X-Git-Url: http://git.hcoop.net/bpt/guile.git/blobdiff_plain/82892beda5c053715bc3ec7063af4a129f52c5f9..53befeb700c31dec58cec2c8f6f34535541a2f39:/libguile/gsubr.c

diff --git a/libguile/gsubr.c b/libguile/gsubr.c
dissimilarity index 87%
index f755f8fe7..0fee71a2c 100644
--- a/libguile/gsubr.c
+++ b/libguile/gsubr.c
@@ -1,193 +1,356 @@
-/*	Copyright (C) 1995,1996 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
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this software; see the file COPYING.  If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307 USA
- *
- * As a special exception, the Free Software Foundation gives permission
- * for additional uses of the text contained in its release of GUILE.
- *
- * The exception is that, if you link the GUILE library with other files
- * to produce an executable, this does not by itself cause the
- * resulting executable to be covered by the GNU General Public License.
- * Your use of that executable is in no way restricted on account of
- * linking the GUILE library code into it.
- *
- * This exception does not however invalidate any other reasons why
- * the executable file might be covered by the GNU General Public License.
- *
- * This exception applies only to the code released by the
- * Free Software Foundation under the name GUILE.  If you copy
- * code from other Free Software Foundation releases into a copy of
- * GUILE, as the General Public License permits, the exception does
- * not apply to the code that you add in this way.  To avoid misleading
- * anyone as to the status of such modified files, you must delete
- * this exception notice from them.
- *
- * 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.  */
-
-
-#include <stdio.h>
-#include "_scm.h"
-#include "genio.h"
-#include "procprop.h"
-
-#include "gsubr.h"
-
-/*
- * gsubr.c
- * Provide `gsubrs' -- subrs taking a prescribed number of required, optional,
- * and rest arguments.
- */
-
-#include "gsubr.h"
-
-#define GSUBR_TEST 1
-
-#define GSUBR_MAKTYPE(req, opt, rst) ((req)|((opt)<<4)|((rst)<<8))
-#define GSUBR_REQ(x) ((int)(x)&0xf)
-#define GSUBR_OPT(x) (((int)(x)&0xf0)>>4)
-#define GSUBR_REST(x) ((int)(x)>>8)
-
-#define GSUBR_MAX 10
-#define GSUBR_TYPE(cclo) (SCM_VELTS(cclo)[1])
-#define GSUBR_PROC(cclo) (SCM_VELTS(cclo)[2])
-
-SCM scm_i_name;
-static SCM f_gsubr_apply;
-
-SCM
-scm_make_gsubr(name, req, opt, rst, fcn)
-     char *name;
-     int req;
-     int opt;
-     int rst;
-     SCM (*fcn)();
-{
-  switch GSUBR_MAKTYPE(req, opt, rst) {
-  case GSUBR_MAKTYPE(0, 0, 0): return scm_make_subr(name, scm_tc7_subr_0, fcn);
-  case GSUBR_MAKTYPE(1, 0, 0): return scm_make_subr(name, scm_tc7_subr_1, fcn);
-  case GSUBR_MAKTYPE(0, 1, 0): return scm_make_subr(name, scm_tc7_subr_1o, fcn);
-  case GSUBR_MAKTYPE(1, 1, 0): return scm_make_subr(name, scm_tc7_subr_2o, fcn);
-  case GSUBR_MAKTYPE(2, 0, 0): return scm_make_subr(name, scm_tc7_subr_2, fcn);
-  case GSUBR_MAKTYPE(3, 0, 0): return scm_make_subr(name, scm_tc7_subr_3, fcn);
-  case GSUBR_MAKTYPE(0, 0, 1): return scm_make_subr(name, scm_tc7_lsubr, fcn);
-  case GSUBR_MAKTYPE(2, 0, 1): return scm_make_subr(name, scm_tc7_lsubr_2, fcn);
-  default:
-    {
-      SCM symcell = scm_sysintern(name, SCM_UNDEFINED);
-      SCM z, cclo = scm_makcclo(f_gsubr_apply, 3L);
-      long tmp = ((((SCM_CELLPTR)(SCM_CAR(symcell)))-scm_heap_org)<<8);
-      if (GSUBR_MAX < req + opt + rst) {
-	fputs("ERROR in scm_make_gsubr: too many args\n", stderr);
