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handler.c
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handler.c
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/*
* Copyright (C) 1996-2000,2002,2010 Michael R. Elkins <me@mutt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include "mutt.h"
#include "mutt_curses.h"
#include "rfc1524.h"
#include "keymap.h"
#include "mime.h"
#include "copy.h"
#include "charset.h"
#include "mutt_crypt.h"
#include "rfc3676.h"
#define BUFI_SIZE 1000
#define BUFO_SIZE 2000
typedef int (*handler_t) (BODY *, STATE *);
const int Index_hex[128] = {
-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
};
const int Index_64[128] = {
-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,-1,62, -1,-1,-1,63,
52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1,-1,-1,-1,
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11,12,13,14,
15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1,
-1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1
};
static void state_prefix_put (const char *d, size_t dlen, STATE *s)
{
if (s->prefix)
while (dlen--)
state_prefix_putc (*d++, s);
else
fwrite (d, dlen, 1, s->fpout);
}
static void mutt_convert_to_state(iconv_t cd, char *bufi, size_t *l, STATE *s)
{
char bufo[BUFO_SIZE];
ICONV_CONST char *ib;
char *ob;
size_t ibl, obl;
if (!bufi)
{
if (cd != (iconv_t)(-1))
{
ob = bufo, obl = sizeof (bufo);
iconv (cd, 0, 0, &ob, &obl);
if (ob != bufo)
state_prefix_put (bufo, ob - bufo, s);
}
return;
}
if (cd == (iconv_t)(-1))
{
state_prefix_put (bufi, *l, s);
*l = 0;
return;
}
ib = bufi, ibl = *l;
for (;;)
{
ob = bufo, obl = sizeof (bufo);
mutt_iconv (cd, &ib, &ibl, &ob, &obl, 0, "?");
if (ob == bufo)
break;
state_prefix_put (bufo, ob - bufo, s);
}
memmove (bufi, ib, ibl);
*l = ibl;
}
static void mutt_decode_xbit (STATE *s, long len, int istext, iconv_t cd)
{
int c, ch;
char bufi[BUFI_SIZE];
size_t l = 0;
if (istext)
{
state_set_prefix(s);
while ((c = fgetc(s->fpin)) != EOF && len--)
{
if(c == '\r' && len)
{
if((ch = fgetc(s->fpin)) == '\n')
{
c = ch;
len--;
}
else
ungetc(ch, s->fpin);
}
bufi[l++] = c;
if (l == sizeof (bufi))
mutt_convert_to_state (cd, bufi, &l, s);
}
mutt_convert_to_state (cd, bufi, &l, s);
mutt_convert_to_state (cd, 0, 0, s);
state_reset_prefix (s);
}
else
mutt_copy_bytes (s->fpin, s->fpout, len);
}
static int qp_decode_triple (char *s, char *d)
{
/* soft line break */
if (*s == '=' && !(*(s+1)))
return 1;
/* quoted-printable triple */
if (*s == '=' &&
isxdigit ((unsigned char) *(s+1)) &&
isxdigit ((unsigned char) *(s+2)))
{
*d = (hexval (*(s+1)) << 4) | hexval (*(s+2));
return 0;
}
/* something else */
return -1;
}
static void qp_decode_line (char *dest, char *src, size_t *l,
int last)
{
char *d, *s;
char c = 0;
int kind = -1;
int soft = 0;
/* decode the line */
for (d = dest, s = src; *s;)
{
switch ((kind = qp_decode_triple (s, &c)))
{
case 0: *d++ = c; s += 3; break; /* qp triple */
case -1: *d++ = *s++; break; /* single character */
case 1: soft = 1; s++; break; /* soft line break */
}
}
if (!soft && last == '\n')
{
/* neither \r nor \n as part of line-terminating CRLF
* may be qp-encoded, so remove \r and \n-terminate;
* see RfC2045, sect. 6.7, (1): General 8bit representation */
if (kind == 0 && c == '\r')
*(d-1) = '\n';
else
*d++ = '\n';
}
*d = '\0';
*l = d - dest;
}
/*
* Decode an attachment encoded with quoted-printable.
