将静态 Windows 库转换为 dll

Convert static windows library to dll

提问by jb.

I have a library contains a bunch of static *libfiles, I wish to access them from JNA(a Java library that allows one to dynamically call `dll's from JAVA Code), so is there a way to magically change static lib to dll?

我有一个包含一堆静态*lib文件的库，我希望从JNA（一个允许从 JAVA 代码动态调用`dll 的 Java 库）访问它们，那么有没有办法神奇地将静态库更改为 dll？

Code was compiled using Visual studio (hope that is relevant), and I also have appropriate header files.

代码是使用 Visual Studio 编译的（希望是相关的），我也有适当的头文件。

I do not have access to source code, also I would like to do it using only free (as in beer) tools.

我无权访问源代码，我也想只使用免费（如啤酒）工具来完成。

采纳答案by jb.

I did as anon suggested, I did an automatic converter (someone suggested just putting _ddlspec(export) before declaration and compiling dll with this header would work -- well it didn't -- maybe i did something wrong -- I'm Plain Old Java Programmer ;)):

我按照 anon 的建议做了，我做了一个自动转换器（有人建议只在声明之前放置 _ddlspec(export) 并用这个头文件编译 dll 会起作用——好吧它没有——也许我做错了什么——我很简单老 Java 程序员 ;))：

it basically parses header files and turns:

它基本上解析头文件并转换：

  SADENTRY SadLoadedMidFiles( HMEM, USHORT usMaxMidFiles, VOID * );   

to:

到：

 __declspec(dllexport) SADENTRY DLL_WRAPPER_SadLoadedMidFiles(HMEM param0, 
            USHORT usMaxMidFiles, VOID* param2){
      return SadLoadedMidFiles(param0, usMaxMidFiles, param2);
  }

Here is the code (most probably its Regexp abuse, but it works), gui part depends on MigLayout:

这是代码（很可能是它的 Regexp 滥用，但它有效），gui 部分取决于 MigLayout：

    package cx.ath.jbzdak.diesIrae.util.wrappergen;

    import net.miginfocom.swing.MigLayout;

    import javax.swing.*;
    import static java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment;
    import java.awt.*;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.io.*;
    import java.nio.charset.Charset;
    import java.util.ArrayList;
    import java.util.Collections;
    import java.util.List;
    import java.util.regex.Matcher;
    import java.util.regex.Pattern;

    /**
     * Displays a window. In this window you have to specify two things:
     * <p/>
     * 1. Name of header file that you want to process.
     * <p/>
     * 2. Name of output files extension will be added automatically. We will override any existing files.
     *
     * <p/>
     * Dependencies: MigLayout
     * <p/>
     * Actual wrapper generation is done inside WrapperGen class.
     * <p/>
     * KNOWN ISSUES:
     * <p/>
     * 1. Ignores preprocessor so may extract finction names that are inside <code>#if false</code>.
     * <p/>
     * 2. Ignores comments
     * <p/>
     * 3. May fail to parse werid parameter syntax. . .
     *
     * Created by IntelliJ IDEA.
     * User: Jacek Bzdak 
     */
    public class WrapperGenerator {

        public static final Charset charset = Charset.forName("UTF-8");


        WrapperGen generator = new WrapperGen();

        // GUI CODE:

        File origHeader, targetHeader, targetCpp;

        JTextField newHeaderFileName;

        JFrame wrapperGeneratorFrame;
        {
            wrapperGeneratorFrame = new JFrame();
            wrapperGeneratorFrame.setTitle("Zamknij mnie!"); //Wrapper generator
            wrapperGeneratorFrame.setLayout( new MigLayout("wrap 2, fillx", "[fill,min!]"));
            wrapperGeneratorFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            ActionListener buttonListener = new ActionListener() {
                JFileChooser fileChooser = new JFileChooser();
                {
                    fileChooser.setFileFilter(new javax.swing.filechooser.FileFilter() {
                        @Override
                        public boolean accept(File f) {
                            return f.isDirectory() || f.getName().matches(".*\.h(?:pp)?");
                        }
                        @Override
                        public String getDescription() {
                            return "Header files";
                        }
                    });
                    fileChooser.setCurrentDirectory(new File("C:\Documents and Settings\jb\My Documents\Visual Studio 2008\Projects\dll\dll"));
                }
                public void actionPerformed(ActionEvent e) {
                    if(JFileChooser.APPROVE_OPTION == fileChooser.showOpenDialog(wrapperGeneratorFrame)){
                        origHeader = fileChooser.getSelectedFile();
                    }
                }
            };
            wrapperGeneratorFrame.add(new JLabel("Original header file"));
            JButton jButton = new JButton("Select header file");
            jButton.addActionListener(buttonListener);
            wrapperGeneratorFrame.add(jButton);
            wrapperGeneratorFrame.add(new JLabel("Result files prefix"));
            newHeaderFileName = new JTextField("dll_wrapper");
            wrapperGeneratorFrame.add(newHeaderFileName);
            ActionListener doListener = new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    targetHeader = new File(origHeader.getParentFile(), newHeaderFileName.getText() + ".h");
                    targetCpp = new File(origHeader.getParentFile(), newHeaderFileName.getText() + ".cpp");
                    try {
                        targetHeader.createNewFile();
                        targetCpp.createNewFile();
                        generator.reader = new InputStreamReader(new FileInputStream(origHeader),charset);
                        generator.cppWriter = new OutputStreamWriter(new FileOutputStream(targetCpp), charset);
                        generator.heaerWriter = new OutputStreamWriter(new FileOutputStream(targetHeader), charset);
                        generator.parseReader();
                    } catch (IOException e1) {
                        e1.printStackTrace();
                        JOptionPane.showMessageDialog(wrapperGeneratorFrame, "ERROR:" + e1.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);
                        return;
                    }
                }
            };
            JButton go = new JButton("go");
            go.addActionListener(doListener);
            wrapperGeneratorFrame.add(go, "skip 1");
        }

