1//===- TableGenBackend.cpp - Utilities for TableGen Backends ----*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file provides useful services for TableGen backends...
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/ADT/Twine.h"
15#include "llvm/Support/raw_ostream.h"
16#include "llvm/TableGen/TableGenBackend.h"
17using namespace llvm;
18
19static void printLine(raw_ostream &OS, const Twine &Prefix, char Fill,
20                      StringRef Suffix) {
21  uint64_t Pos = OS.tell();
22  OS << Prefix;
23  for (unsigned i = OS.tell() - Pos, e = 80 - Suffix.size(); i != e; ++i)
24    OS << Fill;
25  OS << Suffix << '\n';
26}
27
28void llvm::emitSourceFileHeader(StringRef Desc, raw_ostream &OS) {
29  printLine(OS, "/*===- TableGen'erated file ", '-', "*- C++ -*-===*\\");
30  printLine(OS, "|*", ' ', "*|");
31  printLine(OS, "|* " + Desc, ' ', "*|");
32  printLine(OS, "|*", ' ', "*|");
33  printLine(OS, "|* Automatically generated file, do not edit!", ' ', "*|");
34  printLine(OS, "|*", ' ', "*|");
35  printLine(OS, "\\*===", '-', "===*/");
36  OS << '\n';
37}
38