fix warnings around size_t/int

src/core/SkPackBits.cpp

Index: src/core/SkPackBits.cpp
diff --git a/src/core/SkPackBits.cpp b/src/core/SkPackBits.cpp
index 7a1444b14c0c24bfa955d7fda1cae2a28b66a0d4..3c6197b6f27fff829e816f6cb85d9f31a0ba3d28 100644
--- a/src/core/SkPackBits.cpp
+++ b/src/core/SkPackBits.cpp
@@ -10,7 +10,7 @@
 #define GATHER_STATSx
 
 static inline void small_memcpy(void* SK_RESTRICT dst,
-                                const void* SK_RESTRICT src, int n) {
+                                const void* SK_RESTRICT src, size_t n) {
     SkASSERT(n > 0 && n <= 15);
     uint8_t* d = (uint8_t*)dst;
     const uint8_t* s = (const uint8_t*)src;
@@ -34,7 +34,7 @@ static inline void small_memcpy(void* SK_RESTRICT dst,
     }
 }
 
-static inline void small_memset(void* dst, uint8_t value, int n) {
+static inline void small_memset(void* dst, uint8_t value, size_t n) {
     SkASSERT(n > 0 && n <= 15);
     uint8_t* d = (uint8_t*)dst;
     switch (n) {
@@ -196,7 +196,7 @@ size_t SkPackBits::Pack16(const uint16_t* SK_RESTRICT src, int count,
     const uint16_t* stop = src + count;
 
     for (;;) {
-        count = stop - src;
+        count = SkToInt(stop - src);
         SkASSERT(count >= 0);
         if (count == 0) {
             return dst - origDst;
@@ -218,7 +218,7 @@ size_t SkPackBits::Pack16(const uint16_t* SK_RESTRICT src, int count,
                     break;
                 }
             } while (*s == value);
-            dst = flush_same16(dst, value, s - src);
+            dst = flush_same16(dst, value, SkToInt(s - src));
         } else {    // accumulate diff values...
             do {
                 if (++s == stop) {
@@ -227,7 +227,7 @@ size_t SkPackBits::Pack16(const uint16_t* SK_RESTRICT src, int count,
             } while (*s != s[-1]);
             s -= 1; // back up so we don't grab one of the "same" values that follow
         FLUSH_DIFF:
-            dst = flush_diff16(dst, src, s - src);
+            dst = flush_diff16(dst, src, SkToInt(s - src));
         }
         src = s;
     }
@@ -239,7 +239,7 @@ size_t SkPackBits::Pack8(const uint8_t* SK_RESTRICT src, int count,
     const uint8_t* stop = src + count;
 
     for (;;) {
-        count = stop - src;
+        count = SkToInt(stop - src);
         SkASSERT(count >= 0);
         if (count == 0) {
             return dst - origDst;
@@ -260,7 +260,7 @@ size_t SkPackBits::Pack8(const uint8_t* SK_RESTRICT src, int count,
                     break;
                 }
             } while (*s == value);
-            dst = flush_same8(dst, value, s - src);
+            dst = flush_same8(dst, value, SkToInt(s - src));
         } else {    // accumulate diff values...
             do {
                 if (++s == stop) {
@@ -271,7 +271,7 @@ size_t SkPackBits::Pack8(const uint8_t* SK_RESTRICT src, int count,
             } while (*s != s[-1] || s[-1] != s[-2]);
             s -= 2; // back up so we don't grab the "same" values that follow
         FLUSH_DIFF:
-            dst = flush_diff8(dst, src, s - src);
+            dst = flush_diff8(dst, src, SkToInt(s - src));
         }
         src = s;
     }
@@ -298,7 +298,7 @@ int SkPackBits::Unpack16(const uint8_t* SK_RESTRICT src, size_t srcSize,
         dst += n;
     }
     SkASSERT(src == stop);
-    return dst - origDst;
+    return SkToInt(dst - origDst);
 }
 
 int SkPackBits::Unpack8(const uint8_t* SK_RESTRICT src, size_t srcSize,
@@ -319,7 +319,7 @@ int SkPackBits::Unpack8(const uint8_t* SK_RESTRICT src, size_t srcSize,
         dst += n;
     }
     SkASSERT(src == stop);
-    return dst - origDst;
+    return SkToInt(dst - origDst);
 }
 
 enum UnpackState {
@@ -339,7 +339,7 @@ void SkPackBits::Unpack8(uint8_t* SK_RESTRICT dst, size_t dstSkip,
 
     // state 1: do the skip-loop
     while (dstSkip > 0) {
-        unsigned n = *src++;
+        size_t n = *src++;
         if (n <= 127) {   // repeat count (n + 1)
             n += 1;
             if (n > dstSkip) {
@@ -387,7 +387,7 @@ void SkPackBits::Unpack8(uint8_t* SK_RESTRICT dst, size_t dstSkip,
 
     // copy at most dstWrite bytes into dst[]
     while (dstWrite > 0) {
-        unsigned n = *src++;
+        size_t n = *src++;
         if (n <= 127) {   // repeat count (n + 1)
             n += 1;
             if (n > dstWrite) {