        public static void main(String []args){
           SwingUtilities.invokeLater(new Runnable() {
               public void run() {
                   WrapperGenerator wgen = new WrapperGenerator();
                   JFrame f = wgen.wrapperGeneratorFrame;
                   wgen.wrapperGeneratorFrame.pack();
                   Point p = getLocalGraphicsEnvironment().getCenterPoint();
                   wgen.wrapperGeneratorFrame.setLocation(p.x-f.getWidth()/2, p.y-f.getHeight()/2);
                   wgen.wrapperGeneratorFrame.setVisible(true);
               }
           });
        }
    }

    /**
     * Does the code parsing and generation
     */
    class WrapperGen{

        /**
         * Method is basically syntax like this: <code>(anything apart from some special chars like #;) functionName(anything)</code>;
         * Method declarations may span many lines.
         */
        private static final Pattern METHOD_PATTERN =
                                 //1          //2              //params
                Pattern.compile("([^#;{}]*\s+\w[\w0-9_]+)\(([^\)]*)\);", Pattern.MULTILINE);
        //1 - specifiers - including stuff like __dllspec(export)...
        //2 - function name
        //3 param list

        /**
         * Generated functions will have name prefixet with #RESULT_PREFIX
         */
        private static final String RESULT_PREFIX = "DLL_WRAPPER_";

        /**
         * Specifiers of result will be prefixed with #RESULT_SPECIFIER
         */
        private static final String RESULT_SPECIFIER =  "__declspec(dllexport) ";

        Reader reader;

        Writer heaerWriter;

        Writer cppWriter;

        public void parseReader() throws IOException {
            StringWriter writer = new StringWriter();
            int read;
            while((read = reader.read())!=-1){
                writer.write(read);
            }
            reader.close();
            heaerWriter.append("#pragma once\n\n\n");
            heaerWriter.append("#include \"stdafx.h\"\n\n\n"); //Standard Visual C++ import file.
            cppWriter.append("#include \"stdafx.h\"\n\n\n");
            Matcher m = METHOD_PATTERN.matcher(writer.getBuffer());
            while(m.find()){
                System.out.println(m.group());
                handleMatch(m);
            }
            cppWriter.close();
            heaerWriter.close();
        }

        public void handleMatch(Matcher m) throws IOException {
            Method meth = new Method(m);
            outputHeader(meth);
            outputCPP(meth);
        }

        private void outputDeclaration(Method m, Writer writer) throws IOException {
            //writer.append(RESULT_SPECIFIER);
            writer.append(m.specifiers);
            writer.append(" ");
            writer.append(RESULT_PREFIX);
            writer.append(m.name);
            writer.append("(");
            for (int ii = 0; ii < m.params.size(); ii++) {
                Parameter p =  m.params.get(ii);
                writer.append(p.specifiers);
                writer.append(" ");
                writer.append(p.name);
                if(ii!=m.params.size()-1){
                    writer.append(", ");
                }
            }
            writer.append(")");
        }

        public void outputHeader(Method m) throws IOException {

            outputDeclaration(m, heaerWriter);
            heaerWriter.append(";\n\n");
        }

        public void outputCPP(Method m) throws IOException {
            cppWriter.append(RESULT_SPECIFIER);
            outputDeclaration(m, cppWriter);
            cppWriter.append("{\n\t");
            if (!m.specifiers.contains("void") || m.specifiers.matches(".*void\s*\*.*")) {
                cppWriter.append("return ");
            }
            cppWriter.append(m.name);
            cppWriter.append("(");
            for (int ii = 0; ii < m.params.size(); ii++) {
                Parameter p =  m.params.get(ii);
                cppWriter.append(p.name);
                if(ii!=m.params.size()-1){
                    cppWriter.append(", ");
                }
            }
            cppWriter.append(");\n");
            cppWriter.append("}\n\n");
        }

