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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | |
| 2 | //===--- CommandLineSourceLoc.h - Parsing for source locations-*- C++ -*---===// |
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| 3 | // |
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| 4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 5 | // See https://llvm.org/LICENSE.txt for license information. |
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| 6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 7 | // |
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| 8 | //===----------------------------------------------------------------------===// |
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| 9 | // |
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| 10 | // Command line parsing for source locations. |
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| 11 | // |
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| 12 | //===----------------------------------------------------------------------===// |
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| 13 | |||
| 14 | #ifndef LLVM_CLANG_FRONTEND_COMMANDLINESOURCELOC_H |
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| 15 | #define LLVM_CLANG_FRONTEND_COMMANDLINESOURCELOC_H |
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| 16 | |||
| 17 | #include "clang/Basic/LLVM.h" |
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| 18 | #include "llvm/Support/CommandLine.h" |
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| 19 | #include "llvm/Support/raw_ostream.h" |
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| 20 | #include <optional> |
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| 21 | |||
| 22 | namespace clang { |
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| 23 | |||
| 24 | /// A source location that has been parsed on the command line. |
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| 25 | struct ParsedSourceLocation { |
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| 26 | std::string FileName; |
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| 27 | unsigned Line; |
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| 28 | unsigned Column; |
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| 29 | |||
| 30 | public: |
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| 31 | /// Construct a parsed source location from a string; the Filename is empty on |
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| 32 | /// error. |
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| 33 | static ParsedSourceLocation FromString(StringRef Str) { |
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| 34 | ParsedSourceLocation PSL; |
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| 35 | std::pair<StringRef, StringRef> ColSplit = Str.rsplit(':'); |
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| 36 | std::pair<StringRef, StringRef> LineSplit = |
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| 37 | ColSplit.first.rsplit(':'); |
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| 38 | |||
| 39 | // If both tail splits were valid integers, return success. |
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| 40 | if (!ColSplit.second.getAsInteger(10, PSL.Column) && |
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| 41 | !LineSplit.second.getAsInteger(10, PSL.Line)) { |
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| 42 | PSL.FileName = std::string(LineSplit.first); |
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| 43 | |||
| 44 | // On the command-line, stdin may be specified via "-". Inside the |
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| 45 | // compiler, stdin is called "<stdin>". |
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| 46 | if (PSL.FileName == "-") |
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| 47 | PSL.FileName = "<stdin>"; |
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| 48 | } |
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| 49 | |||
| 50 | return PSL; |
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| 51 | } |
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| 52 | |||
| 53 | /// Serialize ParsedSourceLocation back to a string. |
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| 54 | std::string ToString() const { |
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| 55 | return (llvm::Twine(FileName == "<stdin>" ? "-" : FileName) + ":" + |
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| 56 | Twine(Line) + ":" + Twine(Column)) |
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| 57 | .str(); |
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| 58 | } |
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| 59 | }; |
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| 60 | |||
| 61 | /// A source range that has been parsed on the command line. |
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| 62 | struct ParsedSourceRange { |
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| 63 | std::string FileName; |
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| 64 | /// The starting location of the range. The first element is the line and |
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| 65 | /// the second element is the column. |
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| 66 | std::pair<unsigned, unsigned> Begin; |
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| 67 | /// The ending location of the range. The first element is the line and the |
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| 68 | /// second element is the column. |
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| 69 | std::pair<unsigned, unsigned> End; |
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| 70 | |||
| 71 | /// Returns a parsed source range from a string or std::nullopt if the string |
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| 72 | /// is invalid. |
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| 73 | /// |
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| 74 | /// These source string has the following format: |
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| 75 | /// |
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| 76 | /// file:start_line:start_column[-end_line:end_column] |
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| 77 | /// |
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| 78 | /// If the end line and column are omitted, the starting line and columns |
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| 79 | /// are used as the end values. |
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| 80 | static std::optional<ParsedSourceRange> fromString(StringRef Str) { |
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| 81 | std::pair<StringRef, StringRef> RangeSplit = Str.rsplit('-'); |
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| 82 | unsigned EndLine, EndColumn; |
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| 83 | bool HasEndLoc = false; |
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| 84 | if (!RangeSplit.second.empty()) { |
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| 85 | std::pair<StringRef, StringRef> Split = RangeSplit.second.rsplit(':'); |
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| 86 | if (Split.first.getAsInteger(10, EndLine) || |
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| 87 | Split.second.getAsInteger(10, EndColumn)) { |
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| 88 | // The string does not end in end_line:end_column, so the '-' |
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| 89 | // probably belongs to the filename which menas the whole |
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| 90 | // string should be parsed. |
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| 91 | RangeSplit.first = Str; |
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| 92 | } else |
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| 93 | HasEndLoc = true; |
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| 94 | } |
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| 95 | auto Begin = ParsedSourceLocation::FromString(RangeSplit.first); |
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| 96 | if (Begin.FileName.empty()) |
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| 97 | return std::nullopt; |
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| 98 | if (!HasEndLoc) { |
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| 99 | EndLine = Begin.Line; |
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| 100 | EndColumn = Begin.Column; |
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| 101 | } |
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| 102 | return ParsedSourceRange{std::move(Begin.FileName), |
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| 103 | {Begin.Line, Begin.Column}, |
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| 104 | {EndLine, EndColumn}}; |
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| 105 | } |
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| 106 | }; |
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| 107 | } |
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| 108 | |||
| 109 | namespace llvm { |
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| 110 | namespace cl { |
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| 111 | /// Command-line option parser that parses source locations. |
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| 112 | /// |
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| 113 | /// Source locations are of the form filename:line:column. |
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| 114 | template<> |
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| 115 | class parser<clang::ParsedSourceLocation> final |
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| 116 | : public basic_parser<clang::ParsedSourceLocation> { |
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| 117 | public: |
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| 118 | inline bool parse(Option &O, StringRef ArgName, StringRef ArgValue, |
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| 119 | clang::ParsedSourceLocation &Val); |
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| 120 | }; |
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| 121 | |||
| 122 | bool |
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| 123 | parser<clang::ParsedSourceLocation>:: |
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| 124 | parse(Option &O, StringRef ArgName, StringRef ArgValue, |
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| 125 | clang::ParsedSourceLocation &Val) { |
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| 126 | using namespace clang; |
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| 127 | |||
| 128 | Val = ParsedSourceLocation::FromString(ArgValue); |
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| 129 | if (Val.FileName.empty()) { |
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| 130 | errs() << "error: " |
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| 131 | << "source location must be of the form filename:line:column\n"; |
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| 132 | return true; |
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| 133 | } |
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| 134 | |||
| 135 | return false; |
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| 136 | } |
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| 137 | } |
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| 138 | } |
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| 139 | |||
| 140 | #endif |