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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" | |
20e6290e JB |
45 | |
46 | #include "smob.h" | |
47 | ||
0f2d19dd JB |
48 | #ifdef HAVE_MALLOC_H |
49 | #include <malloc.h> | |
50 | #endif | |
51 | ||
52 | \f | |
53 | ||
54 | /* scm_smobs scm_numsmob | |
55 | * implement a dynamicly resized array of smob records. | |
56 | * Indexes into this table are used when generating type | |
57 | * tags for smobjects (if you know a tag you can get an index and conversely). | |
58 | */ | |
59 | scm_sizet scm_numsmob; | |
60 | scm_smobfuns *scm_smobs; | |
61 | ||
1cc91f1b | 62 | |
0f2d19dd JB |
63 | long |
64 | scm_newsmob (smob) | |
65 | scm_smobfuns *smob; | |
0f2d19dd JB |
66 | { |
67 | char *tmp; | |
68 | if (255 <= scm_numsmob) | |
69 | goto smoberr; | |
70 | SCM_DEFER_INTS; | |
71 | SCM_SYSCALL (tmp = (char *) realloc ((char *) scm_smobs, (1 + scm_numsmob) * sizeof (scm_smobfuns))); | |
72 | if (tmp) | |
73 | { | |
74 | scm_smobs = (scm_smobfuns *) tmp; | |
75 | scm_smobs[scm_numsmob].mark = smob->mark; | |
76 | scm_smobs[scm_numsmob].free = smob->free; | |
77 | scm_smobs[scm_numsmob].print = smob->print; | |
78 | scm_smobs[scm_numsmob].equalp = smob->equalp; | |
79 | scm_numsmob++; | |
80 | } | |
81 | SCM_ALLOW_INTS; | |
82 | if (!tmp) | |
83 | smoberr:scm_wta (SCM_MAKINUM ((long) scm_numsmob), (char *) SCM_NALLOC, "newsmob"); | |
84 | return scm_tc7_smob + (scm_numsmob - 1) * 256; | |
85 | } | |
86 | ||
87 | /* {Initialization for i/o types, float, bignum, the type of free cells} | |
88 | */ | |
89 | ||
90 | static scm_smobfuns freecell = | |
91 | { | |
92 | scm_mark0, | |
93 | scm_free0, | |
94 | 0, | |
95 | 0 | |
96 | }; | |
97 | ||
98 | static scm_smobfuns flob = | |
99 | { | |
100 | scm_mark0, | |
101 | /*flofree*/ 0, | |
102 | scm_floprint, | |
103 | scm_floequal | |
104 | }; | |
105 | ||
106 | static scm_smobfuns bigob = | |
107 | { | |
108 | scm_mark0, | |
109 | /*bigfree*/ 0, | |
110 | scm_bigprint, | |
111 | scm_bigequal | |
112 | }; | |
113 | ||
114 | ||
115 | ||
1cc91f1b | 116 | |
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117 | void |
118 | scm_smob_prehistory () | |
0f2d19dd JB |
119 | { |
120 | scm_numsmob = 0; | |
121 | scm_smobs = (scm_smobfuns *) malloc (7 * sizeof (scm_smobfuns)); | |
122 | ||
123 | /* WARNING: These scm_newsmob calls must be done in this order */ | |
124 | scm_newsmob (&freecell); | |
125 | scm_newsmob (&flob); | |
126 | scm_newsmob (&bigob); | |
127 | scm_newsmob (&bigob); /* n.b.: two smobs, one smobfuns */ | |
128 | } | |
129 |