| // Copyright 2013-2014 The Rust Project Developers. |
| // Copyright 2018 The Uuid Project Developers. |
| // |
| // See the COPYRIGHT file at the top-level directory of this distribution. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| //! [`Uuid`] parsing constructs and utilities. |
| //! |
| //! [`Uuid`]: ../struct.Uuid.html |
| |
| mod core_support; |
| #[cfg(feature = "std")] |
| mod std_support; |
| |
| /// The expected value. |
| #[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)] |
| pub enum Expected { |
| /// Expected any one of the given values. |
| Any(&'static [usize]), |
| /// Expected the given value. |
| Exact(usize), |
| /// Expected any values in the given range. |
| Range { |
| /// The minimum expected value. |
| min: usize, |
| /// The maximum expected value. |
| max: usize, |
| }, |
| } |
| |
| /// An error that can occur while parsing a [`Uuid`] string. |
| /// |
| /// [`Uuid`]: ../struct.Uuid.html |
| #[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)] |
| pub enum ParseError { |
| /// Invalid character in the [`Uuid`] string. |
| /// |
| /// [`Uuid`]: ../struct.Uuid.html |
| InvalidCharacter { |
| /// The expected characters. |
| expected: &'static str, |
| /// The invalid character found. |
| found: char, |
| /// The invalid character position. |
| index: usize, |
| }, |
| /// Invalid number of segments in the [`Uuid`] string. |
| /// |
| /// [`Uuid`]: ../struct.Uuid.html |
| InvalidGroupCount { |
| /// The expected number of segments. |
| // TODO: explain multiple segment count. |
| // BODY: Parsers can expect a range of Uuid segment count. |
| // This needs to be expanded on. |
| expected: Expected, |
| /// The number of segments found. |
| found: usize, |
| }, |
| /// Invalid length of a segment in a [`Uuid`] string. |
| /// |
| /// [`Uuid`]: ../struct.Uuid.html |
| InvalidGroupLength { |
| /// The expected length of the segment. |
| expected: Expected, |
| /// The length of segment found. |
| found: usize, |
| /// The segment with invalid length. |
| group: usize, |
| }, |
| /// Invalid length of the [`Uuid`] string. |
| /// |
| /// [`Uuid`]: ../struct.Uuid.html |
| InvalidLength { |
| /// The expected length(s). |
| // TODO: explain multiple lengths. |
| // BODY: Parsers can expect a range of Uuid lenghts. |
| // This needs to be expanded on. |
| expected: Expected, |
| /// The invalid length found. |
| found: usize, |
| }, |
| } |
| |
| impl ParseError { |
| fn _description(&self) -> &str { |
| match *self { |
| ParseError::InvalidCharacter { .. } => "invalid character", |
| ParseError::InvalidGroupCount { .. } => "invalid number of groups", |
| ParseError::InvalidGroupLength { .. } => "invalid group length", |
| ParseError::InvalidLength { .. } => "invalid length", |
| } |
| } |
| } |
| |
| /// Check if the length matches any of the given criteria lengths. |
| pub(crate) fn len_matches_any(len: usize, crits: &[usize]) -> bool { |
| for crit in crits { |
| if len == *crit { |
| return true; |
| } |
| } |
| |
| false |
| } |
| |
| /// Check if the length matches any criteria lengths in the given range |
| /// (inclusive). |
| #[allow(dead_code)] |
| pub(crate) fn len_matches_range(len: usize, min: usize, max: usize) -> bool { |
| for crit in min..(max + 1) { |
| if len == crit { |
| return true; |
| } |
| } |
| |
| false |
| } |
| |
| // Accumulated length of each hyphenated group in hex digits. |
| pub(crate) const ACC_GROUP_LENS: [usize; 5] = [8, 12, 16, 20, 32]; |
| |
| // Length of each hyphenated group in hex digits. |
| pub(crate) const GROUP_LENS: [usize; 5] = [8, 4, 4, 4, 12]; |