Define intX as standard exact-width integer types.

Fixes https://github.com/google/protobuf/issues/823

Change-Id: I7f4c2bfcac2f81d8b34c030dd3d12ea02aaa2264

src/google/protobuf/stubs/port.h

@@ -109,15 +109,15 @@ typedef unsigned __int16 uint16;
 typedef unsigned __int32 uint32;
 typedef unsigned __int64 uint64;
 #else
-typedef signed char  int8;
-typedef short int16;
-typedef int int32;
-typedef long long int64;
-
-typedef unsigned char  uint8;
-typedef unsigned short uint16;
-typedef unsigned int uint32;
-typedef unsigned long long uint64;
+typedef int8_t int8;
+typedef int16_t int16;
+typedef int32_t int32;
+typedef int64_t int64;
+
+typedef uint8_t uint8;
+typedef uint16_t uint16;
+typedef uint32_t uint32;
+typedef uint64_t uint64;
 #endif
 
 // long long macros to be used because gcc and vc++ use different suffixes,
@@ -131,8 +131,10 @@ typedef unsigned long long uint64;
 #define GOOGLE_ULONGLONG(x) x##UI64
 #define GOOGLE_LL_FORMAT "I64"  // As in printf("%I64d", ...)
 #else
-#define GOOGLE_LONGLONG(x) x##LL
-#define GOOGLE_ULONGLONG(x) x##ULL
+// By long long, we actually mean int64.
+#define GOOGLE_LONGLONG(x) INT64_C(x)
+#define GOOGLE_ULONGLONG(x) UINT64_C(x)
+// Used to format real long long integers.
 #define GOOGLE_LL_FORMAT "ll"  // As in "%lld". Note that "q" is poor form also.
 #endif
 

src/google/protobuf/util/time_util.cc

@@ -142,6 +142,13 @@ int64 RoundTowardZero(int64 value, int64 divider) {
 }
 }  // namespace
 
+// Actually define these static const integers. Required by C++ standard (but
+// omitting them may still work with some compilers).
+const int64 TimeUtil::kTimestampMinSeconds;
+const int64 TimeUtil::kTimestampMaxSeconds;
+const int64 TimeUtil::kDurationMaxSeconds;
+const int64 TimeUtil::kDurationMinSeconds;
+
 string TimeUtil::ToString(const Timestamp& timestamp) {
   return FormatTime(timestamp.seconds(), timestamp.nanos());
 }
@@ -174,7 +181,7 @@ string TimeUtil::ToString(const Duration& duration) {
     seconds = -seconds;
     nanos = -nanos;
   }
-  result += StringPrintf("%" GOOGLE_LL_FORMAT "d", seconds);
+  result += SimpleItoa(seconds);
   if (nanos != 0) {
     result += "." + FormatNanos(nanos);
   }