[deps] Update is_utf8 to version 1.3.0

deps/is_utf8/.gitignore

@@ -0,0 +1,2 @@
+build/
+src/dependencies/

deps/is_utf8/CMakeLists.txt

@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.15)
 project(is_utf8
   DESCRIPTION "Fast UTF-8 Validation"
   LANGUAGES CXX
-  VERSION 1.2.1
+  VERSION 1.3.0
 )
 
 include(GNUInstallDirs)
@@ -25,8 +25,8 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 set(CMAKE_MACOSX_RPATH OFF)
 
-set(IS_UTF8_LIB_VERSION "1.2.1" CACHE STRING "is_utf8 library version")
-set(IS_UTF8_LIB_SOVERSION "1" CACHE STRING "is_utf8 library soversion")
+set(IS_UTF8_LIB_VERSION "1.3.0" CACHE STRING "is_utf8 library version")
+set(IS_UTF8_LIB_SOVERSION "2" CACHE STRING "is_utf8 library soversion")
 
 set(IS_UTF8_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/src)
 add_subdirectory(src)

deps/is_utf8/README.md

@@ -3,12 +3,10 @@
 Most strings online are in unicode using the UTF-8 encoding. Validating strings
 quickly before accepting them is important.
 
-
-
-
 ## How to use is_utf8
 
-This is a simple one-source file library to validate UTF-8 strings at high speeds using SIMD instructions. It works on all platforms (ARM, x64).
+This is a simple one-source file library to validate UTF-8 strings at high
+speeds using SIMD instructions. It works on all platforms (ARM, x64).
 
 Build and link `is_utf8.cpp` with your project. Code usage:
 
@@ -21,13 +19,66 @@ Build and link `is_utf8.cpp` with your project. Code usage:
 
 It should be able to validate strings using less than 1 cycle per input byte.
 
+## Requirements
+
+- C++11 compatible compiler. We support LLVM clang, GCC, Visual Studio. (Our
+  optional benchmark tool requires C++17.)
+- For high speed, you should have a recent 64-bit system (e.g., ARM or x64).
+- If you rely on CMake, you should use a recent CMake (at least 3.15).
+- AVX-512 support require a processor with AVX512-VBMI2 (Ice Lake or better) and
+  a recent compiler (GCC 8 or better, Visual Studio 2019 or better, LLVM clang 6
+  or better). You need a correspondingly recent assembler such as gas (2.30+) or
+  nasm (2.14+): recent compilers usually come with recent assemblers. If you mix
+  a recent compiler with an incompatible/old assembler (e.g., when using a
+  recent compiler with an old Linux distribution), you may get errors at build
+  time because the compiler produces instructions that the assembler does not
+  recognize: you should update your assembler to match your compiler (e.g.,
+  upgrade binutils to version 2.30 or better under Linux) or use an older
+  compiler matching the capabilities of your assembler.
+
+## Build with CMake
+
+```
+cmake -B build
+cmake --build build
+cd build
+ctest .
+```
+
+Visual Studio users must specify whether they want to build the Release or Debug
+version.
+
+To run benchmarks, build and execute the `bench` command.
+
+```
+cmake -B build
+cmake --build build
+./build/benchmarks/bench
+```
+
+Instructions are similar for Visual Studio users.
+
+## Real-word usage
+
+This C++ library is part of the JavaScript package
+[utf-8-validate](https://github.com/websockets/utf-8-validate). The
+utf-8-validate package is routinely downloaded more than
+[a million times per week](https://www.npmjs.com/package/utf-8-validate).
+
+If you are using Node JS (19.4.0 or better), you already have access to this
+function as
+[`buffer.isUtf8(input)`](https://nodejs.org/api/buffer.html#bufferisutf8input).
+
 ## Reference
 
-- John Keiser, Daniel Lemire, [Validating UTF-8 In Less Than One Instruction Per Byte](https://arxiv.org/abs/2010.03090), Software: Practice & Experience 51 (5), 2021
+- John Keiser, Daniel Lemire,
+  [Validating UTF-8 In Less Than One Instruction Per Byte](https://arxiv.org/abs/2010.03090),
+  Software: Practice & Experience 51 (5), 2021
 
-### Want more?
+## Want more?
 
