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1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/*******************************************************************************
3 *
4 * Module Name: utstring - Common functions for strings and characters
5 *
6 ******************************************************************************/
7
8#include <acpi/acpi.h>
9#include "accommon.h"
10#include "acnamesp.h"
11
12#define _COMPONENT ACPI_UTILITIES
13ACPI_MODULE_NAME("utstring")
14
15/*******************************************************************************
16 *
17 * FUNCTION: acpi_ut_print_string
18 *
19 * PARAMETERS: string - Null terminated ASCII string
20 * max_length - Maximum output length. Used to constrain the
21 * length of strings during debug output only.
22 *
23 * RETURN: None
24 *
25 * DESCRIPTION: Dump an ASCII string with support for ACPI-defined escape
26 * sequences.
27 *
28 ******************************************************************************/
29void acpi_ut_print_string(char *string, u16 max_length)
30{
31 u32 i;
32
33 if (!string) {
34 acpi_os_printf("<\"NULL STRING PTR\">");
35 return;
36 }
37
38 acpi_os_printf("\"");
39 for (i = 0; (i < max_length) && string[i]; i++) {
40
41 /* Escape sequences */
42
43 switch (string[i]) {
44 case 0x07:
45
46 acpi_os_printf("\\a"); /* BELL */
47 break;
48
49 case 0x08:
50
51 acpi_os_printf("\\b"); /* BACKSPACE */
52 break;
53
54 case 0x0C:
55
56 acpi_os_printf("\\f"); /* FORMFEED */
57 break;
58
59 case 0x0A:
60
61 acpi_os_printf("\\n"); /* LINEFEED */
62 break;
63
64 case 0x0D:
65
66 acpi_os_printf("\\r"); /* CARRIAGE RETURN */
67 break;
68
69 case 0x09:
70
71 acpi_os_printf("\\t"); /* HORIZONTAL TAB */
72 break;
73
74 case 0x0B:
75
76 acpi_os_printf("\\v"); /* VERTICAL TAB */
77 break;
78
79 case '\'': /* Single Quote */
80 case '\"': /* Double Quote */
81 case '\\': /* Backslash */
82
83 acpi_os_printf("\\%c", (int)string[i]);
84 break;
85
86 default:
87
88 /* Check for printable character or hex escape */
89
90 if (isprint((int)string[i])) {
91 /* This is a normal character */
92
93 acpi_os_printf("%c", (int)string[i]);
94 } else {
95 /* All others will be Hex escapes */
96
97 acpi_os_printf("\\x%2.2X", (s32)string[i]);
98 }
99 break;
100 }
101 }
102
103 acpi_os_printf("\"");
104
105 if (i == max_length && string[i]) {
106 acpi_os_printf("...");
107 }
108}
109
110/*******************************************************************************
111 *
112 * FUNCTION: acpi_ut_repair_name
113 *
114 * PARAMETERS: name - The ACPI name to be repaired
115 *
116 * RETURN: Repaired version of the name
117 *
118 * DESCRIPTION: Repair an ACPI name: Change invalid characters to '*' and
119 * return the new name. NOTE: the Name parameter must reside in
120 * read/write memory, cannot be a const.
121 *
122 * An ACPI Name must consist of valid ACPI characters. We will repair the name
123 * if necessary because we don't want to abort because of this, but we want
124 * all namespace names to be printable. A warning message is appropriate.
125 *
126 * This issue came up because there are in fact machines that exhibit
127 * this problem, and we want to be able to enable ACPI support for them,
128 * even though there are a few bad names.
129 *
130 ******************************************************************************/
131
132void acpi_ut_repair_name(char *name)
133{
134 u32 i;
135 u8 found_bad_char = FALSE;
136 u32 original_name;
137
138 ACPI_FUNCTION_NAME(ut_repair_name);
139
140 /*
141 * Special case for the root node. This can happen if we get an
142 * error during the execution of module-level code.
143 */
144 if (ACPI_COMPARE_NAMESEG(name, ACPI_ROOT_PATHNAME)) {
145 return;
146 }
147
148 ACPI_COPY_NAMESEG(&original_name, &name[0]);
149
150 /* Check each character in the name */
151
152 for (i = 0; i < ACPI_NAMESEG_SIZE; i++) {
153 if (acpi_ut_valid_name_char(name[i], i)) {
154 continue;
155 }
156
157 /*
158 * Replace a bad character with something printable, yet technically
159 * "odd". This prevents any collisions with existing "good"
160 * names in the namespace.
