There was a bug in my implementaion. No reason not to use the glibc version.

1 files changed, 1 insertions, 2 deletions

diff --git a/String.h b/String.h
index 0662aa18..cb7f1acc 100644
--- a/String.h
+++ b/String.h
@@ -10,6 +10,7 @@ in the source distribution for its full text.
 */
 
 #define String_startsWith(s, match) (strstr((s), (match)) == (s))
+#define String_contains_i(s1, s2) (strcasestr(s1, s2) != NULL)
 
 char* String_cat(const char* s1, const char* s2);
 
@@ -21,8 +22,6 @@ char** String_split(const char* s, char sep, int* n);
 
 void String_freeArray(char** s);
 
-int String_contains_i(const char* s, const char* match);
-
 char* String_getToken(const char* line, const unsigned short int numMatch);
 
 #endif