//
// Debugger.cpp
//
// $Id: //poco/1.4/Foundation/src/Debugger.cpp#3 $
//
// Library: Foundation
// Package: Core
// Module:  Debugger
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/Debugger.h"
#include <sstream>
#include <cstdlib>
#include <cstdio>
#if defined(POCO_OS_FAMILY_WINDOWS)
	#include "Poco/UnWindows.h"
#elif defined(POCO_OS_FAMILY_UNIX) && !defined(POCO_VXWORKS)
	#include <unistd.h>
	#include <signal.h>
#elif defined(POCO_OS_FAMILY_VMS)
	#include <lib$routines.h>
	#include <ssdef.h>
#endif
#if defined(POCO_WIN32_UTF8) && !defined(POCO_NO_WSTRING)
#include "Poco/UnicodeConverter.h"
#endif


// NOTE: In this module, we use the C library functions (fputs) for,
// output since, at the time we're called, the C++ iostream objects std::cout, etc.
// might not have been initialized yet.


namespace Poco {


bool Debugger::isAvailable()
{
#if defined(_DEBUG)
	#if defined(POCO_OS_FAMILY_WINDOWS)
		#if defined(_WIN32_WCE)
			#if (_WIN32_WCE >= 0x600)
			    BOOL isDebuggerPresent;
			    if (CheckRemoteDebuggerPresent(GetCurrentProcess(), &isDebuggerPresent))
			    {
					return isDebuggerPresent ? true : false;
				}
				return false;
			#else
				return false;
			#endif
		#else
			return IsDebuggerPresent() ? true : false;
		#endif
	#elif defined(POCO_VXWORKS)
		return false;
	#elif defined(POCO_OS_FAMILY_UNIX)
		return std::getenv("POCO_ENABLE_DEBUGGER") ? true : false;
	#elif defined(POCO_OS_FAMILY_VMS)
		return true;
	#endif
#else
	return false;
#endif
}


void Debugger::message(const std::string& msg)
{
#if defined(_DEBUG)
	std::fputs("\n%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n", stderr);
	std::fputs(msg.c_str(), stderr);
	std::fputs("\n%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n", stderr);
	#if defined(POCO_OS_FAMILY_WINDOWS)
	if (isAvailable())
	{
#if defined(POCO_WIN32_UTF8) && !defined(POCO_NO_WSTRING)
		std::wstring umsg;
		UnicodeConverter::toUTF16(msg, umsg);
		umsg += '\n';
		OutputDebugStringW(umsg.c_str());
#else
		OutputDebugStringA(msg.c_str());
		OutputDebugStringA("\n");
#endif
	}
	#elif defined(POCO_OS_FAMILY_UNIX)
	#elif defined(POCO_OS_FAMILY_VMS)
	#endif
#endif
}


void Debugger::message(const std::string& msg, const char* file, int line)
{
#if defined(_DEBUG)
	std::ostringstream str;
	str << msg << " [in file \"" << file << "\", line " << line << "]";
	message(str.str());
#endif
}


void Debugger::enter()
{
#if defined(_DEBUG)
	#if defined(POCO_OS_FAMILY_WINDOWS)
	if (isAvailable())
	{
		DebugBreak();
	}
	#elif defined(POCO_VXWORKS)
	{
		// not supported
	}
	#elif defined(POCO_OS_FAMILY_UNIX)
	if (isAvailable())
	{
		kill(getpid(), SIGINT);
	}
	#elif defined(POCO_OS_FAMILY_VMS)
	{
		const char* cmd = "\012SHOW CALLS";
		lib$signal(SS$_DEBUG, 1, cmd);
	}
	#endif
#endif
}


void Debugger::enter(const std::string& msg)
{
#if defined(_DEBUG)
	message(msg);
	enter();
#endif
}


void Debugger::enter(const std::string& msg, const char* file, int line)
{
#if defined(_DEBUG)
	message(msg, file, line);
	enter();
#endif
}


void Debugger::enter(const char* file, int line)
{
#if defined(_DEBUG)
	message("BREAK", file, line);
	enter();
#endif
}


} // namespace Poco
