Added Caching for PreProcessed PNGs
Added a cache management system for pre-processed PNG files
along with unit tests. The cache system will be used if
the --no-crunch flag is passed to AAPT during the package
phase. The cache can be updated by a call to 'aapt crunch'
(see usage statement). Also put in benchmarking code.
Change-Id: I58271fb2ee2f5f9075fd74d4ff6f15e7afabd05c
diff --git a/tools/aapt/FileFinder.h b/tools/aapt/FileFinder.h
new file mode 100644
index 0000000..3f87aba
--- /dev/null
+++ b/tools/aapt/FileFinder.h
@@ -0,0 +1,78 @@
+//
+// Copyright 2011 The Android Open Source Project
+//
+
+// File Finder.
+// This is a collection of useful functions for finding paths and modification
+// times of files that match an extension pattern in a directory tree.
+// and finding files in it.
+
+#ifndef FILEFINDER_H
+#define FILEFINDER_H
+
+#include <utils/Vector.h>
+#include <utils/KeyedVector.h>
+#include <utils/String8.h>
+
+#include "DirectoryWalker.h"
+
+using namespace android;
+
+// Abstraction to allow for dependency injection. See MockFileFinder.h
+// for the testing implementation.
+class FileFinder {
+public:
+ virtual bool findFiles(String8 basePath, Vector<String8>& extensions,
+ KeyedVector<String8,time_t>& fileStore,
+ DirectoryWalker* dw) = 0;
+};
+
+class SystemFileFinder : public FileFinder {
+public:
+
+ /* findFiles takes a path, a Vector of extensions, and a destination KeyedVector
+ * and places path/modification date key/values pointing to
+ * all files with matching extensions found into the KeyedVector
+ * PRECONDITIONS
+ * path is a valid system path
+ * extensions should include leading "."
+ * This is not necessary, but the comparison directly
+ * compares the end of the path string so if the "."
+ * is excluded there is a small chance you could have
+ * a false positive match. (For example: extension "png"
+ * would match a file called "blahblahpng")
+ *
+ * POSTCONDITIONS
+ * fileStore contains (in no guaranteed order) paths to all
+ * matching files encountered in subdirectories of path
+ * as keys in the KeyedVector. Each key has the modification time
+ * of the file as its value.
+ *
+ * Calls checkAndAddFile on each file encountered in the directory tree
+ * Recursively descends into subdirectories.
+ */
+ virtual bool findFiles(String8 basePath, Vector<String8>& extensions,
+ KeyedVector<String8,time_t>& fileStore,
+ DirectoryWalker* dw);
+
+private:
+ /**
+ * checkAndAddFile looks at a single file path and stat combo
+ * to determine whether it is a matching file (by looking at
+ * the extension)
+ *
+ * PRECONDITIONS
+ * no setup is needed
+ *
+ * POSTCONDITIONS
+ * If the given file has a matching extension then a new entry
+ * is added to the KeyedVector with the path as the key and the modification
+ * time as the value.
+ *
+ */
+ static void checkAndAddFile(String8 path, const struct stat* stats,
+ Vector<String8>& extensions,
+ KeyedVector<String8,time_t>& fileStore);
+
+};
+#endif // FILEFINDER_H