Initial import of Hex 0.4.3
Bug: 239413416
Test: repo sync
Change-Id: I5c10d0e3629dd8a9eb42bebfbd619c6de697e611
diff --git a/.cargo_vcs_info.json b/.cargo_vcs_info.json
new file mode 100644
index 0000000..29545f9
--- /dev/null
+++ b/.cargo_vcs_info.json
@@ -0,0 +1,5 @@
+{
+ "git": {
+ "sha1": "b2b4370b5bf021b98ee7adc92233e8de3f2de792"
+ }
+}
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
new file mode 100644
index 0000000..523dce5
--- /dev/null
+++ b/.github/workflows/rust.yml
@@ -0,0 +1,32 @@
+name: Test hex
+on: [push, pull_request]
+
+env:
+ RUST_BACKTRACE: '1'
+ RUSTFLAGS: -D warnings
+
+jobs:
+ test:
+ runs-on: ${{ matrix.os }}
+ strategy:
+ # We want the tests to run on all configurations, even if jobs (like on nightly), fail.
+ fail-fast: false
+ matrix:
+ os: [ubuntu-latest, windows-latest, macos-latest]
+ rust: [stable, beta, nightly]
+
+ steps:
+ - uses: actions/checkout@v2
+ - uses: hecrj/setup-rust-action@v1
+ with:
+ rust-version: ${{ matrix.rust }}
+ - name: Build
+ run: cargo build --verbose
+ - name: Run tests
+ run: cargo test --verbose
+ - name: Run tests [no-default-features]
+ run: cargo test --verbose --no-default-features
+ - name: Run tests [serde]
+ run: cargo test --verbose --features serde
+ - name: Validate benches still work
+ run: cargo bench --all -- --test
diff --git a/Android.bp b/Android.bp
new file mode 100644
index 0000000..6c5b0c9
--- /dev/null
+++ b/Android.bp
@@ -0,0 +1,23 @@
+// This file is generated by cargo2android.py --config cargo2android.json.
+// Do not modify this file as changes will be overridden on upgrade.
+
+
+
+rust_library {
+ name: "libhex",
+ host_supported: true,
+ crate_name: "hex",
+ cargo_env_compat: true,
+ cargo_pkg_version: "0.4.3",
+ srcs: ["src/lib.rs"],
+ edition: "2018",
+ features: [
+ "alloc",
+ "default",
+ "std",
+ ],
+ apex_available: [
+ "//apex_available:platform",
+ "//apex_available:anyapex",
+ ],
+}
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..fab04a8
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,63 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies
+#
+# If you believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+edition = "2018"
+name = "hex"
+version = "0.4.3"
+authors = ["KokaKiwi <kokakiwi@kokakiwi.net>"]
+description = "Encoding and decoding data into/from hexadecimal representation."
+documentation = "https://docs.rs/hex/"
+readme = "README.md"
+keywords = ["no_std", "hex"]
+categories = ["encoding", "no-std"]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/KokaKiwi/rust-hex"
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[[bench]]
+name = "hex"
+harness = false
+[dependencies.serde]
+version = "1.0"
+optional = true
+default-features = false
+[dev-dependencies.criterion]
+version = "0.3"
+
+[dev-dependencies.faster-hex]
+version = "0.5"
+
+[dev-dependencies.pretty_assertions]
+version = "0.6"
+
+[dev-dependencies.rustc-hex]
+version = "2.1"
+
+[dev-dependencies.serde]
+version = "1.0"
+features = ["derive"]
+
+[dev-dependencies.serde_json]
+version = "1.0"
+
+[dev-dependencies.version-sync]
+version = "0.9"
+
+[features]
+alloc = []
+default = ["std"]
+std = ["alloc"]
+[badges.maintenance]
+status = "actively-developed"
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
new file mode 100644
index 0000000..b25d8dd
--- /dev/null
+++ b/Cargo.toml.orig
@@ -0,0 +1,40 @@
+[package]
+name = "hex"
+version = "0.4.3"
+authors = ["KokaKiwi <kokakiwi@kokakiwi.net>"]
+description = "Encoding and decoding data into/from hexadecimal representation."
+license = "MIT OR Apache-2.0"
+documentation = "https://docs.rs/hex/"
+repository = "https://github.com/KokaKiwi/rust-hex"
+edition = "2018"
+readme = "README.md"
+keywords = ["no_std", "hex"]
+categories = ["encoding", "no-std"]
+
+[badges]
+maintenance = { status = "actively-developed" }
+
+[features]
+default = ["std"]
+alloc = []
+std = ["alloc"]
+
+[[bench]]
+name = "hex"
+harness = false
+
+[dependencies]
+serde = { version = "1.0", default-features = false, optional = true }
+
+[dev-dependencies]
+criterion = "0.3"
+rustc-hex = "2.1"
+faster-hex = "0.5"
+version-sync = "0.9"
+pretty_assertions = "0.6"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..03113a0
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,222 @@
+Copyright (c) 2013-2014 The Rust Project Developers.
+Copyright (c) 2015-2020 The rust-hex Developers
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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.
+
+ 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. For the purposes of this definition,
+ "control" means (i) the power, direct or indirect, to cause the
+ direction or management of such entity, whether by contract or
+ otherwise, or (ii) ownership of fifty percent (50%) or more of the
+ outstanding shares, or (iii) beneficial ownership of such entity.
+
+ "You" (or "Your") shall mean an individual or Legal Entity
+ exercising permissions granted by this License.
+
+ "Source" form shall mean the preferred form for making modifications,
+ including but not limited to software source code, documentation
+ source, and configuration files.
+
+ "Object" form shall mean any form resulting from mechanical
+ transformation or translation of a Source form, including but
+ not limited to compiled object code, generated documentation,
+ and conversions to other media types.
+
+ "Work" shall mean the work of authorship, whether in Source or
+ Object form, made available under the License, as indicated by a
+ copyright notice that is included in or attached to the work
+ (an example is provided in the Appendix below).
+
+ "Derivative Works" shall mean any work, whether in Source or Object
+ form, that is based on (or derived from) the Work and for which the
+ editorial revisions, annotations, elaborations, or other modifications
+ represent, as a whole, an original work of authorship. For the purposes
+ of this License, Derivative Works shall not include works that remain
+ separable from, or merely link (or bind by name) to the interfaces of,
+ the Work and Derivative Works thereof.