-	exit (1);
-      }
-      if ((tmp>>8) != ((SCM_CELLPTR)(SCM_CAR(symcell))-scm_heap_org))
-	tmp = 0;
-      SCM_NEWCELL(z);
-      SCM_SUBRF(z) = fcn;
-      SCM_SETCAR (z, tmp + scm_tc7_subr_0);
-      GSUBR_PROC(cclo) = z;
-      GSUBR_TYPE(cclo) = SCM_MAKINUM(GSUBR_MAKTYPE(req, opt, rst));
-      SCM_SETCDR (symcell, cclo);
-#ifdef DEBUG_EXTENSIONS
-      if (SCM_REC_PROCNAMES_P)
-	scm_set_procedure_property_x (cclo, scm_i_name, SCM_CAR (symcell));
-#endif
-      return cclo;
-    }
-  }
-}
-
-
-SCM_PROC(s_gsubr_apply, "gsubr-apply", 0, 0, 1, scm_gsubr_apply);
-
-SCM
-scm_gsubr_apply(args)
-     SCM args;
-{
-  SCM self = SCM_CAR(args);
-  SCM (*fcn)() = SCM_SUBRF(GSUBR_PROC(self));
-  SCM v[10];			/* must agree with greatest supported arity */
-  int typ = SCM_INUM(GSUBR_TYPE(self));
-  int i, n = GSUBR_REQ(typ) + GSUBR_OPT(typ) + GSUBR_REST(typ);
-  args = SCM_CDR(args);
-  for (i = 0; i < GSUBR_REQ(typ); i++) {
-#ifndef RECKLESS
-    if (SCM_IMP(args))
-      scm_wrong_num_args (SCM_SNAME(GSUBR_PROC(self)));
-#endif
-    v[i] = SCM_CAR(args);
-    args = SCM_CDR(args);
-  }
-  for (; i < GSUBR_REQ(typ) + GSUBR_OPT(typ); i++) {
-    if (SCM_NIMP(args)) {
-      v[i] = SCM_CAR(args);
-      args = SCM_CDR(args);
-    }
-    else
-      v[i] = SCM_UNDEFINED;
-  }
-  if (GSUBR_REST(typ))
-    v[i] = args;
-  switch (n) {
-  default: scm_wta(self, "internal programming error", s_gsubr_apply);
-  case 2: return (*fcn)(v[0], v[1]);
-  case 3: return (*fcn)(v[0], v[1], v[2]);
-  case 4: return (*fcn)(v[0], v[1], v[2], v[3]);
-  case 5: return (*fcn)(v[0], v[1], v[2], v[3], v[4]);
-  case 6: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5]);
-  case 7: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6]);
-  case 8: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7]);
-  case 9: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7], v[8]);
-  case 10: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7], v[8], v[9]);
-  }
-}
-
-
-#ifdef GSUBR_TEST
-/* A silly example, taking 2 required args, 1 optional, and
-   a scm_list of rest args 
-   */
-SCM
-gsubr_21l(req1, req2, opt, rst)
-     SCM req1, req2, opt, rst;
-{
-  scm_gen_puts (scm_regular_string, "gsubr-2-1-l:\n req1: ", scm_cur_outp);
-  scm_display(req1, scm_cur_outp);
-  scm_gen_puts (scm_regular_string, "\n req2: ", scm_cur_outp);
-  scm_display(req2, scm_cur_outp);
-  scm_gen_puts (scm_regular_string, "\n opt: ", scm_cur_outp);
-  scm_display(opt, scm_cur_outp);
-  scm_gen_puts (scm_regular_string, "\n rest: ", scm_cur_outp);
-  scm_display(rst, scm_cur_outp);
-  scm_newline(scm_cur_outp);
-  return SCM_UNSPECIFIED;
-}
-#endif
-
-
-
-void
-scm_init_gsubr()
-{
-  f_gsubr_apply = scm_make_subr(s_gsubr_apply, scm_tc7_lsubr, scm_gsubr_apply);
-  scm_i_name = SCM_CAR (scm_sysintern ("name", SCM_UNDEFINED));
-  scm_permanent_object (scm_i_name);
-#ifdef GSUBR_TEST
-  scm_make_gsubr("gsubr-2-1-l", 2, 1, 1, gsubr_21l); /* example */
-#endif
-}
+/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2006, 2008, 2009 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <alloca.h>
+
+#include <stdio.h>
+#include <stdarg.h>
+
+#include "libguile/_scm.h"
+#include "libguile/procprop.h"
+#include "libguile/root.h"
+
+#include "libguile/gsubr.h"
+#include "libguile/deprecation.h"
+
+#include "libguile/private-options.h"
+
+/*
+ * gsubr.c
+ * Provide `gsubrs' -- subrs taking a prescribed number of required, optional,
+ * and rest arguments.
