#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/Format.h"
#include "llvm/System/Program.h"
+#include "llvm/System/Process.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Config/config.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/ErrorHandling.h"
#include <ostream>
+#include <sys/stat.h>
+#include <sys/types.h>
#if defined(HAVE_UNISTD_H)
# include <unistd.h>
using namespace llvm;
+raw_ostream::~raw_ostream() {
+ // raw_ostream's subclasses should take care to flush the buffer
+ // in their destructors.
+ assert(OutBufCur == OutBufStart &&
+ "raw_ostream destructor called with non-empty buffer!");
+
+ delete [] OutBufStart;
+
+ // If there are any pending errors, report them now. Clients wishing
+ // to avoid llvm_report_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 (Error)
+ llvm_report_error("IO failure on output stream.");
+}
// An out of line virtual method to provide a home for the class vtable.
void raw_ostream::handle() {}
+size_t raw_ostream::preferred_buffer_size() {
+ // BUFSIZ is intended to be a reasonable default.
+ return BUFSIZ;
+}
+
+void raw_ostream::SetBuffered() {
+ // Ask the subclass to determine an appropriate buffer size.
+ SetBufferSize(preferred_buffer_size());
+}
+
+void raw_ostream::SetBufferSize(size_t Size) {
+ assert(Size >= 64 &&
+ "Buffer size must be somewhat large for invariants to hold");
+ flush();
+
+ delete [] OutBufStart;
+ OutBufStart = new char[Size];
+ OutBufEnd = OutBufStart+Size;
+ OutBufCur = OutBufStart;
+ Unbuffered = false;
+}
+
+void raw_ostream::SetUnbuffered() {
+ flush();
+
+ delete [] OutBufStart;
+ OutBufStart = OutBufEnd = OutBufCur = 0;
+ Unbuffered = true;
+}
+
raw_ostream &raw_ostream::operator<<(unsigned long N) {
// Zero is a special case.
if (N == 0)
raw_ostream &raw_ostream::operator<<(long N) {
if (N < 0) {
- if (OutBufCur >= OutBufEnd)
- flush_impl();
- *OutBufCur++ = '-';
-
+ *this << '-';
N = -N;
}
}
raw_ostream &raw_ostream::operator<<(unsigned long long N) {
- // Zero is a special case.
- if (N == 0)
- return *this << '0';
-
+ // Output using 32-bit div/mod when possible.
+ if (N == static_cast<unsigned long>(N))
+ return this->operator<<(static_cast<unsigned long>(N));
+
char NumberBuffer[20];
char *EndPtr = NumberBuffer+sizeof(NumberBuffer);
char *CurPtr = EndPtr;
raw_ostream &raw_ostream::operator<<(long long N) {
if (N < 0) {
- if (OutBufCur >= OutBufEnd)
- flush_impl();
- *OutBufCur++ = '-';
-
+ *this << '-';
N = -N;
}
return this->operator<<(static_cast<unsigned long long>(N));
}
+raw_ostream &raw_ostream::write_hex(unsigned long long N) {
+ // Zero is a special case.
+ if (N == 0)
+ return *this << '0';
+
+ char NumberBuffer[20];
+ char *EndPtr = NumberBuffer+sizeof(NumberBuffer);
+ char *CurPtr = EndPtr;
+
+ while (N) {
+ uintptr_t x = N % 16;
+ *--CurPtr = (x < 10 ? '0' + x : 'a' + x - 10);
+ N /= 16;
+ }
+
+ return write(CurPtr, EndPtr-CurPtr);
+}
+
raw_ostream &raw_ostream::operator<<(const void *P) {
- // FIXME: This could be much faster if it matters.
- return *this << format("%p", P);
+ *this << '0' << 'x';
+
+ return write_hex((uintptr_t) P);
}
+void raw_ostream::flush_nonempty() {
+ assert(OutBufCur > OutBufStart && "Invalid call to flush_nonempty.");
+ write_impl(OutBufStart, OutBufCur - OutBufStart);
+ OutBufCur = OutBufStart;
+}
+
+raw_ostream &raw_ostream::write(unsigned char C) {
+ // Group exceptional cases into a single branch.
+ if (OutBufCur >= OutBufEnd) {
+ if (Unbuffered) {
+ write_impl(reinterpret_cast<char*>(&C), 1);
+ return *this;
+ }
+
+ if (!OutBufStart)
+ SetBuffered();
+ else
+ flush_nonempty();
+ }
+
+ *OutBufCur++ = C;
+ 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 (Unbuffered) {
+ write_impl(Ptr, Size);
+ return *this;
+ }
+ // Set up a buffer and start over.
