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e7efe8e7 | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2003, 2004, 2006, 2008, 2009 Free Software Foundation, Inc. |
fca75708 | 2 | * |
73be1d9e | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
fca75708 | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
fca75708 | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
73be1d9e | 17 | */ |
1bbd0b84 | 18 | |
1bbd0b84 | 19 | |
fca75708 | 20 | \f |
dbb605f5 LC |
21 | #ifdef HAVE_CONFIG_H |
22 | # include <config.h> | |
23 | #endif | |
fca75708 | 24 | |
13070bd3 | 25 | #include <string.h> |
a16d4e82 | 26 | #include <stdarg.h> |
13070bd3 | 27 | |
a0599745 | 28 | #include "libguile/_scm.h" |
4e047c3e | 29 | #include "libguile/async.h" |
a0599745 MD |
30 | #include "libguile/ports.h" |
31 | #include "libguile/root.h" | |
32 | #include "libguile/smob.h" | |
00ffa0e7 | 33 | #include "libguile/hashtab.h" |
a0599745 MD |
34 | |
35 | #include "libguile/validate.h" | |
36 | #include "libguile/keywords.h" | |
cc95e00a MV |
37 | #include "libguile/strings.h" |
38 | ||
fca75708 MD |
39 | \f |
40 | ||
e7efe8e7 AW |
41 | static SCM keyword_obarray; |
42 | ||
92c2555f | 43 | scm_t_bits scm_tc16_keyword; |
e841c3e0 | 44 | |
265a7997 MV |
45 | #define KEYWORDP(X) (SCM_SMOB_PREDICATE (scm_tc16_keyword, (X))) |
46 | #define KEYWORDSYM(X) (SCM_SMOB_OBJECT (X)) | |
47 | ||
fca75708 | 48 | static int |
e81d98ec | 49 | keyword_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
fca75708 MD |
50 | { |
51 | scm_puts ("#:", port); | |
265a7997 | 52 | scm_display (KEYWORDSYM (exp), port); |
fca75708 MD |
53 | return 1; |
54 | } | |
55 | ||
265a7997 MV |
56 | SCM_DEFINE (scm_keyword_p, "keyword?", 1, 0, 0, |
57 | (SCM obj), | |
58 | "Return @code{#t} if the argument @var{obj} is a keyword, else\n" | |
59 | "@code{#f}.") | |
60 | #define FUNC_NAME s_scm_keyword_p | |
61 | { | |
62 | return scm_from_bool (KEYWORDP (obj)); | |
63 | } | |
64 | #undef FUNC_NAME | |
65 | ||
66 | SCM_DEFINE (scm_symbol_to_keyword, "symbol->keyword", 1, 0, 0, | |
67 | (SCM symbol), | |
68 | "Return the keyword with the same name as @var{symbol}.") | |
69 | #define FUNC_NAME s_scm_symbol_to_keyword | |
fca75708 | 70 | { |
86d31dfe | 71 | SCM keyword; |
fca75708 | 72 | |
d7212289 | 73 | SCM_ASSERT_TYPE (scm_is_symbol (symbol), symbol, 0, NULL, "symbol"); |
fca75708 | 74 | |
9de87eea | 75 | SCM_CRITICAL_SECTION_START; |
a61b2054 | 76 | /* njrev: NEWSMOB and hashq_set_x can raise errors */ |
e7efe8e7 | 77 | keyword = scm_hashq_ref (keyword_obarray, symbol, SCM_BOOL_F); |
7888309b | 78 | if (scm_is_false (keyword)) |
fca75708 | 79 | { |
54778cd3 | 80 | SCM_NEWSMOB (keyword, scm_tc16_keyword, SCM_UNPACK (symbol)); |
e7efe8e7 | 81 | scm_hashq_set_x (keyword_obarray, symbol, keyword); |
fca75708 | 82 | } |
9de87eea | 83 | SCM_CRITICAL_SECTION_END; |
86d31dfe | 84 | return keyword; |
fca75708 | 85 | } |
1bbd0b84 | 86 | #undef FUNC_NAME |
fca75708 | 87 | |
265a7997 MV |
88 | SCM_DEFINE (scm_keyword_to_symbol, "keyword->symbol", 1, 0, 0, |
89 | (SCM keyword), | |
90 | "Return the symbol with the same name as @var{keyword}.") | |
91 | #define FUNC_NAME s_scm_keyword_to_symbol | |
430a6cc3 | 92 | { |
265a7997 MV |
93 | scm_assert_smob_type (scm_tc16_keyword, keyword); |
94 | return KEYWORDSYM (keyword); | |
430a6cc3 | 95 | } |
265a7997 | 96 | #undef FUNC_NAME |
430a6cc3 | 97 | |
265a7997 MV |
98 | int |
99 | scm_is_keyword (SCM val) | |
fca75708 | 100 | { |
