forked from OSchip/llvm-project
947 lines
29 KiB
C++
947 lines
29 KiB
C++
//===--- raw_ostream.cpp - Implement the raw_ostream classes --------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This implements support for bulk buffered stream output.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Config/config.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/FormatVariadic.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/NativeFormatting.h"
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#include "llvm/Support/Process.h"
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#include "llvm/Support/Program.h"
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#include <algorithm>
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#include <cctype>
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#include <cerrno>
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#include <cstdio>
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#include <iterator>
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#include <sys/stat.h>
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#include <system_error>
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// <fcntl.h> may provide O_BINARY.
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#if defined(HAVE_FCNTL_H)
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# include <fcntl.h>
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#endif
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#if defined(HAVE_UNISTD_H)
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# include <unistd.h>
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#endif
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#if defined(__CYGWIN__)
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#include <io.h>
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#endif
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#if defined(_MSC_VER)
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#include <io.h>
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#ifndef STDIN_FILENO
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# define STDIN_FILENO 0
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#endif
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#ifndef STDOUT_FILENO
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# define STDOUT_FILENO 1
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#endif
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#ifndef STDERR_FILENO
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# define STDERR_FILENO 2
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#endif
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#endif
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#ifdef _WIN32
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#include "llvm/Support/ConvertUTF.h"
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#include "Windows/WindowsSupport.h"
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#endif
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using namespace llvm;
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const raw_ostream::Colors raw_ostream::BLACK;
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const raw_ostream::Colors raw_ostream::RED;
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const raw_ostream::Colors raw_ostream::GREEN;
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const raw_ostream::Colors raw_ostream::YELLOW;
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const raw_ostream::Colors raw_ostream::BLUE;
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const raw_ostream::Colors raw_ostream::MAGENTA;
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const raw_ostream::Colors raw_ostream::CYAN;
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const raw_ostream::Colors raw_ostream::WHITE;
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const raw_ostream::Colors raw_ostream::SAVEDCOLOR;
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const raw_ostream::Colors raw_ostream::RESET;
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raw_ostream::~raw_ostream() {
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// raw_ostream's subclasses should take care to flush the buffer
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// in their destructors.
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assert(OutBufCur == OutBufStart &&
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"raw_ostream destructor called with non-empty buffer!");
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if (BufferMode == InternalBuffer)
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delete [] OutBufStart;
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}
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size_t raw_ostream::preferred_buffer_size() const {
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// BUFSIZ is intended to be a reasonable default.
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return BUFSIZ;
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}
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void raw_ostream::SetBuffered() {
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// Ask the subclass to determine an appropriate buffer size.
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if (size_t Size = preferred_buffer_size())
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SetBufferSize(Size);
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else
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// It may return 0, meaning this stream should be unbuffered.
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SetUnbuffered();
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}
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void raw_ostream::SetBufferAndMode(char *BufferStart, size_t Size,
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BufferKind Mode) {
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assert(((Mode == Unbuffered && !BufferStart && Size == 0) ||
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(Mode != Unbuffered && BufferStart && Size != 0)) &&
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"stream must be unbuffered or have at least one byte");
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// Make sure the current buffer is free of content (we can't flush here; the
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// child buffer management logic will be in write_impl).
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assert(GetNumBytesInBuffer() == 0 && "Current buffer is non-empty!");
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if (BufferMode == InternalBuffer)
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delete [] OutBufStart;
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OutBufStart = BufferStart;
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OutBufEnd = OutBufStart+Size;
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OutBufCur = OutBufStart;
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BufferMode = Mode;
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assert(OutBufStart <= OutBufEnd && "Invalid size!");
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}
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raw_ostream &raw_ostream::operator<<(unsigned long N) {
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write_integer(*this, static_cast<uint64_t>(N), 0, IntegerStyle::Integer);
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return *this;
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}
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raw_ostream &raw_ostream::operator<<(long N) {
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write_integer(*this, static_cast<int64_t>(N), 0, IntegerStyle::Integer);
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return *this;
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}
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raw_ostream &raw_ostream::operator<<(unsigned long long N) {
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write_integer(*this, static_cast<uint64_t>(N), 0, IntegerStyle::Integer);
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return *this;
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}
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raw_ostream &raw_ostream::operator<<(long long N) {
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write_integer(*this, static_cast<int64_t>(N), 0, IntegerStyle::Integer);
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return *this;
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}
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raw_ostream &raw_ostream::write_hex(unsigned long long N) {
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llvm::write_hex(*this, N, HexPrintStyle::Lower);
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return *this;
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}
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raw_ostream &raw_ostream::operator<<(Colors C) {
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if (C == Colors::RESET)
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resetColor();
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else
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changeColor(C);
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return *this;
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}
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raw_ostream &raw_ostream::write_uuid(const uuid_t UUID) {
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for (int Idx = 0; Idx < 16; ++Idx) {
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*this << format("%02" PRIX32, UUID[Idx]);
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if (Idx == 3 || Idx == 5 || Idx == 7 || Idx == 9)
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*this << "-";
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}
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return *this;
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}
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raw_ostream &raw_ostream::write_escaped(StringRef Str,
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bool UseHexEscapes) {
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for (unsigned char c : Str) {
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switch (c) {
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case '\\':
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*this << '\\' << '\\';
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break;
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case '\t':
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*this << '\\' << 't';
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break;
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case '\n':
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*this << '\\' << 'n';
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break;
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case '"':
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*this << '\\' << '"';
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break;
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default:
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if (isPrint(c)) {
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*this << c;
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break;
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}
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// Write out the escaped representation.
