ggml 0.1.1

Semi-idiomatic Rust bindings for the ggml library (from `ggml-sys`).
Documentation 
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//! Utilities for reading and writing.

use std::io::{BufRead, Write};

/// Read a fixed-size array of bytes from a reader.
pub fn read_bytes<const N: usize>(reader: &mut dyn BufRead) -> Result<[u8; N], std::io::Error> {
    let mut bytes = [0u8; N];
    reader.read_exact(&mut bytes)?;
    Ok(bytes)
}

/// Read a `i32` from a reader.
pub fn read_i32(reader: &mut dyn BufRead) -> Result<i32, std::io::Error> {
    Ok(i32::from_le_bytes(read_bytes::<4>(reader)?))
}

/// Read a `u32` from a reader.
pub fn read_u32(reader: &mut dyn BufRead) -> Result<u32, std::io::Error> {
    Ok(u32::from_le_bytes(read_bytes::<4>(reader)?))
}

/// Read a `f32` from a reader.
pub fn read_f32(reader: &mut dyn BufRead) -> Result<f32, std::io::Error> {
    Ok(f32::from_le_bytes(read_bytes::<4>(reader)?))
}

/// Read a variable-length array of bytes from a reader.
pub fn read_bytes_with_len(
    reader: &mut dyn BufRead,
    len: usize,
) -> Result<Vec<u8>, std::io::Error> {
    let mut bytes = vec![0u8; len];
    reader.read_exact(&mut bytes)?;
    Ok(bytes)
}

/// Write a `i32` from a writer.
pub fn write_i32(writer: &mut dyn Write, value: i32) -> Result<(), std::io::Error> {
    writer.write_all(&value.to_le_bytes())
}

/// Write a `u32` from a writer.
pub fn write_u32(writer: &mut dyn Write, value: u32) -> Result<(), std::io::Error> {
    writer.write_all(&value.to_le_bytes())
}

/// Write a `f32` from a writer.
pub fn write_f32(writer: &mut dyn Write, value: f32) -> Result<(), std::io::Error> {
    writer.write_all(&value.to_le_bytes())
}

// NOTE: Implementation from #![feature(buf_read_has_data_left)]
/// Check if there is any data left in the reader.
pub fn has_data_left(reader: &mut impl BufRead) -> Result<bool, std::io::Error> {
    reader.fill_buf().map(|b| !b.is_empty())
}