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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 
main(int argc,char ** argv)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 
44