utils/fpcmp/fpcmp.cpp

   1 //===- fpcmp.cpp - A fuzzy "cmp" that permits floating point noise --------===//
   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 // fpcmp is a tool that basically works like the 'cmp' tool, except that it can
  11 // tolerate errors due to floating point noise, with the -r and -a options.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "llvm/Support/CommandLine.h"
  16 #include "llvm/Support/FileUtilities.h"
  17 #include "llvm/Support/raw_ostream.h"
  18 using namespace llvm;
  19
  20 namespace {
  21   cl::opt<std::string>
  22   File1(cl::Positional, cl::desc("<input file #1>"), cl::Required);
  23   cl::opt<std::string>
  24   File2(cl::Positional, cl::desc("<input file #2>"), cl::Required);
  25
  26   cl::opt<double>
  27   RelTolerance("r", cl::desc("Relative error tolerated"), cl::init(0));
  28   cl::opt<double>
  29   AbsTolerance("a", cl::desc("Absolute error tolerated"), cl::init(0));
  30 }
  31
  32 int main(int argc, char **argv) {
  33   cl::ParseCommandLineOptions(argc, argv);
  34
  35   std::string ErrorMsg;
  36   int DF = DiffFilesWithTolerance(sys::PathWithStatus(File1),
  37                                   sys::PathWithStatus(File2),
  38                                   AbsTolerance, RelTolerance, &ErrorMsg);
  39   if (!ErrorMsg.empty())
  40     errs() << argv[0] << ": " << ErrorMsg << "\n";
  41   return DF;
  42 }
  43