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/escaping.cc | 33 ++++++--------------------------- 1 file changed, 6 insertions(+), 27 deletions(-) (limited to 'absl/strings/escaping.cc') diff --git a/absl/strings/escaping.cc b/absl/strings/escaping.cc index 0d336e3f..88390fbf 100644 --- a/absl/strings/escaping.cc +++ b/absl/strings/escaping.cc @@ -35,27 +35,6 @@ namespace absl { namespace { -// Digit conversion. -constexpr char kHexChar[] = "0123456789abcdef"; - -constexpr char kHexTable[513] = - "000102030405060708090a0b0c0d0e0f" - "101112131415161718191a1b1c1d1e1f" - "202122232425262728292a2b2c2d2e2f" - "303132333435363738393a3b3c3d3e3f" - "404142434445464748494a4b4c4d4e4f" - "505152535455565758595a5b5c5d5e5f" - "606162636465666768696a6b6c6d6e6f" - "707172737475767778797a7b7c7d7e7f" - "808182838485868788898a8b8c8d8e8f" - "909192939495969798999a9b9c9d9e9f" - "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf" - "b0b1b2b3b4b5b6b7b8b9babbbcbdbebf" - "c0c1c2c3c4c5c6c7c8c9cacbcccdcecf" - "d0d1d2d3d4d5d6d7d8d9dadbdcdddedf" - "e0e1e2e3e4e5e6e7e8e9eaebecedeeef" - "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff"; - // These are used for the leave_nulls_escaped argument to CUnescapeInternal(). constexpr bool kUnescapeNulls = false; @@ -348,14 +327,14 @@ std::string CEscapeInternal(absl::string_view src, bool use_hex, (last_hex_escape && absl::ascii_isxdigit(c)))) { if (use_hex) { dest.append("\\" "x"); - dest.push_back(kHexChar[c / 16]); - dest.push_back(kHexChar[c % 16]); + dest.push_back(numbers_internal::kHexChar[c / 16]); + dest.push_back(numbers_internal::kHexChar[c % 16]); is_hex_escape = true; } else { dest.append("\\"); - dest.push_back(kHexChar[c / 64]); - dest.push_back(kHexChar[(c % 64) / 8]); - dest.push_back(kHexChar[c % 8]); + dest.push_back(numbers_internal::kHexChar[c / 64]); + dest.push_back(numbers_internal::kHexChar[(c % 64) / 8]); + dest.push_back(numbers_internal::kHexChar[c % 8]); } } else { dest.push_back(c); @@ -1019,7 +998,7 @@ template void BytesToHexStringInternal(const unsigned char* src, T dest, ptrdiff_t num) { auto dest_ptr = &dest[0]; for (auto src_ptr = src; src_ptr != (src + num); ++src_ptr, dest_ptr += 2) { - const char* hex_p = &kHexTable[*src_ptr * 2]; + const char* hex_p = &numbers_internal::kHexTable[*src_ptr * 2]; std::copy(hex_p, hex_p + 2, dest_ptr); } } -- cgit v1.2.3