]>
Commit | Line | Data |
---|---|---|
223e47cc LB |
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" | |
970d7e83 LB |
17 | #include <algorithm> |
18 | ||
223e47cc LB |
19 | using namespace llvm; |
20 | ||
970d7e83 LB |
21 | const size_t MAX_LINE_LEN = 80U; |
22 | ||
223e47cc LB |
23 | static void printLine(raw_ostream &OS, const Twine &Prefix, char Fill, |
24 | StringRef Suffix) { | |
970d7e83 LB |
25 | size_t Pos = (size_t)OS.tell(); |
26 | assert((MAX_LINE_LEN - Prefix.str().size() - Suffix.size() > 0) && | |
27 | "header line exceeds max limit"); | |
223e47cc | 28 | OS << Prefix; |
970d7e83 LB |
29 | const size_t e = MAX_LINE_LEN - Suffix.size(); |
30 | for (size_t i = (size_t)OS.tell() - Pos; i < e; ++i) | |
223e47cc LB |
31 | OS << Fill; |
32 | OS << Suffix << '\n'; | |
33 | } | |
34 | ||
35 | void llvm::emitSourceFileHeader(StringRef Desc, raw_ostream &OS) { | |
36 | printLine(OS, "/*===- TableGen'erated file ", '-', "*- C++ -*-===*\\"); | |
37 | printLine(OS, "|*", ' ', "*|"); | |
970d7e83 LB |
38 | size_t Pos = 0U; |
39 | size_t PosE; | |
40 | StringRef Prefix("|*"); | |
41 | StringRef Suffix(" *|"); | |
42 | do{ | |
43 | size_t PSLen = Suffix.size() + Prefix.size(); | |
44 | PosE = Pos + ((MAX_LINE_LEN > (Desc.size() - PSLen)) ? | |
45 | Desc.size() : | |
46 | MAX_LINE_LEN - PSLen); | |
47 | printLine(OS, Prefix + Desc.slice(Pos, PosE), ' ', Suffix); | |
48 | Pos = PosE; | |
49 | } while(Pos < Desc.size()); | |
50 | printLine(OS, Prefix, ' ', Suffix); | |
51 | printLine(OS, Prefix + " Automatically generated file, do not edit!", ' ', | |
52 | Suffix); | |
53 | printLine(OS, Prefix, ' ', Suffix); | |
223e47cc LB |
54 | printLine(OS, "\\*===", '-', "===*/"); |
55 | OS << '\n'; | |
56 | } |