*
* Why doesn't this overflow any buffers? First, it's guaranteed
* that the length of a line grows when you _en_-code it to
* quoted-printable. That means that we always can store the
* result in a buffer of at most the _same_ size.
*
* Now, we don't special-case if the line we read with fgets()
* isn't terminated. We don't care about this, since STRING > 78,
* so corrupted input will just be corrupted a bit more. That
* implies that STRING+1 bytes are always sufficient to store the
* result of qp_decode_line.
*
* Finally, at soft line breaks, some part of a multibyte character
* may have been left over by mutt_convert_to_state(). This shouldn't
* be more than 6 characters, so STRING + 7 should be sufficient
* memory to store the decoded data.
*
* Just to make sure that I didn't make some off-by-one error
* above, we just use STRING*2 for the target buffer's size.
*
*/
static void mutt_decode_quoted (STATE *s, long len, int istext, iconv_t cd)
{
char line[STRING];
char decline[2*STRING];
size_t l = 0;
size_t linelen; /* number of input bytes in `line' */
size_t l3;
int last; /* store the last character in the input line */
if (istext)
state_set_prefix(s);
while (len > 0)
{
last = 0;
/*
* It's ok to use a fixed size buffer for input, even if the line turns
* out to be longer than this. Just process the line in chunks. This
* really shouldn't happen according the MIME spec, since Q-P encoded
* lines are at most 76 characters, but we should be liberal about what
* we accept.
*/
if (fgets (line, MIN ((ssize_t)sizeof (line), len + 1), s->fpin) == NULL)
break;
linelen = strlen(line);
len -= linelen;
/*
* inspect the last character we read so we can tell if we got the
* entire line.
*/
last = linelen ? line[linelen - 1] : 0;
/* chop trailing whitespace if we got the full line */
if (last == '\n')
{
while (linelen > 0 && ISSPACE (line[linelen-1]))
linelen--;
line[linelen]=0;
}
/* decode and do character set conversion */
qp_decode_line (decline + l, line, &l3, last);
l += l3;
mutt_convert_to_state (cd, decline, &l, s);
}
mutt_convert_to_state (cd, 0, 0, s);
state_reset_prefix(s);
}
void mutt_decode_base64 (STATE *s, long len, int istext, iconv_t cd)
{
char buf[5];
int c1, c2, c3, c4, ch, cr = 0, i;
char bufi[BUFI_SIZE];
size_t l = 0;
buf[4] = 0;
if (istext)
state_set_prefix(s);
while (len > 0)
{
for (i = 0 ; i < 4 && len > 0 ; len--)
{
if ((ch = fgetc (s->fpin)) == EOF)
break;
if (ch >= 0 && ch < 128 && (base64val(ch) != -1 || ch == '='))
buf[i++] = ch;
}
if (i != 4)
{
/* "i" may be zero if there is trailing whitespace, which is not an error */
if (i != 0)
dprint (2, (debugfile, "%s:%d [mutt_decode_base64()]: "
"didn't get a multiple of 4 chars.\n", __FILE__, __LINE__));
break;
}
c1 = base64val (buf[0]);
c2 = base64val (buf[1]);
ch = (c1 << 2) | (c2 >> 4);
if (cr && ch != '\n')
bufi[l++] = '\r';
cr = 0;
if (istext && ch == '\r')
cr = 1;
else
bufi[l++] = ch;
if (buf[2] == '=')
break;
c3 = base64val (buf[2]);
ch = ((c2 & 0xf) << 4) | (c3 >> 2);
if (cr && ch != '\n')
bufi[l++] = '\r';
