Return to selector.c CVS log

Up to [Apple XNU] / GNUtools / cc / objc

Annotation of GNUtools/cc/objc/selector.c, revision 1.1

1.1     ! root        1: /* GNU Objective C Runtime selector related functions
        !             2:    Copyright (C) 1993 Free Software Foundation, Inc.
        !             3: 
        !             4: Author: Kresten Krab Thorup
        !             5: 
        !             6: This file is part of GNU CC.
        !             7: 
        !             8: GNU CC is free software; you can redistribute it and/or modify it under the
        !             9:    terms of the GNU General Public License as published by the Free Software
        !            10:    Foundation; either version 2, or (at your option) any later version.
        !            11: 
        !            12: GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY
        !            13:    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
        !            14:    FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
        !            15:    details.
        !            16: 
        !            17: You should have received a copy of the GNU General Public License along with
        !            18:    GNU CC; see the file COPYING.  If not, write to the Free Software
        !            19:    Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            20: 
        !            21: /* As a special exception, if you link this library with files compiled with
        !            22:    GCC to produce an executable, this does not cause the resulting executable
        !            23:    to be covered by the GNU General Public License. This exception does not
        !            24:    however invalidate any other reasons why the executable file might be
        !            25:    covered by the GNU General Public License.  */
        !            26: 
        !            27: #include "runtime.h"
        !            28: #include "objc/sarray.h"
        !            29: 
        !            30: /* Initial selector hash table size. Value doesnt matter much */
        !            31: #define SELECTOR_HASH_SIZE 128
        !            32: 
        !            33: /* Tables mapping selector names to uid and opposite */
        !            34: static struct sarray* __objc_selector_array = 0; /* uid -> name */
        !            35: static cache_ptr      __objc_selector_hash  = 0; /* name -> uid */
        !            36: 
        !            37: static void register_selectors_from_list(MethodList_t);
        !            38: 
        !            39: /* Number of selectors stored in each of the above tables */
        !            40: int __objc_selector_max_index = 0;
        !            41: 
        !            42: void __objc_init_selector_tables()
        !            43: {
        !            44:   __objc_selector_array = sarray_new (SELECTOR_HASH_SIZE, 0);
        !            45:   __objc_selector_hash
        !            46:     = hash_new (SELECTOR_HASH_SIZE,
        !            47:                (hash_func_type) hash_string,
        !            48:                (compare_func_type) compare_strings);
        !            49: }  
        !            50: 
        !            51: /* This routine is given a class and records all of the methods in its class
        !            52:    structure in the record table.  */
        !            53: void
        !            54: __objc_register_selectors_from_class (Class* class)
        !            55: {
        !            56:   MethodList_t method_list;
        !            57: 
        !            58:   method_list = class->methods;
        !            59:   while (method_list)
        !            60:     {
        !            61:       register_selectors_from_list (method_list);
        !            62:       method_list = method_list->method_next;
        !            63:     }
        !            64: }
        !            65: 
        !            66: 
        !            67: /* This routine is given a list of methods and records each of the methods in
        !            68:    the record table.  This is the routine that does the actual recording
        !            69:    work.
        !            70: 
        !            71:    This one is only called for Class objects.  For categories,
        !            72:    class_add_method_list is called.
        !            73:    */
        !            74: static void
        !            75: register_selectors_from_list (MethodList_t method_list)
        !            76: {
        !            77:   int i = 0;
        !            78:   while (i < method_list->method_count)
        !            79:     {
        !            80:       Method_t method = &method_list->method_list[i];
        !            81:       method->method_name = sel_register_name ((char*)method->method_name);
        !            82:       i += 1;
        !            83:     }
        !            84: }
        !            85: 
        !            86: /* return selector representing name */
        !            87: SEL
        !            88: sel_get_uid (const char *name)
        !            89: {
        !            90:   return (SEL) hash_value_for_key (__objc_selector_hash, name);
        !            91: }
        !            92: 
        !            93: /* Get name of selector.  If selector is unknown, the empty string "" 
        !            94:    is returned */ 
        !            95: const char*
        !            96: sel_get_name (SEL selector)
        !            97: {
        !            98:   if ((soffset_decode((sidx)selector) > 0)
        !            99:       && (soffset_decode((sidx)selector) <= __objc_selector_max_index))
        !           100:     return sarray_get (__objc_selector_array, (sidx) selector);
        !           101:   else
        !           102:     return NULL;
        !           103: }
        !           104: 
        !           105: BOOL
        !           106: sel_is_mapped (SEL selector)
        !           107: {
        !           108:   unsigned int idx = soffset_decode ((sidx)selector);
        !           109:   return ((idx > 0) && (idx <= __objc_selector_max_index));
        !           110: }
        !           111: 
        !           112: /* The uninstalled dispatch table */
        !           113: extern struct sarray* __objc_uninstalled_dtable;
        !           114: 
        !           115: /* Store the passed selector name in the selector record and return its
        !           116:    selector value (value returned by sel_get_uid). */
        !           117: SEL
        !           118: sel_register_name (const char *sel)
        !           119: {
        !           120:   SEL j;
        !           121:   sidx i;
        !           122: 
        !           123:   if ((j = sel_get_uid ((const char *) sel)))
        !           124:     return j;
        !           125: 
        !           126:   /* Save the selector name.  */
        !           127:   __objc_selector_max_index += 1;
        !           128:   i = soffset_encode(__objc_selector_max_index);
        !           129: 
        !           130:   DEBUG_PRINTF ("Record selector %s as: %#x\n", sel, i);
        !           131: 
        !           132:   sarray_at_put_safe (__objc_selector_array, i, (void *) sel);
        !           133:   hash_add (&__objc_selector_hash, (void *) sel, (void *) i);
        !           134: 
        !           135:   sarray_realloc(__objc_uninstalled_dtable, __objc_selector_max_index+1);
        !           136: 
        !           137:   return (SEL) i;
        !           138: }
        !           139: 

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.