WINTERMUTE: Clean up and comment base_disk_file.

1 files changed, 40 insertions, 36 deletions

diff --git a/engines/wintermute/base/file/base_disk_file.cpp b/engines/wintermute/base/file/base_disk_file.cpp
index 21f7c7c189..09a83f5768 100644
--- a/engines/wintermute/base/file/base_disk_file.cpp
+++ b/engines/wintermute/base/file/base_disk_file.cpp
@@ -46,43 +46,63 @@ void correctSlashes(char *fileName) {
 	}

 }

 

-bool diskFileExists(const Common::String& filename) {

-	// Try directly from SearchMan first

-	Common::ArchiveMemberList files;

-	SearchMan.listMatchingMembers(files, filename);

-	

-	for (Common::ArchiveMemberList::iterator it = files.begin(); it != files.end(); it++) {

-		if ((*it)->getName() == filename) {

-			return true;

-		}

-	}

+// Parse a relative path in the game-folder, and if it exists, return a FSNode to it.

+static Common::FSNode getNodeForRelativePath(const Common::String& filename) {

 	// The filename can be an explicit path, thus we need to chop it up, expecting the path the game

 	// specifies to follow the Windows-convention of folder\subfolder\file (absolute paths should not happen)

+

+	// Absolute path: TODO: Add specific fallbacks here.

 	if (filename.contains(':'))

 		error("openDiskFile::Absolute path or invalid filename used in %s", filename.c_str());

+

+	// Relative path:

 	if (filename.contains('\\')) {

 		Common::StringTokenizer path(filename, "\\");

-		

+

+		// Start traversing relative to the game-data-dir

 		const Common::FSNode gameDataDir(ConfMan.get("path"));

 		Common::FSNode curNode = gameDataDir;

+

+		// Parse all path-elements

 		while (!path.empty()) {

+			// Get the next path-component by slicing on '\\'

 			Common::String pathPart = path.nextToken();

+			// Get the next FSNode in the chain, if it exists as a child from the previous.

 			Common::FSNode nextNode(curNode.getChild(pathPart));

 			if (nextNode.exists() && nextNode.isReadable()) {

 				curNode = nextNode;

 			}

+			// Following the comments in common/fs.h, anything not a directory is a file.

 			if (!curNode.isDirectory()) {

-				if (curNode.exists() && curNode.isReadable())

-					return true;

-				else

-					return false;

+				assert(path.empty());

+				return curNode;

+				break;

 			}

 		}

 	}

+	// Return an invalid FSNode to mark that we didn't find the requested file.

+	return Common::FSNode();

+}

+

+bool diskFileExists(const Common::String& filename) {

+	// Try directly from SearchMan first

+	Common::ArchiveMemberList files;

+	SearchMan.listMatchingMembers(files, filename);

+	

+	for (Common::ArchiveMemberList::iterator it = files.begin(); it != files.end(); it++) {

+		if ((*it)->getName() == filename) {

+			return true;

+		}

+	}

+	// File wasn't found in SearchMan, try to parse the path as a relative path.

+	Common::FSNode searchNode = getNodeForRelativePath(filename);

+	if (searchNode.exists() && !searchNode.isDirectory() && searchNode.isReadable()) {

+		return true;

+	}

 	return false;

 }

 

-Common::SeekableReadStream *openDiskFile(const Common::String &filename, BaseFileManager *fileManager) {

+Common::SeekableReadStream *openDiskFile(const Common::String &filename) {

 	uint32 prefixSize = 0;

 	Common::SeekableReadStream *file = NULL;

 	// Try directly from SearchMan first

@@ -95,27 +115,11 @@ Common::SeekableReadStream *openDiskFile(const Common::String &filename, BaseFil
 			break;

 		}

 	}

-	// The filename can be an explicit path, thus we need to chop it up, expecting the path the game

-	// specifies to follow the Windows-convention of folder\subfolder\file (absolute paths should not happen)

+	// File wasn't found in SearchMan, try to parse the path as a relative path.

 	if (!file) {

-		if (filename.contains(':'))

-			error("openDiskFile::Absolute path or invalid filename used in %s", filename.c_str());

-		if (filename.contains('\\')) {

-			Common::StringTokenizer path(filename, "\\");

-

-			const Common::FSNode gameDataDir(ConfMan.get("path"));

-			Common::FSNode curNode = gameDataDir;

-			while (!path.empty()) {

-				Common::String pathPart = path.nextToken();

-				Common::FSNode nextNode(curNode.getChild(pathPart));

-				if (nextNode.exists() && nextNode.isReadable()) {

-					curNode = nextNode;

-				}

-				if (!curNode.isDirectory()) {

-					file = curNode.createReadStream();

-					break;

-				}

-			}

+		Common::FSNode searchNode = getNodeForRelativePath(filename);

+		if (searchNode.exists() && !searchNode.isDirectory() && searchNode.isReadable()) {

+			file = searchNode.createReadStream();

 		}

 	}

 	if (file) {