+
+ "Contribution" shall mean any work of authorship, including
+ the original version of the Work and any modifications or additions
+ to that Work or Derivative Works thereof, that is intentionally
+ submitted to Licensor for inclusion in the Work by the copyright owner
+ or by an individual or Legal Entity authorized to submit on behalf of
+ the copyright owner. For the purposes of this definition, "submitted"
+ means any form of electronic, verbal, or written communication sent
+ to the Licensor or its representatives, including but not limited to
+ communication on electronic mailing lists, source code control systems,
+ and issue tracking systems that are managed by, or on behalf of, the
+ Licensor for the purpose of discussing and improving the Work, but
+ excluding communication that is conspicuously marked or otherwise
+ designated in writing by the copyright owner as "Not a Contribution."
+
+ "Contributor" shall mean Licensor and any individual or Legal Entity
+ on behalf of whom a Contribution has been received by Licensor and
+ subsequently incorporated within the Work.
+
+ 2. Grant of Copyright License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ copyright license to reproduce, prepare Derivative Works of,
+ publicly display, publicly perform, sublicense, and distribute the
+ Work and such Derivative Works in Source or Object form.
+
+ 3. Grant of Patent License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ (except as stated in this section) patent license to make, have made,
+ use, offer to sell, sell, import, and otherwise transfer the Work,
+ where such license applies only to those patent claims licensable
+ by such Contributor that are necessarily infringed by their
+ Contribution(s) alone or by combination of their Contribution(s)
+ with the Work to which such Contribution(s) was submitted. If You
+ institute patent litigation against any entity (including a
+ cross-claim or counterclaim in a lawsuit) alleging that the Work
+ or a Contribution incorporated within the Work constitutes direct
+ or contributory patent infringement, then any patent licenses
+ granted to You under this License for that Work shall terminate
+ as of the date such litigation is filed.
+
+ 4. Redistribution. You may reproduce and distribute copies of the
+ Work or Derivative Works thereof in any medium, with or without
+ modifications, and in Source or Object form, provided that You
+ meet the following conditions:
+
+ (a) You must give any other recipients of the Work or
+ Derivative Works a copy of this License; and
+
+ (b) You must cause any modified files to carry prominent notices
+ stating that You changed the files; and
+
+ (c) You must retain, in the Source form of any Derivative Works
+ that You distribute, all copyright, patent, trademark, and
+ attribution notices from the Source form of the Work,
+ excluding those notices that do not pertain to any part of
+ the Derivative Works; and
+
+ (d) If the Work includes a "NOTICE" text file as part of its
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+ of the following places: within a NOTICE text file distributed
+ as part of the Derivative Works; within the Source form or
+ documentation, if provided along with the Derivative Works; or,
+ within a display generated by the Derivative Works, if and
+ wherever such third-party notices normally appear. The contents
+ of the NOTICE file are for informational purposes only and
+ do not modify the License. You may add Your own attribution
+ notices within Derivative Works that You distribute, alongside
+ or as an addendum to the NOTICE text from the Work, provided
+ that such additional attribution notices cannot be construed
+ as modifying the License.
+
+ You may add Your own copyright statement to Your modifications and
+ may provide additional or different license terms and conditions
+ for use, reproduction, or distribution of Your modifications, or
+ for any such Derivative Works as a whole, provided Your use,
+ reproduction, and distribution of the Work otherwise complies with
+ the conditions stated in this License.
+
+ 5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
+
+ 6. Trademarks. This License does not grant permission to use the trade
+ names, trademarks, service marks, or product names of the Licensor,
+ except as required for reasonable and customary use in describing the
+ origin of the Work and reproducing the content of the NOTICE file.
+
+ 7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
+ Contributor provides its Contributions) on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ implied, including, without limitation, any warranties or conditions
+ of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+ PARTICULAR PURPOSE. You are solely responsible for determining the
+ appropriateness of using or redistributing the Work and assume any
+ risks associated with Your exercise of permissions under this License.
+
+ 8. Limitation of Liability. In no event and under no legal theory,
+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
+ liable to You for damages, including any direct, indirect, special,
+ incidental, or consequential damages of any character arising as a
+ result of this License or out of the use or inability to use the
+ Work (including but not limited to damages for loss of goodwill,
+ work stoppage, computer failure or malfunction, or any and all
+ other commercial damages or losses), even if such Contributor
+ has been advised of the possibility of such damages.
+
+ 9. Accepting Warranty or Additional Liability. While redistributing
+ the Work or Derivative Works thereof, You may choose to offer,
+ and charge a fee for, acceptance of support, warranty, indemnity,
+ or other liability obligations and/or rights consistent with this
+ License. However, in accepting such obligations, You may act only
+ on Your own behalf and on Your sole responsibility, not on behalf
+ of any other Contributor, and only if You agree to indemnify,
+ defend, and hold each Contributor harmless for any liability
+ incurred by, or claims asserted against, such Contributor by reason
+ of your accepting any such warranty or additional liability.
+
+ END OF TERMS AND CONDITIONS
+
+ APPENDIX: How to apply the Apache License to your work.
+
+ To apply the Apache License to your work, attach the following
+ boilerplate notice, with the fields enclosed by brackets "{}"
+ replaced with your own identifying information. (Don't include
+ the brackets!) The text should be enclosed in the appropriate
+ comment syntax for the file format. We also recommend that a
+ file or class name and description of purpose be included on the
+ same "printed page" as the copyright notice for easier
+ identification within third-party archives.
+
+ Copyright {yyyy} {name of copyright owner}
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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diff --git a/LICENSE-APACHE b/LICENSE-APACHE
new file mode 100644
index 0000000..8f71f43
--- /dev/null
+++ b/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. For the purposes of this definition,
+ "control" means (i) the power, direct or indirect, to cause the
+ direction or management of such entity, whether by contract or
+ otherwise, or (ii) ownership of fifty percent (50%) or more of the
+ outstanding shares, or (iii) beneficial ownership of such entity.
+
+ "You" (or "Your") shall mean an individual or Legal Entity
+ exercising permissions granted by this License.
+
+ "Source" form shall mean the preferred form for making modifications,
+ including but not limited to software source code, documentation
+ source, and configuration files.
+
+ "Object" form shall mean any form resulting from mechanical
+ transformation or translation of a Source form, including but
+ not limited to compiled object code, generated documentation,
+ and conversions to other media types.
