1 //===-- OptionValueFileColonLine.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 "lldb/Interpreter/OptionValueFileColonLine.h"
10 
11 #include "lldb/DataFormatters/FormatManager.h"
12 #include "lldb/Interpreter/CommandCompletions.h"
13 #include "lldb/Interpreter/CommandInterpreter.h"
14 #include "lldb/Utility/Args.h"
15 #include "lldb/Utility/State.h"
16 
17 using namespace lldb;
18 using namespace lldb_private;
19 
20 // This is an OptionValue for parsing file:line:column specifications.
21 // I set the completer to "source file" which isn't quite right, but we can
22 // only usefully complete in the file name part of it so it should be good
23 // enough.
24 OptionValueFileColonLine::OptionValueFileColonLine() = default;
25 
26 OptionValueFileColonLine::OptionValueFileColonLine(llvm::StringRef input)
27 
28 {
29   SetValueFromString(input, eVarSetOperationAssign);
30 }
31 
32 void OptionValueFileColonLine::DumpValue(const ExecutionContext *exe_ctx,
33                                          Stream &strm, uint32_t dump_mask) {
34   if (dump_mask & eDumpOptionType)
35     strm.Printf("(%s)", GetTypeAsCString());
36   if (dump_mask & eDumpOptionValue) {
37     if (dump_mask & eDumpOptionType)
38       strm.PutCString(" = ");
39 
40     if (m_file_spec)
41       strm << '"' << m_file_spec.GetPath().c_str() << '"';
42     if (m_line_number != LLDB_INVALID_LINE_NUMBER)
43       strm.Printf(":%d", m_line_number);
44     if (m_column_number != LLDB_INVALID_COLUMN_NUMBER)
45       strm.Printf(":%d", m_column_number);
46   }
47 }
48 
49 Status OptionValueFileColonLine::SetValueFromString(llvm::StringRef value,
50                                                     VarSetOperationType op) {
51   Status error;
52   switch (op) {
53   case eVarSetOperationClear:
54     Clear();
55     NotifyValueChanged();
56     break;
57 
58   case eVarSetOperationReplace:
59   case eVarSetOperationAssign:
60     if (value.size() > 0) {
61       // This is in the form filename:linenumber:column.
62       // I wish we could use filename:linenumber.column, that would make the
63       // parsing unambiguous and so much easier...
64       // But clang & gcc both print the output with two : so we're stuck with
65       // the two colons.  Practically, the only actual ambiguity this introduces
66       // is with files like "foo:10", which doesn't seem terribly likely.
67 
68       // Providing the column is optional, so the input value might have one or
69       // two colons.  First pick off the last colon separated piece.
70       // It has to be there, since the line number is required:
71       llvm::StringRef last_piece;
72       llvm::StringRef left_of_last_piece;
73 
74       std::tie(left_of_last_piece, last_piece) = value.rsplit(':');
75       if (last_piece.empty()) {
76         error.SetErrorStringWithFormat("Line specifier must include file and "
77                                        "line: '%s'",
78                                        value.str().c_str());
79         return error;
80       }
81 
82       // Now see if there's another colon and if so pull out the middle piece:
83       // Then check whether the middle piece is an integer.  If it is, then it
84       // was the line number, and if it isn't we're going to assume that there
85       // was a colon in the filename (see note at the beginning of the function)
86       // and ignore it.
87       llvm::StringRef file_name;
88       llvm::StringRef middle_piece;
89 
90       std::tie(file_name, middle_piece) = left_of_last_piece.rsplit(':');
91       if (middle_piece.empty() ||
92           !llvm::to_integer(middle_piece, m_line_number)) {
93         // The middle piece was empty or not an integer, so there were only two
94         // legit pieces; our original division was right.  Reassign the file
95         // name and pull out the line number:
96         file_name = left_of_last_piece;
97         if (!llvm::to_integer(last_piece, m_line_number)) {
98           error.SetErrorStringWithFormat("Bad line number value '%s' in: '%s'",
99                                          last_piece.str().c_str(),
100                                          value.str().c_str());
101           return error;
102         }
103       } else {
104         // There were three pieces, and we've got the line number.  So now
105         // we just need to check the column number which was the last peice.
106         if (!llvm::to_integer(last_piece, m_column_number)) {
107           error.SetErrorStringWithFormat("Bad column value '%s' in: '%s'",
108                                          last_piece.str().c_str(),
109                                          value.str().c_str());
110           return error;
111         }
112       }
113 
114       m_value_was_set = true;
115       m_file_spec.SetFile(file_name, FileSpec::Style::native);
116       NotifyValueChanged();
117     } else {
118       error.SetErrorString("invalid value string");
119     }
120     break;
121 
122   case eVarSetOperationInsertBefore:
123   case eVarSetOperationInsertAfter:
124   case eVarSetOperationRemove:
125   case eVarSetOperationAppend:
126   case eVarSetOperationInvalid:
127     error = OptionValue::SetValueFromString(value, op);
128     break;
129   }
130   return error;
131 }
132 
133 void OptionValueFileColonLine::AutoComplete(CommandInterpreter &interpreter,
134                                             CompletionRequest &request) {
135   lldb_private::CommandCompletions::InvokeCommonCompletionCallbacks(
136       interpreter, m_completion_mask, request, nullptr);
137 }
138