+ ok1(memrchr(haystack1, 'a', sizeof(haystack1)) == haystack1);
+ ok1(memrchr(haystack1, 'b', sizeof(haystack1)) == haystack1 + 1);
+ ok1(memrchr(haystack1, 'c', sizeof(haystack1)) == haystack1 + 2);
+ ok1(memrchr(haystack1, 'd', sizeof(haystack1)) == haystack1 + 3);
+ ok1(memrchr(haystack1, 'e', sizeof(haystack1)) == haystack1 + 5);
+ ok1(memrchr(haystack1, 'f', sizeof(haystack1)) == haystack1 + 6);
+ ok1(memrchr(haystack1, 'g', sizeof(haystack1)) == haystack1 + 7);
+ ok1(memrchr(haystack1, 'h', sizeof(haystack1)) == haystack1 + 8);
+ ok1(memrchr(haystack1, '\0', sizeof(haystack1)) == haystack1 + 9);
+ ok1(memrchr(haystack1, 'i', sizeof(haystack1)) == NULL);
+
+ ok1(memrchr(haystack2, 'a', sizeof(haystack2)) == haystack2 + 9);
+ ok1(memrchr(haystack2, 'b', sizeof(haystack2)) == haystack2 + 10);
+ ok1(memrchr(haystack2, '\0', sizeof(haystack2)) == haystack2 + 11);
+
+ ok1(memrchr(needle1, '\0', 2) == NULL);
+
+#define S(x) (x), sizeof(x) - 1
+ ok1(mempbrkm(S(haystack1), S("\0efgh")) == haystack1 + 4);
+ ok1(mempbrkm(S(haystack1), S("jklmn")) == NULL);
+ ok1(mempbrkm(S(haystack1), S("sd\0a")) == haystack1 + 0);
+
+ ok1(mempbrk(haystack1, sizeof(haystack1), "bcd\0a") == haystack1 + 1);
+ ok1(mempbrk(haystack1, sizeof(haystack1), "\0") == NULL);
+
+ ok1(memcchr(scan1, 'a', sizeof(scan1)) == scan1 + 4);
+ ok1(memcchr(scan1, 'b', sizeof(scan1)) == scan1);
+ ok1(memcchr(scan2, '\0', sizeof(scan2)) == scan2 + 3);
+ ok1(memcchr(scan2, '\0', sizeof(scan2) - 2) == NULL);
+
+ ok1(memeq(haystack1, sizeof(haystack1), haystack1, sizeof(haystack1)));
+ ok1(!memeq(haystack1, sizeof(haystack1), haystack2, sizeof(haystack2)));
+
+ ok1(memeqstr(scan1, sizeof(scan1) - 1, scan1));
+ ok1(!memeqstr(scan1, sizeof(scan1), scan1));
+ ok1(!memeqstr(scan1, sizeof(scan1), "aaaa"));
+
+ ok1(memstarts(S("a\0bcdef"), S("a\0bc")));
+ ok1(!memstarts(S("a\0bcdef"), S("a\0bcG")));
+ ok1(!memstarts(S("a\0bcdef"), S("a\0bcdefg")));
+
+ ok1(memstarts_str(scan1, sizeof(scan1), scan1));
+ ok1(!memstarts_str(scan1, sizeof(scan1), "ab"));
+
+ ok1(memends(S("abcdef"), S("abcdef")));
+ ok1(!memends(S("abcdef"), S("abcdefg")));
+ ok1(!memends(S("a\0bcdef"), S("a\0b")));
+ ok1(memends(S("a\0bcdef"), S("ef")));
+
+ ok1(memends_str(S("abcdef"), "abcdef"));
+ ok1(!memends_str(S("abcde\0f"), "d\0f"));
+ ok1(!memends_str(S("a\0bcdef"), "a"));
+ ok1(memends_str(S("a\0bcdef"), "ef"));
+
+ ok1(!memoverlaps(haystack1, sizeof(haystack1),
+ haystack2, sizeof(haystack2)));
+ ok1(!memoverlaps(haystack2, sizeof(haystack2),
+ haystack1, sizeof(haystack1)));
+ ok1(memoverlaps(haystack1, sizeof(haystack1), haystack1, 1));
+ ok1(memoverlaps(haystack1, 1, haystack1, sizeof(haystack1)));
+ ok1(memoverlaps(haystack1, sizeof(haystack1),
+ haystack1 + sizeof(haystack1) - 1, 1));
+ ok1(memoverlaps(haystack1 + sizeof(haystack1) - 1, 1,
+ haystack1, sizeof(haystack1)));
+ ok1(!memoverlaps(haystack1, sizeof(haystack1),
+ haystack1 + sizeof(haystack1), 1));
+ ok1(!memoverlaps(haystack1 + sizeof(haystack1), 1,
+ haystack1, sizeof(haystack1)));
+ ok1(!memoverlaps(haystack1, sizeof(haystack1), haystack1 - 1, 1));
+ ok1(!memoverlaps(haystack1 - 1, 1, haystack1, sizeof(haystack1)));
+ ok1(memoverlaps(haystack1, 5, haystack1 + 4, 7));
+ ok1(!memoverlaps(haystack1, 5, haystack1 + 5, 6));
+ ok1(memoverlaps(haystack1 + 4, 7, haystack1, 5));
+ ok1(!memoverlaps(haystack1 + 5, 6, haystack1, 5));
+