+
+ "Work" shall mean the work of authorship, whether in Source or
+ Object form, made available under the License, as indicated by a
+ copyright notice that is included in or attached to the work
+ (an example is provided in the Appendix below).
+
+ "Derivative Works" shall mean any work, whether in Source or Object
+ form, that is based on (or derived from) the Work and for which the
+ editorial revisions, annotations, elaborations, or other modifications
+ represent, as a whole, an original work of authorship. For the purposes
+ of this License, Derivative Works shall not include works that remain
+ separable from, or merely link (or bind by name) to the interfaces of,
+ the Work and Derivative Works thereof.
+
+ "Contribution" shall mean any work of authorship, including
+ the original version of the Work and any modifications or additions
+ to that Work or Derivative Works thereof, that is intentionally
+ submitted to Licensor for inclusion in the Work by the copyright owner
+ or by an individual or Legal Entity authorized to submit on behalf of
+ the copyright owner. For the purposes of this definition, "submitted"
+ means any form of electronic, verbal, or written communication sent
+ to the Licensor or its representatives, including but not limited to
+ communication on electronic mailing lists, source code control systems,
+ and issue tracking systems that are managed by, or on behalf of, the
+ Licensor for the purpose of discussing and improving the Work, but
+ excluding communication that is conspicuously marked or otherwise
+ designated in writing by the copyright owner as "Not a Contribution."
+
+ "Contributor" shall mean Licensor and any individual or Legal Entity
+ on behalf of whom a Contribution has been received by Licensor and
+ subsequently incorporated within the Work.
+
+ 2. Grant of Copyright License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ copyright license to reproduce, prepare Derivative Works of,
+ publicly display, publicly perform, sublicense, and distribute the
+ Work and such Derivative Works in Source or Object form.
+
+ 3. Grant of Patent License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ (except as stated in this section) patent license to make, have made,
+ use, offer to sell, sell, import, and otherwise transfer the Work,
+ where such license applies only to those patent claims licensable
+ by such Contributor that are necessarily infringed by their
+ Contribution(s) alone or by combination of their Contribution(s)
+ with the Work to which such Contribution(s) was submitted. If You
+ institute patent litigation against any entity (including a
+ cross-claim or counterclaim in a lawsuit) alleging that the Work
+ or a Contribution incorporated within the Work constitutes direct
+ or contributory patent infringement, then any patent licenses
+ granted to You under this License for that Work shall terminate
+ as of the date such litigation is filed.
+
+ 4. Redistribution. You may reproduce and distribute copies of the
+ Work or Derivative Works thereof in any medium, with or without
+ modifications, and in Source or Object form, provided that You
+ meet the following conditions:
+
+ (a) You must give any other recipients of the Work or
+ Derivative Works a copy of this License; and
+
+ (b) You must cause any modified files to carry prominent notices
+ stating that You changed the files; and
+
+ (c) You must retain, in the Source form of any Derivative Works
+ that You distribute, all copyright, patent, trademark, and
+ attribution notices from the Source form of the Work,
+ excluding those notices that do not pertain to any part of
+ the Derivative Works; and
+
+ (d) If the Work includes a "NOTICE" text file as part of its
+ distribution, then any Derivative Works that You distribute must
+ include a readable copy of the attribution notices contained
+ within such NOTICE file, excluding those notices that do not
+ pertain to any part of the Derivative Works, in at least one
+ of the following places: within a NOTICE text file distributed
+ as part of the Derivative Works; within the Source form or
+ documentation, if provided along with the Derivative Works; or,
+ within a display generated by the Derivative Works, if and
+ wherever such third-party notices normally appear. The contents
+ of the NOTICE file are for informational purposes only and
+ do not modify the License. You may add Your own attribution
+ notices within Derivative Works that You distribute, alongside
+ or as an addendum to the NOTICE text from the Work, provided
+ that such additional attribution notices cannot be construed
+ as modifying the License.
+
+ You may add Your own copyright statement to Your modifications and
+ may provide additional or different license terms and conditions
+ for use, reproduction, or distribution of Your modifications, or
+ for any such Derivative Works as a whole, provided Your use,
+ reproduction, and distribution of the Work otherwise complies with
+ the conditions stated in this License.
+
+ 5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
+
+ 6. Trademarks. This License does not grant permission to use the trade
+ names, trademarks, service marks, or product names of the Licensor,
+ except as required for reasonable and customary use in describing the
+ origin of the Work and reproducing the content of the NOTICE file.
+
+ 7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
+ Contributor provides its Contributions) on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ implied, including, without limitation, any warranties or conditions
+ of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+ PARTICULAR PURPOSE. You are solely responsible for determining the
+ appropriateness of using or redistributing the Work and assume any
+ risks associated with Your exercise of permissions under this License.
+
+ 8. Limitation of Liability. In no event and under no legal theory,
+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
+ liable to You for damages, including any direct, indirect, special,
+ incidental, or consequential damages of any character arising as a
+ result of this License or out of the use or inability to use the
+ Work (including but not limited to damages for loss of goodwill,
+ work stoppage, computer failure or malfunction, or any and all
+ other commercial damages or losses), even if such Contributor
+ has been advised of the possibility of such damages.
+
+ 9. Accepting Warranty or Additional Liability. While redistributing
+ the Work or Derivative Works thereof, You may choose to offer,
+ and charge a fee for, acceptance of support, warranty, indemnity,
+ or other liability obligations and/or rights consistent with this
+ License. However, in accepting such obligations, You may act only
+ on Your own behalf and on Your sole responsibility, not on behalf
+ of any other Contributor, and only if You agree to indemnify,
+ defend, and hold each Contributor harmless for any liability
+ incurred by, or claims asserted against, such Contributor by reason
+ of your accepting any such warranty or additional liability.
+
+ END OF TERMS AND CONDITIONS
+
+ APPENDIX: How to apply the Apache License to your work.
+
+ To apply the Apache License to your work, attach the following
+ boilerplate notice, with the fields enclosed by brackets "{}"
+ replaced with your own identifying information. (Don't include
+ the brackets!) The text should be enclosed in the appropriate
+ comment syntax for the file format. We also recommend that a
+ file or class name and description of purpose be included on the
+ same "printed page" as the copyright notice for easier
+ identification within third-party archives.