-If you want a wide range of fast Unicode function for production use, you can rely on the simdutf library. It is as simple as the following:
+If you want a wide range of fast Unicode function for production use, you can
+rely on the simdutf library. It is as simple as the following:
 
 ```C++
 #include "simdutf.cpp"
@@ -48,12 +99,11 @@ int main(int argc, char *argv[]) {
 
 See https://github.com/simdutf/
 
-
 ## License
 
-This library is distributed under the terms of any of the following
-licenses, at your option:
+This library is distributed under the terms of any of the following licenses, at
+your option:
 
-* Apache License (Version 2.0) [LICENSE-APACHE](LICENSE-APACHE),
-* Boost Software License [LICENSE-BOOST](LICENSE-BOOST), or
-* MIT License [LICENSE-MIT](LICENSE-MIT).
+- Apache License (Version 2.0) [LICENSE-APACHE](LICENSE-APACHE),
+- Boost Software License [LICENSE-BOOST](LICENSE-BOOST), or
+- MIT License [LICENSE-MIT](LICENSE-MIT).

deps/is_utf8/src/is_utf8.cpp

@@ -688,7 +688,7 @@ class implementation {
 
   virtual uint32_t required_instruction_sets() const {
     return _required_instruction_sets;
-  };
+  }
 
   /**
    * Validate the UTF-8 string.
@@ -826,17 +826,15 @@ template <typename T> class atomic_ptr {
 /**
  * The list of available implementations compiled into simdutf.
  */
-extern IS_UTF8_DLLIMPORTEXPORT const internal::available_implementation_list
-    available_implementations;
+extern IS_UTF8_DLLIMPORTEXPORT const internal::available_implementation_list& get_available_implementations();
 
 /**
  * The active implementation.
  *
  * Automatically initialized on first use to the most advanced implementation
  * supported by this hardware.
  */
-extern IS_UTF8_DLLIMPORTEXPORT internal::atomic_ptr<const implementation>
-    active_implementation;
+extern IS_UTF8_DLLIMPORTEXPORT internal::atomic_ptr<const implementation>& get_active_implementation();
 
 } // namespace is_utf8_internals
 
@@ -4640,33 +4638,39 @@ detect_best_supported_implementation_on_first_use::set_best() const noexcept {
 
   if (force_implementation_name) {
     auto force_implementation =
-        available_implementations[force_implementation_name];
+        get_available_implementations()[force_implementation_name];
     if (force_implementation) {
-      return active_implementation = force_implementation;
+      return get_active_implementation() = force_implementation;
     } else {
       // Note: abort() and stderr usage within the library is forbidden.
-      return active_implementation = &unsupported_singleton;
+      return get_active_implementation() = &unsupported_singleton;
     }
   }
-  return active_implementation =
-             available_implementations.detect_best_supported();
+  return get_active_implementation() =
+             get_available_implementations().detect_best_supported();
 }
 
 } // namespace internal
 
-IS_UTF8_DLLIMPORTEXPORT const internal::available_implementation_list
-    available_implementations{};
-IS_UTF8_DLLIMPORTEXPORT internal::atomic_ptr<const implementation>
-    active_implementation{
-        &internal::detect_best_supported_implementation_on_first_use_singleton};
+IS_UTF8_DLLIMPORTEXPORT const internal::available_implementation_list& get_available_implementations() {
+  static const internal::available_implementation_list available_implementations{};
+  return available_implementations;
+}
+
+IS_UTF8_DLLIMPORTEXPORT internal::atomic_ptr<const implementation>& get_active_implementation() {
+    static const internal::detect_best_supported_implementation_on_first_use detect_best_supported_implementation_on_first_use_singleton;
+    static internal::atomic_ptr<const implementation> active_implementation{&detect_best_supported_implementation_on_first_use_singleton};
+    return active_implementation;
+}
+
 
 is_utf8_warn_unused bool validate_utf8(const char *buf, size_t len) noexcept {
-  return active_implementation->validate_utf8(buf, len);
+  return get_active_implementation()->validate_utf8(buf, len);
 }
 
 const implementation *builtin_implementation() {
   static const implementation *builtin_impl =
-      available_implementations[IS_UTF8_STRINGIFY(
+      get_available_implementations()[IS_UTF8_STRINGIFY(
           IS_UTF8_BUILTIN_IMPLEMENTATION)];
   return builtin_impl;
 }