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if (UseHexEscapes) {
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*this << '\\' << 'x';
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*this << hexdigit((c >> 4 & 0xF));
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*this << hexdigit((c >> 0) & 0xF);
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} else {
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// Always use a full 3-character octal escape.
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*this << '\\';
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*this << char('0' + ((c >> 6) & 7));
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*this << char('0' + ((c >> 3) & 7));
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*this << char('0' + ((c >> 0) & 7));
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}
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}
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}
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return *this;
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}
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raw_ostream &raw_ostream::operator<<(const void *P) {
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llvm::write_hex(*this, (uintptr_t)P, HexPrintStyle::PrefixLower);
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return *this;
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}
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raw_ostream &raw_ostream::operator<<(double N) {
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llvm::write_double(*this, N, FloatStyle::Exponent);
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return *this;
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}
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void raw_ostream::flush_nonempty() {
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assert(OutBufCur > OutBufStart && "Invalid call to flush_nonempty.");
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size_t Length = OutBufCur - OutBufStart;
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OutBufCur = OutBufStart;
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write_impl(OutBufStart, Length);
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}
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raw_ostream &raw_ostream::write(unsigned char C) {
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// Group exceptional cases into a single branch.
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if (LLVM_UNLIKELY(OutBufCur >= OutBufEnd)) {
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if (LLVM_UNLIKELY(!OutBufStart)) {
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if (BufferMode == Unbuffered) {
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write_impl(reinterpret_cast<char*>(&C), 1);
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return *this;
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}
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// Set up a buffer and start over.
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SetBuffered();
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return write(C);
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}
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flush_nonempty();
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}
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*OutBufCur++ = C;
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return *this;
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}
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raw_ostream &raw_ostream::write(const char *Ptr, size_t Size) {
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// Group exceptional cases into a single branch.
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if (LLVM_UNLIKELY(size_t(OutBufEnd - OutBufCur) < Size)) {
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if (LLVM_UNLIKELY(!OutBufStart)) {
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if (BufferMode == Unbuffered) {
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write_impl(Ptr, Size);
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return *this;
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}
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// Set up a buffer and start over.
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SetBuffered();
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return write(Ptr, Size);
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}
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size_t NumBytes = OutBufEnd - OutBufCur;
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// If the buffer is empty at this point we have a string that is larger
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// than the buffer. Directly write the chunk that is a multiple of the
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// preferred buffer size and put the remainder in the buffer.
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if (LLVM_UNLIKELY(OutBufCur == OutBufStart)) {
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assert(NumBytes != 0 && "undefined behavior");
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size_t BytesToWrite = Size - (Size % NumBytes);
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write_impl(Ptr, BytesToWrite);
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size_t BytesRemaining = Size - BytesToWrite;
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if (BytesRemaining > size_t(OutBufEnd - OutBufCur)) {
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// Too much left over to copy into our buffer.
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return write(Ptr + BytesToWrite, BytesRemaining);
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}
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copy_to_buffer(Ptr + BytesToWrite, BytesRemaining);
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return *this;
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}
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// We don't have enough space in the buffer to fit the string in. Insert as
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// much as possible, flush and start over with the remainder.
