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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: mptext.h,v 1.7 2004/04/08 01:36:15 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 | |
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30 | #ifndef CATACOMB_MPTEXT_H |
31 | #define CATACOMB_MPTEXT_H |
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32 | |
33 | #ifdef __cplusplus |
34 | extern "C" { |
35 | #endif |
36 | |
37 | /*----- Header files ------------------------------------------------------*/ |
38 | |
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39 | #ifndef CATACOMB_MP_H |
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40 | # include "mp.h" |
41 | #endif |
42 | |
43 | /*----- Data structures ---------------------------------------------------*/ |
44 | |
45 | typedef struct mptext_ops { |
46 | int (*get)(void */*p*/); |
47 | void (*unget)(int /*ch*/, void */*p*/); |
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48 | int (*put)(const char */*s*/, size_t /*len*/, void */*p*/); |
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49 | } mptext_ops; |
50 | |
51 | /*----- Functions provided ------------------------------------------------*/ |
52 | |
53 | /* --- @mp_read@ --- * |
54 | * |
55 | * Arguments: @mp *m@ = destination multiprecision number |
56 | * @int radix@ = base to assume for data (or zero to guess) |
57 | * @const mptext_ops *ops@ = pointer to operations block |
58 | * @void *p@ = data for the operations block |
59 | * |
60 | * Returns: The integer read, or zero if it didn't work. |
61 | * |
62 | * Use: Reads an integer from some source. If the @radix@ is |
63 | * specified, the number is assumed to be given in that radix, |
64 | * with the letters `a' (either upper- or lower-case) upwards |
65 | * standing for digits greater than 9. Otherwise, base 10 is |
66 | * assumed unless the number starts with `0' (octal), `0x' (hex) |
67 | * or `nnn_' (base `nnn'). An arbitrary amount of whitespace |
68 | * before the number is ignored. |
69 | */ |
70 | |
71 | extern mp *mp_read(mp */*m*/, int /*radix*/, |
72 | const mptext_ops */*ops*/, void */*p*/); |
73 | |
74 | /* --- @mp_write@ --- * |
75 | * |
76 | * Arguments: @mp *m@ = pointer to a multi-precision integer |
77 | * @int radix@ = radix to use when writing the number out |
78 | * @const mptext_ops *ops@ = pointer to an operations block |
79 | * @void *p@ = data for the operations block |
80 | * |
81 | * Returns: Zero if it worked, nonzero otherwise. |
82 | * |
83 | * Use: Writes a large integer in textual form. |
84 | */ |
85 | |
86 | extern int mp_write(mp */*m*/, int /*radix*/, |
87 | const mptext_ops */*ops*/, void */*p*/); |
88 | |
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89 | /* --- @mptext_len@ --- * |
90 | * |
91 | * Arguments: @mp *x@ = number to work on |
92 | * @int r@ = radix the number will be expressed in |
93 | * |
94 | * Returns: The number of digits needed to represent the number in the |
95 | * given base. This will not include space for a leading sign |
96 | * (use @MP_ISNEG@ to check that, or just add one on for luck); |
97 | * neither will it add space for a terminating null. In general |
98 | * the answer will be an overestimate. |
99 | */ |
100 | |
101 | extern size_t mptext_len(mp */*x*/, int /*r*/); |
102 | |
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103 | /*----- File I/O ----------------------------------------------------------*/ |
104 | |
105 | #include <stdio.h> |
106 | |
107 | /* --- Operations table --- * |
108 | * |
109 | * The @mptext_fileops@ expect the pointer argument to be a @FILE *@. |
110 | */ |
111 | |
112 | extern const mptext_ops mptext_fileops; |
113 | |
114 | /* --- Convenience functions --- */ |
115 | |
116 | extern mp *mp_readfile(mp */*m*/, FILE */*fp*/, int /*radix*/); |
117 | extern int mp_writefile(mp */*m*/, FILE */*fp*/, int /*radix*/); |
118 | |
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119 | #define MP_DOFPRINTFR(fp, args, m, r) do { \ |
120 | fprintf args; \ |
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121 | if (m) \ |
122 | mp_writefile(m, fp, r); \ |
123 | else \ |
124 | fputs("<null>", fp); \ |
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125 | fputc('\n', fp); \ |
126 | } while (0) |
127 | |
128 | #define MP_DOFPRINTR(fp, name, m, r) \ |
129 | MP_DOFPRINTFR(fp, (fp, "%s = ", name), m, r) |
130 | |
131 | #define MP_PRINT(name, m) MP_DOFPRINTR(stdout, name, m, 10) |
132 | #define MP_EPRINT(name, m) MP_DOFPRINTR(stderr, name, m, 10) |
133 | #define MP_PRINTX(name, m) MP_DOFPRINTR(stdout, name, m, 16) |
134 | #define MP_EPRINTX(name, m) MP_DOFPRINTR(stderr, name, m, 16) |
135 | |
136 | #define MP_FPRINTF(fp, args, m) MP_DOFPRINTFR(fp, args, m, 10) |
137 | #define MP_FPRINTFX(fp, args, m) MP_DOFPRINTFR(fp, args, m, 16) |
138 | |
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139 | /*----- String I/O --------------------------------------------------------*/ |
140 | |
141 | /* --- Context format --- */ |
142 | |
143 | typedef struct mptext_stringctx { |
144 | char *buf; |
145 | char *lim; |
146 | } mptext_stringctx; |
147 | |
148 | /* --- Operations table --- */ |
149 | |
150 | extern const mptext_ops mptext_stringops; |
151 | |
152 | /* --- Convenience functions --- */ |
153 | |
154 | extern mp *mp_readstring(mp */*m*/, const char */*p*/, char **/*end*/, |
155 | int /*radix*/); |
156 | extern int mp_writestring(mp */*m*/, char */*p*/, size_t /*sz*/, |
157 | int /*radix*/); |
158 | |
159 | /*----- Dynamic string I/O ------------------------------------------------*/ |
160 | |
161 | #include <mLib/dstr.h> |
162 | |
163 | /* --- Context format --- */ |
164 | |
165 | typedef struct mptext_dstrctx { |
166 | dstr *d; |
167 | size_t i; |
168 | } mptext_dstrctx; |
169 | |
170 | /* --- Operations table --- */ |
171 | |
172 | extern const mptext_ops mptext_dstrops; |
173 | |
174 | /* --- Convenience functions --- */ |
175 | |
176 | extern mp *mp_readdstr(mp */*m*/, dstr */*d*/, size_t */*off*/, |
177 | int /*radix*/); |
178 | extern int mp_writedstr(mp */*m*/, dstr */*d*/, int /*radix*/); |
179 | |
180 | /*----- That's all, folks -------------------------------------------------*/ |
181 | |
182 | #ifdef __cplusplus |
183 | } |
184 | #endif |
185 | |
186 | #endif |