gecko-dev/xpcom/string/public/nsTDependentSubstring.h

111 lines
3.7 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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/. */
// IWYU pragma: private, include "nsString.h"
/**
* nsTDependentSubstring_CharT
*
* A string class which wraps an external array of string characters. It
* is the client code's responsibility to ensure that the external buffer
* remains valid for a long as the string is alive.
*
* NAMES:
* nsDependentSubstring for wide characters
* nsDependentCSubstring for narrow characters
*/
class nsTDependentSubstring_CharT : public nsTSubstring_CharT
{
public:
typedef nsTDependentSubstring_CharT self_type;
public:
void Rebind( const substring_type&, uint32_t startPos, uint32_t length = size_type(-1) );
void Rebind( const char_type* data, size_type length );
void Rebind( const char_type* start, const char_type* end )
{
Rebind(start, size_type(end - start));
}
nsTDependentSubstring_CharT( const substring_type& str, uint32_t startPos, uint32_t length = size_type(-1) )
: substring_type()
{
Rebind(str, startPos, length);
}
nsTDependentSubstring_CharT( const char_type* data, size_type length )
: substring_type(const_cast<char_type*>(data), length, F_NONE) {}
nsTDependentSubstring_CharT( const char_type* start, const char_type* end )
: substring_type(const_cast<char_type*>(start), uint32_t(end - start), F_NONE) {}
#if defined(CharT_is_PRUnichar) && defined(MOZ_USE_CHAR16_WRAPPER)
nsTDependentSubstring_CharT( char16ptr_t data, size_type length )
: nsTDependentSubstring_CharT(static_cast<const char16_t*>(data), length) {}
nsTDependentSubstring_CharT( char16ptr_t start, char16ptr_t end )
: nsTDependentSubstring_CharT(static_cast<const char16_t*>(start), static_cast<const char16_t*>(end)) {}
#endif
nsTDependentSubstring_CharT( const const_iterator& start, const const_iterator& end )
: substring_type(const_cast<char_type*>(start.get()), uint32_t(end.get() - start.get()), F_NONE) {}
// Create a nsTDependentSubstring to be bound later
nsTDependentSubstring_CharT()
: substring_type() {}
// auto-generated copy-constructor OK (XXX really?? what about base class copy-ctor?)
private:
// NOT USED
void operator=( const self_type& ); // we're immutable, you can't assign into a substring
};
inline
const nsTDependentSubstring_CharT
Substring( const nsTSubstring_CharT& str, uint32_t startPos, uint32_t length = uint32_t(-1) )
{
return nsTDependentSubstring_CharT(str, startPos, length);
}
inline
const nsTDependentSubstring_CharT
Substring( const nsReadingIterator<CharT>& start, const nsReadingIterator<CharT>& end )
{
return nsTDependentSubstring_CharT(start.get(), end.get());
}
inline
const nsTDependentSubstring_CharT
Substring( const CharT* data, uint32_t length )
{
return nsTDependentSubstring_CharT(data, length);
}
inline
const nsTDependentSubstring_CharT
Substring( const CharT* start, const CharT* end )
{
return nsTDependentSubstring_CharT(start, end);
}
inline
const nsTDependentSubstring_CharT
StringHead( const nsTSubstring_CharT& str, uint32_t count )
{
return nsTDependentSubstring_CharT(str, 0, count);
}
inline
const nsTDependentSubstring_CharT
StringTail( const nsTSubstring_CharT& str, uint32_t count )
{
return nsTDependentSubstring_CharT(str, str.Length() - count, count);
}