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99027e3c MD |
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; | |
8499074b MD |
59 | SCM_ASSERT (SCM_NFALSEP (scm_procedure_p (code)), |
60 | code, SCM_ARG1, s_makacro); | |
99027e3c MD |
61 | SCM_NEWCELL (z); |
62 | SCM_SETCDR (z, code); | |
63 | SCM_SETCAR (z, scm_tc16_macro); | |
64 | return z; | |
65 | } | |
66 | ||
67 | ||
68 | SCM_PROC(s_makmacro, "procedure->macro", 1, 0, 0, scm_makmacro); | |
69 | ||
70 | SCM | |
71 | scm_makmacro (code) | |
72 | SCM code; | |
73 | { | |
74 | register SCM z; | |
8499074b MD |
75 | SCM_ASSERT (SCM_NFALSEP (scm_procedure_p (code)), |
76 | code, SCM_ARG1, s_makmacro); | |
99027e3c MD |
77 | SCM_NEWCELL (z); |
78 | SCM_SETCDR (z, code); | |
79 | SCM_SETCAR (z, scm_tc16_macro | (1L << 16)); | |
80 | return z; | |
81 | } | |
82 | ||
83 | ||
84 | SCM_PROC(s_makmmacro, "procedure->memoizing-macro", 1, 0, 0, scm_makmmacro); | |
85 | ||
86 | SCM | |
87 | scm_makmmacro (code) | |
88 | SCM code; | |
89 | { | |
90 | register SCM z; | |
8499074b MD |
91 | SCM_ASSERT (SCM_NFALSEP (scm_procedure_p (code)), |
92 | code, SCM_ARG1, s_makmmacro); | |
99027e3c MD |
93 | SCM_NEWCELL (z); |
94 | SCM_SETCDR (z, code); | |
95 | SCM_SETCAR (z, scm_tc16_macro | (2L << 16)); | |
96 | return z; | |
97 | } | |
98 | ||
99 | ||
100 | SCM_PROC (s_macro_p, "macro?", 1, 0, 0, scm_macro_p); | |
101 | ||
102 | SCM | |
103 | scm_macro_p (obj) | |
104 | SCM obj; | |
105 | { | |
106 | return (SCM_NIMP (obj) && SCM_TYP16 (obj) == scm_tc16_macro | |
107 | ? SCM_BOOL_T | |
108 | : SCM_BOOL_F); | |
109 | } | |
110 | ||
111 | ||
112 | SCM_SYMBOL (scm_sym_syntax, "syntax"); | |
113 | SCM_SYMBOL (scm_sym_macro, "macro"); | |
114 | SCM_SYMBOL (scm_sym_mmacro, "macro!"); | |
115 | ||
116 | SCM_PROC (s_macro_type, "macro-type", 1, 0, 0, scm_macro_type); | |
117 | ||
118 | SCM | |
119 | scm_macro_type (m) | |
120 | SCM m; | |
121 | { | |
122 | if (!(SCM_NIMP (m) && SCM_TYP16 (m) == scm_tc16_macro)) | |
123 | return SCM_BOOL_F; | |
124 | switch ((int) (SCM_CAR (m) >> 16)) | |
125 | { | |
126 | case 0: return scm_sym_syntax; | |
127 | case 1: return scm_sym_macro; | |
128 | case 2: return scm_sym_mmacro; | |
129 | default: scm_wrong_type_arg (s_macro_type, 1, m); | |
130 | } | |
131 | } | |
132 | ||
133 | ||
134 | SCM_PROC (s_macro_name, "macro-name", 1, 0, 0, scm_macro_name); | |
135 | ||
136 | SCM | |
137 | scm_macro_name (m) | |
138 | SCM m; | |
139 | { | |
140 | SCM_ASSERT (SCM_NIMP (m) && SCM_TYP16 (m) == scm_tc16_macro, | |
141 | m, | |
142 | SCM_ARG1, | |
143 | s_macro_name); | |
144 | return scm_procedure_name (SCM_CDR (m)); | |
145 | } | |
146 | ||
147 | ||
148 | SCM_PROC (s_macro_transformer, "macro-transformer", 1, 0, 0, scm_macro_transformer); | |
149 | ||
150 | SCM | |
151 | scm_macro_transformer (m) | |
152 | SCM m; | |
153 | { | |
154 | SCM_ASSERT (SCM_NIMP (m) && SCM_TYP16 (m) == scm_tc16_macro, | |
155 | m, | |
156 | SCM_ARG1, | |
157 | s_macro_transformer); | |
158 | return SCM_CLOSUREP (SCM_CDR (m)) ? SCM_CDR (m) : SCM_BOOL_F; | |
159 | } | |
160 | ||
161 | SCM | |
162 | scm_make_synt (name, macroizer, fcn) | |
163 | char *name; | |
164 | SCM (*macroizer) (); | |
165 | SCM (*fcn) (); | |
166 | { | |
167 | SCM symcell = scm_sysintern (name, SCM_UNDEFINED); | |
168 | long tmp = ((((SCM_CELLPTR) (SCM_CAR (symcell))) - scm_heap_org) << 8); | |
169 | register SCM z; | |
170 | if ((tmp >> 8) != ((SCM_CELLPTR) (SCM_CAR (symcell)) - scm_heap_org)) | |
171 | tmp = 0; | |
172 | SCM_NEWCELL (z); | |
173 | SCM_SUBRF (z) = fcn; | |
174 | SCM_SETCAR (z, tmp + scm_tc7_subr_2); | |
175 | SCM_SETCDR (symcell, macroizer (z)); | |
176 | return SCM_CAR (symcell); | |
177 | } | |
178 | ||
179 | void | |
180 | scm_init_macros () | |
181 | { | |
182 | scm_tc16_macro = scm_newsmob (¯osmob); | |
183 | #include "macros.x" | |
184 | } |