File: platform.hpp

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#pragma once

namespace nall {

auto activepath() -> string {
  char path[PATH_MAX] = "";
  auto unused = getcwd(path, PATH_MAX);
  string result = path;
  if(!result) result = ".";
  result.transform("\\", "/");
  if(result.endsWith("/") == false) result.append("/");
  return result;
}

auto realpath(rstring name) -> string {
  string result;
  char path[PATH_MAX] = "";
  if(::realpath(name, path)) result = pathname(string{path}.transform("\\", "/"));
  if(!result) return activepath();
  result.transform("\\", "/");
  if(result.endsWith("/") == false) result.append("/");
  return result;
}

auto programpath() -> string {
  #if defined(PLATFORM_WINDOWS)
  wchar_t path[PATH_MAX] = L"";
  GetModuleFileName(nullptr, path, PATH_MAX);
  string result = (const char*)utf8_t(path);
  result.transform("\\", "/");
  return realpath(result);
  #else
  Dl_info info;
  dladdr((void*)&programpath, &info);
  return realpath(info.dli_fname);
  #endif
}

// /
// c:/
auto rootpath() -> string {
  #if defined(PLATFORM_WINDOWS)
  wchar_t path[PATH_MAX] = L"";
  SHGetFolderPathW(nullptr, CSIDL_WINDOWS | CSIDL_FLAG_CREATE, nullptr, 0, path);
  string result = (const char*)utf8_t(path);
  result.transform("\\", "/");
  return slice(result, 0, 3);
  #else
  return "/";
  #endif
}

// /home/username/
// c:/users/username/
auto userpath() -> string {
  #if defined(PLATFORM_WINDOWS)
  wchar_t path[PATH_MAX] = L"";
  SHGetFolderPathW(nullptr, CSIDL_PROFILE | CSIDL_FLAG_CREATE, nullptr, 0, path);
  string result = (const char*)utf8_t(path);
  result.transform("\\", "/");
  #else
  struct passwd* userinfo = getpwuid(getuid());
  string result = userinfo->pw_dir;
  #endif
  if(!result) result = ".";
  if(result.endsWith("/") == false) result.append("/");
  return result;
}

// /home/username/.config/
// c:/users/username/appdata/roaming/
auto configpath() -> string {
  #if defined(PLATFORM_WINDOWS)
  wchar_t path[PATH_MAX] = L"";
  SHGetFolderPathW(nullptr, CSIDL_APPDATA | CSIDL_FLAG_CREATE, nullptr, 0, path);
  string result = (const char*)utf8_t(path);
  result.transform("\\", "/");
  #elif defined(PLATFORM_MACOSX)
  string result = {userpath(), "Library/Application Support/"};
  #else
  string result;
  const char *env = getenv("XDG_CONFIG_HOME");
  if(env) {
    result.append(env);
  } else {
    result = {userpath(), ".config/"};
  }
  #endif
  if(!result) result = ".";
  if(result.endsWith("/") == false) result.append("/");
  return result;
}

// /home/username/.local/share/
// c:/users/username/appdata/local/
auto localpath() -> string {
  #if defined(PLATFORM_WINDOWS)
  wchar_t path[PATH_MAX] = L"";
  SHGetFolderPathW(nullptr, CSIDL_LOCAL_APPDATA | CSIDL_FLAG_CREATE, nullptr, 0, path);
  string result = (const char*)utf8_t(path);
  result.transform("\\", "/");
  #elif defined(PLATFORM_MACOSX)
  string result = {userpath(), "Library/Application Support/"};
  #else
  string result = {userpath(), ".local/share/"};
  #endif
  if(!result) result = ".";
  if(result.endsWith("/") == false) result.append("/");
  return result;
}

// /usr/share
// /Library/Application Support/
// c:/ProgramData/
auto sharedpath() -> string {
  #if defined(PLATFORM_WINDOWS)
  wchar_t path[PATH_MAX] = L"";
  SHGetFolderPathW(nullptr, CSIDL_COMMON_APPDATA | CSIDL_FLAG_CREATE, nullptr, 0, path);
  string result = (const char*)utf8_t(path);
  result.transform("\\", "/");
  #elif defined(PLATFORM_MACOSX)
  string result = "/Library/Application Support/";
  #else
  string result = "/usr/share/";
  #endif
  if(!result) result = ".";
  if(result.endsWith("/") == false) result.append("/");
  return result;
}

// /tmp
// c:/users/username/AppData/Local/Temp/
auto temppath() -> string {
  #if defined(PLATFORM_WINDOWS)
  wchar_t path[PATH_MAX] = L"";
  GetTempPathW(PATH_MAX, path);
  string result = (const char*)utf8_t(path);
  result.transform("\\", "/");
  #elif defined(P_tmpdir)
  string result = P_tmpdir;
  #else
  string result = "/tmp/";
  #endif
  if(result.endsWith("/") == false) result.append("/");
  return result;
}

}