d3409d5e |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: mptext.h,v 1.1 1999/11/17 18:02:16 mdw Exp $ |
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 $ |
33 | * Revision 1.1 1999/11/17 18:02:16 mdw |
34 | * New multiprecision integer arithmetic suite. |
35 | * |
36 | */ |
37 | |
38 | #ifndef MPTEXT_H |
39 | #define MPTEXT_H |
40 | |
41 | #ifdef __cplusplus |
42 | extern "C" { |
43 | #endif |
44 | |
45 | /*----- Header files ------------------------------------------------------*/ |
46 | |
47 | #ifndef MP_H |
48 | # include "mp.h" |
49 | #endif |
50 | |
51 | /*----- Data structures ---------------------------------------------------*/ |
52 | |
53 | typedef struct mptext_ops { |
54 | int (*get)(void */*p*/); |
55 | void (*unget)(int /*ch*/, void */*p*/); |
56 | int (*put)(char */*s*/, size_t /*len*/, void */*p*/); |
57 | } mptext_ops; |
58 | |
59 | /*----- Functions provided ------------------------------------------------*/ |
60 | |
61 | /* --- @mp_read@ --- * |
62 | * |
63 | * Arguments: @mp *m@ = destination multiprecision number |
64 | * @int radix@ = base to assume for data (or zero to guess) |
65 | * @const mptext_ops *ops@ = pointer to operations block |
66 | * @void *p@ = data for the operations block |
67 | * |
68 | * Returns: The integer read, or zero if it didn't work. |
69 | * |
70 | * Use: Reads an integer from some source. If the @radix@ is |
71 | * specified, the number is assumed to be given in that radix, |
72 | * with the letters `a' (either upper- or lower-case) upwards |
73 | * standing for digits greater than 9. Otherwise, base 10 is |
74 | * assumed unless the number starts with `0' (octal), `0x' (hex) |
75 | * or `nnn_' (base `nnn'). An arbitrary amount of whitespace |
76 | * before the number is ignored. |
77 | */ |
78 | |
79 | extern mp *mp_read(mp */*m*/, int /*radix*/, |
80 | const mptext_ops */*ops*/, void */*p*/); |
81 | |
82 | /* --- @mp_write@ --- * |
83 | * |
84 | * Arguments: @mp *m@ = pointer to a multi-precision integer |
85 | * @int radix@ = radix to use when writing the number out |
86 | * @const mptext_ops *ops@ = pointer to an operations block |
87 | * @void *p@ = data for the operations block |
88 | * |
89 | * Returns: Zero if it worked, nonzero otherwise. |
90 | * |
91 | * Use: Writes a large integer in textual form. |
92 | */ |
93 | |
94 | extern int mp_write(mp */*m*/, int /*radix*/, |
95 | const mptext_ops */*ops*/, void */*p*/); |
96 | |
97 | /*----- File I/O ----------------------------------------------------------*/ |
98 | |
99 | #include <stdio.h> |
100 | |
101 | /* --- Operations table --- * |
102 | * |
103 | * The @mptext_fileops@ expect the pointer argument to be a @FILE *@. |
104 | */ |
105 | |
106 | extern const mptext_ops mptext_fileops; |
107 | |
108 | /* --- Convenience functions --- */ |
109 | |
110 | extern mp *mp_readfile(mp */*m*/, FILE */*fp*/, int /*radix*/); |
111 | extern int mp_writefile(mp */*m*/, FILE */*fp*/, int /*radix*/); |
112 | |
113 | /*----- String I/O --------------------------------------------------------*/ |
114 | |
115 | /* --- Context format --- */ |
116 | |
117 | typedef struct mptext_stringctx { |
118 | char *buf; |
119 | char *lim; |
120 | } mptext_stringctx; |
121 | |
122 | /* --- Operations table --- */ |
123 | |
124 | extern const mptext_ops mptext_stringops; |
125 | |
126 | /* --- Convenience functions --- */ |
127 | |
128 | extern mp *mp_readstring(mp */*m*/, const char */*p*/, char **/*end*/, |
129 | int /*radix*/); |
130 | extern int mp_writestring(mp */*m*/, char */*p*/, size_t /*sz*/, |
131 | int /*radix*/); |
132 | |
133 | /*----- Dynamic string I/O ------------------------------------------------*/ |
134 | |
135 | #include <mLib/dstr.h> |
136 | |
137 | /* --- Context format --- */ |
138 | |
139 | typedef struct mptext_dstrctx { |
140 | dstr *d; |
141 | size_t i; |
142 | } mptext_dstrctx; |
143 | |
144 | /* --- Operations table --- */ |
145 | |
146 | extern const mptext_ops mptext_dstrops; |
147 | |
148 | /* --- Convenience functions --- */ |
149 | |
150 | extern mp *mp_readdstr(mp */*m*/, dstr */*d*/, size_t */*off*/, |
151 | int /*radix*/); |
152 | extern int mp_writedstr(mp */*m*/, dstr */*d*/, int /*radix*/); |
153 | |
154 | /*----- That's all, folks -------------------------------------------------*/ |
155 | |
156 | #ifdef __cplusplus |
157 | } |
158 | #endif |
159 | |
160 | #endif |