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/* GStreamer
* Copyright (C) <2007> Mike Smith <msmith@xiph.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "base64.h"
static char base64table[64] = {
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
'P',
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e',
'f',
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u',
'v',
'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'
};
/* This isn't efficient, but it doesn't need to be */
gchar *
util_base64_encode (gchar * data, gint len)
{
gchar *out = g_malloc (len * 4 / 3 + 4);
gchar *result = out;
int chunk;
while (len > 0) {
chunk = (len > 3) ? 3 : len;
*out++ = base64table[(*data & 0xFC) >> 2];
*out++ = base64table[((*data & 0x03) << 4) | ((*(data + 1) & 0xF0) >> 4)];
switch (chunk) {
case 3:
*out++ =
base64table[((*(data + 1) & 0x0F) << 2) | ((*(data +
2) & 0xC0) >> 6)];
*out++ = base64table[(*(data + 2)) & 0x3F];
break;
case 2:
*out++ = base64table[((*(data + 1) & 0x0F) << 2)];
*out++ = '=';
break;
case 1:
*out++ = '=';
*out++ = '=';
break;
}
data += chunk;
len -= chunk;
}
*out = 0;
return result;
}
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