在制作GacUI读pdb生成代码的过程中，感受到了C++语言设计和dll的需求之间的鸿沟。对于一个充分利用了C++各种功能的类库来说，制作成dll具有非常大的困难，特别是在函数返回POD（Plain Old Data）的引用，和输入输出带有泛型的类上面。所以现在还是决定以源代码的方式来发布GacUI。但是pdb生成代码并没有白做，因为反射还是存在的。但是因为GacUI一共有48000行代码，80多个源代码文件，直接发布使用起来总是不方便。所以我写了个小工具，根据xml的配置来将源代码合并成少数几个比较大的代码文件。这样使用的时候，只需要直接把几个cpp拖进工程里面，就可以使用了。而且根据
之前发布的一个投票，似乎大家也最喜欢这种方法。因此这次的决定，仅仅删掉了作为backup plan的dll方法。
这里我给出小工具的代码和配置文件。这个配置文件是基于GacUI做出来的，不过大家可以修改它，以便用于自己的工程上面：
<?xml version="1.0" encoding="utf-8" ?>
<codegen>
<projects>
<project path="..\..\..\GacUISrc\GacUISrc.vcxproj" />
</projects>
<categories>
<category name="vlpp" pattern="\Library\"/>
<category name="gacui" pattern="\GacUILibrary\">
<except filename="GacUI_WinMain.cpp" />
<except filename="GuiTypeDescriptorImpHelper.cpp" />
<except filename="GuiTypeDescriptorImpProvider_codegen.cpp" />
</category>
</categories>
<output path="..\..\..\GacUILibraryExternal\">
<codepair category="vlpp" filename="Vlpp" />
<codepair category="gacui" filename="GacUI" />
<header source="..\..\..\GacUILibrary\GacUI.h" filename="GacUIIncludes" />
</output>
</codegen>
在这里面，project包含了用于开发这个工程的所有VC++2010的工程文件的地址，然后使用category对他们进行分类（pattern是文件全名的某个部分），最后对每一个部分生成一对cpp和h。在最后生成代码对的时候，如果源代码从一开始就存在依赖关系的话，那么在代码对的h文件里面，会包含依赖的代码对的h。在这里，vlpp是独立的，而gacui依赖了vlpp，所以gacui.h将会#include"vlpp.h"，而cpp只include自己的h文件。output里面除了codepair以外还有header，header是不参与codepair计算的，纯粹为了生成“可以省事直接include”的头文件。在这个例子里面，GacUIIncludes.h将会包含完整的GacUI.h和一部分的Vlpp.h，而且是可以通过编译的。
驱动器 E 中的卷没有标签。
卷的序列号是 9614-79B9
E:\Codeplex\vlpp\Workspace\Tools\Release\SideProjects\GacUISrc\GacUILibraryExternal 的目录
2012/02/29 21:42 <DIR> .
2012/02/29 21:42 <DIR> ..
