3 * Hexadecimal encoding and decoding
5 * (c) 2001 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of the mLib utilities library.
12 * mLib is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU Library General Public License as
14 * published by the Free Software Foundation; either version 2 of the
15 * License, or (at your option) any later version.
17 * mLib is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Library General Public License for more details.
22 * You should have received a copy of the GNU Library General Public
23 * License along with mLib; if not, write to the Free
24 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
35 /*----- Header files ------------------------------------------------------*/
45 /*----- Data structures ---------------------------------------------------*/
47 typedef struct hex_ctx
{
48 unsigned long acc
; /* Accumulator for output data */
49 unsigned qsz
; /* Length of data queued */
50 unsigned lnlen
; /* Length of the current line */
51 const char *indent
; /* Newline-and-indent string */
52 unsigned maxline
; /* Maximum permitted line length */
55 /*----- Functions provided ------------------------------------------------*/
57 /* --- @hex_encode@ --- *
59 * Arguments: @hex_ctx *ctx@ = pointer to a context block
60 * @const void *p@ = pointer to a source buffer
61 * @size_t sz@ = size of the source buffer
62 * @dstr *d@ = pointer to destination string
66 * Use: Encodes a binary string in hex.
69 extern void hex_encode(hex_ctx */
*ctx*/
, const void */
*p*/
, size_t /*sz*/,
72 /* --- @hex_decode@ --- *
74 * Arguments: @hex_ctx *ctx@ = pointer to a context block
75 * @const void *p@ = pointer to a source buffer
76 * @size_t sz@ = size of the source buffer
77 * @dstr *d@ = pointer to destination string
81 * Use: Decodes a binary string in hex. Pass in a null source
82 * pointer when you thing you've finished.
85 extern void hex_decode(hex_ctx */
*ctx*/
, const void */
*p*/
, size_t /*sz*/,
88 /* --- @hex_init@ --- *
90 * Arguments: @hex_ctx *ctx@ = pointer to context block to initialize
94 * Use: Initializes a hex context properly.
97 extern void hex_init(hex_ctx */
*ctx*/
);
99 /*----- Codec object interface --------------------------------------------*/
101 extern const codec_class hex_class
;
103 /*----- That's all, folks -------------------------------------------------*/