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1 | /* -*-c-*- |
2 | * |
8656dc50 |
3 | * $Id: hex.h,v 1.2 2004/04/08 01:36:11 mdw Exp $ |
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4 | * |
5 | * Hexadecimal encoding and decoding |
6 | * |
7 | * (c) 2001 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of the mLib utilities library. |
13 | * |
14 | * mLib 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 | * mLib 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 mLib; 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 MLIB_HEX_H |
31 | #define MLIB_HEX_H |
32 | |
33 | #ifdef __cplusplus |
34 | extern "C" { |
35 | #endif |
36 | |
37 | /*----- Header files ------------------------------------------------------*/ |
38 | |
39 | #include "dstr.h" |
40 | |
41 | /*----- Data structures ---------------------------------------------------*/ |
42 | |
43 | typedef struct hex_ctx { |
44 | unsigned long acc; /* Accumulator for output data */ |
45 | unsigned qsz; /* Length of data queued */ |
46 | unsigned lnlen; /* Length of the current line */ |
47 | const char *indent; /* Newline-and-indent string */ |
48 | unsigned maxline; /* Maximum permitted line length */ |
49 | } hex_ctx; |
50 | |
51 | /*----- Functions provided ------------------------------------------------*/ |
52 | |
53 | /* --- @hex_encode@ --- * |
54 | * |
55 | * Arguments: @hex_ctx *ctx@ = pointer to a context block |
56 | * @const void *p@ = pointer to a source buffer |
57 | * @size_t sz@ = size of the source buffer |
58 | * @dstr *d@ = pointer to destination string |
59 | * |
60 | * Returns: --- |
61 | * |
62 | * Use: Encodes a binary string in hex. |
63 | */ |
64 | |
65 | extern void hex_encode(hex_ctx */*ctx*/, const void */*p*/, size_t /*sz*/, |
66 | dstr */*d*/); |
67 | |
68 | /* --- @hex_decode@ --- * |
69 | * |
70 | * Arguments: @hex_ctx *ctx@ = pointer to a context block |
71 | * @const void *p@ = pointer to a source buffer |
72 | * @size_t sz@ = size of the source buffer |
73 | * @dstr *d@ = pointer to destination string |
74 | * |
75 | * Returns: --- |
76 | * |
77 | * Use: Decodes a binary string in hex. Pass in a null source |
78 | * pointer when you thing you've finished. |
79 | */ |
80 | |
81 | extern void hex_decode(hex_ctx */*ctx*/, const void */*p*/, size_t /*sz*/, |
82 | dstr */*d*/); |
83 | |
84 | /* --- @hex_init@ --- * |
85 | * |
86 | * Arguments: @hex_ctx *ctx@ = pointer to context block to initialize |
87 | * |
88 | * Returns: --- |
89 | * |
90 | * Use: Initializes a hex context properly. |
91 | */ |
92 | |
93 | extern void hex_init(hex_ctx */*ctx*/); |
94 | |
95 | /*----- That's all, folks -------------------------------------------------*/ |
96 | |
97 | #ifdef __cplusplus |
98 | } |
99 | #endif |
100 | |
101 | #endif |