C++博客-XCPP

Creating a bootable clean VHD

xcpp — Mon, 16 May 2011 09:56:00 GMT

1. Create VHD from Hyper-V manager or Disk Management in Server Manager
2. Attach the VHD, initialize with MBR, create volume (format with NTFS and mount to X:\), set active
3. Launch EasyBCD, in "Bootloader Setup" tab, choose correct Partition, and install BCD (a.k.a. PBR, Partition Boot Record)
4. At this stage the newly installed BCD is still empty. Now click "Add New Entry" in EasyBCD with default settings to add a default entry
5. Deploy a OS into the VHD: imagex /apply X:\
6. Detach the VHD

Now the VHD is a sysprep'ed, bootable, and absolutely clean VHD.

xcpp 2011-05-16 17:56 发表评论

NTFS directory junctions to network shared folder

xcpp — Sun, 08 May 2011 06:56:00 GMT

Usually it is believed that NTFS directory junctions are not allowed to link network shared folders.

Refer to this MSDN article: http://msdn.microsoft.com/en-us/library/aa365006%28v=VS.85%29.aspx

However here is a easy workaround:

1. Create a symbolic link to the network shared folder
2. Create directory junction to the symbolic link
3. Done.

The link created in step 2 looks like a directory junction, but behaves like a symbolic link.

xcpp 2011-05-08 14:56 发表评论

Expand VirtualBox VDI - Linux guest/Windows host

xcpp — Thu, 07 Jan 2010 03:31:00 GMT

1. Download clonezilla and gparted live CD
2. Create a new VDI with bigger size, attach it to the VM, boot the VM with clonezilla live CD
3. Clone the old VDI to new VDI
4. Detach old VDI (don't delete it before new VDI is verified to work)
6. Boot the VM with gparted live CD, delete swap and extended partition, expand the primary partition, and then recreate the extended and swap partition
7. Remove CD and boot the VM, verify if it works
8. Delete old VDI

BTW, for Virtual Box shared folders:

sudo mount -t vboxsf share_name /path/to/mount

To mount it permanently, append a line to /etc/init.d/rc.local with above command.

xcpp 2010-01-07 11:31 发表评论

Build wxWidgets applications with CodeLite in Ubuntu

xcpp — Wed, 06 Jan 2010 14:45:00 GMT

Today I spent 5+ hours in this problem so I think it is worth to write down my experience here...

I just started to play with Linux and the open source C++ IDE CodeLite. The IDE and wxWidgets library looks great, and the Linux platform is becoming more and more user friendly today. So I tried to build an application with CodeLite (2.1.3584) in Ubuntu (9.10).

I tried to build a wxWidgets application in Windows before. According to this article the thing is quite easy. However, I didn't expect it is so difficult to do the same thing in Linux (simply because I can't find a similar article on Internet). I googled again and again but didn't find much stuff useful.

Here is instructions I used:

1. Install wxWidgets package: sudo apt-get install libwxgtk2.8-dev

2. Install build essentials package: sudo apt-get install build-essential

3. Create a link for "/usr/include/wx-2.8/wx" to "/usr/include/wx", or copy the directory over

4. Create a link for "/usr/lib/wx/include/gtk2-unicode-release-2.8/wx/setup.h" to "/usr/include/wx/setup.h", or copy the file over

5. Open CodeLite IDE, create a project using wxWidgets template

6. Modify the default project settings to:
complier options: -g;$(shell wx-config --cxxflags)
linker options: -mwindows;$(shell wx-config --libs)

7. Complie and run

Without step 6 you may see following errors:

No config found to match: /usr/bin/wx-config --cxxflags --unicode=yes --debug=yes in /usr/lib/wx/config

No Target! You should use wx-config program for compilation flags!

It's because there is no debug library exists in /usr/lib/wx/config. By default there is only release+unicode builds.

update on 2010/1/9:

It is actually so easy. I didn't do it in a right way. Now I believe the right process should be following the instructions here.

For a simplified guild:

1. sudo apt-get install build-essential
2. sudo apt-get install libwxgtk2.8-dev libwxgtk2.8-dbg
3. sudo ln -sv /usr/include/wx-2.8/wx /usr/include/wx
4. Create a wx project in CodeLite, build and run with default settings. It should just works

xcpp 2010-01-06 22:45 发表评论

VC++ 2008 Express, Win7 SDK, and 64bit targets

xcpp — Wed, 09 Sep 2009 02:54:00 GMT

In several months ago I posted a patch for VC++ 2008 Express to enable its x64 and IA64 targets (by default this free edition of VC++ only supports x86 targets). It used to work with Windows SDK for Windows Server 2008 and .NET Framework 3.5 nicely, but now as Windows SDK for Windows 7 and .NET Framework 3.5 SP1 has been released, it cannot work sometimes, so I decide to update this patch for the new SDK.

