//===----------------------------------------------------------------------===//
#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 <ostream>
+#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
if (BufferMode == InternalBuffer)
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() {
+size_t raw_ostream::preferred_buffer_size() const {
// BUFSIZ is intended to be a reasonable default.
return BUFSIZ;
}
SetUnbuffered();
}
-void raw_ostream::SetBufferAndMode(char *BufferStart, size_t Size,
- BufferKind Mode) {
- assert(((Mode == Unbuffered && BufferStart == 0 && Size == 0) ||
- (Mode != Unbuffered && BufferStart && Size >= 64)) &&
- "stream must be unbuffered, or have >= 64 bytes of buffer");
+void raw_ostream::SetBufferAndMode(char *BufferStart, size_t 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).
assert(GetNumBytesInBuffer() == 0 && "Current buffer is non-empty!");
// Zero is a special case.
if (N == 0)
return *this << '0';
-
+
char NumberBuffer[20];
char *EndPtr = NumberBuffer+sizeof(NumberBuffer);
char *CurPtr = EndPtr;
-
+
while (N) {
*--CurPtr = '0' + char(N % 10);
N /= 10;
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));
}
char NumberBuffer[20];
char *EndPtr = NumberBuffer+sizeof(NumberBuffer);
char *CurPtr = EndPtr;
-
+
while (N) {
*--CurPtr = '0' + char(N % 10);
N /= 10;
}
raw_ostream &raw_ostream::operator<<(long long N) {
- if (N < 0) {
+ if (N < 0) {
*this << '-';
- N = -N;
+ // Avoid undefined behavior on INT64_MIN with a cast.
+ N = -(unsigned long long)N;
}
-
+
return this->operator<<(static_cast<unsigned long long>(N));
}
return write(CurPtr, EndPtr-CurPtr);
}
+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];
+
+ switch (c) {
+ case '\\':
+ *this << '\\' << '\\';
+ break;
+ case '\t':
+ *this << '\\' << 't';
+ break;
+ case '\n':
+ *this << '\\' << 'n';
+ break;
+ case '"':
+ *this << '\\' << '"';
+ break;
+ default:
+ if (std::isprint(c)) {
+ *this << c;
+ break;
+ }
+
+ // 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));
+ }
+ }
+ }
+
+ return *this;
+}
+
raw_ostream &raw_ostream::operator<<(const void *P) {
*this << '0' << 'x';
return write_hex((uintptr_t) P);
}
+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));
+}
+
+
+
void raw_ostream::flush_nonempty() {
assert(OutBufCur > OutBufStart && "Invalid call to flush_nonempty.");
size_t Length = OutBufCur - OutBufStart;
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);
size_t BufferBytesLeft = OutBufEnd - OutBufCur;
if (BufferBytesLeft > 3) {
size_t BytesUsed = Fmt.print(OutBufCur, BufferBytesLeft);
-
+
// Common case is that we have plenty of space.
if (BytesUsed <= BufferBytesLeft) {
OutBufCur += BytesUsed;
return *this;
}
-
+
// Otherwise, we overflowed and the return value tells us the size to try
// again with.
NextBufferSize = BytesUsed;
}
-
+
// If we got here, we didn't have enough space in the output buffer for the
// string. Try printing into a SmallVector that is resized to have enough
// space. Iterate until we win.
SmallVector<char, 128> V;
-
+
while (1) {
V.resize(NextBufferSize);
-
+
// Try formatting into the SmallVector.
size_t BytesUsed = Fmt.print(V.data(), NextBufferSize);
-
+
// If BytesUsed fit into the vector, we win.
if (BytesUsed <= NextBufferSize)
return write(V.data(), BytesUsed);
-
+
// Otherwise, try again with a new size.
assert(BytesUsed > NextBufferSize && "Didn't grow buffer!?");
NextBufferSize = BytesUsed;
}
}
+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) {
- const char *Spaces = " ";
+ static const char Spaces[] = " "
+ " "
+ " ";
// Usually the indentation is small, handle it with a fastpath.
- if (NumSpaces <= 16)
+ if (NumSpaces < array_lengthof(Spaces))
return write(Spaces, NumSpaces);
-
+
while (NumSpaces) {
- unsigned NumToWrite = std::min(NumSpaces, 16U);
+ unsigned NumToWrite = std::min(NumSpaces,
+ (unsigned)array_lengthof(Spaces)-1);
write(Spaces, NumToWrite);
NumSpaces -= NumToWrite;
}
// 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) : pos(0) {
- // Verify that we don't have both "append" and "force".
- assert((!(Flags & F_Force) || !(Flags & F_Append)) &&
- "Cannot specify both 'force' and 'append' file creation flags!");
-
- ErrorInfo.clear();
-
- // Handle "-" as stdout.
- if (Filename[0] == '-' && Filename[1] == 0) {
+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 == "-") {
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;
+ }
+
+ EC = sys::fs::openFileForWrite(Filename, FD, Flags);
+
+ if (EC) {
ShouldClose = false;
return;
}
-
- int OpenFlags = O_WRONLY|O_CREAT;
+
+ // 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
- if (Flags & F_Binary)
- OpenFlags |= 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
-
- if (Flags & F_Force)
- OpenFlags |= O_TRUNC;
- else if (Flags & F_Append)
- OpenFlags |= O_APPEND;
+
+ // Get the starting position.
