Add a ZipArchiveStreamEntry class.

This allows someone to stream the data out of a zip archive
instead of extracting to a file or to memory.

Included in this change is a small cleanup of the makefile.

Change-Id: I8b679a679c3502ff4ea0bc4f9e918303657fa424
diff --git a/libziparchive/Android.mk b/libziparchive/Android.mk
index 8a4921f..056b3e1 100644
--- a/libziparchive/Android.mk
+++ b/libziparchive/Android.mk
@@ -15,34 +15,46 @@
 
 LOCAL_PATH := $(call my-dir)
 
-source_files := zip_archive.cc zip_writer.cc
-test_files := zip_archive_test.cc zip_writer_test.cc entry_name_utils_test.cc
+libziparchive_source_files := \
+    zip_archive.cc \
+    zip_archive_stream_entry.cc \
+    zip_writer.cc \
+
+libziparchive_test_files := \
+    entry_name_utils_test.cc \
+    zip_archive_test.cc \
+    zip_writer_test.cc \
 
 # ZLIB_CONST turns on const for input buffers, which is pretty standard.
-common_c_flags := -Werror -Wall -DZLIB_CONST
+libziparchive_common_c_flags := \
+    -DZLIB_CONST \
+    -Werror \
+    -Wall \
 
 # Incorrectly warns when C++11 empty brace {} initializer is used.
 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61489
-common_cpp_flags := -Wold-style-cast -Wno-missing-field-initializers
+libziparchive_common_cpp_flags := \
+    -Wold-style-cast \
+    -Wno-missing-field-initializers \
 
 include $(CLEAR_VARS)
 LOCAL_CPP_EXTENSION := .cc
-LOCAL_SRC_FILES := ${source_files}
+LOCAL_SRC_FILES := $(libziparchive_source_files)
 LOCAL_STATIC_LIBRARIES := libz
 LOCAL_SHARED_LIBRARIES := libutils libbase
 LOCAL_MODULE:= libziparchive
-LOCAL_CFLAGS := $(common_c_flags)
-LOCAL_CPPFLAGS := $(common_cpp_flags)
+LOCAL_CFLAGS := $(libziparchive_common_c_flags)
+LOCAL_CPPFLAGS := $(libziparchive_common_cpp_flags)
 include $(BUILD_STATIC_LIBRARY)
 
 include $(CLEAR_VARS)
 LOCAL_CPP_EXTENSION := .cc
-LOCAL_SRC_FILES := ${source_files}
+LOCAL_SRC_FILES := $(libziparchive_source_files)
 LOCAL_STATIC_LIBRARIES := libz libutils libbase
 LOCAL_MODULE:= libziparchive-host
-LOCAL_CFLAGS := $(common_c_flags)
+LOCAL_CFLAGS := $(libziparchive_common_c_flags)
 LOCAL_CFLAGS_windows := -mno-ms-bitfields
-LOCAL_CPPFLAGS := $(common_cpp_flags)
+LOCAL_CPPFLAGS := $(libziparchive_common_cpp_flags)
 
 LOCAL_MULTILIB := both
 LOCAL_MODULE_HOST_OS := darwin linux windows
@@ -50,12 +62,12 @@
 
 include $(CLEAR_VARS)
 LOCAL_CPP_EXTENSION := .cc
-LOCAL_SRC_FILES := ${source_files}
+LOCAL_SRC_FILES := $(libziparchive_source_files)
 LOCAL_STATIC_LIBRARIES := libutils
 LOCAL_SHARED_LIBRARIES := libz-host liblog libbase
 LOCAL_MODULE:= libziparchive-host
-LOCAL_CFLAGS := $(common_c_flags)
-LOCAL_CPPFLAGS := $(common_cpp_flags)
+LOCAL_CFLAGS := $(libziparchive_common_c_flags)
+LOCAL_CPPFLAGS := $(libziparchive_common_cpp_flags)
 LOCAL_MULTILIB := both
 include $(BUILD_HOST_SHARED_LIBRARY)
 
@@ -63,21 +75,33 @@
 include $(CLEAR_VARS)
 LOCAL_MODULE := ziparchive-tests
 LOCAL_CPP_EXTENSION := .cc
-LOCAL_CFLAGS := $(common_c_flags)
-LOCAL_CPPFLAGS := $(common_cpp_flags)
-LOCAL_SRC_FILES := $(test_files)
-LOCAL_SHARED_LIBRARIES := liblog libbase
-LOCAL_STATIC_LIBRARIES := libziparchive libz libutils
+LOCAL_CFLAGS := $(libziparchive_common_c_flags)
+LOCAL_CPPFLAGS := $(libziparchive_common_cpp_flags)
+LOCAL_SRC_FILES := $(libziparchive_test_files)
+LOCAL_SHARED_LIBRARIES := \
+    libbase \
+    liblog \
+
+LOCAL_STATIC_LIBRARIES := \
+    libziparchive \
+    libz \
+    libutils \
+
 include $(BUILD_NATIVE_TEST)
 
 include $(CLEAR_VARS)
 LOCAL_MODULE := ziparchive-tests-host
 LOCAL_CPP_EXTENSION := .cc
-LOCAL_CFLAGS := $(common_c_flags)
-LOCAL_CPPFLAGS := -Wno-unnamed-type-template-args $(common_cpp_flags)
-LOCAL_SRC_FILES := $(test_files)
-LOCAL_SHARED_LIBRARIES := libziparchive-host liblog libbase
+LOCAL_CFLAGS := $(libziparchive_common_c_flags)
+LOCAL_CPPFLAGS := -Wno-unnamed-type-template-args $(libziparchive_common_cpp_flags)
+LOCAL_SRC_FILES := $(libziparchive_test_files)
+LOCAL_SHARED_LIBRARIES := \
+    libziparchive-host \
+    liblog \
+    libbase \
+
 LOCAL_STATIC_LIBRARIES := \
+    libutils \
     libz \
-    libutils
+
 include $(BUILD_HOST_NATIVE_TEST)