lldb/source/Interpreter/OptionValueFileColonLine.cpp

   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 = Status::FromErrorStringWithFormat(
  77             "Line specifier must include file and "
  78             "line: '%s'",
  79             value.str().c_str());
  80         return error;
  81       }
  82
  83       // Now see if there's another colon and if so pull out the middle piece:
  84       // Then check whether the middle piece is an integer.  If it is, then it
  85       // was the line number, and if it isn't we're going to assume that there
  86       // was a colon in the filename (see note at the beginning of the function)
  87       // and ignore it.
  88       llvm::StringRef file_name;
  89       llvm::StringRef middle_piece;
  90
  91       std::tie(file_name, middle_piece) = left_of_last_piece.rsplit(':');
  92       if (middle_piece.empty() ||
  93           !llvm::to_integer(middle_piece, m_line_number)) {
  94         // The middle piece was empty or not an integer, so there were only two
  95         // legit pieces; our original division was right.  Reassign the file
  96         // name and pull out the line number:
  97         file_name = left_of_last_piece;
  98         if (!llvm::to_integer(last_piece, m_line_number)) {
  99           error = Status::FromErrorStringWithFormat(
 100               "Bad line number value '%s' in: '%s'", last_piece.str().c_str(),
 101               value.str().c_str());
 102           return error;
 103         }
 104       } else {
 105         // There were three pieces, and we've got the line number.  So now
 106         // we just need to check the column number which was the last peice.
 107         if (!llvm::to_integer(last_piece, m_column_number)) {
 108           error = Status::FromErrorStringWithFormat(
 109               "Bad column value '%s' in: '%s'", last_piece.str().c_str(),
 110               value.str().c_str());
 111           return error;
 112         }
 113       }
 114
 115       m_value_was_set = true;
 116       m_file_spec.SetFile(file_name, FileSpec::Style::native);
 117       NotifyValueChanged();
 118     } else {
 119       error = Status::FromErrorString("invalid value string");
 120     }
 121     break;
 122
 123   case eVarSetOperationInsertBefore:
 124   case eVarSetOperationInsertAfter:
 125   case eVarSetOperationRemove:
 126   case eVarSetOperationAppend:
 127   case eVarSetOperationInvalid:
 128     error = OptionValue::SetValueFromString(value, op);
 129     break;
 130   }
 131   return error;
 132 }
 133
 134 void OptionValueFileColonLine::AutoComplete(CommandInterpreter &interpreter,
 135                                             CompletionRequest &request) {
 136   lldb_private::CommandCompletions::InvokeCommonCompletionCallbacks(
 137       interpreter, m_completion_mask, request, nullptr);
 138 }