#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mbfilter.h"
#include "mbfilter_qprint.h"
#include "unicode_prop.h"
static const char *mbfl_encoding_qprint_aliases[] = {"qprint", NULL};
const mbfl_encoding mbfl_encoding_qprint = {
mbfl_no_encoding_qprint,
"Quoted-Printable",
"Quoted-Printable",
(const char *(*)[])&mbfl_encoding_qprint_aliases,
NULL,
MBFL_ENCTYPE_ENC_STRM | MBFL_ENCTYPE_GL_UNSAFE
};
const struct mbfl_convert_vtbl vtbl_8bit_qprint = {
mbfl_no_encoding_8bit,
mbfl_no_encoding_qprint,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_qprintenc,
mbfl_filt_conv_qprintenc_flush };
const struct mbfl_convert_vtbl vtbl_qprint_8bit = {
mbfl_no_encoding_qprint,
mbfl_no_encoding_8bit,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_qprintdec,
mbfl_filt_conv_qprintdec_flush };
#define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
int mbfl_filt_conv_qprintenc(int c, mbfl_convert_filter *filter)
{
int s, n;
switch (filter->status & 0xff) {
case 0:
filter->cache = c;
filter->status++;
break;
default:
s = filter->cache;
filter->cache = c;
n = (filter->status & 0xff00) >> 8;
if (s == 0) {
CK((*filter->output_function)(s, filter->data));
filter->status &= ~0xff00;
break;
}
if ((filter->status & MBFL_QPRINT_STS_MIME_HEADER) == 0) {
if (s == 0x0a || (s == 0x0d && c != 0x0a)) {
CK((*filter->output_function)(0x0d, filter->data));
CK((*filter->output_function)(0x0a, filter->data));
filter->status &= ~0xff00;
break;
} else if (s == 0x0d) {
break;
}
}
if ((filter->status & MBFL_QPRINT_STS_MIME_HEADER) == 0 && n >= 72) {
CK((*filter->output_function)(0x3d, filter->data));
CK((*filter->output_function)(0x0d, filter->data));
CK((*filter->output_function)(0x0a, filter->data));
filter->status &= ~0xff00;
}
if (s <= 0 || s >= 0x80 || s == 0x3d
|| ((filter->status & MBFL_QPRINT_STS_MIME_HEADER) != 0 &&
(mbfl_charprop_table[s] & MBFL_CHP_MMHQENC) != 0)) {
CK((*filter->output_function)(0x3d, filter->data));
n = (s >> 4) & 0xf;
if (n < 10) {
n += 48;
} else {
n += 55;
}
CK((*filter->output_function)(n, filter->data));
n = s & 0xf;
if (n < 10) {
n += 48;
} else {
n += 55;
}
CK((*filter->output_function)(n, filter->data));
if ((filter->status & MBFL_QPRINT_STS_MIME_HEADER) == 0) {
filter->status += 0x300;
}
} else {
CK((*filter->output_function)(s, filter->data));
if ((filter->status & MBFL_QPRINT_STS_MIME_HEADER) == 0) {
filter->status += 0x100;
}
}
break;
}
return c;
}
int mbfl_filt_conv_qprintenc_flush(mbfl_convert_filter *filter)
{
(*filter->filter_function)('\0', filter);
filter->status &= ~0xffff;
filter->cache = 0;
return 0;
}
int mbfl_filt_conv_qprintdec(int c, mbfl_convert_filter *filter)
{
int n, m;
static int hex2code_map[] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1,
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
switch (filter->status) {
case 1:
if (hex2code_map[c & 0xff] >= 0) {
filter->cache = c;
filter->status = 2;
} else if (c == 0x0d) {
filter->status = 3;
} else if (c == 0x0a) {
filter->status = 0;
} else {
CK((*filter->output_function)(0x3d, filter->data));
CK((*filter->output_function)(c, filter->data));
filter->status = 0;
}
break;
case 2:
m = hex2code_map[c & 0xff];
if (m < 0) {
CK((*filter->output_function)(0x3d, filter->data));
CK((*filter->output_function)(filter->cache, filter->data));
n = c;
} else {
n = hex2code_map[filter->cache] << 4 | m;
}
CK((*filter->output_function)(n, filter->data));
filter->status = 0;
break;
case 3:
if (c != 0x0a) {
CK((*filter->output_function)(c, filter->data));
}
filter->status = 0;
break;
default:
if (c == 0x3d) {
filter->status = 1;
} else {
CK((*filter->output_function)(c, filter->data));
}
break;
}
return c;
}
int mbfl_filt_conv_qprintdec_flush(mbfl_convert_filter *filter)
{
int status, cache;
status = filter->status;
cache = filter->cache;
filter->status = 0;
filter->cache = 0;
if (status == 1) {
CK((*filter->output_function)(0x3d, filter->data));
} else if (status == 2) {
CK((*filter->output_function)(0x3d, filter->data));
CK((*filter->output_function)(cache, filter->data));
}
return 0;
}