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copy_to_buffer(Ptr, NumBytes);
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flush_nonempty();
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return write(Ptr + NumBytes, Size - NumBytes);
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}
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copy_to_buffer(Ptr, Size);
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return *this;
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}
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void raw_ostream::copy_to_buffer(const char *Ptr, size_t Size) {
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assert(Size <= size_t(OutBufEnd - OutBufCur) && "Buffer overrun!");
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// Handle short strings specially, memcpy isn't very good at very short
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// strings.
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switch (Size) {
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case 4: OutBufCur[3] = Ptr[3]; LLVM_FALLTHROUGH;
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case 3: OutBufCur[2] = Ptr[2]; LLVM_FALLTHROUGH;
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case 2: OutBufCur[1] = Ptr[1]; LLVM_FALLTHROUGH;
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case 1: OutBufCur[0] = Ptr[0]; LLVM_FALLTHROUGH;
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case 0: break;
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default:
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memcpy(OutBufCur, Ptr, Size);
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break;
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}
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OutBufCur += Size;
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}
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// Formatted output.
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raw_ostream &raw_ostream::operator<<(const format_object_base &Fmt) {
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// If we have more than a few bytes left in our output buffer, try
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// formatting directly onto its end.
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size_t NextBufferSize = 127;
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size_t BufferBytesLeft = OutBufEnd - OutBufCur;
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if (BufferBytesLeft > 3) {
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size_t BytesUsed = Fmt.print(OutBufCur, BufferBytesLeft);
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// Common case is that we have plenty of space.
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if (BytesUsed <= BufferBytesLeft) {
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OutBufCur += BytesUsed;
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return *this;
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}
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// Otherwise, we overflowed and the return value tells us the size to try
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// again with.
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NextBufferSize = BytesUsed;
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}
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// If we got here, we didn't have enough space in the output buffer for the
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// string. Try printing into a SmallVector that is resized to have enough
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// space. Iterate until we win.
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SmallVector<char, 128> V;
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while (true) {
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V.resize(NextBufferSize);
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// Try formatting into the SmallVector.
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size_t BytesUsed = Fmt.print(V.data(), NextBufferSize);
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// If BytesUsed fit into the vector, we win.
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if (BytesUsed <= NextBufferSize)
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return write(V.data(), BytesUsed);
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// Otherwise, try again with a new size.
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assert(BytesUsed > NextBufferSize && "Didn't grow buffer!?");
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NextBufferSize = BytesUsed;
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}
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}
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raw_ostream &raw_ostream::operator<<(const formatv_object_base &Obj) {
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SmallString<128> S;
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Obj.format(*this);
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return *this;
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}
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raw_ostream &raw_ostream::operator<<(const FormattedString &FS) {
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if (FS.Str.size() >= FS.Width || FS.Justify == FormattedString::JustifyNone) {
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this->operator<<(FS.Str);
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return *this;
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}
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const size_t Difference = FS.Width - FS.Str.size();
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switch (FS.Justify) {
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case FormattedString::JustifyLeft:
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this->operator<<(FS.Str);
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this->indent(Difference);
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break;
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case FormattedString::JustifyRight:
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this->indent(Difference);
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this->operator<<(FS.Str);
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break;
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case FormattedString::JustifyCenter: {
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int PadAmount = Difference / 2;
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this->indent(PadAmount);
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this->operator<<(FS.Str);
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this->indent(Difference - PadAmount);
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break;
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}
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default:
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llvm_unreachable("Bad Justification");
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}
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return *this;
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}
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raw_ostream &raw_ostream::operator<<(const FormattedNumber &FN) {
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if (FN.Hex) {
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HexPrintStyle Style;
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if (FN.Upper && FN.HexPrefix)
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Style = HexPrintStyle::PrefixUpper;
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else if (FN.Upper && !FN.HexPrefix)
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Style = HexPrintStyle::Upper;
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else if (!FN.Upper && FN.HexPrefix)
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Style = HexPrintStyle::PrefixLower;
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else
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Style = HexPrintStyle::Lower;
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llvm::write_hex(*this, FN.HexValue, Style, FN.Width);
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} else {
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llvm::SmallString<16> Buffer;
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llvm::raw_svector_ostream Stream(Buffer);
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llvm::write_integer(Stream, FN.DecValue, 0, IntegerStyle::Integer);
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if (Buffer.size() < FN.Width)
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indent(FN.Width - Buffer.size());
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(*this) << Buffer;
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}
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return *this;
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}
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raw_ostream &raw_ostream::operator<<(const FormattedBytes &FB) {
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if (FB.Bytes.empty())
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return *this;
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size_t LineIndex = 0;
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auto Bytes = FB.Bytes;
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const size_t Size = Bytes.size();
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HexPrintStyle HPS = FB.Upper ? HexPrintStyle::Upper : HexPrintStyle::Lower;
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uint64_t OffsetWidth = 0;
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if (FB.FirstByteOffset.hasValue()) {
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// Figure out how many nibbles are needed to print the largest offset
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// represented by this data set, so that we can align the offset field
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// to the right width.
