#![feature(convert)]

extern crate alchemy;


use alchemy::U16_BYTES;
use alchemy::{Converter, Endianess, PlatformEndian, Transmutable};
use alchemy::platform_to_network_order;



fn use_converter()
{
   let num: u16;
   let final_num: u16;
   let mut buffer: Vec<u8>;

   // Initialize the variables.
   num = 32832u16;
   buffer = Vec::new();

   println!("Converting the value {} into and out of an array of bytes.", num);
   println!("Buffer starts as: {}", stringify_array(buffer.as_slice()));

   // Convert the short point number into an array of bytes.
   buffer = PlatformEndian::u16_to_bytes(num);

   println!("Buffer contains: {}", stringify_array(buffer.as_slice()));

   // Convert the array of bytes into a short number.
   final_num = PlatformEndian::bytes_to_u16(buffer.as_slice());
   println!("The buffer converts back to: {}", final_num);
}

pub fn use_transmutable()
{
   let num: u16;
   let final_num: u16;
   let endianess: Endianess;
   let mut buffer: Vec<u8>;

   // Initialize the variables.
   num = 32832u16;
   buffer = Vec::new();
   endianess = Endianess::Platform;

   println!("Converting the value {} into and out of an array of bytes.", num);
   println!("Buffer starts as: {}", stringify_array(buffer.as_slice()));

   // Convert the short point number into an array of bytes.
   buffer = num.to_bytes(endianess);

   println!("Buffer contains: {}", stringify_array(buffer.as_slice()));

   // Convert the array of bytes into a short number.
   final_num = u16::from_bytes(buffer.as_slice(), endianess);
   println!("The buffer converts back to: {}", final_num);
}

/// This just help pretty up the printing of an array of bytes.
fn stringify_array(buffer: &[u8]) -> String
{
   let mut result: String;
   let mut count: usize;

   // Create a new string that starts with just
   // the array opening bracket.
   result = String::new();
   result.push_str("[");

   // Loop through the buffer keeping track
   // of our place in it.
   count = 0usize;
   for byte in buffer
   {
      // Handle priting the last value differently.
      if count >= buffer.len() - 1
      {
         result.push_str(byte.to_string().as_str());
      }
      else
      {
         result.push_str(byte.to_string().as_str());
         result.push_str(", ");
      }

      // Mark that we are going to look at
      // the next byte in the array.
      count += 1;
   }

   // Add the array closing bracket and
   // return the new String.
   result.push_str("]");
   result
}


pub fn main()
{
   println!("Using converter:");
   use_converter();

   println!("");

   println!("Using transmutable:");
   use_transmutable();

   println!("");

   println!("This turns into a network value of:  {}",
            platform_to_network_order(32832u16));
}