+ SetBuffered();
+ 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);
+ }
+
+ copy_to_buffer(Ptr, Size);
+
+ return *this;
+}
+
+void raw_ostream::copy_to_buffer(const char *Ptr, size_t Size) {
+ assert(Size <= size_t(OutBufEnd - OutBufCur) && "Buffer overrun!");
-raw_ostream &raw_ostream::write(const char *Ptr, unsigned Size) {
- if (OutBufCur+Size > OutBufEnd)
- flush_impl();
-
// Handle short strings specially, memcpy isn't very good at very short
// strings.
switch (Size) {
case 1: OutBufCur[0] = Ptr[0]; // FALL THROUGH
case 0: break;
default:
- // Normally the string to emit is shorter than the buffer.
- if (Size <= unsigned(OutBufEnd-OutBufStart)) {
- memcpy(OutBufCur, Ptr, Size);
- break;
- }
-
- // If emitting a string larger than our buffer, emit in chunks. In this
- // case we know that we just flushed the buffer.
- while (Size) {
- unsigned NumToEmit = OutBufEnd-OutBufStart;
- if (Size < NumToEmit) NumToEmit = Size;
- assert(OutBufCur == OutBufStart);
- memcpy(OutBufStart, Ptr, NumToEmit);
- Ptr += NumToEmit;
- Size -= NumToEmit;
- OutBufCur = OutBufStart + NumToEmit;
- flush_impl();
- }
+ memcpy(OutBufCur, Ptr, Size);
break;
}
+
OutBufCur += Size;
- return *this;
}
// Formatted output.
raw_ostream &raw_ostream::operator<<(const format_object_base &Fmt) {
- // If we have more than a few bytes left in our output buffer, try formatting
- // directly onto its end.
- unsigned NextBufferSize = 127;
+ // If we have more than a few bytes left in our output buffer, try
+ // formatting directly onto its end.
+ //
+ // FIXME: This test is a bit silly, since if we don't have enough
+ // space in the buffer we will have to flush the formatted output
+ // anyway. We should just flush upfront in such cases, and use the
+ // whole buffer as our scratch pad. Note, however, that this case is
+ // also necessary for correctness on unbuffered streams.
+ size_t NextBufferSize = 127;
if (OutBufEnd-OutBufCur > 3) {
- unsigned BufferBytesLeft = OutBufEnd-OutBufCur;
- unsigned BytesUsed = Fmt.print(OutBufCur, BufferBytesLeft);
+ size_t BufferBytesLeft = OutBufEnd-OutBufCur;
+ size_t BytesUsed = Fmt.print(OutBufCur, BufferBytesLeft);
// Common case is that we have plenty of space.
if (BytesUsed < BufferBytesLeft) {
V.resize(NextBufferSize);
// Try formatting into the SmallVector.
- unsigned BytesUsed = Fmt.print(&V[0], NextBufferSize);
+ size_t BytesUsed = Fmt.print(&V[0], NextBufferSize);
// If BytesUsed fit into the vector, we win.
if (BytesUsed <= NextBufferSize)
/// 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, bool Binary,
+raw_fd_ostream::raw_fd_ostream(const char *Filename, bool Binary, bool Force,
std::string &ErrorInfo) : pos(0) {
ErrorInfo.clear();
if (Binary)
sys::Program::ChangeStdoutToBinary();
ShouldClose = false;
+ // Mimic stdout by defaulting to unbuffered if the output device
+ // is a terminal.
+ if (sys::Process::StandardOutIsDisplayed())
+ SetUnbuffered();
return;
}
if (Binary)
Flags |= O_BINARY;
#endif
- FD = open(Filename, Flags, 0644);
+ if (!Force)
+ Flags |= O_EXCL;
+ FD = open(Filename, Flags, 0664);
if (FD < 0) {
ErrorInfo = "Error opening output file '" + std::string(Filename) + "'";
ShouldClose = false;
if (FD >= 0) {
flush();
if (ShouldClose)
- ::close(FD);
+ if (::close(FD) != 0)
+ error_detected();
}
}
-void raw_fd_ostream::flush_impl() {
+void raw_fd_ostream::write_impl(const char *Ptr, size_t Size) {
assert (FD >= 0 && "File already closed.");
- if (OutBufCur-OutBufStart) {
- pos += (OutBufCur - OutBufStart);
- ::write(FD, OutBufStart, OutBufCur-OutBufStart);
- }
- HandleFlush();
+ pos += Size;
+ if (::write(FD, Ptr, Size) != (ssize_t) Size)
+ error_detected();
}
void raw_fd_ostream::close() {
assert (ShouldClose);
ShouldClose = false;
flush();
- ::close(FD);
+ if (::close(FD) != 0)
+ error_detected();
FD = -1;
}
uint64_t raw_fd_ostream::seek(uint64_t off) {
flush();
- pos = lseek(FD, off, SEEK_SET);
+ pos = ::lseek(FD, off, SEEK_SET);
+ if (pos != off)
+ error_detected();
return pos;
}
+size_t raw_fd_ostream::preferred_buffer_size() {
+#if !defined(_MSC_VER) // Windows reportedly doesn't have st_blksize.
