--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/io.h	Sat Jul 24 13:40:16 2010 +0100
@@ -0,0 +1,70 @@
+#ifndef IO_H
+#define IO_H
+/*=========================================================================*\
+* LuaSocket 2.0.2
+* Copyright (C) 2004-2007 Diego Nehab
+*
+* Input/Output abstraction
+*
+* This module defines the interface that LuaSocket expects from the
+* transport layer for streamed input/output. The idea is that if any
+* transport implements this interface, then the buffer.c functions
+* automatically work on it.
+*
+* The module socket.h implements this interface, and thus the module tcp.h
+* is very simple.
+*
+* RCS ID: $Id: io.h 6 2006-04-30 20:33:05Z brunoos $
+\*=========================================================================*/
+#include <stdio.h>
+#include <lua.h>
+
+#include "timeout.h"
+
+/* IO error codes */
+enum {
+    IO_DONE = 0,      /* operation completed successfully */
+    IO_TIMEOUT = -1,  /* operation timed out */
+    IO_CLOSED = -2,   /* the connection has been closed */
+    IO_UNKNOWN = -3,  /* Unknown error */
+    IO_SSL = -4       /* SSL error */
+};
+
+/* interface to error message function */
+typedef const char *(*p_error) (
+    void *ctx,          /* context needed by send */
+    int err             /* error code */
+);
+
+/* interface to send function */
+typedef int (*p_send) (
+    void *ctx,          /* context needed by send */
+    const char *data,   /* pointer to buffer with data to send */
+    size_t count,       /* number of bytes to send from buffer */
+    size_t *sent,       /* number of bytes sent uppon return */
+    p_timeout tm        /* timeout control */
+);
+
+/* interface to recv function */
+typedef int (*p_recv) (
+    void *ctx,          /* context needed by recv */
+    char *data,         /* pointer to buffer where data will be writen */
+    size_t count,       /* number of bytes to receive into buffer */
+    size_t *got,        /* number of bytes received uppon return */
+    p_timeout tm        /* timeout control */
+);
+
+/* IO driver definition */
+typedef struct t_io_ {
+    void *ctx;          /* context needed by send/recv */
+    p_send send;        /* send function pointer */
+    p_recv recv;        /* receive function pointer */
+    p_error error;      /* strerror function */
+} t_io;
+typedef t_io *p_io;
+
+void io_init(p_io io, p_send send, p_recv recv, p_error error, void *ctx);
+const char *io_strerror(int err);
+
+#endif /* IO_H */
+