144 lines
4.2 KiB
C
144 lines
4.2 KiB
C
/* GNU Objective C Runtime selector related functions
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Copyright (C) 1993 Free Software Foundation, Inc.
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Author: Kresten Krab Thorup
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2, or (at your option) any later version.
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GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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GNU CC; see the file COPYING. If not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* As a special exception, if you link this library with files compiled with
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GCC to produce an executable, this does not cause the resulting executable
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to be covered by the GNU General Public License. This exception does not
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however invalidate any other reasons why the executable file might be
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covered by the GNU General Public License. */
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#include "runtime.h"
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#include "objc/sarray.h"
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/* Initial selector hash table size. Value doesnt matter much */
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#define SELECTOR_HASH_SIZE 128
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/* Tables mapping selector names to uid and opposite */
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static struct sarray* __objc_selector_array = 0; /* uid -> name */
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static cache_ptr __objc_selector_hash = 0; /* name -> uid */
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static void register_selectors_from_list(MethodList_t);
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/* Number of selectors stored in each of the above tables */
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int __objc_selector_max_index = 0;
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void __objc_init_selector_tables()
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{
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__objc_selector_array = sarray_new (SELECTOR_HASH_SIZE, 0);
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__objc_selector_hash
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= hash_new (SELECTOR_HASH_SIZE,
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(hash_func_type) hash_string,
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(compare_func_type) compare_strings);
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}
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/* This routine is given a class and records all of the methods in its class
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structure in the record table. */
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void
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__objc_register_selectors_from_class (Class* class)
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{
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MethodList_t method_list;
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method_list = class->methods;
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while (method_list)
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{
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register_selectors_from_list (method_list);
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method_list = method_list->method_next;
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}
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}
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/* This routine is given a list of methods and records each of the methods in
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the record table. This is the routine that does the actual recording
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work.
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This one is only called for Class objects. For categories,
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class_add_method_list is called.
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*/
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static void
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register_selectors_from_list (MethodList_t method_list)
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{
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int i = 0;
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while (i < method_list->method_count)
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{
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Method_t method = &method_list->method_list[i];
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method->method_name = sel_register_name ((char*)method->method_name);
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i += 1;
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}
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}
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/* return selector representing name */
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SEL
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sel_get_uid (const char *name)
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{
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return (SEL) hash_value_for_key (__objc_selector_hash, name);
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}
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/* Get name of selector. If selector is unknown, the empty string ""
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is returned */
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const char*
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sel_get_name (SEL selector)
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{
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if ((soffset_decode((sidx)selector) > 0)
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&& (soffset_decode((sidx)selector) <= __objc_selector_max_index))
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return sarray_get (__objc_selector_array, (sidx) selector);
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else
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return NULL;
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}
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BOOL
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sel_is_mapped (SEL selector)
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{
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unsigned int idx = soffset_decode ((sidx)selector);
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return ((idx > 0) && (idx <= __objc_selector_max_index));
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}
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#ifdef OBJC_SPARSE_LOOKUP
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/* The uninstalled dispatch table */
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extern struct sarray* __objc_uninstalled_dtable;
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#endif
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/* Store the passed selector name in the selector record and return its
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selector value (value returned by sel_get_uid). */
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SEL
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sel_register_name (const char *sel)
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{
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SEL j;
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sidx i;
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if ((j = sel_get_uid ((const char *) sel)))
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return j;
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/* Save the selector name. */
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__objc_selector_max_index += 1;
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i = soffset_encode(__objc_selector_max_index);
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DEBUG_PRINTF ("Record selector %s as: %#x\n", sel, i);
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sarray_at_put_safe (__objc_selector_array, i, (void *) sel);
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hash_add (&__objc_selector_hash, (void *) sel, (void *) i);
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#ifdef OBJC_SPARSE_LOOKUP
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sarray_realloc(__objc_uninstalled_dtable, __objc_selector_max_index+1);
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#endif
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return (SEL) i;
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}
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