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
54