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| -rw-r--r-- | third_party/rust/chardetng_c/.cargo-checksum.json | 1 | ||||
| -rw-r--r-- | third_party/rust/chardetng_c/CONTRIBUTING.md | 34 | ||||
| -rw-r--r-- | third_party/rust/chardetng_c/COPYRIGHT | 9 | ||||
| -rw-r--r-- | third_party/rust/chardetng_c/Cargo.toml | 17 | ||||
| -rw-r--r-- | third_party/rust/chardetng_c/LICENSE-APACHE | 202 | ||||
| -rw-r--r-- | third_party/rust/chardetng_c/LICENSE-MIT | 25 | ||||
| -rw-r--r-- | third_party/rust/chardetng_c/README.md | 31 | ||||
| -rw-r--r-- | third_party/rust/chardetng_c/include/chardetng.h | 154 | ||||
| -rw-r--r-- | third_party/rust/chardetng_c/src/lib.rs | 176 |
9 files changed, 649 insertions, 0 deletions
diff --git a/third_party/rust/chardetng_c/.cargo-checksum.json b/third_party/rust/chardetng_c/.cargo-checksum.json new file mode 100644 index 0000000000..cddf36a7ac --- /dev/null +++ b/third_party/rust/chardetng_c/.cargo-checksum.json @@ -0,0 +1 @@ +{"files":{"CONTRIBUTING.md":"5f28b63428b92d27d796d6d926447d15a19232236200e161ec870f4fdda1b489","COPYRIGHT":"5fa6d8c0701e5ce051b72b9ed08e3a75d5aee8e4132d876556c3dc04084238c7","Cargo.toml":"4ae3f82f8c8997b0bdf8830959825ec7e77316bbcec62e42255c07afff2e4479","LICENSE-APACHE":"cfc7749b96f63bd31c3c42b5c471bf756814053e847c10f3eb003417bc523d30","LICENSE-MIT":"3fa4ca83dcc9237839b1bdeb2e6d16bdfb5ec0c5ce42b24694d8bbf0dcbef72c","README.md":"f458dc617c487ace6c60096e1bf3ab1b39c151543b40916717596c28e81deebc","include/chardetng.h":"8a781fcbf6441d063abc6c004d485cb2d5a0b304f3bfe5d5978e70437b7b778e","src/lib.rs":"2eeaf976144bab2c9c819934ca0fce36fe2d9b21236d19b506426733d9a57e2b"},"package":null}
\ No newline at end of file diff --git a/third_party/rust/chardetng_c/CONTRIBUTING.md b/third_party/rust/chardetng_c/CONTRIBUTING.md new file mode 100644 index 0000000000..ca03c5d355 --- /dev/null +++ b/third_party/rust/chardetng_c/CONTRIBUTING.md @@ -0,0 +1,34 @@ +If you send a pull request / patch, please observe the following. + +## Licensing + +Since this crate is dual-licensed, +[section 5 of the Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0#contributions) +is considered to apply in the sense of Contributions being automatically +under the Apache License 2.0 or MIT dual license (see the `COPYRIGHT` file). +That is, by the act of offering a Contribution, you place your Contribution +under the Apache License 2.0 or MIT dual license stated in the `COPYRIGHT` +file. Please do not contribute if you aren't willing or allowed to license your +contributions in this manner. + +You are encouraged to dedicate test code that you contribute to the Public +Domain using the CC0 dedication. If you contribute test code that is not +dedicated to the Public Domain, please be sure not to put it in a part of +source code that the comments designate as being dedicated to the Public +Domain. + +## Copyright Notices + +If you require the addition of your copyright notice, it's up to you to edit in +your notice as part of your Contribution. Not adding a copyright notice is +taken as a waiver of copyright notice. + +## Compatibility with Stable Rust + +Please ensure that your Contribution compiles with the latest stable-channel +rustc. + +## rustfmt + +The `rustfmt` version used for this code is `rustfmt-nightly`. Please either +use that version or avoid using `rustfmt` (so as not to reformat all the code). diff --git a/third_party/rust/chardetng_c/COPYRIGHT b/third_party/rust/chardetng_c/COPYRIGHT new file mode 100644 index 0000000000..e149878112 --- /dev/null +++ b/third_party/rust/chardetng_c/COPYRIGHT @@ -0,0 +1,9 @@ +chardetng_c is copyright Mozilla Foundation. + +Licensed under the Apache License, Version 2.0 +<LICENSE-APACHE or +https://www.apache.org/licenses/LICENSE-2.0> or the MIT +license <LICENSE-MIT or https://opensource.org/licenses/MIT>, +at your option. All files in the project carrying such +notice may not be copied, modified, or distributed except +according to those terms. diff --git a/third_party/rust/chardetng_c/Cargo.toml b/third_party/rust/chardetng_c/Cargo.toml new file mode 100644 index 0000000000..e4fc28c4d5 --- /dev/null +++ b/third_party/rust/chardetng_c/Cargo.toml @@ -0,0 +1,17 @@ +[package] +name = "chardetng_c" +description = "C bindings for chardetng" +version = "0.1.2" +authors = ["Henri Sivonen <hsivonen@hsivonen.fi>"] +edition = "2018" +license = "Apache-2.0 OR MIT" +readme = "README.md" +documentation = "https://docs.rs/chardetng_c/" +homepage = "https://docs.rs/chardetng_c/" +repository = "https://github.com/hsivonen/chardetng-c" +keywords = ["encoding", "web", "unicode", "charset"] +categories = ["text-processing", "encoding", "web-programming", "internationalization"] + +[dependencies] +encoding_rs = "0.8.17" +chardetng = "0.1.1"
\ No newline at end of file diff --git a/third_party/rust/chardetng_c/LICENSE-APACHE b/third_party/rust/chardetng_c/LICENSE-APACHE new file mode 100644 index 0000000000..d645695673 --- /dev/null +++ b/third_party/rust/chardetng_c/LICENSE-APACHE @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. 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IN NO EVENT +SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR +IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE. diff --git a/third_party/rust/chardetng_c/README.md b/third_party/rust/chardetng_c/README.md new file mode 100644 index 0000000000..bba148ceb3 --- /dev/null +++ b/third_party/rust/chardetng_c/README.md @@ -0,0 +1,31 @@ +# chardetng_c + +[](https://crates.io/crates/chardetng_c) +[](https://docs.rs/chardetng_c/) +[](https://github.com/hsivonen/chardetng_c/blob/master/COPYRIGHT) + +A C wrapper for [`chardetng`](https://crates.io/crates/chardetng). + +## Licensing + +Please see the file named +[COPYRIGHT](https://github.com/hsivonen/chardetng_c/blob/master/COPYRIGHT). + +## Documentation + +Generated [API documentation](https://docs.rs/chardetng_c/) is available +online. + +## Release Notes + +### 0.1.2 + +* Remove year from copyright notices. + +### 0.1.1 + +* Add newline to the end of the C header. + +### 0.1.0 + +* Initial release. diff --git a/third_party/rust/chardetng_c/include/chardetng.h b/third_party/rust/chardetng_c/include/chardetng.h new file mode 100644 index 0000000000..b59d05702e --- /dev/null +++ b/third_party/rust/chardetng_c/include/chardetng.h @@ -0,0 +1,154 @@ +// Copyright Mozilla Foundation. See the COPYRIGHT +// file at the top-level directory of this distribution. +// +// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or +// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license +// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +#ifndef chardetng_h +#define chardetng_h + +#ifdef __cplusplus +extern "C" { +#endif + +#include <stdint.h> +#include <stdbool.h> +#include "encoding_rs.h" + +#ifndef CHARDETNG_ENCODING_DETECTOR +#define CHARDETNG_ENCODING_DETECTOR EncodingDetector +#ifndef __cplusplus +typedef struct Detector_ EncodingDetector; +#endif +#endif + +/// Instantiates a Web browser-oriented detector for guessing what +/// character encoding a stream of bytes is encoded in. +/// +/// The bytes are fed to the detector incrementally using the +/// `chardetng_encoding_detector_free` function. The current guess of the +/// detector can be queried using the `chardetng_encoding_detector_guess` +/// function. The guessing parameters are arguments to the +/// `chardetng_encoding_detector_guess` function rather than arguments to the +/// constructor in order to enable the application to check if the arguments +/// affect the guessing outcome. (The specific use case is to disable UI for +/// re-running the detector with UTF-8 allowed and the top-level domain name +/// ignored if those arguments don't change the guess.) +/// +/// The instantiated detector must