COMMON: Add an exists function to MacResManager

2 files changed, 28 insertions, 0 deletions

diff --git a/common/macresman.cpp b/common/macresman.cpp
index 1317600cb7..14bdfa7080 100644
--- a/common/macresman.cpp
+++ b/common/macresman.cpp
@@ -238,6 +238,27 @@ bool MacResManager::open(FSNode path, String filename) {
 	return false;
 }
 
+bool MacResManager::exists(const String &filename) {
+	// Try the file name by itself
+	if (Common::File::exists(filename))
+		return true;
+
+	// Try the .rsrc extension
+	if (Common::File::exists(filename + ".rsrc"))
+		return true;
+
+	// Check if we have a MacBinary file
+	Common::File tempFile;
+	if (tempFile.open(filename + ".bin") && isMacBinary(tempFile))
+		return true;
+
+	// Check if we have an AppleDouble file
+	if (tempFile.open("._" + filename) && tempFile.readUint32BE() == 0x00051607)
+		return true;
+
+	return false;
+}
+
 bool MacResManager::loadFromAppleDouble(SeekableReadStream &stream) {
 	if (stream.readUint32BE() != 0x00051607) // tag
 		return false;
diff --git a/common/macresman.h b/common/macresman.h
index 4d86e46d11..6820106925 100644
--- a/common/macresman.h
+++ b/common/macresman.h
@@ -69,6 +69,13 @@ public:
 	bool open(FSNode path, String filename);
 
 	/**
+	 * See if a Mac data/resource fork pair exists.
+	 * @param filename The base file name of the file
+	 * @return True if either a data fork or resource fork with this name exists
+	 */
+	static bool exists(const String &filename);
+
+	/**
 	 * Close the Mac data/resource fork pair.
 	 */
 	void close();