-//===-- llvm/CodeGen/FormattedStream.h - Formatted streams ------*- C++ -*-===//
+//===-- llvm/Support/FormattedStream.h - Formatted streams ------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
public:
/// DELETE_STREAM - Tell the destructor to delete the held stream.
///
- const static bool DELETE_STREAM = true;
+ static const bool DELETE_STREAM = true;
/// PRESERVE_STREAM - Tell the destructor to not delete the held
/// stream.
///
- const static bool PRESERVE_STREAM = false;
-
- /// MAX_COLUMN_PAD - This is the maximum column padding we ever
- /// expect to see.
- ///
- const static unsigned MAX_COLUMN_PAD = 100;
+ static const bool PRESERVE_STREAM = false;
private:
/// TheStream - The real stream we output to. We set it to be
///
bool DeleteStream;
- /// Column - The current output column of the stream. The column
- /// scheme is zero-based.
+ /// ColumnScanned - The current output column of the data that's
+ /// been flushed and the portion of the buffer that's been
+ /// scanned. The column scheme is zero-based.
///
- unsigned Column;
+ unsigned ColumnScanned;
- virtual void write_impl(const char *Ptr, size_t Size) {
- ComputeColumn(Ptr, Size);
- TheStream->write(Ptr, Size);
- }
+ /// Scanned - This points to one past the last character in the
+ /// buffer we've scanned.
+ ///
+ const char *Scanned;
+
+ virtual void write_impl(const char *Ptr, size_t Size);
/// current_pos - Return the current position within the stream,
/// not counting the bytes currently in the buffer.
- virtual uint64_t current_pos() {
+ virtual uint64_t current_pos() const {
// This has the same effect as calling TheStream.current_pos(),
// but that interface is private.
return TheStream->tell() - TheStream->GetNumBytesInBuffer();
}
- /// ComputeColumn - Examine the current output and figure out
- /// which column we end up in after output.
+ /// ComputeColumn - Examine the given output buffer and figure out which
+ /// column we end up in after output.
///
- void ComputeColumn(const char *Ptr, size_t Size);
+ void ComputeColumn(const char *Ptr, size_t size);
public:
/// formatted_raw_ostream - Open the specified file for
/// underneath it.
///
formatted_raw_ostream(raw_ostream &Stream, bool Delete = false)
- : raw_ostream(), TheStream(0), DeleteStream(false), Column(0) {
+ : raw_ostream(), TheStream(0), DeleteStream(false), ColumnScanned(0) {
setStream(Stream, Delete);
}
explicit formatted_raw_ostream()
- : raw_ostream(), TheStream(0), DeleteStream(false), Column(0) {}
+ : raw_ostream(), TheStream(0), DeleteStream(false), ColumnScanned(0) {
+ Scanned = 0;
+ }
~formatted_raw_ostream() {
- if (DeleteStream)
- delete TheStream;
+ flush();
+ releaseStream();
}
-
+
void setStream(raw_ostream &Stream, bool Delete = false) {
- if (DeleteStream)
- delete TheStream;
+ releaseStream();
TheStream = &Stream;
DeleteStream = Delete;
// own buffering, and it doesn't need or want TheStream to do another
// layer of buffering underneath. Resize the buffer to what TheStream
// had been using, and tell TheStream not to do its own buffering.
- TheStream->flush();
- if (size_t BufferSize = TheStream->GetNumBytesInBuffer())
+ if (size_t BufferSize = TheStream->GetBufferSize())
SetBufferSize(BufferSize);
+ else
+ SetUnbuffered();
TheStream->SetUnbuffered();
+
+ Scanned = 0;
}
- /// PadToColumn - Align the output to some column number.
+ /// PadToColumn - Align the output to some column number. If the current
+ /// column is already equal to or more than NewCol, PadToColumn inserts one
+ /// space.
///
/// \param NewCol - The column to move to.
- /// \param MinPad - The minimum space to give after the most
- /// recent I/O, even if the current column + minpad > newcol.
- ///
- void PadToColumn(unsigned NewCol, unsigned MinPad = 0);
+ formatted_raw_ostream &PadToColumn(unsigned NewCol);
+
+ private:
+ void releaseStream() {
+ // Delete the stream if needed. Otherwise, transfer the buffer
+ // settings from this raw_ostream back to the underlying stream.
+ if (!TheStream)
+ return;
+ if (DeleteStream)
+ delete TheStream;
+ else if (size_t BufferSize = GetBufferSize())
+ TheStream->SetBufferSize(BufferSize);
+ else
+ TheStream->SetUnbuffered();
+ }
};
/// fouts() - This returns a reference to a formatted_raw_ostream for
/// standard error. Use it like: ferrs() << "foo" << "bar";
formatted_raw_ostream &ferrs();
+/// fdbgs() - This returns a reference to a formatted_raw_ostream for
+/// debug output. Use it like: fdbgs() << "foo" << "bar";
+formatted_raw_ostream &fdbgs();
+
} // end llvm namespace