+ */
+
+/* #define GSUBR_TEST */
+
+SCM_GLOBAL_SYMBOL (scm_sym_name, "name");
+
+static SCM
+create_gsubr (int define, const char *name,
+	      unsigned int req, unsigned int opt, unsigned int rst,
+	      SCM (*fcn) ())
+{
+  SCM subr;
+
+  switch (SCM_GSUBR_MAKTYPE (req, opt, rst))
+    {
+    case SCM_GSUBR_MAKTYPE(0, 0, 0):
+      subr = scm_c_make_subr (name, scm_tc7_subr_0, fcn);
+      break;
+    case SCM_GSUBR_MAKTYPE(1, 0, 0):
+      subr = scm_c_make_subr (name, scm_tc7_subr_1, fcn);
+      break;
+    case SCM_GSUBR_MAKTYPE(0, 1, 0):
+      subr = scm_c_make_subr (name, scm_tc7_subr_1o, fcn);
+      break;
+    case SCM_GSUBR_MAKTYPE(1, 1, 0):
+      subr = scm_c_make_subr (name, scm_tc7_subr_2o, fcn);
+      break;
+    case SCM_GSUBR_MAKTYPE(2, 0, 0):
+      subr = scm_c_make_subr (name, scm_tc7_subr_2, fcn);
+      break;
+    case SCM_GSUBR_MAKTYPE(3, 0, 0):
+      subr = scm_c_make_subr (name, scm_tc7_subr_3, fcn);
+      break;
+    case SCM_GSUBR_MAKTYPE(0, 0, 1):
+      subr = scm_c_make_subr (name, scm_tc7_lsubr, fcn);
+      break;
+    case SCM_GSUBR_MAKTYPE(2, 0, 1):
+      subr = scm_c_make_subr (name, scm_tc7_lsubr_2, fcn);
+      break;
+    default:
+      {
+	unsigned type;
+
+	type = SCM_GSUBR_MAKTYPE (req, opt, rst);
+	if (SCM_GSUBR_REQ (type) != req
+	    || SCM_GSUBR_OPT (type) != opt
+	    || SCM_GSUBR_REST (type) != rst)
+	  scm_out_of_range ("create_gsubr", scm_from_uint (req + opt + rst));
+
+	subr = scm_c_make_subr (name, scm_tc7_gsubr | (type << 8U),
+				fcn);
+      }
+    }
+
+  if (define)
+    scm_define (SCM_SNAME (subr), subr);
+
+  return subr;
+}
+
+SCM
+scm_c_make_gsubr (const char *name, int req, int opt, int rst, SCM (*fcn)())
+{
+  return create_gsubr (0, name, req, opt, rst, fcn);
+}
+
+SCM
+scm_c_define_gsubr (const char *name, int req, int opt, int rst, SCM (*fcn)())
+{
+  return create_gsubr (1, name, req, opt, rst, fcn);
+}
+
+static SCM
+create_gsubr_with_generic (int define,
+			   const char *name,
+			   int req,
+			   int opt,
+			   int rst,
+			   SCM (*fcn)(),
+			   SCM *gf)
+{
+  SCM subr;
+
+  switch (SCM_GSUBR_MAKTYPE(req, opt, rst))
+    {
+    case SCM_GSUBR_MAKTYPE(0, 0, 0):
+      subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_0, fcn, gf);
+      goto create_subr;
+    case SCM_GSUBR_MAKTYPE(1, 0, 0):
+      subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_1, fcn, gf);
+      goto create_subr;
+    case SCM_GSUBR_MAKTYPE(0, 1, 0):
+      subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_1o, fcn, gf);
+      goto create_subr;
+    case SCM_GSUBR_MAKTYPE(1, 1, 0):
+      subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_2o, fcn, gf);
+      goto create_subr;
+    case SCM_GSUBR_MAKTYPE(2, 0, 0):
+      subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_2, fcn, gf);
+      goto create_subr;
+    case SCM_GSUBR_MAKTYPE(3, 0, 0):
+      subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_3, fcn, gf);
