New C++ helper classes.

This adds a few useful C++ helper classes to android/base/
that will be used in the future by other patches.

+ Add android/base/String.h, a slightly more efficient version
  of std::string.

+ Add android/base/containers/StringVector.h, an optimized
  vector of strings that is much more efficient than
  std::vector<std::string> and should use less memory.

+ Add android/base/containers/PodVector.h which defines
  an efficient std::vector<> equivalent for POD-struct
  compatible types.

+ Modify PathUtils.h to use StringVector instead of
  std::vector<std::string>.

+ Modify android/utils/file_data.c to get rid of valgrind
  complaints when running the unit test suite.

+ Add android/base/Limits.h to get reliable integer
  limit macros in C++.

Change-Id: Id9374aec658383c29be70a798ba17867664f69d3

Author: digit-android

Makefile.common

@@ -118,8 +118,11 @@ common_LOCAL_SRC_FILES += \
 	android/avd/util.c \
 	android/sockets.c \
 	android/sync-utils.c \
+	android/base/containers/PodVector.cpp \
+	android/base/containers/StringVector.cpp \
 	android/base/files/PathUtils.cpp \
 	android/base/Log.cpp \
+	android/base/String.cpp \
 	android/base/StringView.cpp \
 	android/filesystems/ext4_utils.cpp \
 	android/utils/assert.c \

Makefile.tests

@@ -7,11 +7,14 @@ EMULATOR_UNITTESTS_SOURCES := \
   android/utils/file_data_unittest.cpp \
   android/utils/property_file_unittest.cpp \
   android/utils/win32_cmdline_quote_unittest.cpp \
+  android/base/containers/PodVector_unittest.cpp \
+  android/base/containers/StringVector_unittest.cpp \
   android/base/EintrWrapper_unittest.cpp \
   android/base/files/PathUtils_unittest.cpp \
   android/base/files/ScopedStdioFile_unittest.cpp \
   android/base/Log_unittest.cpp \
   android/base/memory/ScopedPtr_unittest.cpp \
+  android/base/String_unittest.cpp \
   android/base/StringView_unittest.cpp \
   android/filesystems/ext4_utils_unittest.cpp \
 

android/base/Limits.h

@@ -0,0 +1,33 @@
+// Copyright 2014 The Android Open Source Project
+//
+// This software is licensed under the terms of the GNU General Public
+// License version 2, as published by the Free Software Foundation, and
+// may be copied, distributed, and modified under those terms.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+#ifndef ANDROID_BASE_LIMITS_H
+#define ANDROID_BASE_LIMITS_H
+
+// In C++, <stdint.h> will only define macros like SIZE_MAX if you have
+// defined __STDC_LIMIT_MACROS before including <stdint.h>. This header
+// is used to do just that and verify that the macros are properly
+// defined.
+//
+// NOTE: We have to define __STDC_FORMAT_MACROS in case the user wants
+//       to use the corresponding macros as well.
+
+#define __STDC_LIMIT_MACROS  1
+#define __STDC_FORMAT_MACROS 1
+#include <inttypes.h>
+
+#ifndef SIZE_MAX
+#warning "<inttypes.h> has been included before this header."
+#warning "This prevents the definition of useful macros."
+#error "Please include <android/base/Limits.h> first!"
+#endif
+
+#endif  // ANDROID_BASE_LIMITS_H