Im Projektarchiv verschoben

git-svn-id: svn://svn.berlios.de/ffnetdev/trunk@5 1f4bef6d-8e0a-0410-8695-e467da8aaccf

8 files changed, 724 insertions, 0 deletions

diff --git a/tools/select.c b/tools/select.c
new file mode 100644
index 0000000..0ab5f9b
--- /dev/null
+++ b/tools/select.c
@@ -0,0 +1,49 @@
+#include "tools/select.h"
+
+#include <vdr/tools.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+#include <errno.h>
+
+cTBSelect::cTBSelect(void) {
+	Clear();
+}
+
+cTBSelect::~cTBSelect() {
+}
+
+int cTBSelect::Select(uint TimeoutMs) {
+	struct timeval tv;
+	ssize_t res;
+	int ms;
+
+	tv.tv_usec = (TimeoutMs % 1000) * 1000;
+	tv.tv_sec = TimeoutMs / 1000;
+
+	if (TimeoutMs == 0)
+		return ::select(m_MaxFiled + 1, &m_Rfds, &m_Wfds, NULL, &tv);
+
+	cTimeMs starttime;
+	ms = TimeoutMs;
+	while (ms > 0 && (res = ::select(m_MaxFiled + 1, &m_Rfds, &m_Wfds, NULL, 
+			&tv)) == -1 && errno == EINTR) {
+		ms = TimeoutMs - starttime.Elapsed();
+		tv.tv_usec = (ms % 1000) * 1000;
+		tv.tv_sec = ms / 1000;
+	}
+	if (ms <= 0) {
+		errno = ETIMEDOUT;
+		return -1;
+	}
+	return res;
+}
+
+int cTBSelect::Select(void) {
+	ssize_t res;
+	while ((res = ::select(m_MaxFiled + 1, &m_Rfds, &m_Wfds, NULL, NULL)) == -1
+			&& errno == EINTR)
+		;
+	return res;
+}
diff --git a/tools/select.h b/tools/select.h
new file mode 100644
index 0000000..7e873e2
--- /dev/null
+++ b/tools/select.h
@@ -0,0 +1,75 @@
+#ifndef TOOLBOX_SELECT_H
+#define TOOLBOX_SELECT_H
+
+#include "tools/tools.h"
+
+#include <sys/types.h>
+
+/* cTBSelect provides an interface for polling UNIX-like file descriptors. */
+
+class cTBSelect {
+private:
+	int    m_MaxFiled;
+
+	fd_set m_Rfds;
+	fd_set m_Wfds;
+
+public:
+	cTBSelect(void);
+	virtual ~cTBSelect();
+
+	/* Clear() resets the object for use in a new Select() call. All file 
+	   descriptors and their previous states are invalidated. */
+	virtual void Clear(void);
+
+	/* Add() adds a file descriptor to be polled in the next Select() call.
