dom_string.cpp

monqueror一个很具有参考价值的源玛

/**
 * This file is part of the DOM implementation for KDE.
 *
 * (C) 1999 Lars Knoll ([e-mail])
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * $Id: dom_string.cpp,v 1.1.1.1 2002/01/16 10:39:55 ymwei Exp $
 */

#include "dom_string.h"
#include "dom_stringimpl.h"
using namespace DOM;


DOMString::DOMString()
{
    impl = 0;
}

DOMString::DOMString(int)
{
    impl = 0;
}

DOMString::DOMString(const QChar *str, uint len)
{
    impl = new DOMStringImpl( str, len );
    impl->ref();
}

DOMString::DOMString(const QString &str)
{
    if (str.isNull()) {
	impl = 0;
	return;
    }

    impl = new DOMStringImpl( str.unicode(), str.length() );
    impl->ref();
}

DOMString::DOMString(const char *str)
{
    if (!str) {
	impl = 0;
	return;
    }

    impl = new DOMStringImpl( str );
    impl->ref();
}

DOMString::DOMString(DOMStringImpl *i)
{
    impl = i;
    if(impl) impl->ref();
}

DOMString::DOMString(const DOMString &other)
{
    impl = other.impl;
    if(impl) impl->ref();
}

DOMString::~DOMString()
{
    if(impl) impl->deref();
}

DOMString &DOMString::operator =(const DOMString &other)
{
    if(impl) impl->deref();
    impl = other.impl;
    if(impl) impl->ref();
    return *this;
}

DOMString &DOMString::operator += (const DOMString &str)
{
    if(!impl)
    {
	// FIXME!!!
	impl = str.impl;
	impl->ref();
	return *this;
    }
    if(str.impl)
    {
	DOMStringImpl *i = impl->copy();
	impl->deref();
	impl = i;
	impl->ref();
	impl->append(str.impl);
    }
    return *this;
}

DOMString DOMString::operator + (const DOMString &str)
{
    if(!impl) return str.copy();
    if(str.impl)
    {
	DOMString s = copy();
	s += str;
	return s;
    }

    return copy();
}

void DOMString::insert(DOMString str, uint pos)
{
    if(!impl)
    {
	impl = str.impl->copy();
	impl->ref();
    }
    else
	impl->insert(str.impl, pos);
}


const QChar &DOMString::operator [](unsigned int i) const
{
    static const QChar nullChar = 0;

    if(!impl || i >= impl->l ) return nullChar;

    return *(impl->s+i);
}

int DOMString::find(const QChar c, int start) const
{
    unsigned int l = start;
    if(!impl || l >= impl->l ) return -1;
    while( l < impl->l )
    {
	if( *(impl->s+l) == c ) return l;
	l++;
    }
    return -1;
}

uint DOMString::length() const
{
    if(!impl) return 0;
    return impl->l;
}

void DOMString::truncate( unsigned int len )
{
    if(impl) impl->truncate(len);
}

void DOMString::remove(unsigned int pos, int len)
{
  if(impl) impl->remove(pos, len);
}

DOMString DOMString::split(unsigned int pos)
{
  if(!impl) return 0;
  return impl->split(pos);
}


bool DOMString::percentage(int &_percentage) const
{
    if(!impl || !impl->l) return false;

    if ( *(impl->s+impl->l-1) != QChar('%'))
       return false;

    _percentage = QConstString(impl->s, impl->l-1).string().toInt();
    return true;
}

QChar *DOMString::unicode() const
{
    if(!impl) return 0;
    return impl->s;
}

QString DOMString::string() const
{
    if(!impl) return QConstString(0, 0).string();

    return QConstString(impl->s, impl->l).string();
}

int DOMString::toInt() const
{
    if(!impl) return 0;

    return QConstString(impl->s, impl->l).string().toInt();
}

DOMString DOMString::copy() const
{
    if(!impl) return 0;
    return impl->copy();
}

// ------------------------------------------------------------------------

bool DOM::strncmp( const DOMString &a, const DOMString &b, unsigned int len)
{
    if(a.length() < len || b.length() < len) return false;

    if(memcmp(a.unicode(), b.unicode(), len*sizeof(QChar)))
	return true;
    return false;
}

int DOM::strcmp( const DOMString &a, const DOMString &b )
{
    unsigned int l = a.length();
    if( l != b.length() ) return -1;
    return strncmp(a, b, l);
}

int DOM::strncasecmp( const DOMString &s1, const DOMString &s2, unsigned int l )
{
    const QChar *a = s1.unicode();
    const QChar *b = s2.unicode();

    while ( l-- )
    {
	if( a->lower() != b->lower() )
	    return a->lower() - b->lower();
	a++,b++;
    }
    return 0;
}

int DOM::strcasecmp( const DOMString &a, const DOMString &b )
{
    unsigned int l = a.length();
    if( l != b.length() ) return -1;
    return strncasecmp(a, b, l);
}


bool DOMString::isEmpty() const
{
    if (impl == 0) return true;
    return (impl->l == 0);
}

const QChar *DOMString::stringPtr() const
{
    if (impl) return impl->s;
    return 0;
}

//-----------------------------------------------------------------------------

bool DOM::operator==( const DOMString &a, const DOMString &b )
{
    unsigned int l = a.length();

    if( l != b.length() ) return false;

    if(!memcmp(a.unicode(), b.unicode(), l*sizeof(QChar)))
	return true;
    return false;
}

bool DOM::operator==( const DOMString &a, const QString &b )
{
    unsigned int l = a.length();

    if( l != b.length() ) return false;

    if(!memcmp(a.unicode(), b.unicode(), l*sizeof(QChar)))
	return true;
    return false;
}

bool DOM::operator==( const DOMString &a, const char *b )
{
    unsigned int blen = strlen(b);
    if(a.length() != blen) return false;

    const QChar* aptr = a.stringPtr();
    while( blen-- ) {
        if((*aptr++).latin1() != *b++)
            return false;
    }

    return true;
}

bool DOM::operator==( const DOMString &a, int )
{
    return (a.length() == 0);
}

bool DOM::operator!=( const DOMString &a, const DOMString &b )
{
    return !(a==b);
}

bool DOM::operator!=( const DOMString &a, int )
{
    return (a.length() != 0);
}

bool DOM::operator!=( const DOMString &a, const QString &b )
{
    return !(a==b);
}

bool DOM::operator!=( const DOMString &a, const char *b )
{
    return !(a==b);
}