+
+ Copyright {yyyy} {name of copyright owner}
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
diff --git a/LICENSE-MIT b/LICENSE-MIT
new file mode 100644
index 0000000..a7b461f
--- /dev/null
+++ b/LICENSE-MIT
@@ -0,0 +1,20 @@
+Copyright (c) 2013-2014 The Rust Project Developers.
+Copyright (c) 2015-2020 The rust-hex Developers
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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/METADATA b/METADATA
new file mode 100644
index 0000000..ce49ec1
--- /dev/null
+++ b/METADATA
@@ -0,0 +1,20 @@
+name: "hex"
+description: "Encoding and decoding data into/from hexadecimal representation."
+third_party {
+ url {
+ type: HOMEPAGE
+ value: "https://crates.io/crates/hex"
+ }
+ url {
+ type: ARCHIVE
+ value: "https://static.crates.io/crates/hex/hex-0.4.3.crate"
+ }
+ version: "0.4.3"
+ # Dual-licensed, using the least restrictive per go/thirdpartylicenses#same.
+ license_type: NOTICE
+ last_upgrade_date {
+ year: 2022
+ month: 10
+ day: 11
+ }
+}
diff --git a/MODULE_LICENSE_APACHE2 b/MODULE_LICENSE_APACHE2
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/MODULE_LICENSE_APACHE2
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..45dc4dd
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1 @@
+include platform/prebuilts/rust:master:/OWNERS
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..5dfd4b2
--- /dev/null
+++ b/README.md
@@ -0,0 +1,69 @@
+# hex
+
+[](https://crates.io/crates/hex)
+[](https://docs.rs/hex)
+[](https://github.com/KokaKiwi/rust-hex/actions)
+
+Encoding and decoding data into/from hexadecimal representation.
+
+## Examples
+
+Encoding a `String`
+
+```rust
+let hex_string = hex::encode("Hello world!");
+
+println!("{}", hex_string); // Prints "48656c6c6f20776f726c6421"
+```
+
+Decoding a `String`
+
+```rust
+let decoded_string = hex::decode("48656c6c6f20776f726c6421");
+
+println!("{}", decoded_string); // Prints "Hello world!"
+```
+
+You can find the [documentation](https://docs.rs/hex) here.
+
+## Installation
+
+In order to use this crate, you have to add it under `[dependencies]` to your `Cargo.toml`
+
+```toml
+[dependencies]
+hex = "0.4"
+```
+
+By default this will import `std`, if you are working in a
+[`no_std`](https://rust-embedded.github.io/book/intro/no-std.html)
+environment you can turn this off by adding the following
+
+```toml
+[dependencies]
+hex = { version = "0.4", default-features = false }
+```
+
+## Features
+
+- `std`:
+ Enabled by default. Add support for Rust's libstd types.
+- `serde`:
+ Disabled by default. Add support for `serde` de/serializing library.
+ See the `serde` module documentation for usage.
+
+## License
+
+Licensed under either of
+
+- Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
+- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally
+submitted for inclusion in the work by you, as defined in the Apache-2.0
+license, shall be dual licensed as above, without any additional terms or
+conditions.
diff --git a/benches/hex.rs b/benches/hex.rs
new file mode 100644
index 0000000..6435032
--- /dev/null
+++ b/benches/hex.rs
@@ -0,0 +1,61 @@
+use criterion::{criterion_group, criterion_main, Criterion};
+use rustc_hex::{FromHex, ToHex};
+
+const DATA: &[u8] = include_bytes!("../src/lib.rs");
+
+fn bench_encode(c: &mut Criterion) {
+ c.bench_function("hex_encode", |b| b.iter(|| hex::encode(DATA)));
+
+ c.bench_function("rustc_hex_encode", |b| b.iter(|| DATA.to_hex::<String>()));
+
+ c.bench_function("faster_hex_encode", |b| {
+ b.iter(|| faster_hex::hex_string(DATA).unwrap())
+ });
+
+ c.bench_function("faster_hex_encode_fallback", |b| {
+ b.iter(|| {
+ let mut dst = vec![0; DATA.len() * 2];
+ faster_hex::hex_encode_fallback(DATA, &mut dst);
+ dst
+ })
+ });
+}
+
+fn bench_decode(c: &mut Criterion) {
+ c.bench_function("hex_decode", |b| {
+ let hex = hex::encode(DATA);
+ b.iter(|| hex::decode(&hex).unwrap())
+ });
+
+ c.bench_function("rustc_hex_decode", |b| {
+ let hex = DATA.to_hex::<String>();
+ b.iter(|| hex.from_hex::<Vec<u8>>().unwrap())
+ });
+
+ c.bench_function("faster_hex_decode", move |b| {
+ let hex = faster_hex::hex_string(DATA).unwrap();
+ let len = DATA.len();
+ let mut dst = vec![0; len];
+
+ b.iter(|| faster_hex::hex_decode(hex.as_bytes(), &mut dst).unwrap())
+ });
+
+ c.bench_function("faster_hex_decode_unchecked", |b| {
+ let hex = faster_hex::hex_string(DATA).unwrap();
+ let len = DATA.len();
+ let mut dst = vec![0; len];
+
+ b.iter(|| faster_hex::hex_decode_unchecked(hex.as_bytes(), &mut dst))
+ });
+
+ c.bench_function("faster_hex_decode_fallback", |b| {
+ let hex = faster_hex::hex_string(DATA).unwrap();
+ let len = DATA.len();
+ let mut dst = vec![0; len];
+
+ b.iter(|| faster_hex::hex_decode_fallback(hex.as_bytes(), &mut dst))
+ });
+}
+
+criterion_group!(benches, bench_encode, bench_decode);
+criterion_main!(benches);
diff --git a/cargo2android.json b/cargo2android.json
new file mode 100644
index 0000000..6e26a5a
--- /dev/null
+++ b/cargo2android.json
@@ -0,0 +1,4 @@
+{
+ "device": true,
+ "run": true
+}
diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 0000000..ff7a3b5
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,59 @@
+use core::fmt;
+
+/// The error type for decoding a hex string into `Vec<u8>` or `[u8; N]`.
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub enum FromHexError {
+ /// An invalid character was found. Valid ones are: `0...9`, `a...f`
+ /// or `A...F`.
+ InvalidHexCharacter { c: char, index: usize },
+
+ /// A hex string's length needs to be even, as two digits correspond to
+ /// one byte.
+ OddLength,
+
+ /// If the hex string is decoded into a fixed sized container, such as an
+ /// array, the hex string's length * 2 has to match the container's
+ /// length.
