我正在尝试从 C# 调用 HtmlTidy 库 dll。网上流传着一些例子，但没有确定的例子……而且我遇到了无穷无尽的麻烦。我很确定问题出在 p/invoke 声明上……但如果我知道我哪里出错了，那就危险了。
我从 http://www.paehl.com/open_source/?HTML_Tidy_for_Windows 得到了 libtidy.dll这似乎是当前版本。
这是一个演示我遇到的问题的控制台应用程序:
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
namespace ConsoleApplication5
{
class Program
{
[StructLayout(LayoutKind.Sequential)]
public struct TidyBuffer
{
public IntPtr bp; // Pointer to bytes
public uint size; // # bytes currently in use
public uint allocated; // # bytes allocated
public uint next; // Offset of current input position
};
[DllImport("libtidy.dll")]
public static extern int tidyBufAlloc(ref TidyBuffer tidyBuffer, uint allocSize);
static void Main(string[] args)
{
Console.WriteLine(CleanHtml("<html><body><p>Hello World!</p></body></html>"));
}
static string CleanHtml(string inputHtml)
{
byte[] inputArray = Encoding.UTF8.GetBytes(inputHtml);
byte[] inputArray2 = Encoding.UTF8.GetBytes(inputHtml);
TidyBuffer tidyBuffer2;
tidyBuffer2.size = 0;
tidyBuffer2.allocated = 0;
tidyBuffer2.next = 0;
tidyBuffer2.bp = IntPtr.Zero;
//
// tidyBufAlloc overwrites inputArray2... why? how? seems like
// tidyBufAlloc is stomping on the stack a bit too much... but
// how? I've tried changing the calling convention to cdecl and
// stdcall but no change.
//
Console.WriteLine((inputArray2 == null ? "Array2 null" : "Array2 not null"));
tidyBufAlloc(ref tidyBuffer2, 65535);
Console.WriteLine((inputArray2 == null ? "Array2 null" : "Array2 not null"));
return "did nothing";
}
}
}
总而言之，我有点难过。任何帮助将不胜感激!
最佳答案
您正在使用 TidyBuffer 结构的旧定义。新结构更大，因此当您调用分配方法时，它会覆盖 inputArray2 的堆栈位置。新的定义是:
[StructLayout(LayoutKind.Sequential)]
public struct TidyBuffer
{
public IntPtr allocator; // Pointer to custom allocator
public IntPtr bp; // Pointer to bytes
public uint size; // # bytes currently in use
public uint allocated; // # bytes allocated
public uint next; // Offset of current input position
};
关于c# - 从 C# 调用 .DLL 的奇怪问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/842612/