[Bug 97321] Query INFO_LOG_LENGTH for empty info log should return 0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97321

--- Comment #14 from Qiankun Miao <qiankun.miao at intel.com> ---
(In reply to Ian Romanick from comment #13)
> (In reply to Qiankun Miao from comment #11)
> > (In reply to Ian Romanick from comment #10)
> > > Also... has anyone checked what other implementations do using, say, a
> > > piglit test?  Something other than WebGL tests.
> > 
> > FYI:
> > NVidia 349.16 behaves the same as Mesa. NVidia 364.19 returns 0.
> 
> When the GL_INFO_LOG_LENGTH query returns 0, what does the following code
> output?
> 
>     char buffer[256];
> 
>     strcpy(buffer, "Nothing was written.");
>     glGetProgramInfoLog(prog, sizeof(buffer), NULL, buffer);
> 
>     printf("%s\n", buffer);

buffer would be:"\000othing was written.", '\000' <repeats xx times>
So printf will print an empty line.

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