ermyth/src/ubase64.C

/*
 * ubase64.C: ircu base64 routines.
 *
 * Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team
 * Rights to this code are as documented in COPYING.
 *
 *
 * Portions of this file were derived from sources bearing the following license:
 * Rights to this code are documented in doc/pod/license.pod.
 * Copyright © 2005-2007 Atheme Project (http://www.atheme.org)
 */

static char const rcsid[] = "$Id: ubase64.C,v 1.4 2007-08-28 17:08:12 pippijn Exp $";

#include "atheme.h"

/*
 * base64touint() written 01/20/06 by jilles, for getting IP addresses.
 */

static const char ub64_alphabet[65] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789[]";
#define __ '\377'
static const char ub64_lookuptab[256] = {
  __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,       /* 0-15 */
  __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,       /* 16-31 */
  __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,       /* 32-47 */
  52, 53, 54, 55, 56, 57, 58, 59, 60, 61, __, __, __, __, __, __,       /* 48-63 */
  __, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 64-79 */
  15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 62, __, 63, __, __,       /* 80-95 */
  __, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,       /* 96-111 */
  41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, __, __, __, __, __,       /* 112-127 */
  __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
  __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
  __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
  __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
  __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
  __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
  __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
  __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __
};

#undef __

char const * const 
uinttobase64 (char *buf, uint64_t v, int64_t count)
{
  buf[count] = '\0';

  while (count >= 0)
    {
      buf[--count] = ub64_alphabet[v & 63];
      v >>= 6;
    }

  return buf;
}

unsigned int
base64touint (char *buf)
{
  int bits;
  unsigned int v = 0;
  int count = 6;

  while (--count >= 0 && (bits = ub64_lookuptab[255 & *buf++]) != '\377')
    v = v << 6 | bits;
  return v;
}

/* vim:cinoptions=>s,e0,n0,f0,{0,}0,^0,=s,ps,t0,c3,+s,(2s,us,)20,*30,gs,hs
 * vim:ts=8
 * vim:sw=8
 * vim:noexpandtab
 */
Revision:	1.5
Committed:	Sun Sep 16 18:54:45 2007 UTC (16 years, 8 months ago) by pippijn
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.4:	+7 -2 lines
Log Message:	#defines to enum
#	User	Rev	Content
1	pippijn	1.1	/*
2			* ubase64.C: ircu base64 routines.
3	pippijn	1.5	*
4			* Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team
5			* Rights to this code are as documented in COPYING.
6			*
7			*
8			* Portions of this file were derived from sources bearing the following license:
9	pippijn	1.2	* Rights to this code are documented in doc/pod/license.pod.
10	pippijn	1.4	* Copyright © 2005-2007 Atheme Project (http://www.atheme.org)
11	pippijn	1.1	*/
12
13	pippijn	1.5	static char const rcsid[] = "$Id: ubase64.C,v 1.4 2007-08-28 17:08:12 pippijn Exp $";
14	pippijn	1.1
15			#include "atheme.h"
16
17			/*
18			* base64touint() written 01/20/06 by jilles, for getting IP addresses.
19			*/
20
21			static const char ub64_alphabet[65] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789[]";
22			#define __ '\377'
23			static const char ub64_lookuptab[256] = {
24			__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, /* 0-15 */
25			__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, /* 16-31 */
26			__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, /* 32-47 */
27			52, 53, 54, 55, 56, 57, 58, 59, 60, 61, __, __, __, __, __, __, /* 48-63 */
28			__, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 64-79 */
29			15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 62, __, 63, __, __, /* 80-95 */
30			__, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, /* 96-111 */
31			41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, __, __, __, __, __, /* 112-127 */
32			__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
33			__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
34			__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
35			__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
36			__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
37			__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
38			__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
39			__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __
40			};
41
42			#undef __
43
44	pippijn	1.4	char const * const
45	pippijn	1.1	uinttobase64 (char *buf, uint64_t v, int64_t count)
46			{
47			buf[count] = '\0';
48
49			while (count >= 0)
50			{
51			buf[--count] = ub64_alphabet[v & 63];
52			v >>= 6;
53			}
54
55			return buf;
56			}
57
58			unsigned int
59			base64touint (char *buf)
60			{
61			int bits;
62			unsigned int v = 0;
63			int count = 6;
64
65			while (--count >= 0 && (bits = ub64_lookuptab[255 & *buf++]) != '\377')
66			v = v << 6 \| bits;
67			return v;
68			}
69
70			/* vim:cinoptions=>s,e0,n0,f0,{0,}0,^0,=s,ps,t0,c3,+s,(2s,us,)20,*30,gs,hs
71			* vim:ts=8
72			* vim:sw=8
73			* vim:noexpandtab
74			*/