+      goto create_subr;
+    case SCM_GSUBR_MAKTYPE(0, 0, 1):
+      subr = scm_c_make_subr_with_generic (name, scm_tc7_lsubr, fcn, gf);
+      goto create_subr;
+    case SCM_GSUBR_MAKTYPE(2, 0, 1):
+      subr = scm_c_make_subr_with_generic (name, scm_tc7_lsubr_2, fcn, gf);
+    create_subr:
+      if (define)
+	scm_define (SCM_SNAME (subr), subr);
+      return subr;
+    default:
+      ;
+    }
+  scm_misc_error ("scm_c_make_gsubr_with_generic",
+		  "can't make primitive-generic with this arity",
+		  SCM_EOL);
+  return SCM_BOOL_F; /* never reached */
+}
+
+SCM
+scm_c_make_gsubr_with_generic (const char *name,
+			       int req,
+			       int opt,
+			       int rst,
+			       SCM (*fcn)(),
+			       SCM *gf)
+{
+  return create_gsubr_with_generic (0, name, req, opt, rst, fcn, gf);
+}
+
+SCM
+scm_c_define_gsubr_with_generic (const char *name,
+				 int req,
+				 int opt,
+				 int rst,
+				 SCM (*fcn)(),
+				 SCM *gf)
+{
+  return create_gsubr_with_generic (1, name, req, opt, rst, fcn, gf);
+}
+
+/* Apply PROC, a gsubr, to the ARGC arguments in ARGV.  ARGC is expected to
+   match the number of arguments of the underlying C function.  */
+static SCM
+gsubr_apply_raw (SCM proc, unsigned int argc, const SCM *argv)
+{
+  SCM (*fcn) ();
+  unsigned int type, argc_max;
+
+  type = SCM_GSUBR_TYPE (proc);
+  argc_max = SCM_GSUBR_REQ (type) + SCM_GSUBR_OPT (type)
+    + SCM_GSUBR_REST (type);
+
+  if (SCM_UNLIKELY (argc != argc_max))
+    /* We expect the exact argument count.  */
+    scm_wrong_num_args (SCM_SNAME (proc));
+
+  fcn = SCM_SUBRF (proc);
+
+  switch (argc)
+    {
+    case 0:
+      return (*fcn) ();
+    case 1:
+      return (*fcn) (argv[0]);
+    case 2:
+      return (*fcn) (argv[0], argv[1]);
+    case 3:
+      return (*fcn) (argv[0], argv[1], argv[2]);
+    case 4:
+      return (*fcn) (argv[0], argv[1], argv[2], argv[3]);
+    case 5:
+      return (*fcn) (argv[0], argv[1], argv[2], argv[3], argv[4]);
+    case 6:
+      return (*fcn) (argv[0], argv[1], argv[2], argv[3], argv[4], argv[5]);
+    case 7:
+      return (*fcn) (argv[0], argv[1], argv[2], argv[3], argv[4], argv[5],
+		     argv[6]);
+    case 8:
+      return (*fcn) (argv[0], argv[1], argv[2], argv[3], argv[4], argv[5],
+		     argv[6], argv[7]);
+    case 9:
+      return (*fcn) (argv[0], argv[1], argv[2], argv[3], argv[4], argv[5],
+		     argv[6], argv[7], argv[8]);
+    case 10:
+      return (*fcn) (argv[0], argv[1], argv[2], argv[3], argv[4], argv[5],
+		     argv[6], argv[7], argv[8], argv[9]);
+    default:
+      scm_misc_error ((char *) SCM_SNAME (proc),
+		      "gsubr invocation with more than 10 arguments not implemented",
+		      SCM_EOL);
+    }
+
+  return SCM_BOOL_F; /* Never reached. */
+}
+
+/* Apply PROC, a gsubr, to the given arguments.  Missing optional arguments
+   are added, and rest arguments are turned into a list.  */
+SCM
+scm_i_gsubr_apply (SCM proc, SCM arg, ...)
