1 files changed, 76 insertions, 0 deletions
diff --git a/clang-r353983e/include/llvm/Support/FormatCommon.h b/clang-r353983e/include/llvm/Support/FormatCommon.h
new file mode 100644
index 00000000..3c119d12
--- /dev/null
+++ b/clang-r353983e/include/llvm/Support/FormatCommon.h
@@ -0,0 +1,76 @@
+//===- FormatCommon.h - Formatters for common LLVM types --------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_FORMATCOMMON_H
+#define LLVM_SUPPORT_FORMATCOMMON_H
+
+#include "llvm/ADT/SmallString.h"
+#include "llvm/Support/FormatVariadicDetails.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace llvm {
+enum class AlignStyle { Left, Center, Right };
+
+struct FmtAlign {
+  detail::format_adapter &Adapter;
+  AlignStyle Where;
+  size_t Amount;
+  char Fill;
+
+  FmtAlign(detail::format_adapter &Adapter, AlignStyle Where, size_t Amount,
+           char Fill = ' ')
+      : Adapter(Adapter), Where(Where), Amount(Amount), Fill(Fill) {}
+
+  void format(raw_ostream &S, StringRef Options) {
+    // If we don't need to align, we can format straight into the underlying
+    // stream.  Otherwise we have to go through an intermediate stream first
+    // in order to calculate how long the output is so we can align it.
+    // TODO: Make the format method return the number of bytes written, that
+    // way we can also skip the intermediate stream for left-aligned output.
+    if (Amount == 0) {
+      Adapter.format(S, Options);
+      return;
+    }
+    SmallString<64> Item;
+    raw_svector_ostream Stream(Item);
+
+    Adapter.format(Stream, Options);
+    if (Amount <= Item.size()) {
+      S << Item;
+      return;
+    }
+
+    size_t PadAmount = Amount - Item.size();
+    switch (Where) {
+    case AlignStyle::Left:
+      S << Item;
+      fill(S, PadAmount);
+      break;
+    case AlignStyle::Center: {
+      size_t X = PadAmount / 2;
+      fill(S, X);
+      S << Item;
+      fill(S, PadAmount - X);
+      break;
+    }
+    default:
+      fill(S, PadAmount);
+      S << Item;
+      break;
+    }
+  }
+
+private:
+  void fill(llvm::raw_ostream &S, uint32_t Count) {
+    for (uint32_t I = 0; I < Count; ++I)
+      S << Fill;
+  }
+};
+}
+
+#endif