265a7997 | 101 | return KEYWORDP (val); |
fca75708 MD |
102 | } |
103 | ||
265a7997 | 104 | SCM |
c428e586 | 105 | scm_from_locale_keyword (const char *name) |
fca75708 | 106 | { |
c428e586 | 107 | return scm_symbol_to_keyword (scm_from_locale_symbol (name)); |
fca75708 | 108 | } |
fca75708 | 109 | |
265a7997 | 110 | SCM |
c428e586 | 111 | scm_from_locale_keywordn (const char *name, size_t len) |
265a7997 | 112 | { |
c428e586 MW |
113 | return scm_symbol_to_keyword (scm_from_locale_symboln (name, len)); |
114 | } | |
115 | ||
116 | SCM | |
117 | scm_from_latin1_keyword (const char *name) | |
118 | { | |
119 | return scm_symbol_to_keyword (scm_from_latin1_symbol (name)); | |
120 | } | |
121 | ||
122 | SCM | |
123 | scm_from_utf8_keyword (const char *name) | |
124 | { | |
125 | return scm_symbol_to_keyword (scm_from_utf8_symbol (name)); | |
265a7997 | 126 | } |
fca75708 | 127 | |
a16d4e82 MW |
128 | SCM_SYMBOL (scm_keyword_argument_error, "keyword-argument-error"); |
129 | ||
130 | void | |
131 | scm_c_bind_keyword_arguments (const char *subr, SCM rest, | |
132 | scm_t_keyword_arguments_flags flags, ...) | |
133 | { | |
134 | va_list va; | |
135 | ||
136 | if (SCM_UNLIKELY (!(flags & SCM_ALLOW_NON_KEYWORD_ARGUMENTS) | |
137 | && scm_ilength (rest) % 2 != 0)) | |
138 | scm_error (scm_keyword_argument_error, | |
139 | subr, "Odd length of keyword argument list", | |
140 | SCM_EOL, SCM_BOOL_F); | |
141 | ||
142 | while (scm_is_pair (rest)) | |
143 | { | |
144 | SCM kw_or_arg = SCM_CAR (rest); | |
145 | SCM tail = SCM_CDR (rest); | |
146 | ||
147 | if (scm_is_keyword (kw_or_arg) && scm_is_pair (tail)) | |
148 | { | |
149 | SCM kw; | |
150 | SCM *arg_p; | |
151 | ||
152 | va_start (va, flags); | |
153 | for (;;) | |
154 | { | |
155 | kw = va_arg (va, SCM); | |
156 | if (SCM_UNBNDP (kw)) | |
157 | { | |
158 | /* KW_OR_ARG is not in the list of expected keywords. */ | |
159 | if (!(flags & SCM_ALLOW_OTHER_KEYS)) | |
160 | scm_error (scm_keyword_argument_error, | |
161 | subr, "Unrecognized keyword", | |
162 | SCM_EOL, SCM_BOOL_F); | |
163 | break; | |
164 | } | |
165 | arg_p = va_arg (va, SCM *); | |
166 | if (scm_is_eq (kw_or_arg, kw)) | |
167 | { | |
168 | /* We found the matching keyword. Store the | |
169 | associated value and break out of the loop. */ | |
170 | *arg_p = SCM_CAR (tail); | |
171 | break; | |
172 | } | |
173 | } | |
174 | va_end (va); | |
175 | ||
176 | /* Advance REST. */ | |
177 | rest = SCM_CDR (tail); | |
178 | } | |
179 | else | |
180 | { | |
181 | /* The next argument is not a keyword, or is a singleton | |
182 | keyword at the end of REST. */ | |
183 | if (!(flags & SCM_ALLOW_NON_KEYWORD_ARGUMENTS)) | |
184 | scm_error (scm_keyword_argument_error, | |
185 | subr, "Invalid keyword", | |
186 | SCM_EOL, SCM_BOOL_F); | |
187 | ||
188 | /* Advance REST. */ | |
189 | rest = tail; | |
190 | } | |
191 | } | |
192 | } | |
193 | ||
a61b2054 | 194 | /* njrev: critical sections reviewed so far up to here */ |
fca75708 MD |
195 | void |
196 | scm_init_keywords () | |
197 | { | |
e841c3e0 | 198 | scm_tc16_keyword = scm_make_smob_type ("keyword", 0); |
e841c3e0 | 199 | scm_set_smob_print (scm_tc16_keyword, keyword_print); |
f5f2dcff | 200 | |
e7efe8e7 | 201 | keyword_obarray = scm_c_make_hash_table (0); |
a0599745 | 202 | #include "libguile/keywords.x" |
fca75708 MD |
203 | } |
204 | ||
89e00824 ML |
205 | |
206 | /* | |
207 | Local Variables: | |
208 | c-file-style: "gnu" | |
209 | End: | |
210 | */ |