AnvilStats: Added ChunkExtract mode of operation, splitting Anvil files into individual chunks.

Both original zlibbed chunks and re-gzipped chunks are output.

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1223 0a769ca7-a7f5-676a-18bf-c427514a06d6

source/OSSupport/File.cpp

@@ -94,10 +94,9 @@ bool cFile::Open(const AString & iFileName, eMode iMode)
 
 void cFile::Close(void)
 {
-	ASSERT(IsOpen());  // You should not close file objects that don't have an open file.
-	
 	if (!IsOpen())
 	{
+		// Closing an unopened file is a legal nop
 		return;
 	}
 

source/OSSupport/GZipFile.cpp

@@ -85,7 +85,7 @@ int cGZipFile::ReadRestOfFile(AString & a_Contents)
 
 
 
-bool cGZipFile::Write(const AString & a_Contents)
+bool cGZipFile::Write(const char * a_Contents, int a_Size)
 {
 	if (m_File == NULL)
 	{
@@ -99,7 +99,7 @@ bool cGZipFile::Write(const AString & a_Contents)
 		return false;
 	}
 
-	return (gzwrite(m_File, a_Contents.data(), a_Contents.size()) != 0);
+	return (gzwrite(m_File, a_Contents, a_Size) != 0);
 }
 
 

source/OSSupport/GZipFile.h

@@ -37,7 +37,9 @@ public:
 	int ReadRestOfFile(AString & a_Contents);
 	
 	/// Writes a_Contents into file, compressing it along the way. Returns true if successful. Multiple writes are supported.
-	bool Write(const AString & a_Contents);
+	bool Write(const AString & a_Contents) { return Write(a_Contents.data(), (int)(a_Contents.size())); }
+	
+	bool Write(const char * a_Data, int a_Size);
 	
 protected:
 	gzFile m_File;