/* * A representation of character sets. * The array set.partitions defines set as follows: * If a character's unicode representation is * greater than an odd number of partitions, it is * in the set. If it is greater than an even number * of partitions, it is not in the set. * The array partitions is always terminated by UINT32_MAX = 4,294,967,295. */typedef struct character_set { uint32_t *parts;} charset;/*the union of a and b*/charset csunion(charset a, charset b);/*the intersection of a and b*/charset csintersection(charset a, charset b);/*the complement of a*/charset cscompl(charset a);/*1 if a contains c; 0 if a does not contain c*/int contains(charset a, uint32_t c);