Re: [pbs-devel] [RFC proxmox] support quoted strings in property strings

[Fabian Ebner <f.ebner@proxmox.com>]

> +fn parse_quoted_string<'s>(data: &'_ mut &'s str) -> Result<Cow<'s, str>, Error> {
> +    let data_out = data;
> +    let data = data_out.as_bytes();
> +
> +    if data[0] != b'"' {
> +        bail!("not a quoted string");
> +    }
> +
> +    let mut i = 1;
> +    while i != data.len() {
> +        if data[i] == b'"' {

What if a byte that's part of an UTF-8 character is equal to b'"', or
can that not happen?

> +            // unsafe: we're at an ascii boundary and index [0] is an ascii quote
> +            let value = unsafe { std::str::from_utf8_unchecked(&data[1..i]) };
> +            *data_out = unsafe { std::str::from_utf8_unchecked(&data[(i + 1)..]) };
> +            return Ok(Cow::Borrowed(value));
> +        } else if data[i] == b'\\' {
> +            // we cannot borrow
> +            break;
> +        }
> +        i += 1;
> +    }