| 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, 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 <stdio.h> |
| 44 | #include "_scm.h" |
| 45 | |
| 46 | #include "smob.h" |
| 47 | |
| 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 | |
| 62 | |
| 63 | long |
| 64 | scm_newsmob (smob) |
| 65 | scm_smobfuns *smob; |
| 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 | |
| 116 | |
| 117 | void |
| 118 | scm_smob_prehistory () |
| 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 | |