Clean up constructors

And, use C++ style casts and use float math functions rather than double ones to save memory space.

Also, stop using FloatMath and NativeUtils as standard Math methods are faster now.
See http://code.google.com/p/android/issues/detail?id=36199 and https://android-review.googlesource.com/40700

multi-project commit with I4259fb5ab8a15ac5760a7f04fc8f4c860529f04a

Change-Id: I0b81cff8c91769f7559a59b9528c75a5aabb4211
diff --git a/native/jni/src/char_utils.cpp b/native/jni/src/char_utils.cpp
index 45d49b0..fc0a059 100644
--- a/native/jni/src/char_utils.cpp
+++ b/native/jni/src/char_utils.cpp
@@ -885,16 +885,17 @@
 };
 
 static int compare_pair_capital(const void *a, const void *b) {
-    return (int)(*(unsigned short *)a)
-            - (int)((struct LatinCapitalSmallPair*)b)->capital;
+    return static_cast<int>(*reinterpret_cast<const unsigned short *>(a))
+            - static_cast<int>(
+                    (reinterpret_cast<const struct LatinCapitalSmallPair *>(b))->capital);
 }
 
 unsigned short latin_tolower(unsigned short c) {
     struct LatinCapitalSmallPair *p =
-            (struct LatinCapitalSmallPair *)bsearch(&c, SORTED_CHAR_MAP,
+            reinterpret_cast<struct LatinCapitalSmallPair *>(bsearch(&c, SORTED_CHAR_MAP,
                     sizeof(SORTED_CHAR_MAP) / sizeof(SORTED_CHAR_MAP[0]),
                     sizeof(SORTED_CHAR_MAP[0]),
-                    compare_pair_capital);
+                    compare_pair_capital));
     return p ? p->small : c;
 }
 } // namespace latinime