+ off_t loc = ::lseek(FD, 0, SEEK_CUR);
+ SupportsSeeking = loc != (off_t)-1;
+ if (!SupportsSeeking)
+ pos = 0;
else
- OpenFlags |= O_EXCL;
-
- FD = open(Filename, OpenFlags, 0664);
- if (FD < 0) {
- ErrorInfo = "Error opening output file '" + std::string(Filename) + "'";
- ShouldClose = false;
- } else {
- ShouldClose = true;
- }
+ pos = static_cast<uint64_t>(loc);
}
raw_fd_ostream::~raw_fd_ostream() {
- if (FD < 0) return;
- flush();
- if (ShouldClose)
- if (::close(FD) != 0)
+ if (FD >= 0) {
+ flush();
+ 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.", /*GenCrashDiag=*/false);
}
void raw_fd_ostream::write_impl(const char *Ptr, size_t Size) {
- assert (FD >= 0 && "File already closed.");
+ assert(FD >= 0 && "File already closed.");
pos += Size;
- if (::write(FD, Ptr, Size) != (ssize_t) Size)
- error_detected();
+
+ do {
+ 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.
+ //
+ // 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();
+ 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);
+ assert(ShouldClose);
ShouldClose = false;
flush();
- if (::close(FD) != 0)
+ if (sys::Process::SafelyCloseFileDescriptor(FD))
error_detected();
FD = -1;
}
pos = ::lseek(FD, off, SEEK_SET);
if (pos != off)
error_detected();
- return pos;
+ return pos;
}
-size_t raw_fd_ostream::preferred_buffer_size() {
-#if !defined(_MSC_VER) && !defined(__MINGW32__) // Windows has no st_blksize.
+size_t raw_fd_ostream::preferred_buffer_size() const {
+#if !defined(_MSC_VER) && !defined(__MINGW32__) && !defined(__minix)
+ // Windows and Minix have no st_blksize.
assert(FD >= 0 && "File not yet open!");
struct stat statbuf;
- if (fstat(FD, &statbuf) == 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;
- }
- error_detected();
-#endif
+ 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,
return *this;
}
-//===----------------------------------------------------------------------===//
-// raw_stdout/err_ostream
-//===----------------------------------------------------------------------===//
+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;
+}
-// Set buffer settings to model stdout and stderr behavior.
-// Set standard error to be unbuffered by default.
-raw_stdout_ostream::raw_stdout_ostream():raw_fd_ostream(STDOUT_FILENO, false) {}
-raw_stderr_ostream::raw_stderr_ostream():raw_fd_ostream(STDERR_FILENO, false,
- true) {}
+bool raw_fd_ostream::is_displayed() const {
+ return sys::Process::FileDescriptorIsDisplayed(FD);
+}
-// An out of line virtual method to provide a home for the class vtable.
-void raw_stdout_ostream::handle() {}
-void raw_stderr_ostream::handle() {}
+bool raw_fd_ostream::has_colors() const {
+ return sys::Process::FileDescriptorHasColors(FD);
+}
+
+//===----------------------------------------------------------------------===//
+// 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() {
- static raw_stdout_ostream S;
+ // Set buffer settings to model stdout behavior.
+ // 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;
}
/// errs() - This returns a reference to a raw_ostream for standard error.
/// Use it like: errs() << "foo" << "bar";
raw_ostream &llvm::errs() {
- static raw_stderr_ostream S;
+ // Set standard error to be unbuffered by default.
+ static raw_fd_ostream S(STDERR_FILENO, false, true);
return 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);
-}
-
-uint64_t raw_os_ostream::current_pos() { return OS.tellp(); }
//===----------------------------------------------------------------------===//
// raw_string_ostream
flush();
}
-void raw_svector_ostream::write_impl(const char *Ptr, size_t Size) {
- assert(Ptr == OS.end() && OS.size() + Size <= OS.capacity() &&
- "Invalid write_impl() call!");
-
- // We don't need to copy the bytes, just commit the bytes to the
- // SmallVector.
- OS.set_size(OS.size() + Size);
+/// resync - This is called when the SmallVector we're appending to is changed
+/// outside of the raw_svector_ostream's control. It is only safe to do this
+/// if the raw_svector_ostream has previously been flushed.
+void raw_svector_ostream::resync() {
+ assert(GetNumBytesInBuffer() == 0 && "Didn't flush before mutating vector");
- // Grow the vector if necessary.
if (OS.capacity() - OS.size() < 64)
OS.reserve(OS.capacity() * 2);
+ SetBuffer(OS.end(), OS.capacity() - OS.size());
+}
+
+void raw_svector_ostream::write_impl(const char *Ptr, size_t Size) {
+ if (Ptr == OS.end()) {
+ // 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());
+ OS.append(Ptr, Ptr + Size);
+ }
- // Update the buffer position.
+ OS.reserve(OS.size() + 64);
SetBuffer(OS.end(), OS.capacity() - OS.size());
}
-uint64_t raw_svector_ostream::current_pos() { return OS.size(); }
+uint64_t raw_svector_ostream::current_pos() const {
+ return OS.size();
+}
StringRef raw_svector_ostream::str() {
flush();
void raw_null_ostream::write_impl(const char *Ptr, size_t Size) {
}
-uint64_t raw_null_ostream::current_pos() {
+uint64_t raw_null_ostream::current_pos() const {
return 0;
}
projects / oota-llvm.git / blobdiff