15  * 3. All advertising materials mentioning features or use of this software
48  * 3. Neither the name of the University nor the names of its contributors
94 #define DIFF_TYPE3 3
108 #define EFLAG_UNMERGED	3
123 static FILE *fp[3];
124 static int cline[3];		/* # of the last-read line in each file (0-2) */
126  * The latest known correspondence between line numbers of the 3 files
127  * is stored in last[1-3];
169 #define OPTIONS "3aAeEiL:mTxX"
178 	{ "easy-only",		no_argument,		NULL,	'3' },
189 	fprintf(stderr, "usage: diff3 [-3aAeEimTxX] [-L label1] [-L label2] "  in usage()
362 	struct diff *d1, *d2, *d3;  in merge()  local
366 	d1 = d13;  in merge()
371 		t1 = (d1 < d13 + m1);  in merge()
377 		if (!t2 || (t1 && d1->new.to < d2->new.from)) {  in merge()
381 				change(1, &d1->old, false);  in merge()
382 				keep(2, &d1->new);  in merge()
383 				change(3, &d1->new, false);  in merge()
387 			d1++;  in merge()
391 		if (!t1 || (t2 && d2->new.to < d1->new.from)) {  in merge()
395 				change(3, &d2->new, false);  in merge()
409 		if (d1 + 1 < d13 + m1 && d1->new.to >= d1[1].new.from) {  in merge()
410 			d1[1].old.from = d1->old.from;  in merge()
411 			d1[1].new.from = d1->new.from;  in merge()
412 			d1++;  in merge()
424 		if (d1->new.from == d2->new.from && d1->new.to == d2->new.to) {  in merge()
425 			dup = duplicate(&d1->old, &d2->old);  in merge()
431 				separate(dup ? "3" : "");  in merge()
432 				change(1, &d1->old, dup);  in merge()
434 				d3 = d1->old.to > d1->old.from ? d1 : d2;  in merge()
435 				change(3, &d3->new, false);  in merge()
437 				j = edit(d1, dup, j, DIFF_TYPE3);  in merge()
440 			d1++;  in merge()
448 		if (d1->new.from < d2->new.from) {  in merge()
449 			d2->old.from -= d2->new.from - d1->new.from;  in merge()
450 			d2->new.from = d1->new.from;  in merge()
451 		} else if (d2->new.from < d1->new.from) {  in merge()
452 			d1->old.from -= d1->new.from - d2->new.from;  in merge()
453 			d1->new.from = d2->new.from;  in merge()
455 		if (d1->new.to > d2->new.to) {  in merge()
456 			d2->old.to += d1->new.to - d2->new.to;  in merge()
457 			d2->new.to = d1->new.to;  in merge()
458 		} else if (d2->new.to > d1->new.to) {  in merge()
459 			d1->old.to += d2->new.to - d1->new.to;  in merge()
460 			d1->new.to = d2->new.to;  in merge()
519  * No difference was reported by diff between file 1 (or 2) and file 3,
529 	delta = last[3] - last[i];  in keep()
703  * between the 3 files bracket the changes. Regurgitate the diffs in reverse
897 	/* are the memset(3) calls needed? */  in increase()
945 		case '3':  in main()
966 			if (nblabels >= 3)  in main()
1009 	if (argc != 3) {  in main()