├── rust-toolchain.toml ├── tea.yaml ├── .gitignore ├── .editorconfig ├── .github ├── dependabot.yml └── workflows │ ├── release.yml │ └── checks.yml ├── .rustfmt.toml ├── Cargo.toml ├── LICENSE-MIT ├── README.md ├── Cargo.lock ├── src ├── test.rs └── lib.rs └── LICENSE-GPL3 /rust-toolchain.toml: -------------------------------------------------------------------------------- 1 | [toolchain] 2 | channel = "stable" 3 | components = ["cargo", "clippy", "rust-src", "rustc", "rustfmt"] 4 | profile = "minimal" 5 | -------------------------------------------------------------------------------- /tea.yaml: -------------------------------------------------------------------------------- 1 | # https://tea.xyz/what-is-this-file 2 | --- 3 | version: 1.0.0 4 | codeOwners: 5 | - '0x3c173321Cc42A93966045db123B2Ee8Eb384966A' 6 | quorum: 1 7 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Integrated development environment. 2 | .vscode 3 | 4 | # Package manager. 5 | ## Cargo. 6 | target 7 | ## NPM. 8 | node_modules 9 | 10 | # System. 11 | .DS_Store 12 | 13 | # Test data. 14 | *.bak 15 | .env 16 | tmp 17 | -------------------------------------------------------------------------------- /.editorconfig: -------------------------------------------------------------------------------- 1 | root = true 2 | 3 | [*] 4 | charset=utf-8 5 | end_of_line=lf 6 | indent_size=tab 7 | indent_style=tab 8 | insert_final_newline=true 9 | max_line_length=100 10 | tab_width=4 11 | trim_trailing_whitespace=true 12 | 13 | [*.py] 14 | charset=utf-8 15 | indent_size=4 16 | indent_style=space 17 | 18 | [*.{sh,yml,yaml}] 19 | indent_size=2 20 | indent_style=space 21 | tab_width=8 22 | -------------------------------------------------------------------------------- /.github/dependabot.yml: -------------------------------------------------------------------------------- 1 | version: 2 2 | updates: 3 | - package-ecosystem: "cargo" 4 | directory: "/" 5 | schedule: 6 | interval: "daily" 7 | time: "00:00" 8 | labels: 9 | - "Bot" 10 | - "Dep" 11 | - package-ecosystem: "github-actions" 12 | directory: "/" 13 | schedule: 14 | interval: "daily" 15 | time: "00:00" 16 | labels: 17 | - "Bot" 18 | - "GA" 19 | -------------------------------------------------------------------------------- /.rustfmt.toml: -------------------------------------------------------------------------------- 1 | # Basic. 2 | edition = "2024" 3 | hard_tabs = true 4 | max_width = 100 5 | tab_spaces = 4 6 | 7 | # Import. 8 | imports_granularity = "Crate" 9 | reorder_imports = true 10 | 11 | # Comments. 12 | comment_width = 100 13 | wrap_comments = true 14 | 15 | # Misc. 16 | format_code_in_doc_comments = true 17 | inline_attribute_width = 100 18 | match_arm_blocks = false 19 | match_block_trailing_comma = true 20 | newline_style = "Unix" 21 | reorder_impl_items = true 22 | reorder_modules = true 23 | use_field_init_shorthand = true 24 | use_small_heuristics = "Max" 25 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | authors = ["Hack Ink ", "Xavier Lau "] 3 | description = "Unescape strings with escape sequences written out as literal characters." 