cr = 0;
if (istext && ch == '\r')
cr = 1;
else
bufi[l++] = ch;
if (buf[3] == '=') break;
c4 = base64val (buf[3]);
ch = ((c3 & 0x3) << 6) | c4;
if (cr && ch != '\n')
bufi[l++] = '\r';
cr = 0;
if (istext && ch == '\r')
cr = 1;
else
bufi[l++] = ch;
if (l + 8 >= sizeof (bufi))
mutt_convert_to_state (cd, bufi, &l, s);
}
if (cr) bufi[l++] = '\r';
mutt_convert_to_state (cd, bufi, &l, s);
mutt_convert_to_state (cd, 0, 0, s);
state_reset_prefix(s);
}
static unsigned char decode_byte (char ch)
{
if (ch == 96)
return 0;
return ch - 32;
}
static void mutt_decode_uuencoded (STATE *s, long len, int istext, iconv_t cd)
{
char tmps[SHORT_STRING];
char linelen, c, l, out;
char *pt;
char bufi[BUFI_SIZE];
size_t k = 0;
if(istext)
state_set_prefix(s);
while(len > 0)
{
if ((fgets(tmps, sizeof(tmps), s->fpin)) == NULL)
return;
len -= mutt_strlen(tmps);
if ((!mutt_strncmp (tmps, "begin", 5)) && ISSPACE (tmps[5]))
break;
}
while(len > 0)
{
if ((fgets(tmps, sizeof(tmps), s->fpin)) == NULL)
return;
len -= mutt_strlen(tmps);
if (!mutt_strncmp (tmps, "end", 3))
break;
pt = tmps;
linelen = decode_byte (*pt);
pt++;
for (c = 0; c < linelen;)
{
for (l = 2; l <= 6; l += 2)
{
out = decode_byte (*pt) << l;
pt++;
out |= (decode_byte (*pt) >> (6 - l));
bufi[k++] = out;
c++;
if (c == linelen)
break;
}
mutt_convert_to_state (cd, bufi, &k, s);
pt++;
}
}
mutt_convert_to_state (cd, bufi, &k, s);
mutt_convert_to_state (cd, 0, 0, s);
state_reset_prefix(s);
}
/* ----------------------------------------------------------------------------
* A (not so) minimal implementation of RFC1563.
*/
#define IndentSize (4)
enum { RICH_PARAM=0, RICH_BOLD, RICH_UNDERLINE, RICH_ITALIC, RICH_NOFILL,
RICH_INDENT, RICH_INDENT_RIGHT, RICH_EXCERPT, RICH_CENTER, RICH_FLUSHLEFT,
RICH_FLUSHRIGHT, RICH_COLOR, RICH_LAST_TAG };
static const struct {
const wchar_t *tag_name;
int index;
} EnrichedTags[] = {
{ L"param", RICH_PARAM },
{ L"bold", RICH_BOLD },
{ L"italic", RICH_ITALIC },
{ L"underline", RICH_UNDERLINE },
{ L"nofill", RICH_NOFILL },
{ L"excerpt", RICH_EXCERPT },
{ L"indent", RICH_INDENT },
{ L"indentright", RICH_INDENT_RIGHT },
{ L"center", RICH_CENTER },
{ L"flushleft", RICH_FLUSHLEFT },
{ L"flushright", RICH_FLUSHRIGHT },
{ L"flushboth", RICH_FLUSHLEFT },
{ L"color", RICH_COLOR },
{ L"x-color", RICH_COLOR },
{ NULL, -1 }
};
struct enriched_state
{
wchar_t *buffer;
wchar_t *line;
wchar_t *param;
size_t buff_len;
size_t line_len;
size_t line_used;
size_t line_max;
size_t indent_len;
size_t word_len;
size_t buff_used;
size_t param_used;
size_t param_len;
int tag_level[RICH_LAST_TAG];
int WrapMargin;
STATE *s;
};
static void enriched_wrap (struct enriched_state *stte)
{
int x;
int extra;
if (stte->line_len)
{
if (stte->tag_level[RICH_CENTER] || stte->tag_level[RICH_FLUSHRIGHT])
{
/* Strip trailing white space */
size_t y = stte->line_used - 1;
while (y && iswspace (stte->line[y]))
{
stte->line[y] = (wchar_t) '\0';
y--;
stte->line_used--;
stte->line_len--;
}
if (stte->tag_level[RICH_CENTER])
{
/* Strip leading whitespace */
y = 0;
