Quelle nsTDependentSubstring.cpp Sprache: C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

// FIXME: Due to an include cycle, we need to include `nsTSubstring` first.
#include "nsTSubstring.h"
#include "nsTDependentSubstring.h"

template <typename T>
void nsTDependentSubstring<T>::Rebind(const substring_type& str,
                                      size_type startPos, size_type length) {
  // If we currently own a buffer, release it.
  this->Finalize();

  size_type strLength = str.Length();

  if (startPos > strLength) {
    startPos = strLength;
  }

  char_type* newData =
      const_cast<char_type*>(static_cast<const char_type*>(str.Data())) +
      startPos;
  size_type newLength = XPCOM_MIN(length, strLength - startPos);
  DataFlags newDataFlags = DataFlags(0);
  this->SetData(newData, newLength, newDataFlags);
}

template <typename T>
void nsTDependentSubstring<T>::Rebind(const char_type* data, size_type length) {
  NS_ASSERTION(data, "nsTDependentSubstring must wrap a non-NULL buffer");

  // If we currently own a buffer, release it.
  this->Finalize();

  char_type* newData =
      const_cast<char_type*>(static_cast<const char_type*>(data));
  size_type newLength = length;
  DataFlags newDataFlags = DataFlags(0);
  this->SetData(newData, newLength, newDataFlags);
}

template <typename T>
void nsTDependentSubstring<T>::Rebind(const char_type* aStart,
                                      const char_type* aEnd) {
  MOZ_RELEASE_ASSERT(aStart <= aEnd, "Overflow!");
  this->Rebind(aStart, size_type(aEnd - aStart));
}

template <typename T>
nsTDependentSubstring<T>::nsTDependentSubstring(const char_type* aStart,
                                                const char_type* aEnd)
    : substring_type(const_cast<char_type*>(aStart), aEnd - aStart,
                     DataFlags(0), ClassFlags(0)) {
  MOZ_RELEASE_ASSERT(aStart <= aEnd, "Overflow!");
}

#if defined(MOZ_USE_CHAR16_WRAPPER)
template <typename T>
template <typename Q, typename EnableIfChar16>
nsTDependentSubstring<T>::nsTDependentSubstring(char16ptr_t aStart,
                                                char16ptr_t aEnd)
    : substring_type(static_cast<const char16_t*>(aStart),
                     static_cast<const char16_t*>(aEnd)) {
  MOZ_RELEASE_ASSERT(static_cast<const char16_t*>(aStart) <=
                         static_cast<const char16_t*>(aEnd),
                     "Overflow!");
}
#endif

template <typename T>
nsTDependentSubstring<T>::nsTDependentSubstring(const const_iterator& aStart,
                                                const const_iterator& aEnd)
    : substring_type(const_cast<char_type*>(aStart.get()),
                     aEnd.get() - aStart.get(), DataFlags(0), ClassFlags(0)) {
  MOZ_RELEASE_ASSERT(aStart.get() <= aEnd.get(), "Overflow!");
}

template <typename T>
const nsTDependentSubstring<T> Substring(const T* aStart, const T* aEnd) {
  MOZ_RELEASE_ASSERT(aStart <= aEnd, "Overflow!");
  return nsTDependentSubstring<T>(aStart, aEnd);
}

template nsTDependentSubstring<char> const Substring<char>(char const*,
                                                           char const*);
template nsTDependentSubstring<char16_t> const Substring<char16_t>(
    char16_t const*, char16_t const*);

#if defined(MOZ_USE_CHAR16_WRAPPER)
const nsTDependentSubstring<char16_t> Substring(char16ptr_t aData,
                                                size_t aLength) {
  return nsTDependentSubstring<char16_t>(aData, aLength);
}

const nsTDependentSubstring<char16_t> Substring(char16ptr_t aStart,
                                                char16ptr_t aEnd) {
  return Substring(static_cast<const char16_t*>(aStart),
                   static_cast<const char16_t*>(aEnd));
}
#endif

template class nsTDependentSubstring<char>;
template class nsTDependentSubstring<char16_t>;

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