4 | edition = "2021" 5 | homepage = "https://hack.ink/unescaper" 6 | keywords = [ 7 | "escape", 8 | "string", 9 | "unescape", 10 | ] 11 | license = "GPL-3.0/MIT" 12 | name = "unescaper" 13 | readme = "README.md" 14 | repository = "https://github.com/hack-ink/unescaper" 15 | version = "0.1.8" 16 | 17 | [package.metadata.docs.rs] 18 | all-features = true 19 | 20 | [profile.ci-dev] 21 | incremental = false 22 | inherits = "dev" 23 | 24 | [profile.ci-release] 25 | inherits = "release" 26 | lto = true 27 | 28 | [dependencies] 29 | thiserror = { version = "2.0" } 30 | -------------------------------------------------------------------------------- /.github/workflows/release.yml: -------------------------------------------------------------------------------- 1 | name: Release 2 | 3 | env: 4 | CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse 5 | CARGO_TERM_COLOR: always 6 | 7 | RUST_BACKTRACE: full 8 | 9 | on: 10 | push: 11 | tags: 12 | - "v[0-9]+.[0-9]+.[0-9]+" 13 | 14 | jobs: 15 | release: 16 | name: Release 17 | runs-on: ubuntu-latest 18 | steps: 19 | - name: Publish 20 | uses: softprops/action-gh-release@v2 21 | with: 22 | discussion_category_name: Announcements 23 | generate_release_notes: true 24 | 25 | publish-on-crates-io: 26 | name: Publish on crates.io 27 | runs-on: ubuntu-latest 28 | steps: 29 | - name: Fetch latest code 30 | uses: actions/checkout@v4 31 | - name: Login 32 | run: cargo login ${{ secrets.CARGO_REGISTRY_TOKEN }} 33 | - name: Publish 34 | run: cargo publish --locked 35 | -------------------------------------------------------------------------------- /LICENSE-MIT: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2023 Hack Ink 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Unescaper 4 | ### Unescape strings with escape sequences written out as literal characters. 5 | 6 | [![License GPLv3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0) 7 | [![License MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT) 8 | [![Checks](https://github.com/hack-ink/unescaper/actions/workflows/checks.yml/badge.svg?branch=main)](https://github.com/hack-ink/unescaper/actions/workflows/checks.yml) 9 | [![GitHub tag (latest by date)](https://img.shields.io/github/v/tag/hack-ink/unescaper)](https://github.com/hack-ink/unescaper/tags) 10 | [![GitHub code lines](https://tokei.rs/b1/github/hack-ink/unescaper)](https://github.com/hack-ink/unescaper) 11 | [![GitHub last commit](https://img.shields.io/github/last-commit/hack-ink/unescaper?color=red&style=plastic)](https://github.com/hack-ink/unescaper) 12 | 13 |
14 | 15 | ## Usage 16 | [More Examples](src/test.rs) 17 | ```rust 18 | fn main() { 19 | assert_eq!(unescaper::unescape(r"\u000a").unwrap(), "\n"); 20 | assert_eq!(unescaper::unescape(r"\u{a}").unwrap(), "\n"); 21 | assert_eq!(unescaper::unescape(r"\x0a").unwrap(), "\n"); 22 | assert_eq!(unescaper::unescape(r"\12").unwrap(), "\n"); 23 | } 24 | ``` 25 | 26 | ## Thanks 27 | The idea comes from [unescape-rs](https://github.com/saghm/unescape-rs).
28 | The last commit of that repository was seven years ago.
29 | So, I think it is no longer maintained.
