utmisc.c

linux-2.6.15.6

	}

	return (TRUE);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_valid_acpi_character
 *
 * PARAMETERS:  Character           - The character to be examined
 *
 * RETURN:      1 if Character may appear in a name, else 0
 *
 * DESCRIPTION: Check for a printable character
 *
 ******************************************************************************/

u8 acpi_ut_valid_acpi_character(char character)
{

	ACPI_FUNCTION_ENTRY();

	return ((u8) ((character == '_') ||
		      (character >= 'A' && character <= 'Z') ||
		      (character >= '0' && character <= '9')));
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_strtoul64
 *
 * PARAMETERS:  String          - Null terminated string
 *              Base            - Radix of the string: 10, 16, or ACPI_ANY_BASE
 *              ret_integer     - Where the converted integer is returned
 *
 * RETURN:      Status and Converted value
 *
 * DESCRIPTION: Convert a string into an unsigned value.
 *              NOTE: Does not support Octal strings, not needed.
 *
 ******************************************************************************/

acpi_status
acpi_ut_strtoul64(char *string, u32 base, acpi_integer * ret_integer)
{
	u32 this_digit = 0;
	acpi_integer return_value = 0;
	acpi_integer quotient;

	ACPI_FUNCTION_TRACE("ut_stroul64");

	if ((!string) || !(*string)) {
		goto error_exit;
	}

	switch (base) {
	case ACPI_ANY_BASE:
	case 10:
	case 16:
		break;

	default:
		/* Invalid Base */
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	/* Skip over any white space in the buffer */

	while (ACPI_IS_SPACE(*string) || *string == '\t') {
		string++;
	}

	/*
	 * If the input parameter Base is zero, then we need to
	 * determine if it is decimal or hexadecimal:
	 */
	if (base == 0) {
		if ((*string == '0') && (ACPI_TOLOWER(*(string + 1)) == 'x')) {
			base = 16;
			string += 2;
		} else {
			base = 10;
		}
	}

	/*
	 * For hexadecimal base, skip over the leading
	 * 0 or 0x, if they are present.
	 */
	if ((base == 16) &&
	    (*string == '0') && (ACPI_TOLOWER(*(string + 1)) == 'x')) {
		string += 2;
	}

	/* Any string left? */

	if (!(*string)) {
		goto error_exit;
	}

	/* Main loop: convert the string to a 64-bit integer */

	while (*string) {
		if (ACPI_IS_DIGIT(*string)) {
			/* Convert ASCII 0-9 to Decimal value */

			this_digit = ((u8) * string) - '0';
		} else {
			if (base == 10) {
				/* Digit is out of range */

				goto error_exit;
			}

			this_digit = (u8) ACPI_TOUPPER(*string);
			if (ACPI_IS_XDIGIT((char)this_digit)) {
				/* Convert ASCII Hex char to value */

				this_digit = this_digit - 'A' + 10;
			} else {
				/*
				 * We allow non-hex chars, just stop now, same as end-of-string.
				 * See ACPI spec, string-to-integer conversion.
				 */
				break;
			}
		}

		/* Divide the digit into the correct position */

		(void)
		    acpi_ut_short_divide((ACPI_INTEGER_MAX -
					  (acpi_integer) this_digit), base,
					 &quotient, NULL);
		if (return_value > quotient) {
			goto error_exit;
		}

		return_value *= base;
		return_value += this_digit;
		string++;
	}

	/* All done, normal exit */

	*ret_integer = return_value;
	return_ACPI_STATUS(AE_OK);

      error_exit:
	/* Base was set/validated above */

	if (base == 10) {
		return_ACPI_STATUS(AE_BAD_DECIMAL_CONSTANT);
	} else {
		return_ACPI_STATUS(AE_BAD_HEX_CONSTANT);
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_create_update_state_and_push
 *
 * PARAMETERS:  Object          - Object to be added to the new state
 *              Action          - Increment/Decrement
 *              state_list      - List the state will be added to
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a new state and push it
 *
 ******************************************************************************/

acpi_status
acpi_ut_create_update_state_and_push(union acpi_operand_object *object,
				     u16 action,
				     union acpi_generic_state **state_list)
{
	union acpi_generic_state *state;

	ACPI_FUNCTION_ENTRY();

	/* Ignore null objects; these are expected */

	if (!object) {
		return (AE_OK);
	}

	state = acpi_ut_create_update_state(object, action);
	if (!state) {
		return (AE_NO_MEMORY);
	}

	acpi_ut_push_generic_state(state_list, state);
	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_walk_package_tree
 *
 * PARAMETERS:  source_object       - The package to walk
 *              target_object       - Target object (if package is being copied)
 *              walk_callback       - Called once for each package element
 *              Context             - Passed to the callback function
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Walk through a package
 *
 ******************************************************************************/

acpi_status
acpi_ut_walk_package_tree(union acpi_operand_object * source_object,
			  void *target_object,
			  acpi_pkg_callback walk_callback, void *context)
{
	acpi_status status = AE_OK;
	union acpi_generic_state *state_list = NULL;
	union acpi_generic_state *state;
	u32 this_index;
	union acpi_operand_object *this_source_obj;

	ACPI_FUNCTION_TRACE("ut_walk_package_tree");

	state = acpi_ut_create_pkg_state(source_object, target_object, 0);
	if (!state) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	while (state) {
		/* Get one element of the package */

		this_index = state->pkg.index;
		this_source_obj = (union acpi_operand_object *)
		    state->pkg.source_object->package.elements[this_index];

