[GRASS-dev] Re: i.modis.qc

[Yann Chemin]

Hello Glynn,

It should be standard bit shift ">>", so as to push the binary bits of
interest at the right side to be used for classification.
I do not get those warnings, and it processes as expected. Anything
special about your compilation/compiler maybe?

Yann



2008/10/24 Glynn Clements <glynn at gclements.plus.com>:
>
> i.modis.qc currently generates a number of warnings:
>
> qc250b.c:14: warning: statement with no effect
> qc250c.c:20: warning: statement with no effect
> qc250d.c:12: warning: statement with no effect
> qc250e.c:12: warning: statement with no effect
> qc250f.c:12: warning: statement with no effect
> qc500c.c:22: warning: statement with no effect
> qc500d.c:12: warning: statement with no effect
> qc500e.c:12: warning: statement with no effect
>
> These all relate to code such as:
>
>    qctemp >> 2;                /*bits [2-3] become [0-1] */
>
> Is this supposed to be:
>
>    qctemp >>= 2;
> or:
>    pixel >>= 2;
>
> instead?
>
> --
> Glynn Clements <glynn at gclements.plus.com>
>



-- 
Yann Chemin
International Rice Research Institute
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