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size_t Lines = Size / FB.NumPerLine;
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uint64_t MaxOffset = *FB.FirstByteOffset + Lines * FB.NumPerLine;
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unsigned Power = 0;
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if (MaxOffset > 0)
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Power = llvm::Log2_64_Ceil(MaxOffset);
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OffsetWidth = std::max<uint64_t>(4, llvm::alignTo(Power, 4) / 4);
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}
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// The width of a block of data including all spaces for group separators.
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unsigned NumByteGroups =
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alignTo(FB.NumPerLine, FB.ByteGroupSize) / FB.ByteGroupSize;
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unsigned BlockCharWidth = FB.NumPerLine * 2 + NumByteGroups - 1;
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while (!Bytes.empty()) {
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indent(FB.IndentLevel);
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if (FB.FirstByteOffset.hasValue()) {
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uint64_t Offset = FB.FirstByteOffset.getValue();
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llvm::write_hex(*this, Offset + LineIndex, HPS, OffsetWidth);
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*this << ": ";
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}
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auto Line = Bytes.take_front(FB.NumPerLine);
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size_t CharsPrinted = 0;
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// Print the hex bytes for this line in groups
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for (size_t I = 0; I < Line.size(); ++I, CharsPrinted += 2) {
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if (I && (I % FB.ByteGroupSize) == 0) {
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++CharsPrinted;
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*this << " ";
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}
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llvm::write_hex(*this, Line[I], HPS, 2);
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}
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if (FB.ASCII) {
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// Print any spaces needed for any bytes that we didn't print on this
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// line so that the ASCII bytes are correctly aligned.
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assert(BlockCharWidth >= CharsPrinted);
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indent(BlockCharWidth - CharsPrinted + 2);
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*this << "|";
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// Print the ASCII char values for each byte on this line
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for (uint8_t Byte : Line) {
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if (isPrint(Byte))
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*this << static_cast<char>(Byte);
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else
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*this << '.';
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}
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*this << '|';
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}
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Bytes = Bytes.drop_front(Line.size());
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LineIndex += Line.size();
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if (LineIndex < Size)
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*this << '\n';
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}
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return *this;
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}
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template <char C>
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static raw_ostream &write_padding(raw_ostream &OS, unsigned NumChars) {
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static const char Chars[] = {C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, C,
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C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, C,
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C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, C,
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C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, C,
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C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, C};
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// Usually the indentation is small, handle it with a fastpath.
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if (NumChars < array_lengthof(Chars))
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return OS.write(Chars, NumChars);
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while (NumChars) {
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unsigned NumToWrite = std::min(NumChars,
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(unsigned)array_lengthof(Chars)-1);
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OS.write(Chars, NumToWrite);
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NumChars -= NumToWrite;
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}
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return OS;
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}
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/// indent - Insert 'NumSpaces' spaces.
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raw_ostream &raw_ostream::indent(unsigned NumSpaces) {
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return write_padding<' '>(*this, NumSpaces);
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}
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/// write_zeros - Insert 'NumZeros' nulls.
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raw_ostream &raw_ostream::write_zeros(unsigned NumZeros) {
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return write_padding<'\0'>(*this, NumZeros);
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}
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void raw_ostream::anchor() {}
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//===----------------------------------------------------------------------===//
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// Formatted Output
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//===----------------------------------------------------------------------===//
|
|
|
|
// Out of line virtual method.
|
|
void format_object_base::home() {
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// raw_fd_ostream
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
static int getFD(StringRef Filename, std::error_code &EC,
|
|
sys::fs::CreationDisposition Disp, sys::fs::FileAccess Access,
|
|
sys::fs::OpenFlags Flags) {
|
|
assert((Access & sys::fs::FA_Write) &&
|
|
"Cannot make a raw_ostream from a read-only descriptor!");
|
|
|
|
// Handle "-" as stdout. Note that when we do this, we consider ourself
|
|
// the owner of stdout and may set the "binary" flag globally based on Flags.
