Write struct to file

[Andrej Mitrovic]

On 2/25/12, Ali Çehreli <acehreli at yahoo.com> wrote:
> That passes because lal.name.ptr and dup.name.ptr have the same value.
> Maybe that wasn't the intention but the data is not really in the file.

I'm not sure where you're getting that from:

import std.stdio;

struct nagger
{
    string name;
    int age;
    double weight;
    string msg;
}

void main(string[] args)
{
    if (args[1] == "write")
    {
        nagger lal;
        lal.name   = "name";
        lal.age    = 23;
        lal.weight = 108.5;
        lal.msg    = "msg";

        auto file       = File("test.bin", "w");
        auto writeBytes = fwrite(&lal, byte.sizeof, lal.sizeof, file.getFP());
    }
    else
    if (args[1] == "read")
    {
        nagger dup;
        auto file = File("test.bin", "r");
        auto readBytes = fread(&dup, byte.sizeof, dup.sizeof, file.getFP());
        writeln(dup);
    }
}

$ rdmd test.d write
$ rdmd test.d read
nagger("name", 23, 108.5, "msg")