//===----------------------------------------------------------------------===//
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Support/Format.h"
-#include "llvm/System/Program.h"
-#include "llvm/System/Process.h"
+#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringExtras.h"
#include "llvm/Config/config.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
-#include "llvm/System/Signals.h"
-#include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/Process.h"
+#include "llvm/Support/Program.h"
#include <cctype>
#include <cerrno>
#include <sys/stat.h>
-#include <sys/types.h>
+#include <system_error>
+
+// <fcntl.h> may provide O_BINARY.
+#if defined(HAVE_FCNTL_H)
+# include <fcntl.h>
+#endif
#if defined(HAVE_UNISTD_H)
# include <unistd.h>
#endif
-#if defined(HAVE_FCNTL_H)
-# include <fcntl.h>
+#if defined(HAVE_SYS_UIO_H) && defined(HAVE_WRITEV)
+# include <sys/uio.h>
+#endif
+
+#if defined(__CYGWIN__)
+#include <io.h>
#endif
#if defined(_MSC_VER)
#include <io.h>
-#include <fcntl.h>
#ifndef STDIN_FILENO
# define STDIN_FILENO 0
#endif
}
void raw_ostream::SetBufferAndMode(char *BufferStart, size_t Size,
- BufferKind Mode) {
- assert(((Mode == Unbuffered && BufferStart == 0 && Size == 0) ||
- (Mode != Unbuffered && BufferStart && Size)) &&
+ BufferKind Mode) {
+ assert(((Mode == Unbuffered && !BufferStart && Size == 0) ||
+ (Mode != Unbuffered && BufferStart && Size != 0)) &&
"stream must be unbuffered or have at least one byte");
// Make sure the current buffer is free of content (we can't flush here; the
// child buffer management logic will be in write_impl).
raw_ostream &raw_ostream::operator<<(long N) {
if (N < 0) {
*this << '-';
- N = -N;
+ // Avoid undefined behavior on LONG_MIN with a cast.
+ N = -(unsigned long)N;
}
return this->operator<<(static_cast<unsigned long>(N));
return write(CurPtr, EndPtr-CurPtr);
}
-raw_ostream &raw_ostream::write_escaped(StringRef Str) {
+raw_ostream &raw_ostream::write_escaped(StringRef Str,
+ bool UseHexEscapes) {
for (unsigned i = 0, e = Str.size(); i != e; ++i) {
unsigned char c = Str[i];
break;
}
- // Always expand to a 3-character octal escape.
- *this << '\\';
- *this << char('0' + ((c >> 6) & 7));
- *this << char('0' + ((c >> 3) & 7));
- *this << char('0' + ((c >> 0) & 7));
+ // Write out the escaped representation.
+ if (UseHexEscapes) {
+ *this << '\\' << 'x';
+ *this << hexdigit((c >> 4 & 0xF));
+ *this << hexdigit((c >> 0) & 0xF);
+ } else {
+ // Always use a full 3-character octal escape.
+ *this << '\\';
+ *this << char('0' + ((c >> 6) & 7));
+ *this << char('0' + ((c >> 3) & 7));
+ *this << char('0' + ((c >> 0) & 7));
+ }
}
}
}
raw_ostream &raw_ostream::operator<<(double N) {
+#ifdef _WIN32
+ // On MSVCRT and compatible, output of %e is incompatible to Posix
+ // by default. Number of exponent digits should be at least 2. "%+03d"
+ // FIXME: Implement our formatter to here or Support/Format.h!
+#if __cplusplus >= 201103L && defined(__MINGW32__)
+ // FIXME: It should be generic to C++11.
+ if (N == 0.0 && std::signbit(N))
+ return *this << "-0.000000e+00";
+#else
+ int fpcl = _fpclass(N);
+
+ // negative zero
+ if (fpcl == _FPCLASS_NZ)
+ return *this << "-0.000000e+00";
+#endif
+
+ char buf[16];
+ unsigned len;
+ len = format("%e", N).snprint(buf, sizeof(buf));
+ if (len <= sizeof(buf) - 2) {
+ if (len >= 5 && buf[len - 5] == 'e' && buf[len - 3] == '0') {
+ int cs = buf[len - 4];
+ if (cs == '+' || cs == '-') {
+ int c1 = buf[len - 2];
+ int c0 = buf[len - 1];
+ if (isdigit(static_cast<unsigned char>(c1)) &&
+ isdigit(static_cast<unsigned char>(c0))) {
+ // Trim leading '0': "...e+012" -> "...e+12\0"
+ buf[len - 3] = c1;
+ buf[len - 2] = c0;
+ buf[--len] = 0;
+ }
+ }
+ }
+ return this->operator<<(buf);
+ }
+#endif
return this->operator<<(format("%e", N));
}
raw_ostream &raw_ostream::write(unsigned char C) {
// Group exceptional cases into a single branch.