+{
+  unsigned int type, argc, argc_max;
+  SCM *argv;
+  va_list arg_list;
+
+  type = SCM_GSUBR_TYPE (proc);
+  argc_max = SCM_GSUBR_REQ (type) + SCM_GSUBR_OPT (type);
+  argv = alloca ((argc_max + SCM_GSUBR_REST (type)) * sizeof (*argv));
+
+  va_start (arg_list, arg);
+
+  for (argc = 0;
+       !SCM_UNBNDP (arg) && argc < argc_max;
+       argc++, arg = va_arg (arg_list, SCM))
+    argv[argc] = arg;
+
+  if (SCM_UNLIKELY (argc < SCM_GSUBR_REQ (type)))
+    scm_wrong_num_args (SCM_SNAME (proc));
+
+  /* Fill in optional arguments that were not passed.  */
+  while (argc < argc_max)
+    argv[argc++] = SCM_UNDEFINED;
+
+  if (SCM_GSUBR_REST (type))
+    {
+      /* Accumulate rest arguments in a list.  */
+      SCM *rest_loc;
+
+      argv[argc_max] = SCM_EOL;
+
+      for (rest_loc = &argv[argc_max];
+	   !SCM_UNBNDP (arg);
+	   rest_loc = SCM_CDRLOC (*rest_loc), arg = va_arg (arg_list, SCM))
+	*rest_loc = scm_cons (arg, SCM_EOL);
+
+      argc = argc_max + 1;
+    }
+
+  va_end (arg_list);
+
+  return gsubr_apply_raw (proc, argc, argv);
+}
+
+/* Apply SELF, a gsubr, to the arguments listed in ARGS.  Missing optional
+   arguments are added, and rest arguments are kept into a list.  */
+SCM
+scm_i_gsubr_apply_list (SCM self, SCM args)
+#define FUNC_NAME "scm_i_gsubr_apply"
+{
+  SCM v[SCM_GSUBR_MAX];
+  unsigned int typ = SCM_GSUBR_TYPE (self);
+  long i, n = SCM_GSUBR_REQ (typ) + SCM_GSUBR_OPT (typ) + SCM_GSUBR_REST (typ);
+
+  for (i = 0; i < SCM_GSUBR_REQ (typ); i++) {
+    if (scm_is_null (args))
+      scm_wrong_num_args (SCM_SNAME (self));
+    v[i] = SCM_CAR(args);
+    args = SCM_CDR(args);
+  }
+  for (; i < SCM_GSUBR_REQ (typ) + SCM_GSUBR_OPT (typ); i++) {
+    if (SCM_NIMP (args)) {
+      v[i] = SCM_CAR (args);
+      args = SCM_CDR(args);
+    }
+    else
+      v[i] = SCM_UNDEFINED;
+  }
+  if (SCM_GSUBR_REST(typ))
+    v[i] = args;
+  else if (!scm_is_null (args))
+    scm_wrong_num_args (SCM_SNAME (self));
+
+  return gsubr_apply_raw (self, n, v);
+}
+#undef FUNC_NAME
+
+
+#ifdef GSUBR_TEST
+/* A silly example, taking 2 required args, 1 optional, and
+   a scm_list of rest args
+   */
+SCM
+gsubr_21l(SCM req1, SCM req2, SCM opt, SCM rst)
+{
+  scm_puts ("gsubr-2-1-l:\n req1: ", scm_cur_outp);
+  scm_display(req1, scm_cur_outp);
+  scm_puts ("\n req2: ", scm_cur_outp);
+  scm_display(req2, scm_cur_outp);
+  scm_puts ("\n opt: ", scm_cur_outp);
+  scm_display(opt, scm_cur_outp);
+  scm_puts ("\n rest: ", scm_cur_outp);
+  scm_display(rst, scm_cur_outp);
+  scm_newline(scm_cur_outp);
+  return SCM_UNSPECIFIED;
+}
+#endif
+
+
+void
+scm_init_gsubr()
+{
+#ifdef GSUBR_TEST
+  scm_c_define_gsubr ("gsubr-2-1-l", 2, 1, 1, gsubr_21l); /* example */
+#endif
+
+#include "libguile/gsubr.x"
+}
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/