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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: mptext.h,v 1.2 1999/12/10 23:29:48 mdw Exp $ |
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4 | * |
5 | * Textual representation of multiprecision numbers |
6 | * |
7 | * (c) 1999 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of Catacomb. |
13 | * |
14 | * Catacomb is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
18 | * |
19 | * Catacomb is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
25 | * License along with Catacomb; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: mptext.h,v $ |
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33 | * Revision 1.2 1999/12/10 23:29:48 mdw |
34 | * Change header file guard names. |
35 | * |
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36 | * Revision 1.1 1999/11/17 18:02:16 mdw |
37 | * New multiprecision integer arithmetic suite. |
38 | * |
39 | */ |
40 | |
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41 | #ifndef CATACOMB_MPTEXT_H |
42 | #define CATACOMB_MPTEXT_H |
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43 | |
44 | #ifdef __cplusplus |
45 | extern "C" { |
46 | #endif |
47 | |
48 | /*----- Header files ------------------------------------------------------*/ |
49 | |
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50 | #ifndef CATACOMB_MP_H |
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51 | # include "mp.h" |
52 | #endif |
53 | |
54 | /*----- Data structures ---------------------------------------------------*/ |
55 | |
56 | typedef struct mptext_ops { |
57 | int (*get)(void */*p*/); |
58 | void (*unget)(int /*ch*/, void */*p*/); |
59 | int (*put)(char */*s*/, size_t /*len*/, void */*p*/); |
60 | } mptext_ops; |
61 | |
62 | /*----- Functions provided ------------------------------------------------*/ |
63 | |
64 | /* --- @mp_read@ --- * |
65 | * |
66 | * Arguments: @mp *m@ = destination multiprecision number |
67 | * @int radix@ = base to assume for data (or zero to guess) |
68 | * @const mptext_ops *ops@ = pointer to operations block |
69 | * @void *p@ = data for the operations block |
70 | * |
71 | * Returns: The integer read, or zero if it didn't work. |
72 | * |
73 | * Use: Reads an integer from some source. If the @radix@ is |
74 | * specified, the number is assumed to be given in that radix, |
75 | * with the letters `a' (either upper- or lower-case) upwards |
76 | * standing for digits greater than 9. Otherwise, base 10 is |
77 | * assumed unless the number starts with `0' (octal), `0x' (hex) |
78 | * or `nnn_' (base `nnn'). An arbitrary amount of whitespace |
79 | * before the number is ignored. |
80 | */ |
81 | |
82 | extern mp *mp_read(mp */*m*/, int /*radix*/, |
83 | const mptext_ops */*ops*/, void */*p*/); |
84 | |
85 | /* --- @mp_write@ --- * |
86 | * |
87 | * Arguments: @mp *m@ = pointer to a multi-precision integer |
88 | * @int radix@ = radix to use when writing the number out |
89 | * @const mptext_ops *ops@ = pointer to an operations block |
90 | * @void *p@ = data for the operations block |
91 | * |
92 | * Returns: Zero if it worked, nonzero otherwise. |
93 | * |
94 | * Use: Writes a large integer in textual form. |
95 | */ |
96 | |
97 | extern int mp_write(mp */*m*/, int /*radix*/, |
98 | const mptext_ops */*ops*/, void */*p*/); |
99 | |
100 | /*----- File I/O ----------------------------------------------------------*/ |
101 | |
102 | #include <stdio.h> |
103 | |
104 | /* --- Operations table --- * |
105 | * |
106 | * The @mptext_fileops@ expect the pointer argument to be a @FILE *@. |
107 | */ |
108 | |
109 | extern const mptext_ops mptext_fileops; |
110 | |
111 | /* --- Convenience functions --- */ |
112 | |
113 | extern mp *mp_readfile(mp */*m*/, FILE */*fp*/, int /*radix*/); |
114 | extern int mp_writefile(mp */*m*/, FILE */*fp*/, int /*radix*/); |
115 | |
116 | /*----- String I/O --------------------------------------------------------*/ |
117 | |
118 | /* --- Context format --- */ |
119 | |
120 | typedef struct mptext_stringctx { |
121 | char *buf; |
122 | char *lim; |
123 | } mptext_stringctx; |
124 | |
125 | /* --- Operations table --- */ |
126 | |
127 | extern const mptext_ops mptext_stringops; |
128 | |
129 | /* --- Convenience functions --- */ |
130 | |
131 | extern mp *mp_readstring(mp */*m*/, const char */*p*/, char **/*end*/, |
132 | int /*radix*/); |
133 | extern int mp_writestring(mp */*m*/, char */*p*/, size_t /*sz*/, |
134 | int /*radix*/); |
135 | |
136 | /*----- Dynamic string I/O ------------------------------------------------*/ |
137 | |
138 | #include <mLib/dstr.h> |
139 | |
140 | /* --- Context format --- */ |
141 | |
142 | typedef struct mptext_dstrctx { |
143 | dstr *d; |
144 | size_t i; |
145 | } mptext_dstrctx; |
146 | |
147 | /* --- Operations table --- */ |
148 | |
149 | extern const mptext_ops mptext_dstrops; |
150 | |
151 | /* --- Convenience functions --- */ |
152 | |
153 | extern mp *mp_readdstr(mp */*m*/, dstr */*d*/, size_t */*off*/, |
154 | int /*radix*/); |
155 | extern int mp_writedstr(mp */*m*/, dstr */*d*/, int /*radix*/); |
156 | |
157 | /*----- That's all, folks -------------------------------------------------*/ |
158 | |
159 | #ifdef __cplusplus |
160 | } |
161 | #endif |
162 | |
163 | #endif |