lldb/source/Interpreter/OptionValueFileSpec.cpp

//===-- OptionValueFileSpec.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/OptionValueFileSpec.h"

#include "lldb/Core/State.h"
#include "lldb/DataFormatters/FormatManager.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Interpreter/Args.h"
#include "lldb/Interpreter/CommandCompletions.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Utility/DataBufferLLVM.h"

using namespace lldb;
using namespace lldb_private;

OptionValueFileSpec::OptionValueFileSpec(bool resolve)
    : OptionValue(), m_current_value(), m_default_value(), m_data_sp(),
      m_data_mod_time(),
      m_completion_mask(CommandCompletions::eDiskFileCompletion),
      m_resolve(resolve) {}

OptionValueFileSpec::OptionValueFileSpec(const FileSpec &value, bool resolve)
    : OptionValue(), m_current_value(value), m_default_value(value),
      m_data_sp(), m_data_mod_time(),
      m_completion_mask(CommandCompletions::eDiskFileCompletion),
      m_resolve(resolve) {}

OptionValueFileSpec::OptionValueFileSpec(const FileSpec &current_value,
                                         const FileSpec &default_value,
                                         bool resolve)
    : OptionValue(), m_current_value(current_value),
      m_default_value(default_value), m_data_sp(), m_data_mod_time(),
      m_completion_mask(CommandCompletions::eDiskFileCompletion),
      m_resolve(resolve) {}

void OptionValueFileSpec::DumpValue(const ExecutionContext *exe_ctx,
                                    Stream &strm, uint32_t dump_mask) {
  if (dump_mask & eDumpOptionType)
    strm.Printf("(%s)", GetTypeAsCString());
  if (dump_mask & eDumpOptionValue) {
    if (dump_mask & eDumpOptionType)
      strm.PutCString(" = ");

    if (m_current_value) {
      strm << '"' << m_current_value.GetPath().c_str() << '"';
    }
  }
}

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

  case eVarSetOperationReplace:
  case eVarSetOperationAssign:
    if (value.size() > 0) {
      // The setting value may have whitespace, double-quotes, or single-quotes
      // around the file
      // path to indicate that internal spaces are not word breaks.  Strip off
      // any ws & quotes
      // from the start and end of the file path - we aren't doing any word //
      // breaking here so
      // the quoting is unnecessary.  NB this will cause a problem if someone
      // tries to specify
      // a file path that legitimately begins or ends with a " or ' character,
      // or whitespace.
      value = value.trim("\"' \t");
      m_value_was_set = true;
      m_current_value.SetFile(value.str(), m_resolve);
      m_data_sp.reset();
      m_data_mod_time = llvm::sys::TimePoint<>();
      NotifyValueChanged();
    } else {
      error.SetErrorString("invalid value string");
    }
    break;

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

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

size_t OptionValueFileSpec::AutoComplete(
    CommandInterpreter &interpreter, llvm::StringRef s, int match_start_point,
    int max_return_elements, bool &word_complete, StringList &matches) {
  word_complete = false;
  matches.Clear();
  CommandCompletions::InvokeCommonCompletionCallbacks(
      interpreter, m_completion_mask, s, match_start_point, max_return_elements,
      nullptr, word_complete, matches);
  return matches.GetSize();
}

const lldb::DataBufferSP &
OptionValueFileSpec::GetFileContents(bool null_terminate) {
  if (m_current_value) {
    const auto file_mod_time = FileSystem::GetModificationTime(m_current_value);
    if (m_data_sp && m_data_mod_time == file_mod_time)
      return m_data_sp;
    m_data_sp = DataBufferLLVM::CreateFromPath(m_current_value.GetPath(),
                                               null_terminate);
    m_data_mod_time = file_mod_time;
  }
  return m_data_sp;
}