161 */
162 name[i] = '_';
163 found_bad_char = TRUE;
164 }
165
166 if (found_bad_char) {
167
168 /* Report warning only if in strict mode or debug mode */
169
170 if (!acpi_gbl_enable_interpreter_slack) {
171 ACPI_WARNING((AE_INFO,
172 "Invalid character(s) in name (0x%.8X) %p, repaired: [%4.4s]",
173 original_name, name, &name[0]));
174 } else {
175 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
176 "Invalid character(s) in name (0x%.8X), repaired: [%4.4s]",
177 original_name, name));
178 }
179 }
180}
181
182#if defined ACPI_ASL_COMPILER || defined ACPI_EXEC_APP
183/*******************************************************************************
184 *
185 * FUNCTION: ut_convert_backslashes
186 *
187 * PARAMETERS: pathname - File pathname string to be converted
188 *
189 * RETURN: Modifies the input Pathname
190 *
191 * DESCRIPTION: Convert all backslashes (0x5C) to forward slashes (0x2F) within
192 * the entire input file pathname string.
193 *
194 ******************************************************************************/
195
196void ut_convert_backslashes(char *pathname)
197{
198
199 if (!pathname) {
200 return;
201 }
202
203 while (*pathname) {
204 if (*pathname == '\\') {
205 *pathname = '/';
206 }
207
208 pathname++;
209 }
210}
211#endif
1/*******************************************************************************
2 *
3 * Module Name: utstring - Common functions for strings and characters
4 *
5 ******************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2014, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acnamesp.h"
47
48#define _COMPONENT ACPI_UTILITIES
49ACPI_MODULE_NAME("utstring")
50
51/*
52 * Non-ANSI C library functions - strlwr, strupr, stricmp, and a 64-bit
53 * version of strtoul.
54 */
55#ifdef ACPI_ASL_COMPILER
56/*******************************************************************************
57 *
58 * FUNCTION: acpi_ut_strlwr (strlwr)
59 *
60 * PARAMETERS: src_string - The source string to convert
61 *
62 * RETURN: None
63 *
64 * DESCRIPTION: Convert string to lowercase
65 *
66 * NOTE: This is not a POSIX function, so it appears here, not in utclib.c
67 *
68 ******************************************************************************/
69void acpi_ut_strlwr(char *src_string)
70{
71 char *string;
72
73 ACPI_FUNCTION_ENTRY();
74
75 if (!src_string) {
76 return;
77 }
78
79 /* Walk entire string, lowercasing the letters */
80
81 for (string = src_string; *string; string++) {
82 *string = (char)ACPI_TOLOWER(*string);
83 }
84
85 return;
86}
87
88/******************************************************************************
89 *
90 * FUNCTION: acpi_ut_stricmp (stricmp)
91 *
92 * PARAMETERS: string1 - first string to compare
93 * string2 - second string to compare
94 *
95 * RETURN: int that signifies string relationship. Zero means strings
96 * are equal.
97 *
98 * DESCRIPTION: Implementation of the non-ANSI stricmp function (compare
99 * strings with no case sensitivity)
100 *
101 ******************************************************************************/
102
103int acpi_ut_stricmp(char *string1, char *string2)
104{
105 int c1;
106 int c2;
107
108 do {
109 c1 = tolower((int)*string1);
110 c2 = tolower((int)*string2);
111
112 string1++;
113 string2++;
114 }
115 while ((c1 == c2) && (c1));
116
117 return (c1 - c2);
118}
119#endif
120
121/*******************************************************************************
122 *
123 * FUNCTION: acpi_ut_strupr (strupr)
124 *
125 * PARAMETERS: src_string - The source string to convert
126 *
127 * RETURN: None
128 *
129 * DESCRIPTION: Convert string to uppercase
130 *
131 * NOTE: This is not a POSIX function, so it appears here, not in utclib.c
132 *
133 ******************************************************************************/
134
135void acpi_ut_strupr(char *src_string)
136{
137 char *string;
138
139 ACPI_FUNCTION_ENTRY();
140
141 if (!src_string) {
142 return;
143 }
144
145 /* Walk entire string, uppercasing the letters */
146
147 for (string = src_string; *string; string++) {
148 *string = (char)ACPI_TOUPPER(*string);
149 }
150
151 return;
152}
153
154/*******************************************************************************
155 *
156 * FUNCTION: acpi_ut_strtoul64
157 *
158 * PARAMETERS: string - Null terminated string
159 * base - Radix of the string: 16 or ACPI_ANY_BASE;
160 * ACPI_ANY_BASE means 'in behalf of to_integer'
161 * ret_integer - Where the converted integer is returned
162 *
163 * RETURN: Status and Converted value
164 *
165 * DESCRIPTION: Convert a string into an unsigned value. Performs either a
166 * 32-bit or 64-bit conversion, depending on the current mode
167 * of the interpreter.
