lldb/source/Interpreter/OptionValueBoolean.cpp

//===-- OptionValueBoolean.cpp ------------------------------------*- C++
//-*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "lldb/Interpreter/OptionValueBoolean.h"

// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Stream.h"
#include "lldb/Core/StringList.h"
#include "lldb/Host/PosixApi.h"
#include "lldb/Interpreter/Args.h"
#include "llvm/ADT/STLExtras.h"

using namespace lldb;
using namespace lldb_private;

void OptionValueBoolean::DumpValue(const ExecutionContext *exe_ctx,
                                   Stream &strm, uint32_t dump_mask) {
  if (dump_mask & eDumpOptionType)
    strm.Printf("(%s)", GetTypeAsCString());
  //    if (dump_mask & eDumpOptionName)
  //        DumpQualifiedName (strm);
  if (dump_mask & eDumpOptionValue) {
    if (dump_mask & eDumpOptionType)
      strm.PutCString(" = ");
    strm.PutCString(m_current_value ? "true" : "false");
  }
}

Error OptionValueBoolean::SetValueFromString(llvm::StringRef value_str,
                                             VarSetOperationType op) {
  Error error;
  switch (op) {
  case eVarSetOperationClear:
    Clear();
    NotifyValueChanged();
    break;

  case eVarSetOperationReplace:
  case eVarSetOperationAssign: {
    bool success = false;
    bool value =
        Args::StringToBoolean(value_str.str().c_str(), false, &success);
    if (success) {
      m_value_was_set = true;
      m_current_value = value;
      NotifyValueChanged();
    } else {
      if (value_str.size() == 0)
        error.SetErrorString("invalid boolean string value <empty>");
      else
        error.SetErrorStringWithFormat("invalid boolean string value: '%s'",
                                       value_str.str().c_str());
    }
  } break;

  case eVarSetOperationInsertBefore:
  case eVarSetOperationInsertAfter:
  case eVarSetOperationRemove:
  case eVarSetOperationAppend:
  case eVarSetOperationInvalid:
    error = OptionValue::SetValueFromString(value_str, op);
    break;
  }
  return error;
}

lldb::OptionValueSP OptionValueBoolean::DeepCopy() const {
  return OptionValueSP(new OptionValueBoolean(*this));
}

size_t OptionValueBoolean::AutoComplete(CommandInterpreter &interpreter,
                                        const char *s, int match_start_point,
                                        int max_return_elements,
                                        bool &word_complete,
                                        StringList &matches) {
  word_complete = false;
  matches.Clear();
  struct StringEntry {
    const char *string;
    const size_t length;
  };
  static const StringEntry g_autocomplete_entries[] = {
      {"true", 4}, {"false", 5}, {"on", 2}, {"off", 3},
      {"yes", 3},  {"no", 2},    {"1", 1},  {"0", 1},
  };
  const size_t k_num_autocomplete_entries =
      llvm::array_lengthof(g_autocomplete_entries);

  if (s && s[0]) {
    const size_t s_len = strlen(s);
    for (size_t i = 0; i < k_num_autocomplete_entries; ++i) {
      if (s_len <= g_autocomplete_entries[i].length)
        if (::strncasecmp(s, g_autocomplete_entries[i].string, s_len) == 0)
          matches.AppendString(g_autocomplete_entries[i].string);
    }
  } else {
    // only suggest "true" or "false" by default
    for (size_t i = 0; i < 2; ++i)
      matches.AppendString(g_autocomplete_entries[i].string);
  }
  return matches.GetSize();
}