X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=lib%2FSupport%2Fraw_ostream.cpp;h=37e892e68641fbc65be01e3ec7b520be9ec43b57;hp=cb9648981a36a851828144d9d8d5cab41192f911;hb=47882583cb1a7b2b7cec3a5d0691559b52ee4d5f;hpb=63fac20ec524fdbcc59e94c0950be15ee660b3be diff --git a/lib/Support/raw_ostream.cpp b/lib/Support/raw_ostream.cpp index cb9648981a3..37e892e6864 100644 --- a/lib/Support/raw_ostream.cpp +++ b/lib/Support/raw_ostream.cpp @@ -20,12 +20,13 @@ #include "llvm/Support/ErrorHandling.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 "llvm/Support/system_error.h" #include #include #include +#include // may provide O_BINARY. #if defined(HAVE_FCNTL_H) @@ -87,8 +88,8 @@ void raw_ostream::SetBuffered() { void raw_ostream::SetBufferAndMode(char *BufferStart, size_t Size, BufferKind Mode) { - assert(((Mode == Unbuffered && BufferStart == 0 && Size == 0) || - (Mode != Unbuffered && BufferStart && Size)) && + 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). @@ -227,15 +228,21 @@ raw_ostream &raw_ostream::operator<<(double N) { // 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 = snprintf(buf, sizeof(buf), "%e", N); + 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]; @@ -305,6 +312,7 @@ raw_ostream &raw_ostream::write(const char *Ptr, size_t Size) { // 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; @@ -388,6 +396,65 @@ raw_ostream &raw_ostream::operator<<(const format_object_base &Fmt) { } } +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(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[] = " " @@ -420,35 +487,27 @@ void format_object_base::home() { // 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, +raw_fd_ostream::raw_fd_ostream(StringRef Filename, std::error_code &EC, sys::fs::OpenFlags Flags) : Error(false), UseAtomicWrites(false), pos(0) { - assert(Filename != 0 && "Filename is null"); - ErrorInfo.clear(); - + 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 & sys::fs::F_Binary) + if (!(Flags & sys::fs::F_Text)) sys::ChangeStdoutToBinary(); // Close stdout when we're done, to detect any output errors. ShouldClose = true; return; } - error_code EC = sys::fs::openFileForWrite(Filename, FD, Flags); + EC = sys::fs::openFileForWrite(Filename, FD, Flags); if (EC) { - ErrorInfo = "Error opening output file '" + std::string(Filename) + "': " + - EC.message(); ShouldClose = false; return; } @@ -457,21 +516,23 @@ raw_fd_ostream::raw_fd_ostream(const char *Filename, std::string &ErrorInfo, ShouldClose = true; } -/// raw_fd_ostream ctor - FD is the file descriptor that this writes to. If -/// ShouldClose is true, this closes the file when the stream is destroyed. +/// 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) { + : raw_ostream(unbuffered), FD(fd), ShouldClose(shouldClose), Error(false), + UseAtomicWrites(false) { #ifdef O_BINARY - // Setting STDOUT and STDERR to binary mode is necessary in Win32 + // Setting STDOUT to binary mode is necessary in Win32 // to avoid undesirable linefeed conversion. - if (fd == STDOUT_FILENO || fd == STDERR_FILENO) + // 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); - if (loc == (off_t)-1) + SupportsSeeking = loc != (off_t)-1; + if (!SupportsSeeking) pos = 0; else pos = static_cast(loc); @@ -480,12 +541,8 @@ raw_fd_ostream::raw_fd_ostream(int fd, bool shouldClose, bool unbuffered) 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__ @@ -559,11 +616,8 @@ void raw_fd_ostream::close() { assert(ShouldClose); ShouldClose = false; flush(); - while (::close(FD) != 0) - if (errno != EINTR) { - error_detected(); - break; - } + if (sys::Process::SafelyCloseFileDescriptor(FD)) + error_detected(); FD = -1; } @@ -653,7 +707,7 @@ bool raw_fd_ostream::has_colors() const { /// 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; @@ -722,24 +776,17 @@ void raw_svector_ostream::resync() { } 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()); }