+	   That call polls if the file is readable if Output is set to false, 
+	   writeable otherwise. */
+	virtual bool Add(int Filed, bool Output = false);
+
+	/* Select() polls all descriptors added by Add() and returns as soon as
+	   one of those changes state (gets readable/writeable), or after
+	   TimeoutMs milliseconds, whichever happens first. It returns the number
+	   of filedescriptors that have changed state. On error, -1 is returned
+	   and errno is set appropriately. */
+	virtual int Select(uint TimeoutMs);
+
+	/* Select() polls all descriptors added by Add() and returns as soon as
+	   one of those changes state (gets readable/writeable). It returns the 
+	   number of filedescriptors that have changed state. On error, -1 is 
+	   returned and errno is set appropriately. */
+	virtual int Select(void);
+
+	/* CanRead() returns true if the descriptor has changed to readable during
+	   the last Select() call. Otherwise false is returned. */
+	virtual bool CanRead(int FileNo) const;
+
+	/* CanWrite() returns true if the descriptor has changed to writeable 
+	   during the last Select() call. Otherwise false is returned. */
+	virtual bool CanWrite(int FileNo) const;
+};
+
+inline void cTBSelect::Clear(void) {
+	FD_ZERO(&m_Rfds);
+	FD_ZERO(&m_Wfds);
+	m_MaxFiled = -1;
+}
+
+inline bool cTBSelect::Add(int Filed, bool Output /* = false */) {
+	if (Filed < 0) return false;
+	FD_SET(Filed, Output ? &m_Wfds : &m_Rfds);
+	if (Filed > m_MaxFiled) m_MaxFiled = Filed;
+	return true;
+}
+
+inline bool cTBSelect::CanRead(int FileNo) const {
+	if (FileNo < 0) return false;
+	return FD_ISSET(FileNo, &m_Rfds);
+}
+
+inline bool cTBSelect::CanWrite(int FileNo) const {
+	if (FileNo < 0) return false;
+	return FD_ISSET(FileNo, &m_Wfds);
+}
+
+#endif // TOOLBOX_SELECT_H
diff --git a/tools/socket.c b/tools/socket.c
new file mode 100644
index 0000000..3e3be65
--- /dev/null
+++ b/tools/socket.c
@@ -0,0 +1,135 @@
+#include "tools/socket.h"
+
+#include <string.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+
+cTBSocket::cTBSocket(int Type) {
+	memset(&m_LocalAddr, 0, sizeof(m_LocalAddr));
+	memset(&m_RemoteAddr, 0, sizeof(m_RemoteAddr));
+	m_Type = Type;
+}
+
+cTBSocket::~cTBSocket() {
+	if (IsOpen()) Close();
+}
+
+bool cTBSocket::Connect(const std::string &Host, unsigned int Port) {
+	socklen_t len;
+	int socket;
+
+	if (IsOpen()) Close();
+		
+	if ((socket = ::socket(PF_INET, m_Type, IPPROTO_IP)) == -1)
+		return false;
+
+	m_LocalAddr.sin_family = AF_INET;
+	m_LocalAddr.sin_port   = 0;
+	m_LocalAddr.sin_addr.s_addr = INADDR_ANY;
+	if (::bind(socket, (struct sockaddr*)&m_LocalAddr, sizeof(m_LocalAddr)) 
+			== -1)
+		return false;
+
+	m_RemoteAddr.sin_family = AF_INET;
+	m_RemoteAddr.sin_port   = htons(Port);
+	m_RemoteAddr.sin_addr.s_addr = inet_addr(Host.c_str());
+	if (::connect(socket, (struct sockaddr*)&m_RemoteAddr, 
+			sizeof(m_RemoteAddr)) == -1) 
+		return false;
+
+	len = sizeof(struct sockaddr_in);
+	if (::getpeername(socket, (struct sockaddr*)&m_RemoteAddr, &len) == -1) 
+		return false;
+	
+	len = sizeof(struct sockaddr_in);
+	if (::getsockname(socket, (struct sockaddr*)&m_LocalAddr, &len) == -1) 
+		return false;
+
+	return cTBSource::Open(socket);
+}
+
+bool cTBSocket::Listen(const std::string &Ip, unsigned int Port, int BackLog) {
+	int val;
+	socklen_t len;
+	int socket;
+
+	if (IsOpen()) Close();
+	
