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22a52da1 | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc. |
fca75708 MD |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, | |
16 | * Boston, MA 02111-1307 USA | |
17 | * | |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
40 | * If you do not wish that, delete this exception notice. */ | |
1bbd0b84 GB |
41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
fca75708 MD |
45 | \f |
46 | ||
13070bd3 DH |
47 | #include <string.h> |
48 | ||
a0599745 MD |
49 | #include "libguile/_scm.h" |
50 | #include "libguile/ports.h" | |
51 | #include "libguile/root.h" | |
52 | #include "libguile/smob.h" | |
00ffa0e7 | 53 | #include "libguile/hashtab.h" |
a0599745 MD |
54 | |
55 | #include "libguile/validate.h" | |
56 | #include "libguile/keywords.h" | |
fca75708 MD |
57 | \f |
58 | ||
e841c3e0 KN |
59 | scm_bits_t scm_tc16_keyword; |
60 | ||
fca75708 | 61 | static int |
e841c3e0 | 62 | keyword_print (SCM exp, SCM port, scm_print_state *pstate) |
fca75708 MD |
63 | { |
64 | scm_puts ("#:", port); | |
a002f1a2 | 65 | scm_puts(1 + SCM_SYMBOL_CHARS (SCM_CDR (exp)), port); |
fca75708 MD |
66 | return 1; |
67 | } | |
68 | ||
a1ec6916 | 69 | SCM_DEFINE (scm_make_keyword_from_dash_symbol, "make-keyword-from-dash-symbol", 1, 0, 0, |
1bbd0b84 | 70 | (SCM symbol), |
872e0c72 | 71 | "Make a keyword object from a @var{symbol} that starts with a dash.") |
1bbd0b84 | 72 | #define FUNC_NAME s_scm_make_keyword_from_dash_symbol |
fca75708 | 73 | { |
86d31dfe | 74 | SCM keyword; |
fca75708 | 75 | |
0b5f3f34 | 76 | SCM_ASSERT (SCM_SYMBOLP (symbol) |
86c991c2 | 77 | && ('-' == SCM_SYMBOL_CHARS(symbol)[0]), |
1bbd0b84 | 78 | symbol, SCM_ARG1, FUNC_NAME); |
fca75708 MD |
79 | |
80 | SCM_DEFER_INTS; | |
86d31dfe MV |
81 | keyword = scm_hashq_ref (scm_keyword_obarray, symbol, SCM_BOOL_F); |
82 | if (SCM_FALSEP (keyword)) | |
fca75708 | 83 | { |
54778cd3 | 84 | SCM_NEWSMOB (keyword, scm_tc16_keyword, SCM_UNPACK (symbol)); |
86d31dfe | 85 | scm_hashq_set_x (scm_keyword_obarray, symbol, keyword); |
fca75708 MD |
86 | } |
87 | SCM_ALLOW_INTS; | |
86d31dfe | 88 | return keyword; |
fca75708 | 89 | } |
1bbd0b84 | 90 | #undef FUNC_NAME |
fca75708 | 91 | |
430a6cc3 MD |
92 | SCM |
93 | scm_c_make_keyword (char *s) | |
94 | { | |
430a6cc3 | 95 | char *buf = scm_must_malloc (strlen (s) + 2, "keyword"); |
85db4a2c DH |
96 | SCM symbol; |
97 | ||
430a6cc3 MD |
98 | buf[0] = '-'; |
99 | strcpy (buf + 1, s); | |
85db4a2c | 100 | symbol = scm_str2symbol (buf); |
430a6cc3 | 101 | scm_must_free (buf); |
85db4a2c DH |
102 | scm_done_free (strlen (s) + 2); |
103 | ||
104 | return scm_make_keyword_from_dash_symbol (symbol); | |
430a6cc3 MD |
105 | } |
106 | ||
3b3b36dd | 107 | SCM_DEFINE (scm_keyword_p, "keyword?", 1, 0, 0, |
da4a1dba | 108 | (SCM obj), |
1e6808ea MG |
109 | "Return @code{#t} if the argument @var{obj} is a keyword, else\n" |
110 | "@code{#f}.") | |
1bbd0b84 | 111 | #define FUNC_NAME s_scm_keyword_p |
fca75708 | 112 | { |
22a52da1 | 113 | return SCM_BOOL (SCM_KEYWORDP (obj)); |
fca75708 | 114 | } |
1bbd0b84 | 115 | #undef FUNC_NAME |
fca75708 MD |
116 | |
117 | ||
3b3b36dd | 118 | SCM_DEFINE (scm_keyword_dash_symbol, "keyword-dash-symbol", 1, 0, 0, |
da4a1dba | 119 | (SCM keyword), |
872e0c72 NJ |
120 | "Return the dash symbol for @var{keyword}.\n" |
121 | "This is the inverse of @code{make-keyword-from-dash-symbol}.") | |
1bbd0b84 | 122 | #define FUNC_NAME s_scm_keyword_dash_symbol |
fca75708 | 123 | { |
22a52da1 DH |
124 | SCM_VALIDATE_KEYWORD (1, keyword); |
125 | return SCM_KEYWORDSYM (keyword); | |
fca75708 | 126 | } |
1bbd0b84 | 127 | #undef FUNC_NAME |
fca75708 MD |
128 | |
129 | ||
130 | ||
131 | void | |
132 | scm_init_keywords () | |
133 | { | |
e841c3e0 KN |
134 | scm_tc16_keyword = scm_make_smob_type ("keyword", 0); |
135 | scm_set_smob_mark (scm_tc16_keyword, scm_markcdr); | |
136 | scm_set_smob_print (scm_tc16_keyword, keyword_print); | |
f5f2dcff | 137 | |
00ffa0e7 | 138 | scm_keyword_obarray = scm_c_make_hash_table (256); |
8dc9439f | 139 | #ifndef SCM_MAGIC_SNARFER |
a0599745 | 140 | #include "libguile/keywords.x" |
8dc9439f | 141 | #endif |
fca75708 MD |
142 | } |
143 | ||
89e00824 ML |
144 | |
145 | /* | |
146 | Local Variables: | |
147 | c-file-style: "gnu" | |
148 | End: | |
149 | */ |