1 files changed, 211 insertions, 0 deletions
diff --git a/lib/common/FdGetLine.cpp b/lib/common/FdGetLine.cpp
new file mode 100755
index 00000000..dee02604
--- /dev/null
+++ b/lib/common/FdGetLine.cpp
@@ -0,0 +1,211 @@
+// --------------------------------------------------------------------------
+//
+// File
+//		Name:    FdGetLine.cpp
+//		Purpose: Line based file descriptor reading
+//		Created: 2003/07/24
+//
+// --------------------------------------------------------------------------
+
+#include "Box.h"
+
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "FdGetLine.h"
+#include "CommonException.h"
+
+#include "MemLeakFindOn.h"
+
+// utility whitespace function
+inline bool iw(int c)
+{
+	return (c == ' ' || c == '\t' || c == '\v' || c == '\f'); // \r, \n are already excluded
+}
+
+
+// --------------------------------------------------------------------------
+//
+// Function
+//		Name:    FdGetLine::FdGetLine(int)
+//		Purpose: Constructor, taking file descriptor
+//		Created: 2003/07/24
+//
+// --------------------------------------------------------------------------
+FdGetLine::FdGetLine(int fd)
+	: mFileHandle(fd),
+	  mLineNumber(0),
+	  mBufferBegin(0),
+	  mBytesInBuffer(0),
+	  mPendingEOF(false),
+	  mEOF(false)
+{
+	if(mFileHandle < 0) {THROW_EXCEPTION(CommonException, BadArguments)}
+	//printf("FdGetLine buffer size = %d\n", sizeof(mBuffer));
+}
+
+
+// --------------------------------------------------------------------------
+//
+// Function
+//		Name:    FdGetLine::~FdGetLine()
+//		Purpose: Destructor
+//		Created: 2003/07/24
+//
+// --------------------------------------------------------------------------
+FdGetLine::~FdGetLine()
+{
+}
+
+
+// --------------------------------------------------------------------------
+//
+// Function
+//		Name:    FdGetLine::GetLine(bool)
+//		Purpose: Returns a file from the file. If Preprocess is true, leading
+//				 and trailing whitespace is removed, and comments (after #)
+//				 are deleted.
+//		Created: 2003/07/24
+//
+// --------------------------------------------------------------------------
+std::string FdGetLine::GetLine(bool Preprocess)
+{
+	if(mFileHandle == -1) {THROW_EXCEPTION(CommonException, GetLineNoHandle)}
+
+	// EOF?
+	if(mEOF) {THROW_EXCEPTION(CommonException, GetLineEOF)}
+	
+	std::string r;
+
+	bool foundLineEnd = false;
+
+	while(!foundLineEnd && !mEOF)
+	{
+		// Use any bytes left in the buffer
+		while(mBufferBegin < mBytesInBuffer)
+		{
+			int c = mBuffer[mBufferBegin++];
+			if(c == '\r')
+			{
+				// Ignore nasty Windows line ending extra chars
+			}
+			else if(c == '\n')
+			{
+				// Line end!
+				foundLineEnd = true;
+				break;
+			}
+			else
+			{
+				// Add to string
+				r += c;
+			}
+			
+			// Implicit line ending at EOF
+			if(mBufferBegin >= mBytesInBuffer && mPendingEOF)
+			{
+				foundLineEnd = true;
+			}
+		}
+		
+		// Check size
+		if(r.size() > FDGETLINE_MAX_LINE_SIZE)
+		{
+			THROW_EXCEPTION(CommonException, GetLineTooLarge)
+		}
+		
+		// Read more in?
+		if(!foundLineEnd && mBufferBegin >= mBytesInBuffer && !mPendingEOF)
+		{
+			int bytes = ::read(mFileHandle, mBuffer, sizeof(mBuffer));
+			
+			// Error?
+			if(bytes == -1)
+			{
+				THROW_EXCEPTION(CommonException, OSFileError)
+			}
+			
+			// Adjust buffer info
+			mBytesInBuffer = bytes;
+			mBufferBegin = 0;
+			
+			// EOF / closed?
+			if(bytes == 0)
+			{
+				mPendingEOF = true;
+			}
+		}
+		
+		// EOF?
+		if(mPendingEOF && mBufferBegin >= mBytesInBuffer)
+		{
+			// File is EOF, and now we've depleted the buffer completely, so tell caller as well.
+			mEOF = true;
+		}
+	}
+
+	if(!Preprocess)
+	{
+		return r;
+	}
+	else
+	{
+		// Check for comment char, but char before must be whitespace
+		int end = 0;
+		int size = r.size();
+		while(end < size)
+		{
+			if(r[end] == '#' && (end == 0 || (iw(r[end-1]))))
+			{
+				break;
+			}
+			end++;
+		}
+		
+		// Remove whitespace
+		int begin = 0;
+		while(begin < size && iw(r[begin]))
+		{
+			begin++;
+		}
+		if(!iw(r[end])) end--;
+		while(end > begin && iw(r[end]))
+		{
+			end--;
+		}
+		
+		// Return a sub string
+		return r.substr(begin, end - begin + 1);
+	}
+}
+
+
+// --------------------------------------------------------------------------
+//
+// Function
+//		Name:    FdGetLine::DetachFile()
+//		Purpose: Detaches the file handle, setting the file pointer correctly.
+//				 Probably not good for sockets...
+//		Created: 2003/07/24
+//
+// --------------------------------------------------------------------------
+void FdGetLine::DetachFile()
+{
+	if(mFileHandle == -1) {THROW_EXCEPTION(CommonException, GetLineNoHandle)}
+
+	// Adjust file pointer
+	int bytesOver = mBufferBegin - mBufferBegin;
+	ASSERT(bytesOver >= 0);
+	if(bytesOver > 0)
+	{
+		if(::lseek(mFileHandle, 0 - bytesOver, SEEK_CUR) == -1)
+		{
+			THROW_EXCEPTION(CommonException, OSFileError)
+		}
+	}
+
+	// Unset file pointer
+	mFileHandle = -1;
+}
+
+