|
|
if (Filename == "-") {
|
|
EC = std::error_code();
|
|
// If user requested binary then put stdout into binary mode if
|
|
// possible.
|
|
if (!(Flags & sys::fs::OF_Text))
|
|
sys::ChangeStdoutToBinary();
|
|
return STDOUT_FILENO;
|
|
}
|
|
|
|
int FD;
|
|
if (Access & sys::fs::FA_Read)
|
|
EC = sys::fs::openFileForReadWrite(Filename, FD, Disp, Flags);
|
|
else
|
|
EC = sys::fs::openFileForWrite(Filename, FD, Disp, Flags);
|
|
if (EC)
|
|
return -1;
|
|
|
|
return FD;
|
|
}
|
|
|
|
raw_fd_ostream::raw_fd_ostream(StringRef Filename, std::error_code &EC)
|
|
: raw_fd_ostream(Filename, EC, sys::fs::CD_CreateAlways, sys::fs::FA_Write,
|
|
sys::fs::OF_None) {}
|
|
|
|
raw_fd_ostream::raw_fd_ostream(StringRef Filename, std::error_code &EC,
|
|
sys::fs::CreationDisposition Disp)
|
|
: raw_fd_ostream(Filename, EC, Disp, sys::fs::FA_Write, sys::fs::OF_None) {}
|
|
|
|
raw_fd_ostream::raw_fd_ostream(StringRef Filename, std::error_code &EC,
|
|
sys::fs::FileAccess Access)
|
|
: raw_fd_ostream(Filename, EC, sys::fs::CD_CreateAlways, Access,
|
|
sys::fs::OF_None) {}
|
|
|
|
raw_fd_ostream::raw_fd_ostream(StringRef Filename, std::error_code &EC,
|
|
sys::fs::OpenFlags Flags)
|
|
: raw_fd_ostream(Filename, EC, sys::fs::CD_CreateAlways, sys::fs::FA_Write,
|
|
Flags) {}
|
|
|
|
raw_fd_ostream::raw_fd_ostream(StringRef Filename, std::error_code &EC,
|
|
sys::fs::CreationDisposition Disp,
|
|
sys::fs::FileAccess Access,
|
|
sys::fs::OpenFlags Flags)
|
|
: raw_fd_ostream(getFD(Filename, EC, Disp, Access, Flags), true) {}
|
|
|
|
/// FD is the file descriptor that this writes to. If ShouldClose is true, this
|
|
/// closes the file when the stream is destroyed.
|
|
raw_fd_ostream::raw_fd_ostream(int fd, bool shouldClose, bool unbuffered)
|
|
: raw_pwrite_stream(unbuffered), FD(fd), ShouldClose(shouldClose) {
|
|
if (FD < 0 ) {
|
|
ShouldClose = false;
|
|
return;
|
|
}
|
|
|
|
// Do not attempt to close stdout or stderr. We used to try to maintain the
|
|
// property that tools that support writing file to stdout should not also
|
|
// write informational output to stdout, but in practice we were never able to
|
|
// maintain this invariant. Many features have been added to LLVM and clang
|
|
// (-fdump-record-layouts, optimization remarks, etc) that print to stdout, so
|
|
// users must simply be aware that mixed output and remarks is a possibility.
|
|
if (FD <= STDERR_FILENO)
|
|
ShouldClose = false;
|
|
|
|
#ifdef _WIN32
|
|
// Check if this is a console device. This is not equivalent to isatty.
|
|
IsWindowsConsole =
|
|
::GetFileType((HANDLE)::_get_osfhandle(fd)) == FILE_TYPE_CHAR;
|
|
#endif
|
|
|
|
// Get the starting position.
|
|
off_t loc = ::lseek(FD, 0, SEEK_CUR);
|
|
#ifdef _WIN32
|
|
// MSVCRT's _lseek(SEEK_CUR) doesn't return -1 for pipes.
|
|
sys::fs::file_status Status;
|
|
std::error_code EC = status(FD, Status);
|
|
SupportsSeeking = !EC && Status.type() == sys::fs::file_type::regular_file;
|
|
#else
|
|
SupportsSeeking = loc != (off_t)-1;
|
|
#endif
|
|
if (!SupportsSeeking)
|
|
pos = 0;
|
|
else
|
|
pos = static_cast<uint64_t>(loc);
|
|
}
|
|
|
|
raw_fd_ostream::~raw_fd_ostream() {
|
|
if (FD >= 0) {
|
|
flush();
|
|
if (ShouldClose) {
|
|
if (auto EC = sys::Process::SafelyCloseFileDescriptor(FD))
|
|
error_detected(EC);
|
|
}
|
|
}
|
|
|
|
#ifdef __MINGW32__
|
|
// On mingw, global dtors should not call exit().
