Update contrib/restricted/fast_float to 8.1.0

commit_hash:f7f58474cea1ab7af06958529ec19bb7e99d0235

Author: robot-piglet

contrib/restricted/fast_float/.yandex_meta/devtools.licenses.report

@@ -39,7 +39,7 @@ BELONGS ya.make
         Match type      : TAG
         Links           : http://opensource.org/licenses/mit-license.php, https://spdx.org/licenses/MIT
     Files with this license:
-        README.md [543:543]
+        README.md [605:605]
 
 KEEP     BSL-1.0              2c7a3fa82e66676005cd4ee2608fd7d2
 BELONGS ya.make
@@ -87,7 +87,7 @@ BELONGS ya.make
         Match type      : REFERENCE
         Links           : http://www.apache.org/licenses/, http://www.apache.org/licenses/LICENSE-2.0, https://spdx.org/licenses/Apache-2.0
     Files with this license:
-        README.md [542:543]
+        README.md [604:605]
 
 KEEP     Apache-2.0 AND MIT   a76785199b4beee1ba8a8173f3d43241
 BELONGS ya.make
@@ -98,14 +98,14 @@ BELONGS ya.make
         Match type      : NOTICE
         Links           : http://www.apache.org/licenses/, http://www.apache.org/licenses/LICENSE-2.0, https://spdx.org/licenses/Apache-2.0
     Files with this license:
-        README.md [537:552]
+        README.md [599:614]
     Scancode info:
         Original SPDX id: MIT
         Score           : 49.30
         Match type      : NOTICE
         Links           : http://opensource.org/licenses/mit-license.php, https://spdx.org/licenses/MIT
     Files with this license:
-        README.md [537:552]
+        README.md [599:614]
 
 KEEP     BSL-1.0 AND BSL-1.0  a8fd7a0ddc7793219e50dfdeb4742dfc
 BELONGS ya.make
@@ -117,14 +117,14 @@ BELONGS ya.make
         Match type      : REFERENCE
         Links           : http://www.boost.org/LICENSE_1_0.txt, http://www.boost.org/users/license.html, https://spdx.org/licenses/BSL-1.0
     Files with this license:
-        README.md [544:544]
+        README.md [606:606]
     Scancode info:
         Original SPDX id: BSL-1.0
         Score           : 99.00
         Match type      : REFERENCE
         Links           : http://www.boost.org/LICENSE_1_0.txt, http://www.boost.org/users/license.html, https://spdx.org/licenses/BSL-1.0
     Files with this license:
-        README.md [544:544]
+        README.md [606:606]
 
 KEEP     Apache-2.0           c48d93dbb5419f7a8844879928a2fda7
 BELONGS ya.make
@@ -136,7 +136,7 @@ BELONGS ya.make
         Match type      : NOTICE
         Links           : http://www.apache.org/licenses/, http://www.apache.org/licenses/LICENSE-2.0, https://spdx.org/licenses/Apache-2.0
     Files with this license:
-        README.md [537:537]
+        README.md [599:599]
 
 KEEP     Apache-2.0 OR MIT OR BSL-1.0 dbfbb7aa50e4925e728f16d4a8adf7d9
 BELONGS ya.make
@@ -148,14 +148,14 @@ BELONGS ya.make
         Match type      : INTRO
         Links           : https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/licenses/unknown-license-reference.LICENSE
     Files with this license:
-        README.md [542:542]
+        README.md [604:604]
     Scancode info:
         Original SPDX id: Apache-2.0
         Score           : 90.00
         Match type      : TAG
         Links           : http://www.apache.org/licenses/, http://www.apache.org/licenses/LICENSE-2.0, https://spdx.org/licenses/Apache-2.0
     Files with this license:
-        README.md [542:542]
+        README.md [604:604]
 
 KEEP     Apache-2.0           fb21a7d67961597593aefff800484f8d
 BELONGS ya.make

contrib/restricted/fast_float/.yandex_meta/override.nix

@@ -1,11 +1,11 @@
 self: super: with self; rec {
   name = "fast_float";
-  version = "8.0.2";
+  version = "8.1.0";
 
   src = fetchFromGitHub {
     owner = "fastfloat";
     repo = "fast_float";
     rev = "v${version}";
-    hash = "sha256-lKEzRYKdpjsqixC9WBoILccqB2ZkUtPUzT4Q4+j0oac=";
+    hash = "sha256-kTLmk+mxfdN/+vKdyohcaNSeoAkhJf3uesaBOz123ag=";
   };
 }

contrib/restricted/fast_float/README.md

@@ -57,6 +57,7 @@ Example:
 ```C++
 #include "fast_float/fast_float.h"
 #include <iostream>
+#include <string>
 
 int main() {
   std::string input = "3.1416 xyz ";
@@ -68,6 +69,25 @@ int main() {
 }
 ```
 