be freed after use using +/// `chardetng_detectordetector_free`. +CHARDETNG_ENCODING_DETECTOR* chardetng_encoding_detector_new(); + +/// Deallocates a detector obtained from `chardetng_encodingdetector_new`. +void chardetng_encoding_detector_free(CHARDETNG_ENCODING_DETECTOR* detector); + +/// Queries whether the TLD is considered non-generic and could affect the guess. +/// +/// # Undefined Behavior +/// +/// UB ensues if +/// +/// * `tld` is non-NULL and `tld_len` is non-zero but `tld` and `tld_len` +/// don't designate a range of memory valid for reading. +bool chardetng_encoding_detector_tld_may_affect_guess(char const* tld, size_t tld_len); + +/// Inform the detector of a chunk of input. +/// +/// The byte stream is represented as a sequence of calls to this +/// function such that the concatenation of the arguments to this +/// function form the byte stream. It does not matter how the application +/// chooses to chunk the stream. It is OK to call this function with +/// a zero-length byte slice. +/// +/// The end of the stream is indicated by calling this function with +/// `last` set to `true`. In that case, the end of the stream is +/// considered to occur after the last byte of the `buffer` (which +/// may be zero-length) passed in the same call. Once this function +/// has been called with `last` set to `true` this function must not +/// be called again. +/// +/// If you want to perform detection on just the prefix of a longer +/// stream, do not pass `last=true` after the prefix if the stream +/// actually still continues. +/// +/// Returns `true` if after processing `buffer` the stream has +/// contained at least one non-ASCII byte and `false` if only +/// ASCII has been seen so far. +/// +/// # Panics +/// +/// If this function has previously been called with `last` set to `true`. +/// +/// # Undefined Behavior +/// +/// UB ensues if +/// +/// * `detector` does not point to a detector obtained from +/// `chardetng_detector_new` but not yet freed with +/// `chardetng_detector_free`. +/// * `buffer` is `NULL`. (It can be a bogus pointer when `buffer_len` is 0.) +/// * ,buffer_len` is non-zero and `buffer` and `buffer_len` don't designate +/// a range of memory valid for reading. +bool chardetng_encoding_detector_feed( + CHARDETNG_ENCODING_DETECTOR* detector, + uint8_t const* buffer, + size_t buffer_len, + bool last +); + +/// Guess the encoding given the bytes pushed to the detector so far +/// (via `chardetng_encoding_detector_feed()`), the top-level domain name +/// from which the bytes were loaded, and an indication of whether to +/// consider UTF-8 as a permissible guess. +/// +/// The `tld` argument takes the rightmost DNS label of the hostname of the +/// host the stream was loaded from in lower-case ASCII form. That is, if +/// the label is an internationalized top-level domain name, it must be +/// provided in its Punycode form. If the TLD that the stream was loaded +/// from is unavalable, `NULL` may be passed instead (and 0 as `tld_len`), +/// which is equivalent to passing pointer to "com" as `tld` and 3 as +/// `tld_len`. +/// +/// If the `allow_utf8` argument is set to `false`, the return value of +/// this function won't be `UTF_8_ENCODING`. When performing detection +/// on `text/html` on non-`file:` URLs, Web browsers must pass `false`, +/// unless the user has taken a specific contextual action to request an +/// override. This way, Web developers cannot start depending on UTF-8 +/// detection. Such reliance would make the Web Platform more brittle. +/// +/// Returns the guessed encoding (never `NULL`). +/// +/// # Panics +/// +/// If `tld` is `NULL` but `tld_len` is not zero. +/// +/// If `tld` contains non-ASCII, period, or upper-case letters. (The panic +/// condition is intentionally limited to signs of failing to extract the +/// label correctly, failing to provide it in its Punycode