path.cpp

很好用的网络封装库,不熟悉网络编程的人也可以使用。使用风格良好的标准c++编写。

//
// Path.cpp
//
// $Id: //poco/1.3/Foundation/src/Path.cpp#4 $
//
// Library: Foundation
// Package: Filesystem
// Module:  Path
//
// 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/Path.h"
#include "Poco/File.h"
#include "Poco/Exception.h"
#include "Poco/StringTokenizer.h"
#if defined(_WIN32) && defined(POCO_WIN32_UTF8)
#include "Poco/UnicodeConverter.h"
#include "Poco/Buffer.h"
#endif
#include <algorithm>


#if defined(POCO_OS_FAMILY_VMS)
#include "Path_VMS.cpp"
#elif defined(POCO_OS_FAMILY_UNIX)
#include "Path_UNIX.cpp"
#elif defined(POCO_OS_FAMILY_WINDOWS) && defined(POCO_WIN32_UTF8)
#include "Path_WIN32U.cpp"
#elif defined(POCO_OS_FAMILY_WINDOWS)
#include "Path_WIN32.cpp"
#endif


namespace Poco {


Path::Path(): _absolute(false)
{
}


Path::Path(bool absolute): _absolute(absolute)
{
}


Path::Path(const std::string& path)
{
	assign(path);
}


Path::Path(const std::string& path, Style style)
{
	assign(path, style);
}


Path::Path(const char* path)
{
	poco_check_ptr(path);
	assign(path);
}


Path::Path(const char* path, Style style)
{
	poco_check_ptr(path);
	assign(path, style);
}


Path::Path(const Path& path): 
	_node(path._node), 
	_device(path._device),
	_name(path._name),
	_version(path._version),
	_dirs(path._dirs),
	_absolute(path._absolute)
{	
}


Path::Path(const Path& parent, const std::string& fileName):
	_node(parent._node), 
	_device(parent._device),
	_name(parent._name),
	_version(parent._version),
	_dirs(parent._dirs),
	_absolute(parent._absolute)
{	
	makeDirectory();
	_name = fileName;
}


Path::Path(const Path& parent, const char* fileName):
	_node(parent._node), 
	_device(parent._device),
	_name(parent._name),
	_version(parent._version),
	_dirs(parent._dirs),
	_absolute(parent._absolute)
{	
	makeDirectory();
	_name = fileName;
}


Path::Path(const Path& parent, const Path& relative):
	_node(parent._node), 
	_device(parent._device),
	_name(parent._name),
	_version(parent._version),
	_dirs(parent._dirs),
	_absolute(parent._absolute)
{	
	resolve(relative);
}


Path::~Path()
{
}

	
Path& Path::operator = (const Path& path)
{
	return assign(path);
}

	
Path& Path::operator = (const std::string& path)
{
	return assign(path);
}


Path& Path::operator = (const char* path)
{
	poco_check_ptr(path);
	return assign(path);
}


void Path::swap(Path& path)
{
	std::swap(_node, path._node);
	std::swap(_device, path._device);
	std::swap(_name, path._name);
	std::swap(_version, path._version);
	std::swap(_dirs, path._dirs);
	std::swap(_absolute, path._absolute);
}


Path& Path::assign(const Path& path)
{
	if (&path != this)
	{
		_node     = path._node;
		_device   = path._device;
		_name     = path._name;
		_version  = path._version;
		_dirs     = path._dirs;
		_absolute = path._absolute;
	}
	return *this;
}


Path& Path::assign(const std::string& path)
{
#if defined(POCO_OS_FAMILY_VMS)
	parseVMS(path);
#elif defined(POCO_OS_FAMILY_WINDOWS)
	parseWindows(path);
#else
	parseUnix(path);
#endif
	return *this;
}

	
Path& Path::assign(const std::string& path, Style style)
{
	switch (style)
	{
	case PATH_UNIX:
		parseUnix(path);
		break;
	case PATH_WINDOWS:
		parseWindows(path);
		break;
	case PATH_VMS:
		parseVMS(path);
		break;
	case PATH_NATIVE:
		assign(path);
		break;
	case PATH_GUESS:
		parseGuess(path);
		break;
	default:
		poco_bugcheck();
	}
	return *this;
}