+ InvalidStringLength,
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for FromHexError {}
+
+impl fmt::Display for FromHexError {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ match *self {
+ FromHexError::InvalidHexCharacter { c, index } => {
+ write!(f, "Invalid character {:?} at position {}", c, index)
+ }
+ FromHexError::OddLength => write!(f, "Odd number of digits"),
+ FromHexError::InvalidStringLength => write!(f, "Invalid string length"),
+ }
+ }
+}
+
+#[cfg(test)]
+// this feature flag is here to suppress unused
+// warnings of `super::*` and `pretty_assertions::assert_eq`
+#[cfg(feature = "alloc")]
+mod tests {
+ use super::*;
+ #[cfg(feature = "alloc")]
+ use alloc::string::ToString;
+ use pretty_assertions::assert_eq;
+
+ #[test]
+ #[cfg(feature = "alloc")]
+ fn test_display() {
+ assert_eq!(
+ FromHexError::InvalidHexCharacter { c: '\n', index: 5 }.to_string(),
+ "Invalid character '\\n' at position 5"
+ );
+
+ assert_eq!(FromHexError::OddLength.to_string(), "Odd number of digits");
+ assert_eq!(
+ FromHexError::InvalidStringLength.to_string(),
+ "Invalid string length"
+ );
+ }
+}
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..ec48961
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,525 @@
+// Copyright (c) 2013-2014 The Rust Project Developers.
+// Copyright (c) 2015-2020 The rust-hex Developers.
+//
+// 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.
+//! Encoding and decoding hex strings.
+//!
+//! For most cases, you can simply use the [`decode`], [`encode`] and
+//! [`encode_upper`] functions. If you need a bit more control, use the traits
+//! [`ToHex`] and [`FromHex`] instead.
+//!
+//! # Example
+//!
+//! ```
+//! # #[cfg(not(feature = "alloc"))]
+//! # let mut output = [0; 0x18];
+//! #
+//! # #[cfg(not(feature = "alloc"))]
+//! # hex::encode_to_slice(b"Hello world!", &mut output).unwrap();
+//! #
+//! # #[cfg(not(feature = "alloc"))]
+//! # let hex_string = ::core::str::from_utf8(&output).unwrap();
+//! #
+//! # #[cfg(feature = "alloc")]
+//! let hex_string = hex::encode("Hello world!");
+//!
+//! println!("{}", hex_string); // Prints "48656c6c6f20776f726c6421"
+//!
+//! # assert_eq!(hex_string, "48656c6c6f20776f726c6421");
+//! ```
+
+#![doc(html_root_url = "https://docs.rs/hex/0.4.3")]
+#![cfg_attr(not(feature = "std"), no_std)]
+#![cfg_attr(docsrs, feature(doc_cfg))]
+#![allow(clippy::unreadable_literal)]
+
+#[cfg(feature = "alloc")]
+extern crate alloc;
+#[cfg(feature = "alloc")]
+use alloc::{string::String, vec::Vec};
+
+use core::iter;
+
+mod error;
+pub use crate::error::FromHexError;
+
+#[cfg(feature = "serde")]
+#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
+pub mod serde;
+#[cfg(feature = "serde")]
+pub use crate::serde::deserialize;
+#[cfg(all(feature = "alloc", feature = "serde"))]
+pub use crate::serde::{serialize, serialize_upper};
+
+/// Encoding values as hex string.
+///
+/// This trait is implemented for all `T` which implement `AsRef<[u8]>`. This
+/// includes `String`, `str`, `Vec<u8>` and `[u8]`.
+///
+/// # Example
+///
+/// ```
+/// use hex::ToHex;
+///
+/// println!("{}", "Hello world!".encode_hex::<String>());
+/// # assert_eq!("Hello world!".encode_hex::<String>(), "48656c6c6f20776f726c6421".to_string());
+/// ```
+///
+/// *Note*: instead of using this trait, you might want to use [`encode()`].
+pub trait ToHex {
+ /// Encode the hex strict representing `self` into the result. Lower case
+ /// letters are used (e.g. `f9b4ca`)
+ fn encode_hex<T: iter::FromIterator<char>>(&self) -> T;
+
+ /// Encode the hex strict representing `self` into the result. Upper case
+ /// letters are used (e.g. `F9B4CA`)
+ fn encode_hex_upper<T: iter::FromIterator<char>>(&self) -> T;
+}
+
+const HEX_CHARS_LOWER: &[u8; 16] = b"0123456789abcdef";
+const HEX_CHARS_UPPER: &[u8; 16] = b"0123456789ABCDEF";
+
+struct BytesToHexChars<'a> {
+ inner: ::core::slice::Iter<'a, u8>,
+ table: &'static [u8; 16],
+ next: Option<char>,
+}
+
+impl<'a> BytesToHexChars<'a> {
+ fn new(inner: &'a [u8], table: &'static [u8; 16]) -> BytesToHexChars<'a> {
+ BytesToHexChars {
+ inner: inner.iter(),
+ table,
+ next: None,
+ }
+ }
+}
+
+impl<'a> Iterator for BytesToHexChars<'a> {
+ type Item = char;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ match self.next.take() {
+ Some(current) => Some(current),
+ None => self.inner.next().map(|byte| {
+ let current = self.table[(byte >> 4) as usize] as char;
+ self.next = Some(self.table[(byte & 0x0F) as usize] as char);
+ current
+ }),
+ }
+ }
+
+ fn size_hint(&self) -> (usize, Option<usize>) {
+ let length = self.len();
+ (length, Some(length))
+ }
+}
+
+impl<'a> iter::ExactSizeIterator for BytesToHexChars<'a> {
+ fn len(&self) -> usize {
+ let mut length = self.inner.len() * 2;
+ if self.next.is_some() {
+ length += 1;
+ }
+ length
+ }
+}
+
+#[inline]
+fn encode_to_iter<T: iter::FromIterator<char>>(table: &'static [u8; 16], source: &[u8]) -> T {
+ BytesToHexChars::new(source, table).collect()
+}
+
+impl<T: AsRef<[u8]>> ToHex for T {
+ fn encode_hex<U: iter::FromIterator<char>>(&self) -> U {
+ encode_to_iter(HEX_CHARS_LOWER, self.as_ref())
+ }
+
+ fn encode_hex_upper<U: iter::FromIterator<char>>(&self) -> U {
+ encode_to_iter(HEX_CHARS_UPPER, self.as_ref())
+ }
+}
+
+/// Types that can be decoded from a hex string.
