/* [<][>][^][v][top][bottom][index][help] */
DEFINITIONS
This source file includes following definitions.
- mbfl_filt_conv_uudec
/*
* "streamable kanji code filter and converter"
* Copyright (c) 1998-2002 HappySize, Inc. All rights reserved.
*
* LICENSE NOTICES
*
* This file is part of "streamable kanji code filter and converter",
* which is distributed under the terms of GNU Lesser General Public
* License (version 2) as published by the Free Software Foundation.
*
* This software 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with "streamable kanji code filter and converter";
* if not, write to the Free Software Foundation, Inc., 59 Temple Place,
* Suite 330, Boston, MA 02111-1307 USA
*
* The author of this file:
*
*/
/*
* The source code included in this files was separated from mbfilter.c
* by moriyoshi koizumi <moriyoshi@php.net> on 4 dec 2002.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mbfilter.h"
#include "mbfilter_uuencode.h"
const mbfl_encoding mbfl_encoding_uuencode = {
mbfl_no_encoding_uuencode,
"UUENCODE",
"x-uuencode",
NULL,
NULL,
MBFL_ENCTYPE_SBCS
};
const struct mbfl_convert_vtbl vtbl_uuencode_8bit = {
mbfl_no_encoding_uuencode,
mbfl_no_encoding_8bit,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_uudec,
mbfl_filt_conv_common_flush
};
#define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
/* uuencode => any */
#define UUDEC(c) (char)(((c)-' ')&077)
static const char * uuenc_begin_text = "begin ";
enum { uudec_state_ground=0, uudec_state_inbegin,
uudec_state_until_newline,
uudec_state_size, uudec_state_a, uudec_state_b, uudec_state_c, uudec_state_d,
uudec_state_skip_newline};
int mbfl_filt_conv_uudec(int c, mbfl_convert_filter * filter)
{
int n;
switch(filter->status) {
case uudec_state_ground:
/* looking for "begin 0666 filename\n" line */
if (filter->cache == 0 && c == 'b')
{
filter->status = uudec_state_inbegin;
filter->cache = 1; /* move to 'e' */
}
else if (c == '\n')
filter->cache = 0;
else
filter->cache++;
break;
case uudec_state_inbegin:
if (uuenc_begin_text[filter->cache++] != c) {
/* doesn't match pattern */
filter->status = uudec_state_ground;
break;
}
if (filter->cache == 5)
{
/* thats good enough - wait for a newline */
filter->status = uudec_state_until_newline;
filter->cache = 0;
}
break;
case uudec_state_until_newline:
if (c == '\n')
filter->status = uudec_state_size;
break;
case uudec_state_size:
/* get "size" byte */
n = UUDEC(c);
filter->cache = n << 24;
filter->status = uudec_state_a;
break;
case uudec_state_a:
/* get "a" byte */
n = UUDEC(c);
filter->cache |= (n << 16);
filter->status = uudec_state_b;
break;
case uudec_state_b:
/* get "b" byte */
n = UUDEC(c);
filter->cache |= (n << 8);
filter->status = uudec_state_c;
break;
case uudec_state_c:
/* get "c" byte */
n = UUDEC(c);
filter->cache |= n;
filter->status = uudec_state_d;
break;
case uudec_state_d:
/* get "d" byte */
{
int A, B, C, D = UUDEC(c);
A = (filter->cache >> 16) & 0xff;
B = (filter->cache >> 8) & 0xff;
C = (filter->cache) & 0xff;
n = (filter->cache >> 24) & 0xff;
if (n-- > 0)
CK((*filter->output_function)( (A << 2) | (B >> 4), filter->data));
if (n-- > 0)
CK((*filter->output_function)( (B << 4) | (C >> 2), filter->data));
if (n-- > 0)
CK((*filter->output_function)( (C << 6) | D, filter->data));
filter->cache = n << 24;
if (n == 0)
filter->status = uudec_state_skip_newline; /* skip next byte (newline) */
else
filter->status = uudec_state_a; /* go back to fetch "A" byte */
}
break;
case uudec_state_skip_newline:
/* skip newline */
filter->status = uudec_state_size;
}
return c;
}