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/*
** Copyright 2018 Double Precision, Inc.
** See COPYING for distribution information.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "maildirinfo.h"
#include <courier-unicode.h>
/* Count the size of the converted filename or foldername string */
static void count_utf8(const char *str, size_t n, void *arg)
{
*(size_t *)arg += n;
}
/* Save the converted filename or foldername string */
static void save_utf8(const char *str, size_t n, void *arg)
{
char **p=(char **)arg;
memcpy( (*p), str, n);
*p += n;
}
/*
** Split a string at periods, convert each split range between charsets.
*/
static int foldername_filename_convert(const char *src_chset,
const char *dst_chset,
const char *foldername,
void (*closure)(const char *, size_t,
void *),
void *arg)
{
unicode_convert_handle_t h;
char *cbufptr;
size_t cbufsize;
size_t l;
int conversion_error;
while (*foldername)
{
if (*foldername == '.')
{
(*closure)(foldername, 1, arg);
++foldername;
continue;
}
h=unicode_convert_tocbuf_init(src_chset,
dst_chset,
&cbufptr,
&cbufsize,
0);
if (!h)
{
errno=EINVAL;
return -1;
}
for (l=0; foldername[l] && foldername[l] != '.'; ++l)
;
unicode_convert(h, foldername, l);
if (unicode_convert_deinit(h, &conversion_error) == 0)
{
closure(cbufptr, cbufsize, arg);
free(cbufptr);
if (conversion_error)
{
errno=EILSEQ;
return -1;
}
}
else
return -1;
foldername += l;
}
return 0;
}
/* Convert either a foldername or a filename to the other */
static char *foldername_filename_convert_tobuf(const char *src_chset,
const char *dst_chset,
const char *foldername)
{
char *utf8, *p;
size_t l=1;
if (foldername_filename_convert(src_chset,
dst_chset,
foldername, count_utf8, &l))
return NULL;
utf8=malloc(l+1);
if (!utf8)
return NULL;
p=utf8;
if (foldername_filename_convert(src_chset,
dst_chset,
foldername, save_utf8, &p))
{
free(utf8);
return NULL;
}
*p=0;
return utf8;
}
char *imap_foldername_to_filename(int utf8_format, const char *foldername)
{
if (utf8_format)
return strdup(foldername);
return foldername_filename_convert_tobuf
(unicode_x_imap_modutf7,
"utf-8",
foldername);
}
char *imap_filename_to_foldername(int utf8_format, const char *filename)
{
if (utf8_format)
return strdup(filename);
return foldername_filename_convert_tobuf
("utf-8",
unicode_x_imap_modutf7,
filename);
}
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