gecko/xpcom/string/public/nsTDependentString.h
2012-05-21 12:12:37 +01:00

100 lines
2.9 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/. */
/**
* nsTDependentString_CharT
*
* Stores a null-terminated, immutable sequence of characters.
*
* Subclass of nsTString that restricts string value to an immutable
* character sequence. This class does not own its data, so the creator
* of objects of this type must take care to ensure that a
* nsTDependentString continues to reference valid memory for the
* duration of its use.
*/
class nsTDependentString_CharT : public nsTString_CharT
{
public:
typedef nsTDependentString_CharT self_type;
public:
/**
* verify restrictions
*/
void AssertValid()
{
NS_ASSERTION(mData, "nsTDependentString must wrap a non-NULL buffer");
NS_ASSERTION(mLength != size_type(-1), "nsTDependentString has bogus length");
NS_ASSERTION(mData[mLength] == 0, "nsTDependentString must wrap only null-terminated strings");
}
/**
* constructors
*/
nsTDependentString_CharT( const char_type* start, const char_type* end )
: string_type(const_cast<char_type*>(start), PRUint32(end - start), F_TERMINATED)
{
AssertValid();
}
nsTDependentString_CharT( const char_type* data, PRUint32 length )
: string_type(const_cast<char_type*>(data), length, F_TERMINATED)
{
AssertValid();
}
explicit
nsTDependentString_CharT( const char_type* data )
: string_type(const_cast<char_type*>(data), PRUint32(char_traits::length(data)), F_TERMINATED)
{
AssertValid();
}
nsTDependentString_CharT( const string_type& str, PRUint32 startPos )
: string_type()
{
Rebind(str, startPos);
}
// Create a nsTDependentSubstring to be bound later
nsTDependentString_CharT()
: string_type() {}
// XXX are you sure??
// auto-generated copy-constructor OK
// auto-generated copy-assignment operator OK
// auto-generated destructor OK
/**
* allow this class to be bound to a different string...
*/
void Rebind( const char_type* data )
{
Rebind(data, PRUint32(char_traits::length(data)));
}
void Rebind( const char_type* data, size_type length );
void Rebind( const char_type* start, const char_type* end )
{
Rebind(start, PRUint32(end - start));
}
void Rebind( const string_type&, PRUint32 startPos );
private:
// NOT USED
nsTDependentString_CharT( const substring_tuple_type& );
};