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/* SPDX-License-Identifier: ISC */
/*
* Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
* Copyright (C) 2004, 2005, 2007, 2009 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1998-2001, 2003 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <rtems/score/io.h>
static const char base64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
static void _IO_Put(int c, void *arg, IO_Put_char put_char)
{
(*put_char)(c, arg);
}
int
_IO_Base64(IO_Put_char put_char, void *arg, const void *src, size_t srclen,
const char *wordbreak, int wordlen)
{
unsigned int loops = 0;
const unsigned char *in = src;
int out = 0;
if (wordlen < 4) {
wordlen = 4;
}
while (srclen > 2) {
_IO_Put(base64[(in[0]>>2)&0x3f], arg, put_char);
_IO_Put(base64[((in[0]<<4)&0x30)|
((in[1]>>4)&0x0f)], arg, put_char);
_IO_Put(base64[((in[1]<<2)&0x3c)|
((in[2]>>6)&0x03)], arg, put_char);
_IO_Put(base64[in[2]&0x3f], arg, put_char);
in += 3;
srclen -= 3;
out += 4;
loops++;
if (srclen != 0 &&
(int)((loops + 1) * 4) >= wordlen)
{
const char *w = wordbreak;
loops = 0;
while (*w != '\0') {
_IO_Put(*w, arg, put_char);
++w;
++out;
}
}
}
if (srclen == 2) {
_IO_Put(base64[(in[0]>>2)&0x3f], arg, put_char);
_IO_Put(base64[((in[0]<<4)&0x30)|
((in[1]>>4)&0x0f)], arg, put_char);
_IO_Put(base64[((in[1]<<2)&0x3c)], arg, put_char);
_IO_Put('=', arg, put_char);
out += 4;
} else if (srclen == 1) {
_IO_Put(base64[(in[0]>>2)&0x3f], arg, put_char);
_IO_Put(base64[((in[0]<<4)&0x30)], arg, put_char);
_IO_Put('=', arg, put_char);
_IO_Put('=', arg, put_char);
out += 4;
}
return out;
}
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