1
Fork 0
mirror of https://git.savannah.gnu.org/git/guile.git synced 2025-05-02 04:40:29 +02:00
guile/libguile/keywords.c
2003-04-05 19:15:35 +00:00

125 lines
3.2 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2003 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 2.1 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <string.h>
#include "libguile/_scm.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"
scm_t_bits scm_tc16_keyword;
static int
keyword_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED)
{
SCM symbol = SCM_KEYWORDSYM (exp);
scm_puts ("#:", port);
scm_print_symbol_name (SCM_SYMBOL_CHARS (symbol) + 1,
SCM_SYMBOL_LENGTH (symbol) - 1,
port);
scm_remember_upto_here_1 (symbol);
return 1;
}
SCM_DEFINE (scm_make_keyword_from_dash_symbol, "make-keyword-from-dash-symbol", 1, 0, 0,
(SCM symbol),
"Make a keyword object from a @var{symbol} that starts with a dash.")
#define FUNC_NAME s_scm_make_keyword_from_dash_symbol
{
SCM keyword;
SCM_ASSERT (SCM_SYMBOLP (symbol)
&& ('-' == SCM_SYMBOL_CHARS(symbol)[0]),
symbol, SCM_ARG1, FUNC_NAME);
SCM_DEFER_INTS;
keyword = scm_hashq_ref (scm_keyword_obarray, symbol, SCM_BOOL_F);
if (SCM_FALSEP (keyword))
{
SCM_NEWSMOB (keyword, scm_tc16_keyword, SCM_UNPACK (symbol));
scm_hashq_set_x (scm_keyword_obarray, symbol, keyword);
}
SCM_ALLOW_INTS;
return keyword;
}
#undef FUNC_NAME
SCM
scm_c_make_keyword (char *s)
{
char *buf = scm_malloc (strlen (s) + 2);
SCM symbol;
buf[0] = '-';
strcpy (buf + 1, s);
symbol = scm_str2symbol (buf);
free (buf);
return scm_make_keyword_from_dash_symbol (symbol);
}
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_BOOL (SCM_KEYWORDP (obj));
}
#undef FUNC_NAME
SCM_DEFINE (scm_keyword_dash_symbol, "keyword-dash-symbol", 1, 0, 0,
(SCM keyword),
"Return the dash symbol for @var{keyword}.\n"
"This is the inverse of @code{make-keyword-from-dash-symbol}.")
#define FUNC_NAME s_scm_keyword_dash_symbol
{
SCM_VALIDATE_KEYWORD (1, keyword);
return SCM_KEYWORDSYM (keyword);
}
#undef FUNC_NAME
void
scm_init_keywords ()
{
scm_tc16_keyword = scm_make_smob_type ("keyword", 0);
scm_set_smob_mark (scm_tc16_keyword, scm_markcdr);
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:
*/