Separate file utilities from utils.cc
Reduce the dependencies from utils.cc to arch/ subdirectories, etc.
Bug: 22322814
Test: make test-art-host
Change-Id: I4decd15ff4ec460735bfb58cebb1c6a1bf32b68f
diff --git a/runtime/base/file_utils.h b/runtime/base/file_utils.h
new file mode 100644
index 0000000..007f3b4
--- /dev/null
+++ b/runtime/base/file_utils.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_RUNTIME_BASE_FILE_UTILS_H_
+#define ART_RUNTIME_BASE_FILE_UTILS_H_
+
+#include <stdlib.h>
+
+#include <string>
+
+#include "arch/instruction_set.h"
+#include "base/logging.h"
+
+namespace art {
+
+bool ReadFileToString(const std::string& file_name, std::string* result);
+bool PrintFileToLog(const std::string& file_name, LogSeverity level);
+
+// Find $ANDROID_ROOT, /system, or abort.
+std::string GetAndroidRoot();
+// Find $ANDROID_ROOT, /system, or return an empty string.
+std::string GetAndroidRootSafe(std::string* error_msg);
+
+// Find $ANDROID_DATA, /data, or abort.
+const char* GetAndroidData();
+// Find $ANDROID_DATA, /data, or return null.
+const char* GetAndroidDataSafe(std::string* error_msg);
+
+// Returns the default boot image location (ANDROID_ROOT/framework/boot.art).
+// Returns an empty string if ANDROID_ROOT is not set.
+std::string GetDefaultBootImageLocation(std::string* error_msg);
+
+// Returns the dalvik-cache location, with subdir appended. Returns the empty string if the cache
+// could not be found.
+std::string GetDalvikCache(const char* subdir);
+// Return true if we found the dalvik cache and stored it in the dalvik_cache argument.
+// have_android_data will be set to true if we have an ANDROID_DATA that exists,
+// dalvik_cache_exists will be true if there is a dalvik-cache directory that is present.
+// The flag is_global_cache tells whether this cache is /data/dalvik-cache.
+void GetDalvikCache(const char* subdir, bool create_if_absent, std::string* dalvik_cache,
+ bool* have_android_data, bool* dalvik_cache_exists, bool* is_global_cache);
+
+// Returns the absolute dalvik-cache path for a DexFile or OatFile. The path returned will be
+// rooted at cache_location.
+bool GetDalvikCacheFilename(const char* file_location, const char* cache_location,
+ std::string* filename, std::string* error_msg);
+
+// Returns the system location for an image
+std::string GetSystemImageFilename(const char* location, InstructionSet isa);
+
+// Returns the vdex filename for the given oat filename.
+std::string GetVdexFilename(const std::string& oat_filename);
+
+// Returns true if the file exists.
+bool FileExists(const std::string& filename);
+bool FileExistsAndNotEmpty(const std::string& filename);
+
+// Returns `filename` with the text after the last occurrence of '.' replaced with
+// `extension`. If `filename` does not contain a period, returns a string containing `filename`,
+// a period, and `new_extension`.
+// Example: ReplaceFileExtension("foo.bar", "abc") == "foo.abc"
+// ReplaceFileExtension("foo", "abc") == "foo.abc"
+std::string ReplaceFileExtension(const std::string& filename, const std::string& new_extension);
+
+// Return the file size in bytes or -1 if the file does not exists.
+int64_t GetFileSizeBytes(const std::string& filename);
+
+// Madvise the largest page aligned region within begin and end.
+int MadviseLargestPageAlignedRegion(const uint8_t* begin, const uint8_t* end, int advice);
+
+} // namespace art
+
+#endif // ART_RUNTIME_BASE_FILE_UTILS_H_