/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * 
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the mozilla.org LDAP XPCOM SDK.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Dan Mosedale <dmose@netscape.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsLDAPBERValue.h"
#include "nsMemory.h"
#include "nsString.h"
#include "nsReadableUtils.h"

NS_IMPL_THREADSAFE_ISUPPORTS1(nsLDAPBERValue, nsILDAPBERValue)

nsLDAPBERValue::nsLDAPBERValue() : mValue(0), mSize(0)
{
}

nsLDAPBERValue::~nsLDAPBERValue()
{
    if (mValue) {
        nsMemory::Free(mValue);
    }
}

// void get (out unsigned long aCount, 
//           [array, size_is (aCount), retval] out octet aRetVal); */
NS_IMETHODIMP 
nsLDAPBERValue::Get(PRUint32 *aCount, PRUint8 **aRetVal)
{
    // if mSize = 0, return a count of a 0 and a null pointer

    if (mSize) {
        // get a buffer to hold a copy of the data
        //
        PRUint8 *array = NS_STATIC_CAST(PRUint8 *, nsMemory::Alloc(mSize));

        if (!array) {
            return NS_ERROR_OUT_OF_MEMORY;
        }
    
        // copy and return
        //
        memcpy(array, mValue, mSize);
        *aRetVal = array;
    } else {
        *aRetVal = 0;
    }

    *aCount = mSize;
    return NS_OK;
}

// void set(in unsigned long aCount, 
//          [array, size_is(aCount)] in octet aValue);
NS_IMETHODIMP
nsLDAPBERValue::Set(PRUint32 aCount, PRUint8 *aValue)
{
    // get rid of any old value being held here
    //
    if (mValue) {
        nsMemory::Free(mValue);
    }

    // if this is a non-zero value, allocate a buffer and copy
    //
    if (aCount) { 
        // get a buffer to hold a copy of this data
        //
        mValue = NS_STATIC_CAST(PRUint8 *, nsMemory::Alloc(aCount));
        if (!mValue) {
            return NS_ERROR_OUT_OF_MEMORY;
        }

        // copy the data and return
        //
        memcpy(mValue, aValue, aCount);
    } else {
        // otherwise just set it to null
        //
        mValue = 0;
    }

    mSize = aCount;
    return NS_OK;
}

// void setFromUTF8(in AUTF8String aValue);
//
NS_IMETHODIMP
nsLDAPBERValue::SetFromUTF8(const nsACString & aValue)
{
    // get rid of any old value being held here
    //
    if (mValue) {
        nsMemory::Free(mValue);
    }

    // copy the data and return
    //
    // XXXdmose should really be ToNewUTF8String, once the appropriate 
    // signature for that exists
    //
    mSize = aValue.Length();
    if (mSize) {
        mValue = NS_REINTERPRET_CAST(PRUint8 *, ToNewCString(aValue)); 
    } else {
        mValue = 0;
    }
    return NS_OK;
}