Add utilities for converting from Host endianity to big endian and little endian formats for the va…

runtime/vm/os_android.cc

 // 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.
 
 #include "vm/globals.h"
 #if defined(TARGET_OS_ANDROID)
 
 #include "vm/os.h"
 
 #include <android/log.h>  // NOLINT
+#include <endian.h>  // NOLINT
 #include <errno.h>  // NOLINT
 #include <limits.h>  // NOLINT
 #include <malloc.h>  // NOLINT
 #include <time.h>  // NOLINT
 #include <sys/resource.h>  // NOLINT
 #include <sys/time.h>  // NOLINT
 #include <sys/types.h>  // NOLINT
 #include <unistd.h>  // NOLINT
 
 #include "platform/utils.h"
@@ skipping 295 matching lines @@
 void OS::DebugBreak() {
   UNIMPLEMENTED();
 }
 
 
 char* OS::StrNDup(const char* s, intptr_t n) {
   return strndup(s, n);
 }
 
 
+uint16_t HostToBigEndian16(uint16_t value) {
+  return htobe16(value);
+}
+
+
+uint32_t HostToBigEndian32(uint32_t value) {
+  return htobe32(value);
+}
+
+
+uint64_t HostToBigEndian64(uint64_t value) {
+  return htobe64(value);
+}
+
+
+uint16_t HostToLittleEndian16(uint16_t value) {
+  return htole16(value);
+}
+
+
+uint32_t HostToLittleEndian32(uint32_t value) {
+  return htole32(value);
+}
+
+
+uint64_t HostToLittleEndian64(uint64_t value) {
+  return htole64(value);
+}
+
+
 void OS::Print(const char* format, ...) {
   va_list args;
   va_start(args, format);
   VFPrint(stdout, format, args);
   // Forward to the Android log for remote access.
   __android_log_vprint(ANDROID_LOG_INFO, "DartVM", format, args);
   va_end(args);
 }
 
 
@@ skipping 85 matching lines @@
 }
 
 
 void OS::Exit(int code) {
   exit(code);
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_ANDROID)