1 //===- FormatCommon.h - Formatters for common LLVM types --------*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 #ifndef LLVM_SUPPORT_FORMATCOMMON_H
10 #define LLVM_SUPPORT_FORMATCOMMON_H
12 #include "llvm/ADT/SmallString.h"
13 #include "llvm/Support/FormatVariadicDetails.h"
14 #include "llvm/Support/raw_ostream.h"
17 enum class AlignStyle { Left, Center, Right };
20 detail::format_adapter &Adapter;
25 FmtAlign(detail::format_adapter &Adapter, AlignStyle Where, size_t Amount,
27 : Adapter(Adapter), Where(Where), Amount(Amount), Fill(Fill) {}
29 void format(raw_ostream &S, StringRef Options) {
30 // If we don't need to align, we can format straight into the underlying
31 // stream. Otherwise we have to go through an intermediate stream first
32 // in order to calculate how long the output is so we can align it.
33 // TODO: Make the format method return the number of bytes written, that
34 // way we can also skip the intermediate stream for left-aligned output.
36 Adapter.format(S, Options);
40 raw_svector_ostream Stream(Item);
42 Adapter.format(Stream, Options);
43 if (Amount <= Item.size()) {
48 size_t PadAmount = Amount - Item.size();
50 case AlignStyle::Left:
54 case AlignStyle::Center: {
55 size_t X = PadAmount / 2;
58 fill(S, PadAmount - X);
69 void fill(llvm::raw_ostream &S, uint32_t Count) {
70 for (uint32_t I = 0; I < Count; ++I)