| 1 | /* Copyright (C) 1995,1996,1997,1998, 1999 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, Inc., 59 Temple Place, Suite 330, |
| 16 | * Boston, MA 02111-1307 USA |
| 17 | * |
| 18 | * As a special exception, the Free Software Foundation gives permission |
| 19 | * for additional uses of the text contained in its release of GUILE. |
| 20 | * |
| 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. |
| 26 | * |
| 27 | * This exception does not however invalidate any other reasons why |
| 28 | * the executable file might be covered by the GNU General Public License. |
| 29 | * |
| 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. |
| 37 | * |
| 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. */ |
| 41 | |
| 42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, |
| 43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ |
| 44 | |
| 45 | \f |
| 46 | |
| 47 | #include <stdio.h> |
| 48 | #include "_scm.h" |
| 49 | #include "genio.h" |
| 50 | #include "smob.h" |
| 51 | |
| 52 | #include "validate.h" |
| 53 | #include "keywords.h" |
| 54 | \f |
| 55 | |
| 56 | static int |
| 57 | prin_keyword (SCM exp,SCM port,scm_print_state *pstate) |
| 58 | { |
| 59 | scm_puts ("#:", port); |
| 60 | scm_puts(1 + SCM_CHARS (SCM_CDR (exp)), port); |
| 61 | return 1; |
| 62 | } |
| 63 | |
| 64 | int scm_tc16_keyword; |
| 65 | |
| 66 | /* This global is only kept for backward compatibility. |
| 67 | Will be removed in next release. */ |
| 68 | int scm_tc16_kw; |
| 69 | |
| 70 | |
| 71 | SCM_DEFINE (scm_make_keyword_from_dash_symbol, "make-keyword-from-dash-symbol", 1, 0, 0, |
| 72 | (SCM symbol), |
| 73 | "Return a keyword object from SYMBOL that starts with `-' (a dash).") |
| 74 | #define FUNC_NAME s_scm_make_keyword_from_dash_symbol |
| 75 | { |
| 76 | SCM vcell; |
| 77 | |
| 78 | SCM_ASSERT (SCM_SYMBOLP (symbol) |
| 79 | && ('-' == SCM_CHARS(symbol)[0]), |
| 80 | symbol, SCM_ARG1, FUNC_NAME); |
| 81 | |
| 82 | SCM_DEFER_INTS; |
| 83 | vcell = scm_sym2ovcell_soft (symbol, scm_keyword_obarray); |
| 84 | if (vcell == SCM_BOOL_F) |
| 85 | { |
| 86 | SCM keyword; |
| 87 | SCM_NEWSMOB (keyword, scm_tc16_keyword, symbol); |
| 88 | scm_intern_symbol (scm_keyword_obarray, symbol); |
| 89 | vcell = scm_sym2ovcell_soft (symbol, scm_keyword_obarray); |
| 90 | SCM_SETCDR (vcell, keyword); |
| 91 | } |
| 92 | SCM_ALLOW_INTS; |
| 93 | return SCM_CDR (vcell); |
| 94 | } |
| 95 | #undef FUNC_NAME |
| 96 | |
| 97 | SCM |
| 98 | scm_c_make_keyword (char *s) |
| 99 | { |
| 100 | SCM vcell; |
| 101 | char *buf = scm_must_malloc (strlen (s) + 2, "keyword"); |
| 102 | buf[0] = '-'; |
| 103 | strcpy (buf + 1, s); |
| 104 | vcell = scm_sysintern0 (buf); |
| 105 | scm_must_free (buf); |
| 106 | return scm_make_keyword_from_dash_symbol (SCM_CAR (vcell)); |
| 107 | } |
| 108 | |
| 109 | SCM_DEFINE (scm_keyword_p, "keyword?", 1, 0, 0, |
| 110 | (SCM obj), |
| 111 | "Returns #t if the argument OBJ is a keyword, else #f.") |
| 112 | #define FUNC_NAME s_scm_keyword_p |
| 113 | { |
| 114 | return SCM_BOOL(SCM_KEYWORDP (obj)); |
| 115 | } |
| 116 | #undef FUNC_NAME |
| 117 | |
| 118 | |
| 119 | SCM_DEFINE (scm_keyword_dash_symbol, "keyword-dash-symbol", 1, 0, 0, |
| 120 | (SCM keyword), |
| 121 | "Return KEYWORD as a dash symbol.\n" |
| 122 | "This is the inverse of `make-keyword-from-dash-symbol'.\n") |
| 123 | #define FUNC_NAME s_scm_keyword_dash_symbol |
| 124 | { |
| 125 | SCM_VALIDATE_KEYWORD (1,keyword); |
| 126 | return SCM_CDR (keyword); |
| 127 | } |
| 128 | #undef FUNC_NAME |
| 129 | |
| 130 | |
| 131 | |
| 132 | void |
| 133 | scm_init_keywords () |
| 134 | { |
| 135 | scm_tc16_keyword = scm_make_smob_type_mfpe ("keyword", 0, |
| 136 | scm_markcdr, NULL, prin_keyword, NULL); |
| 137 | scm_tc16_kw = scm_tc16_keyword; |
| 138 | scm_keyword_obarray = scm_make_vector (SCM_MAKINUM (256), SCM_EOL); |
| 139 | #include "keywords.x" |
| 140 | } |
| 141 | |