30 | That's why I created this repository, and I have made some improvements. 31 | -------------------------------------------------------------------------------- /Cargo.lock: -------------------------------------------------------------------------------- 1 | # This file is automatically @generated by Cargo. 2 | # It is not intended for manual editing. 3 | version = 4 4 | 5 | [[package]] 6 | name = "proc-macro2" 7 | version = "1.0.95" 8 | source = "registry+https://github.com/rust-lang/crates.io-index" 9 | checksum = "02b3e5e68a3a1a02aad3ec490a98007cbc13c37cbe84a3cd7b8e406d76e7f778" 10 | dependencies = [ 11 | "unicode-ident", 12 | ] 13 | 14 | [[package]] 15 | name = "quote" 16 | version = "1.0.40" 17 | source = "registry+https://github.com/rust-lang/crates.io-index" 18 | checksum = "1885c039570dc00dcb4ff087a89e185fd56bae234ddc7f056a945bf36467248d" 19 | dependencies = [ 20 | "proc-macro2", 21 | ] 22 | 23 | [[package]] 24 | name = "syn" 25 | version = "2.0.101" 26 | source = "registry+https://github.com/rust-lang/crates.io-index" 27 | checksum = "8ce2b7fc941b3a24138a0a7cf8e858bfc6a992e7978a068a5c760deb0ed43caf" 28 | dependencies = [ 29 | "proc-macro2", 30 | "quote", 31 | "unicode-ident", 32 | ] 33 | 34 | [[package]] 35 | name = "thiserror" 36 | version = "2.0.17" 37 | source = "registry+https://github.com/rust-lang/crates.io-index" 38 | checksum = "f63587ca0f12b72a0600bcba1d40081f830876000bb46dd2337a3051618f4fc8" 39 | dependencies = [ 40 | "thiserror-impl", 41 | ] 42 | 43 | [[package]] 44 | name = "thiserror-impl" 45 | version = "2.0.17" 46 | source = "registry+https://github.com/rust-lang/crates.io-index" 47 | checksum = "3ff15c8ecd7de3849db632e14d18d2571fa09dfc5ed93479bc4485c7a517c913" 48 | dependencies = [ 49 | "proc-macro2", 50 | "quote", 51 | "syn", 52 | ] 53 | 54 | [[package]] 55 | name = "unescaper" 56 | version = "0.1.8" 57 | dependencies = [ 58 | "thiserror", 59 | ] 60 | 61 | [[package]] 62 | name = "unicode-ident" 63 | version = "1.0.18" 64 | source = "registry+https://github.com/rust-lang/crates.io-index" 65 | checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512" 66 | -------------------------------------------------------------------------------- /.github/workflows/checks.yml: -------------------------------------------------------------------------------- 1 | name: Checks 2 | 3 | env: 4 | CACHE_VERSION: 0 5 | 6 | CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse 7 | CARGO_TERM_COLOR: always 8 | 9 | RUST_BACKTRACE: full 10 | 11 | on: 12 | push: 13 | branches: 14 | - main 15 | pull_request: 16 | branches: 17 | - main 18 | merge_group: 19 | 20 | jobs: 21 | cargo-checks: 22 | name: Task cargo ${{ matrix.action }} 23 | runs-on: ubuntu-latest 24 | strategy: 25 | matrix: 26 | action: [clippy, fmt, nextest] 27 | steps: 28 | - name: Fetch latest code 29 | uses: actions/checkout@v4 30 | - name: Setup build environment 31 | if: matrix.action != 'fmt' 32 | run: rustup show 33 | - uses: Swatinem/rust-cache@v2 34 | if: matrix.action != 'fmt' 35 | with: 36 | prefix-key: ${{ env.CACHE_VERSION }} 37 | key: ${{ matrix.action }} 38 | - name: Cargo clippy 39 | if: matrix.action == 'clippy' 40 | uses: giraffate/clippy-action@v1 41 | with: 42 | clippy_flags: --workspace --all-features --all-targets --locked 43 | - name: Cargo fmt 44 | if: matrix.action == 'fmt' 45 | run: | 46 | rustup toolchain install nightly 47 | rustup component add rustfmt --toolchain nightly 48 | cargo +nightly fmt --all -- --check 49 | - name: Install