77f87009a3
-- d8ddeda8e52132b908fae89b25f117a055d78c04 by Abseil Team <absl-team@google.com>: Improve performance of ByteStringFromAscii by changing kHexValue to have -1 in invalid value slots. This way a single load can do both the validation and conversion. PiperOrigin-RevId: 284167344 -- 5037e97e2eaaac8ced9a5290949deda4b43b9ceb by Mark Barolak <mbar@google.com>: Change the underlying symbol name of Cord to absl::Cord. PiperOrigin-RevId: 284005429 -- 4ef66c72aedf135f2b4fd0ba7a73de6642decfff by Abseil Team <absl-team@google.com>: Eliminate an unnecessary load when futex is contended in Waiter::Wait() The first argument to compare_exchange_weak() is a reference and will be updated upon failure. There is no need to do an additional load on the same variable. PiperOrigin-RevId: 284002752 GitOrigin-RevId: d8ddeda8e52132b908fae89b25f117a055d78c04 Change-Id: Idac68a1901eb8c30050adc3860765b1a6fa085c7
102 lines
2.9 KiB
C++
102 lines
2.9 KiB
C++
// Copyright 2017 The Abseil Authors.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
//
|
|
// Output extension hooks for the Format library.
|
|
// `internal::InvokeFlush` calls the appropriate flush function for the
|
|
// specified output argument.
|
|
// `BufferRawSink` is a simple output sink for a char buffer. Used by SnprintF.
|
|
// `FILERawSink` is a std::FILE* based sink. Used by PrintF and FprintF.
|
|
|
|
#ifndef ABSL_STRINGS_INTERNAL_STR_FORMAT_OUTPUT_H_
|
|
#define ABSL_STRINGS_INTERNAL_STR_FORMAT_OUTPUT_H_
|
|
|
|
#include <cstdio>
|
|
#include <ostream>
|
|
#include <string>
|
|
|
|
#include "absl/base/port.h"
|
|
#include "absl/strings/string_view.h"
|
|
|
|
namespace absl {
|
|
|
|
class Cord;
|
|
|
|
namespace str_format_internal {
|
|
|
|
// RawSink implementation that writes into a char* buffer.
|
|
// It will not overflow the buffer, but will keep the total count of chars
|
|
// that would have been written.
|
|
class BufferRawSink {
|
|
public:
|
|
BufferRawSink(char* buffer, size_t size) : buffer_(buffer), size_(size) {}
|
|
|
|
size_t total_written() const { return total_written_; }
|
|
void Write(string_view v);
|
|
|
|
private:
|
|
char* buffer_;
|
|
size_t size_;
|
|
size_t total_written_ = 0;
|
|
};
|
|
|
|
// RawSink implementation that writes into a FILE*.
|
|
// It keeps track of the total number of bytes written and any error encountered
|
|
// during the writes.
|
|
class FILERawSink {
|
|
public:
|
|
explicit FILERawSink(std::FILE* output) : output_(output) {}
|
|
|
|
void Write(string_view v);
|
|
|
|
size_t count() const { return count_; }
|
|
int error() const { return error_; }
|
|
|
|
private:
|
|
std::FILE* output_;
|
|
int error_ = 0;
|
|
size_t count_ = 0;
|
|
};
|
|
|
|
// Provide RawSink integration with common types from the STL.
|
|
inline void AbslFormatFlush(std::string* out, string_view s) {
|
|
out->append(s.data(), s.size());
|
|
}
|
|
inline void AbslFormatFlush(std::ostream* out, string_view s) {
|
|
out->write(s.data(), s.size());
|
|
}
|
|
|
|
template <class AbslCord, typename = typename std::enable_if<
|
|
std::is_same<AbslCord, absl::Cord>::value>::type>
|
|
inline void AbslFormatFlush(AbslCord* out, string_view s) {
|
|
out->Append(s);
|
|
}
|
|
|
|
inline void AbslFormatFlush(FILERawSink* sink, string_view v) {
|
|
sink->Write(v);
|
|
}
|
|
|
|
inline void AbslFormatFlush(BufferRawSink* sink, string_view v) {
|
|
sink->Write(v);
|
|
}
|
|
|
|
template <typename T>
|
|
auto InvokeFlush(T* out, string_view s)
|
|
-> decltype(str_format_internal::AbslFormatFlush(out, s)) {
|
|
str_format_internal::AbslFormatFlush(out, s);
|
|
}
|
|
|
|
} // namespace str_format_internal
|
|
} // namespace absl
|
|
|
|
#endif // ABSL_STRINGS_INTERNAL_STR_FORMAT_OUTPUT_H_
|