1 /* keyword.c -*- mode:c; coding:utf-8; -*-
2 *
3 * Copyright (c) 2010-2021 Takashi Kato <ktakashi@ymail.com>
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
22 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $Id: $
29 */
30 #define LIBSAGITTARIUS_BODY
31 #include "sagittarius/private/keyword.h"
32 #include "sagittarius/private/error.h"
33 #include "sagittarius/private/hashtable.h"
34 #include "sagittarius/private/pair.h"
35 #include "sagittarius/private/port.h"
36 #include "sagittarius/private/string.h"
37 #include "sagittarius/private/symbol.h"
38 #include "sagittarius/private/thread.h"
39 #include "sagittarius/private/writer.h"
40 #include "sagittarius/private/builtin-keywords.h"
41
42 #include "gc-incl.inc"
43
keyword_print(SgObject obj,SgPort * port,SgWriteContext * ctx)44 static void keyword_print(SgObject obj, SgPort *port, SgWriteContext *ctx)
45 {
46 SgKeyword *k = SG_KEYWORD(obj);
47 if (SG_WRITE_MODE(ctx) == SG_WRITE_DISPLAY) {
48 Sg_Puts(port, k->name);
49 } else {
50 Sg_Putc(port, ':');
51 Sg_WriteSymbolName(k->name, port, ctx,
52 (SG_SYMBOL_WRITER_NOESCAPE_INITIAL
53 |SG_SYMBOL_WRITER_NOESCAPE_EMPTY));
54 }
55 }
56
57 SG_DEFINE_BUILTIN_CLASS_SIMPLE(Sg_KeywordClass, keyword_print);
58
59 #ifdef USE_WEAK_KEYWORD
60 # include "sagittarius/private/weak.h"
61 # define Sg_HashTableRef Sg_WeakHashTableRef
62 # define Sg_HashTableSet Sg_WeakHashTableSet
63 #endif
64
65 static struct
66 {
67 #ifdef USE_WEAK_KEYWORD
68 SgWeakHashTable *table;
69 #else
70 SgHashTable *table;
71 #endif
72 SgInternalMutex mutex;
73 } keywords = { NULL };
74
75
Sg_MakeKeyword(SgString * name)76 SgObject Sg_MakeKeyword(SgString *name)
77 {
78 SgObject r;
79 SgKeyword *k;
80
81 Sg_LockMutex(&keywords.mutex);
82 r = Sg_HashTableRef(keywords.table, name, SG_FALSE);
83 Sg_UnlockMutex(&keywords.mutex);
84
85 if (SG_KEYWORDP(r)) return r;
86
87 k = SG_NEW(SgKeyword);
88 SG_SET_CLASS(k, SG_CLASS_KEYWORD);
89 if (SG_IMMUTABLE_STRINGP(name)) {
90 k->name = name;
91 } else {
92 k->name = SG_STRING(Sg_CopyString(name));
93 }
94
95 Sg_LockMutex(&keywords.mutex);
96 r = Sg_HashTableSet(keywords.table, name, SG_OBJ(k), SG_HASH_NO_OVERWRITE);
97 Sg_UnlockMutex(&keywords.mutex);
98 return r;
99 }
100
Sg_GetKeyword(SgObject key,SgObject list,SgObject fallback)101 SgObject Sg_GetKeyword(SgObject key, SgObject list, SgObject fallback)
102 {
103 SgObject cp;
104 SG_FOR_EACH(cp, list) {
105 if (!SG_PAIRP(SG_CDR(cp))) {
106 Sg_Error(UC("incomplete key list: %S"), list);
107 }
108 if (key == SG_CAR(cp)) return SG_CADR(cp);
109 cp = SG_CDR(cp);
110 }
111 if (SG_UNBOUNDP(fallback)) {
112 Sg_Error(UC("value for key %S is not provided: %S"), key, list);
113 }
114 return fallback;
115 }
116
117 #include "builtin-keywords.c"
118
119 DEFINE_DEBUG_DUMPER(keyword, keywords.table)
120
Sg__InitKeyword()121 void Sg__InitKeyword()
122 {
123 Sg_InitMutex(&keywords.mutex, FALSE);
124 #ifdef USE_WEAK_KEYWORD
125 keywords.table =
126 SG_WEAK_HASHTABLE(Sg_MakeWeakHashTableSimple(SG_HASH_STRING,
127 SG_WEAK_REMOVE_VALUE,
128 256, SG_FALSE));
129 #else
130 keywords.table = SG_HASHTABLE(Sg_MakeHashTableSimple(SG_HASH_STRING, 256));
131 #endif
132 init_builtin_keywords();
133
134 ADD_DEBUG_DUMPER(keyword);
135 }
136 /*
137 end of file
138 Local Variables:
139 coding: utf-8-unix
140 End:
141 */
142