blocks|key|1524196|text|看看Win32API+stdlib。它是Windows32API或DLL的一个相当简单(但神秘)的接口。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1524197|Documentation+is+here，一些examples+here。为了让你尝一尝：|1524198|require+"Win32API"++++
def+get_computer_name
++name+=+"+"+*+128
++size+=+"128"
++Win32API.new('kernel32',+'GetComputerName',+['P',+'P'],+'I').call(name,+size)++
++name.unpack("A*")++
end+|code-block|syntax|javascript|1524199|entityMap|0|LINK|mutability|MUTABLE|url|http://www.rubycentral.com/pickaxe/lib_windows.html#Win32API.new|1|http://www.ruby-doc.org/stdlib/libdoc/Win32API/rdoc/index.html|2|http://www.rubytips.org/2008/05/13/accessing-windows-api-from-ruby-using-win32api-library/^0|2|8|2|8|0|0|0|L|1|O|D|2|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@$9|11|A|12|1|13]]|E|$]]|$1|F|3|G|5|6|7|14|8|@]|D|@$9|15|A|16|1|17]|$9|18|A|19|1|1A]]|E|$]]|$1|H|3|I|5|J|7|1B|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]|U|$5|P|Q|R|E|$S|V]]|W|$5|P|Q|R|E|$S|X]]]]

Have a look at <a href="http://www.rubycentral.com/pickaxe/lib_windows.html#Win32API.new" rel="noreferrer"><code>Win32API</code></a> stdlib. It's a fairly easy (but arcane) interface to the Windows 32 API, or DLLs.

<a href="http://www.ruby-doc.org/stdlib/libdoc/Win32API/rdoc/index.html" rel="noreferrer">Documentation is here</a>, some <a href="http://www.rubytips.org/2008/05/13/accessing-windows-api-from-ruby-using-win32api-library/" rel="noreferrer">examples here</a>. To give you a taste:

<pre><code>require "Win32API" 
def get_computer_name
 name = " " * 128
 size = "128"
 Win32API.new('kernel32', 'GetComputerName', ['P', 'P'], 'I').call(name, size) 
 name.unpack("A*") 
end 
</code></pre>

blocks|key|1309177|text|我认为您也可以使用ruby/dl+http://groups.google.com/group/comp.lang.ruby/browse_thread/thread/95a483230caf3d39。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1309178|或者ffi让它变得更容易，对跨虚拟机更友好：|1309179|https://github.com/ffi/ffi/wiki/Windows-Examples|1309180|entityMap|0|LINK|mutability|MUTABLE|url|http://groups.google.com/group/comp.lang.ruby/browse_thread/thread/95a483230caf3d39|1^0|H|2B|0|0|0|0|1C|1|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|V|8|@]|9|@$A|W|B|X|1|Y]]|C|$]]|$1|H|3|-4|5|6|7|Z|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]|P|$5|K|L|M|C|$N|G]]]]

I think you can also use ruby/dl
<a href="http://groups.google.com/group/comp.lang.ruby/browse_thread/thread/95a483230caf3d39" rel="nofollow noreferrer">http://groups.google.com/group/comp.lang.ruby/browse_thread/thread/95a483230caf3d39</a>

or ffi makes it easier and more cross VM friendly:

<a href="https://github.com/ffi/ffi/wiki/Windows-Examples" rel="nofollow noreferrer">https://github.com/ffi/ffi/wiki/Windows-Examples</a>

blocks|key|1309229|text|你可以使用Fiddle：http://ruby-doc.org/stdlib-2.0.0/libdoc/fiddle/rdoc/Fiddle.html|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1309230|Fiddle是一个鲜为人知的模块，它是在1.9.x中添加到Ruby的标准库中的。它允许您从Ruby中直接与C库交互。|1309231|它通过包装libffi来工作，libffi是一个流行的C库，允许用一种语言编写的代码调用用另一种语言编写的方法。如果您没有听说过它，"ffi“代表”外部函数接口“。而且你不仅仅局限于C语言，一旦你学会了Fiddle，你就可以使用用Rust和其他支持它的语言编写的库。|1309232|http://blog.honeybadger.io/use-any-c-library-from-ruby-via-fiddle-the-ruby-standard-librarys-best-kept-secret/|1309233|require+'fiddle'

libm+=+Fiddle.dlopen('/lib/libm.so.6')

floor+=+Fiddle::Function.new(
++libm['floor'],
++[Fiddle::TYPE_DOUBLE],
++Fiddle::TYPE_DOUBLE
)

puts+floor.call(3.14159)+#=>+3.0|code-block|syntax|javascript|1309234|或|1309235|require+'fiddle'
require+'fiddle/import'

module+Logs
++extend+Fiddle::Importer
++dlload+'/usr/lib/libSystem.dylib'
++extern+'double+log(double)'
++extern+'double+log10(double)'
++extern+'double+log2(double)'
end

