On Aug 19, 2010, at 19:27, Brad Stone wrote:
> Can someone help me figure out why (brackets not included) [• m]
> (which is, on the Mac, an option-8 character, a tab character and a lowercase
> m) converts to (brackets not included [• m] ?
>
> The source text is quoted-printable UTF-8 text I created and saved in an XML
> file in a different application. All the other characters and line returns
> translate perfectly but this option-8 tab combination does not.
>
> Here is my source code.
>
> Thanks
>
> - (NSString *)stringWithQuotedPrintableString:(const char *)qpString {
>
> const char *p = qpString;
> char *ep, *utf8_string = malloc(strlen(qpString) * sizeof(char));
> NSParameterAssert( utf8_string );
> ep = utf8_string;
>
>
>
> while( *p ) {
>
> switch( *p ) {
> case '=':
>
> NSAssert1( *(p + 1) != 0 && *(p + 2) != 0,
> @"Malformed QP String: %s", qpString);
> if( *(p + 1) != '\r' ) {
> int i, byte[2];
> for( i = 0; i < 2; i++ ) {
> byte[i] = *(p + i + 1);
> if( isdigit(byte[i]) )
> byte[i] -= 0x30;
> else
> byte[i] -= 0x37;
>
> if (byte[i] >= 0 && byte[i] <
> 16) {
> continue;
> }
>
> NSAssert( byte[i] >= 0 &&
> byte[i] < 16, @"bad encoded character");
> }
> *(ep++) = (char) (byte[0] << 4) |
> byte[1];
> }
> p += 3;
> continue;
> default:
> *(ep++) = *(p++);
> continue;
> }
> }
> return [[NSString alloc] initWithBytesNoCopy:utf8_string
> length:strlen(utf8_string) encoding:NSUTF8StringEncoding freeWhenDone:YES];
> }
It would be a help if you could show the hex bytes actually being passed to
'initWithBytesNoCopy...'.
I note, however, that if your input contains the sequence "=\r", your code
above will eat the character following the '\r'. That sort of looks like a bug.
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