Add integer min/max constants to globals.h

runtime/platform/globals.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef PLATFORM_GLOBALS_H_
 #define PLATFORM_GLOBALS_H_
 
 // __STDC_FORMAT_MACROS has to be defined to enable platform independent printf.
 #ifndef __STDC_FORMAT_MACROS
 #define __STDC_FORMAT_MACROS
@@ skipping 112 matching lines @@
 #ifdef _MSC_VER
 #define DART_INT64_C(x) x##I64
 #define DART_UINT64_C(x) x##UI64
 #else
 #define DART_INT64_C(x) x##LL
 #define DART_UINT64_C(x) x##ULL
 #endif
 
 
 // The following macro works on both 32 and 64-bit platforms.
-// Usage: instead of writing 0x1234567890123456
+// Usage: instead of writing 0x1234567890123456ULL
 //      write DART_2PART_UINT64_C(0x12345678,90123456);
 #define DART_2PART_UINT64_C(a, b)                                              \
                  (((static_cast<uint64_t>(a) << 32) + 0x##b##u))
 
+// Integer constants.
+const int32_t kMinInt32 = 0x80000000;
+const int32_t kMaxInt32 = 0x7FFFFFFF;
+const uint32_t kMaxUint32 = 0xFFFFFFFF;
+const int64_t kMinInt64 = DART_INT64_C(0x8000000000000000);
+const int64_t kMaxInt64 = DART_INT64_C(0x7FFFFFFFFFFFFFFF);
+const uint64_t kMaxUint64 = DART_2PART_UINT64_C(0xFFFFFFFF, FFFFFFFF);
 
 // Types for native machine words. Guaranteed to be able to hold pointers and
 // integers.
 typedef intptr_t word;
 typedef uintptr_t uword;
 
 // Byte sizes.
 const int kWordSize = sizeof(word);
 #ifdef ARCH_IS_32_BIT
 const int kWordSizeLog2 = 2;
@@ skipping 183 matching lines @@
 // separate lines with body in {}s).
 # define TEMP_FAILURE_RETRY(expression)                                        \
     ({ int64_t __result;                                                       \
        do {                                                                    \
          __result = (int64_t) (expression);                                    \
        } while (__result == -1L && errno == EINTR);                            \
        __result; })
 #endif
 
 #endif  // PLATFORM_GLOBALS_H_