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#include "config.h"
/*
** Copyright 1998 - 2011 Double Precision, Inc. See COPYING for
** distribution information.
*/
/*
*/
#include "filter.h"
#include "buf.h"
#include "sqwebmail.h"
#include <string.h>
static int converted_text(const char *buf,
size_t size,
void *arg)
{
struct filter_info *info=(struct filter_info *)arg;
(*info->handler_func)(buf, size, info->func_arg);
return 0;
}
void filter_start(struct filter_info *info,
const char *charset,
void (*handler)(const char *, size_t, void *),
void *arg)
{
info->conversion_error=0;
info->handle=unicode_convert_init(unicode_u_ucs4_native,
charset,
converted_text, info);
if (info->handle == NULL)
info->conversion_error=1;
info->handler_func=handler;
info->func_arg=arg;
info->u_w=0;
info->linesize=MYLINESIZE + 10;
info->prevchar='\n';
}
void filter(struct filter_info *info,
const char32_t *ptr, size_t cnt)
{
size_t i, prev;
if (!info->handle)
return;
i=prev=0;
while (1)
{
const char *p=0;
char32_t prevchar=info->prevchar;
if (i < cnt)
{
info->prevchar=ptr[i];
if (ptr[i] == '\n')
{
info->u_w=0;
}
else
{
/* Force-break excessively long lines */
size_t uc_w=unicode_wcwidth(ptr[i]);
if (uc_w + info->u_w > info->linesize &&
unicode_grapheme_break(prevchar, ptr[i]))
{
char32_t nl='\n';
if (prev < i)
unicode_convert_uc
(info->handle,
ptr+prev, i-prev);
prev=i;
unicode_convert_uc(info->handle,
&nl, 1);
info->u_w=0;
}
info->u_w += uc_w;
}
switch (ptr[i]) {
case '<':
p="<";
break;
case '>':
p=">";
break;
case '&':
p="&";
break;
case '"':
p=""";
break;
default:
++i;
continue;
}
}
if (prev < i)
unicode_convert_uc(info->handle, ptr+prev, i-prev);
prev=++i;
if (!p)
break;
while (*p)
{
char32_t uc= *p++;
unicode_convert_uc(info->handle, &uc, 1);
}
}
}
void filter_passthru(struct filter_info *info,
const char32_t *ptr, size_t cnt)
{
unicode_convert_uc(info->handle, ptr, cnt);
}
void filter_end(struct filter_info *info)
{
if (info->handle)
{
unicode_convert_deinit(info->handle,
&info->conversion_error);
info->handle=NULL;
}
}
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