I have to mention that Microsoft introduces 2 new bugs in Win7 SDK:

1. If you are running a x86 machine, the x86 version of Win7 SDK will not install x64 and IA64 tools anyway, even if you have selected all checkboxes during the setup.

Workaround: repair the installed Win7 SDK (from control panel), and check all these checkboxes again, then you get all x64 and IA64 tools back. (note: don't try to install x64 SDK to a x86 machine, setup program will fail)

2. After the Win7 SDK (x86/x64/IA64 all versions) is installed, the Windows SDK Configuration Tool will not register the latest v7.0 SDK as system default (instead it still uses v6.0A). As a result VC++ will not be able to locate x64 and IA64 tools (compliers etc).

Workaround: launch the Windows SDK Configuration Tool from start menu, choose the right version (v7.0), and click "Make Current".

Now you can download and install the new patch here. I have tested it on clean x86 and x64 machines.

I removed the two DLLs from x64 package (VCProjectAMD64Platform.dll and VCProjectIA64Platform.dll), because Win7 SDK will copy correct ones (Microsoft has fixed this bug in Win7 SDK).

xcpp 2009-09-09 10:54 发表评论

Entity Framework Query Samples for PostgreSQL

xcpp — Tue, 08 Sep 2009 03:56:00 GMT

As a PostgreSQL fans as well as a .NET user, I used PostgreSQL in a couple of .NET projects and it works great. Now LINQ and Entity Framework (EF) become more and more popular so it is natural that I want to adopt these technologies into projects too. At first I tried DB LINQ, but obviously it is not ready to use (descried in my previous post). So I quickly switched to entity framework.

Microsoft designed EF to support not only its SQL Server. It announced a lot of supported (with supported drivers) 3rd party databases listed here. Luckily my favourite PostgreSQL is present (Npgsql).

Microsoft also released a lot of great samples for EF, and I started to learn EF from this one: http://code.msdn.microsoft.com/EFQuerySamples (it looks fancy and rich). Then I ported the sample database NorthwindEF to PostgreSQL to test if EF for PostgreSQL really works. The initial test shows it works graet: almost all samples can run with PostgreSQL smoothly. The translated SQL queries also looks good.

I uploaded the ported EF sample for PostgreSQL here (AFAIK there is no official documents on Internet for EF support of PostgreSQL/Npgsql, so this sample can be a good start).

xcpp 2009-09-08 11:56 发表评论

PostgreSQL和DbLINQ

xcpp — Fri, 04 Sep 2009 08:34:00 GMT

PostgreSQL和DbLINQ：

PostgreSQL的名字也可以叫做Postgres，简写可以为PG
PG是一个功能全面的开源数据库（比那个连ACID都没有的MySQL强多了），性能也很不错，我把SQL Server 2008里面的8GB数据导入到PG里面后，发现查询性能和数据插入性能都差不多，但是SQL Server好像还是要快一点点（非常不严谨的测试，我这不超过10%，企业版）
PG的backup文件真是超级的省空间，SQL Server导出的bak文件有7G多，而PG导出的只有几百兆（这个数据库里面重复数据多有关系），PG在备份的时候应该是自动压缩了
PG的pgAdminIII虽然界面不是那么好看，但是很好用，能用SQL脚本干的事情它基本上都能干
PG在Windows上面也支持SSPI集成认证方式，这和SQL Server默认的认证方式是一样的，可以很大的提升安全性（不用明文密码了），但是我没能配成功..
在PG里面unicode就是utf-8，这样英文占一个字节，中文占三个字节，不如ucs-2。当然ucs-2只能支持2^16个字符，不是真正的unicode。真正的unicode最好用ucs-4，可是这个字长又太大了。由于PG内部不用ucs-2，所以和windows程序的匹配不是那么理想（NT的unicode就是ucs-2），要么干脆都用DBCS。但是.net里面又只有unicode的string... 所以还是C++好
DbLINQ虽然已经开发了两年多了，但现在基本上还是没法用，简单的单表查询还行，query稍微复杂一点点就不行了，group by都时常出问题，完全没法用在实际的项目中（哪怕是纯娱乐的项目）
DbLINQ现在可下载的是0.18版本（一年前的），从SVN拖下来的是0.19，bug多多，比如PG里面表的主键必须命名为xxx_pkey的形式，不然就认不到。外键则只支持单列的外键，多列的话不能直接生成C#，只能生成一个错误的DBML，然后在VS里面修改DBML之后再生成C#，这样才能用。为这些bug真是浪费了好多时间（重建主键就花了几个小时）
DbLINQ的很多example里面都是一堆注释，看也看不懂，基本上没啥用处