+///
+/// This trait is implemented for `Vec<u8>` and small `u8`-arrays.
+///
+/// # Example
+///
+/// ```
+/// use core::str;
+/// use hex::FromHex;
+///
+/// let buffer = <[u8; 12]>::from_hex("48656c6c6f20776f726c6421")?;
+/// let string = str::from_utf8(&buffer).expect("invalid buffer length");
+///
+/// println!("{}", string); // prints "Hello world!"
+/// # assert_eq!("Hello world!", string);
+/// # Ok::<(), hex::FromHexError>(())
+/// ```
+pub trait FromHex: Sized {
+ type Error;
+
+ /// Creates an instance of type `Self` from the given hex string, or fails
+ /// with a custom error type.
+ ///
+ /// Both, upper and lower case characters are valid and can even be
+ /// mixed (e.g. `f9b4ca`, `F9B4CA` and `f9B4Ca` are all valid strings).
+ fn from_hex<T: AsRef<[u8]>>(hex: T) -> Result<Self, Self::Error>;
+}
+
+fn val(c: u8, idx: usize) -> Result<u8, FromHexError> {
+ match c {
+ b'A'..=b'F' => Ok(c - b'A' + 10),
+ b'a'..=b'f' => Ok(c - b'a' + 10),
+ b'0'..=b'9' => Ok(c - b'0'),
+ _ => Err(FromHexError::InvalidHexCharacter {
+ c: c as char,
+ index: idx,
+ }),
+ }
+}
+
+#[cfg(feature = "alloc")]
+impl FromHex for Vec<u8> {
+ type Error = FromHexError;
+
+ fn from_hex<T: AsRef<[u8]>>(hex: T) -> Result<Self, Self::Error> {
+ let hex = hex.as_ref();
+ if hex.len() % 2 != 0 {
+ return Err(FromHexError::OddLength);
+ }
+
+ hex.chunks(2)
+ .enumerate()
+ .map(|(i, pair)| Ok(val(pair[0], 2 * i)? << 4 | val(pair[1], 2 * i + 1)?))
+ .collect()
+ }
+}
+
+// Helper macro to implement the trait for a few fixed sized arrays. Once Rust
+// has type level integers, this should be removed.
+macro_rules! from_hex_array_impl {
+ ($($len:expr)+) => {$(
+ impl FromHex for [u8; $len] {
+ type Error = FromHexError;
+
+ fn from_hex<T: AsRef<[u8]>>(hex: T) -> Result<Self, Self::Error> {
+ let mut out = [0_u8; $len];
+ decode_to_slice(hex, &mut out as &mut [u8])?;
+ Ok(out)
+ }
+ }
+ )+}
+}
+
+from_hex_array_impl! {
+ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
+ 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
+ 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
+ 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
+ 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
+ 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96
+ 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112
+ 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128
+ 160 192 200 224 256 384 512 768 1024 2048 4096 8192 16384 32768
+}
+
+#[cfg(any(target_pointer_width = "32", target_pointer_width = "64"))]
+from_hex_array_impl! {
+ 65536 131072 262144 524288 1048576 2097152 4194304 8388608
+ 16777216 33554432 67108864 134217728 268435456 536870912
+ 1073741824 2147483648
+}
+
+#[cfg(target_pointer_width = "64")]
+from_hex_array_impl! {
+ 4294967296
+}
+
+/// Encodes `data` as hex string using lowercase characters.
+///
+/// Lowercase characters are used (e.g. `f9b4ca`). The resulting string's
+/// length is always even, each byte in `data` is always encoded using two hex
+/// digits. Thus, the resulting string contains exactly twice as many bytes as
+/// the input data.
+///
+/// # Example
+///
+/// ```
+/// assert_eq!(hex::encode("Hello world!"), "48656c6c6f20776f726c6421");
+/// assert_eq!(hex::encode(vec![1, 2, 3, 15, 16]), "0102030f10");
+/// ```
+#[must_use]
+#[cfg(feature = "alloc")]
+pub fn encode<T: AsRef<[u8]>>(data: T) -> String {
+ data.encode_hex()
+}
+
+/// Encodes `data` as hex string using uppercase characters.
+///
+/// Apart from the characters' casing, this works exactly like `encode()`.
+///
+/// # Example
+///
+/// ```
+/// assert_eq!(hex::encode_upper("Hello world!"), "48656C6C6F20776F726C6421");
+/// assert_eq!(hex::encode_upper(vec![1, 2, 3, 15, 16]), "0102030F10");
+/// ```
+#[must_use]
+#[cfg(feature = "alloc")]
+pub fn encode_upper<T: AsRef<[u8]>>(data: T) -> String {
+ data.encode_hex_upper()
+}
+
+/// Decodes a hex string into raw bytes.
+///
+/// Both, upper and lower case characters are valid in the input string and can
+/// even be mixed (e.g. `f9b4ca`, `F9B4CA` and `f9B4Ca` are all valid strings).
+///
+/// # Example
+///
+/// ```
+/// assert_eq!(
+/// hex::decode("48656c6c6f20776f726c6421"),
+/// Ok("Hello world!".to_owned().into_bytes())
+/// );
+///
+/// assert_eq!(hex::decode("123"), Err(hex::FromHexError::OddLength));
+/// assert!(hex::decode("foo").is_err());
+/// ```
+#[cfg(feature = "alloc")]
+pub fn decode<T: AsRef<[u8]>>(data: T) -> Result<Vec<u8>, FromHexError> {
+ FromHex::from_hex(data)
+}
+
+/// Decode a hex string into a mutable bytes slice.
+///
+/// Both, upper and lower case characters are valid in the input string and can
+/// even be mixed (e.g. `f9b4ca`, `F9B4CA` and `f9B4Ca` are all valid strings).
