Function alloc

modules/llrt_buffer/src/buffer.rs:103–136

Static Methods

(
    ctx: Ctx<'js>,
    length: usize,
    fill: Opt<Value<'js>>,
    encoding: Opt<String>,
)

// Static Methods
fn alloc<'js>(
    ctx: Ctx<'js>,
    length: usize,
    fill: Opt<Value<'js>>,
    encoding: Opt<String>,
) -> Result<Value<'js>> {
    if let Some(value) = fill.0 {
        if let Some(value) = value.as_string() {
            let string = value.to_string()?;

            if let Some(encoding) = encoding.0 {
                let encoder = Encoder::from_str(&encoding).or_throw(&ctx)?;
                let bytes = encoder.decode_from_string(string).or_throw(&ctx)?;
                return alloc_byte_ref(&ctx, &bytes, length);
            }

            let byte_ref = string.as_bytes();

            return alloc_byte_ref(&ctx, byte_ref, length);
        }
        if let Some(value) = value.as_int() {
            let bytes = vec![value as u8; length];
            return Buffer(bytes).into_js(&ctx);
        }
        if let Some(obj) = value.as_object() {
            if let Some(ob) = ObjectBytes::from_array_buffer(obj)? {
                let bytes = ob.as_bytes(&ctx)?;
                return alloc_byte_ref(&ctx, bytes, length);
            }
        }
    }

    Buffer(vec![0; length]).into_js(&ctx)
}

fn alloc_byte_ref<'js>(ctx: &Ctx<'js>, byte_ref: &[u8], length: usize) -> Result<Value<'js>> {
    let mut bytes = vec![0; length];