From ea8c53b7fe2325efc8d36dfc8330cb4b5e34c098 Mon Sep 17 00:00:00 2001 From: Sam Lantinga Date: Fri, 5 Mar 2004 15:09:18 +0000 Subject: [PATCH] Avoid FPE with Linux 2.6 --HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40872 --- src/joystick/linux/SDL_sysjoystick.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/src/joystick/linux/SDL_sysjoystick.c b/src/joystick/linux/SDL_sysjoystick.c index 82d667718..d4247bd8f 100644 --- a/src/joystick/linux/SDL_sysjoystick.c +++ b/src/joystick/linux/SDL_sysjoystick.c @@ -383,7 +383,7 @@ static SDL_bool JS_ConfigJoystick(SDL_Joystick *joystick, int fd) static SDL_bool EV_ConfigJoystick(SDL_Joystick *joystick, int fd) { - int i; + int i, t; unsigned long keybit[40]; unsigned long absbit[40]; unsigned long relbit[40]; @@ -436,12 +436,18 @@ static SDL_bool EV_ConfigJoystick(SDL_Joystick *joystick, int fd) joystick->hwdata->abs_correct[i].used = 0; } else { joystick->hwdata->abs_correct[i].used = 1; - joystick->hwdata->abs_correct[i].coef[0] = - (values[2] + values[1]) / 2 - values[4]; - joystick->hwdata->abs_correct[i].coef[1] = - (values[2] + values[1]) / 2 + values[4]; - joystick->hwdata->abs_correct[i].coef[2] = - (1 << 29) / ((values[2] - values[1]) / 2 - 2 * values[4]); + t = (2 - values[4]); + if ( t != 0 ) { + joystick->hwdata->abs_correct[i].coef[0] = (values[2] + values[1]) / t; + } + t = (2 + values[4]); + if ( t != 0 ) { + joystick->hwdata->abs_correct[i].coef[1] = (values[2] + values[1]) / t; + } + t = ((values[2] - values[1]) / 2 - 2 * values[4]); + if ( t != 0 ) { + joystick->hwdata->abs_correct[i].coef[2] = (1 << 29) / t; + } } ++joystick->naxes; }