168 * NOTE: Does not support Octal strings, not needed.
169 *
170 ******************************************************************************/
171
172acpi_status acpi_ut_strtoul64(char *string, u32 base, u64 *ret_integer)
173{
174 u32 this_digit = 0;
175 u64 return_value = 0;
176 u64 quotient;
177 u64 dividend;
178 u32 to_integer_op = (base == ACPI_ANY_BASE);
179 u32 mode32 = (acpi_gbl_integer_byte_width == 4);
180 u8 valid_digits = 0;
181 u8 sign_of0x = 0;
182 u8 term = 0;
183
184 ACPI_FUNCTION_TRACE_STR(ut_stroul64, string);
185
186 switch (base) {
187 case ACPI_ANY_BASE:
188 case 16:
189
190 break;
191
192 default:
193
194 /* Invalid Base */
195
196 return_ACPI_STATUS(AE_BAD_PARAMETER);
197 }
198
199 if (!string) {
200 goto error_exit;
201 }
202
203 /* Skip over any white space in the buffer */
204
205 while ((*string) && (ACPI_IS_SPACE(*string) || *string == '\t')) {
206 string++;
207 }
208
209 if (to_integer_op) {
210 /*
211 * Base equal to ACPI_ANY_BASE means 'ToInteger operation case'.
212 * We need to determine if it is decimal or hexadecimal.
213 */
214 if ((*string == '0') && (ACPI_TOLOWER(*(string + 1)) == 'x')) {
215 sign_of0x = 1;
216 base = 16;
217
218 /* Skip over the leading '0x' */
219 string += 2;
220 } else {
221 base = 10;
222 }
223 }
224
225 /* Any string left? Check that '0x' is not followed by white space. */
226
227 if (!(*string) || ACPI_IS_SPACE(*string) || *string == '\t') {
228 if (to_integer_op) {
229 goto error_exit;
230 } else {
231 goto all_done;
232 }
233 }
234
235 /*
236 * Perform a 32-bit or 64-bit conversion, depending upon the current
237 * execution mode of the interpreter
238 */
239 dividend = (mode32) ? ACPI_UINT32_MAX : ACPI_UINT64_MAX;
240
241 /* Main loop: convert the string to a 32- or 64-bit integer */
242
243 while (*string) {
244 if (ACPI_IS_DIGIT(*string)) {
245
246 /* Convert ASCII 0-9 to Decimal value */
247
248 this_digit = ((u8)*string) - '0';
249 } else if (base == 10) {
250
251 /* Digit is out of range; possible in to_integer case only */
252
253 term = 1;
254 } else {
255 this_digit = (u8)ACPI_TOUPPER(*string);
256 if (ACPI_IS_XDIGIT((char)this_digit)) {
257
258 /* Convert ASCII Hex char to value */
259
260 this_digit = this_digit - 'A' + 10;
261 } else {
262 term = 1;
263 }
264 }
265
266 if (term) {
267 if (to_integer_op) {
268 goto error_exit;
269 } else {
270 break;
271 }
272 } else if ((valid_digits == 0) && (this_digit == 0)
273 && !sign_of0x) {
274
275 /* Skip zeros */
276 string++;
277 continue;
278 }
279
280 valid_digits++;
281
282 if (sign_of0x
283 && ((valid_digits > 16)
284 || ((valid_digits > 8) && mode32))) {
285 /*
286 * This is to_integer operation case.
287 * No any restrictions for string-to-integer conversion,
288 * see ACPI spec.
289 */
290 goto error_exit;
291 }
292
293 /* Divide the digit into the correct position */
294
295 (void)acpi_ut_short_divide((dividend - (u64)this_digit),
296 base, "ient, NULL);
297
298 if (return_value > quotient) {
299 if (to_integer_op) {
300 goto error_exit;
301 } else {
302 break;
303 }
304 }
305
306 return_value *= base;
307 return_value += this_digit;
308 string++;
309 }
310
311 /* All done, normal exit */
312
313all_done:
314
315 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
316 ACPI_FORMAT_UINT64(return_value)));
317
318 *ret_integer = return_value;
319 return_ACPI_STATUS(AE_OK);
320
321error_exit:
322 /* Base was set/validated above */
323
324 if (base == 10) {
325 return_ACPI_STATUS(AE_BAD_DECIMAL_CONSTANT);
326 } else {
327 return_ACPI_STATUS(AE_BAD_HEX_CONSTANT);
328 }
329}
330
331/*******************************************************************************
332 *
333 * FUNCTION: acpi_ut_print_string
334 *
335 * PARAMETERS: string - Null terminated ASCII string
336 * max_length - Maximum output length. Used to constrain the
337 * length of strings during debug output only.
