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142 lines
4.4 KiB
C
142 lines
4.4 KiB
C
/* Copyright (C) 1995,1996,1997,1998, 1999 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
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gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
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#include <stdio.h>
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#include "_scm.h"
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#include "genio.h"
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#include "smob.h"
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#include "scm_validate.h"
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#include "keywords.h"
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static int
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prin_keyword (SCM exp,SCM port,scm_print_state *pstate)
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{
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scm_puts ("#:", port);
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scm_puts(1 + SCM_CHARS (SCM_CDR (exp)), port);
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return 1;
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}
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int scm_tc16_keyword;
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/* This global is only kept for backward compatibility.
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Will be removed in next release. */
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int scm_tc16_kw;
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SCM_DEFINE (scm_make_keyword_from_dash_symbol, "make-keyword-from-dash-symbol", 1, 0, 0,
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(SCM symbol),
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"")
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#define FUNC_NAME s_scm_make_keyword_from_dash_symbol
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{
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SCM vcell;
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SCM_ASSERT (SCM_SYMBOLP (symbol)
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&& ('-' == SCM_CHARS(symbol)[0]),
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symbol, SCM_ARG1, FUNC_NAME);
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SCM_DEFER_INTS;
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vcell = scm_sym2ovcell_soft (symbol, scm_keyword_obarray);
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if (vcell == SCM_BOOL_F)
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{
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SCM keyword;
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SCM_NEWSMOB (keyword, scm_tc16_keyword, symbol);
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scm_intern_symbol (scm_keyword_obarray, symbol);
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vcell = scm_sym2ovcell_soft (symbol, scm_keyword_obarray);
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SCM_SETCDR (vcell, keyword);
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}
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SCM_ALLOW_INTS;
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return SCM_CDR (vcell);
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}
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#undef FUNC_NAME
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SCM
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scm_c_make_keyword (char *s)
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{
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SCM vcell;
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char *buf = scm_must_malloc (strlen (s) + 2, "keyword");
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buf[0] = '-';
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strcpy (buf + 1, s);
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vcell = scm_sysintern0 (buf);
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scm_must_free (buf);
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return scm_make_keyword_from_dash_symbol (SCM_CAR (vcell));
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}
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SCM_DEFINE (scm_keyword_p, "keyword?", 1, 0, 0,
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(SCM obj),
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"@code{keyword?} returns @code{#t} if the argument @var{kw} is a keyword;
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it returns @code{#f} otherwise.")
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#define FUNC_NAME s_scm_keyword_p
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{
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return SCM_BOOL(SCM_KEYWORDP (obj));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_keyword_dash_symbol, "keyword-dash-symbol", 1, 0, 0,
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(SCM keyword),
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"@code{keyword-dash-symbol} [FIXME: have no idea what this does; it is
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not commented.]")
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#define FUNC_NAME s_scm_keyword_dash_symbol
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{
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SCM_VALIDATE_KEYWORD (1,keyword);
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return SCM_CDR (keyword);
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}
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#undef FUNC_NAME
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void
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scm_init_keywords ()
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{
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scm_tc16_keyword = scm_make_smob_type_mfpe ("keyword", 0,
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scm_markcdr, NULL, prin_keyword, NULL);
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scm_tc16_kw = scm_tc16_keyword;
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scm_keyword_obarray = scm_make_vector (SCM_MAKINUM (256), SCM_EOL);
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#include "keywords.x"
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}
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