cargo-nextest 50 | if: matrix.action == 'nextest' 51 | uses: taiki-e/install-action@nextest 52 | - name: Cargo nextest 53 | if: matrix.action == 'nextest' 54 | run: cargo nextest run --cargo-profile ci-dev --workspace --all-features --all-targets --locked 55 | - name: Fast fail 56 | uses: vishnudxb/cancel-workflow@v1.2 57 | if: failure() 58 | with: 59 | repo: hack-ink/unescaper 60 | workflow_id: ${{ github.run_id }} 61 | access_token: ${{ github.token }} 62 | -------------------------------------------------------------------------------- /src/test.rs: -------------------------------------------------------------------------------- 1 | macro_rules! unescape_assert_eq { 2 | ($l:expr, $r:expr) => { 3 | assert_eq!(crate::unescape($l).unwrap(), $r); 4 | }; 5 | } 6 | 7 | macro_rules! unescape_assert_err { 8 | ($l:expr, $r:expr) => { 9 | assert_eq!(crate::unescape($l).unwrap_err(), $r); 10 | }; 11 | } 12 | 13 | macro_rules! unescape_assert_err_str { 14 | ($s:expr, $e:expr, $e_src:expr) => {{ 15 | let e = crate::unescape($s).unwrap_err(); 16 | 17 | assert_eq!(e.to_string(), $e); 18 | assert_eq!(e.source().unwrap().to_string(), $e_src); 19 | }}; 20 | } 21 | 22 | #[test] 23 | fn error() { 24 | // std 25 | use std::error::Error; 26 | // hack-ink 27 | use crate::Error::*; 28 | 29 | unescape_assert_err!(r"\", IncompleteStr(0)); 30 | unescape_assert_err!(r"\0\", IncompleteStr(2)); 31 | 32 | unescape_assert_err!(r"\{}", InvalidChar { char: '{', pos: 1 }); 33 | unescape_assert_err!(r"\0\{}", InvalidChar { char: '{', pos: 3 }); 34 | 35 | unescape_assert_err_str!( 36 | r"\u{g}", 37 | "parse int error, break at 4", 38 | "invalid digit found in string" 39 | ); 40 | unescape_assert_err_str!( 41 | r"\0\u{g}", 42 | "parse int error, break at 6", 43 | "invalid digit found in string" 44 | ); 45 | } 46 | 47 | #[test] 48 | fn unescape_unicode() { 49 | unescape_assert_eq!(r"\u0000", "\0"); 50 | unescape_assert_eq!(r"\u0009", "\t"); 51 | unescape_assert_eq!(r"\u000a", "\n"); 52 | unescape_assert_eq!(r"\uffff", "\u{ffff}"); 53 | unescape_assert_eq!(r"\u0000XavierJane", "\0XavierJane"); 54 | 55 | unescape_assert_eq!(r"\u{0}", "\0"); 56 | unescape_assert_eq!(r"\u{9}", "\t"); 57 | unescape_assert_eq!(r"\u{a}", "\n"); 58 | unescape_assert_eq!(r"\u{ffff}", "\u{ffff}"); 59 | unescape_assert_eq!(r"\u{1F600}", "\u{1F600}"); 60 | unescape_assert_eq!(r"\u{1F600}", "😀"); 61 | unescape_assert_eq!(r"\u{0}XavierJane", "\0XavierJane"); 62 | } 63 | 64 | #[test] 65 | fn unescape_byte() { 66 | unescape_assert_eq!(r"\x00", "\x00"); 67 | unescape_assert_eq!(r"\x09", "\t"); 68 | unescape_assert_eq!(r"\x0a", "\n"); 69 | unescape_assert_eq!(r"\x7f", "\x7f"); 70 | unescape_assert_eq!(r"\x00XavierJane", "\x00XavierJane"); 71 | } 72 | 73 | #[test] 74 | fn unescape_octal() { 75 | unescape_assert_eq!(r"\0", "\0"); 76 | unescape_assert_eq!(r"\11", "\t"); 77 | unescape_assert_eq!(r"\12", "\n"); 78 | unescape_assert_eq!(r"\377", "\u{00ff}"); 79 | unescape_assert_eq!(r"\0XavierJane", "\0XavierJane"); 80 | } 81 | 82 | #[test] 83 | fn unescape_special_symbols() { 84 | unescape_assert_eq!(r"\b", "\u{0008}"); 85 | unescape_assert_eq!(r"\f", "\u{000c}"); 86 | unescape_assert_eq!(r"\n", "\n"); 87 | unescape_assert_eq!(r"\r", "\r"); 88 | unescape_assert_eq!