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#define __FUNC__ "unknown"
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/* Print a message and... DIE */
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/* Get a value within target interval */
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#define cutoff(tgt,min,max) (tgt) < (min) ? (min) : ((tgt) > (max) ? max : tgt)
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/* Update value to fit into target interval */
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#define val_range(tgt,min,max) (tgt) = cutoff(tgt,min,max)