/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "adb_utils.h"

#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

bool getcwd(std::string* s) {
  char* cwd = getcwd(nullptr, 0);
  if (cwd != nullptr) *s = cwd;
  free(cwd);
  return (cwd != nullptr);
}

bool directory_exists(const std::string& path) {
  struct stat sb;
  return lstat(path.c_str(), &sb) != -1 && S_ISDIR(sb.st_mode);
}

static bool should_escape(const char c) {
  return (c == ' ' || c == '\'' || c == '"' || c == '\\' || c == '(' || c == ')');
}

std::string escape_arg(const std::string& s) {
  // Preserve empty arguments.
  if (s.empty()) return "\"\"";

  std::string result(s);
  for (auto it = result.begin(); it != result.end(); ++it) {
      if (should_escape(*it)) {
          it = result.insert(it, '\\') + 1;
      }
  }
  return result;
}