upstream/1.1.0_cvsrelease/1.1.0_cvs

1 files changed, 275 insertions, 0 deletions

diff --git a/gnu/usr.bin/cc/libobjc/init.c b/gnu/usr.bin/cc/libobjc/init.c
new file mode 100644
index 000000000000..220d7d23e648
--- /dev/null
+++ b/gnu/usr.bin/cc/libobjc/init.c
@@ -0,0 +1,275 @@
+/* GNU Objective C Runtime initialization 
+   Copyright (C) 1993 Free Software Foundation, Inc.
+
+Author: Kresten Krab Thorup
+
+This file is part of GNU CC.
+
+GNU CC 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.
+
+GNU CC 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
+   GNU CC; see the file COPYING.  If not, write to the Free Software
+   Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* As a special exception, if you link this library with files compiled with
+   GCC to produce an executable, this does not cause the resulting executable
+   to be covered by the GNU General Public License. This exception does not
+   however invalidate any other reasons why the executable file might be
+   covered by the GNU General Public License.  */
+
+#include "runtime.h"
+
+/* The version number of this runtime.  This must match the number 
+   defined in gcc (objc-act.c) */
+#define OBJC_VERSION 5
+#define PROTOCOL_VERSION 2
+
+/* This list contains all modules currently loaded into the runtime */
+static struct objc_list* __objc_module_list = 0;
+
+/* This list contains all proto_list's not yet assigned class links */
+static struct objc_list* unclaimed_proto_list = 0;
+
+/* Check compiler vs runtime version */
+static void init_check_module_version(Module_t);
+
+/* Assign isa links to protos */
+static void __objc_init_protocols (struct objc_protocol_list* protos);
+
+/* Add protocol to class */
+static void __objc_class_add_protocols (Class*, struct objc_protocol_list*);
+
+/* Is all categories/classes resolved? */
+BOOL __objc_dangling_categories = NO;
+
+/* This function is called by constructor functions generated for each
+   module compiled.  (_GLOBAL_$I$...) The purpose of this function is to
+   gather the module pointers so that they may be processed by the
+   initialization routines as soon as possible */
+
+void
+__objc_exec_class (Module_t module)
+{
+  /* Has we processed any constructors previously?  This flag used to 
+     indicate that some global data structures need to be built.  */ 
+  static BOOL previous_constructors = 0;
+
+  static struct objc_list* unclaimed_categories = 0;
+
+  /* The symbol table (defined in objc.h) generated by gcc */
+  Symtab_t symtab = module->symtab;
+
+  /* Entry used to traverse hash lists */
+  struct objc_list** cell;
+
+  /* The table of selector references for this module */
+  SEL *selectors = symtab->refs; 
+
+  /* dummy counter */
+  int i;
+
+  DEBUG_PRINTF ("received module: %s\n", module->name);
+  /* check gcc version */
+  init_check_module_version(module);
+
+  /* On the first call of this routine, initialize some data structures.  */
+  if (!previous_constructors)
+    {
+      __objc_init_selector_tables();
+      __objc_init_class_tables();
+      __objc_init_dispatch_tables();
+      previous_constructors = 1;
+    }
+
+  /* Save the module pointer for later processing. (not currently used) */
+  __objc_module_list = list_cons(module, __objc_module_list);
+
+  /* Parse the classes in the load module and gather selector information.  */
+  DEBUG_PRINTF ("gathering selectors from module: %s\n", module->name);
+  for (i = 0; i < symtab->cls_def_cnt; ++i)
+    {
+      Class* class = (Class*) symtab->defs[i];
+
+      /* Make sure we have what we think.  */
+      assert (CLS_ISCLASS(class));
+      assert (CLS_ISMETA(class->class_pointer));
+      DEBUG_PRINTF ("phase 1, processing class: %s\n", class->name);
+
+      /* Store the class in the class table and assign class numbers.  */
+      __objc_add_class_to_hash (class);
+
+      /* Register all of the selectors in the class and meta class.  */
+      __objc_register_selectors_from_class (class);
+      __objc_register_selectors_from_class ((Class*) class->class_pointer);
+
+      /* Install the fake dispatch tables */
+      __objc_install_premature_dtable(class);
+      __objc_install_premature_dtable(class->class_pointer);
+
+      if (class->protocols)
+	__objc_init_protocols (class->protocols);
+   }
+
+  /* Replace referenced selectors from names to SEL's.  */
+  if (selectors)
+    {
+      for (i = 0; selectors[i]; ++i)
+	selectors[i] = sel_register_name ((const char *) selectors[i]);
+    }
+
+  /* Process category information from the module.  */
+  for (i = 0; i < symtab->cat_def_cnt; ++i)
+    {
+      Category_t category = symtab->defs[i + symtab->cls_def_cnt];
+      Class* class = objc_lookup_class (category->class_name);
+      
+      /* If the class for the category exists then append its methods.  */
+      if (class)
+	{
+
+	  DEBUG_PRINTF ("processing categories from (module,object): %s, %s\n",
+			module->name,
+			class->name);
+
+	  /* Do instance methods.  */
+	  if (category->instance_methods)
+	    class_add_method_list (class, category->instance_methods);
+
+	  /* Do class methods.  */
+	  if (category->class_methods)
+	    class_add_method_list ((Class*) class->class_pointer, 
+				   category->class_methods);
+
+	  if (category->protocols)
+	    {
+	      __objc_init_protocols (category->protocols);
+	      __objc_class_add_protocols (class, category->protocols);
+	    }
+
+	}
+      else
+	{
+	  /* The object to which the category methods belong can't be found.