+	if ((socket = ::socket(PF_INET, m_Type, IPPROTO_IP)) == -1)
+		return false;
+
+	val = 1;
+	if (::setsockopt(socket, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) == -1)
+		return false;
+
+	m_LocalAddr.sin_family = AF_INET;
+	m_LocalAddr.sin_port   = htons(Port);
+	m_LocalAddr.sin_addr.s_addr = inet_addr(Ip.c_str());
+	if (::bind(socket, (struct sockaddr*)&m_LocalAddr, sizeof(m_LocalAddr)) 
+			== -1)
+		return false;
+
+	len = sizeof(struct sockaddr_in);
+	if (::getsockname(socket, (struct sockaddr*)&m_LocalAddr, &len) == -1) 
+		return false;
+	
+	if (m_Type == SOCK_STREAM && ::listen(socket, BackLog) == -1)
+		return false;
+	
+	if (!cTBSource::Open(socket))
+		return false;
+
+	return true;
+}
+
+bool cTBSocket::Accept(const cTBSocket &Listener) {
+	socklen_t addrlen;
+	int socket;
+
+	if (IsOpen()) Close();
+
+	addrlen = sizeof(struct sockaddr_in);
+	if ((socket = ::accept(Listener, (struct sockaddr*)&m_RemoteAddr,
+			&addrlen)) == -1)
+		return false;
+
+	addrlen = sizeof(struct sockaddr_in);
+	if (::getsockname(socket, (struct sockaddr*)&m_LocalAddr, &addrlen) == -1)
+		return false;
+	
+	if (!cTBSource::Open(socket))
+		return false;
+	
+	return true;
+}
+
+RETURNS(cTBSocket, cTBSocket::Accept(void) const, ret)
+	ret.Accept(*this);
+RETURN(ret)
+
+bool cTBSocket::Close(void) {
+	bool ret = true;
+	
+	if (!IsOpen())
+		ERRNUL(EBADF);
+
+	if (::close(*this) == -1)
+		ret = false;
+
+	if (!cTBSource::Close())
+		ret = false;
+
+	memset(&m_LocalAddr, 0, sizeof(m_LocalAddr));
+	memset(&m_RemoteAddr, 0, sizeof(m_RemoteAddr));
+
+	return ret;
+}
+
+bool cTBSocket::Shutdown(int how) {
+	if (!IsOpen())
+		ERRNUL(EBADF);
+
+	return ::shutdown(*this, how) != -1;
+}
diff --git a/tools/socket.h b/tools/socket.h
new file mode 100644
index 0000000..d1a7d62
--- /dev/null
+++ b/tools/socket.h
@@ -0,0 +1,108 @@
+#ifndef TOOLBOX_SOCKET_H
+#define TOOLBOX_SOCKET_H
+
+#include "tools/tools.h"
+#include "tools/source.h"
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string>
+
+/* cTBSocket provides a cTBSource-derived interface for input and output on
+   TCP/IPv4-sockets. */
+
+class cTBSocket: public cTBSource {
+private:
+	struct sockaddr_in m_LocalAddr;
+	struct sockaddr_in m_RemoteAddr;
+
+	int m_Type;
+
+public:
+	cTBSocket(int Type = SOCK_STREAM);
+	virtual ~cTBSocket();
+	
+	/* See cTBSource::SysRead() 
+	   Reimplemented for TCP/IPv4 sockets. */
+	virtual ssize_t SysRead(void *Buffer, size_t Length) const;
+
+	/* See cTBSource::SysWrite() 
+	   Reimplemented for TCP/IPv4 sockets. */
+	virtual ssize_t SysWrite(const void *Buffer, size_t Length) const;
+
+	/* Connect() tries to connect an available local socket to the port given
+	   by Port of the target host given by Host in numbers-and-dots notation
+	   (i.e. "212.43.45.21"). Returns true if the connection attempt was 
+	   successful and false otherwise, setting errno appropriately. */
+	virtual bool Connect(const std::string &Host, uint Port);
+
+	/* Shutdown() shuts down one or both ends of a socket. If called with How
+	   set to SHUT_RD, further reads on this socket will be denied. If called
+	   with SHUT_WR, all writes are denied. Called with SHUT_RDWR, all firther
+	   action on this socket will be denied. Returns true on success and false
+	   otherwise, setting errno appropriately. */
+	virtual bool Shutdown(int How);
+
+	/* Close() closes the associated socket and releases all structures. 
