Code is all reorganized. We're about ready to release. I should write up a

little explenation of the arrangement.

1 files changed, 205 insertions, 0 deletions

diff --git a/src/stable/stream.h b/src/stable/stream.h
new file mode 100644
index 0000000..b35f6ee
--- /dev/null
+++ b/src/stable/stream.h
@@ -0,0 +1,205 @@
+/*
+ * Copyright (C) 2007-2011 Xagasoft, All rights reserved.
+ *
+ * This file is part of the libbu++ library and is released under the
+ * terms of the license contained in the file LICENSE.
+ */
+
+#ifndef BU_STREAM_H
+#define BU_STREAM_H
+
+#include "bu/config.h"
+
+#include <stdint.h>
+#include <stdio.h>
+
+#include "bu/string.h"
+
+namespace Bu
+{
+        /**
+         * The basis for a completely general data transport mechanism.  Anything
+         * that inherits from this should provide at least the basic read and/or
+         * write functions, and very probably the close function.  Any functions
+         * that aren't supported should throw an exception if called.
+         *
+         * The constructor of a child class should pretty much universally be used
+         * to open the stream.  I can't think of anything that should require an
+         * exception.
+         *@ingroup Streams
+         */
+        class Stream
+        {
+        public:
+                Stream();
+                virtual ~Stream();
+
+                /**
+                 * Close the stream.
+                 */
+                virtual void close() = 0;
+
+                /**
+                 * Read data from the stream into a buffer.
+                 *@param pBuf (void *) Buffer which will be filled.
+                 *@param nBytes (size_t) Max data to read.
+                 *@returns (size_t) Amount of data read.
+                 */
+                virtual size read( void *pBuf, size iBytes ) = 0;
+
+                /**
+                 * Attempts to read a complete line from the stream.  This will stop
+                 * reading when it has reached the end of the stream, or runs out of
+                 * data in a non-blocking stream.
+                 *@returns The line read, not including newline character.
+                 */
+                virtual Bu::String readLine();
+
+                /**
+                 * Reads all data from the current position onward until isEos returns
+                 * true and returns it as a Bu::String.  This will also return if no
+                 * data is available and the stream is in non-blocking mode.  This
+                 * function is intended for very particular circumstances and is often
+                 * not the most efficient way to access the data that you would like.
+                 *@returns The entire stream contents.
+                 */
+                virtual Bu::String readAll();
+
+                /**
+                 * Write data to the stream.
+                 *@param pBuf (const void *) The data to be written.
+                 *@param nBytes (size_t) Amount of data to write from pBuf.
+                 *@returns (size_t) Amount of data actually written.
+                 */
+                virtual size write( const void *pBuf, size iBytes ) = 0;
+
+                virtual size write( const Bu::String &sBuf );
+
+                /**
+                 * Get the current position in the stream.
+                 *@returns (long) The current position in the stream.
+                 */
+                virtual size tell() = 0;
+
+                /**
+                 * Seek to a position in the stream relative to the current position.
+                 *@param offset (long) Offset from current position to seek to.
+                 */
+                virtual void seek( size offset ) = 0;
+
+                /**
+                 * Set position in the stream relative to the start of the stream.
+                 *@param pos (long) The position.
+                 */
+                virtual void setPos( size pos ) = 0;
+
+                /**
+                 * Set position in the stream relative to the end of the stream.
+                 *@param pos (long) The position.
+                 */
+                virtual void setPosEnd( size pos ) = 0;
+
+                /**
+                 * Are we at the end of the stream?
+                 *@returns (bool) Are we at the end of the stream?
+                 */
+                virtual bool isEos() = 0;
+
+                /**
+                 * Is the stream open?
+                 *@returns (bool) Is the stream open?
+                 */
+                virtual bool isOpen() = 0;
+
+                /**
+                 * Flush any data still held in buffers.
+                 */
+                virtual void flush() = 0;
+
+                /**
+                 * In non-blocking streams this indicates if a read operation will
+                 * return data at the moment or not.  In blocking streams this should
+                 * return the same value as isEos().
+                 */
+                virtual bool canRead() = 0;
+
+                /**
+                 * In non-blocking streams this indicates if a write operation will
+                 * actually write one or more bytes.  In some cases writing is not
+                 * allowed (e.g. internal buffers are full) temporarilly.  In blocking
+                 * streams this should return the same value as isWritable.
+                 */
+                virtual bool canWrite() = 0;
+
+                /**
+                 * Indicates if the stream is capable of read operations.  This does not
+                 * indicate if such operations will return useful data, see canRead for
+                 * that.
+                 */
+                virtual bool isReadable() = 0;
+
+                /**
+                 * Indicates if the stream is capable of write operations.  This does
+                 * not indicate if such operations will succeed or fail, see canWrite
+                 * for that.
+                 */
+                virtual bool isWritable() = 0;
+
+                /**
+                 * Indicates if the stream is capable of seek operations.  This is
+                 * generally false for non-blocking streams.  Some buffered streams may
+                 * support limited in-buffer seeking.
+                 */
+                virtual bool isSeekable() = 0;
+
+                /**
+                 * Are we currently set to block mode?
+                 *@returns (bool)
+                 */
+                virtual bool isBlocking() = 0;
+
+                /**
+                 * Set stream to blocking or non-blocking mode.
+                 *@param bBlocking (bool) Whether we should block or not.
+                 */
+                virtual void setBlocking( bool bBlocking=true ) = 0;
+
+                /**
+                 * Set the size of the stream, this does not apply to many types of
+                 * streams.  For those that it does apply to, data will be added or
+                 * removed from the end of the stream, but the content of the added
+                 * data is undefined.
+                 */
+                virtual void setSize( size iSize ) = 0;
+
+                /**
+                 * Returns the size of the stream if the stream can have a size.  For
+                 * streams that do not (sockets, pipes, etc.) this should throw an
+                 * unsupported exception.
+                 */
+                virtual size getSize() const = 0;
+
+                /**
+                 * Returns the block-size of the stream, if it has one.  This should
+                 * throw an unsupported exception.  In some cases the block size
+                 * returned will not represent quite the same thing, for example,
+                 * sockets will return their MTU, while files will return the
+                 * filesystem's block size, and memory buffers will throw an exception.
+                 */
+                virtual size getBlockSize() const = 0;
+
+                /**
+                 * If possible, this returns a string that can be used to describe how
+                 * to access the open stream.  Not all streams support this, such as
+                 * MemBuf, but for files it may give you a path to a file, for a socket
+                 * it may give you an ip address, etc.  If it isn't supported, an empty
+                 * string may be returned.
+                 */
+                virtual Bu::String getLocation() const = 0;
+
+        private:
+
+        };
+}
+
+#endif