-/* os_compress: Compress a string with zlib. */
-int os_compress(char *src, char *dst, int src_size, int dst_size)
+#ifdef ZLIB_SYSTEM
+#include <zlib.h>
+#else
+#include "../external/zlib-1.2.11/zlib.h"
+#endif
+
+unsigned long int os_zlib_compress(const char *src, char *dst,
+ unsigned long int src_size,
+ unsigned long int dst_size)