2012/02/29 21:42 0 dir.txt
2012/02/29 21:18 677,987 GacUI.cpp
2012/02/29 21:18 304,231 GacUI.h
2012/02/29 21:18 481,551 GacUIIncludes.h
2012/02/29 21:18 69,348 Vlpp.cpp
2012/02/29 21:18 310,126 Vlpp.h
6 个文件 1,843,243 字节
2 个目录 166,357,680,128 可用字节
在生成的时候，生成器将会阅读代码本身，然后获取#include "path"，然后对他们的关系进行处理。这个工具的代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Xml.Linq;
using System.Text.RegularExpressions;
namespace Codegen
{
class Program
{
static string[] GetCppFiles(string projectFile)
{
string np = @"http://schemas.microsoft.com/developer/msbuild/2003";
XDocument document = XDocument.Load(projectFile);
return document
.Root
.Elements(XName.Get("ItemGroup", np))
.SelectMany(e => e.Elements(XName.Get("ClCompile", np)))
.Select(e => Path.GetFullPath(Path.GetDirectoryName(projectFile) + "\\" + e.Attribute("Include").Value))
.ToArray();
}
static Dictionary<string, string[]> CategorizeCodeFiles(XDocument config, string[] files)
{
Dictionary<string, string[]> categorizedFiles = new Dictionary<string, string[]>();
foreach (var e in config.Root.Element("categories").Elements("category"))
{
string name = e.Attribute("name").Value;
string pattern = e.Attribute("pattern").Value.ToUpper();
string[] exceptions = e.Elements("except").Select(x => x.Attribute("filename").Value.ToUpper()).ToArray();
categorizedFiles.Add(
name,
files
.Where(f => f.ToUpper().Contains(pattern))
.Where(f => !exceptions.Contains(Path.GetFileName(f).ToUpper()))
.ToArray()
);
}
foreach (var a in categorizedFiles.Keys)
{
foreach (var b in categorizedFiles.Keys)
{
if (a != b)
{
if (categorizedFiles[a].Intersect(categorizedFiles[b]).Count() != 0)
{
throw new ArgumentException();
}
}
}
}
return categorizedFiles;
}
static Dictionary<string, string[]> ScannedFiles = new Dictionary<string, string[]>();
static Regex IncludeRegex = new Regex(@"^\s*\#include\s*""(?<path>[^""]+)""\s*$");
static Regex IncludeSystemRegex = new Regex(@"^\s*\#include\s*\<(?<path>[^""]+)\>\s*$");
static string[] GetIncludedFiles(string codeFile)
{
codeFile = Path.GetFullPath(codeFile).ToUpper();
string[] result = null;
if (!ScannedFiles.TryGetValue(codeFile, out result))
{
List<string> directIncludeFiles = new List<string>();
foreach (var line in File.ReadAllLines(codeFile))
{
Match match = IncludeRegex.Match(line);
if (match.Success)
{
string path = match.Groups["path"].Value;
path = Path.GetFullPath(Path.GetDirectoryName(codeFile) + @"\" + path).ToUpper();
if (!directIncludeFiles.Contains(path))
{
directIncludeFiles.Add(path);
}
}
}
for (int i = directIncludeFiles.Count - 1; i >= 0; i--)
{
directIncludeFiles.InsertRange(i, GetIncludedFiles(directIncludeFiles[i]));
}
result = directIncludeFiles.Distinct().ToArray();
ScannedFiles.Add(codeFile, result);
}
return result;
}
static string[] SortDependecies(Dictionary<string, string[]> dependeicies)
{
var dep = dependeicies.ToDictionary(p => p.Key, p => new HashSet<string>(p.Value));
List<string> sorted = new List<string>();
while (dep.Count > 0)
{
bool found = false;
foreach (var p in dep)
{
if (p.Value.Count == 0)
{
found = true;
sorted.Add(p.Key);
foreach (var q in dep.Values)
{
q.Remove(p.Key);
}
dep.Remove(p.Key);
break;
}
}
if (!found)
{
throw new ArgumentException();
}
}
return sorted.ToArray();
}
static void Combine(string[] files, string outputFilename, HashSet<string> systemIncludes, params string[] externalIncludes)
{
try
{
using (StreamWriter writer = new StreamWriter(new FileStream(outputFilename, FileMode.Create), Encoding.Default))
{
writer.WriteLine("/***********************************************************************");
writer.WriteLine("THIS FILE IS AUTOMATICALLY GENERATED. DO NOT MODIFY");
writer.WriteLine("DEVELOPER: 陈梓瀚(vczh)");
writer.WriteLine("***********************************************************************/");
foreach (var inc in externalIncludes)
{
writer.WriteLine("#include \"{0}\"", inc);
}
foreach (var file in files)
{
writer.WriteLine("");
writer.WriteLine("/***********************************************************************");
