// ConsoleApplication2.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <windows.h>
#include <tchar.h>
#include <stdio.h>
#include <assert.h>

char* WideCharToMultiByte(LPCTSTR widestr)
{
	int num = WideCharToMultiByte(CP_OEMCP, NULL, widestr, -1, NULL, 0, NULL, FALSE);
	char *pchar = new char[num];
	WideCharToMultiByte(CP_OEMCP, NULL, widestr, -1, pchar, num, NULL, FALSE);
	return pchar;
}

bool IsDirectory(const LPTSTR & strPath)
{
	DWORD dwAttrib = GetFileAttributes(strPath);
	return static_cast<bool>((dwAttrib != 0xffffffff && (dwAttrib & FILE_ATTRIBUTE_DIRECTORY)));
}

int main()
{
	HANDLE hDir;
	BYTE* pBuffer = (LPBYTE)new CHAR[4096];
	DWORD dwBufferSize;
	LPTSTR lpPath = _T("D:\\var\\www\\");
	WCHAR szFileName[MAX_PATH];
	char* szFilePath;

	PFILE_NOTIFY_INFORMATION pNotify = (PFILE_NOTIFY_INFORMATION)pBuffer;

	hDir = CreateFile(lpPath, FILE_LIST_DIRECTORY,
		FILE_SHARE_READ |
		FILE_SHARE_WRITE |
		FILE_SHARE_DELETE, NULL,
		OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS |
		FILE_FLAG_OVERLAPPED, NULL);
	if (hDir == INVALID_HANDLE_VALUE)
	{
		printf("INVALID_HANDLE_VALUE");
		return 0;
	}

	while (TRUE)
	{
		if (ReadDirectoryChangesW(hDir,
			pBuffer,
			4096,
			TRUE,
			FILE_NOTIFY_CHANGE_FILE_NAME | FILE_NOTIFY_CHANGE_DIR_NAME | FILE_NOTIFY_CHANGE_LAST_WRITE,
			&dwBufferSize,
			NULL,
			NULL))
		{
			memset(szFileName, 0, MAX_PATH);
			memcpy(szFileName, lpPath, _tcslen(lpPath) * sizeof(WCHAR));
			memcpy(szFileName + _tcslen(lpPath), pNotify->FileName, pNotify->FileNameLength);
			szFilePath = WideCharToMultiByte(szFileName);

			switch (pNotify->Action)
			{
			case FILE_ACTION_ADDED:
				if (IsDirectory(szFileName))
				{
					printf("Directory %s added.\n", szFilePath);
				}
				else
				{
					printf("File %s added.\n", szFilePath);
				}
				break;
			case FILE_ACTION_REMOVED:
				if (IsDirectory(szFileName))
				{
					printf("Directory %s removed.\n", szFilePath);
				}
				else
				{
					printf("File %s removed.\n", szFilePath);
				}
				break;
			case FILE_ACTION_MODIFIED:
				if (!IsDirectory(szFileName))
				{
					printf("File %s modified.\n", szFilePath);
				}
				break;
			case FILE_ACTION_RENAMED_OLD_NAME:
				if (pNotify && pNotify->NextEntryOffset != 0UL)
				{
					PFILE_NOTIFY_INFORMATION pNext = (PFILE_NOTIFY_INFORMATION)((LPBYTE)pNotify + pNotify->NextEntryOffset);
					assert((DWORD)((BYTE*)pNext - pBuffer) < dwBufferSize);
					{
						WCHAR szFileName2[MAX_PATH];
						char* szFilePath2;
						memset(szFileName2, 0, MAX_PATH);
						memcpy(szFileName2, lpPath, _tcslen(lpPath) * sizeof(WCHAR));
						memcpy(szFileName2 + _tcslen(lpPath), pNext->FileName, pNext->FileNameLength);
						szFilePath2 = WideCharToMultiByte(szFileName2);
						if (IsDirectory(szFileName2))
						{
							printf("Directory name changed from %s to %s.\n", szFilePath, szFilePath2);
						}
						else
						{
							printf("File name changed from %s to %s.\n", szFilePath, szFilePath2);
						}
					}
				}
				break;
			case FILE_ACTION_RENAMED_NEW_NAME:
				printf("FILE_ACTION_RENAMED_NEW_NAME.\n");
				break;
			default:
				break;
			}
		}
	}
}