Path& Path::assign(const char* path)
{
	return assign(std::string(path));
}


std::string Path::toString() const
{
#if defined(POCO_OS_FAMILY_UNIX)
	return buildUnix();
#elif defined(POCO_OS_FAMILY_WINDOWS)
	return buildWindows();
#else
	return buildVMS();
#endif
}

	
std::string Path::toString(Style style) const
{
	switch (style)
	{
	case PATH_UNIX:
		return buildUnix();
	case PATH_WINDOWS:
		return buildWindows();
	case PATH_VMS:
		return buildVMS();
	case PATH_NATIVE:
	case PATH_GUESS:
		return toString();
	default:
		poco_bugcheck();
	}
	return std::string();
}


bool Path::tryParse(const std::string& path)
{
	try
	{
		Path p;
		p.parse(path);
		assign(p);
		return true;
	}
	catch (...)
	{
		return false;
	}
}


bool Path::tryParse(const std::string& path, Style style)
{
	try
	{
		Path p;
		p.parse(path, style);
		assign(p);
		return true;
	}
	catch (...)
	{
		return false;
	}
}


Path& Path::parseDirectory(const std::string& path)
{
	assign(path);
	return makeDirectory();
}


Path& Path::parseDirectory(const std::string& path, Style style)
{
	assign(path, style);
	return makeDirectory();
}


Path& Path::makeDirectory()
{
#if defined(POCO_OS_FAMILY_VMS)
	pushDirectory(getBaseName());
#else
	pushDirectory(_name);
#endif
	_name.clear();
	_version.clear();
	return *this;
}


Path& Path::makeFile()
{
	if (!_dirs.empty() && _name.empty())
	{
		_name = _dirs.back();
		_dirs.pop_back();
#if defined(POCO_OS_FAMILY_VMS)
		setExtension("DIR");
#endif
	}
	return *this;
}


Path& Path::makeAbsolute()
{
	return makeAbsolute(current());
}


Path& Path::makeAbsolute(const Path& base)
{
	if (!_absolute)
	{
		Path tmp = base;
		tmp.makeDirectory();
		for (StringVec::const_iterator it = _dirs.begin(); it != _dirs.end(); ++it)
		{
			tmp.pushDirectory(*it);
		}
		_node     = tmp._node;
		_device   = tmp._device;
		_dirs     = tmp._dirs;
		_absolute = base._absolute;
	}
	return *this;
}


Path Path::absolute() const
{
	Path result(*this);
	if (!result._absolute)
	{
		result.makeAbsolute();
	}
	return result;
}


Path Path::absolute(const Path& base) const
{
	Path result(*this);
	if (!result._absolute)
	{
		result.makeAbsolute(base);
	}
	return result;
}


Path Path::parent() const
{
	Path p(*this);
	return p.makeParent();
}


Path& Path::makeParent()
{
	if (_name.empty())
	{
		if (_dirs.empty())
		{
			if (!_absolute)
				_dirs.push_back("..");
		}
		else
		{
			if (_dirs.back() == "..")
				_dirs.push_back("..");
			else
				_dirs.pop_back();
		}
	}
	else
	{
		_name.clear();
		_version.clear();
	}
	return *this;
}


Path& Path::append(const Path& path)
{
	makeDirectory();
	_dirs.insert(_dirs.end(), path._dirs.begin(), path._dirs.end());
	_name = path._name;
	_version = path._version;
	return *this;
}


Path& Path::resolve(const Path& path)
{
	if (path.isAbsolute())
	{
		assign(path);
	}
	else
	{
		for (int i = 0; i < path.depth(); ++i)
			pushDirectory(path[i]);
		_name = path._name;
	}
	return *this;
}


void Path::setNode(const std::string& node)
{
	_node     = node;
	_absolute = _absolute || !node.empty();
}

	
void Path::setDevice(const std::string& device)
{
	_device   = device;
	_absolute = _absolute || !device.empty();
}

	
const std::string& Path::directory(int n) const
{
	poco_assert (0 <= n && n <= _dirs.size());
	
	if (n < _dirs.size())
		return _dirs[n];
	else
		return _name;	
}


const std::string& Path::operator [] (int n) const
{
	poco_assert (0 <= n && n <= _dirs.size());
	
	if (n < _dirs.size())
		return _dirs[n];
	else
		return _name;	
}

	
void Path::pushDirectory(const std::string& dir)
{
	if (!dir.empty() && dir != ".")
	{
#if defined(POCO_OS_FAMILY_VMS)
		if (dir == ".." || dir == "-")
		{
			if (!_dirs.empty() && _dirs.back() != ".." && _dirs.back() != "-")
				_dirs.pop_back();
			else if (!_absolute)
				_dirs.push_back(dir);
		}
		else _dirs.push_back(dir);
#else
		if (dir == "..")
		{
			if (!_dirs.empty() && _dirs.back() != "..")
				_dirs.pop_back();
			else if (!_absolute)
				_dirs.push_back(dir);
		}
		else _dirs.push_back(dir);
#endif
	}
}