rt_band_clamped_value_is_nodata()

int rt_band_clamped_value_is_nodata	(	rt_band	band,
		double	val
	)

Compare clamped value to band's clamped NODATA value.

Parameters

band	: the band whose NODATA value will be used for comparison
val	: the value to compare to the NODATA value

Returns

2 if unclamped value is unclamped NODATA 1 if clamped value is clamped NODATA 0 if clamped value is NOT clamped NODATA

Definition at line 2135 of file rt_band.c.

                                                          {
        int isequal = 0;
 
        assert(NULL != band);
 
        /* no NODATA, so never equal */
        if (!band->hasnodata)
                return 0;
 
        /* value is exactly NODATA */
        if (FLT_EQ(val, band->nodataval))
                return 2;
 
        /* ignore error from rt_pixtype_compare_clamped_values */
        rt_pixtype_compare_clamped_values(
                band->pixtype,
                val, band->nodataval,
                &isequal
        );
 
        return isequal ? 1 : 0;
}

References FLT_EQ, and rt_pixtype_compare_clamped_values().

Referenced by RASTER_dumpValues(), rt_band_corrected_clamped_value(), rt_band_get_pixel(), and rt_band_set_pixel().

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