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Export of internal Abseil changes.

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2dcf3ec79f961d2962cdad33ac4bfbcb14126dad by Abseil Team <absl-team@google.com>:

Consolidate implementations of CountLeadingZeros and add new ones for
CountTrailingZeros.
Internal APIs only.

PiperOrigin-RevId: 209961247

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4f3ac87c6928dab26faff962bb18aade9383f184 by Jorg Brown <jorg@google.com>:

Fix absl::CUnescape not to write to const_cast<char*>(str->data()), which does the wrong thing if the string type is copy-on-write

PiperOrigin-RevId: 209957656

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c5103067be19dc88a4c32e5306154e5e3bba4673 by Tom Manshreck <shreck@google.com>:

Update comments in time library header files.

PiperOrigin-RevId: 209829588

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fe36f9b6150243d2ac88e2a892d84c565c18cd2f by Abseil Team <absl-team@google.com>:

Clarifying the sample use of absl::LoadTimeZone function in the documentation.

PiperOrigin-RevId: 209782218
GitOrigin-RevId: 2dcf3ec79f961d2962cdad33ac4bfbcb14126dad
Change-Id: I3e2f87a8c543599b81eada58409a9bddc0b51ab8
This commit is contained in:
Abseil Team 2018-08-23 10:41:14 -07:00 • committed by Derek Mauro
parent bed5bd6e18
commit 5e7d459eec
11 changed files with 345 additions and 69 deletions
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8
absl/strings/charconv.cc
View file

@ -20,8 +20,8 @@
#include <cstring>
#include "absl/base/casts.h"
#include "absl/base/internal/bits.h"
#include "absl/numeric/int128.h"
#include "absl/strings/internal/bits.h"
#include "absl/strings/internal/charconv_bigint.h"
#include "absl/strings/internal/charconv_parse.h"
@ -243,9 +243,9 @@ struct CalculatedFloat {
// minus the number of leading zero bits.)
int BitWidth(uint128 value) {
if (Uint128High64(value) == 0) {
return 64 - strings_internal::CountLeadingZeros64(Uint128Low64(value));
return 64 - base_internal::CountLeadingZeros64(Uint128Low64(value));
}
return 128 - strings_internal::CountLeadingZeros64(Uint128High64(value));
return 128 - base_internal::CountLeadingZeros64(Uint128High64(value));
}
// Calculates how far to the right a mantissa needs to be shifted to create a
@ -518,7 +518,7 @@ CalculatedFloat CalculateFromParsedHexadecimal(
const strings_internal::ParsedFloat& parsed_hex) {
uint64_t mantissa = parsed_hex.mantissa;
int exponent = parsed_hex.exponent;
int mantissa_width = 64 - strings_internal::CountLeadingZeros64(mantissa);
int mantissa_width = 64 - base_internal::CountLeadingZeros64(mantissa);
const int shift = NormalizedShiftSize<FloatType>(mantissa_width, exponent);
bool result_exact;
exponent += shift;