| 1 | /* Copyright (C) 1995,1996,1997,1998 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 | \f |
| 42 | |
| 43 | #include "_scm.h" |
| 44 | #include "smob.h" |
| 45 | |
| 46 | #include "macros.h" |
| 47 | |
| 48 | long scm_tc16_macro; |
| 49 | |
| 50 | static scm_smobfuns macrosmob = {scm_markcdr, scm_free0}; |
| 51 | |
| 52 | SCM_PROC(s_makacro, "procedure->syntax", 1, 0, 0, scm_makacro); |
| 53 | |
| 54 | SCM |
| 55 | scm_makacro (code) |
| 56 | SCM code; |
| 57 | { |
| 58 | register SCM z; |
| 59 | SCM_NEWCELL (z); |
| 60 | SCM_SETCDR (z, code); |
| 61 | SCM_SETCAR (z, scm_tc16_macro); |
| 62 | return z; |
| 63 | } |
| 64 | |
| 65 | |
| 66 | SCM_PROC(s_makmacro, "procedure->macro", 1, 0, 0, scm_makmacro); |
| 67 | |
| 68 | SCM |
| 69 | scm_makmacro (code) |
| 70 | SCM code; |
| 71 | { |
| 72 | register SCM z; |
| 73 | SCM_NEWCELL (z); |
| 74 | SCM_SETCDR (z, code); |
| 75 | SCM_SETCAR (z, scm_tc16_macro | (1L << 16)); |
| 76 | return z; |
| 77 | } |
| 78 | |
| 79 | |
| 80 | SCM_PROC(s_makmmacro, "procedure->memoizing-macro", 1, 0, 0, scm_makmmacro); |
| 81 | |
| 82 | SCM |
| 83 | scm_makmmacro (code) |
| 84 | SCM code; |
| 85 | { |
| 86 | register SCM z; |
| 87 | SCM_NEWCELL (z); |
| 88 | SCM_SETCDR (z, code); |
| 89 | SCM_SETCAR (z, scm_tc16_macro | (2L << 16)); |
| 90 | return z; |
| 91 | } |
| 92 | |
| 93 | |
| 94 | SCM_PROC (s_macro_p, "macro?", 1, 0, 0, scm_macro_p); |
| 95 | |
| 96 | SCM |
| 97 | scm_macro_p (obj) |
| 98 | SCM obj; |
| 99 | { |
| 100 | return (SCM_NIMP (obj) && SCM_TYP16 (obj) == scm_tc16_macro |
| 101 | ? SCM_BOOL_T |
| 102 | : SCM_BOOL_F); |
| 103 | } |
| 104 | |
| 105 | |
| 106 | SCM_SYMBOL (scm_sym_syntax, "syntax"); |
| 107 | SCM_SYMBOL (scm_sym_macro, "macro"); |
| 108 | SCM_SYMBOL (scm_sym_mmacro, "macro!"); |
| 109 | |
| 110 | SCM_PROC (s_macro_type, "macro-type", 1, 0, 0, scm_macro_type); |
| 111 | |
| 112 | SCM |
| 113 | scm_macro_type (m) |
| 114 | SCM m; |
| 115 | { |
| 116 | if (!(SCM_NIMP (m) && SCM_TYP16 (m) == scm_tc16_macro)) |
| 117 | return SCM_BOOL_F; |
| 118 | switch ((int) (SCM_CAR (m) >> 16)) |
| 119 | { |
| 120 | case 0: return scm_sym_syntax; |
| 121 | case 1: return scm_sym_macro; |
| 122 | case 2: return scm_sym_mmacro; |
| 123 | default: scm_wrong_type_arg (s_macro_type, 1, m); |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | |
| 128 | SCM_PROC (s_macro_name, "macro-name", 1, 0, 0, scm_macro_name); |
| 129 | |
| 130 | SCM |
| 131 | scm_macro_name (m) |
| 132 | SCM m; |
| 133 | { |
| 134 | SCM_ASSERT (SCM_NIMP (m) && SCM_TYP16 (m) == scm_tc16_macro, |
| 135 | m, |
| 136 | SCM_ARG1, |
| 137 | s_macro_name); |
| 138 | return scm_procedure_name (SCM_CDR (m)); |
| 139 | } |
| 140 | |
| 141 | |
| 142 | SCM_PROC (s_macro_transformer, "macro-transformer", 1, 0, 0, scm_macro_transformer); |
| 143 | |
| 144 | SCM |
| 145 | scm_macro_transformer (m) |
| 146 | SCM m; |
| 147 | { |
| 148 | SCM_ASSERT (SCM_NIMP (m) && SCM_TYP16 (m) == scm_tc16_macro, |
| 149 | m, |
| 150 | SCM_ARG1, |
| 151 | s_macro_transformer); |
| 152 | return SCM_CLOSUREP (SCM_CDR (m)) ? SCM_CDR (m) : SCM_BOOL_F; |
| 153 | } |
| 154 | |
| 155 | SCM |
| 156 | scm_make_synt (name, macroizer, fcn) |
| 157 | char *name; |
| 158 | SCM (*macroizer) (); |
| 159 | SCM (*fcn) (); |
| 160 | { |
| 161 | SCM symcell = scm_sysintern (name, SCM_UNDEFINED); |
| 162 | long tmp = ((((SCM_CELLPTR) (SCM_CAR (symcell))) - scm_heap_org) << 8); |
| 163 | register SCM z; |
| 164 | if ((tmp >> 8) != ((SCM_CELLPTR) (SCM_CAR (symcell)) - scm_heap_org)) |
| 165 | tmp = 0; |
| 166 | SCM_NEWCELL (z); |
| 167 | SCM_SUBRF (z) = fcn; |
| 168 | SCM_SETCAR (z, tmp + scm_tc7_subr_2); |
| 169 | SCM_SETCDR (symcell, macroizer (z)); |
| 170 | return SCM_CAR (symcell); |
| 171 | } |
| 172 | |
| 173 | void |
| 174 | scm_init_macros () |
| 175 | { |
| 176 | scm_tc16_macro = scm_newsmob (¯osmob); |
| 177 | #include "macros.x" |
| 178 | } |