4491d606df
-- 70f43a482d7d4ae4a255f17ca02b0106653dd600 by Shaindel Schwartz <shaindel@google.com>: Internal change PiperOrigin-RevId: 201571193 -- 93e6e9c2e683158be49d9dd1f5cb1a91d0c0f556 by Abseil Team <absl-team@google.com>: Internal change. PiperOrigin-RevId: 201567108 -- fbd8ee94fbe9f2448e5adf5e88706f9c8216048f by Juemin Yang <jueminyang@google.com>: str_format release PiperOrigin-RevId: 201565129 -- 387faa301555a8a888c4429df52734aa806dca46 by Abseil Team <absl-team@google.com>: Adds a defaulted allocator parameter to the size_type constructor of InlinedVector PiperOrigin-RevId: 201558711 -- 39b15ea2c68d7129d70cbde7e71af900032595ec by Matt Calabrese <calabrese@google.com>: Update the variant implementation to eliminate unnecessary checking on alternative access when the index is known or required to be correct. PiperOrigin-RevId: 201529535 -- adab77f1f7bb363aa534297f22aae2b0f08889ea by Abseil Team <absl-team@google.com>: Import of CCTZ from GitHub. PiperOrigin-RevId: 201458388 -- a701dc0ba62e3cadf0de14203415b91df4ee8151 by Greg Falcon <gfalcon@google.com>: Internal cleanup PiperOrigin-RevId: 201394836 -- 8a7191410b8f440fdfa27f722ff05e451502ab61 by Abseil Team <absl-team@google.com>: Import of CCTZ from GitHub. PiperOrigin-RevId: 201369269 GitOrigin-RevId: 70f43a482d7d4ae4a255f17ca02b0106653dd600 Change-Id: I8ab073b30b4e27405a3b6da2c826bb4f3f0b9af6
101 lines
2.9 KiB
C++
101 lines
2.9 KiB
C++
// Copyright 2017 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Output extension hooks for the Format library.
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// `internal::InvokeFlush` calls the appropriate flush function for the
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// specified output argument.
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// `BufferRawSink` is a simple output sink for a char buffer. Used by SnprintF.
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// `FILERawSink` is a std::FILE* based sink. Used by PrintF and FprintF.
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#ifndef ABSL_STRINGS_INTERNAL_STR_FORMAT_OUTPUT_H_
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#define ABSL_STRINGS_INTERNAL_STR_FORMAT_OUTPUT_H_
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#include <cstdio>
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#include <ostream>
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#include <string>
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#include "absl/base/port.h"
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#include "absl/strings/string_view.h"
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class Cord;
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namespace absl {
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namespace str_format_internal {
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// RawSink implementation that writes into a char* buffer.
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// It will not overflow the buffer, but will keep the total count of chars
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// that would have been written.
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class BufferRawSink {
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public:
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BufferRawSink(char* buffer, size_t size) : buffer_(buffer), size_(size) {}
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size_t total_written() const { return total_written_; }
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void Write(string_view v);
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private:
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char* buffer_;
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size_t size_;
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size_t total_written_ = 0;
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};
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// RawSink implementation that writes into a FILE*.
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// It keeps track of the total number of bytes written and any error encountered
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// during the writes.
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class FILERawSink {
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public:
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explicit FILERawSink(std::FILE* output) : output_(output) {}
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void Write(string_view v);
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size_t count() const { return count_; }
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int error() const { return error_; }
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private:
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std::FILE* output_;
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int error_ = 0;
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size_t count_ = 0;
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};
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// Provide RawSink integration with common types from the STL.
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inline void AbslFormatFlush(std::string* out, string_view s) {
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out->append(s.begin(), s.size());
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}
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inline void AbslFormatFlush(std::ostream* out, string_view s) {
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out->write(s.begin(), s.size());
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}
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template <class AbslCord, typename = typename std::enable_if<
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std::is_same<AbslCord, ::Cord>::value>::type>
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inline void AbslFormatFlush(AbslCord* out, string_view s) {
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out->Append(s);
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}
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inline void AbslFormatFlush(FILERawSink* sink, string_view v) {
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sink->Write(v);
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}
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inline void AbslFormatFlush(BufferRawSink* sink, string_view v) {
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sink->Write(v);
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}
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template <typename T>
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auto InvokeFlush(T* out, string_view s)
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-> decltype(str_format_internal::AbslFormatFlush(out, s)) {
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str_format_internal::AbslFormatFlush(out, s);
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}
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} // namespace str_format_internal
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} // namespace absl
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#endif // ABSL_STRINGS_INTERNAL_STR_FORMAT_OUTPUT_H_
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