(r"\t", "\t"); 89 | unescape_assert_eq!(r"\'", "\'"); 90 | unescape_assert_eq!(r#"\""#, "\""); 91 | unescape_assert_eq!(r"\\", "\\"); 92 | unescape_assert_eq!(r"//", "//"); 93 | } 94 | -------------------------------------------------------------------------------- /src/lib.rs: -------------------------------------------------------------------------------- 1 | #![warn(missing_docs)] 2 | 3 | //! Unescape the given string. 4 | //! This is the opposite operation of [`std::ascii::escape_default`]. 5 | 6 | // crates.io 7 | use thiserror::Error as ThisError; 8 | 9 | #[cfg(test)] mod test; 10 | 11 | /// Unescaper's `Result`. 12 | pub type Result = ::std::result::Result; 13 | 14 | /// Unescaper's `Error`. 15 | #[allow(missing_docs)] 16 | #[cfg_attr(test, derive(PartialEq, Eq))] 17 | #[derive(Debug, ThisError)] 18 | pub enum Error { 19 | #[error("incomplete str, break at {0}")] 20 | IncompleteStr(usize), 21 | #[error("invalid char, {char:?} break at {pos}")] 22 | InvalidChar { char: char, pos: usize }, 23 | #[error("parse int error, break at {pos}")] 24 | ParseIntError { source: ::std::num::ParseIntError, pos: usize }, 25 | } 26 | use Error::*; 27 | 28 | /// Unescaper struct which holding the chars cache for unescaping. 29 | #[derive(Debug)] 30 | pub struct Unescaper { 31 | /// [`str`] cache, in reverse order. 32 | pub chars: Vec, 33 | } 34 | impl Unescaper { 35 | /// Build a new [`Unescaper`] from the given [`str`]. 36 | pub fn new(s: &str) -> Self { 37 | Self { chars: s.chars().rev().collect() } 38 | } 39 | 40 | /// Unescape the given [`str`]. 41 | pub fn unescape(&mut self) -> Result { 42 | let chars_count = self.chars.len(); 43 | let offset = |mut e, remaining_count| { 44 | let (IncompleteStr(pos) | InvalidChar { pos, .. } | ParseIntError { pos, .. }) = &mut e; 45 | 46 | *pos += chars_count - remaining_count - 1; 47 | 48 | e 49 | }; 50 | let mut unescaped = String::new(); 51 | 52 | while let Some(c) = self.chars.pop() { 53 | if c != '\\' { 54 | unescaped.push(c); 55 | 56 | continue; 57 | } 58 | 59 | let c = self.chars.pop().ok_or(IncompleteStr(chars_count - self.chars.len() - 1))?; 60 | let c = match c { 61 | 'b' => '\u{0008}', 62 | 'f' => '\u{000c}', 63 | 'n' => '\n', 64 | 'r' => '\r', 65 | 't' => '\t', 66 | // https://github.com/hack-ink/unescaper/pull/10#issuecomment-1676443635 67 | // 68 | // https://www.ecma-international.org/wp-content/uploads/ECMA-404_2nd_edition_december_2017.pdf 69 | // On page 4 it says: "\/ represents the solidus character (U+002F)." 70 | '\'' | '\"' | '\\' | '/' => c, 71 | 'u' => self.unescape_unicode_internal().map_err(|e| offset(e, self.chars.len()))?, 72 | 'x' => self.unescape_byte_internal().map_err(|e| offset(e, self.chars.len()))?, 73 | _ => self.unescape_octal_internal(c).map_err(|e| offset(e, self.chars.len()))?, 74 | }; 75 | 76 | unescaped.push(c); 77 | } 78 | 79 | Ok(unescaped) 80 | } 81 | 82 | // pub fn unescape_unicode(&mut self) -> Result {} 83 | fn unescape_unicode_internal(&mut self) -> Result { 84 | let c = self.chars.pop().ok_or(Error::IncompleteStr(0))?; 85 | let mut unicode = String::new(); 86 | 87 | // \u + { + regex(d*) + } 88 | if c == '{' { 89 | while let Some(n) = self.chars.pop() { 90 | if n == '}' { 91 | break; 92 | } 93 | 94 | unicode.push(n); 