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/*
** Copyright 2010-2014 Double Precision, Inc. See COPYING for
** distribution information.
*/
#include "rfc2045.h"
#include "rfc822/rfc822.h"
#include <ctype.h>
#include <unistd.h>
#include <string.h>
struct doconvtoutf8_info {
struct rfc2045_decodemsgtoutf8_cb *callback;
int err_flag;
};
static void doconvtoutf8_write(const char *p, size_t n,
void *void_arg)
{
struct doconvtoutf8_info *ptr=
(struct doconvtoutf8_info *)void_arg;
if (n && ptr->err_flag == 0)
ptr->err_flag=(*ptr->callback->output_func)
(p, n, ptr->callback->arg);
}
static void doconvtoutf8_write_noeol(const char *p, size_t n,
void *void_arg)
{
while (n)
{
size_t i;
if (*p == '\n')
{
doconvtoutf8_write(" ", 1, void_arg);
++p;
--n;
continue;
}
for (i=0; i<n; ++i)
if (p[i] == '\n')
break;
doconvtoutf8_write(p, i, void_arg);
p += i;
n -= i;
}
}
static void doconvtoutf8_error(const char *p, int n,
void *void_arg)
{
struct doconvtoutf8_info *ptr=(struct doconvtoutf8_info *)void_arg;
ptr->err_flag= -1;
}
static int doconvtoutf8_rfc822hdr(const char *header,
const char *value,
struct rfc2045_decodemsgtoutf8_cb *callback)
{
struct doconvtoutf8_info info;
info.err_flag=0;
info.callback=callback;
if (callback->headerfilter_func &&
(*callback->headerfilter_func)(header, value, callback->arg) == 0)
return 0;
if ((callback->flags & RFC2045_DECODEMSG_NOHEADERNAME) == 0)
{
doconvtoutf8_write(header, strlen(header), &info);
doconvtoutf8_write(": ", 2, &info);
}
rfc822_display_hdrvalue(header, value, "utf-8",
doconvtoutf8_write_noeol,
doconvtoutf8_error,
&info);
doconvtoutf8_write("\n", 1, &info);
if (callback->headerdone_func && info.err_flag == 0)
{
int rc=(*callback->headerdone_func)(header, callback->arg);
if (rc)
info.err_flag=rc;
}
return info.err_flag;
}
static int decode_handler(const char *p, size_t n, void *voidarg)
{
const struct doconvtoutf8_info *ptr=
(const struct doconvtoutf8_info *)voidarg;
int rc=0;
if (n)
rc=(*ptr->callback->output_func)(p, n, ptr->callback->arg);
return rc;
}
int rfc2045_decodemsgtoutf8(struct rfc2045src *src,
struct rfc2045 *p,
struct rfc2045_decodemsgtoutf8_cb *callback)
{
struct rfc2045headerinfo *hi;
int rc;
hi=rfc2045header_start(src, p);
if (hi)
{
char *header;
char *value;
while (rfc2045header_get(hi, &header, &value,
RFC2045H_NOLC |
RFC2045H_KEEPNL) == 0 && header)
{
if (callback->flags & RFC2045_DECODEMSG_NOHEADERS)
continue;
if (doconvtoutf8_rfc822hdr(header, value,
callback) < 0)
return -1;
}
rfc2045header_end(hi);
}
if (p->firstpart)
{
for (p=p->firstpart; p; p=p->next)
{
if (!p->isdummy)
{
if ((rc=rfc2045_decodemsgtoutf8(src, p,
callback))
!= 0)
return rc;
}
}
}
else
{
const char *content_type;
const char *transfer_encoding;
const char *charset;
struct doconvtoutf8_info info;
info.callback=callback;
rfc2045_mimeinfo(p, &content_type, &transfer_encoding,
&charset);
if ((strncmp(content_type, "text/", 5) == 0 ||
strncmp(content_type, "message/", 8) == 0) &&
(callback->flags & RFC2045_DECODEMSG_NOBODY) == 0 &&
(rc=rfc2045_decodetextmimesection(src, p, "utf-8", NULL,
decode_handler,
&info)) != 0)
return rc;
}
return 0;
}
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