view docs/man3/SDL_EventState.3 @ 4388:1524d3237820 SDL-1.2

Fixed bug #896 John Popplewell 2009-12-08 23:05:50 PST Originally reported by AKFoerster on the mailing list. Error decoding UTF8 Russian text to UTF-16LE on Windows, but specifically on platforms without iconv support (the default on Windows). Valid UTF8 characters are flagged as being overlong and then substituted by the UNKNOWN_UNICODE character. After studying the testiconv.c example program, reading the RFCs and putting some printf statements in SDL_iconv.c the problem is in a test for 'Maximum overlong sequences', specifically 4.2.1, which is carried out by the following code: } else if ( p[0] >= 0xC0 ) { if ( (p[0] & 0xE0) != 0xC0 ) { /* Skip illegal sequences return SDL_ICONV_EILSEQ; */ ch = UNKNOWN_UNICODE; } else { if ( (p[0] & 0xCE) == 0xC0 ) { <<<<<<<< here overlong = SDL_TRUE; } ch = (Uint32)(p[0] & 0x1F); left = 1; } } else { Here is the 2-byte encoding of a character in range 00000080 - 000007FF 110xxxxx 10xxxxxx The line in question is supposed to be checking for an overlong sequence which would be less than 11000001 10111111 which should be represented as a single byte. BUT, the mask value (0xCE) is wrong, it isn't checking the top-most bit: 11000001 value 11001110 mask (incorrect) ^ and should be (0xDE): 11000001 value 11011110 mask (correct) making the above code: } else if ( p[0] >= 0xC0 ) { if ( (p[0] & 0xE0) != 0xC0 ) { /* Skip illegal sequences return SDL_ICONV_EILSEQ; */ ch = UNKNOWN_UNICODE; } else { if ( (p[0] & 0xDE) == 0xC0 ) { <<<<<<<< here overlong = SDL_TRUE; } ch = (Uint32)(p[0] & 0x1F); left = 1; } } else { I can supply a test program and/or a patch if required, best regards, John Popplewell
author Sam Lantinga <slouken@libsdl.org>
date Fri, 11 Dec 2009 08:00:57 +0000
parents 1238da4a7112
children
line wrap: on
line source

.TH "SDL_EventState" "3" "Tue 11 Sep 2001, 22:59" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_EventState \- This function allows you to set the state of processing certain events\&.
.SH "SYNOPSIS"
.PP
\fB#include "SDL\&.h"
.sp
\fBUint8 \fBSDL_EventState\fP\fR(\fBUint8 type, int state\fR);
.SH "DESCRIPTION"
.PP
This function allows you to set the state of processing certain event \fBtype\fR\&'s\&.
.PP
If \fBstate\fR is set to \fBSDL_IGNORE\fP, that event \fBtype\fR will be automatically dropped from the event queue and will not be filtered\&.
.PP
If \fBstate\fR is set to \fBSDL_ENABLE\fP, that event \fBtype\fR will be processed normally\&.
.PP
If \fBstate\fR is set to \fBSDL_QUERY\fP, \fBSDL_EventState\fP will return the current processing state of the specified event \fBtype\fR\&.
.PP
A list of event \fBtype\fR\&'s can be found in the \fI\fBSDL_Event\fR\fR section\&.
.SH "SEE ALSO"
.PP
\fI\fBSDL_Event\fR\fR
.\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:59