338 *
339 * RETURN: None
340 *
341 * DESCRIPTION: Dump an ASCII string with support for ACPI-defined escape
342 * sequences.
343 *
344 ******************************************************************************/
345
346void acpi_ut_print_string(char *string, u16 max_length)
347{
348 u32 i;
349
350 if (!string) {
351 acpi_os_printf("<\"NULL STRING PTR\">");
352 return;
353 }
354
355 acpi_os_printf("\"");
356 for (i = 0; string[i] && (i < max_length); i++) {
357
358 /* Escape sequences */
359
360 switch (string[i]) {
361 case 0x07:
362
363 acpi_os_printf("\\a"); /* BELL */
364 break;
365
366 case 0x08:
367
368 acpi_os_printf("\\b"); /* BACKSPACE */
369 break;
370
371 case 0x0C:
372
373 acpi_os_printf("\\f"); /* FORMFEED */
374 break;
375
376 case 0x0A:
377
378 acpi_os_printf("\\n"); /* LINEFEED */
379 break;
380
381 case 0x0D:
382
383 acpi_os_printf("\\r"); /* CARRIAGE RETURN */
384 break;
385
386 case 0x09:
387
388 acpi_os_printf("\\t"); /* HORIZONTAL TAB */
389 break;
390
391 case 0x0B:
392
393 acpi_os_printf("\\v"); /* VERTICAL TAB */
394 break;
395
396 case '\'': /* Single Quote */
397 case '\"': /* Double Quote */
398 case '\\': /* Backslash */
399
400 acpi_os_printf("\\%c", (int)string[i]);
401 break;
402
403 default:
404
405 /* Check for printable character or hex escape */
406
407 if (ACPI_IS_PRINT(string[i])) {
408 /* This is a normal character */
409
410 acpi_os_printf("%c", (int)string[i]);
411 } else {
412 /* All others will be Hex escapes */
413
414 acpi_os_printf("\\x%2.2X", (s32) string[i]);
415 }
416 break;
417 }
418 }
419 acpi_os_printf("\"");
420
421 if (i == max_length && string[i]) {
422 acpi_os_printf("...");
423 }
424}
425
426/*******************************************************************************
427 *
428 * FUNCTION: acpi_ut_valid_acpi_char
429 *
430 * PARAMETERS: char - The character to be examined
431 * position - Byte position (0-3)
432 *
433 * RETURN: TRUE if the character is valid, FALSE otherwise
434 *
435 * DESCRIPTION: Check for a valid ACPI character. Must be one of:
436 * 1) Upper case alpha
437 * 2) numeric
438 * 3) underscore
439 *
440 * We allow a '!' as the last character because of the ASF! table
441 *
442 ******************************************************************************/
443
444u8 acpi_ut_valid_acpi_char(char character, u32 position)
445{
446
447 if (!((character >= 'A' && character <= 'Z') ||
448 (character >= '0' && character <= '9') || (character == '_'))) {
449
450 /* Allow a '!' in the last position */
451
452 if (character == '!' && position == 3) {
453 return (TRUE);
454 }
455
456 return (FALSE);
457 }
458
459 return (TRUE);
460}
461
462/*******************************************************************************
463 *
464 * FUNCTION: acpi_ut_valid_acpi_name
465 *
466 * PARAMETERS: name - The name to be examined. Does not have to
467 * be NULL terminated string.
468 *
469 * RETURN: TRUE if the name is valid, FALSE otherwise
470 *
471 * DESCRIPTION: Check for a valid ACPI name. Each character must be one of:
472 * 1) Upper case alpha
473 * 2) numeric
474 * 3) underscore
475 *
476 ******************************************************************************/
477
478u8 acpi_ut_valid_acpi_name(char *name)
479{
480 u32 i;
481
482 ACPI_FUNCTION_ENTRY();
483
484 for (i = 0; i < ACPI_NAME_SIZE; i++) {
485 if (!acpi_ut_valid_acpi_char(name[i], i)) {
486 return (FALSE);
487 }
488 }
489
490 return (TRUE);
491}
492
493/*******************************************************************************
494 *
495 * FUNCTION: acpi_ut_repair_name
496 *
497 * PARAMETERS: name - The ACPI name to be repaired
498 *
499 * RETURN: Repaired version of the name
500 *
501 * DESCRIPTION: Repair an ACPI name: Change invalid characters to '*' and
502 * return the new name. NOTE: the Name parameter must reside in
503 * read/write memory, cannot be a const.
