Make use of modern standard types

Summary: stdint.h defines the modern standard c types which have a fixed memory size. This makes the program run more predictably as well as removing the need to ugly double work types such as `unsigned int` or `long long`.

Reviewed By: lucasr

Differential Revision: D3649096

fbshipit-source-id: dc9fc8861c3106494c5d00d6ac337da50a4c945b

CSSLayout/CSSLayout-internal.h

@@ -10,9 +10,6 @@
 #ifndef __CSS_LAYOUT_INTERNAL_H
 #define __CSS_LAYOUT_INTERNAL_H
 
-#include <stdio.h>
-#include <stdlib.h>
-
 #include "CSSLayout.h"
 #include "CSSNodeList.h"
 
@@ -43,10 +40,10 @@ typedef struct CSSLayout {
 
   // Instead of recomputing the entire layout every single time, we
   // cache some information to break early when nothing changed
-  int generationCount;
+  uint32_t generationCount;
   CSSDirection lastParentDirection;
 
-  int nextCachedMeasurementsIndex;
+  uint32_t nextCachedMeasurementsIndex;
   CSSCachedMeasurement cachedMeasurements[CSS_MAX_CACHED_RESULT_COUNT];
   float measuredDimensions[2];
 
@@ -86,7 +83,7 @@ typedef struct CSSStyle {
 typedef struct CSSNode {
   CSSStyle style;
   CSSLayout layout;
-  int lineIndex;
+  uint32_t lineIndex;
   bool hasNewLayout;
   bool isTextNode;
   CSSNodeRef parent;