1 files changed, 107 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Support/FormattedStream.cpp b/contrib/llvm/lib/Support/FormattedStream.cpp
new file mode 100644
index 0000000..2ed71c7
--- /dev/null
+++ b/contrib/llvm/lib/Support/FormattedStream.cpp
@@ -0,0 +1,107 @@
+//===-- llvm/Support/FormattedStream.cpp - Formatted streams ----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the implementation of formatted_raw_ostream.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/raw_ostream.h"
+#include <algorithm>
+
+using namespace llvm;
+
+/// UpdatePosition - Examine the given char sequence and figure out which
+/// column we end up in after output, and how many line breaks are contained.
+///
+static void UpdatePosition(std::pair<unsigned, unsigned> &Position, const char *Ptr, size_t Size) {
+  unsigned &Column = Position.first;
+  unsigned &Line = Position.second;
+
+  // Keep track of the current column and line by scanning the string for
+  // special characters
+  for (const char *End = Ptr + Size; Ptr != End; ++Ptr) {
+    ++Column;
+    switch (*Ptr) {
+    case '\n':
+      Line += 1;
+    case '\r':
+      Column = 0;
+      break;
+    case '\t':
+      // Assumes tab stop = 8 characters.
+      Column += (8 - (Column & 0x7)) & 0x7;
+      break;
+    }
+  }
+}
+
+/// ComputePosition - Examine the current output and update line and column
+/// counts.
+void formatted_raw_ostream::ComputePosition(const char *Ptr, size_t Size) {
+  // If our previous scan pointer is inside the buffer, assume we already
+  // scanned those bytes. This depends on raw_ostream to not change our buffer
+  // in unexpected ways.
+  if (Ptr <= Scanned && Scanned <= Ptr + Size)
+    // Scan all characters added since our last scan to determine the new
+    // column.
+    UpdatePosition(Position, Scanned, Size - (Scanned - Ptr));
+  else
+    UpdatePosition(Position, Ptr, Size);
+
+  // Update the scanning pointer.
+  Scanned = Ptr + Size;
+}
+
+/// PadToColumn - Align the output to some column number.
+///
+/// \param NewCol - The column to move to.
+///
+formatted_raw_ostream &formatted_raw_ostream::PadToColumn(unsigned NewCol) { 
+  // Figure out what's in the buffer and add it to the column count.
+  ComputePosition(getBufferStart(), GetNumBytesInBuffer());
+
+  // Output spaces until we reach the desired column.
+  indent(std::max(int(NewCol - getColumn()), 1));
+  return *this;
+}
+
+void formatted_raw_ostream::write_impl(const char *Ptr, size_t Size) {
+  // Figure out what's in the buffer and add it to the column count.
+  ComputePosition(Ptr, Size);
+
+  // Write the data to the underlying stream (which is unbuffered, so
+  // the data will be immediately written out).
+  TheStream->write(Ptr, Size);
+
+  // Reset the scanning pointer.
+  Scanned = nullptr;
+}
+
+/// fouts() - This returns a reference to a formatted_raw_ostream for
+/// standard output.  Use it like: fouts() << "foo" << "bar";
+formatted_raw_ostream &llvm::fouts() {
+  static formatted_raw_ostream S(outs());
+  return S;
+}
+
+/// ferrs() - This returns a reference to a formatted_raw_ostream for
+/// standard error.  Use it like: ferrs() << "foo" << "bar";
+formatted_raw_ostream &llvm::ferrs() {
+  static formatted_raw_ostream S(errs());
+  return S;
+}
+
+/// fdbgs() - This returns a reference to a formatted_raw_ostream for
+/// the debug stream.  Use it like: fdbgs() << "foo" << "bar";
+formatted_raw_ostream &llvm::fdbgs() {
+  static formatted_raw_ostream S(dbgs());
+  return S;
+}