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/******************************************************************************
*
* Module Name: exstorob - AML Interpreter object store support, store to object
* $Revision: 37 $
*
*****************************************************************************/
/*
* Copyright (C) 2000, 2001 R. Byron Moore
*
* 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 program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "acpi.h"
#include "acparser.h"
#include "acdispat.h"
#include "acinterp.h"
#include "amlcode.h"
#include "acnamesp.h"
#include "actables.h"
#define _COMPONENT ACPI_EXECUTER
MODULE_NAME ("exstorob")
/*******************************************************************************
*
* FUNCTION: Acpi_ex_copy_buffer_to_buffer
*
* PARAMETERS: Source_desc - Source object to copy
* Target_desc - Destination object of the copy
*
* RETURN: Status
*
* DESCRIPTION: Copy a buffer object to another buffer object.
*
******************************************************************************/
acpi_status
acpi_ex_copy_buffer_to_buffer (
acpi_operand_object *source_desc,
acpi_operand_object *target_desc)
{
u32 length;
u8 *buffer;
PROC_NAME ("Ex_copy_buffer_to_buffer");
/*
* We know that Source_desc is a buffer by now
*/
buffer = (u8 *) source_desc->buffer.pointer;
length = source_desc->buffer.length;
/*
* If target is a buffer of length zero, allocate a new
* buffer of the proper length
*/
if (target_desc->buffer.length == 0) {
target_desc->buffer.pointer = ACPI_MEM_ALLOCATE (length);
if (!target_desc->buffer.pointer) {
return (AE_NO_MEMORY);
}
target_desc->buffer.length = length;
}
/*
* Buffer is a static allocation,
* only place what will fit in the buffer.
*/
if (length <= target_desc->buffer.length) {
/* Clear existing buffer and copy in the new one */
MEMSET (target_desc->buffer.pointer, 0, target_desc->buffer.length);
MEMCPY (target_desc->buffer.pointer, buffer, length);
}
else {
/*
* Truncate the source, copy only what will fit
*/
MEMCPY (target_desc->buffer.pointer, buffer, target_desc->buffer.length);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Truncating src buffer from %X to %X\n",
length, target_desc->buffer.length));
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ex_copy_string_to_string
*
* PARAMETERS: Source_desc - Source object to copy
* Target_desc - Destination object of the copy
*
* RETURN: Status
*
* DESCRIPTION: Copy a String object to another String object
*
******************************************************************************/
acpi_status
acpi_ex_copy_string_to_string (
acpi_operand_object *source_desc,
acpi_operand_object *target_desc)
{
u32 length;
u8 *buffer;
FUNCTION_ENTRY ();
/*
* We know that Source_desc is a string by now.
*/
buffer = (u8 *) source_desc->string.pointer;
length = source_desc->string.length;
/*
* Setting a string value replaces the old string
*/
if (length < target_desc->string.length) {
/* Clear old string and copy in the new one */
MEMSET (target_desc->string.pointer, 0, target_desc->string.length);
MEMCPY (target_desc->string.pointer, buffer, length);
}
else {
/*
* Free the current buffer, then allocate a buffer
* large enough to hold the value
*/
if (target_desc->string.pointer &&
(!(target_desc->common.flags & AOPOBJ_STATIC_POINTER))) {
/*
* Only free if not a pointer into the DSDT
*/
ACPI_MEM_FREE (target_desc->string.pointer);
}
target_desc->string.pointer = ACPI_MEM_ALLOCATE (length + 1);
if (!target_desc->string.pointer) {
return (AE_NO_MEMORY);
}
target_desc->string.length = length;
MEMCPY (target_desc->string.pointer, buffer, length);
}
return (AE_OK);
}
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