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use std::{convert, str, ops};
use crate::{Error, Result};
#[derive(Copy, Clone)]
pub struct Owned(());
impl<'a> crate::traits::Owned<'a> for Owned {
type Reader = Reader<'a>;
type Builder = Builder<'a>;
}
pub type Reader<'a> = &'a str;
pub fn new_reader<'a>(v : &'a [u8]) -> Result<Reader<'a>> {
match str::from_utf8(v) {
Ok(v) => Ok(v),
Err(e) => Err(Error::failed(
format!("Text contains non-utf8 data: {:?}", e))),
}
}
impl <'a> crate::traits::FromPointerReader<'a> for Reader<'a> {
fn get_from_pointer(reader: &crate::private::layout::PointerReader<'a>, default: Option<&'a [crate::Word]>) -> Result<Reader<'a>> {
reader.get_text(default)
}
}
pub struct Builder<'a> {
bytes: &'a mut [u8],
pos: usize,
}
impl <'a> Builder <'a> {
pub fn new<'b>(bytes: &'b mut [u8], pos: u32) -> Result<Builder<'b>> {
if pos != 0 {
if let Err(e) = str::from_utf8(bytes) {
return Err(Error::failed(
format!("Text contains non-utf8 data: {:?}", e)))
}
}
Ok(Builder { bytes: bytes, pos: pos as usize })
}
pub fn push_ascii(&mut self, ascii: u8) {
assert!(ascii < 128);
self.bytes[self.pos] = ascii;
self.pos += 1;
}
pub fn push_str(&mut self, string: &str) {
let bytes = string.as_bytes();
for ii in 0..bytes.len() {
self.bytes[self.pos + ii] = bytes[ii];
}
self.pos += bytes.len();
}
pub fn clear(&mut self) {
for ii in 0..self.pos {
self.bytes[ii] = 0;
}
self.pos = 0;
}
}
impl <'a> ops::Deref for Builder <'a> {
type Target = str;
fn deref<'b>(&'b self) -> &'b str {
str::from_utf8(self.bytes)
.expect("text::Builder contents are checked for utf8-validity upon construction")
}
}
impl <'a> ops::DerefMut for Builder <'a> {
fn deref_mut<'b>(&'b mut self) -> &'b mut str {
str::from_utf8_mut(self.bytes)
.expect("text::Builder contents are checked for utf8-validity upon construction")
}
}
impl <'a> convert::AsRef<str> for Builder<'a> {
fn as_ref<'b>(&'b self) -> &'b str {
str::from_utf8(self.bytes)
.expect("text::Builder contents are checked for utf8-validity upon construction")
}
}
impl <'a> crate::traits::FromPointerBuilder<'a> for Builder<'a> {
fn init_pointer(builder: crate::private::layout::PointerBuilder<'a>, size: u32) -> Builder<'a> {
builder.init_text(size)
}
fn get_from_pointer(builder: crate::private::layout::PointerBuilder<'a>, default: Option<&'a [crate::Word]>) -> Result<Builder<'a>> {
builder.get_text(default)
}
}
impl <'a> crate::traits::SetPointerBuilder<Builder<'a>> for Reader<'a> {
fn set_pointer_builder<'b>(pointer: crate::private::layout::PointerBuilder<'b>,
value: Reader<'a>,
_canonicalize: bool)
-> Result<()>
{
pointer.set_text(value);
Ok(())
}
}