1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc.
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)
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.
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
18 * As a special exception, the Free Software Foundation gives permission
19 * for additional uses of the text contained in its release of GUILE.
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.
27 * This exception does not however invalidate any other reasons why
28 * the executable file might be covered by the GNU General Public License.
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.
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. */
47 #include "libguile/_scm.h"
48 #include "libguile/ports.h"
49 #include "libguile/root.h"
50 #include "libguile/smob.h"
51 #include "libguile/hashtab.h"
53 #include "libguile/validate.h"
54 #include "libguile/keywords.h"
57 scm_t_bits scm_tc16_keyword
;
60 keyword_print (SCM exp
, SCM port
, scm_print_state
*pstate SCM_UNUSED
)
62 SCM symbol
= SCM_KEYWORDSYM (exp
);
64 scm_puts ("#:", port
);
65 scm_print_symbol_name (SCM_SYMBOL_CHARS (symbol
) + 1,
66 SCM_SYMBOL_LENGTH (symbol
) - 1,
68 scm_remember_upto_here_1 (symbol
);
72 SCM_DEFINE (scm_make_keyword_from_dash_symbol
, "make-keyword-from-dash-symbol", 1, 0, 0,
74 "Make a keyword object from a @var{symbol} that starts with a dash.")
75 #define FUNC_NAME s_scm_make_keyword_from_dash_symbol
79 SCM_ASSERT (SCM_SYMBOLP (symbol
)
80 && ('-' == SCM_SYMBOL_CHARS(symbol
)[0]),
81 symbol
, SCM_ARG1
, FUNC_NAME
);
84 keyword
= scm_hashq_ref (scm_keyword_obarray
, symbol
, SCM_BOOL_F
);
85 if (SCM_FALSEP (keyword
))
87 SCM_NEWSMOB (keyword
, scm_tc16_keyword
, SCM_UNPACK (symbol
));
88 scm_hashq_set_x (scm_keyword_obarray
, symbol
, keyword
);
96 scm_c_make_keyword (char *s
)
98 char *buf
= scm_malloc (strlen (s
) + 2);
103 symbol
= scm_str2symbol (buf
);
106 return scm_make_keyword_from_dash_symbol (symbol
);
109 SCM_DEFINE (scm_keyword_p
, "keyword?", 1, 0, 0,
111 "Return @code{#t} if the argument @var{obj} is a keyword, else\n"
113 #define FUNC_NAME s_scm_keyword_p
115 return SCM_BOOL (SCM_KEYWORDP (obj
));
120 SCM_DEFINE (scm_keyword_dash_symbol
, "keyword-dash-symbol", 1, 0, 0,
122 "Return the dash symbol for @var{keyword}.\n"
123 "This is the inverse of @code{make-keyword-from-dash-symbol}.")
124 #define FUNC_NAME s_scm_keyword_dash_symbol
126 SCM_VALIDATE_KEYWORD (1, keyword
);
127 return SCM_KEYWORDSYM (keyword
);
136 scm_tc16_keyword
= scm_make_smob_type ("keyword", 0);
137 scm_set_smob_mark (scm_tc16_keyword
, scm_markcdr
);
138 scm_set_smob_print (scm_tc16_keyword
, keyword_print
);
140 scm_keyword_obarray
= scm_c_make_hash_table (256);
141 #ifndef SCM_MAGIC_SNARFER
142 #include "libguile/keywords.x"