form, and failure +/// to lower-case it. Full DNS label validation is intentionally not performed +/// to avoid panics when the reality doesn't match the specs.) +/// +/// # Undefined Behavior +/// +/// UB ensues if +/// +/// * `detector` does not point to a detector obtained from +/// `chardetng_detector_new` but not yet freed with +/// `chardetng_detector_free`. +/// * `tld` is non-NULL and `tld_len` is non-zero but `tld` and `tld_len` +/// don't designate a range of memory valid for reading. +ENCODING_RS_ENCODING const* chardetng_encoding_detector_guess( + CHARDETNG_ENCODING_DETECTOR const* detector, + char const* tld, + size_t tld_len, + bool allow_utf8 +); + +#ifdef __cplusplus +} +#endif + +#endif // chardetng_h diff --git a/third_party/rust/chardetng_c/src/lib.rs b/third_party/rust/chardetng_c/src/lib.rs new file mode 100644 index 0000000000..0ca3383b9e --- /dev/null +++ b/third_party/rust/chardetng_c/src/lib.rs @@ -0,0 +1,176 @@ +// Copyright Mozilla Foundation. See the COPYRIGHT +// file at the top-level directory of this distribution. +// +// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or +// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license +// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +#![doc(html_root_url = "https://docs.rs/chardetng_c/0.1.0")] + +//! C API for [`chardetng`](https://docs.rs/chardetng/) +//! +//! # Panics +//! +//! This crate is designed to be used only in a `panic=abort` scenario. +//! Panic propagation across FFI is not handled! +//! +//! # Licensing +//! +//! See the file named [COPYRIGHT](https://github.com/hsivonen/chardetng_c/blob/master/COPYRIGHT). + +use encoding_rs::Encoding; +use chardetng::EncodingDetector; + +/// Instantiates a Web browser-oriented detector for guessing what +/// character encoding a stream of bytes is encoded in. +/// +/// The bytes are fed to the detector incrementally using the +/// `chardetng_encoding_detector_free` function. The current guess of the +/// detector can be queried using the `chardetng_encoding_detector_guess` +/// function. The guessing parameters are arguments to the +/// `chardetng_encoding_detector_guess` function rather than arguments to the +/// constructor in order to enable the application to check if the arguments +/// affect the guessing outcome. (The specific use case is to disable UI for +/// re-running the detector with UTF-8 allowed and the top-level domain name +/// ignored if those arguments don't change the guess.) +/// +/// The instantiated detector must be freed after use using +/// `chardetng_detectordetector_free`. +#[no_mangle] +pub unsafe extern "C" fn chardetng_encoding_detector_new() -> *mut EncodingDetector { + Box::into_raw(Box::new(EncodingDetector::new())) +} + +/// Deallocates a detector obtained from `chardetng_encodingdetector_new`. +#[no_mangle] +pub unsafe extern "C" fn chardetng_encoding_detector_free(detector: *mut EncodingDetector) { + let _ = Box::from_raw(detector); +} + +/// Queries whether the TLD is considered non-generic and could affect the guess. +/// +/// # Undefined Behavior +/// +/// UB ensues if +/// +/// * `tld` is non-NULL and `tld_len` is non-zero but `tld` and `tld_len` +/// don't designate a range of memory valid for reading. +#[no_mangle] +pub unsafe extern "C" fn chardetng_encoding_detector_tld_may_affect_guess( + tld: *const u8, + tld_len: usize, +) -> bool { + let tld_opt = if tld.is_null() { + assert_eq!