//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_CODEGEN_ASMSTREAM_H
-#define LLVM_CODEGEN_ASMSTREAM_H
+#ifndef LLVM_SUPPORT_FORMATTEDSTREAM_H
+#define LLVM_SUPPORT_FORMATTEDSTREAM_H
#include "llvm/Support/raw_ostream.h"
namespace llvm
{
- /// raw_asm_fd_ostream - Formatted raw_fd_ostream to handle
- /// asm-specific constructs
+ /// formatted_raw_ostream - Formatted raw_fd_ostream to handle
+ /// asm-specific constructs.
///
class formatted_raw_ostream : public raw_ostream {
+ public:
+ /// DELETE_STREAM - Tell the destructor to delete the held stream.
+ ///
+ const static bool DELETE_STREAM = true;
+ /// PRESERVE_STREAM - Tell the destructor to not delete the held
+ /// stream.
+ ///
+ const static bool PRESERVE_STREAM = false;
+
private:
- /// TheStream - The real stream we output to
+ /// TheStream - The real stream we output to. We set it to be
+ /// unbuffered, since we're already doing our own buffering.
///
- raw_ostream &TheStream;
+ raw_ostream *TheStream;
+ /// DeleteStream - Do we need to delete TheStream in the
+ /// destructor?
+ ///
+ bool DeleteStream;
- /// Column - The current output column of the stream
+ /// Column - The current output column of the stream. The column
+ /// scheme is zero-based.
///
unsigned Column;
- virtual void write_impl(const char *Ptr, unsigned Size) {
+ virtual void write_impl(const char *Ptr, size_t Size) {
ComputeColumn(Ptr, Size);
- TheStream.write(Ptr, Size);
+ TheStream->write(Ptr, Size);
}
/// current_pos - Return the current position within the stream,
virtual uint64_t current_pos() {
// This has the same effect as calling TheStream.current_pos(),
// but that interface is private.
- return TheStream.tell() - TheStream.GetNumBytesInBuffer();
+ return TheStream->tell() - TheStream->GetNumBytesInBuffer();
}
/// ComputeColumn - Examine the current output and figure out
/// which column we end up in after output.
///
- void ComputeColumn(const char *Ptr, unsigned Size);
+ void ComputeColumn(const char *Ptr, size_t Size);
public:
/// formatted_raw_ostream - Open the specified file for
/// put into ErrorInfo, and the stream should be immediately
/// destroyed; the string will be empty if no error occurred.
///
- /// \param Filename - The file to open. If this is "-" then the
- /// stream will use stdout instead.
- /// \param Binary - The file should be opened in binary mode on
- /// platforms that support this distinction.
- formatted_raw_ostream(raw_ostream &Stream)
- : raw_ostream(), TheStream(Stream), Column(0) {}
-
- /// PadToColumn - Align the output to some column number
+ /// As a side effect, the given Stream is set to be Unbuffered.
+ /// This is because formatted_raw_ostream does its own buffering,
+ /// so it doesn't want another layer of buffering to be happening
+ /// underneath it.
+ ///
+ formatted_raw_ostream(raw_ostream &Stream, bool Delete = false)
+ : raw_ostream(), TheStream(0), DeleteStream(false), Column(0) {
+ setStream(Stream, Delete);
+ }
+ explicit formatted_raw_ostream()
+ : raw_ostream(), TheStream(0), DeleteStream(false), Column(0) {}
+
+ ~formatted_raw_ostream() {
+ if (DeleteStream)
+ delete TheStream;
+ }
+
+ void setStream(raw_ostream &Stream, bool Delete = false) {
+ if (DeleteStream)
+ delete TheStream;
+
+ TheStream = &Stream;
+ DeleteStream = Delete;
+
+ // This formatted_raw_ostream inherits from raw_ostream, so it'll do its
+ // 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())
+ SetBufferSize(BufferSize);
+ TheStream->SetUnbuffered();
+ }
+
+ /// PadToColumn - Align the output to some column number.
///
- /// \param NewCol - The column to move to
+ /// \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
+ /// recent I/O, even if the current column + minpad > newcol.
///
void PadToColumn(unsigned NewCol, unsigned MinPad = 0);
};
- /// Column - An I/O manipulator to advance the output to a certain column
- ///
- class Column {
- private:
- /// Col - The column to move to
- ///
- unsigned int Col;
+/// fouts() - This returns a reference to a formatted_raw_ostream for
+/// standard output. Use it like: fouts() << "foo" << "bar";
+formatted_raw_ostream &fouts();
- public:
- explicit Column(unsigned int c)
- : Col(c) {}
+/// ferrs() - This returns a reference to a formatted_raw_ostream for
+/// standard error. Use it like: ferrs() << "foo" << "bar";
+formatted_raw_ostream &ferrs();
- /// operator() - Make Column a functor invokable by a stream
- /// output operator.
- ///
- formatted_raw_ostream &operator()(formatted_raw_ostream &Out) const {
- // Make at least one space before the next output
- Out.PadToColumn(Col, 1);
- return(Out);
- }
- };
+} // end llvm namespace
- /// operator<< - Support coulmn-setting in formatted streams.
- ///
- inline formatted_raw_ostream &operator<<(formatted_raw_ostream &Out,
- const Column &Func)
- {
- return(Func(Out));
- }
-}
#endif
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