ermyth/src/ubase64.C

/*
 * ubase64.C: ircu base64 routines.
 * Rights to this code are documented in doc/LICENSE.
 *
 * Copyright © 2005-2007 Atheme Project (http://www.atheme.org)
 */

static char const rcsid[] = "$Id";

#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 __

const char *
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:	1.1
Committed:	Thu Jul 19 08:24:59 2007 UTC (16 years, 10 months ago) by pippijn
Content type:	text/plain
Branch:	MAIN
Log Message:	initial import. the most important changes since Atheme are: - fixed many memory leaks - fixed many bugs - converted to C++ and use more STL containers - added a (not very enhanced yet) perl module - greatly improved XML-RPC speed - added a JSON-RPC module with code from json-cpp - added a valgrind memcheck module to operserv - added a more object oriented base64 implementation - added a specialised unit test framework - improved stability - use gettimeofday() if available - reworked adding/removing commands - MemoServ IGNORE DEL can now remove indices
#	Content
1	/*
2	* ubase64.C: ircu base64 routines.
3	* Rights to this code are documented in doc/LICENSE.
4	*
5	* Copyright © 2005-2007 Atheme Project (http://www.atheme.org)
6	*/
7
8	static char const rcsid[] = "$Id";
9
10	#include "atheme.h"
11
12	/*
13	* base64touint() written 01/20/06 by jilles, for getting IP addresses.
14	*/
15
16	static const char ub64_alphabet[65] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789[]";
17	#define __ '\377'
18	static const char ub64_lookuptab[256] = {
19	__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, /* 0-15 */
20	__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, /* 16-31 */
21	__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, /* 32-47 */
22	52, 53, 54, 55, 56, 57, 58, 59, 60, 61, __, __, __, __, __, __, /* 48-63 */
23	__, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 64-79 */
24	15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 62, __, 63, __, __, /* 80-95 */
25	__, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, /* 96-111 */
26	41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, __, __, __, __, __, /* 112-127 */
27	__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
28	__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
29	__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
30	__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
31	__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
32	__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
33	__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
34	__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __
35	};
36
37	#undef __
38
39	const char *
40	uinttobase64 (char *buf, uint64_t v, int64_t count)
41	{
42	buf[count] = '\0';
43
44	while (count >= 0)
45	{
46	buf[--count] = ub64_alphabet[v & 63];
47	v >>= 6;
48	}
49
50	return buf;
51	}
52
53	unsigned int
54	base64touint (char *buf)
55	{
56	int bits;
57	unsigned int v = 0;
58	int count = 6;
59
60	while (--count >= 0 && (bits = ub64_lookuptab[255 & *buf++]) != '\377')
61	v = v << 6 \| bits;
62	return v;
63	}
64
65	/* vim:cinoptions=>s,e0,n0,f0,{0,}0,^0,=s,ps,t0,c3,+s,(2s,us,)20,*30,gs,hs
66	* vim:ts=8
67	* vim:sw=8
68	* vim:noexpandtab
69	*/