utils/fpcmp/fpcmp.cpp

   1 //===- fpcmp.cpp - A fuzzy "cmp" that permits floating point noise --------===//
   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 // fpcmp is a tool that basically works like the 'cmp' tool, except that it can
  10 // tolerate errors due to floating point noise, with the -r and -a options.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/Support/CommandLine.h"
  15 #include "llvm/Support/FileUtilities.h"
  16 #include "llvm/Support/raw_ostream.h"
  17 using namespace llvm;
  18
  19 namespace {
  20   cl::opt<std::string>
  21   File1(cl::Positional, cl::desc("<input file #1>"), cl::Required);
  22   cl::opt<std::string>
  23   File2(cl::Positional, cl::desc("<input file #2>"), cl::Required);
  24
  25   cl::opt<double>
  26   RelTolerance("r", cl::desc("Relative error tolerated"), cl::init(0));
  27   cl::opt<double>
  28   AbsTolerance("a", cl::desc("Absolute error tolerated"), cl::init(0));
  29 }
  30
  31 int main(int argc, char **argv) {
  32   cl::ParseCommandLineOptions(argc, argv);
  33
  34   std::string ErrorMsg;
  35   int DF = DiffFilesWithTolerance(File1, File2, AbsTolerance, RelTolerance,
  36                                   &ErrorMsg);
  37   if (!ErrorMsg.empty())
  38     errs() << argv[0] << ": " << ErrorMsg << "\n";
  39   return DF;
  40 }
  41