+///
+/// # Example
+///
+/// ```
+/// let mut bytes = [0u8; 4];
+/// assert_eq!(hex::decode_to_slice("6b697769", &mut bytes as &mut [u8]), Ok(()));
+/// assert_eq!(&bytes, b"kiwi");
+/// ```
+pub fn decode_to_slice<T: AsRef<[u8]>>(data: T, out: &mut [u8]) -> Result<(), FromHexError> {
+ let data = data.as_ref();
+
+ if data.len() % 2 != 0 {
+ return Err(FromHexError::OddLength);
+ }
+ if data.len() / 2 != out.len() {
+ return Err(FromHexError::InvalidStringLength);
+ }
+
+ for (i, byte) in out.iter_mut().enumerate() {
+ *byte = val(data[2 * i], 2 * i)? << 4 | val(data[2 * i + 1], 2 * i + 1)?;
+ }
+
+ Ok(())
+}
+
+// generates an iterator like this
+// (0, 1)
+// (2, 3)
+// (4, 5)
+// (6, 7)
+// ...
+#[inline]
+fn generate_iter(len: usize) -> impl Iterator<Item = (usize, usize)> {
+ (0..len).step_by(2).zip((0..len).skip(1).step_by(2))
+}
+
+// the inverse of `val`.
+#[inline]
+#[must_use]
+fn byte2hex(byte: u8, table: &[u8; 16]) -> (u8, u8) {
+ let high = table[((byte & 0xf0) >> 4) as usize];
+ let low = table[(byte & 0x0f) as usize];
+
+ (high, low)
+}
+
+/// Encodes some bytes into a mutable slice of bytes.
+///
+/// The output buffer, has to be able to hold at least `input.len() * 2` bytes,
+/// otherwise this function will return an error.
+///
+/// # Example
+///
+/// ```
+/// # use hex::FromHexError;
+/// # fn main() -> Result<(), FromHexError> {
+/// let mut bytes = [0u8; 4 * 2];
+///
+/// hex::encode_to_slice(b"kiwi", &mut bytes)?;
+/// assert_eq!(&bytes, b"6b697769");
+/// # Ok(())
+/// # }
+/// ```
+pub fn encode_to_slice<T: AsRef<[u8]>>(input: T, output: &mut [u8]) -> Result<(), FromHexError> {
+ if input.as_ref().len() * 2 != output.len() {
+ return Err(FromHexError::InvalidStringLength);
+ }
+
+ for (byte, (i, j)) in input
+ .as_ref()
+ .iter()
+ .zip(generate_iter(input.as_ref().len() * 2))
+ {
+ let (high, low) = byte2hex(*byte, HEX_CHARS_LOWER);
+ output[i] = high;
+ output[j] = low;
+ }
+
+ Ok(())
+}
+
+#[cfg(test)]
+mod test {
+ use super::*;
+ #[cfg(feature = "alloc")]
+ use alloc::string::ToString;
+ use pretty_assertions::assert_eq;
+
+ #[test]
+ #[cfg(feature = "alloc")]
+ fn test_gen_iter() {
+ let result = vec![(0, 1), (2, 3)];
+
+ assert_eq!(generate_iter(5).collect::<Vec<_>>(), result);
+ }
+
+ #[test]
+ fn test_encode_to_slice() {
+ let mut output_1 = [0; 4 * 2];
+ encode_to_slice(b"kiwi", &mut output_1).unwrap();
+ assert_eq!(&output_1, b"6b697769");
+
+ let mut output_2 = [0; 5 * 2];
+ encode_to_slice(b"kiwis", &mut output_2).unwrap();
+ assert_eq!(&output_2, b"6b69776973");
+
+ let mut output_3 = [0; 100];
+
+ assert_eq!(
+ encode_to_slice(b"kiwis", &mut output_3),
+ Err(FromHexError::InvalidStringLength)
+ );
+ }
+
+ #[test]
+ fn test_decode_to_slice() {
+ let mut output_1 = [0; 4];
+ decode_to_slice(b"6b697769", &mut output_1).unwrap();
+ assert_eq!(&output_1, b"kiwi");
+
+ let mut output_2 = [0; 5];
+ decode_to_slice(b"6b69776973", &mut output_2).unwrap();
+ assert_eq!(&output_2, b"kiwis");
+
+ let mut output_3 = [0; 4];
+
+ assert_eq!(
+ decode_to_slice(b"6", &mut output_3),
+ Err(FromHexError::OddLength)
+ );
+ }
+
+ #[test]
+ #[cfg(feature = "alloc")]
+ fn test_encode() {
+ assert_eq!(encode("foobar"), "666f6f626172");
+ }
+
+ #[test]
+ #[cfg(feature = "alloc")]
+ fn test_decode() {
+ assert_eq!(
+ decode("666f6f626172"),
+ Ok(String::from("foobar").into_bytes())
+ );
+ }
+
+ #[test]
+ #[cfg(feature = "alloc")]
+ pub fn test_from_hex_okay_str() {
+ assert_eq!(Vec::from_hex("666f6f626172").unwrap(), b"foobar");
+ assert_eq!(Vec::from_hex("666F6F626172").unwrap(), b"foobar");
+ }
+
+ #[test]
+ #[cfg(feature = "alloc")]
+ pub fn test_from_hex_okay_bytes() {
+ assert_eq!(Vec::from_hex(b"666f6f626172").unwrap(), b"foobar");
+ assert_eq!(Vec::from_hex(b"666F6F626172").unwrap(), b"foobar");
+ }
+
+ #[test]
+ #[cfg(feature = "alloc")]
+ pub fn test_invalid_length() {
+ assert_eq!(Vec::from_hex("1").unwrap_err(), FromHexError::OddLength);
+ assert_eq!(
+ Vec::from_hex("666f6f6261721").unwrap_err(),
+ FromHexError::OddLength
+ );
+ }
+
+ #[test]
+ #[cfg(feature = "alloc")]
+ pub fn test_invalid_char() {
+ assert_eq!(
+ Vec::from_hex("66ag").unwrap_err(),
+ FromHexError::InvalidHexCharacter { c: 'g', index: 3 }
+ );
+ }
+
+ #[test]
+ #[cfg(feature = "alloc")]
+ pub fn test_empty() {
+ assert_eq!(Vec::from_hex("").unwrap(), b"");
+ }
+
+ #[test]
+ #[cfg(feature = "alloc")]
+ pub fn test_from_hex_whitespace() {
+ assert_eq!(
+ Vec::from_hex("666f 6f62617").unwrap_err(),
+ FromHexError::InvalidHexCharacter { c: ' ', index: 4 }
+ );
+ }
+
+ #[test]
+ pub fn test_from_hex_array() {
+ assert_eq!(
+ <[u8; 6] as FromHex>::from_hex("666f6f626172"),
+ Ok([0x66, 0x6f, 0x6f, 0x62, 0x61, 0x72])
+ );
+
+ assert_eq!(
+ <[u8; 5] as FromHex>::from_hex("666f6f626172"),
+ Err(FromHexError::InvalidStringLength)
+ );
+ }
+
+ #[test]
+ #[cfg(feature = "alloc")]
+ fn test_to_hex() {
+ assert_eq!(
+ [0x66, 0x6f, 0x6f, 0x62, 0x61, 0x72].encode_hex::<String>(),
+ "666f6f626172".to_string(),
+ );
+
+ assert_eq!(
+ [0x66, 0x6f, 0x6f, 0x62, 0x61, 0x72].encode_hex_upper::<String>(),
+ "666F6F626172".to_string(),
+ );
+ }
+}
diff --git a/src/serde.rs b/src/serde.rs
new file mode 100644
index 0000000..335a151
--- /dev/null
+++ b/src/serde.rs
@@ -0,0 +1,102 @@
+//! Hex encoding with `serde`.
