMP (proc) && SCM_CLOSUREP (proc)))
+ if (!SCM_CLOSUREP (proc))
proc = scm_stand_in_scm_proc(proc);
- SCM_ASSERT (SCM_NIMP (proc) && SCM_CLOSUREP (proc), proc, SCM_ARG1, s_set_procedure_properties_x);
+ SCM_VALIDATE_CLOSURE (1,proc);
SCM_SETPROCPROPS (proc, new_val);
return SCM_UNSPECIFIED;
}
+#undef FUNC_NAME
-SCM_PROC(s_procedure_property, "procedure-property", 2, 0, 0, scm_procedure_property);
-
-SCM
-scm_procedure_property (p, k)
- SCM p;
- SCM k;
+SCM_DEFINE (scm_procedure_property, "procedure-property", 2, 0, 0,
+ (SCM p, SCM k),
+ "Return the property of @var{obj} with name @var{key}.")
+#define FUNC_NAME s_scm_procedure_property
{
SCM assoc;
- if (!(SCM_NIMP (p) && SCM_CLOSUREP (p)))
- p = scm_stand_in_scm_proc(p);
- SCM_ASSERT (SCM_NFALSEP (scm_procedure_p (p)),
- p, SCM_ARG1, s_procedure_property);
- assoc = scm_sloppy_assq (k, SCM_PROCPROPS (p));
+ if (SCM_EQ_P (k, scm_sym_arity))
+ {
+ SCM arity;
+ SCM_ASSERT (SCM_NFALSEP (arity = scm_i_procedure_arity (p)),
+ p, SCM_ARG1, FUNC_NAME);
+ return arity;
+ }
+ SCM_VALIDATE_PROC (1,p);
+ assoc = scm_sloppy_assq (k,
+ SCM_PROCPROPS (SCM_CLOSUREP (p)
+ ? p
+ : scm_stand_in_scm_proc (p)));
return (SCM_NIMP (assoc) ? SCM_CDR (assoc) : SCM_BOOL_F);
}
+#undef FUNC_NAME
-SCM_PROC(s_set_procedure_property_x, "set-procedure-property!", 3, 0, 0, scm_set_procedure_property_x);
-
-SCM
-scm_set_procedure_property_x (p, k, v)
- SCM p;
- SCM k;
- SCM v;
+SCM_DEFINE (scm_set_procedure_property_x, "set-procedure-property!", 3, 0, 0,
+ (SCM p, SCM k, SCM v),
+ "In @var{obj}'s property list, set the property named @var{key} to\n"
+ "@var{value}.")
+#define FUNC_NAME s_scm_set_procedure_property_x
{
SCM assoc;
- if (!(SCM_NIMP (p) && SCM_CLOSUREP (p)))
+ if (!SCM_CLOSUREP (p))
p = scm_stand_in_scm_proc(p);
- SCM_ASSERT (SCM_NIMP (p) && SCM_CLOSUREP (p), p, SCM_ARG1, s_set_procedure_property_x);
+ SCM_VALIDATE_CLOSURE (1,p);
+ if (SCM_EQ_P (k, scm_sym_arity))
+ SCM_MISC_ERROR ("arity is a read-only property", SCM_EOL);
assoc = scm_sloppy_assq (k, SCM_PROCPROPS (p));
if (SCM_NIMP (assoc))
SCM_SETCDR (assoc, v);
SCM_SETPROCPROPS (p, scm_acons (k, v, SCM_PROCPROPS (p)));
return SCM_UNSPECIFIED;
}
+#undef FUNC_NAME
\f
void
scm_init_procprop ()
{
-#include "procprop.x"
+#include "libguile/procprop.x"
}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/