From: Park Heesob <phasis@...>
Date: 2005-10-18T22:49:55+09:00
Subject: Re: Win32API and GetFileVersionInfo

Hi,
----- Original Message ----- 
From: <jim.peak@gmail.com>
Newsgroups: comp.lang.ruby
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Tuesday, October 18, 2005 9:26 PM
Subject: Win32API and GetFileVersionInfo


>
> Hi all,
>
> I searched the whole web in order to find answers to my questions
> without much success.
>
> I'm writing a script that extract the version of executable files.  I
> use the Win32API and the following functions:
>
> GetFileVersionInfoSize
> GetFileVersionInfo
> VerQueryValue
>
> in this order.  For GetFileVersionInfoSize and GettFileVersionInfo,
> everything is working fine.  But I'm totally lost at using
> VerQueryValue.
>
> Here's what I'm doing:
>
> apiGetInfoFromVersion = Win32API.new("version", "VerQueryValue",
> ['p','p','p','p'], 'v')
> msgp = DL.malloc(DL.sizeof('P'))
> infoBufferLength = DL.malloc(DL.sizeof('P'))
> apiGetInfoFromVersion.call(infoVersion, "\\", msgp, infoBufferLength)
>
>
> where infoVersion is the result of a previous call to
> GetFileVersionInfo.
>
> How do I retrieve the information in msgp? I've tried many ways,
> without any success.
You can use memcpy.

> Thank you in advance.
>
>

Here is my version without dl

require 'Win32API'

VS_FIXEDFILEINFO = Struct.new("VS_FIXEDFILEINFO",
 :Signature,
 :StrucVersion,
 :FileVersionMS,
 :FileVersionLS,
 :ProductVersionMS,
 :ProductVersionLS,
 :FileFlagsMask,
 :FileFlags,
 :FileOS,
 :FileType,
 :FileSubtype,
 :FileDateMS,
 :FileDateLS)

file = "c:\\work\\xxx.dll"

apiGetFileVersionInfo = Win32API.new("version", 
"GetFileVersionInfo",['P','L','L','P'], 'L')
apiGetFileVersionInfoSize = Win32API.new("version", 
"GetFileVersionInfoSize",['P','P'], 'L')
apiGetInfoFromVersion = Win32API.new("version", 
"VerQueryValue",['P','P','P','P'], 'L')
memcpy = Win32API.new('msvcrt','memcpy','PPL','P')

size = apiGetFileVersionInfoSize.call(file,nil)
infoVersion = "\0" * size
apiGetFileVersionInfo.call(file,0,size,infoVersion)
lplpBuffer = "\0" * 4
pLen = "\0" * 4
apiGetInfoFromVersion.call(infoVersion,"\\",lplpBuffer,pLen)
lpBuffer = lplpBuffer.unpack("L")[0]
bufSize =  pLen.unpack("L*")[0]
rbuf = "\0" * bufSize
memcpy.call(rbuf,lpBuffer,bufSize)
vs_fixedfileinfo = VS_FIXEDFILEINFO.new(*rbuf.unpack("L*"))


HTH,

Park Heesob