|
|
// report_fatal_error() invokes exit(). We know report_fatal_error()
|
|
// might not write messages to stderr when any errors were detected
|
|
// on FD == 2.
|
|
if (FD == 2) return;
|
|
#endif
|
|
|
|
// If there are any pending errors, report them now. Clients wishing
|
|
// to avoid report_fatal_error calls should check for errors with
|
|
// has_error() and clear the error flag with clear_error() before
|
|
// destructing raw_ostream objects which may have errors.
|
|
if (has_error())
|
|
report_fatal_error("IO failure on output stream: " + error().message(),
|
|
/*gen_crash_diag=*/false);
|
|
}
|
|
|
|
#if defined(_WIN32)
|
|
// The most reliable way to print unicode in a Windows console is with
|
|
// WriteConsoleW. To use that, first transcode from UTF-8 to UTF-16. This
|
|
// assumes that LLVM programs always print valid UTF-8 to the console. The data
|
|
// might not be UTF-8 for two major reasons:
|
|
// 1. The program is printing binary (-filetype=obj -o -), in which case it
|
|
// would have been gibberish anyway.
|
|
// 2. The program is printing text in a semi-ascii compatible codepage like
|
|
// shift-jis or cp1252.
|
|
//
|
|
// Most LLVM programs don't produce non-ascii text unless they are quoting
|
|
// user source input. A well-behaved LLVM program should either validate that
|
|
// the input is UTF-8 or transcode from the local codepage to UTF-8 before
|
|
// quoting it. If they don't, this may mess up the encoding, but this is still
|
|
// probably the best compromise we can make.
|
|
static bool write_console_impl(int FD, StringRef Data) {
|
|
SmallVector<wchar_t, 256> WideText;
|
|
|
|
// Fall back to ::write if it wasn't valid UTF-8.
|
|
if (auto EC = sys::windows::UTF8ToUTF16(Data, WideText))
|
|
return false;
|
|
|
|
// On Windows 7 and earlier, WriteConsoleW has a low maximum amount of data
|
|
// that can be written to the console at a time.
|
|
size_t MaxWriteSize = WideText.size();
|
|
if (!RunningWindows8OrGreater())
|
|
MaxWriteSize = 32767;
|
|
|
|
size_t WCharsWritten = 0;
|
|
do {
|
|
size_t WCharsToWrite =
|
|
std::min(MaxWriteSize, WideText.size() - WCharsWritten);
|
|
DWORD ActuallyWritten;
|
|
bool Success =
|
|
::WriteConsoleW((HANDLE)::_get_osfhandle(FD), &WideText[WCharsWritten],
|
|
WCharsToWrite, &ActuallyWritten,
|
|
/*Reserved=*/nullptr);
|
|
|
|
// The most likely reason for WriteConsoleW to fail is that FD no longer
|
|
// points to a console. Fall back to ::write. If this isn't the first loop
|
|
// iteration, something is truly wrong.
|
|
if (!Success)
|
|
return false;
|
|
|
|
WCharsWritten += ActuallyWritten;
|
|
} while (WCharsWritten != WideText.size());
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
void raw_fd_ostream::write_impl(const char *Ptr, size_t Size) {
|
|
assert(FD >= 0 && "File already closed.");
|
|
pos += Size;
|
|
|
|
#if defined(_WIN32)
|
|
// If this is a Windows console device, try re-encoding from UTF-8 to UTF-16
|
|
// and using WriteConsoleW. If that fails, fall back to plain write().
|
|
if (IsWindowsConsole)
|
|
if (write_console_impl(FD, StringRef(Ptr, Size)))
|
|
return;
|
|
#endif
|
|
|
|
// The maximum write size is limited to INT32_MAX. A write
|
|
// greater than SSIZE_MAX is implementation-defined in POSIX,
|
|
// and Windows _write requires 32 bit input.
|
|
size_t MaxWriteSize = INT32_MAX;
|
|
|
|
#if defined(__linux__)
|
|
// It is observed that Linux returns EINVAL for a very large write (>2G).
|
|
// Make it a reasonably small value.
