xpcom/base/nsIDUtils.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef XPCOM_BASE_NSIDUTILS_H_
   8 #define XPCOM_BASE_NSIDUTILS_H_
   9
  10 #include "nsID.h"
  11 #include "nsString.h"
  12 #include "nsTString.h"
  13
  14 /**
  15  * Trims the brackets around the nsID string, since it wraps its ID with
  16  * brackets: {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}.
  17  */
  18 template <typename T>
  19 class NSID_TrimBrackets : public nsTAutoString<T> {
  20  public:
  21   explicit NSID_TrimBrackets(const nsID& aID) {
  22     nsIDToCString toCString(aID);
  23     // The string from nsIDToCString::get() includes a null terminator.
  24     // Thus this trims 3 characters: `{`, `}`, and the null terminator.
  25     this->AssignASCII(toCString.get() + 1, NSID_LENGTH - 3);
  26   }
  27 };
  28
  29 using NSID_TrimBracketsUTF16 = NSID_TrimBrackets<char16_t>;
  30 using NSID_TrimBracketsASCII = NSID_TrimBrackets<char>;
  31
  32 #endif  // XPCOM_BASE_NSIDUTILS_H_