- if (BUILTIN_EXPECT(OutBufCur >= OutBufEnd, false)) {
- if (BUILTIN_EXPECT(!OutBufStart, false)) {
+ if (LLVM_UNLIKELY(OutBufCur >= OutBufEnd)) {
+ if (LLVM_UNLIKELY(!OutBufStart)) {
if (BufferMode == Unbuffered) {
write_impl(reinterpret_cast<char*>(&C), 1);
return *this;
raw_ostream &raw_ostream::write(const char *Ptr, size_t Size) {
// Group exceptional cases into a single branch.
- if (BUILTIN_EXPECT(OutBufCur+Size > OutBufEnd, false)) {
- if (BUILTIN_EXPECT(!OutBufStart, false)) {
+ if (LLVM_UNLIKELY(size_t(OutBufEnd - OutBufCur) < Size)) {
+ if (LLVM_UNLIKELY(!OutBufStart)) {
if (BufferMode == Unbuffered) {
write_impl(Ptr, Size);
return *this;
return write(Ptr, Size);
}
- // Write out the data in buffer-sized blocks until the remainder
- // fits within the buffer.
- do {
- size_t NumBytes = OutBufEnd - OutBufCur;
- copy_to_buffer(Ptr, NumBytes);
- flush_nonempty();
- Ptr += NumBytes;
- Size -= NumBytes;
- } while (OutBufCur+Size > OutBufEnd);
+ size_t NumBytes = OutBufEnd - OutBufCur;
+
+ // If the buffer is empty at this point we have a string that is larger
+ // than the buffer. Directly write the chunk that is a multiple of the
+ // preferred buffer size and put the remainder in the buffer.
+ if (LLVM_UNLIKELY(OutBufCur == OutBufStart)) {
+ assert(NumBytes != 0 && "undefined behavior");
+ size_t BytesToWrite = Size - (Size % NumBytes);
+ write_impl(Ptr, BytesToWrite);
+ size_t BytesRemaining = Size - BytesToWrite;
+ if (BytesRemaining > size_t(OutBufEnd - OutBufCur)) {
+ // Too much left over to copy into our buffer.
+ return write(Ptr + BytesToWrite, BytesRemaining);
+ }
+ copy_to_buffer(Ptr + BytesToWrite, BytesRemaining);
+ return *this;
+ }
+
+ // We don't have enough space in the buffer to fit the string in. Insert as
+ // much as possible, flush and start over with the remainder.
+ copy_to_buffer(Ptr, NumBytes);
+ flush_nonempty();
+ return write(Ptr + NumBytes, Size - NumBytes);
}
copy_to_buffer(Ptr, Size);
}
}
+raw_ostream &raw_ostream::operator<<(const FormattedString &FS) {
+ unsigned Len = FS.Str.size();
+ int PadAmount = FS.Width - Len;
+ if (FS.RightJustify && (PadAmount > 0))
+ this->indent(PadAmount);
+ this->operator<<(FS.Str);
+ if (!FS.RightJustify && (PadAmount > 0))
+ this->indent(PadAmount);
+ return *this;
+}
+
+raw_ostream &raw_ostream::operator<<(const FormattedNumber &FN) {
+ if (FN.Hex) {
+ unsigned Nibbles = (64 - countLeadingZeros(FN.HexValue)+3)/4;
+ unsigned PrefixChars = FN.HexPrefix ? 2 : 0;
+ unsigned Width = std::max(FN.Width, Nibbles + PrefixChars);
+
+ char NumberBuffer[20] = "0x0000000000000000";
+ if (!FN.HexPrefix)
+ NumberBuffer[1] = '0';
+ char *EndPtr = NumberBuffer+Width;
+ char *CurPtr = EndPtr;
+ const char A = FN.Upper ? 'A' : 'a';
+ unsigned long long N = FN.HexValue;
+ while (N) {
+ uintptr_t x = N % 16;
+ *--CurPtr = (x < 10 ? '0' + x : A + x - 10);
+ N /= 16;
+ }
+
+ return write(NumberBuffer, Width);
+ } else {
+ // Zero is a special case.