|
|
MaxWriteSize = 1024 * 1024 * 1024;
|
|
#endif
|
|
|
|
do {
|
|
size_t ChunkSize = std::min(Size, MaxWriteSize);
|
|
ssize_t ret = ::write(FD, Ptr, ChunkSize);
|
|
|
|
if (ret < 0) {
|
|
// If it's a recoverable error, swallow it and retry the write.
|
|
//
|
|
// Ideally we wouldn't ever see EAGAIN or EWOULDBLOCK here, since
|
|
// raw_ostream isn't designed to do non-blocking I/O. However, some
|
|
// programs, such as old versions of bjam, have mistakenly used
|
|
// O_NONBLOCK. For compatibility, emulate blocking semantics by
|
|
// spinning until the write succeeds. If you don't want spinning,
|
|
// don't use O_NONBLOCK file descriptors with raw_ostream.
|
|
if (errno == EINTR || errno == EAGAIN
|
|
#ifdef EWOULDBLOCK
|
|
|| errno == EWOULDBLOCK
|
|
#endif
|
|
)
|
|
continue;
|
|
|
|
// Otherwise it's a non-recoverable error. Note it and quit.
|
|
error_detected(std::error_code(errno, std::generic_category()));
|
|
break;
|
|
}
|
|
|
|
// The write may have written some or all of the data. Update the
|
|
// size and buffer pointer to reflect the remainder that needs
|
|
// to be written. If there are no bytes left, we're done.
|
|
Ptr += ret;
|
|
Size -= ret;
|
|
} while (Size > 0);
|
|
}
|
|
|
|
void raw_fd_ostream::close() {
|
|
assert(ShouldClose);
|
|
ShouldClose = false;
|
|
flush();
|
|
if (auto EC = sys::Process::SafelyCloseFileDescriptor(FD))
|
|
error_detected(EC);
|
|
FD = -1;
|
|
}
|
|
|
|
uint64_t raw_fd_ostream::seek(uint64_t off) {
|
|
assert(SupportsSeeking && "Stream does not support seeking!");
|
|
flush();
|
|
#ifdef _WIN32
|
|
pos = ::_lseeki64(FD, off, SEEK_SET);
|
|
#elif defined(HAVE_LSEEK64)
|
|
pos = ::lseek64(FD, off, SEEK_SET);
|
|
#else
|
|
pos = ::lseek(FD, off, SEEK_SET);
|
|
#endif
|
|
if (pos == (uint64_t)-1)
|
|
error_detected(std::error_code(errno, std::generic_category()));
|
|
return pos;
|
|
}
|
|
|
|
void raw_fd_ostream::pwrite_impl(const char *Ptr, size_t Size,
|
|
uint64_t Offset) {
|
|
uint64_t Pos = tell();
|
|
seek(Offset);
|
|
write(Ptr, Size);
|
|
seek(Pos);
|
|
}
|
|
|
|
size_t raw_fd_ostream::preferred_buffer_size() const {
|
|
#if defined(_WIN32)
|
|
// Disable buffering for console devices. Console output is re-encoded from
|
|
// UTF-8 to UTF-16 on Windows, and buffering it would require us to split the
|
|
// buffer on a valid UTF-8 codepoint boundary. Terminal buffering is disabled
|
|
// below on most other OSs, so do the same thing on Windows and avoid that
|
|
// complexity.
|
|
if (IsWindowsConsole)
|
|
return 0;
|
|
return raw_ostream::preferred_buffer_size();
|
|
#elif !defined(__minix)
|
|
// Minix has no st_blksize.
|
|
assert(FD >= 0 && "File not yet open!");
|
|
struct stat statbuf;
|
|
if (fstat(FD, &statbuf) != 0)
|
|
return 0;
|
|
|
|
// If this is a terminal, don't use buffering. Line buffering
|
|
// would be a more traditional thing to do, but it's not worth
|
|
// the complexity.
|
|
if (S_ISCHR(statbuf.st_mode) && isatty(FD))
|
|
return 0;
|
|
// Return the preferred block size.
