2
This file is part of PulseAudio.
4
Copyright 2008 Colin Guthrie
6
PulseAudio is free software; you can redistribute it and/or modify
7
it under the terms of the GNU Lesser General Public License as published
8
by the Free Software Foundation; either version 2.1 of the License,
9
or (at your option) any later version.
11
PulseAudio is distributed in the hope that it will be useful, but
12
WITHOUT ANY WARRANTY; without even the implied warranty of
13
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14
General Public License for more details.
16
You should have received a copy of the GNU Lesser General Public License
17
along with PulseAudio; if not, write to the Free Software
18
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
23
This file was originally inspired by a file developed by
24
Kungliga Tekniska H�gskolan
34
#include <pulse/xmalloc.h>
38
static const char base64_chars[] =
39
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
41
static int pos(char c)
43
if (c >= 'A' && c <= 'Z') return c - 'A' + 0;
44
if (c >= 'a' && c <= 'z') return c - 'a' + 26;
45
if (c >= '0' && c <= '9') return c - '0' + 52;
46
if (c == '+') return 62;
47
if (c == '/') return 63;
51
int pa_base64_encode(const void *data, int size, char **str)
56
const unsigned char *q;
58
p = s = pa_xnew(char, size * 4 / 3 + 4);
59
q = (const unsigned char *) data;
61
for (i = 0; i < size;) {
71
p[0] = base64_chars[(c & 0x00fc0000) >> 18];
72
p[1] = base64_chars[(c & 0x0003f000) >> 12];
73
p[2] = base64_chars[(c & 0x00000fc0) >> 6];
74
p[3] = base64_chars[(c & 0x0000003f) >> 0];
86
#define DECODE_ERROR 0xffffffff
88
static unsigned int token_decode(const char *token)
93
if (strlen(token) < 4)
95
for (i = 0; i < 4; i++) {
102
int lpos = pos(token[i]);
110
return (marker << 24) | val;
113
int pa_base64_decode(const char *str, void *data)
119
for (p = str; *p && (*p == '=' || strchr(base64_chars, *p)); p += 4) {
120
unsigned int val = token_decode(p);
121
unsigned int marker = (val >> 24) & 0xff;
122
if (val == DECODE_ERROR)
124
*q++ = (val >> 16) & 0xff;
126
*q++ = (val >> 8) & 0xff;
130
return q - (unsigned char *) data;