Added a more flexible path system (and fixed some minor stuff)

1 files changed, 160 insertions, 0 deletions

diff --git a/src/porting.cpp b/src/porting.cpp
new file mode 100644
index 000000000..bff865c53
--- /dev/null
+++ b/src/porting.cpp
@@ -0,0 +1,160 @@
+/*
+Minetest-c55
+Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+/*
+	Random portability stuff
+
+	See comments in porting.h
+*/
+
+#include "porting.h"
+
+namespace porting
+{
+
+std::string path_data = "../data";
+std::string path_userdata = "../";
+
+void pathRemoveFile(char *path, char delim)
+{
+	// Remove filename and path delimiter
+	int i;
+	for(i = strlen(path)-1; i>=0; i--)
+	{
+		if(path[i] == delim)
+			break;
+	}
+	path[i] = 0;
+}
+
+void initializePaths()
+{
+#ifdef RUN_IN_PLACE
+	/*
+		Use relative paths if RUN_IN_PLACE
+	*/
+
+	dstream<<"Using relative paths (RUN_IN_PLACE)"<<std::endl;
+
+	/*
+		Windows
+	*/
+	#if defined(_WIN32)
+		#include <windows.h>
+
+	const DWORD buflen = 1000;
+	char buf[buflen];
+	DWORD len;
+	
+	// Find path of executable and set path_data relative to it
+	len = GetModuleFileName(GetModuleHandle(NULL), buf, buflen);
+	assert(len < buflen);
+	pathRemoveFile(buf, '\\');
+
+	// Use "./bin/../data"
+	path_data = std::string(buf) + "/../data";
+		
+	// Use "./bin/../"
+	path_userdata = std::string(buf) + "/../";
+
+	/*
+		Linux
+	*/
+	#elif defined(linux)
+		#include <unistd.h>
+	
+	char buf[BUFSIZ];
+	// Get path to executable
+	readlink("/proc/self/exe", buf, BUFSIZ);
+	
+	pathRemoveFile(buf, '/');
+
+	// Use "./bin/../data"
+	path_data = std::string(buf) + "/../data";
+		
+	// Use "./bin/../"
+	path_userdata = std::string(buf) + "/../";
+	
+	/*
+		OS X
+	*/
+	#elif defined(__APPLE__)
+	
+	//TODO: Get path of executable. This assumes working directory is bin/
+	dstream<<"WARNING: Relative path not properly supported on OS X"
+			<<std::endl;
+	path_data = std::string("../data");
+	path_userdata = std::string("../");
+
+	#endif
+#else
+	/*
+		Use platform-specific paths otherwise
+	*/
+
+	dstream<<"Using system-wide paths (NOT RUN_IN_PLACE)"<<std::endl;
+
+	/*
+		Windows
+	*/
+	#if defined(_WIN32)
+		#include <windows.h>
+
+	const DWORD buflen = 1000;
+	char buf[buflen];
+	DWORD len;
+	
+	// Find path of executable and set path_data relative to it
+	len = GetModuleFileName(GetModuleHandle(NULL), buf, buflen);
+	assert(len < buflen);
+	pathRemoveFile(buf, '\\');
+	
+	// Use "./bin/../data"
+	path_data = std::string(buf) + "/../data";
+		
+	// Use "C:\Documents and Settings\user\Application Data\<APPNAME>"
+	len = GetEnvironmentVariable("APPDATA", buf, buflen);
+	assert(len < buflen);
+	path_userdata = std::string(buf) + "/" + APPNAME;
+
+	/*
+		Linux
+	*/
+	#elif defined(linux)
+	
+	path_userdata = std::string("~/.") + APPNAME;
+	path_data = std::string("/usr/share/") + APPNAME;
+	
+	/*
+		OS X
+	*/
+	#elif defined(__APPLE__)
+
+	path_userdata = std::string("~/Library/Application Support/") + APPNAME;
+	path_data = std::string("minetest-mac.app/Contents/Resources/data/");
+
+	#endif
+#endif
+
+	dstream<<"path_data = "<<path_data<<std::endl;
+	dstream<<"path_userdata = "<<path_userdata<<std::endl;
+}
+
+} //namespace porting
+