while (stte->line[y] && iswspace (stte->line[y]))
y++;
if (y)
{
size_t z;
for (z = y ; z <= stte->line_used; z++)
{
stte->line[z - y] = stte->line[z];
}
stte->line_len -= y;
stte->line_used -= y;
}
}
}
extra = stte->WrapMargin - stte->line_len - stte->indent_len -
(stte->tag_level[RICH_INDENT_RIGHT] * IndentSize);
if (extra > 0)
{
if (stte->tag_level[RICH_CENTER])
{
x = extra / 2;
while (x)
{
state_putc (' ', stte->s);
x--;
}
}
else if (stte->tag_level[RICH_FLUSHRIGHT])
{
x = extra-1;
while (x)
{
state_putc (' ', stte->s);
x--;
}
}
}
state_putws ((const wchar_t*) stte->line, stte->s);
}
state_putc ('\n', stte->s);
stte->line[0] = (wchar_t) '\0';
stte->line_len = 0;
stte->line_used = 0;
stte->indent_len = 0;
if (stte->s->prefix)
{
state_puts (stte->s->prefix, stte->s);
stte->indent_len += mutt_strlen (stte->s->prefix);
}
if (stte->tag_level[RICH_EXCERPT])
{
x = stte->tag_level[RICH_EXCERPT];
while (x)
{
if (stte->s->prefix)
{
state_puts (stte->s->prefix, stte->s);
stte->indent_len += mutt_strlen (stte->s->prefix);
}
else
{
state_puts ("> ", stte->s);
stte->indent_len += mutt_strlen ("> ");
}
x--;
}
}
else
stte->indent_len = 0;
if (stte->tag_level[RICH_INDENT])
{
x = stte->tag_level[RICH_INDENT] * IndentSize;
stte->indent_len += x;
while (x)
{
state_putc (' ', stte->s);
x--;
}
}
}
static void enriched_flush (struct enriched_state *stte, int wrap)
{
if (!stte->tag_level[RICH_NOFILL] && (stte->line_len + stte->word_len >
(stte->WrapMargin - (stte->tag_level[RICH_INDENT_RIGHT] * IndentSize) -
stte->indent_len)))
enriched_wrap (stte);
if (stte->buff_used)
{
stte->buffer[stte->buff_used] = (wchar_t) '\0';
stte->line_used += stte->buff_used;
if (stte->line_used > stte->line_max)
{
stte->line_max = stte->line_used;
safe_realloc (&stte->line, (stte->line_max + 1) * sizeof (wchar_t));
}
wcscat (stte->line, stte->buffer);
stte->line_len += stte->word_len;
stte->word_len = 0;
stte->buff_used = 0;
}
if (wrap)
enriched_wrap(stte);
fflush (stte->s->fpout);
}
static void enriched_putwc (wchar_t c, struct enriched_state *stte)
{
if (stte->tag_level[RICH_PARAM])
{
if (stte->tag_level[RICH_COLOR])
{
if (stte->param_used + 1 >= stte->param_len)
safe_realloc (&stte->param, (stte->param_len += STRING) * sizeof (wchar_t));
stte->param[stte->param_used++] = c;
}
return; /* nothing to do */
}
/* see if more space is needed (plus extra for possible rich characters) */
if (stte->buff_len < stte->buff_used + 3)
{
stte->buff_len += LONG_STRING;
safe_realloc (&stte->buffer, (stte->buff_len + 1) * sizeof (wchar_t));
}
if ((!stte->tag_level[RICH_NOFILL] && iswspace (c)) || c == (wchar_t) '\0')
{
if (c == (wchar_t) '\t')
stte->word_len += 8 - (stte->line_len + stte->word_len) % 8;
else
stte->word_len++;
stte->buffer[stte->buff_used++] = c;
enriched_flush (stte, 0);
}
else
{
if (stte->s->flags & M_DISPLAY)
{
if (stte->tag_level[RICH_BOLD])
{
stte->buffer[stte->buff_used++] = c;
stte->buffer[stte->buff_used++] = (wchar_t) '\010';
stte->buffer[stte->buff_used++] = c;
}
else if (stte->tag_level[RICH_UNDERLINE])
