C++ ConstString::IsEmpty方法代码示例

ConstString PlatformWindows::GetFullNameForDylib(ConstString basename) {
  if (basename.IsEmpty())
    return basename;

  StreamString stream;
  stream.Printf("%s.dll", basename.GetCString());
  return ConstString(stream.GetData());
}

ConstString
PlatformLinux::GetFullNameForDylib (ConstString basename)
{
    if (basename.IsEmpty())
        return basename;
    
    StreamString stream;
    stream.Printf("lib%s.so", basename.GetCString());
    return ConstString(stream.GetData());
}

void
SwiftPersistentExpressionState::SwiftDeclMap::AddDecl (swift::ValueDecl *value_decl, bool check_existing, const ConstString &alias)
{
    std::string name_str;
    
    if (alias.IsEmpty())
    {
        name_str = (value_decl->getName().str());
    }
    else
    {
        name_str.assign(alias.GetCString());
    }
    
    if (!check_existing)
    {
        m_swift_decls.insert(std::make_pair(name_str, value_decl));
        return;
    }
    
    SwiftDeclMapTy::iterator map_end = m_swift_decls.end();
    std::pair<SwiftDeclMapTy::iterator, SwiftDeclMapTy::iterator> found_range = m_swift_decls.equal_range(name_str);
    
    if (found_range.first == map_end)
    {
        m_swift_decls.insert(std::make_pair(name_str, value_decl));
        return;
    }
    else
    {
        SwiftDeclMapTy::iterator cur_item;
        bool done = false;
        for (cur_item = found_range.first; !done && cur_item != found_range.second; cur_item++)
        {
            swift::ValueDecl *cur_decl = (*cur_item).second;
            if (DeclsAreEquivalent(cur_decl, value_decl))
            {
                m_swift_decls.erase (cur_item);
                break;
            }
        }
        
        m_swift_decls.insert(std::make_pair(name_str, value_decl));
    }
}

//.........这里部分代码省略.........
                       platform_module_spec.GetFileSpec())) {
        // printf ("sdk[%u]: '%s'\n", sdk_idx, local_file.GetPath().c_str());

        error = ResolveExecutable(platform_module_spec, module_sp, nullptr);
        if (module_sp) {
          // Remember the index of the last SDK that we found a file
          // in in case the wrong SDK was selected.
          m_last_module_sdk_idx = sdk_idx;
          error.Clear();
          return error;
        }
      }
    }
  }
  // Not the module we are looking for... Nothing to see here...
  module_sp.reset();

  // This may not be an SDK-related module.  Try whether we can bring in the
  // thing to our local cache.
  error = GetSharedModuleWithLocalCache(module_spec, module_sp,
                                        module_search_paths_ptr,
                                        old_module_sp_ptr, did_create_ptr);
  if (error.Success())
    return error;

  // See if the file is present in any of the module_search_paths_ptr
  // directories.
  if (!module_sp && module_search_paths_ptr && platform_file) {
    // create a vector of all the file / directory names in platform_file
    // e.g. this might be
    // /System/Library/PrivateFrameworks/UIFoundation.framework/UIFoundation
    //
    // We'll need to look in the module_search_paths_ptr directories for
    // both "UIFoundation" and "UIFoundation.framework" -- most likely the
    // latter will be the one we find there.

    FileSpec platform_pull_apart(platform_file);
    std::vector<std::string> path_parts;
    ConstString unix_root_dir("/");
    while (true) {
      ConstString part = platform_pull_apart.GetLastPathComponent();
      platform_pull_apart.RemoveLastPathComponent();
      if (part.IsEmpty() || part == unix_root_dir)
        break;
      path_parts.push_back(part.AsCString());
    }
    const size_t path_parts_size = path_parts.size();

    size_t num_module_search_paths = module_search_paths_ptr->GetSize();
    for (size_t i = 0; i < num_module_search_paths; ++i) {
      // Create a new FileSpec with this module_search_paths_ptr
      // plus just the filename ("UIFoundation"), then the parent
      // dir plus filename ("UIFoundation.framework/UIFoundation")
      // etc - up to four names (to handle "Foo.framework/Contents/MacOS/Foo")

      for (size_t j = 0; j < 4 && j < path_parts_size - 1; ++j) {
        FileSpec path_to_try(module_search_paths_ptr->GetFileSpecAtIndex(i));

        // Add the components backwards.  For
        // .../PrivateFrameworks/UIFoundation.framework/UIFoundation
        // path_parts is
        //   [0] UIFoundation
        //   [1] UIFoundation.framework
        //   [2] PrivateFrameworks
        //
        // and if 'j' is 2, we want to append path_parts[1] and then
        // path_parts[0], aka
        // 'UIFoundation.framework/UIFoundation', to the module_search_paths_ptr
        // path.

        for (int k = j; k >= 0; --k) {
          path_to_try.AppendPathComponent(path_parts[k]);
        }

        if (path_to_try.Exists()) {
          ModuleSpec new_module_spec(module_spec);
          new_module_spec.GetFileSpec() = path_to_try;
          Error new_error(Platform::GetSharedModule(
              new_module_spec, process, module_sp, NULL, old_module_sp_ptr,
              did_create_ptr));

          if (module_sp) {
            module_sp->SetPlatformFileSpec(path_to_try);
            return new_error;
          }
        }
      }
    }
  }

  const bool always_create = false;
  error = ModuleList::GetSharedModule(
      module_spec, module_sp, module_search_paths_ptr, old_module_sp_ptr,
      did_create_ptr, always_create);

  if (module_sp)
    module_sp->SetPlatformFileSpec(platform_file);

  return error;
}

bool
ObjCLanguage::GetFormatterPrefixSuffix (ValueObject& valobj, ConstString type_hint,
                                        std::string& prefix, std::string& suffix)
{
    static ConstString g_CFBag("CFBag");
    static ConstString g_CFBinaryHeap("CFBinaryHeap");
    
    static ConstString g_NSNumberChar("NSNumber:char");
    static ConstString g_NSNumberShort("NSNumber:short");
    static ConstString g_NSNumberInt("NSNumber:int");
    static ConstString g_NSNumberLong("NSNumber:long");
    static ConstString g_NSNumberFloat("NSNumber:float");
    static ConstString g_NSNumberDouble("NSNumber:double");
    
    static ConstString g_NSData("NSData");
    static ConstString g_NSArray("NSArray");
    static ConstString g_NSString("NSString");
    static ConstString g_NSStringStar("NSString*");
    
    if (type_hint.IsEmpty())
        return false;
    
    prefix.clear();
    suffix.clear();
    
    if (type_hint == g_CFBag ||
        type_hint == g_CFBinaryHeap)
    {
        prefix = "@";
        return true;
    }
    
    if (type_hint == g_NSNumberChar)
    {
        prefix = "(char)";
        return true;
    }
    if (type_hint == g_NSNumberShort)
    {
        prefix = "(short)";
        return true;
    }
    if (type_hint == g_NSNumberInt)
    {
        prefix = "(int)";
        return true;
    }
    if (type_hint == g_NSNumberLong)
    {
        prefix = "(long)";
        return true;
    }
    if (type_hint == g_NSNumberFloat)
    {
        prefix = "(float)";
        return true;
    }
    if (type_hint == g_NSNumberDouble)
    {
        prefix = "(double)";
        return true;
    }
    
    if (type_hint == g_NSData ||
        type_hint == g_NSArray)
    {
        prefix = "@\"";
        suffix = "\"";
        return true;
    }
    
    if (type_hint == g_NSString ||
        type_hint == g_NSStringStar)
    {
        prefix = "@";
        return true;
    }
    
    return false;
}