Float division

Started by scypior March 24, 2009 06:43 AM

8 comments, last by WitchLord 15 years, 7 months ago

Author

122

March 24, 2009 06:43 AM

Hello, I've got following code: float factor = 0.5f; int t = float(timeout) / factor; // timeout is integer value And it gives me division by zero error. Am I doing something wrong, or is this a bug?

WitchLord

4,860

March 24, 2009 09:33 AM

You're not doing anything wrong. This has got to be a bug.

I'll investigate this. Thanks.

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WitchLord

4,860

March 24, 2009 10:10 AM

I can't reproduce this error. I tested with both 2.15.2 and the latest WIP.

Can you send me a test that reproduces the bug?

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scypior

Author

122

April 04, 2009 04:44 PM

Hello,

Version 2.16.0, and still the same:

float t = 1.0f / 0.5f;

Gives compile-time division by zero... It just looks like float literals are casted to integers during compilation...

[Edited by - scypior on April 4, 2009 5:44:10 PM]

droz

134

April 04, 2009 07:38 PM

I can also confirm that neither are reproducible for me on 2.16.0 running Linux.

WitchLord

4,860

April 04, 2009 11:05 PM

This may have to do with your locale settings. Is your OS configured to use comma as the floating point decimal character?

I'll make some tests on this.

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scypior

Author

122

April 05, 2009 04:50 AM

Yes, and changing OS settings to '.' helps. Damned comma floats! ;)

WitchLord

4,860

April 05, 2009 07:38 AM

Ah, at least we have confirmed the cause.

Obviously the compiler cannot be affected by this locale, so I'll have to find a way to turn off international settings while compiling (or perhaps write my own string to float converter).

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SiCrane

11,840

April 05, 2009 07:47 AM

Try adding:

setlocale(LC_ALL, "C");

to your program somewhere before you create the script engine. Does that help?

WitchLord

4,860

April 05, 2009 10:48 AM

I just checked in a fix for this. I simply added a call to setlocale(LC_NUMERIC,"C") before calling strtod in the compiler. Afterwards I restore the original local so the rest of the application isn't affected.

AngelCode.com - game development and more - Reference DB - game developer references
AngelScript - free scripting library - BMFont - free bitmap font generator - Tower - free puzzle game

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