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1 | /* This file contains the implementation of class Protocol. |
2 | Copyright (C) 1993 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GNU CC. | |
5 | ||
6 | GNU CC is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU CC is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU CC; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* As a special exception, if you link this library with files | |
22 | compiled with GCC to produce an executable, this does not cause | |
23 | the resulting executable to be covered by the GNU General Public License. | |
24 | This exception does not however invalidate any other reasons why | |
25 | the executable file might be covered by the GNU General Public License. */ | |
26 | ||
27 | #include "objc/Protocol.h" | |
28 | #include "objc/objc-api.h" | |
29 | ||
30 | /* Method description list */ | |
31 | struct objc_method_description_list { | |
32 | int count; | |
33 | struct objc_method_description list[1]; | |
34 | }; | |
35 | ||
36 | ||
37 | @implementation Protocol | |
38 | { | |
39 | @private | |
40 | char *protocol_name; | |
41 | struct objc_protocol_list *protocol_list; | |
42 | struct objc_method_description_list *instance_methods, *class_methods; | |
43 | } | |
44 | ||
45 | /* Obtaining attributes intrinsic to the protocol */ | |
46 | ||
47 | - (const char *)name | |
48 | { | |
49 | return protocol_name; | |
50 | } | |
51 | ||
52 | /* Testing protocol conformance */ | |
53 | ||
54 | - (BOOL) conformsTo: (Protocol *)aProtocolObject | |
55 | { | |
56 | int i; | |
57 | struct objc_protocol_list* proto_list; | |
58 | ||
59 | if (!strcmp(aProtocolObject->protocol_name, self->protocol_name)) | |
60 | return YES; | |
61 | ||
62 | for (proto_list = protocol_list; proto_list; proto_list = proto_list->next) | |
63 | { | |
64 | for (i=0; i < proto_list->count; i++) | |
65 | { | |
66 | if ([proto_list->list[i] conformsTo: aProtocolObject]) | |
67 | return YES; | |
68 | } | |
69 | } | |
70 | ||
71 | return NO; | |
72 | } | |
73 | ||
74 | /* Looking up information specific to a protocol */ | |
75 | ||
76 | - (struct objc_method_description *) descriptionForInstanceMethod:(SEL)aSel | |
77 | { | |
78 | int i; | |
79 | struct objc_protocol_list* proto_list; | |
80 | const char* name = sel_get_name (aSel); | |
81 | struct objc_method_description *result; | |
82 | ||
83 | for (i = 0; i < instance_methods->count; i++) | |
84 | { | |
85 | if (!strcmp ((char*)instance_methods->list[i].name, name)) | |
86 | return &(instance_methods->list[i]); | |
87 | } | |
88 | ||
89 | for (proto_list = protocol_list; proto_list; proto_list = proto_list->next) | |
90 | { | |
91 | for (i=0; i < proto_list->count; i++) | |
92 | { | |
93 | if ((result = [proto_list->list[i] | |
94 | descriptionForInstanceMethod: aSel])) | |
95 | return result; | |
96 | } | |
97 | } | |
98 | ||
99 | return NULL; | |
100 | } | |
101 | ||
102 | - (struct objc_method_description *) descriptionForClassMethod:(SEL)aSel; | |
103 | { | |
104 | int i; | |
105 | struct objc_protocol_list* proto_list; | |
106 | const char* name = sel_get_name (aSel); | |
107 | struct objc_method_description *result; | |
108 | ||
109 | for (i = 0; i < class_methods->count; i++) | |
110 | { | |
111 | if (!strcmp ((char*)class_methods->list[i].name, name)) | |
112 | return &(class_methods->list[i]); | |
113 | } | |
114 | ||
115 | for (proto_list = protocol_list; proto_list; proto_list = proto_list->next) | |
116 | { | |
117 | for (i=0; i < proto_list->count; i++) | |
118 | { | |
119 | if ((result = [proto_list->list[i] | |
120 | descriptionForClassMethod: aSel])) | |
121 | return result; | |
122 | } | |
123 | } | |
124 | ||
125 | return NULL; | |
126 | } | |
127 | ||
128 | @end |