Mercurial > sdl-ios-xcode
view docs/man3/SDL_GetMouseState.3 @ 1626:a80e1e0880b8
Fixed bug #176
[I'm fixing this for the public headers, but I'm not going to bother for the SDL library code (yet)]
To clarify: Normaly, GCC (or, to be precise, the preprocessor) will ignore
this, and compile the code happily. However, one can specify -Wundef to get a
warning about this.
One can probably argue whether to consider this a bug or not; but I think that
(a) from a semantic point of view, using "#if FOO" when FOO is not defined is
strange, and (b) since it is possible to trigger a warning about this, and a
trivial fix exists, it should be corrected.
I can think of two alternative patches, BTW:
1) Simply use #define HAVE_FOO 0, instead of not defining HAVE_FOO at all
2) Change
#if HAVE_FOO
to
#if HAVE_FOO+0
which always does the right thing.
But I think I still prefer the attached patch :-).
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 13 Apr 2006 13:38:40 +0000 |
| parents | e5bc29de3f0a |
| children | 546f7c1eb755 |
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.TH "SDL_GetMouseState" "3" "Tue 11 Sep 2001, 22:59" "SDL" "SDL API Reference" .SH "NAME" SDL_GetMouseState\- Retrieve the current state of the mouse .SH "SYNOPSIS" .PP \fB#include "SDL\&.h" .sp \fBUint8 \fBSDL_GetMouseState\fP\fR(\fBint *x, int *y\fR); .SH "DESCRIPTION" .PP The current button state is returned as a button bitmask, which can be tested using the \fBSDL_BUTTON(X)\fP macros, and \fBx\fR and \fBy\fR are set to the current mouse cursor position\&. You can pass \fBNULL\fP for either \fBx\fR or \fBy\fR\&. .SH "EXAMPLE" .PP .nf \f(CWSDL_PumpEvents(); if(SDL_GetMouseState(NULL, NULL)&SDL_BUTTON(1)) printf("Mouse Button 1(left) is pressed\&. ");\fR .fi .PP .SH "SEE ALSO" .PP \fI\fBSDL_GetRelativeMouseState\fP\fR, \fI\fBSDL_PumpEvents\fP\fR ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:59