在运行时设置缓冲区长度时，如何使用read（ubyte [] buffer）读取BufferedFile？ [英] How do i read a BufferedFile using read(ubyte[] buffer) when the buffer length is set at runtime?

问题描述

我有一个二进制文件，实际上是文件的堆栈，格式为：

I have a binary file that is really a stack of files, the format is:

lengh_of_subfile,subfile

length_of_subfile 是64位整数。我可以读取 long 没问题，但是当我尝试为子文件创建缓冲区时，出现编译错误，提示无法在编译时读取。我想念什么？我用erlang，PHP和C＃编写了一个相同的提取工具... D让我陷入循环。

length_of_subfile is a 64-bit integer. I can read the long no problem but when I try to create a buffer for the subfile I get compile errors saying it cannot be read at compile time. What am I missing? I've written an identical extraction tool in erlang, PHP and C#... D is throwing me for a loop.

void main(string args[]) {
    Stream file = new BufferedFile(args[1], FileMode.In);
    int counter = 0;
    while(file.position < file.size) {
        ulong len;
        file.read(len);
        ubyte[len] ogg;
        file.read(ogg);
        string outname = getcwd() ~ "/" ~ to!string(counter) ~ ".ogg";
        Stream oggout = new BufferedFile(outname, FileMode.OutNew);
        oggout.write(ogg);
        writefln("Creating file " ~ to!string(counter) ~ ".ogg");
        counter++;
    }   
}

推荐答案

        ubyte[len] ogg;

写

        ubyte[] ogg = new ubyte[len];

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