#include "llvm/Config/config.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
-#include <ostream>
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringExtras.h"
#include <sys/stat.h>
#include <sys/types.h>
OutBufEnd = OutBufStart+Size;
OutBufCur = OutBufStart;
BufferMode = Mode;
+
+ assert(OutBufStart <= OutBufEnd && "Invalid size!");
}
raw_ostream &raw_ostream::operator<<(unsigned long N) {
}
raw_ostream &raw_ostream::operator<<(unsigned long long N) {
- // Handle simple case when value fits in long already.
+ // Output using 32-bit div/mod when possible.
if (N == static_cast<unsigned long>(N))
return this->operator<<(static_cast<unsigned long>(N));
- // Otherwise divide into at two or three 10**9 chunks and write out using
- // long div/mod, this is substantially faster on a 32-bit system.
- unsigned long Top = 0, Mid = 0, Bot = N % 1000000000;
- N /= 1000000000;
- if (N > 1000000000) {
- Mid = N % 1000000000;
- Top = N / 1000000000;
- } else
- Mid = N;
-
- if (Top)
- this->operator<<(static_cast<unsigned long>(Top));
- this->operator<<(static_cast<unsigned long>(Mid));
- return this->operator<<(static_cast<unsigned long>(Bot));
+ char NumberBuffer[20];
+ char *EndPtr = NumberBuffer+sizeof(NumberBuffer);
+ char *CurPtr = EndPtr;
+
+ while (N) {
+ *--CurPtr = '0' + char(N % 10);
+ N /= 10;
+ }
+ return write(CurPtr, EndPtr-CurPtr);
}
raw_ostream &raw_ostream::operator<<(long long N) {
return write_hex((uintptr_t) P);
}
+raw_ostream &raw_ostream::operator<<(double N) {
+ this->operator<<(ftostr(N));
+ return *this;
+}
+
+
+
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 (OutBufCur >= OutBufEnd) {
- if (BufferMode == Unbuffered) {
- write_impl(reinterpret_cast<char*>(&C), 1);
- return *this;
- }
-
- if (OutBufStart)
- flush_nonempty();
- else {
- SetBuffered();
- // It's possible for the underlying stream to decline
- // buffering, so check this condition again.
+ if (BUILTIN_EXPECT(OutBufCur >= OutBufEnd, false)) {
+ if (BUILTIN_EXPECT(!OutBufStart, false)) {
if (BufferMode == Unbuffered) {
write_impl(reinterpret_cast<char*>(&C), 1);
return *this;
}
+ // Set up a buffer and start over.
+ SetBuffered();
+ return write(C);
}
+
+ flush_nonempty();
}
*OutBufCur++ = C;
SetBuffered();
return write(Ptr, Size);
}
+
// Write out the data in buffer-sized blocks until the remainder
// fits within the buffer.
do {
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.
- //
- // 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) {
- size_t BufferBytesLeft = OutBufEnd-OutBufCur;
+ 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) {
+ if (BytesUsed <= BufferBytesLeft) {
OutBufCur += BytesUsed;
return *this;
}
V.resize(NextBufferSize);
// Try formatting into the SmallVector.
- size_t BytesUsed = Fmt.print(&V[0], NextBufferSize);
+ size_t BytesUsed = Fmt.print(V.data(), NextBufferSize);
// If BytesUsed fit into the vector, we win.
if (BytesUsed <= NextBufferSize)
- return write(&V[0], BytesUsed);
+ return write(V.data(), BytesUsed);
// Otherwise, try again with a new size.
assert(BytesUsed > NextBufferSize && "Didn't grow buffer!?");
}
}
+/// indent - Insert 'NumSpaces' spaces.
+raw_ostream &raw_ostream::indent(unsigned NumSpaces) {
+ static const char Spaces[] = " "
+ " "
+ " ";
+
+ // Usually the indentation is small, handle it with a fastpath.
