6b8c94a6e3
UBSan reports an avalanche of unaligned pointer bugs stemming from hardcoded 4-byte alignments used in certain places. Use sizeof(long) instead to align to the machine word size. Change-Id: I28e505212462c5268afa24e95df3a103ac3e2213
109 lines
3.4 KiB
C
109 lines
3.4 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id: skin_buffer.c 25962 2010-05-12 09:31:40Z jdgordon $
|
|
*
|
|
* Copyright (C) 2002 by Linus Nielsen Feltzing
|
|
* Copyright (C) 2010 Jonathan Gordon
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "skin_buffer.h"
|
|
#include "skin_parser.h"
|
|
|
|
/****************************************************************************
|
|
*
|
|
* This code handles buffer allocation for the entire skin system.
|
|
* This needs to work in 3 different situations:
|
|
* 1) as a stand alone library. ROCKBOX isnt defined, alloc using malloc()
|
|
* and free the skin elements only (no callbacks doing more allocation)
|
|
* 2) ROCKBOX builds for normal targets, alloc from a single big buffer
|
|
* which origionally came from the audio buffer, likely to run out of
|
|
* room with large themes. No need to free anything, just restore to
|
|
* the start of our buffer
|
|
* 3) ROCKBOX "application/hosted" builds, alloc using the hosts malloc().
|
|
* We need to keep track of all allocations so they can be free()'d easily
|
|
*
|
|
*
|
|
****************************************************************************/
|
|
|
|
|
|
#ifdef ROCKBOX
|
|
#include "config.h"
|
|
#include "skin_debug.h"
|
|
static size_t buf_size;
|
|
static unsigned char *buffer_start = NULL;
|
|
static unsigned char *buffer_front = NULL;
|
|
|
|
#ifndef __PCTOOL__
|
|
long skin_buffer_to_offset(void *pointer)
|
|
{
|
|
return pointer == NULL ? -1 : (void*)pointer - (void*)buffer_start;
|
|
}
|
|
|
|
void* skin_buffer_from_offset(long offset)
|
|
{
|
|
return offset < 0 ? NULL : buffer_start + offset;
|
|
}
|
|
#endif
|
|
|
|
void skin_buffer_init(char* buffer, size_t size)
|
|
{
|
|
buffer_start = buffer_front = buffer;
|
|
buf_size = size;
|
|
}
|
|
|
|
/* Allocate size bytes from the buffer */
|
|
#ifdef DEBUG_SKIN_ALLOCATIONS
|
|
void* skin_buffer_alloc_ex(size_t size, char* debug)
|
|
{
|
|
void *retval = NULL;
|
|
printf("%d %s\n", size, debug);
|
|
#else
|
|
void* skin_buffer_alloc(size_t size)
|
|
{
|
|
void *retval = NULL;
|
|
#endif
|
|
/* align to long which is enough for most types */
|
|
size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
|
|
if (size > skin_buffer_freespace())
|
|
{
|
|
skin_error(MEMORY_LIMIT_EXCEEDED, NULL);
|
|
return NULL;
|
|
}
|
|
retval = buffer_front;
|
|
buffer_front += size;
|
|
return retval;
|
|
}
|
|
|
|
/* get the number of bytes currently being used */
|
|
size_t skin_buffer_usage(void)
|
|
{
|
|
return buffer_front - buffer_start;
|
|
}
|
|
size_t skin_buffer_freespace(void)
|
|
{
|
|
return buf_size - skin_buffer_usage();
|
|
}
|
|
#else
|
|
void* skin_buffer_alloc(size_t size)
|
|
{
|
|
return malloc(size);
|
|
}
|
|
#endif
|