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RRTcodebaseC

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quote_words = 1;
end = cur;
}
else {
break;
}
if (* cur != '\0') {
cur ++;
}
}
if (quote_words)
{
if ( !quote_word(DEF_DISPLAY_CHARSET, mmapstr, begin, end - begin)) {
goto cleanup;
}
if ((* end==' ') || (* end=='\t')) {
if (mmap_string_append_c(mmapstr, * end)==0) {
goto cleanup;
}
end ++;
}
if (* end != '\0') {
if (mmap_string_append_len(mmapstr, end, cur - end)==NULL) {
goto cleanup;
}
}
}
else
{
if (mmap_string_append_len(mmapstr, begin, cur - begin)==NULL) {
goto cleanup;
}
}
if ((* cur==' ') || (* cur=='\t')) {
if (mmap_string_append_c(mmapstr, * cur)==0) {
goto cleanup;
}
cur ++;
}
}
ret_str = strdup(mmapstr->str);
cleanup:
if (mmapstr) {
mmap_string_free(mmapstr);
}
return ret_str;
}
/**
* Decode non-ascii-strings as `=?UTF-8?Q?Bj=c3=b6rn_Petersen?=`.
* Belongs to RFC 2047: https://tools.ietf.org/html/rfc2047
*
* @param in String to decode.
* @return Returns the null-terminated decoded string as UTF-8. Must be free()'d when no longed needed.
* On errors, NULL is returned.
*/
char* dc_decode_header_words(const char* in)
{
/* decode strings as. `=?UTF-8?Q?Bj=c3=b6rn_Petersen?=`)
if `in` is NULL, `out` is NULL as well; also returns NULL on errors */
if (in==NULL) {
return NULL; /* no string given */
}
char* out = NULL;
size_t cur_token = 0;
int r = mailmime_encoded_phrase_parse(DEF_INCOMING_CHARSET, in, strlen(in), &cur_token, DEF_DISPLAY_CHARSET, &out);
if (r != MAILIMF_NO_ERROR || out==NULL) {
out = dc_strdup(in); /* error, make a copy of the original string (as we free it later) */
}
return out; /* must be free()'d by the caller */
}
/*******************************************************************************
* Encode/decode modified UTF-7 as needed for IMAP, see RFC 2192
******************************************************************************/
// UTF7 modified base64 alphabet
static const char base64chars[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
/**
* Convert an UTF-8 string to a modified UTF-7 string
* that is needed eg. for IMAP mailbox names.
*
* Example: `Björn Petersen` gets encoded to `Bj&APY-rn_Petersen`
*