+ assert(FD >= 0 && "File not yet open!");
+ struct stat statbuf;
+ if (fstat(FD, &statbuf) == 0)
+ return statbuf.st_blksize;
+ error_detected();
+#endif
+ return raw_ostream::preferred_buffer_size();
+}
+
+raw_ostream &raw_fd_ostream::changeColor(enum Colors colors, bool bold,
+ bool bg) {
+ if (sys::Process::ColorNeedsFlush())
+ flush();
+ const char *colorcode =
+ (colors == SAVEDCOLOR) ? sys::Process::OutputBold(bg)
+ : sys::Process::OutputColor(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 (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_stdout/err_ostream
//===----------------------------------------------------------------------===//
-raw_stdout_ostream::raw_stdout_ostream():raw_fd_ostream(STDOUT_FILENO, false) {}
-raw_stderr_ostream::raw_stderr_ostream():raw_fd_ostream(STDERR_FILENO, false) {}
+// Set buffer settings to model stdout and stderr behavior.
+// raw_ostream doesn't support line buffering, so set standard output to be
+// unbuffered when the output device is a terminal. Set standard error to
+// be unbuffered.
+raw_stdout_ostream::raw_stdout_ostream()
+ : raw_fd_ostream(STDOUT_FILENO, false,
+ sys::Process::StandardOutIsDisplayed()) {}
+raw_stderr_ostream::raw_stderr_ostream():raw_fd_ostream(STDERR_FILENO, false,
+ true) {}
// An out of line virtual method to provide a home for the class vtable.
void raw_stdout_ostream::handle() {}
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_os_ostream
//===----------------------------------------------------------------------===//
-raw_os_ostream::~raw_os_ostream() {
- flush();
+void raw_os_ostream::write_impl(const char *Ptr, size_t Size) {
+ OS.write(Ptr, Size);
}
-/// flush_impl - The is the piece of the class that is implemented by
-/// subclasses. This outputs the currently buffered data and resets the
-/// buffer to empty.
-void raw_os_ostream::flush_impl() {
- if (OutBufCur-OutBufStart)
- OS.write(OutBufStart, OutBufCur-OutBufStart);
- HandleFlush();
+uint64_t raw_os_ostream::current_pos() { return OS.tellp(); }
+
+uint64_t raw_os_ostream::tell() {
+ return (uint64_t)OS.tellp() + GetNumBytesInBuffer();
}
//===----------------------------------------------------------------------===//
// 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);
}
-/// flush_impl - The is the piece of the class that is implemented by
-/// subclasses. This outputs the currently buffered data and resets the
-/// buffer to empty.
-void raw_string_ostream::flush_impl() {
- if (OutBufCur-OutBufStart)
- OS.append(OutBufStart, OutBufCur-OutBufStart);
- HandleFlush();
+//===----------------------------------------------------------------------===//
+// raw_svector_ostream
+//===----------------------------------------------------------------------===//
+
+void raw_svector_ostream::write_impl(const char *Ptr, size_t Size) {
+ OS.append(Ptr, Ptr + Size);
+}
+
+uint64_t raw_svector_ostream::current_pos() { return OS.size(); }
+
+uint64_t raw_svector_ostream::tell() {
+ return OS.size() + GetNumBytesInBuffer();
}
//===----------------------------------------------------------------------===//
-// raw_svector_ostream
+// raw_null_ostream
//===----------------------------------------------------------------------===//
-raw_svector_ostream::~raw_svector_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
}
-/// flush_impl - The is the piece of the class that is implemented by
-/// subclasses. This outputs the currently buffered data and resets the
-/// buffer to empty.
-void raw_svector_ostream::flush_impl() {
- if (OutBufCur-OutBufStart)
- OS.append(OutBufStart, OutBufCur);
- HandleFlush();
+void raw_null_ostream::write_impl(const char *Ptr, size_t Size) {
}
+uint64_t raw_null_ostream::current_pos() {
+ return 0;
+}
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