总而言之，我对PostgreSQL这个数据库印象相当不错，而对DbLINQ比较失望。看来要在PG上面用LINQ，还是直接上ADO.NET Entity Framework比较好。

xcpp 2009-09-04 16:34 发表评论

Boost 1.39的编译经历

xcpp — Wed, 08 Jul 2009 13:51:00 GMT

摘要: 最近写个东西要用到正则表达式，于是就想到了Boost库，由于以前没有用过这个库，所以今天为这事儿真是费了一番功夫。

一开始想到的是Boost，但是突然想起VC++ 2008的SP1不是已经带了tr1的实现吗，貌似直接用就行了。但是事与愿违，我这里装的是VC++ 2008 Express，虽然也能#include ，但是写出来的程序只能编译不能链接。后来一查才知道微软的tr1实现是不支持Express的（虽然不支持却又把头文件放在那里诓人），莫非又要去别个VC完整版那里拷点东西出来不成？这应该是没必要的，因为从VC++ 2003开始Boost就可以很好的在VC下编译了，所以干脆不管那个啥tr1了，准备直接从Boost官方网站下载Boost再自己编译。阅读全文

xcpp 2009-07-08 21:51 发表评论

VC++ 2008 Express和ATL、MFC、WTL编程

xcpp — Fri, 24 Apr 2009 06:45:00 GMT

VC++ Express精简掉了对于ATL和MFC的支持，不过我发现只要从完整安装版（VSTS等）把C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc 这个目录拷贝过来就直接可以用了，整个文件包是147M，用7z可以压缩到14M。

复制好这个目录后，就可以开始配置WTL8.0了：

1、解压缩WTL8的安装包
2、复制setup80x.js到setup90x.js
3、用记事本打开setup90x.js，替换所有字符串8.0为9.0并保存文件
4、运行setup90x.js
5、在VC++ Express里面配置WTL的include目录

visualfc博客里给出的方案是安装PSDK2003，这个SDK带的ATL和MFC版本分别是3.0和4.2的，不是最新的版本，不太爽。当然，从完整版的安装目录里面拷贝出东西来给Express版本用，这样做可能还是有点盗版嫌疑。

xcpp 2009-04-24 14:45 发表评论

VC++ 2008 Express和64位编程

xcpp — Fri, 24 Apr 2009 06:18:00 GMT

Visual Studio的Express系列虽然在功能上肯定比不上完整的Team Suite版本，但是它是免费的，而且“该有的都有了”，所以它正在变得越来越流行。对于VC++ Express，它的不方便之处之一是不支持64位编程，而这个限制在安装Windows SDK后，在默认的设置依然存在。有个叫作Jens的人搜集了各个论坛上程序员们分享的各种方案，现在似乎终于看到了曙光，按照他写在上面blog里面的方法，可以让VC++ Express完美的支持64位编程，包括AMD64和IA64。

于是我写了一些脚本让这种patch方法能够自动化的执行。/Files/xcpp/XVCE.zip

这个脚本可以支持32位和64位的Windows。我只在Win6和Win7上面测试过这些脚本，在我用的几台电脑上全都完美运行，我以前写的几个64位程序项目文件都能顺利的打开、编译和运行。当然IA64的程序虽然能编译但是我没地方去运行它们（需要Intel的安腾处理器），所以不完全保证能用，但是应该能用。

下面是readme.txt：

1. Install Visual C++ 2008 Express (to default folder in C drive, or this patch will not work)
2. Install Windows SDK (Microsoft Windows SDK for Windows Server 2008 and .NET Framework 3.5)
3. Open a command prompt, navigate to the folder contains this file, run setup_x86.bat or setup_x64.bat according to your system architecture
4. If there is no error in the command prompt, launch the Visual C++ 2008 Express IDE and build your X64 or IA64 projects

This work is based on the work by jenshuebel: http://jenshuebel.wordpress.com/2009/02/12/visual-c-2008-express-edition-and-64-bit-targets/

Thanks jenshuebel for the complete and accurate instructions, and thanks Microsoft for the free Visual C++ IDE.

xcpp 2009-04-24 14:18 发表评论