(tld_len, 0); + None + } else { + Some(::std::slice::from_raw_parts(tld, tld_len)) + }; + EncodingDetector::tld_may_affect_guess(tld_opt) +} + +/// Inform the detector of a chunk of input. +/// +/// The byte stream is represented as a sequence of calls to this +/// function such that the concatenation of the arguments to this +/// function form the byte stream. It does not matter how the application +/// chooses to chunk the stream. It is OK to call this function with +/// a zero-length byte slice. +/// +/// The end of the stream is indicated by calling this function with +/// `last` set to `true`. In that case, the end of the stream is +/// considered to occur after the last byte of the `buffer` (which +/// may be zero-length) passed in the same call. Once this function +/// has been called with `last` set to `true` this function must not +/// be called again. +/// +/// If you want to perform detection on just the prefix of a longer +/// stream, do not pass `last=true` after the prefix if the stream +/// actually still continues. +/// +/// Returns `true` if after processing `buffer` the stream has +/// contained at least one non-ASCII byte and `false` if only +/// ASCII has been seen so far. +/// +/// # Panics +/// +/// If this function has previously been called with `last` set to `true`. +/// +/// # Undefined Behavior +/// +/// UB ensues if +/// +/// * `detector` does not point to a detector obtained from +/// `chardetng_detector_new` but not yet freed with +/// `chardetng_detector_free`. +/// * `buffer` is `NULL`. (It can be a bogus pointer when `buffer_len` is 0.) +/// * ,buffer_len` is non-zero and `buffer` and `buffer_len` don't designate +/// a range of memory valid for reading. +#[no_mangle] +pub unsafe extern "C" fn chardetng_encoding_detector_feed( + detector: *mut EncodingDetector, + buffer: *const u8, + buffer_len: usize, + last: bool, +) -> bool { + (*detector).feed(::std::slice::from_raw_parts(buffer, buffer_len), last) +} + +/// Guess the encoding given the bytes pushed to the detector so far +/// (via `chardetng_encoding_detector_feed()`), the top-level domain name +/// from which the bytes were loaded, and an indication of whether to +/// consider UTF-8 as a permissible guess. +/// +/// The `tld` argument takes the rightmost DNS label of the hostname of the +/// host the stream was loaded from in lower-case ASCII form. That is, if +/// the label is an internationalized top-level domain name, it must be +/// provided in its Punycode form. If the TLD that the stream was loaded +/// from is unavalable, `NULL` may be passed instead (and 0 as `tld_len`), +/// which is equivalent to passing pointer to "com" as `tld` and 3 as +/// `tld_len`. +/// +/// If the `allow_utf8` argument is set to `false`, the return value of +/// this function won't be `UTF_8_ENCODING`. When performing detection +/// on `text/html` on non-`file:` URLs, Web browsers must pass `false`, +/// unless the user has taken a specific contextual action to request an +/// override. This way, Web developers cannot start depending on UTF-8 +/// detection. Such reliance would make the Web Platform more brittle. +/// +/// Returns the guessed encoding (never `NULL`). +/// +/// # Panics +/// +/// If `tld` is `NULL` but `tld_len` is not zero. +/// +/// If `tld` contains non-ASCII, period, or upper-case letters. (The panic +/// condition is intentionally limited to signs of failing to extract the +/// label correctly, failing to provide it in its Punycode form, and failure +/// to lower-case it. Full DNS label validation is intentionally not performed +/// to avoid panics when the reality doesn't match the specs.) +/// +/// # Undefined Behavior +/// +/// UB ensues if +/// +/// * `detector` does not point to a detector obtained from +/// `chardetng_detector_new` but not yet freed with +/// `chardetng_detector_free`. +/// * `tld` is non-NULL and `tld_len` is non-zero but `tld` and `tld_len` +/// don't designate a range of memory valid for reading. +#[no_mangle] +pub unsafe extern "C" fn chardetng_encoding_detector_guess( + detector: *const EncodingDetector, + tld: *const u8, + tld_len: usize, + allow_utf8: bool, +) -> *const Encoding { + let tld_opt = if tld.is_null() { + assert_eq!(tld_len, 0); + None + } else { + Some(::std::slice::from_raw_parts(tld, tld_len)) + }; + (*detector).guess(tld_opt, allow_utf8) +} |