//===-- FileSpecList.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/Core/FileSpecList.h"

#include "lldb/Utility/ConstString.h" // for ConstString
#include "lldb/Utility/Stream.h"

#include <utility> // for find

#include <stdint.h> // for UINT32_MAX

using namespace lldb_private;
using namespace std;

FileSpecList::FileSpecList() : m_files() {}

FileSpecList::FileSpecList(const FileSpecList &rhs) = default;

FileSpecList::~FileSpecList() = default;

//------------------------------------------------------------------
// Assignment operator
//------------------------------------------------------------------
const FileSpecList &FileSpecList::operator=(const FileSpecList &rhs) {
  if (this != &rhs)
    m_files = rhs.m_files;
  return *this;
}

//------------------------------------------------------------------
// Append the "file_spec" to the end of the file spec list.
//------------------------------------------------------------------
void FileSpecList::Append(const FileSpec &file_spec) {
  m_files.push_back(file_spec);
}

//------------------------------------------------------------------
// Only append the "file_spec" if this list doesn't already contain
// it.
//
// Returns true if "file_spec" was added, false if this list already
// contained a copy of "file_spec".
//------------------------------------------------------------------
bool FileSpecList::AppendIfUnique(const FileSpec &file_spec) {
  collection::iterator pos, end = m_files.end();
  if (find(m_files.begin(), end, file_spec) == end) {
    m_files.push_back(file_spec);
    return true;
  }
  return false;
}

//------------------------------------------------------------------
// Clears the file list.
//------------------------------------------------------------------
void FileSpecList::Clear() { m_files.clear(); }

//------------------------------------------------------------------
// Dumps the file list to the supplied stream pointer "s".
//------------------------------------------------------------------
void FileSpecList::Dump(Stream *s, const char *separator_cstr) const {
  collection::const_iterator pos, end = m_files.end();
  for (pos = m_files.begin(); pos != end; ++pos) {
    pos->Dump(s);
    if (separator_cstr && ((pos + 1) != end))
      s->PutCString(separator_cstr);
  }
}

//------------------------------------------------------------------
// Find the index of the file in the file spec list that matches
// "file_spec" starting "start_idx" entries into the file spec list.
//
// Returns the valid index of the file that matches "file_spec" if
// it is found, else std::numeric_limits<uint32_t>::max() is returned.
//------------------------------------------------------------------
size_t FileSpecList::FindFileIndex(size_t start_idx, const FileSpec &file_spec,
                                   bool full, bool remove_dots) const {
  const size_t num_files = m_files.size();

  // When looking for files, we will compare only the filename if the
  // FILE_SPEC argument is empty
  bool compare_filename_only = file_spec.GetDirectory().IsEmpty();

  for (size_t idx = start_idx; idx < num_files; ++idx) {
    if (compare_filename_only) {
      if (ConstString::Equals(
              m_files[idx].GetFilename(), file_spec.GetFilename(),
              file_spec.IsCaseSensitive() || m_files[idx].IsCaseSensitive()))
        return idx;
    } else {
      if (FileSpec::Equal(m_files[idx], file_spec, full, remove_dots))
        return idx;
    }
  }

  // We didn't find the file, return an invalid index
  return UINT32_MAX;
}

//------------------------------------------------------------------
// Returns the FileSpec object at index "idx". If "idx" is out of
// range, then an empty FileSpec object will be returned.
//------------------------------------------------------------------
const FileSpec &FileSpecList::GetFileSpecAtIndex(size_t idx) const {
  if (idx < m_files.size())
    return m_files[idx];
  static FileSpec g_empty_file_spec;
  return g_empty_file_spec;
}

const FileSpec *FileSpecList::GetFileSpecPointerAtIndex(size_t idx) const {
  if (idx < m_files.size())
    return &m_files[idx];
  return nullptr;
}

//------------------------------------------------------------------
// Return the size in bytes that this object takes in memory. This
// returns the size in bytes of this object's member variables and
// any FileSpec objects its member variables contain, the result
// doesn't not include the string values for the directories any
// filenames as those are in shared string pools.
//------------------------------------------------------------------
size_t FileSpecList::MemorySize() const {
  size_t mem_size = sizeof(FileSpecList);
  collection::const_iterator pos, end = m_files.end();
  for (pos = m_files.begin(); pos != end; ++pos) {
    mem_size += pos->MemorySize();
  }

  return mem_size;
}

//------------------------------------------------------------------
// Return the number of files in the file spec list.
//------------------------------------------------------------------
size_t FileSpecList::GetSize() const { return m_files.size(); }

size_t FileSpecList::GetFilesMatchingPartialPath(const char *path,
                                                 bool dir_okay,
                                                 FileSpecList &matches) {
#if 0 // FIXME: Just sketching...
    matches.Clear();
    using namespace llvm::sys::fs;
    file_status stats;
    if (status(path, stats, false))
      return 0;
    if (exists(stats)) {
      if (is_symlink_file(stats)) {
        // Shouldn't there be a method that realpath's a file?
      }
      if (is_regular_file(stats) || (is_directory(stats) && dir_okay)) {
        matches.Append(FileSpec(path));
        return 1;
      } else if (is_directory(stats)) {
        // Fill the match list with all the files in the directory:
      } else {
        return 0;
      }
    } else {
        ConstString dir_name = path_spec.GetDirectory();
        ConstString file_name = GetFilename();
        if (dir_name == nullptr)
        {
            // Match files in the CWD.
        }
        else
        {
            // Match files in the given directory:
        }
    }
#endif
  return 0;
}