Mercurial > sdl-ios-xcode
view docs/man3/SDL_GetKeyState.3 @ 4352:c8bf421431f9 SDL-1.2
Fixed bug #853
Ludwig Nussel 2009-10-18 05:34:18 PDT
src/joystick/linux/SDL_sysjoystick.c has some problems:
- test_bit() might break with strict aliasing
- test_bit() assumes array is Uint32 but its actually "unsigned long"
on 64bit systems sizeof(long) != sizeof(Uint32).
- the keybit array is too small
- the arrays are unitialized so the number of
detected buttons is quite random
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 18 Oct 2009 16:14:57 +0000 |
| parents | 1238da4a7112 |
| children |
line wrap: on
line source
.TH "SDL_GetKeyState" "3" "Tue 11 Sep 2001, 22:59" "SDL" "SDL API Reference" .SH "NAME" SDL_GetKeyState \- Get a snapshot of the current keyboard state .SH "SYNOPSIS" .PP \fB#include "SDL\&.h" .sp \fBUint8 *\fBSDL_GetKeyState\fP\fR(\fBint *numkeys\fR); .SH "DESCRIPTION" .PP Gets a snapshot of the current keyboard state\&. The current state is return as a pointer to an array, the size of this array is stored in \fBnumkeys\fR\&. The array is indexed by the \fI\fBSDLK_*\fP\fR symbols\&. A value of 1 means the key is pressed and a value of 0 means its not\&. The pointer returned is a pointer to an internal SDL array and should not be freed by the caller\&. .PP .RS \fBNote: .PP Use \fI\fBSDL_PumpEvents\fP\fR to update the state array\&. .RE .SH "EXAMPLE" .PP .PP .nf \f(CWUint8 *keystate = SDL_GetKeyState(NULL); if ( keystate[SDLK_RETURN] ) printf("Return Key Pressed\&. ");\fR .fi .PP .SH "SEE ALSO" .PP \fI\fBSDL Key Symbols\fP\fR, \fI\fBSDL_PumpEvents\fP\fR .\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:59