Re: fread return value?

[Ali Çehreli via Digitalmars-d-learn]

On 7/30/25 12:45 PM, Andy Valencia wrote:
> Scratching my head here.  fread()
I haven't used anything other than rawRead() for that purpose. rawRead() 
returns a slice of what it's just read:

import std.algorithm;
import std.exception;
import std.file;
import std.format;
import std.stdio;

void main(string[] args) {
    enforce(args.length == 2, "Please provide the name of the file to 
read.");

    auto file = File(args[1], "r");
    auto size = getSize(file.name);

    auto buffer = new ubyte[1024 * 1024];
    while (size) {
        const readSize = min(size, buffer.length);
        auto read = file.rawRead(buffer[0..readSize]);
        enforce(read.length == readSize, format!"Read %,s bytes instead 
of %,s."(read.length, readSize));

        writefln!"Read %,s bytes"(read.length);

        size -= read.length;
    }
}

Ali