#+We+can+call+the+external+functions+as+if+they+were+ruby+methods!
puts+Logs.log(10)+++#+2.302585092994046
puts+Logs.log10(10)+#+1.0
puts+Logs.log2(10)++#+3.321928094887362|1309236|entityMap|0|LINK|mutability|MUTABLE|url|http://ruby-doc.org/stdlib-2.0.0/libdoc/fiddle/rdoc/Fiddle.html|1^0|C|1R|0|0|0|0|0|32|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@$A|12|B|13|1|14]]|C|$]]|$1|D|3|E|5|6|7|15|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|16|8|@]|9|@]|C|$]]|$1|H|3|I|5|6|7|17|8|@]|9|@$A|18|B|19|1|1A]]|C|$]]|$1|J|3|K|5|L|7|1B|8|@]|9|@]|C|$M|N]]|$1|O|3|P|5|6|7|1C|8|@]|9|@]|C|$]]|$1|Q|3|R|5|L|7|1D|8|@]|9|@]|C|$M|N]]|$1|S|3|-4|5|6|7|1E|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]|10|$5|V|W|X|C|$Y|I]]]]

You can use Fiddle: <a href="http://ruby-doc.org/stdlib-2.0.0/libdoc/fiddle/rdoc/Fiddle.html" rel="noreferrer">http://ruby-doc.org/stdlib-2.0.0/libdoc/fiddle/rdoc/Fiddle.html</a>

Fiddle is a little-known module that was added to Ruby's standard library in 1.9.x. It allow you to interact directly with C libraries from Ruby.

It works by wrapping libffi, a popular C library that allows code written in one language to call methods written in another. In case you haven't heard of it, "ffi" stands for "foreign function interface." And you're not just limited to C. Once you learn Fiddle, you can use libraries written in Rust and other languages that support it.

<a href="http://blog.honeybadger.io/use-any-c-library-from-ruby-via-fiddle-the-ruby-standard-librarys-best-kept-secret/" rel="noreferrer">http://blog.honeybadger.io/use-any-c-library-from-ruby-via-fiddle-the-ruby-standard-librarys-best-kept-secret/</a>

<pre><code>require 'fiddle'

libm = Fiddle.dlopen('/lib/libm.so.6')

floor = Fiddle::Function.new(
 libm['floor'],
 [Fiddle::TYPE_DOUBLE],
 Fiddle::TYPE_DOUBLE
)

puts floor.call(3.14159) #=&gt; 3.0
</code></pre>

or

<pre><code>require 'fiddle'
require 'fiddle/import'

module Logs
 extend Fiddle::Importer
 dlload '/usr/lib/libSystem.dylib'
 extern 'double log(double)'
 extern 'double log10(double)'
 extern 'double log2(double)'
end

# We can call the external functions as if they were ruby methods!
puts Logs.log(10) # 2.302585092994046
puts Logs.log10(10) # 1.0
puts Logs.log2(10) # 3.321928094887362
</code></pre>

blocks|key|1524347|text|有一个由Hiroshi+Hatake和Daniel+Berger开发的开源win32-api“替代Win32API的插件”。它适用于Ruby+1.8、1.9和2.X。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1524348|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/cosmo0920/win32-api^0|11|9|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

There is the open source <a href="https://github.com/cosmo0920/win32-api" rel="nofollow noreferrer">win32-api</a> "drop-in replacement for Win32API" by Hiroshi Hatake and Daniel Berger. It works with Ruby 1.8, 1.9, and 2.X.

I want to access functions within a DLL using Ruby. I want to use the low-level access of C while still retaining the simplicity of writing Ruby code. How do I accomplish this?

How do I call Windows DLL functions from Ruby?

虚拟机

我想使用Ruby访问DLL中的函数。我希望使用C的低级访问，同时仍然保留编写Ruby代码的简单性。我该如何做到这一点？

问如何从Ruby调用Windows DLL函数？
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