+ if (FN.DecValue == 0) {
+ this->indent(FN.Width-1);
+ return *this << '0';
+ }
+ char NumberBuffer[32];
+ char *EndPtr = NumberBuffer+sizeof(NumberBuffer);
+ char *CurPtr = EndPtr;
+ bool Neg = (FN.DecValue < 0);
+ uint64_t N = Neg ? -static_cast<uint64_t>(FN.DecValue) : FN.DecValue;
+ while (N) {
+ *--CurPtr = '0' + char(N % 10);
+ N /= 10;
+ }
+ int Len = EndPtr - CurPtr;
+ int Pad = FN.Width - Len;
+ if (Neg)
+ --Pad;
+ if (Pad > 0)
+ this->indent(Pad);
+ if (Neg)
+ *this << '-';
+ return write(CurPtr, Len);
+ }
+}
+
+
/// indent - Insert 'NumSpaces' spaces.
raw_ostream &raw_ostream::indent(unsigned NumSpaces) {
static const char Spaces[] = " "
// raw_fd_ostream
//===----------------------------------------------------------------------===//
-/// raw_fd_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.
-raw_fd_ostream::raw_fd_ostream(const char *Filename, std::string &ErrorInfo,
- unsigned Flags) : Error(false), pos(0) {
- assert(Filename != 0 && "Filename is null");
- // Verify that we don't have both "append" and "excl".
- assert((!(Flags & F_Excl) || !(Flags & F_Append)) &&
- "Cannot specify both 'excl' and 'append' file creation flags!");
-
- ErrorInfo.clear();
-
+raw_fd_ostream::raw_fd_ostream(StringRef Filename, std::error_code &EC,
+ sys::fs::OpenFlags Flags)
+ : Error(false), UseAtomicWrites(false), pos(0) {
+ EC = std::error_code();
// Handle "-" as stdout. Note that when we do this, we consider ourself
// the owner of stdout. This means that we can do things like close the
// file descriptor when we're done and set the "binary" flag globally.
- if (Filename[0] == '-' && Filename[1] == 0) {
+ if (Filename == "-") {
FD = STDOUT_FILENO;
// If user requested binary then put stdout into binary mode if
// possible.
- if (Flags & F_Binary)
- sys::Program::ChangeStdoutToBinary();
+ if (!(Flags & sys::fs::F_Text))
+ sys::ChangeStdoutToBinary();
// Close stdout when we're done, to detect any output errors.
ShouldClose = true;
return;
}
- int OpenFlags = O_WRONLY|O_CREAT;
-#ifdef O_BINARY
- if (Flags & F_Binary)
- OpenFlags |= O_BINARY;
-#endif
+ EC = sys::fs::openFileForWrite(Filename, FD, Flags);
- if (Flags & F_Append)
- OpenFlags |= O_APPEND;
- else
- OpenFlags |= O_TRUNC;
- if (Flags & F_Excl)
- OpenFlags |= O_EXCL;
-
- while ((FD = open(Filename, OpenFlags, 0664)) < 0) {
- if (errno != EINTR) {
- ErrorInfo = "Error opening output file '" + std::string(Filename) + "'";
- ShouldClose = false;
- return;
- }
+ if (EC) {
+ ShouldClose = false;
+ return;
}
// Ok, we successfully opened the file, so it'll need to be closed.
ShouldClose = 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_ostream(unbuffered), FD(fd), ShouldClose(shouldClose), Error(false),
+ UseAtomicWrites(false) {
+#ifdef O_BINARY
+ // Setting STDOUT to binary mode is necessary in Win32
+ // to avoid undesirable linefeed conversion.
+ // Don't touch STDERR, or w*printf() (in assert()) would barf wide chars.
+ if (fd == STDOUT_FILENO)
+ setmode(fd, O_BINARY);
+#endif
+
+ // Get the starting position.
