sort.h

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#ifndef MUTT_CONFIG_SORT_H
#define MUTT_CONFIG_SORT_H

#define mutt_numeric_cmp(a,b) ((a) < (b) ? -1 : ((a) > (b) ? 1 : 0))
 
/* `$sort` and `$sort_aux` are shorts, and are a composite of a constant sort
 * operation number and a set of compounded bitflags.
 *
 * Everything below SORT_MASK is a constant. There's room for SORT_MASK
 * constant SORT_ values.
 *
 * Everything above is a bitflag. It's OK to move SORT_MASK down by powers of 2
 * if we need more, so long as we don't collide with the constants above. (Or
 * we can just expand sort and sort_aux to uint32_t.)
 */
#define SORT_MASK    ((1 << 8) - 1) 
#define SORT_REVERSE  (1 << 8)      
#define SORT_LAST     (1 << 9)      
 
#endif /* MUTT_CONFIG_SORT_H */