+Though the C++17 standard has you do a comparison with `std::errc()` to check whether the conversion worked, you can avoid it by casting the result to a `bool` like so:
+
+```cpp
+#include "fast_float/fast_float.h"
+#include <iostream>
+#include <string>
+
+int main() {
+  std::string input = "3.1416 xyz ";
+  double result;
+  if(auto answer = fast_float::from_chars(input.data(), input.data() + input.size(), result)) {
+    std::cout << "parsed the number " << result << std::endl;
+    return EXIT_SUCCESS;
+  }
+  std::cerr << "failed to parse " << result << std::endl;
+  return EXIT_FAILURE;
+}
+```
+
 You can parse delimited numbers:
 
 ```C++
@@ -357,13 +377,43 @@ int main() {
 }
 ```
 
+## Multiplication of an integer by a power of 10
+An integer `W` can be multiplied by a power of ten `10^Q` and
+converted to `double` with correctly rounded value
+(in "round to nearest, tie to even" fashion) using
+`fast_float::integer_times_pow10()`, e.g.:
+```C++
+const uint64_t W = 12345678901234567;
+const int Q = 23;
+const double result = fast_float::integer_times_pow10(W, Q);
+std::cout.precision(17);
+std::cout << W << " * 10^" << Q << " = " << result << " ("
+  << (result == 12345678901234567e23 ? "==" : "!=") << "expected)\n";
+```
+outputs
+```
+12345678901234567 * 10^23 = 1.2345678901234567e+39 (==expected)
+```
+`fast_float::integer_times_pow10()` gives the same result as
+using `fast_float::from_chars()` when parsing the string `"WeQ"`
+(in this example `"12345678901234567e23"`),
+except `fast_float::integer_times_pow10()` does not report out-of-range errors, and
+underflows to zero or overflows to infinity when the resulting value is
+out of range.
+
+Overloads of `fast_float::integer_times_pow10()` are provided for
+signed and unsigned integer types: `int64_t`, `uint64_t`, etc.
+
+
 ## Users and Related Work
 
 The fast_float library is part of:
 
 * GCC (as of version 12): the `from_chars` function in GCC relies on fast_float,
 * [Chromium](https://github.com/Chromium/Chromium), the engine behind Google
   Chrome, Microsoft Edge, and Opera,
+* Boost JSON, MySQL, etc.
+* Blender
 * [WebKit](https://github.com/WebKit/WebKit), the engine behind Safari (Apple's
   web browser),
 * [DuckDB](https://duckdb.org),
@@ -376,7 +426,10 @@ The fast_float library is part of:
 The fastfloat algorithm is part of the [LLVM standard
 libraries](https://github.com/llvm/llvm-project/commit/87c016078ad72c46505461e4ff8bfa04819fe7ba).
 There is a [derived implementation part of
-AdaCore](https://github.com/AdaCore/VSS).
+AdaCore](https://github.com/AdaCore/VSS). The [SerenityOS operating
+system](https://github.com/SerenityOS/serenity/commit/53b7f5e6a11e663c83df8030c3171c5945cb75ec)
+has a derived implementation that is inherited by the [Ladybird
+Browser](https://github.com/LadybirdBrowser/ladybird).
 
 The fast_float library provides a performance similar to that of the
 [fast_double_parser](https://github.com/lemire/fast_double_parser) library but
@@ -385,6 +438,14 @@ API more in line with the expectations of C++ programmers. The
 fast_double_parser library is part of the [Microsoft LightGBM machine-learning
 framework](https://github.com/microsoft/LightGBM).
 
+
+
+Packages
+------
+
+[![Packaging status](https://repology.org/badge/vertical-allrepos/fastfloat.svg)](https://repology.org/project/fastfloat/versions)
+
+
 ## References
 
 * Daniel Lemire, [Number Parsing at a Gigabyte per
@@ -455,7 +516,7 @@ sufficiently recent version of CMake (3.11 or better at least):
 FetchContent_Declare(
   fast_float
   GIT_REPOSITORY https://github.com/fastfloat/fast_float.git
-  GIT_TAG tags/v8.0.2
+  GIT_TAG tags/v8.1.0
   GIT_SHALLOW TRUE)
 
