view docs/html/sdlenableunicode.html @ 4355:9b464226e541 SDL-1.2

Fixed bug #855 Ludwig Nussel 2009-10-18 06:31:52 PDT an mprotect call was added to fix bug 528. However that results in a buffer that allows writing and code execution. Ie the no-execute security features of modern operating systems are defeated this way. Two mprotect calls are needed. One to make the buffer executable but not writeable when done and another one to make the buffer writeable again if the content needs to be changed.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 18 Oct 2009 17:31:37 +0000
parents 355632dca928
children
line wrap: on
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>SDL_EnableUNICODE</TITLE
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><H1
><A
NAME="SDLENABLEUNICODE"
></A
>SDL_EnableUNICODE</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN5805"
></A
><H2
>Name</H2
>SDL_EnableUNICODE&nbsp;--&nbsp;Enable UNICODE translation</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN5808"
></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
><A
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><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="FSFUNC"
>SDL_EnableUNICODE</B
></CODE
>(int enable);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN5815"
></A
><H2
>Description</H2
><P
>Enables/Disables Unicode keyboard translation.</P
><P
>To obtain the character codes corresponding to received keyboard events,
Unicode translation must first be turned on using this function. The
translation incurs a slight overhead for each keyboard event and is therefore
disabled by default. For each subsequently received key down event, the
<TT
CLASS="STRUCTFIELD"
><I
>unicode</I
></TT
> member of the
<A
HREF="sdlkeysym.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_keysym</SPAN
></A
> structure
will then contain the corresponding character code, or zero for keysyms that do
not correspond to any character code.</P
><P
>A value of 1 for <TT
CLASS="PARAMETER"
><I
>enable</I
></TT
> enables Unicode translation;
0 disables it, and -1 leaves it unchanged (useful for querying the current
translation mode).</P
><P
>Note that only key press events will be translated, not release events.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN5825"
></A
><H2
>Return Value</H2
><P
>Returns the previous translation mode (<SPAN
CLASS="RETURNVALUE"
>0</SPAN
> or <SPAN
CLASS="RETURNVALUE"
>1</SPAN
>).</P
></DIV
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><A
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></A
><H2
>See Also</H2
><P
><A
HREF="sdlkeysym.html"
><SPAN
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>SDL_keysym</SPAN
></A
></P
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