|
|
return statbuf.st_blksize;
|
|
#else
|
|
return raw_ostream::preferred_buffer_size();
|
|
#endif
|
|
}
|
|
|
|
raw_ostream &raw_fd_ostream::changeColor(enum Colors colors, bool bold,
|
|
bool bg) {
|
|
if (!ColorEnabled)
|
|
return *this;
|
|
|
|
if (sys::Process::ColorNeedsFlush())
|
|
flush();
|
|
const char *colorcode =
|
|
(colors == SAVEDCOLOR)
|
|
? sys::Process::OutputBold(bg)
|
|
: sys::Process::OutputColor(static_cast<char>(colors), bold, bg);
|
|
if (colorcode) {
|
|
size_t len = strlen(colorcode);
|
|
write(colorcode, len);
|
|
// don't account colors towards output characters
|
|
pos -= len;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
raw_ostream &raw_fd_ostream::resetColor() {
|
|
if (!ColorEnabled)
|
|
return *this;
|
|
|
|
if (sys::Process::ColorNeedsFlush())
|
|
flush();
|
|
const char *colorcode = sys::Process::ResetColor();
|
|
if (colorcode) {
|
|
size_t len = strlen(colorcode);
|
|
write(colorcode, len);
|
|
// don't account colors towards output characters
|
|
pos -= len;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
raw_ostream &raw_fd_ostream::reverseColor() {
|
|
if (!ColorEnabled)
|
|
return *this;
|
|
|
|
if (sys::Process::ColorNeedsFlush())
|
|
flush();
|
|
const char *colorcode = sys::Process::OutputReverse();
|
|
if (colorcode) {
|
|
size_t len = strlen(colorcode);
|
|
write(colorcode, len);
|
|
// don't account colors towards output characters
|
|
pos -= len;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
bool raw_fd_ostream::is_displayed() const {
|
|
return sys::Process::FileDescriptorIsDisplayed(FD);
|
|
}
|
|
|
|
bool raw_fd_ostream::has_colors() const {
|
|
return sys::Process::FileDescriptorHasColors(FD);
|
|
}
|
|
|
|
void raw_fd_ostream::anchor() {}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// outs(), errs(), nulls()
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// outs() - This returns a reference to a raw_ostream for standard output.
|
|
/// Use it like: outs() << "foo" << "bar";
|
|
raw_ostream &llvm::outs() {
|
|
// Set buffer settings to model stdout behavior.
|
|
std::error_code EC;
|
|
static raw_fd_ostream S("-", EC, sys::fs::OF_None);
|
|
assert(!EC);
|
|
return S;
|
|
}
|
|
|
|
/// errs() - This returns a reference to a raw_ostream for standard error.
|
|
/// Use it like: errs() << "foo" << "bar";
|
|
raw_ostream &llvm::errs() {
|
|
// Set standard error to be unbuffered by default.
|
|
static raw_fd_ostream S(STDERR_FILENO, false, true);
|
|
return S;
|
|
}
|
|
|
|
/// nulls() - This returns a reference to a raw_ostream which discards output.
|
|
raw_ostream &llvm::nulls() {
|
|
static raw_null_ostream S;
|
|
return S;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// raw_string_ostream
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
raw_string_ostream::~raw_string_ostream() {
|
|
flush();
|
|
}
|
|
|
|
void raw_string_ostream::write_impl(const char *Ptr, size_t Size) {
|
|
OS.append(Ptr, Size);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// raw_svector_ostream
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
uint64_t raw_svector_ostream::current_pos() const { return OS.size(); }
|
|
|
|
void raw_svector_ostream::write_impl(const char *Ptr, size_t Size) {
|
|
OS.append(Ptr, Ptr + Size);
|
|
}
|
|
|
|
void raw_svector_ostream::pwrite_impl(const char *Ptr, size_t Size,
|
|
uint64_t Offset) {
|
|
memcpy(OS.data() + Offset, Ptr, Size);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// raw_null_ostream
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
raw_null_ostream::~raw_null_ostream() {
|
|
#ifndef NDEBUG
|
|
// ~raw_ostream asserts that the buffer is empty. This isn't necessary
|
|
// with raw_null_ostream, but it's better to have raw_null_ostream follow
|
|
// the rules than to change the rules just for raw_null_ostream.
|
|
flush();
|
|
#endif
|
|
}
|
|
|
|
void raw_null_ostream::write_impl(const char *Ptr, size_t Size) {
|
|
}
|
|
|
|
uint64_t raw_null_ostream::current_pos() const {
|
|
return 0;
|
|
}
|
|
|
|
void raw_null_ostream::pwrite_impl(const char *Ptr, size_t Size,
|
|
uint64_t Offset) {}
|
|
|
|
void raw_pwrite_stream::anchor() {}
|
|
|
|
void buffer_ostream::anchor() {}
|