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/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2003, 2004, 2006, 2008 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include "libguile/_scm.h"
#include "libguile/async.h"
#include "libguile/ports.h"
#include "libguile/root.h"
#include "libguile/smob.h"
#include "libguile/hashtab.h"
#include "libguile/validate.h"
#include "libguile/keywords.h"
#include "libguile/strings.h"
scm_t_bits scm_tc16_keyword;
#define KEYWORDP(X) (SCM_SMOB_PREDICATE (scm_tc16_keyword, (X)))
#define KEYWORDSYM(X) (SCM_SMOB_OBJECT (X))
static int
keyword_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED)
{
scm_puts ("#:", port);
scm_display (KEYWORDSYM (exp), port);
return 1;
}
SCM_DEFINE (scm_keyword_p, "keyword?", 1, 0, 0,
(SCM obj),
"Return @code{#t} if the argument @var{obj} is a keyword, else\n"
"@code{#f}.")
#define FUNC_NAME s_scm_keyword_p
{
return scm_from_bool (KEYWORDP (obj));
}
#undef FUNC_NAME
SCM_DEFINE (scm_symbol_to_keyword, "symbol->keyword", 1, 0, 0,
(SCM symbol),
"Return the keyword with the same name as @var{symbol}.")
#define FUNC_NAME s_scm_symbol_to_keyword
{
SCM keyword;
SCM_ASSERT_TYPE (scm_is_symbol (symbol), symbol, 0, NULL, "symbol");
SCM_CRITICAL_SECTION_START;
/* njrev: NEWSMOB and hashq_set_x can raise errors */
keyword = scm_hashq_ref (scm_keyword_obarray, symbol, SCM_BOOL_F);
if (scm_is_false (keyword))
{
SCM_NEWSMOB (keyword, scm_tc16_keyword, SCM_UNPACK (symbol));
scm_hashq_set_x (scm_keyword_obarray, symbol, keyword);
}
SCM_CRITICAL_SECTION_END;
return keyword;
}
#undef FUNC_NAME
SCM_DEFINE (scm_keyword_to_symbol, "keyword->symbol", 1, 0, 0,
(SCM keyword),
"Return the symbol with the same name as @var{keyword}.")
#define FUNC_NAME s_scm_keyword_to_symbol
{
scm_assert_smob_type (scm_tc16_keyword, keyword);
return KEYWORDSYM (keyword);
}
#undef FUNC_NAME
int
scm_is_keyword (SCM val)
{
return KEYWORDP (val);
}
SCM
scm_from_locale_keyword (const char *str)
{
return scm_symbol_to_keyword (scm_from_locale_symbol (str));
}
SCM
scm_from_locale_keywordn (const char *str, size_t len)
{
return scm_symbol_to_keyword (scm_from_locale_symboln (str, len));
}
/* njrev: critical sections reviewed so far up to here */
void
scm_init_keywords ()
{
scm_tc16_keyword = scm_make_smob_type ("keyword", 0);
scm_set_smob_print (scm_tc16_keyword, keyword_print);
scm_keyword_obarray = scm_c_make_hash_table (0);
#include "libguile/keywords.x"
}
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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