95 | } 96 | } 97 | // \u + regex(d{4}) 98 | else { 99 | // [0, 65536), 16^4 100 | unicode.push(c); 101 | 102 | for i in 0..3 { 103 | let c = self.chars.pop().ok_or(IncompleteStr(i))?; 104 | 105 | unicode.push(c); 106 | } 107 | } 108 | 109 | char::from_u32( 110 | u32::from_str_radix(&unicode, 16).map_err(|e| ParseIntError { source: e, pos: 0 })?, 111 | ) 112 | .ok_or(Error::InvalidChar { 113 | char: unicode.chars().last().expect("empty unicode will exit earlier; qed"), 114 | pos: 0, 115 | }) 116 | } 117 | 118 | // pub fn unescape_byte(&mut self) -> Result {} 119 | fn unescape_byte_internal(&mut self) -> Result { 120 | let mut byte = String::new(); 121 | 122 | // [0, 256), 16^2 123 | for i in 0..2 { 124 | let c = self.chars.pop().ok_or(IncompleteStr(i))?; 125 | 126 | byte.push(c); 127 | } 128 | 129 | Ok(u8::from_str_radix(&byte, 16).map_err(|e| ParseIntError { source: e, pos: 0 })? as _) 130 | } 131 | 132 | // pub fn unescape_octal(&mut self) -> Result {} 133 | fn unescape_octal_internal(&mut self, c: char) -> Result { 134 | let mut octal = String::new(); 135 | let mut try_push_next = |octal: &mut String| { 136 | if let Some(c) = 137 | self.chars.last().cloned().filter(|c| c.is_digit(8)).and_then(|_| self.chars.pop()) 138 | { 139 | octal.push(c); 140 | } 141 | }; 142 | 143 | match c { 144 | // decimal [0, 256) == octal [0, 400) 145 | // 0 <= first digit < 4 146 | // \ + regex(d{1,3}) 147 | '0' | '1' | '2' | '3' => { 148 | octal.push(c); 149 | 150 | (0..2).for_each(|_| try_push_next(&mut octal)); 151 | }, 152 | // \ + regex(d{1,2}) 153 | '4' | '5' | '6' | '7' => { 154 | octal.push(c); 155 | 156 | try_push_next(&mut octal); 157 | }, 158 | _ => Err(InvalidChar { char: c, pos: 0 })?, 159 | } 160 | 161 | Ok(u8::from_str_radix(&octal, 8).map_err(|e| ParseIntError { source: e, pos: 0 })? as _) 162 | } 163 | } 164 | 165 | /// Unescape the given [`str`]. 166 | pub fn unescape(s: &str) -> Result { 167 | Unescaper::new(s).unescape() 168 | } 169 | -------------------------------------------------------------------------------- /LICENSE-GPL3: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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No Surrender of Others' Freedom. 541 | 542 | If conditions are imposed on you (whether by court order, agreement or 543 | otherwise) that contradict the conditions of this License, they do not 544 | excuse you from the conditions of this License. If you cannot convey a 545 | covered work so as to satisfy simultaneously your obligations under this 546 | License and any other pertinent obligations, then as a consequence you may 547 | not convey it at all. For example, if you agree to terms that obligate you 548 | to collect a royalty for further conveying from those to whom you convey 549 | the Program, the only way you could satisfy both those terms and this 550 | License would be to refrain entirely from conveying the Program. 551 | 552 | 13. Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | {one line to give the program's name and a brief idea of what it does.} 635 | Copyright (C) {year} {name of author} 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | {project} Copyright (C) {year} {fullname} 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------