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1 | /* classes: h_files */ |
2 | ||
3 | #ifndef SMOBH | |
4 | #define SMOBH | |
7dc6e754 | 5 | /* Copyright (C) 1995,1996,1998 Free Software Foundation, Inc. |
0f2d19dd JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2, or (at your option) | |
10 | * any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this software; see the file COPYING. If not, write to | |
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19 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
20 | * Boston, MA 02111-1307 USA | |
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21 | * |
22 | * As a special exception, the Free Software Foundation gives permission | |
23 | * for additional uses of the text contained in its release of GUILE. | |
24 | * | |
25 | * The exception is that, if you link the GUILE library with other files | |
26 | * to produce an executable, this does not by itself cause the | |
27 | * resulting executable to be covered by the GNU General Public License. | |
28 | * Your use of that executable is in no way restricted on account of | |
29 | * linking the GUILE library code into it. | |
30 | * | |
31 | * This exception does not however invalidate any other reasons why | |
32 | * the executable file might be covered by the GNU General Public License. | |
33 | * | |
34 | * This exception applies only to the code released by the | |
35 | * Free Software Foundation under the name GUILE. If you copy | |
36 | * code from other Free Software Foundation releases into a copy of | |
37 | * GUILE, as the General Public License permits, the exception does | |
38 | * not apply to the code that you add in this way. To avoid misleading | |
39 | * anyone as to the status of such modified files, you must delete | |
40 | * this exception notice from them. | |
41 | * | |
42 | * If you write modifications of your own for GUILE, it is your choice | |
43 | * whether to permit this exception to apply to your modifications. | |
82892bed | 44 | * If you do not wish that, delete this exception notice. */ |
0f2d19dd | 45 | \f |
b4309c3c | 46 | #include "libguile/__scm.h" |
b08323d1 | 47 | #include "libguile/print.h" |
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48 | |
49 | \f | |
9dd5943c MD |
50 | /* This is the internal representation of a smob type */ |
51 | ||
52 | typedef struct scm_smob_descriptor | |
53 | { | |
54 | char *name; | |
55 | scm_sizet size; | |
56 | SCM (*mark) SCM_P ((SCM)); | |
57 | scm_sizet (*free) SCM_P ((SCM)); | |
58 | int (*print) SCM_P ((SCM exp, SCM port, scm_print_state *pstate)); | |
59 | SCM (*equalp) SCM_P ((SCM, SCM)); | |
60 | } scm_smob_descriptor; | |
61 | ||
62 | /* scm_smobfuns is the argument type for the obsolete function scm_newsmob */ | |
63 | ||
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64 | typedef struct scm_smobfuns |
65 | { | |
66 | SCM (*mark) SCM_P ((SCM)); | |
67 | scm_sizet (*free) SCM_P ((SCM)); | |
19402679 | 68 | int (*print) SCM_P ((SCM exp, SCM port, scm_print_state *pstate)); |
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69 | SCM (*equalp) SCM_P ((SCM, SCM)); |
70 | } scm_smobfuns; | |
71 | ||
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72 | \f |
73 | ||
9dd5943c | 74 | #define SCM_NEWSMOB(z, tc, data) \ |
23a62151 | 75 | do { \ |
9dd5943c MD |
76 | SCM_NEWCELL (z); \ |
77 | SCM_SETCDR (z, data); \ | |
78 | SCM_SETCAR (z, tc); \ | |
23a62151 MD |
79 | } while (0) |
80 | ||
81 | #define SCM_RETURN_NEWSMOB(tc, data) \ | |
82 | do { SCM __SCM_smob_answer; \ | |
83 | SCM_NEWSMOB (__SCM_smob_answer, tc, data); \ | |
84 | return __SCM_smob_answer; \ | |
85 | } while (0) | |
86 | ||
9dd5943c MD |
87 | |
88 | #define SCM_SMOB_DATA(x) SCM_CDR (x) | |
89 | #define SCM_SET_SMOB_DATA(x, data) SCM_SETCDR (x, data) | |
da61c37a MD |
90 | #define SCM_TC2SMOBNUM(x) (0x0ff & ((x) >> 8)) |
91 | #define SCM_SMOBNUM(x) (SCM_TC2SMOBNUM (SCM_CAR (x))) | |
9dd5943c | 92 | #define SCM_SMOBNAME(smobnum) scm_smobs[smobnum].name |
0f2d19dd | 93 | |
4e6e2119 | 94 | extern int scm_numsmob; |
9dd5943c | 95 | extern scm_smob_descriptor *scm_smobs; |
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96 | |
97 | \f | |
0f2d19dd | 98 | |
9dd5943c MD |
99 | extern SCM scm_mark0 SCM_P ((SCM ptr)); |
100 | extern SCM scm_markcdr SCM_P ((SCM ptr)); | |
101 | extern scm_sizet scm_free0 SCM_P ((SCM ptr)); | |
102 | extern scm_sizet scm_smob_free (SCM obj); | |
103 | extern int scm_smob_print (SCM exp, SCM port, scm_print_state *pstate); | |
23a62151 MD |
104 | |
105 | /* These next two functions are the supported way to create new SMOB types. | |
106 | ||
107 | scm_make_smob_type is useful if there are no special smob functions | |
108 | and the defaults work for mark,free,print,equal_p, or you want to use | |
109 | scm_set_smob_{mark,free,print,equalp}, below. | |
110 | ||
111 | scm_make_smob_type_mfpe is ideal if you need to set one or more of | |
112 | the special smob functions-- use NULL for when the default function | |
113 | is fine | |
114 | */ | |
115 | ||
9dd5943c | 116 | extern long scm_make_smob_type (char *name, scm_sizet size); |
23a62151 MD |
117 | |
118 | extern long scm_make_smob_type_mfpe (char *name, scm_sizet size, | |
119 | SCM (*mark) (SCM), | |
120 | scm_sizet (*free) (SCM), | |
121 | int (*print) (SCM, SCM, scm_print_state*), | |
122 | SCM (*equalp) (SCM, SCM)); | |
123 | ||
9dd5943c MD |
124 | extern void scm_set_smob_mark (long tc, SCM (*mark) (SCM)); |
125 | extern void scm_set_smob_free (long tc, scm_sizet (*free) (SCM)); | |
126 | extern void scm_set_smob_print (long tc, int (*print) (SCM, | |
127 | SCM, | |
128 | scm_print_state*)); | |
129 | extern void scm_set_smob_equalp (long tc, SCM (*equalp) (SCM, SCM)); | |
23a62151 MD |
130 | /* convenience function for registering multiple handler fns */ |
131 | extern void scm_set_smob_mfpe (long tc, | |
132 | SCM (*mark) (SCM), | |
133 | scm_sizet (*free) (SCM), | |
134 | int (*print) (SCM, SCM, scm_print_state*), | |
135 | SCM (*equalp) (SCM, SCM)); | |
136 | ||
137 | ||
9dd5943c MD |
138 | extern SCM scm_make_smob (long tc); |
139 | extern void scm_smob_prehistory (void); | |
0f2d19dd | 140 | |
9dd5943c MD |
141 | /* Deprecated function */ |
142 | extern long scm_newsmob (const scm_smobfuns *smob); | |
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143 | |
144 | #endif /* SMOBH */ |