 FetchContent_MakeAvailable(fast_float)
@@ -471,7 +532,7 @@ You may also use [CPM](https://github.com/cpm-cmake/CPM.cmake), like so:
 CPMAddPackage(
   NAME fast_float
   GITHUB_REPOSITORY "fastfloat/fast_float"
-  GIT_TAG v8.0.2)
+  GIT_TAG v8.1.0)
 ```
 
 ## Using as single header
@@ -483,7 +544,7 @@ if desired as described in the command line help.
 
 You may directly download automatically generated single-header files:
 
-<https://github.com/fastfloat/fast_float/releases/download/v8.0.2/fast_float.h>
+<https://github.com/fastfloat/fast_float/releases/download/v8.1.0/fast_float.h>
 
 ## Benchmarking
 
@@ -522,6 +583,7 @@ cmake --build build
   manager](https://conan.io/center/recipes/fast_float).
 * It is part of the [brew package
   manager](https://formulae.brew.sh/formula/fast_float).
+* fast_float is available on [xmake](https://xmake.io) repository.
 * Some Linux distribution like Fedora include fast_float (e.g., as
   `fast_float-devel`).
 

contrib/restricted/fast_float/include/fast_float/ascii_number.h

@@ -441,7 +441,7 @@ parse_number_string(UC const *p, UC const *pend,
     if (digit_count > 19) {
       answer.too_many_digits = true;
       // Let us start again, this time, avoiding overflows.
-      // We don't need to check if is_integer, since we use the
+      // We don't need to call if is_integer, since we use the
       // pre-tokenized spans from above.
       i = 0;
       p = answer.integer.ptr;
@@ -451,7 +451,7 @@ parse_number_string(UC const *p, UC const *pend,
         i = i * 10 + uint64_t(*p - UC('0'));
         ++p;
       }
-      if (i >= minimal_nineteen_digit_integer) { // We have a big integers
+      if (i >= minimal_nineteen_digit_integer) { // We have a big integer
         exponent = end_of_integer_part - p + exp_number;
       } else { // We have a value with a fractional component.
         p = answer.fraction.ptr;

contrib/restricted/fast_float/include/fast_float/fast_float.h

@@ -45,6 +45,24 @@ FASTFLOAT_CONSTEXPR20 from_chars_result_t<UC>
 from_chars_advanced(UC const *first, UC const *last, T &value,
                     parse_options_t<UC> options) noexcept;
 
+/**
+ * This function multiplies an integer number by a power of 10 and returns
+ * the result as a double precision floating-point value that is correctly
+ * rounded. The resulting floating-point value is the closest floating-point
+ * value, using the "round to nearest, tie to even" convention for values that
+ * would otherwise fall right in-between two values. That is, we provide exact
+ * conversion according to the IEEE standard.
+ *
+ * On overflow infinity is returned, on underflow 0 is returned.
+ *
+ * The implementation does not throw and does not allocate memory (e.g., with
+ * `new` or `malloc`).
+ */
+FASTFLOAT_CONSTEXPR20 inline double
+integer_times_pow10(uint64_t mantissa, int decimal_exponent) noexcept;
+FASTFLOAT_CONSTEXPR20 inline double
+integer_times_pow10(int64_t mantissa, int decimal_exponent) noexcept;
+
 /**
  * from_chars for integer types.
  */

contrib/restricted/fast_float/include/fast_float/float_common.h

@@ -16,8 +16,8 @@
 #include "constexpr_feature_detect.h"
 
 #define FASTFLOAT_VERSION_MAJOR 8
-#define FASTFLOAT_VERSION_MINOR 0
-#define FASTFLOAT_VERSION_PATCH 2
+#define FASTFLOAT_VERSION_MINOR 1
+#define FASTFLOAT_VERSION_PATCH 0
 
 #define FASTFLOAT_STRINGIZE_IMPL(x) #x
 #define FASTFLOAT_STRINGIZE(x) FASTFLOAT_STRINGIZE_IMPL(x)
@@ -58,6 +58,11 @@ enum class chars_format : uint64_t {
 template <typename UC> struct from_chars_result_t {
   UC const *ptr;
   std::errc ec;
+
+  // https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2497r0.html
+  constexpr explicit operator bool() const noexcept {
+    return ec == std::errc();
+  }
 };
 
 using from_chars_result = from_chars_result_t<char>;
@@ -88,11 +93,12 @@ using parse_options = parse_options_t<char>;
      defined(__MINGW64__) || defined(__s390x__) ||                             \
      (defined(__ppc64__) || defined(__PPC64__) || defined(__ppc64le__) ||      \
       defined(__PPC64LE__)) ||                                                 \
-     defined(__loongarch64))
+     defined(__loongarch64) || (defined(__riscv) && __riscv_xlen == 64))
 #define FASTFLOAT_64BIT 1
 #elif (defined(__i386) || defined(__i386__) || defined(_M_IX86) ||             \
        defined(__arm__) || defined(_M_ARM) || defined(__ppc__) ||              \
-       defined(__MINGW32__) || defined(__EMSCRIPTEN__))
+       defined(__MINGW32__) || defined(__EMSCRIPTEN__) ||                      \
+       (defined(__riscv) && __riscv_xlen == 32))
 #define FASTFLOAT_32BIT 1
 #else
   // Need to check incrementally, since SIZE_MAX is a size_t, avoid overflow.
@@ -1126,7 +1132,12 @@ template <typename T> constexpr uint64_t int_luts<T>::min_safe_u64[];
 
 template <typename UC>
 fastfloat_really_inline constexpr uint8_t ch_to_digit(UC c) {
-  return int_luts<>::chdigit[static_cast<unsigned char>(c)];
+  // wchar_t and char can be signed, so we need to be careful.
+  using UnsignedUC = typename std::make_unsigned<UC>::type;
+  return int_luts<>::chdigit[static_cast<unsigned char>(
+      static_cast<UnsignedUC>(c) &
+      static_cast<UnsignedUC>(
+          -((static_cast<UnsignedUC>(c) & ~0xFFull) == 0)))];
 }
 
 fastfloat_really_inline constexpr size_t max_digits_u64(int base) {