libguile/kw.c

   1 /*      Copyright (C) 1995,1996 Free Software Foundation, Inc.
   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, 675 Mass Ave, Cambridge, MA 02139, USA.
  16  *
  17  * As a special exception, the Free Software Foundation gives permission
  18  * for additional uses of the text contained in its release of GUILE.
  19  *
  20  * The exception is that, if you link the GUILE library with other files
  21  * to produce an executable, this does not by itself cause the
  22  * resulting executable to be covered by the GNU General Public License.
  23  * Your use of that executable is in no way restricted on account of
  24  * linking the GUILE library code into it.
  25  *
  26  * This exception does not however invalidate any other reasons why
  27  * the executable file might be covered by the GNU General Public License.
  28  *
  29  * This exception applies only to the code released by the
  30  * Free Software Foundation under the name GUILE.  If you copy
  31  * code from other Free Software Foundation releases into a copy of
  32  * GUILE, as the General Public License permits, the exception does
  33  * not apply to the code that you add in this way.  To avoid misleading
  34  * anyone as to the status of such modified files, you must delete
  35  * this exception notice from them.
  36  *
  37  * If you write modifications of your own for GUILE, it is your choice
  38  * whether to permit this exception to apply to your modifications.
  39  * If you do not wish that, delete this exception notice.
  40  */
  41 \f
  42
  43 #include <stdio.h>
  44 #include "_scm.h"
  45
  46 \f
  47
  48 #ifdef __STDC__
  49 static scm_sizet
  50 free_kw (SCM obj)
  51 #else
  52 static scm_sizet
  53 free_kw (obj)
  54      SCM obj;
  55 #endif
  56 {
  57   return 0;
  58 }
  59
  60 #ifdef __STDC__
  61 static int
  62 prin_kw (SCM exp, SCM port, int writing)
  63 #else
  64 static int
  65 prin_kw (exp, port, writing)
  66      SCM exp;
  67      SCM port;
  68      int writing;
  69 #endif
  70 {
  71   scm_gen_puts (scm_regular_string, ":", port);
  72   scm_gen_puts((SCM_MB_STRINGP(SCM_CDR (exp))
  73                 ? scm_mb_string
  74                 : scm_regular_string),
  75                1 + SCM_CHARS (SCM_CDR (exp)),
  76                port);
  77   return 1;
  78 }
  79
  80 int scm_tc16_kw;
  81
  82 static scm_smobfuns kw_smob = {scm_markcdr, free_kw, prin_kw, 0};
  83
  84
  85
  86 SCM_PROC (s_make_keyword_from_dash_symbol, "make-keyword-from-dash-symbol", 1, 0, 0, scm_make_keyword_from_dash_symbol);
  87 #ifdef __STDC__
  88 SCM
  89 scm_make_keyword_from_dash_symbol (SCM symbol)
  90 #else
  91 SCM
  92 scm_make_keyword_from_dash_symbol (symbol)
  93      SCM symbol;
  94 #endif
  95 {
  96   SCM vcell;
  97
  98   SCM_ASSERT (SCM_NIMP (symbol) && SCM_SYMBOLP(symbol) && ('-' == SCM_CHARS(symbol)[0]),
  99           symbol, SCM_ARG1, s_make_keyword_from_dash_symbol);
 100
 101
 102   SCM_DEFER_INTS;
 103   vcell = scm_sym2ovcell_soft (symbol, scm_kw_obarray);
 104   if (vcell == SCM_BOOL_F)
 105     {
 106       SCM kw;
 107       SCM_NEWCELL(kw);
 108       SCM_CAR(kw) = (SCM)scm_tc16_kw;
 109       SCM_CDR(kw) = symbol;
 110       scm_intern_symbol (scm_kw_obarray, symbol);
 111       vcell = scm_sym2ovcell_soft (symbol, scm_kw_obarray);
 112       SCM_CDR (vcell) = kw;
 113     }
 114   SCM_ALLOW_INTS;
 115   return SCM_CDR (vcell);
 116 }
 117
 118 SCM_PROC(s_keyword_p, "keyword?", 1, 0, 0, scm_keyword_p);
 119 #ifdef __STDC__
 120 SCM
 121 scm_keyword_p (SCM obj)
 122 #else
 123 SCM
 124 scm_keyword_p (obj)
 125      SCM obj;
 126 #endif
 127 {
 128   return ( (SCM_NIMP(obj) && SCM_KEYWORDP (obj))
 129           ? SCM_BOOL_T
 130           : SCM_BOOL_F);
 131 }
 132
 133
 134
 135 SCM_PROC(s_keyword_dash_symbol, "keyword-dash-symbol", 1, 0, 0, scm_keyword_dash_symbol);
 136 #ifdef __STDC__
 137 SCM
 138 scm_keyword_dash_symbol (SCM kw)
 139 #else
 140 SCM
 141 scm_keyword_dash_symbol (kw)
 142      SCM kw;
 143 #endif
 144 {
 145   SCM_ASSERT (SCM_NIMP (kw) && SCM_KEYWORDP (kw), kw, SCM_ARG1, s_keyword_dash_symbol);
 146   return SCM_CDR (kw);
 147 }
 148
 149
 150
 151
 152 #ifdef __STDC__
 153 void
 154 scm_init_kw (void)
 155 #else
 156 void
 157 scm_init_kw ()
 158 #endif
 159 {
 160   scm_tc16_kw = scm_newsmob (&kw_smob);
 161   scm_kw_obarray = scm_make_vector (SCM_MAKINUM (256), SCM_EOL, SCM_UNDEFINED);
 162 #include "kw.x"
 163 }
 164