+#[cfg_attr(
+ all(feature = "alloc", feature = "serde"),
+ doc = r##"
+# Example
+
+```
+use serde::{Serialize, Deserialize};
+
+#[derive(Serialize, Deserialize)]
+struct Foo {
+ #[serde(with = "hex")]
+ bar: Vec<u8>,
+}
+```
+"##
+)]
+use serde::de::{Error, Visitor};
+use serde::Deserializer;
+#[cfg(feature = "alloc")]
+use serde::Serializer;
+
+#[cfg(feature = "alloc")]
+use alloc::string::String;
+
+use core::fmt;
+use core::marker::PhantomData;
+
+use crate::FromHex;
+
+#[cfg(feature = "alloc")]
+use crate::ToHex;
+
+/// Serializes `data` as hex string using uppercase characters.
+///
+/// Apart from the characters' casing, this works exactly like `serialize()`.
+#[cfg(feature = "alloc")]
+pub fn serialize_upper<S, T>(data: T, serializer: S) -> Result<S::Ok, S::Error>
+where
+ S: Serializer,
+ T: ToHex,
+{
+ let s = data.encode_hex_upper::<String>();
+ serializer.serialize_str(&s)
+}
+
+/// Serializes `data` as hex string using lowercase characters.
+///
+/// Lowercase characters are used (e.g. `f9b4ca`). The resulting string's length
+/// is always even, each byte in data is always encoded using two hex digits.
+/// Thus, the resulting string contains exactly twice as many bytes as the input
+/// data.
+#[cfg(feature = "alloc")]
+pub fn serialize<S, T>(data: T, serializer: S) -> Result<S::Ok, S::Error>
+where
+ S: Serializer,
+ T: ToHex,
+{
+ let s = data.encode_hex::<String>();
+ serializer.serialize_str(&s)
+}
+
+/// Deserializes a hex string into raw bytes.
+///
+/// Both, upper and lower case characters are valid in the input string and can
+/// even be mixed (e.g. `f9b4ca`, `F9B4CA` and `f9B4Ca` are all valid strings).
+pub fn deserialize<'de, D, T>(deserializer: D) -> Result<T, D::Error>
+where
+ D: Deserializer<'de>,
+ T: FromHex,
+ <T as FromHex>::Error: fmt::Display,
+{
+ struct HexStrVisitor<T>(PhantomData<T>);
+
+ impl<'de, T> Visitor<'de> for HexStrVisitor<T>
+ where
+ T: FromHex,
+ <T as FromHex>::Error: fmt::Display,
+ {
+ type Value = T;
+
+ fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ write!(f, "a hex encoded string")
+ }
+
+ fn visit_str<E>(self, data: &str) -> Result<Self::Value, E>
+ where
+ E: Error,
+ {
+ FromHex::from_hex(data).map_err(Error::custom)
+ }
+
+ fn visit_borrowed_str<E>(self, data: &'de str) -> Result<Self::Value, E>
+ where
+ E: Error,
+ {
+ FromHex::from_hex(data).map_err(Error::custom)
+ }
+ }
+
+ deserializer.deserialize_str(HexStrVisitor(PhantomData))
+}
diff --git a/tests/serde.rs b/tests/serde.rs
new file mode 100644
index 0000000..a571d3a
--- /dev/null
+++ b/tests/serde.rs
@@ -0,0 +1,59 @@
+#![cfg(all(feature = "serde", feature = "alloc"))]
+#![allow(clippy::blacklisted_name)]
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+struct Foo {
+ #[serde(with = "hex")]
+ bar: Vec<u8>,
+}
+
+#[test]
+fn serialize() {
+ let foo = Foo {
+ bar: vec![1, 10, 100],
+ };
+
+ let ser = serde_json::to_string(&foo).expect("serialization failed");
+ assert_eq!(ser, r#"{"bar":"010a64"}"#);
+}
+
+#[test]
+fn deserialize() {
+ let foo = Foo {
+ bar: vec![1, 10, 100],
+ };
+
+ let de: Foo = serde_json::from_str(r#"{"bar":"010a64"}"#).expect("deserialization failed");
+ assert_eq!(de, foo);
+}
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+struct Bar {
+ #[serde(
+ serialize_with = "hex::serialize_upper",
+ deserialize_with = "hex::deserialize"
+ )]
+ foo: Vec<u8>,
+}
+
+#[test]
+fn serialize_upper() {
+ let bar = Bar {
+ foo: vec![1, 10, 100],
+ };
+
+ let ser = serde_json::to_string(&bar).expect("serialization failed");
+ assert_eq!(ser, r#"{"foo":"010A64"}"#);
+}
+
+#[test]
+fn deserialize_upper() {
+ let bar = Bar {
+ foo: vec![1, 10, 100],
+ };
+
+ let de: Bar = serde_json::from_str(r#"{"foo":"010A64"}"#).expect("deserialization failed");
+ assert_eq!(de, bar);
+}
diff --git a/tests/version-number.rs b/tests/version-number.rs
new file mode 100644
index 0000000..c4f4084
--- /dev/null
+++ b/tests/version-number.rs
@@ -0,0 +1,11 @@
+#![allow(non_fmt_panic)]
+
+#[test]
+fn test_readme_deps() {
+ version_sync::assert_markdown_deps_updated!("README.md");
+}
+
+#[test]
+fn test_html_root_url() {
+ version_sync::assert_html_root_url_updated!("src/lib.rs");
+}
