#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
// 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<<(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;
return this->operator<<(static_cast<unsigned long long>(N));
}
-raw_ostream &raw_ostream::operator<<(const void *P) {
- uintptr_t N = (uintptr_t) P;
- *this << '0' << 'x';
-
+raw_ostream &raw_ostream::write_hex(unsigned long long N) {
// Zero is a special case.
if (N == 0)
return *this << '0';
char *CurPtr = EndPtr;
while (N) {
- unsigned x = N % 16;
+ 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) {
+ *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);
}
if (!OutBufStart)
- SetBufferSize();
+ SetBuffered();
else
flush_nonempty();
}
return *this;
}
-raw_ostream &raw_ostream::write(const char *Ptr, unsigned Size) {
+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 (Unbuffered) {
- write_impl(Ptr, Size);
- return *this;
+ 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);
}
-
- if (!OutBufStart)
- SetBufferSize();
- else
+ // 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!");
+
// 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-OutBufCur)) {
- memcpy(OutBufCur, Ptr, Size);
- break;
- }
-
- // Otherwise we are emitting a string larger than our buffer. We
- // know we already flushed, so just write it out directly.
- write_impl(Ptr, Size);
- Size = 0;
+ memcpy(OutBufCur, Ptr, Size);
break;
}
- OutBufCur += Size;
- return *this;
+ OutBufCur += Size;
}
// 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.
- unsigned NextBufferSize = 127;
+ 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)
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;
}
}
}
-void raw_fd_ostream::write_impl(const char *Ptr, unsigned Size) {
+void raw_fd_ostream::write_impl(const char *Ptr, size_t Size) {
assert (FD >= 0 && "File already closed.");
pos += Size;
if (::write(FD, Ptr, Size) != (ssize_t) Size)
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())
(colors == SAVEDCOLOR) ? sys::Process::OutputBold(bg)
: sys::Process::OutputColor(colors, bold, bg);
if (colorcode) {
- unsigned len = strlen(colorcode);
+ size_t len = strlen(colorcode);
write(colorcode, len);
// don't account colors towards output characters
pos -= len;
flush();
const char *colorcode = sys::Process::ResetColor();
if (colorcode) {
- unsigned len = strlen(colorcode);
+ size_t len = strlen(colorcode);
write(colorcode, len);
// don't account colors towards output characters
pos -= len;
// raw_stdout/err_ostream
//===----------------------------------------------------------------------===//
-raw_stdout_ostream::raw_stdout_ostream():raw_fd_ostream(STDOUT_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) {}
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, unsigned Size) {
+void raw_os_ostream::write_impl(const char *Ptr, size_t Size) {
OS.write(Ptr, Size);
}
// raw_string_ostream
//===----------------------------------------------------------------------===//
-raw_string_ostream::~raw_string_ostream() {
- flush();
-}
-
-void raw_string_ostream::write_impl(const char *Ptr, unsigned Size) {
+void raw_string_ostream::write_impl(const char *Ptr, size_t Size) {
OS.append(Ptr, Size);
}
// raw_svector_ostream
//===----------------------------------------------------------------------===//
-raw_svector_ostream::~raw_svector_ostream() {
- flush();
-}
-
-void raw_svector_ostream::write_impl(const char *Ptr, unsigned Size) {
+void raw_svector_ostream::write_impl(const char *Ptr, size_t Size) {
OS.append(Ptr, Ptr + Size);
}
uint64_t raw_svector_ostream::tell() {
return OS.size() + GetNumBytesInBuffer();
}
+
+//===----------------------------------------------------------------------===//
+// raw_null_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
+}
+
+void raw_null_ostream::write_impl(const char *Ptr, size_t Size) {
+}
+
+uint64_t raw_null_ostream::current_pos() {
+ return 0;
+}
projects / oota-llvm.git / blobdiff