+	   Returns true on success and false otherwise, setting errno 
+	   appropriately. The object is in the closed state afterwards, regardless
+	   of any errors. */
+	virtual bool Close(void);
+
+	/* Listen() listens on the local port Port for incoming connections. The 
+	   BackLog parameter defines the maximum length the queue of pending 
+	   connections may grow to. Returns true if the object is listening on
+	   the specified port and false otherwise, setting errno appropriately. */
+	virtual bool Listen(const std::string &Ip, uint Port, int BackLog);
+
+	/* Accept() returns a newly created cTBSocket, which is connected to the 
+	   first connection request on the queue of pending connections of a
+	   listening socket. If no connection request was pending, or if any other
+	   error occured, the resulting cTBSocket is closed. */
+	virtual cTBSocket Accept(void) const;
+
+	/* Accept() extracts the first connection request on the queue of pending
+	   connections of the listening socket Listener and connects it to this
+	   object. Returns true on success and false otherwise, setting errno to
+	   an appropriate value. */
+	virtual bool Accept(const cTBSocket &Listener);
+
+	/* LocalPort() returns the port number this socket is connected to locally.
+	   The result is undefined for a non-open socket. */
+	int LocalPort(void) const { return ntohs(m_LocalAddr.sin_port); }
+
+	/* RemotePort() returns the port number this socket is connected to on the
+	   remote side. The result is undefined for a non-open socket. */
+	int RemotePort(void) const { return ntohs(m_RemoteAddr.sin_port); }
+
+	/* LocalIp() returns the internet address in numbers-and-dots notation of
+	   the interface this socket is connected to locally. This can be 
+	   "0.0.0.0" for a listening socket listening to all interfaces. If the
+	   socket is in its closed state, the result is undefined. */
+	std::string LocalIp(void) const { return inet_ntoa(m_LocalAddr.sin_addr); }
+
+	/* RemoteIp() returns the internet address in numbers-and-dots notation of
+	   the interface this socket is connected to on the remote side. If the
+	   socket is in its closed state, the result is undefined. */
+	std::string RemoteIp(void) const { return inet_ntoa(m_RemoteAddr.sin_addr); }
+
+	in_addr_t LocalIpAddr(void) const { return m_LocalAddr.sin_addr.s_addr; }
+	in_addr_t RemoteIpAddr(void) const { return m_RemoteAddr.sin_addr.s_addr; }
+
+	int Type(void) const { return m_Type; }
+};
+
+inline ssize_t cTBSocket::SysRead(void *Buffer, size_t Length) const {
+	if (m_Type == SOCK_DGRAM) {
+		socklen_t len = sizeof(m_RemoteAddr);
+		return ::recvfrom(*this, Buffer, Length, 0, (sockaddr*)&m_RemoteAddr, &len);
+	} else
+		return ::recv(*this, Buffer, Length, 0);
+}
+
+inline ssize_t cTBSocket::SysWrite(const void *Buffer, size_t Length) const {
+	return ::send(*this, Buffer, Length, 0);
+}
+
+#endif // TOOLBOX_SOCKET_H
diff --git a/tools/source.c b/tools/source.c
new file mode 100644
index 0000000..f8751b6
--- /dev/null
+++ b/tools/source.c
@@ -0,0 +1,169 @@
+#include "tools/source.h"
+#include "tools/select.h"
+
+#include <vdr/tools.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+
+cTBSource::cTBSource(void) {
+	m_BytesRead = 0;
+	m_BytesWritten = 0;
+	m_Filed = -1;
+}
+
+bool cTBSource::Open(int Filed, bool IsUnixFd) {
+	if (IsOpen())
+		Close();
+
+	m_Filed = Filed;
+	if (IsUnixFd && ::fcntl(m_Filed, F_SETFL, O_NONBLOCK) == -1)
+		return false;
+
+	return true;
+}
+
+cTBSource::~cTBSource() {
+}
+
+bool cTBSource::Close(void) {
+	if (!IsOpen()) {
+		errno = EBADF;
+		return false;
+	}
+
+	m_Filed = -1;
+	return true;
+}
+
+ssize_t cTBSource::Read(void *Buffer, size_t Length) {
+	ssize_t res;
+	while ((res = SysRead(Buffer, Length)) < 0 && errno == EINTR)
+		errno = 0;
+	if (res > 0) m_BytesRead += res;
