/*
 * The contents of this file are subject to the Netscape 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/NPL/

 * 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 Rhino code, released
 * May 6, 1999.

 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1997-1999 Netscape Communications Corporation. All
 * Rights Reserved.

 * Contributor(s): 

 * Alternatively, the contents of this file may be used under the
 * terms of the GNU Public License (the "GPL"), in which case the
 * provisions of the GPL are applicable instead of those above.
 * If you wish to allow use of your version of this file only
 * under the terms of the GPL and not to allow others to use your
 * version of this file under the NPL, indicate your decision by
 * deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL.  If you do not delete
 * the provisions above, a recipient may use your version of this
 * file under either the NPL or the GPL.
 */
#ifdef PERSIST

/* Header file */
#if defined(VX)
# include <vxWorks.h>
#elif defined(SUNOS5)
# include <macros.h>
#elif defined(LINUX)
# define min(a, b)       ((a) < (b) ? (a) : (b))
# define max(a, b)       ((a) > (b) ? (a) : (b))
#endif
#if !defined(max)
#define max(a, b)       ((a) < (b) ? (b) : (a))
#endif
#if !defined(min)
#define min(a, b)       ((a) > (b) ? (b) : (a))
#endif
#if linux
# include <stdint.h>
#endif
#include <sys/types.h>
#include <string.h>
#include "js-binaryrandomreader.h"

/* Procedures */
int
JSBinaryRandomReader::read(void* buf, int off, int len) 
{
    if (next >= size) {
         return -1;
    }
    int n = ( int ) min( size - next , ( size_t ) len);

    memcpy( ( uint8_t* ) buf + off, ( uint8_t* ) data + next, n );
    next += n;
    return n;
}
off_t
JSBinaryRandomReader::seek( off_t pos )
{
    if ( pos >= 0 && pos <= ( off_t ) size ) {
	next = pos;
    }
    return -1;
}

JSBinaryRandomReader::JSBinaryRandomReader( void* data, size_t size )
{
    this->data = data;
    this->size = size;
    next = 0;
}

#endif /* PERSIST */