		/*
		 * Check for:
		 * 1) An uninitialized package element.  It is completely
		 *    legal to declare a package and leave it uninitialized
		 * 2) Not an internal object - can be a namespace node instead
		 * 3) Any type other than a package.  Packages are handled in else
		 *    case below.
		 */
		if ((!this_source_obj) ||
		    (ACPI_GET_DESCRIPTOR_TYPE(this_source_obj) !=
		     ACPI_DESC_TYPE_OPERAND)
		    || (ACPI_GET_OBJECT_TYPE(this_source_obj) !=
			ACPI_TYPE_PACKAGE)) {
			status =
			    walk_callback(ACPI_COPY_TYPE_SIMPLE,
					  this_source_obj, state, context);
			if (ACPI_FAILURE(status)) {
				return_ACPI_STATUS(status);
			}

			state->pkg.index++;
			while (state->pkg.index >=
			       state->pkg.source_object->package.count) {
				/*
				 * We've handled all of the objects at this level,  This means
				 * that we have just completed a package.  That package may
				 * have contained one or more packages itself.
				 *
				 * Delete this state and pop the previous state (package).
				 */
				acpi_ut_delete_generic_state(state);
				state = acpi_ut_pop_generic_state(&state_list);

				/* Finished when there are no more states */

				if (!state) {
					/*
					 * We have handled all of the objects in the top level
					 * package just add the length of the package objects
					 * and exit
					 */
					return_ACPI_STATUS(AE_OK);
				}

				/*
				 * Go back up a level and move the index past the just
				 * completed package object.
				 */
				state->pkg.index++;
			}
		} else {
			/* This is a subobject of type package */

			status =
			    walk_callback(ACPI_COPY_TYPE_PACKAGE,
					  this_source_obj, state, context);
			if (ACPI_FAILURE(status)) {
				return_ACPI_STATUS(status);
			}

			/*
			 * Push the current state and create a new one
			 * The callback above returned a new target package object.
			 */
			acpi_ut_push_generic_state(&state_list, state);
			state = acpi_ut_create_pkg_state(this_source_obj,
							 state->pkg.
							 this_target_obj, 0);
			if (!state) {
				return_ACPI_STATUS(AE_NO_MEMORY);
			}
		}
	}

	/* We should never get here */

	return_ACPI_STATUS(AE_AML_INTERNAL);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_generate_checksum
 *
 * PARAMETERS:  Buffer          - Buffer to be scanned
 *              Length          - number of bytes to examine
 *
 * RETURN:      The generated checksum
 *
 * DESCRIPTION: Generate a checksum on a raw buffer
 *
 ******************************************************************************/

u8 acpi_ut_generate_checksum(u8 * buffer, u32 length)
{
	u32 i;
	signed char sum = 0;

	for (i = 0; i < length; i++) {
		sum = (signed char)(sum + buffer[i]);
	}

	return ((u8) (0 - sum));
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_resource_end_tag
 *
 * PARAMETERS:  obj_desc        - The resource template buffer object
 *
 * RETURN:      Pointer to the end tag
 *
 * DESCRIPTION: Find the END_TAG resource descriptor in a resource template
 *
 ******************************************************************************/

u8 *acpi_ut_get_resource_end_tag(union acpi_operand_object * obj_desc)
{
	u8 buffer_byte;
	u8 *buffer;
	u8 *end_buffer;

	buffer = obj_desc->buffer.pointer;
	end_buffer = buffer + obj_desc->buffer.length;

	while (buffer < end_buffer) {
		buffer_byte = *buffer;
		if (buffer_byte & ACPI_RDESC_TYPE_MASK) {
			/* Large Descriptor - Length is next 2 bytes */

			buffer += ((*(buffer + 1) | (*(buffer + 2) << 8)) + 3);
		} else {
			/* Small Descriptor.  End Tag will be found here */

			if ((buffer_byte & ACPI_RDESC_SMALL_MASK) ==
			    ACPI_RDESC_TYPE_END_TAG) {
				/* Found the end tag descriptor, all done. */

				return (buffer);
			}

			/* Length is in the header */

			buffer += ((buffer_byte & 0x07) + 1);
		}
	}

	/* End tag not found */

	return (NULL);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_report_error
 *
 * PARAMETERS:  module_name         - Caller's module name (for error output)
 *              line_number         - Caller's line number (for error output)
 *              component_id        - Caller's component ID (for error output)
 *
 * RETURN:      None
 *
 * DESCRIPTION: Print error message
 *
 ******************************************************************************/

void acpi_ut_report_error(char *module_name, u32 line_number, u32 component_id)
{

	acpi_os_printf("%8s-%04d: *** Error: ", module_name, line_number);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_report_warning
 *
 * PARAMETERS:  module_name         - Caller's module name (for error output)
 *              line_number         - Caller's line number (for error output)
 *              component_id        - Caller's component ID (for error output)
 *
 * RETURN:      None
 *
 * DESCRIPTION: Print warning message
 *
 ******************************************************************************/

void
acpi_ut_report_warning(char *module_name, u32 line_number, u32 component_id)
{

	acpi_os_printf("%8s-%04d: *** Warning: ", module_name, line_number);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_report_info
 *
 * PARAMETERS:  module_name         - Caller's module name (for error output)
 *              line_number         - Caller's line number (for error output)
 *              component_id        - Caller's component ID (for error output)
 *
 * RETURN:      None
 *
 * DESCRIPTION: Print information message
 *
 ******************************************************************************/

void acpi_ut_report_info(char *module_name, u32 line_number, u32 component_id)
{

	acpi_os_printf("%8s-%04d: *** Info: ", module_name, line_number);
}