llvm/lib/ObjCopy/CommonConfig.cpp

   1 //===- CommonConfig.cpp ---------------------------------------------------===//
   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 #include "llvm/ObjCopy/CommonConfig.h"
  10 #include "llvm/Support/Errc.h"
  11
  12 namespace llvm {
  13 namespace objcopy {
  14
  15 Expected<NameOrPattern>
  16 NameOrPattern::create(StringRef Pattern, MatchStyle MS,
  17                       function_ref<Error(Error)> ErrorCallback) {
  18   switch (MS) {
  19   case MatchStyle::Literal:
  20     return NameOrPattern(Pattern);
  21   case MatchStyle::Wildcard: {
  22     SmallVector<char, 32> Data;
  23     bool IsPositiveMatch = !Pattern.consume_front("!");
  24     Expected<GlobPattern> GlobOrErr = GlobPattern::create(Pattern);
  25
  26     // If we couldn't create it as a glob, report the error, but try again
  27     // with a literal if the error reporting is non-fatal.
  28     if (!GlobOrErr) {
  29       if (Error E = ErrorCallback(GlobOrErr.takeError()))
  30         return std::move(E);
  31       return create(Pattern, MatchStyle::Literal, ErrorCallback);
  32     }
  33
  34     return NameOrPattern(std::make_shared<GlobPattern>(*GlobOrErr),
  35                          IsPositiveMatch);
  36   }
  37   case MatchStyle::Regex: {
  38     Regex RegEx(Pattern);
  39     std::string Err;
  40     if (!RegEx.isValid(Err))
  41       return createStringError(errc::invalid_argument,
  42                                "cannot compile regular expression \'" +
  43                                    Pattern + "\': " + Err);
  44     SmallVector<char, 32> Data;
  45     return NameOrPattern(std::make_shared<Regex>(
  46         ("^" + Pattern.ltrim('^').rtrim('$') + "$").toStringRef(Data)));
  47   }
  48   }
  49   llvm_unreachable("Unhandled llvm.objcopy.MatchStyle enum");
  50 }
  51
  52 } // end namespace objcopy
  53 } // end namespace llvm