writer.WriteLine(file);
writer.WriteLine("***********************************************************************/");
foreach (var line in File.ReadAllLines(file, Encoding.Default))
{
Match match = null;
match = IncludeSystemRegex.Match(line);
if (match.Success)
{
if (systemIncludes.Add(match.Groups["path"].Value.ToUpper()))
{
writer.WriteLine(line);
}
}
else
{
match = IncludeRegex.Match(line);
if (!match.Success)
{
writer.WriteLine(line);
}
}
}
}
}
Console.WriteLine("Succeeded to write: {0}", outputFilename);
}
catch (Exception)
{
Console.WriteLine("Failed to write: {0}", outputFilename);
}
}
static void Combine(string inputFilename, string outputFilename, params string[] externalIncludes)
{
HashSet<string> systemIncludes = new HashSet<string>();
string[] files = GetIncludedFiles(inputFilename).Concat(new string[] { inputFilename }).Distinct().ToArray();
Combine(files, outputFilename, systemIncludes, externalIncludes);
}
static void Main(string[] args)
{
// load configuration
XDocument config = XDocument.Load("CodegenConfig.xml");
string folder = Path.GetDirectoryName(typeof(Program).Assembly.Location) + "\\";
// collect project files
string[] projectFiles = config.Root
.Element("projects")
.Elements("project")
.Select(e => Path.GetFullPath(folder + e.Attribute("path").Value))
.ToArray();
// collect code files
string[] unprocessedCppFiles = projectFiles.SelectMany(GetCppFiles).Distinct().ToArray();
string[] unprocessedHeaderFiles = unprocessedCppFiles.SelectMany(GetIncludedFiles).Distinct().ToArray();
// categorize code files
var categorizedCppFiles = CategorizeCodeFiles(config, unprocessedCppFiles);
var categorizedHeaderFiles = CategorizeCodeFiles(config, unprocessedHeaderFiles);
var outputFolder = Path.GetFullPath(folder + config.Root.Element("output").Attribute("path").Value);
var categorizedOutput = config.Root
.Element("output")
.Elements("codepair")
.ToDictionary(
e => e.Attribute("category").Value,
e => Path.GetFullPath(outputFolder + e.Attribute("filename").Value
));
// calculate category dependencies
var categoryDependencies = categorizedCppFiles
.Keys
.Select(k =>
{
var headerFiles = categorizedCppFiles[k]
.SelectMany(GetIncludedFiles)
.Distinct()
.ToArray();
var keys = categorizedHeaderFiles
.Where(p => p.Value.Any(h => headerFiles.Contains(h)))
.Select(p => p.Key)
.Except(new string[] { k })
.ToArray();
return Tuple.Create(k, keys);
})
.ToDictionary(t => t.Item1, t => t.Item2);
// sort categories by dependencies
var categoryOrder = SortDependecies(categoryDependencies);
Dictionary<string, HashSet<string>> categorizedSystemIncludes = new Dictionary<string, HashSet<string>>();
// generate code pair header files
foreach (var c in categoryOrder)
{
string output = categorizedOutput[c] + ".h";
List<string> includes = new List<string>();
foreach (var dep in categoryDependencies[c])
{
includes.AddRange(categorizedSystemIncludes[dep]);
}
HashSet<string> systemIncludes = new HashSet<string>(includes.Distinct());
categorizedSystemIncludes.Add(c, systemIncludes);
Combine(
categorizedHeaderFiles[c],
output,
systemIncludes,
categoryDependencies[c]
.Select(d => Path.GetFileName(categorizedOutput[d] + ".h"))
.ToArray()
);
}
// generate code pair cpp files
foreach (var c in categoryOrder)
{
string output = categorizedOutput[c];
string outputHeader = Path.GetFileName(output + ".h");
string outputCpp = output + ".cpp";
HashSet<string> systemIncludes = categorizedSystemIncludes[c];
Combine(
categorizedCppFiles[c],
outputCpp,
systemIncludes,
outputHeader
);
}
// generate header files
var headerOutput = config.Root
.Element("output")
.Elements("header")
.ToDictionary(
e => Path.GetFullPath(folder + e.Attribute("source").Value),
e => Path.GetFullPath(outputFolder + e.Attribute("filename").Value)
);
foreach (var o in headerOutput)
{
Combine(o.Key, o.Value + ".h");
}
}
}
}
代码已经checkin在了
Vczh Library++3.0（Tools\Release\SideProjects\GacUISrc\GacUISrc.sln）下面，里面也包含了生成后的代码。
posted on 2012-02-29 05:34
陈梓瀚(vczh) 阅读(4003)
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GacUI