Lazily initialize functable members. (#108)

- Split functableInit() function as separate functions for each functable member, so we don't need to initialize full functable in multiple places in the zlib-ng code, or to check for NULL on every invocation.
- Optimized function for each functable member is detected on first invocation and the functable item is updated for subsequent invocations.
- Remove NULL check in adler32() and adler32_z() as it is no longer needed.

1 files changed, 0 insertions, 2 deletions

diff --git a/inflate.c b/inflate.c
index 68a41ac..1b5a554 100644
--- a/inflate.c
+++ b/inflate.c
@@ -187,8 +187,6 @@ int ZEXPORT inflateInit2_(z_stream *strm, int windowBits, const char *version, i
     int ret;
     struct inflate_state *state;
 
-    functableInit();
-
     if (version == NULL || version[0] != ZLIB_VERSION[0] || stream_size != (int)(sizeof(z_stream)))
         return Z_VERSION_ERROR;
     if (strm == NULL)