patch-2.4.6 linux/drivers/acpi/executer/exstorob.c

• Lines: 170
• Date: Wed Jun 20 17:47:40 2001
• Orig file: v2.4.5/linux/drivers/acpi/executer/exstorob.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/drivers/acpi/executer/exstorob.c linux/drivers/acpi/executer/exstorob.c
@@ -0,0 +1,169 @@
+
+/******************************************************************************
+ *
+ * Module Name: exstorob - AML Interpreter object store support, store to object
+ *              $Revision: 32 $
+ *
+ *****************************************************************************/
+
+/*
+ *  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;
+
+
+	/*
+	 * 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_ut_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);
+
+	}
+
+	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;
+
+
+	/*
+	 * 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 &&
+			!acpi_tb_system_table_pointer (target_desc->string.pointer)) {
+			/*
+			 * Only free if not a pointer into the DSDT
+			 */
+			acpi_ut_free(target_desc->string.pointer);
+		}
+
+		target_desc->string.pointer = acpi_ut_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);
+}
+
+