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authorStephen Hines <srhines@google.com>2019-07-02 16:25:20 -0700
committerAli B <abittin@gmail.com>2019-07-05 19:33:16 +0300
commit9afee4e65dc5f9f5eb371683729ff67b8df81d03 (patch)
tree4cf241d6c9044f91ee8c06e6920174d06f8de0b6 /clang-r353983e/include/llvm/Support/FormattedStream.h
parent2f19bd722c4c825320d1511c1ed83161b7f95d51 (diff)
Update prebuilt Clang to r353983e.HEADq10.0
clang 9.0.5 (based on r353983e) from build 5696680. Bug: http://b/135931688 Bug: http://b/136008926 Test: N/A Change-Id: I922d17410047d2e2df4625615352c588ee71b203
Diffstat (limited to 'clang-r353983e/include/llvm/Support/FormattedStream.h')
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1 files changed, 161 insertions, 0 deletions
diff --git a/clang-r353983e/include/llvm/Support/FormattedStream.h b/clang-r353983e/include/llvm/Support/FormattedStream.h
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+//===-- llvm/Support/FormattedStream.h - Formatted streams ------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains raw_ostream implementations for streams to do
+// things like pretty-print comments.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_FORMATTEDSTREAM_H
+#define LLVM_SUPPORT_FORMATTEDSTREAM_H
+
+#include "llvm/Support/raw_ostream.h"
+#include <utility>
+
+namespace llvm {
+
+/// formatted_raw_ostream - A raw_ostream that wraps another one and keeps track
+/// of line and column position, allowing padding out to specific column
+/// boundaries and querying the number of lines written to the stream.
+///
+class formatted_raw_ostream : public raw_ostream {
+ /// TheStream - The real stream we output to. We set it to be
+ /// unbuffered, since we're already doing our own buffering.
+ ///
+ raw_ostream *TheStream;
+
+ /// Position - The current output column and line of the data that's
+ /// been flushed and the portion of the buffer that's been
+ /// scanned. The line and column scheme is zero-based.
+ ///
+ std::pair<unsigned, unsigned> Position;
+
+ /// Scanned - This points to one past the last character in the
+ /// buffer we've scanned.
+ ///
+ const char *Scanned;
+
+ void write_impl(const char *Ptr, size_t Size) override;
+
+ /// current_pos - Return the current position within the stream,
+ /// not counting the bytes currently in the buffer.
+ uint64_t current_pos() const override {
+ // Our current position in the stream is all the contents which have been
+ // written to the underlying stream (*not* the current position of the
+ // underlying stream).
+ return TheStream->tell();
+ }
+
+ /// ComputePosition - Examine the given output buffer and figure out the new
+ /// position after output.
+ ///
+ void ComputePosition(const char *Ptr, size_t size);
+
+ void setStream(raw_ostream &Stream) {
+ releaseStream();
+
+ TheStream = &Stream;
+
+ // This formatted_raw_ostream inherits from raw_ostream, so it'll do its
+ // own buffering, and it doesn't need or want TheStream to do another
+ // layer of buffering underneath. Resize the buffer to what TheStream
+ // had been using, and tell TheStream not to do its own buffering.
+ if (size_t BufferSize = TheStream->GetBufferSize())
+ SetBufferSize(BufferSize);
+ else
+ SetUnbuffered();
+ TheStream->SetUnbuffered();
+
+ Scanned = nullptr;
+ }
+
+public:
+ /// formatted_raw_ostream - Open the specified file for
+ /// writing. If an error occurs, information about the error is
+ /// put into ErrorInfo, and the stream should be immediately
+ /// destroyed; the string will be empty if no error occurred.
+ ///
+ /// As a side effect, the given Stream is set to be Unbuffered.
+ /// This is because formatted_raw_ostream does its own buffering,
+ /// so it doesn't want another layer of buffering to be happening
+ /// underneath it.
+ ///
+ formatted_raw_ostream(raw_ostream &Stream)
+ : TheStream(nullptr), Position(0, 0) {
+ setStream(Stream);
+ }
+ explicit formatted_raw_ostream() : TheStream(nullptr), Position(0, 0) {
+ Scanned = nullptr;
+ }
+
+ ~formatted_raw_ostream() override {
+ flush();
+ releaseStream();
+ }
+
+ /// PadToColumn - Align the output to some column number. If the current
+ /// column is already equal to or more than NewCol, PadToColumn inserts one
+ /// space.
+ ///
+ /// \param NewCol - The column to move to.
+ formatted_raw_ostream &PadToColumn(unsigned NewCol);
+
+ /// getColumn - Return the column number
+ unsigned getColumn() { return Position.first; }
+
+ /// getLine - Return the line number
+ unsigned getLine() { return Position.second; }
+
+ raw_ostream &resetColor() override {
+ TheStream->resetColor();
+ return *this;
+ }
+
+ raw_ostream &reverseColor() override {
+ TheStream->reverseColor();
+ return *this;
+ }
+
+ raw_ostream &changeColor(enum Colors Color, bool Bold, bool BG) override {
+ TheStream->changeColor(Color, Bold, BG);
+ return *this;
+ }
+
+ bool is_displayed() const override {
+ return TheStream->is_displayed();
+ }
+
+private:
+ void releaseStream() {
+ // Transfer the buffer settings from this raw_ostream back to the underlying
+ // stream.
+ if (!TheStream)
+ return;
+ if (size_t BufferSize = GetBufferSize())
+ TheStream->SetBufferSize(BufferSize);
+ else
+ TheStream->SetUnbuffered();
+ }
+};
+
+/// fouts() - This returns a reference to a formatted_raw_ostream for
+/// standard output. Use it like: fouts() << "foo" << "bar";
+formatted_raw_ostream &fouts();
+
+/// ferrs() - This returns a reference to a formatted_raw_ostream for
+/// standard error. Use it like: ferrs() << "foo" << "bar";
+formatted_raw_ostream &ferrs();
+
+/// fdbgs() - This returns a reference to a formatted_raw_ostream for
+/// debug output. Use it like: fdbgs() << "foo" << "bar";
+formatted_raw_ostream &fdbgs();
+
+} // end llvm namespace
+
+
+#endif