X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FSupport%2FFormattedStream.h;h=58a18851687ca2b7732f43af1d68b0ef0b4af11f;hb=a00b80b04c5edb08639c1c6b32e9231fd8b066f7;hp=4b13ff2d5abc0ebf396fe6fcf21bbe37605ce541;hpb=95db93caa1130725123eb50479d0c51c09e8a2f4;p=oota-llvm.git

diff --git a/include/llvm/Support/FormattedStream.h b/include/llvm/Support/FormattedStream.h
index 4b13ff2d5ab..58a18851687 100644
--- a/include/llvm/Support/FormattedStream.h
+++ b/include/llvm/Support/FormattedStream.h
@@ -1,4 +1,4 @@
-//===-- llvm/CodeGen/FormattedStream.h - Formatted streams ------*- C++ -*-===//
+//===-- llvm/Support/FormattedStream.h - Formatted streams ------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -26,17 +26,12 @@ namespace llvm
   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
@@ -49,28 +44,31 @@ namespace llvm
     ///
     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
@@ -84,20 +82,21 @@ namespace llvm
     /// 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;
@@ -106,19 +105,35 @@ namespace llvm
       // 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
@@ -129,6 +144,10 @@ formatted_raw_ostream &fouts();
 /// 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