{
stte->buffer[stte->buff_used++] = '_';
stte->buffer[stte->buff_used++] = (wchar_t) '\010';
stte->buffer[stte->buff_used++] = c;
}
else if (stte->tag_level[RICH_ITALIC])
{
stte->buffer[stte->buff_used++] = c;
stte->buffer[stte->buff_used++] = (wchar_t) '\010';
stte->buffer[stte->buff_used++] = '_';
}
else
{
stte->buffer[stte->buff_used++] = c;
}
}
else
{
stte->buffer[stte->buff_used++] = c;
}
stte->word_len++;
}
}
static void enriched_puts (const char *s, struct enriched_state *stte)
{
const char *c;
if (stte->buff_len < stte->buff_used + mutt_strlen (s))
{
stte->buff_len += LONG_STRING;
safe_realloc (&stte->buffer, (stte->buff_len + 1) * sizeof (wchar_t));
}
c = s;
while (*c)
{
stte->buffer[stte->buff_used++] = (wchar_t) *c;
c++;
}
}
static void enriched_set_flags (const wchar_t *tag, struct enriched_state *stte)
{
const wchar_t *tagptr = tag;
int i, j;
if (*tagptr == (wchar_t) '/')
tagptr++;
for (i = 0, j = -1; EnrichedTags[i].tag_name; i++)
if (wcscasecmp (EnrichedTags[i].tag_name, tagptr) == 0)
{
j = EnrichedTags[i].index;
break;
}
if (j != -1)
{
if (j == RICH_CENTER || j == RICH_FLUSHLEFT || j == RICH_FLUSHRIGHT)
enriched_flush (stte, 1);
if (*tag == (wchar_t) '/')
{
if (stte->tag_level[j]) /* make sure not to go negative */
stte->tag_level[j]--;
if ((stte->s->flags & M_DISPLAY) && j == RICH_PARAM && stte->tag_level[RICH_COLOR])
{
stte->param[stte->param_used] = (wchar_t) '\0';
if (!wcscasecmp(L"black", stte->param))
{
enriched_puts("\033[30m", stte);
}
else if (!wcscasecmp(L"red", stte->param))
{
enriched_puts("\033[31m", stte);
}
else if (!wcscasecmp(L"green", stte->param))
{
enriched_puts("\033[32m", stte);
}
else if (!wcscasecmp(L"yellow", stte->param))
{
enriched_puts("\033[33m", stte);
}
else if (!wcscasecmp(L"blue", stte->param))
{
enriched_puts("\033[34m", stte);
}
else if (!wcscasecmp(L"magenta", stte->param))
{
enriched_puts("\033[35m", stte);
}
else if (!wcscasecmp(L"cyan", stte->param))
{
enriched_puts("\033[36m", stte);
}
else if (!wcscasecmp(L"white", stte->param))
{
enriched_puts("\033[37m", stte);
}
}
if ((stte->s->flags & M_DISPLAY) && j == RICH_COLOR)
{
enriched_puts("\033[0m", stte);
}
/* flush parameter buffer when closing the tag */
if (j == RICH_PARAM)
{
stte->param_used = 0;
stte->param[0] = (wchar_t) '\0';
}
}
else
stte->tag_level[j]++;
if (j == RICH_EXCERPT)
enriched_flush(stte, 1);
}
}
static int text_enriched_handler (BODY *a, STATE *s)
{
enum {
TEXT, LANGLE, TAG, BOGUS_TAG, NEWLINE, ST_EOF, DONE
} state = TEXT;
long bytes = a->length;
struct enriched_state stte;
wchar_t wc = 0;
int tag_len = 0;
wchar_t tag[LONG_STRING + 1];
memset (&stte, 0, sizeof (stte));
stte.s = s;
stte.WrapMargin = ((s->flags & M_DISPLAY) ? (COLS-4) : ((COLS-4)<72)?(COLS-4):72);
stte.line_max = stte.WrapMargin * 4;
stte.line = (wchar_t *) safe_calloc (1, (stte.line_max + 1) * sizeof (wchar_t));
stte.param = (wchar_t *) safe_calloc (1, (STRING) * sizeof (wchar_t));
stte.param_len = STRING;
stte.param_used = 0;
if (s->prefix)
{
state_puts (s->prefix, s);
