87 lines
2.0 KiB
Rust
87 lines
2.0 KiB
Rust
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#![feature(convert)]
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extern crate alchemy;
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extern crate sigils;
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use alchemy::U64_BYTES;
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use alchemy::{Endianess, Transmutable};
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use sigils::vector::Vector2;
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/// The size of 2 u64 whole numbers.
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/// This would be different if the contained type
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/// was something different, like an i16 or f32.
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const SIZE_OF_VECTOR_2: usize = U64_BYTES * 2;
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/// This just help pretty up the printing of an array of bytes.
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fn stringify_array(buffer: &[u8]) -> String
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{
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let mut result: String;
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let mut count: usize;
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// Create a new string that starts with just
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// the array opening bracket.
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result = String::new();
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result.push_str("[");
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// Loop through the buffer keeping track
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// of our place in it.
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count = 0usize;
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for byte in buffer
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{
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// Handle priting the last value differently.
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if count >= buffer.len() - 1
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{
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result.push_str(byte.to_string().as_str());
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}
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else
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{
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result.push_str(byte.to_string().as_str());
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result.push_str(", ");
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}
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// Mark that we are going to look at
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// the next byte in the array.
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count += 1;
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}
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// Add the array closing bracket and
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// return the new String.
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result.push_str("]");
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result
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}
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pub fn main()
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{
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let vec: Vector2<u64>;
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let final_vec: Vector2<u64>;
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let endianess: Endianess;
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let mut buffer: [u8; SIZE_OF_VECTOR_2];
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// Initialize the variables.
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vec = Vector2::<u64>::new(629u64, 1985u64);
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buffer = [0u8; SIZE_OF_VECTOR_2];
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endianess = Endianess::PLATFORM;
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println!("Transmuting a Vector2:");
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println!("Converting the value [{}, {}] into and out of an array of bytes.",
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vec.x, vec.y);
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println!("Buffer starts as: {}", stringify_array(&buffer));
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// Convert the Vector2 into an array of bytes.
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vec.to_bytes(&mut buffer, endianess);
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println!("Buffer contains: {}", stringify_array(&buffer));
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// Convert the array of bytes into a Vector2.
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final_vec = Vector2::from_bytes(&buffer, endianess);
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println!("The buffer converts back to: [{}, {}]", final_vec.x, final_vec.y);
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}
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