1 /* nsp_seq.h 1.3 82/10/09 */ 2 3 /* 4 * NSP sequence numbers are 12 bit integers operated 5 * on with modular arithmetic. These macros can be 6 * used to compare and perform arithmetic on such integers. 7 */ 8 #define MAXSEQ (1<<12) 9 #define SEQMASK (MAXSEQ-1) 10 11 #define SEQ_LSS(a, b) (nsp_seqcmp(a, b) < 0) 12 #define SEQ_LEQ(a, b) (nsp_seqcmp(a, b) <= 0) 13 #define SEQ_GTR(a, b) (nsp_seqcmp(a, b) > 0) 14 #define SEQ_GEQ(a, b) (nsp_seqcmp(a, b) >= 0) 15 16 #define SEQ_ADD(a, b) (((a) + (b)) & SEQMASK) 17 #define SEQ_SUB(a, b) (((a) - (b)) & SEQMASK) 18