+	return res;
+}
+
+ssize_t cTBSource::Write(const void *Buffer, size_t Length) {
+	ssize_t res;
+	while ((res = SysWrite(Buffer, Length)) < 0 && errno == EINTR)
+		errno = 0;
+	if (res > 0) m_BytesWritten += res;
+	return res;
+}
+
+bool cTBSource::TimedWrite(const void *Buffer, size_t Length, uint TimeoutMs) {
+	cTBSelect sel;
+	int ms, offs;
+
+	cTimeMs starttime;
+	ms = TimeoutMs;
+	offs = 0;
+	while (Length > 0) {
+		int b;
+
+		sel.Clear();
+		sel.Add(m_Filed, true);
+		if (sel.Select(ms) == -1)
+			return false;
+
+		if (sel.CanWrite(m_Filed)) {
+			if ((b = Write((char*)Buffer + offs, Length)) == -1)
+				return false;
+			offs += b;
+			Length -= b;
+		}
+
+		ms = TimeoutMs - starttime.Elapsed();
+		if (ms <= 0) {
+			errno = ETIMEDOUT;
+			return false;
+		}
+	}
+	return true;
+}
+
+bool cTBSource::SafeWrite(const void *Buffer, size_t Length) {
+	cTBSelect sel;
+	int offs;
+
+	offs = 0;
+	while (Length > 0) {
+		int b;
+
+		sel.Clear();
+		sel.Add(m_Filed, true);
+		if (sel.Select() == -1)
+			return false;
+
+		if (sel.CanWrite(m_Filed)) {
+			if ((b = Write((char*)Buffer + offs, Length)) == -1)
+				return false;
+			offs += b;
+			Length -= b;
+		}
+		
+	}
+	return true;
+}
+
+ssize_t cTBSource::ReadUntil(void *Buffer, size_t Length, const char *Seq,
+		uint TimeoutMs) {
+	int ms;
+	size_t len;
+	cTBSelect sel;
+
+	if ((len = m_LineBuffer.find(Seq)) != (size_t)-1) {
+		if (len > Length) {
+			errno = ENOBUFS;
+			return -1;
+		}
+		memcpy(Buffer, m_LineBuffer.data(), len);
+		m_LineBuffer.erase(0, len + strlen(Seq));
+		//Dprintf("ReadUntil: Served from Linebuffer: %d, |%.*s|\n", len, len - 1,
+		//		(char*)Buffer);
+		return len;
+	}
+
+	cTimeMs starttime;
+	ms = TimeoutMs;
+	while (m_LineBuffer.size() < BUFSIZ) {
+		sel.Clear();
+		sel.Add(m_Filed, false);
+
+		if (sel.Select(ms) == -1)
+			return -1;
+		
+		if (sel.CanRead(m_Filed)) {
+			int b;
+
+			len = m_LineBuffer.size();
+			m_LineBuffer.resize(BUFSIZ);
+			if ((b = Read((char*)m_LineBuffer.data() + len, BUFSIZ - len)) == -1)
+				return -1;
+			m_LineBuffer.resize(len + b);
+
+			if ((len = m_LineBuffer.find(Seq)) != (size_t)-1) {
+				if (len > Length) {
+					errno = ENOBUFS;
+					return -1;
+				}
+				memcpy(Buffer, m_LineBuffer.data(), len);
+				m_LineBuffer.erase(0, len + strlen(Seq));
+				//Dprintf("ReadUntil: Served from Linebuffer: %d, |%.*s|\n", len, len - 1,
+				//		(char*)Buffer);
+				return len;
+			}
+		}
+
+		ms = TimeoutMs - starttime.Elapsed();
+		if (ms <= 0) {
+			errno = ETIMEDOUT;
+			return -1;
+		}
+	}
+	errno = ENOBUFS;
+	return -1;
+}
+
diff --git a/tools/source.h b/tools/source.h
new file mode 100644
index 0000000..09c4bf3
--- /dev/null
+++ b/tools/source.h
@@ -0,0 +1,109 @@
+#ifndef TOOLBOX_SOURCE_H
+#define TOOLBOX_SOURCE_H
+
+#include "tools/tools.h"
+
+#include <sys/types.h>
+#include <string>
+
+/* cTBSource provides an abstract interface for input and output. It can
+   be used to have common access to different types of UNIX-files. */
+
+class cTBSource {
+private:
+	int m_Filed;
+
+	size_t m_BytesRead;
+	size_t m_BytesWritten;
+
+	std::string m_LineBuffer;
+
+public:
+	cTBSource(void);
+	virtual ~cTBSource();
+
+	/* SysRead() implements the low-level read on the source. It will store
+	   data into the area pointed to by Buffer, which is at least Length
+	   bytes in size. It will return the exact number of bytes read (which
+	   can be fewer than requested). On error, -1 is returned, and errno
+	   is set to an appropriate value. */
+	virtual ssize_t SysRead(void *Buffer, size_t Length) const = 0;
+
+	/* SysWrite() implements the low-level write on the source. It will write
+	   at most Length bytes of the data pointed to by Buffer. It will return 
+	   the exact number of bytes written (which can be fewer than requested). 