+ off_t loc = ::lseek(FD, 0, SEEK_CUR);
+ SupportsSeeking = loc != (off_t)-1;
+ if (!SupportsSeeking)
+ pos = 0;
+ else
+ pos = static_cast<uint64_t>(loc);
+}
+
raw_fd_ostream::~raw_fd_ostream() {
if (FD >= 0) {
flush();
- if (ShouldClose)
- while (::close(FD) != 0)
- if (errno != EINTR) {
- error_detected();
- break;
- }
+ if (ShouldClose && sys::Process::SafelyCloseFileDescriptor(FD))
+ error_detected();
}
+#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.");
+ report_fatal_error("IO failure on output stream.", /*GenCrashDiag=*/false);
}
pos += Size;
do {
- ssize_t ret = ::write(FD, Ptr, Size);
+ ssize_t ret;
+
+ // Check whether we should attempt to use atomic writes.
+ if (LLVM_LIKELY(!UseAtomicWrites)) {
+ ret = ::write(FD, Ptr, Size);
+ } else {
+ // Use ::writev() where available.
+#if defined(HAVE_WRITEV)
+ const void *Addr = static_cast<const void *>(Ptr);
+ struct iovec IOV = {const_cast<void *>(Addr), Size };
+ ret = ::writev(FD, &IOV, 1);
+#else
+ ret = ::write(FD, Ptr, Size);
+#endif
+ }
if (ret < 0) {
// If it's a recoverable error, swallow it and retry the write.
assert(ShouldClose);
ShouldClose = false;
flush();
- while (::close(FD) != 0)
- if (errno != EINTR) {
- error_detected();
- break;
- }
+ if (sys::Process::SafelyCloseFileDescriptor(FD))
+ error_detected();
FD = -1;
}
return *this;
}
+raw_ostream &raw_fd_ostream::reverseColor() {
+ 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);
+}
+
//===----------------------------------------------------------------------===//
// outs(), errs(), nulls()
//===----------------------------------------------------------------------===//
/// Use it like: outs() << "foo" << "bar";
raw_ostream &llvm::outs() {
// Set buffer settings to model stdout behavior.
- // Delete the file descriptor when the program exists, forcing error
+ // Delete the file descriptor when the program exits, forcing error
// detection. If you don't want this behavior, don't use outs().
static raw_fd_ostream S(STDOUT_FILENO, true);
return S;
}
void raw_svector_ostream::write_impl(const char *Ptr, size_t Size) {
- // If we're writing bytes from the end of the buffer into the smallvector, we
- // don't need to copy the bytes, just commit the bytes because they are
- // already in the right place.
if (Ptr == OS.end()) {
- assert(OS.size() + Size <= OS.capacity() && "Invalid write_impl() call!");
- OS.set_size(OS.size() + Size);
+ // Grow the buffer to include the scratch area without copying.
+ size_t NewSize = OS.size() + Size;
+ assert(NewSize <= OS.capacity() && "Invalid write_impl() call!");
+ OS.set_size(NewSize);
} else {
- assert(GetNumBytesInBuffer() == 0 &&
- "Should be writing from buffer if some bytes in it");
- // Otherwise, do copy the bytes.
- OS.append(Ptr, Ptr+Size);
+ assert(!GetNumBytesInBuffer());
+ OS.append(Ptr, Ptr + Size);
}
- // Grow the vector if necessary.
- if (OS.capacity() - OS.size() < 64)
- OS.reserve(OS.capacity() * 2);
-
- // Update the buffer position.
+ OS.reserve(OS.size() + 64);
SetBuffer(OS.end(), OS.capacity() - OS.size());
}
uint64_t raw_null_ostream::current_pos() const {
return 0;
}
-
-//===----------------------------------------------------------------------===//
-// tool_output_file
-//===----------------------------------------------------------------------===//
-
-/// SetupRemoveOnSignal - This is a helper for tool_output_file's constructor
-/// to allow the signal handlers to be installed before constructing the
-/// base class raw_fd_ostream.
-static const char *SetupRemoveOnSignal(const char *Filename) {
- // Arrange for the file to be deleted if the process is killed.
- if (strcmp(Filename, "-") != 0)
- sys::RemoveFileOnSignal(sys::Path(Filename));
- return Filename;
-}
-
-tool_output_file::tool_output_file(const char *filename, std::string &ErrorInfo,
- unsigned Flags)
- : raw_fd_ostream(SetupRemoveOnSignal(filename), ErrorInfo, Flags),
- Filename(filename),
- Keep(!ErrorInfo.empty() /* If open fails, no cleanup is needed. */) {
-}
-
-tool_output_file::~tool_output_file() {
- // Delete the file if the client hasn't told us not to.
- if (!Keep && Filename != "-")
- sys::Path(Filename).eraseFromDisk();
-}
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