+	     Save the information.  */
+	  unclaimed_categories = list_cons(category, unclaimed_categories);
+	}
+    }
+
+  /* Scan the unclaimed category hash.  Attempt to attach any unclaimed
+     categories to objects.  */
+  for (cell = &unclaimed_categories;
+       *cell;
+       *cell && ((cell = &(*cell)->tail)))
+    {
+      Category_t category = (*cell)->head;
+      Class* class = objc_lookup_class (category->class_name);
+      
+      if (class)
+	{
+	  DEBUG_PRINTF ("attaching stored categories to object: %s\n",
+			class->name);
+	  
+	  list_remove_head (cell);
+	  
+	  if (category->instance_methods)
+	    class_add_method_list (class, category->instance_methods);
+	  
+	  if (category->class_methods)
+	    class_add_method_list ((Class*) class->class_pointer,
+				   category->class_methods);
+	  
+	  if (category->protocols)
+	    {
+	      __objc_init_protocols (category->protocols);
+	      __objc_class_add_protocols (class, category->protocols);
+	    }
+	  
+	}
+    }
+  
+  if (unclaimed_proto_list && objc_lookup_class ("Protocol"))
+    {
+      list_mapcar (unclaimed_proto_list,(void(*)(void*))__objc_init_protocols);
+      list_free (unclaimed_proto_list);
+      unclaimed_proto_list = 0;
+    }
+
+}
+
+/* Sanity check the version of gcc used to compile `module'*/
+static void init_check_module_version(Module_t module)
+{
+  if ((module->version != OBJC_VERSION) || (module->size != sizeof (Module)))
+    {
+      fprintf (stderr, "Module %s version %d doesn't match runtime %d\n",
+	       module->name, module->version, OBJC_VERSION);
+      if(module->version > OBJC_VERSION)
+	fprintf (stderr, "Runtime (libobjc.a) is out of date\n");
+      else if (module->version < OBJC_VERSION)
+	fprintf (stderr, "Compiler (gcc) is out of date\n");
+      else
+	fprintf (stderr, "Objective C internal error -- bad Module size\n");
+      abort ();
+    }
+}
+
+static void
+__objc_init_protocols (struct objc_protocol_list* protos)
+{
+  int i;
+  static Class* proto_class = 0;
+
+  if (! protos)
+    return;
+
+  if (!proto_class)
+    proto_class = objc_lookup_class("Protocol");
+
+  if (!proto_class)
+    {
+      unclaimed_proto_list = list_cons (protos, unclaimed_proto_list);
+      return;
+    }
+
+  assert (protos->next == 0);	/* only single ones allowed */
+
+  for(i = 0; i < protos->count; i++)
+    {
+      struct objc_protocol* aProto = protos->list[i];
+      if (((size_t)aProto->class_pointer) == PROTOCOL_VERSION)
+	{
+	  /* assign class pointer */
+	  aProto->class_pointer = proto_class;
+
+	  /* init super protocols */
+	  __objc_init_protocols (aProto->protocol_list);
+	}
+      else if (protos->list[i]->class_pointer != proto_class)
+	{
+	  fprintf (stderr,
+		   "Version %d doesn't match runtime protocol version %d\n",
+		   ((size_t)protos->list[i]->class_pointer),
+		   PROTOCOL_VERSION);
+	  abort ();
+	}
+    }
+}
+
+static void __objc_class_add_protocols (Class* class,
+					struct objc_protocol_list* protos)
+{
+  /* Well... */
+  if (! protos)
+    return;
+
+  /* Add it... */
+  protos->next = class->protocols;
+  class->protocols = protos;
+}