    }

    class Method{
        private static final Pattern NAME_REGEXP =
                                     //1      //2
                Pattern.compile("\s*(.*)\s+(\w[\w0-9]+)\s*", Pattern.MULTILINE);
        //1 - all specifiers - including __declspec(dllexport) and such ;)
        //2 - function name

        public final List<Parameter> params;

        public final String name;

        public final String specifiers;

        public Method(Matcher m) {
            params = Collections.unmodifiableList(Parameter.parseParamList(m.group(2)));
            Matcher nameMather = NAME_REGEXP.matcher(m.group(1));
            System.out.println("ALL: " + m.group()); 
            System.out.println("G1: " + m.group(1));
            if(!nameMather.matches()){
                throw new IllegalArgumentException("for string "  + m.group(1));
            }
    //        nameMather.find();
            specifiers = nameMather.group(1);
            name = nameMather.group(2);
        }
    }

    class Parameter{

        static final Pattern PARAMETER_PATTERN =
                                      //1           //2
                Pattern.compile("\s*(?:(.*)\s+)?([\w\*&]+[\w0-9]*[\*&]?)\s*");
        //1 - Most probably parameter type and specifiers, but may also be empty - in which case name is empty, and specifiers are in 2
        //2 - Most probably parameter type, sometimes prefixed with ** or &* ;), also
        // 'char *' will be parsed as grup(1) == char, group(2) = *.

        /**
         * Used to check if group that represenrs parameter name is in fact param specifier like '*'.
          */
        static final Pattern STAR_PATTERN =
                Pattern.compile("\s*([\*&]?)+\s*");

        /**
         * If
         */
        static final Pattern NAME_PATTERN =
                Pattern.compile("\s*([\*&]+)?(\w[\w0-9]*)\s*");

        public final String name;
        public final String specifiers;

         public Parameter(String param, int idx) {
            System.out.println(param);
            Matcher m = PARAMETER_PATTERN.matcher(param);
            String name = null;
            String specifiers = null;
            if(!m.matches()){
                throw new IllegalStateException(param);
            }
            name = m.group(2);
            specifiers = m.group(1);
            if(specifiers==null || specifiers.isEmpty()){ //Case that parameter has no name like 'int', or 'int**'
                specifiers = name;
                name = null;
            }else if(STAR_PATTERN.matcher(name).matches()){ //Case that parameter has no name like 'int *'
                specifiers += name;
                name = null;
            }else if(NAME_PATTERN.matcher(name).matches()){ //Checks if name contains part of type like '**ptrData', and extracts '**'
                Matcher m2 = NAME_PATTERN.matcher(name);
                m2.matches();
                if(m2.group(1)!=null){
                    specifiers += m2.group(1);
                    name = m2.group(2);
                }

            }
            if(name==null){
                name = "param" + idx;
            }
            this.specifiers = specifiers;
            this.name = name;
        }

        public static List<Parameter> parseParamList(String paramList){
            List<Parameter> result = new ArrayList<Parameter>();
            String[] params = paramList.split(",");
            int idx = 0;
            for(String param : params){
                Parameter p = new Parameter(param, idx++);
                result.add(p);
            }
            if(result.size()==1){
                Parameter p = result.get(0);
                if(p.specifiers.matches("\s*void\s*")){
                    return Collections.emptyList();
                }
            }
            return result;
        }
    }

回答by

I'm not aware of anyb tools that will do this automatically, but the process is to create a DLL project and add your libraries to the project. For each function in the header file:

我不知道会自动执行此操作的 anyb 工具，但该过程是创建一个 DLL 项目并将您的库添加到该项目中。对于头文件中的每个函数：

int SomeLibFunc( int x, int y );

you would need to create and export your own function in the DLL;

您需要在 DLL 中创建和导出您自己的函数；

int MyFunc( int x, int y ) {
   return SomLibFunc( x, y );
}

The process is quite mechanical, and you may be able to knock up a script using something like perl to create the DLL source files.

这个过程是相当机械的，你可以使用类似 perl 的东西敲出一个脚本来创建 DLL 源文件。

回答by On Freund

Assuming you don't have access to the source, you can simply create a wrapper DLL that exports the functions you need and delegates to the static library.

假设您无权访问源代码，您可以简单地创建一个包装 DLL，导出您需要的函数并将其委托给静态库。