-//===- TableGenBackend.cpp - Base class for TableGen Backends ---*- C++ -*-===//
+//===- TableGenBackend.cpp - Utilities for TableGen Backends ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/raw_ostream.h"
#include "llvm/TableGen/TableGenBackend.h"
-#include "llvm/TableGen/Record.h"
+#include <algorithm>
+
using namespace llvm;
-void TableGenBackend::anchor() { }
+const size_t MAX_LINE_LEN = 80U;
-void TableGenBackend::EmitSourceFileHeader(StringRef Desc,
- raw_ostream &OS) const {
- emitSourceFileHeader(Desc, OS);
+static void printLine(raw_ostream &OS, const Twine &Prefix, char Fill,
+ StringRef Suffix) {
+ size_t Pos = (size_t)OS.tell();
+ assert((MAX_LINE_LEN - Prefix.str().size() - Suffix.size() > 0) &&
+ "header line exceeds max limit");
+ OS << Prefix;
+ const size_t e = MAX_LINE_LEN - Suffix.size();
+ for (size_t i = (size_t)OS.tell() - Pos; i < e; ++i)
+ OS << Fill;
+ OS << Suffix << '\n';
}
void llvm::emitSourceFileHeader(StringRef Desc, raw_ostream &OS) {
- OS << "//===- TableGen'erated file -------------------------------------*-"
- " C++ -*-===//\n//\n// " << Desc << "\n//\n// Automatically generate"
- "d file, do not edit!\n//\n//===------------------------------------"
- "----------------------------------===//\n\n";
+ printLine(OS, "/*===- TableGen'erated file ", '-', "*- C++ -*-===*\\");
+ printLine(OS, "|*", ' ', "*|");
+ size_t Pos = 0U;
+ size_t PosE;
+ StringRef Prefix("|*");
+ StringRef Suffix(" *|");
+ do{
+ size_t PSLen = Suffix.size() + Prefix.size();
+ PosE = Pos + ((MAX_LINE_LEN > (Desc.size() - PSLen)) ?
+ Desc.size() :
+ MAX_LINE_LEN - PSLen);
+ printLine(OS, Prefix + Desc.slice(Pos, PosE), ' ', Suffix);
+ Pos = PosE;
+ } while(Pos < Desc.size());
+ printLine(OS, Prefix, ' ', Suffix);
+ printLine(OS, Prefix + " Automatically generated file, do not edit!", ' ',
+ Suffix);
+ printLine(OS, Prefix, ' ', Suffix);
+ printLine(OS, "\\*===", '-', "===*/");
+ OS << '\n';
}