+	   On error, -1 is returned, and errno is set to an appropriate value. */
+	virtual ssize_t SysWrite(const void *Buffer, size_t Length) const = 0;
+
+	/* IsOpen() returns true, if this source refers to a valid descriptor. 
+	   It is not checked whether this source is really open, so only if 
+	   opened by the appropriate Methods this function will return the 
+	   correct value */
+	virtual bool IsOpen(void) const { return m_Filed != -1; }
+
+	/* Open() associates this source with the descriptor Filed, setting it
+	   to non-blocking mode if IsUnixFd in true. Returns true on success,
+	   and false on error, setting errno to appropriately. 
+	   If you want to implement sources that can't be represented by UNIX 
+	   filedescriptors, you can use Filed to store any useful information 
+	   about the source.  
+	   This must be called by any derivations in an appropriate Method (like
+	   open for files, connect for sockets). */
+	virtual bool Open(int Filed, bool IsUnixFd = true);
+
+	/* Close() resets the source to the uninitialized state (IsOpen() == false)
+	   and must be called by any derivations after really closing the source.
+	   Returns true on success and false on error, setting errno appropriately.
+	   The object is in closed state afterwards, even if an error occured. */
+	virtual bool Close(void);
+
+	/* Read() reads at most Length bytes into the storage pointed to by Buffer,
+	   which must be at least Length bytes in size, using the SysRead()-
+	   Interface. It retries if an EINTR occurs (i.e. the low-level call was 
+	   interrupted). It returns the exact number of bytes read (which can be 
+	   fewer than requested). On error, -1 is returned, and errno is set 
+	   appropriately. */
+	ssize_t Read(void *Buffer, size_t Length);
+
+	/* Write() writes at most Length bytes from the storage pointed to by 
+	   Buffer, using the SysWrite()-Interface. It retries if EINTR occurs 
+	   (i.e. the low-level call was interrupted). It returns the exact number 
+	   of bytes written (which can be fewer than requested). On error, -1 is 
+	   returned and errno is set appropriately. */
+	ssize_t Write(const void *Buffer, size_t Length);
+
+	/* TimedWrite() tries to write Length bytes from the storage pointed to by
+	   Buffer within the time specified by TimeoutMs, using the Write()-
+	   Interface. On success, true is returned. On error, false is returned
+	   and errno is set appropriately. TimedRead only works on UNIX file 
+	   descriptor sources. */
+	bool TimedWrite(const void *Buffer, size_t Length, uint TimeoutMs);
+	
+	bool SafeWrite(const void *Buffer, size_t Length);
+
+	/* ReadUntil() tries to read at most Length bytes into the storage pointed
+	   to by Buffer, which must be at least Length bytes in size, within the
+	   time specified by TimeoutMs, using the Read()-Interface. Reading stops 
+	   after the character sequence Seq has been read and on end-of-file. 