+ if (NumSpaces < array_lengthof(Spaces))
+ return write(Spaces, NumSpaces);
+
+ while (NumSpaces) {
+ unsigned NumToWrite = std::min(NumSpaces,
+ (unsigned)array_lengthof(Spaces)-1);
+ write(Spaces, NumToWrite);
+ NumSpaces -= NumToWrite;
+ }
+ return *this;
+}
+
+
//===----------------------------------------------------------------------===//
// Formatted Output
//===----------------------------------------------------------------------===//
/// 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, bool Force,
- std::string &ErrorInfo) : pos(0) {
+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 "excl".
+ assert((!(Flags & F_Excl) || !(Flags & F_Append)) &&
+ "Cannot specify both 'excl' and 'append' file creation flags!");
+
ErrorInfo.clear();
// Handle "-" as stdout.
FD = STDOUT_FILENO;
// If user requested binary then put stdout into binary mode if
// possible.
- if (Binary)
+ if (Flags & F_Binary)
sys::Program::ChangeStdoutToBinary();
ShouldClose = false;
return;
}
- int Flags = O_WRONLY|O_CREAT|O_TRUNC;
+ int OpenFlags = O_WRONLY|O_CREAT;
#ifdef O_BINARY
- if (Binary)
- Flags |= O_BINARY;
+ if (Flags & F_Binary)
+ OpenFlags |= O_BINARY;
#endif
- if (!Force)
- Flags |= O_EXCL;
- FD = open(Filename, Flags, 0664);
+
+ if (Flags & F_Append)
+ OpenFlags |= O_APPEND;
+ else
+ OpenFlags |= O_TRUNC;
+ if (Flags & F_Excl)
+ OpenFlags |= O_EXCL;
+
+ FD = open(Filename, OpenFlags, 0664);
if (FD < 0) {
ErrorInfo = "Error opening output file '" + std::string(Filename) + "'";
ShouldClose = false;
}
raw_fd_ostream::~raw_fd_ostream() {
- if (FD >= 0) {
- flush();
- if (ShouldClose)
- if (::close(FD) != 0)
- error_detected();
- }
+ if (FD < 0) return;
+ flush();
+ if (ShouldClose)
+ if (::close(FD) != 0)
+ error_detected();
}
+
void raw_fd_ostream::write_impl(const char *Ptr, size_t Size) {
assert (FD >= 0 && "File already closed.");
pos += Size;
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
// raw_svector_ostream
//===----------------------------------------------------------------------===//
+// The raw_svector_ostream implementation uses the SmallVector itself as the
+// buffer for the raw_ostream. We guarantee that the raw_ostream buffer is
+// always pointing past the end of the vector, but within the vector
+// capacity. This allows raw_ostream to write directly into the correct place,
+// and we only need to set the vector size when the data is flushed.
+
raw_svector_ostream::raw_svector_ostream(SmallVectorImpl<char> &O) : OS(O) {
+ // Set up the initial external buffer. We make sure that the buffer has at
+ // least 128 bytes free; raw_ostream itself only requires 64, but we want to
+ // make sure that we don't grow the buffer unnecessarily on destruction (when
+ // the data is flushed). See the FIXME below.
+ OS.reserve(OS.size() + 128);
+ SetBuffer(OS.end(), OS.capacity() - OS.size());
}
raw_svector_ostream::~raw_svector_ostream() {
+ // FIXME: Prevent resizing during this flush().
flush();
}
void raw_svector_ostream::write_impl(const char *Ptr, size_t Size) {
- OS.append(Ptr, Ptr + 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);
+
+ // Grow the vector if necessary.
+ if (OS.capacity() - OS.size() < 64)
+ OS.reserve(OS.capacity() * 2);
+
+ // Update the buffer position.
+ SetBuffer(OS.end(), OS.capacity() - OS.size());
}
uint64_t raw_svector_ostream::current_pos() { return OS.size(); }
+StringRef raw_svector_ostream::str() {
+ flush();
+ return StringRef(OS.begin(), OS.size());
+}
+
//===----------------------------------------------------------------------===//
// raw_null_ostream
//===----------------------------------------------------------------------===//
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