LLVM 20.0.0git
FormatCommon.h
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1//===- FormatCommon.h - Formatters for common LLVM types --------*- C++ -*-===//
2//
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
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLVM_SUPPORT_FORMATCOMMON_H
10#define LLVM_SUPPORT_FORMATCOMMON_H
11
15
16namespace llvm {
17enum class AlignStyle { Left, Center, Right };
18
19struct FmtAlign {
22 size_t Amount;
23 char Fill;
24
26 size_t Amount, char Fill = ' ')
28
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.
35 if (Amount == 0) {
37 return;
38 }
39 SmallString<64> Item;
40 raw_svector_ostream Stream(Item);
41
42 Adapter.format(Stream, Options);
43 if (Amount <= Item.size()) {
44 S << Item;
45 return;
46 }
47
48 size_t PadAmount = Amount - Item.size();
49 switch (Where) {
51 S << Item;
52 fill(S, PadAmount);
53 break;
54 case AlignStyle::Center: {
55 size_t X = PadAmount / 2;
56 fill(S, X);
57 S << Item;
58 fill(S, PadAmount - X);
59 break;
60 }
61 default:
62 fill(S, PadAmount);
63 S << Item;
64 break;
65 }
66 }
67
68private:
69 void fill(llvm::raw_ostream &S, size_t Count) {
70 for (size_t I = 0; I < Count; ++I)
71 S << Fill;
72 }
73};
74}
75
76#endif
static GCMetadataPrinterRegistry::Add< ErlangGCPrinter > X("erlang", "erlang-compatible garbage collector")
static LVOptions Options
Definition: LVOptions.cpp:25
#define I(x, y, z)
Definition: MD5.cpp:58
This file defines the SmallString class.
SmallString - A SmallString is just a SmallVector with methods and accessors that make it work better...
Definition: SmallString.h:26
size_t size() const
Definition: SmallVector.h:91
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
A raw_ostream that writes to an SmallVector or SmallString.
Definition: raw_ostream.h:691
virtual void format(raw_ostream &S, StringRef Options)=0
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
AlignStyle
Definition: FormatCommon.h:17
void format(raw_ostream &S, StringRef Options)
Definition: FormatCommon.h:29
FmtAlign(support::detail::format_adapter &Adapter, AlignStyle Where, size_t Amount, char Fill=' ')
Definition: FormatCommon.h:25
support::detail::format_adapter & Adapter
Definition: FormatCommon.h:20
AlignStyle Where
Definition: FormatCommon.h:21