58     const char * const needle[] = {"learned.", "unlearned.", "Unlearned"};  in main()  local
86     #define TEST_STRNSTR(haystack, needle, hay_length, expected) \  in main()  argument
87         ptr = av_strnstr(haystack, needle, hay_length); \  in main()
91     TEST_STRNSTR(haystack, needle [0], strlen(haystack), haystack+44);  in main()
92     TEST_STRNSTR(haystack, needle [1], strlen(haystack), haystack+42);  in main()
93     TEST_STRNSTR(haystack, needle [2], strlen(haystack), NULL       );  in main()
97     #define TEST_STRIREPLACE(haystack, needle, expected) \  in main()  argument
98         ptr = av_strireplace(haystack, needle, "instead"); \  in main()
107     TEST_STRIREPLACE(haystack, needle [0], "Education consists mainly in what we have uninstead");  in main()
108     TEST_STRIREPLACE(haystack, needle [1], "Education consists mainly in what we have instead");  in main()
109     TEST_STRIREPLACE(haystack, needle [2], "Education consists mainly in what we have instead.");  in main()
110     TEST_STRIREPLACE(haystack, needle [1], "Education consists mainly in what we have instead");  in main()