+	   Returns the number of bytes read (if that is equal to Length, you have
+	   to check if the buffer ends with Seq), or -1 on error, in which case
+	   errno is set appropriately. */
+	ssize_t ReadUntil(void *Buffer, size_t Length, const char *Seq, 
+			uint TimeoutMs);
+
+	/* BytesRead() returns the exact number of bytes read through the Read()
+	   method since Close() has been called on this source (or since its 
+	   creation). */
+	size_t BytesRead(void) const { return m_BytesRead; }
+
+	/* BytesWritten() returns the exact number of bytes written through the 
+	   Write() method since Close() has been called on this source (or since 
+	   its creation). */
+	size_t BytesWritten(void) const { return m_BytesWritten; }
+
+	/* operator int() returns the descriptor (or informative number) associated
+	   with this source. */
+	operator int() const { return m_Filed; }
+};
+
+#endif // TOOLBOX_SOURCE_H
diff --git a/tools/tools.c b/tools/tools.c
new file mode 100644
index 0000000..fa813fa
--- /dev/null
+++ b/tools/tools.c
@@ -0,0 +1,12 @@
+#include "tools/tools.h"
+
+#include <sys/time.h>
+#include <time.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdarg.h>
+
+void *operator new(size_t nSize, void *p) throw () {
+	return p;
+}
+
diff --git a/tools/tools.h b/tools/tools.h
new file mode 100644
index 0000000..ab00c60
--- /dev/null
+++ b/tools/tools.h
@@ -0,0 +1,67 @@
+#ifndef TOOLBOX_TOOLS_H
+#define TOOLBOX_TOOLS_H
+
+//#include <stdio.h>
+//#include <iostream>
+#include <sys/types.h>
+
+//#define KILOBYTE(x) ((x)*1024)
+//#define MEGABYTE(x) (KILOBYTE(x)*1024)
+
+//typedef unsigned int  uint;
+//typedef unsigned long ulong;
+typedef unsigned char uchar;
+//typedef unsigned short ushort;
+
+// Special constructor for CreateElements
+void *operator new(size_t, void*) throw ();
+
+#ifdef TOOLBOX_DEBUG
+#	define ASSERT(x) if ((x)) cerr << "Warning: ASSERT failed At " << __FILE__ << ":" << __LINE__ << " ["#x"]" << endl
+#	define CHECK_PTR(x) if (!(x)) cerr << "Warning: Pointer is NULL At " << __FILE__ << ":" << __LINE__ << endl;
+#	define CHECK_NEXT_ALLOC() _checkNextAlloc()
+#	define DPRINT(x...) LOGi(x)
+#else
+#	define ASSERT(x)
+#	define CHECK_PTR(x)
+#	define CHECK_NEXT_ALLOC()
+#	define DPRINT(x...)
+#endif
+
+#define ERRNUL(e) {errno=e;return 0;}
+#define ERRSYS(e) {errno=e;return -1;}
+
+/* RETURNS() and RETURN() are macros that can be used if a class object is
+   being returned. They make use of the GNU C-Compiler's named return value
+   feature, if available. In this case, the class object isn't returned and 
+   copied, but the result itself is filled. 
+
+   RETURNS(ReturnType, FunctionDeclaration, Result)
+     ... function-body working on Result ...
+   RETURN(Result)
+   
+   A function like this (cXYZ is a class type):
+   
+   cXYZ myfunction(int a, char *b) {
+     cXYZ result;
+     ... something happens with result ...
+     return result;
+   }
+
+   can be written like this:
+
+   RETURNS(cXYZ, myfunction(int a, char *b), result)
+     ... something happens with result ...
+   RETURN(result)
+
+	 DISABLED SINCE GCC 3.x
+*/
+//#ifdef __GNUC__
+//#	define RETURNS(t,x,r) t x return r {
+//#	define RETURN(x) }
+//#else
+#	define RETURNS(t,x,r) t x { t r;
+#	define RETURN(x) return x; }
+//#endif
+
+#endif // TOOLBOX_TOOLS_H