stte.indent_len += mutt_strlen (s->prefix);
}
while (state != DONE)
{
if (state != ST_EOF)
{
if (!bytes || (wc = fgetwc (s->fpin)) == WEOF)
state = ST_EOF;
else
bytes--;
}
switch (state)
{
case TEXT :
switch (wc)
{
case '<' :
state = LANGLE;
break;
case '\n' :
if (stte.tag_level[RICH_NOFILL])
{
enriched_flush (&stte, 1);
}
else
{
enriched_putwc ((wchar_t) ' ', &stte);
state = NEWLINE;
}
break;
default:
enriched_putwc (wc, &stte);
}
break;
case LANGLE :
if (wc == (wchar_t) '<')
{
enriched_putwc (wc, &stte);
state = TEXT;
break;
}
else
{
tag_len = 0;
state = TAG;
}
/* Yes, fall through (it wasn't a <<, so this char is first in TAG) */
case TAG :
if (wc == (wchar_t) '>')
{
tag[tag_len] = (wchar_t) '\0';
enriched_set_flags (tag, &stte);
state = TEXT;
}
else if (tag_len < LONG_STRING) /* ignore overly long tags */
tag[tag_len++] = wc;
else
state = BOGUS_TAG;
break;
case BOGUS_TAG :
if (wc == (wchar_t) '>')
state = TEXT;
break;
case NEWLINE :
if (wc == (wchar_t) '\n')
enriched_flush (&stte, 1);
else
{
ungetwc (wc, s->fpin);
bytes++;
state = TEXT;
}
break;
case ST_EOF :
enriched_putwc ((wchar_t) '\0', &stte);
enriched_flush (&stte, 1);
state = DONE;
break;
case DONE: /* not reached, but gcc complains if this is absent */
break;
}
}
state_putc ('\n', s); /* add a final newline */
FREE (&(stte.buffer));
FREE (&(stte.line));
FREE (&(stte.param));
return 0;
}
/* for compatibility with metamail */
static int is_mmnoask (const char *buf)
{
char tmp[LONG_STRING], *p, *q;
int lng;
if ((p = getenv ("MM_NOASK")) != NULL && *p)
{
if (mutt_strcmp (p, "1") == 0)
return (1);
strfcpy (tmp, p, sizeof (tmp));
p = tmp;
while ((p = strtok (p, ",")) != NULL)
{
if ((q = strrchr (p, '/')) != NULL)
{
if (*(q+1) == '*')
{
if (ascii_strncasecmp (buf, p, q-p) == 0)
return (1);
}
else
{
if (ascii_strcasecmp (buf, p) == 0)
return (1);
}
}
else
{
lng = mutt_strlen (p);
if (buf[lng] == '/' && mutt_strncasecmp (buf, p, lng) == 0)
return (1);
}
p = NULL;
}
}
return (0);
}
/*
* Returns:
* 1 if the body part should be filtered by a mailcap entry prior to viewing inline.
*
* 0 otherwise
*/
static int mutt_is_autoview (BODY *b)
{
char type[SHORT_STRING];
snprintf (type, sizeof (type), "%s/%s", TYPE (b), b->subtype);
/* determine if there is a mailcap entry suitable for auto_view
*
* WARNING: _type is altered by this call as a result of `mime_lookup' support */
if (rfc1524_mailcap_lookup(b, type, NULL, M_AUTOVIEW))
{
if (option(OPTIMPLICITAUTOVIEW))
{
/* $implicit_autoview is essentially the same as "auto_view *" */
return 1;
}
else
{
/* determine if this type is on the user's auto_view list */
LIST *t = AutoViewList;
for (; t; t = t->next) {
int i = mutt_strlen (t->data) - 1;
if ((i > 0 && t->data[i-1] == '/' && t->data[i] == '*' &&
ascii_strncasecmp (type, t->data, i) == 0) ||
ascii_strcasecmp (type, t->data) == 0)
return 1;
}
if (is_mmnoask (type))
return 1;
}
}
return 0;
}
#define TXTHTML 1
#define TXTPLAIN 2
#define TXTENRICHED 3
static int alternative_handler (BODY *a, STATE *s)
{
BODY *choice = NULL;
BODY *b;
LIST *t;