acpi/acpica/exconcat.c

1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
4  * Module Name: exconcat - Concatenate-type AML operators
6  * Copyright (C) 2000 - 2023, Intel Corp.
27  * PARAMETERS:  operand0            - First source object
28  *              operand1            - Second source object
29  *              actual_return_desc  - Where to place the return object
30  *              walk_state          - Current walk state
34  * DESCRIPTION: Concatenate two objects with the ACPI-defined conversion
37  * Per the ACPI spec (up to 6.1), Concatenate only supports Integer,
38  * String, and Buffer objects. However, we support all objects here
40  * and the Printf/Fprintf macros. The extension returns a string
65 	switch (operand0->common.type) {  in acpi_ex_do_concatenate()
70 		operand0_type = operand0->common.type;  in acpi_ex_do_concatenate()
75 		/* For all other types, get the "object type" string */  in acpi_ex_do_concatenate()
90 	switch (operand1->common.type) {  in acpi_ex_do_concatenate()
95 		operand1_type = operand1->common.type;  in acpi_ex_do_concatenate()
100 		/* For all other types, get the "object type" string */  in acpi_ex_do_concatenate()
117 	 * guaranteed to be either Integer/String/Buffer by the operand  in acpi_ex_do_concatenate()
141 			/* Other types have already been converted to string */  in acpi_ex_do_concatenate()
159 			    operand0->common.type));  in acpi_ex_do_concatenate()
177 	 * (Both are Integer, String, or Buffer), and we can now perform  in acpi_ex_do_concatenate()
180 	 * There are three cases to handle, as per the ACPI spec:  in acpi_ex_do_concatenate()
183 	 * 2) Two Strings concatenated to produce a new String  in acpi_ex_do_concatenate()
200 		buffer = (char *)return_desc->buffer.pointer;  in acpi_ex_do_concatenate()
204 		memcpy(buffer, &operand0->integer.value,  in acpi_ex_do_concatenate()
210 		       &local_operand1->integer.value,  in acpi_ex_do_concatenate()
216 		/* Result of two Strings is a String */  in acpi_ex_do_concatenate()
219 							    local_operand0->  in acpi_ex_do_concatenate()
220 							    string.length +  in acpi_ex_do_concatenate()
221 							    local_operand1->  in acpi_ex_do_concatenate()
222 							    string.length));  in acpi_ex_do_concatenate()
228 		buffer = return_desc->string.pointer;  in acpi_ex_do_concatenate()
232 		strcpy(buffer, local_operand0->string.pointer);  in acpi_ex_do_concatenate()
233 		strcat(buffer, local_operand1->string.pointer);  in acpi_ex_do_concatenate()
241 							    operand0->buffer.  in acpi_ex_do_concatenate()
243 							    local_operand1->  in acpi_ex_do_concatenate()
250 		buffer = (char *)return_desc->buffer.pointer;  in acpi_ex_do_concatenate()
254 		memcpy(buffer, operand0->buffer.pointer,  in acpi_ex_do_concatenate()
255 		       operand0->buffer.length);  in acpi_ex_do_concatenate()
256 		memcpy(buffer + operand0->buffer.length,  in acpi_ex_do_concatenate()
257 		       local_operand1->buffer.pointer,  in acpi_ex_do_concatenate()
258 		       local_operand1->buffer.length);  in acpi_ex_do_concatenate()
266 			    operand0->common.type));  in acpi_ex_do_concatenate()
289  * PARAMETERS:  obj_desc            - Object to be converted
290  *              return_desc         - Where to place the return object
294  * DESCRIPTION: Convert an object of arbitrary type to a string object that
307 	type_string = acpi_ut_get_type_name(obj_desc->common.type);  in acpi_ex_convert_to_object_type_string()
314 	strcpy(return_desc->string.pointer, "[");  in acpi_ex_convert_to_object_type_string()
315 	strcat(return_desc->string.pointer, type_string);  in acpi_ex_convert_to_object_type_string()
316 	strcat(return_desc->string.pointer, " Object]");  in acpi_ex_convert_to_object_type_string()
326  * PARAMETERS:  operand0            - First source object
327  *              operand1            - Second source object
328  *              actual_return_desc  - Where to place the return object
329  *              walk_state          - Current walk state
356 	 * Note2: zero-length buffers are allowed; treated like one end_tag  in acpi_ex_concat_template()
366 	length0 = ACPI_PTR_DIFF(end_tag, operand0->buffer.pointer);  in acpi_ex_concat_template()
375 	length1 = ACPI_PTR_DIFF(end_tag, operand1->buffer.pointer);  in acpi_ex_concat_template()
392 	new_buf = return_desc->buffer.pointer;  in acpi_ex_concat_template()
393 	memcpy(new_buf, operand0->buffer.pointer, length0);  in acpi_ex_concat_template()
394 	memcpy(new_buf + length0, operand1->buffer.pointer, length1);  in acpi_ex_concat_template()
398 	new_buf[new_length - 1] = 0;  in acpi_ex_concat_template()
399 	new_buf[new_length - 2] = ACPI_RESOURCE_NAME_END_TAG | 1;  in acpi_ex_concat_template()