Added working directory initializer.

git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/trunk@1027 4e206d99-4929-0410-ac5d-dfc041789085

src/SFML/System/Initializer.cpp

@@ -0,0 +1,108 @@
+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2007-2008 Lucas Soltic (elmerod@gmail.com) and Laurent Gomila (laurent.gom@gmail.com)
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Config.hpp>
+
+
+#ifdef SFML_SYSTEM_MACOS
+
+#include <CoreFoundation/CoreFoundation.h>
+#include <iostream>
+
+namespace
+{
+
+////////////////////////////////////////////////////////////
+/// Under Mac OS X, when launching an application from the Finder,
+/// the default working directory is the user home directory ;
+/// when launching from Xcode, the default one is the directory
+/// containing the application. In order to produce a uniform behaviour
+/// and simplify the use of resources, SFML sets the working directory to
+/// the Resources folder of the application bundle.
+/// The "constructor" attribute forces the function to be called
+/// at library loading time.
+////////////////////////////////////////////////////////////
+	
+void working_directory_initializer(void) __attribute__ ((constructor));
+void working_directory_initializer(void)
+{
+	char pathBuffer[4096];
+	
+	// Get the application bundle
+	CFBundleRef mainBundle = CFBundleGetMainBundle();
+	
+	if (!mainBundle)
+	{
+		std::cerr << "*** SFML: error getting the application main bundle" << std::endl;
+		return;
+	}
+	
+	// Get the resource directory URL
+	CFURLRef resourceDirectory = CFBundleCopyResourcesDirectoryURL(mainBundle);
+	
+	if (!resourceDirectory)
+	{
+		std::cerr << "*** SFML: error getting the resource directory of the main bundle" << std::endl;
+		return;
+	}
+	
+	// Convert it as absolute URL
+	CFURLRef absoluteURL = CFURLCopyAbsoluteURL(resourceDirectory);
+	
+	if (!absoluteURL)
+	{
+		std::cerr << "*** SFML: error gettint the resource directory as an absolute URL" << std::endl;
+		CFRelease(resourceDirectory);
+		return;
+	}
+	
+	// Get the POSIX style path
+	CFStringRef absolutePath = CFURLCopyFileSystemPath(absoluteURL, kCFURLPOSIXPathStyle);
+	
+	if (!absolutePath)
+	{
+		std::cerr << "*** SFML: error converting the resource directory URL as a POSIX path" << std::endl;
+		CFRelease(absoluteURL);
+		CFRelease(resourceDirectory);
+		return;
+	}
+	
+	// Get the path as C string and set it
+	if (CFStringGetCString(absolutePath, pathBuffer, 4096, kCFStringEncodingASCII))
+		chdir(pathBuffer);
+	else
+		std::cerr << "*** SFML: error copying the resource directory path in the C buffer" << std::endl;
+	
+	CFRelease(absolutePath);
+	CFRelease(absoluteURL);
+	CFRelease(resourceDirectory);
+}
+
+} // anonymous namespace
+
+#endif // SFML_SYSTEM_MACOS
+