From e4c8d0eb8ef4acb5d7a4252b3b87feb391ef7e41 Mon Sep 17 00:00:00 2001 From: Abseil Team Date: Fri, 18 Oct 2019 09:06:29 -0700 Subject: Export of internal Abseil changes -- a9ac6567c0933d786d68c10011e3f3ff9deedf89 by Greg Falcon : Add absl::FunctionRef, a type analogous to the proposed C++23 std::function_ref. Like std::function, FunctionRef can be used to type-erase any callable (invokable) object. However, FunctionRef works by reference: it does not store a copy of the type-erased object. If the wrapped object is destroyed before the FunctionRef, the reference becomes dangling. FunctionRef relates to std::function in much the same way that string_view relates to std::string. Because of these limitations, FunctionRef is best used only as a function argument type, and only where the function will be invoked immediately (rather than saved for later use). When `const std::function<...>&` is used in this way, `absl::FunctionRef<...>` is a better-performing replacement. PiperOrigin-RevId: 275484044 -- 1f7c4df3760f8b93e5a5baf40b070eca1d3f4c98 by Abseil Team : Add FastHexToBufferZeroPad16() function for blazingly fast hex encoding of uint64_t. PiperOrigin-RevId: 275420901 -- 08d48ac004eba57cf2f1ada827181a2995f74807 by Abseil Team : Avoid applying the workaround for MSVC's static initialization problems when using clang-cl. PiperOrigin-RevId: 275366326 -- 40be82bd2b34670b5458c0a72a0475086153c2d6 by Abseil Team : Added comments to SimpleAtof()/SimpleAtod() that clarify that they always use the "C" locale, unlike the standard functions strtod() and strtof() referenced now in the comments. PiperOrigin-RevId: 275355815 -- 086779dacb3f6f2b3ab59947e94e79046bdb1fe1 by Jorg Brown : Move the hex conversion table used by escaping.cc into numbers.h so that other parts of Abseil can more efficiently access it. PiperOrigin-RevId: 275331251 -- 3c4ed1b04e55d96a40cbe70fb70929ffbb0c0432 by Abseil Team : Avoid applying the workaround for MSVC's static initialization problems when using clang-cl. PiperOrigin-RevId: 275323858 -- 56ceb58ab688c3761978308609b09a1ac2739c9a by Derek Mauro : Add script for testing on Alpine Linux (for musl test coverage) PiperOrigin-RevId: 275321244 GitOrigin-RevId: a9ac6567c0933d786d68c10011e3f3ff9deedf89 Change-Id: I39799fa03768ddb44f3166200c860e1da4461807 --- absl/strings/numbers.cc | 29 ++++++++++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-) (limited to 'absl/strings/numbers.cc') diff --git a/absl/strings/numbers.cc b/absl/strings/numbers.cc index 38d1486..d7b94fc 100644 --- a/absl/strings/numbers.cc +++ b/absl/strings/numbers.cc @@ -19,8 +19,8 @@ #include #include -#include // for DBL_DIG and FLT_DIG -#include // for HUGE_VAL +#include // for DBL_DIG and FLT_DIG +#include // for HUGE_VAL #include #include #include @@ -34,6 +34,7 @@ #include "absl/base/internal/raw_logging.h" #include "absl/strings/ascii.h" #include "absl/strings/charconv.h" +#include "absl/strings/escaping.h" #include "absl/strings/internal/memutil.h" #include "absl/strings/match.h" #include "absl/strings/str_cat.h" @@ -885,6 +886,28 @@ inline bool safe_uint_internal(absl::string_view text, IntType* value_p, } // anonymous namespace namespace numbers_internal { + +// Digit conversion. +ABSL_CONST_INIT const char kHexChar[] = "0123456789abcdef"; + +ABSL_CONST_INIT const char kHexTable[513] = + "000102030405060708090a0b0c0d0e0f" + "101112131415161718191a1b1c1d1e1f" + "202122232425262728292a2b2c2d2e2f" + "303132333435363738393a3b3c3d3e3f" + "404142434445464748494a4b4c4d4e4f" + "505152535455565758595a5b5c5d5e5f" + "606162636465666768696a6b6c6d6e6f" + "707172737475767778797a7b7c7d7e7f" + "808182838485868788898a8b8c8d8e8f" + "909192939495969798999a9b9c9d9e9f" + "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf" + "b0b1b2b3b4b5b6b7b8b9babbbcbdbebf" + "c0c1c2c3c4c5c6c7c8c9cacbcccdcecf" + "d0d1d2d3d4d5d6d7d8d9dadbdcdddedf" + "e0e1e2e3e4e5e6e7e8e9eaebecedeeef" + "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff"; + bool safe_strto32_base(absl::string_view text, int32_t* value, int base) { return safe_int_internal(text, value, base); } @@ -900,6 +923,6 @@ bool safe_strtou32_base(absl::string_view text, uint32_t* value, int base) { bool safe_strtou64_base(absl::string_view text, uint64_t* value, int base) { return safe_uint_internal(text, value, base); } -} // namespace numbers_internal +} // namespace numbers_internal } // namespace absl -- cgit v1.2.3