504 *
505 * An ACPI Name must consist of valid ACPI characters. We will repair the name
506 * if necessary because we don't want to abort because of this, but we want
507 * all namespace names to be printable. A warning message is appropriate.
508 *
509 * This issue came up because there are in fact machines that exhibit
510 * this problem, and we want to be able to enable ACPI support for them,
511 * even though there are a few bad names.
512 *
513 ******************************************************************************/
514
515void acpi_ut_repair_name(char *name)
516{
517 u32 i;
518 u8 found_bad_char = FALSE;
519 u32 original_name;
520
521 ACPI_FUNCTION_NAME(ut_repair_name);
522
523 ACPI_MOVE_NAME(&original_name, name);
524
525 /* Check each character in the name */
526
527 for (i = 0; i < ACPI_NAME_SIZE; i++) {
528 if (acpi_ut_valid_acpi_char(name[i], i)) {
529 continue;
530 }
531
532 /*
533 * Replace a bad character with something printable, yet technically
534 * still invalid. This prevents any collisions with existing "good"
535 * names in the namespace.
536 */
537 name[i] = '*';
538 found_bad_char = TRUE;
539 }
540
541 if (found_bad_char) {
542
543 /* Report warning only if in strict mode or debug mode */
544
545 if (!acpi_gbl_enable_interpreter_slack) {
546 ACPI_WARNING((AE_INFO,
547 "Invalid character(s) in name (0x%.8X), repaired: [%4.4s]",
548 original_name, name));
549 } else {
550 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
551 "Invalid character(s) in name (0x%.8X), repaired: [%4.4s]",
552 original_name, name));
553 }
554 }
555}
556
557#if defined ACPI_ASL_COMPILER || defined ACPI_EXEC_APP
558/*******************************************************************************
559 *
560 * FUNCTION: ut_convert_backslashes
561 *
562 * PARAMETERS: pathname - File pathname string to be converted
563 *
564 * RETURN: Modifies the input Pathname
565 *
566 * DESCRIPTION: Convert all backslashes (0x5C) to forward slashes (0x2F) within
567 * the entire input file pathname string.
568 *
569 ******************************************************************************/
570
571void ut_convert_backslashes(char *pathname)
572{
573
574 if (!pathname) {
575 return;
576 }
577
578 while (*pathname) {
579 if (*pathname == '\\') {
580 *pathname = '/';
581 }
582
583 pathname++;
584 }
585}
586#endif
587
588#if defined (ACPI_DEBUGGER) || defined (ACPI_APPLICATION)
589/*******************************************************************************
590 *
591 * FUNCTION: acpi_ut_safe_strcpy, acpi_ut_safe_strcat, acpi_ut_safe_strncat
592 *
593 * PARAMETERS: Adds a "DestSize" parameter to each of the standard string
594 * functions. This is the size of the Destination buffer.
595 *
596 * RETURN: TRUE if the operation would overflow the destination buffer.
597 *
598 * DESCRIPTION: Safe versions of standard Clib string functions. Ensure that
599 * the result of the operation will not overflow the output string
600 * buffer.
601 *
602 * NOTE: These functions are typically only helpful for processing
603 * user input and command lines. For most ACPICA code, the
604 * required buffer length is precisely calculated before buffer
605 * allocation, so the use of these functions is unnecessary.
606 *
607 ******************************************************************************/
608
609u8 acpi_ut_safe_strcpy(char *dest, acpi_size dest_size, char *source)
610{
611
612 if (ACPI_STRLEN(source) >= dest_size) {
613 return (TRUE);
614 }
615
616 ACPI_STRCPY(dest, source);
617 return (FALSE);
618}
619
620u8 acpi_ut_safe_strcat(char *dest, acpi_size dest_size, char *source)
621{
622
623 if ((ACPI_STRLEN(dest) + ACPI_STRLEN(source)) >= dest_size) {
624 return (TRUE);
625 }
626
627 ACPI_STRCAT(dest, source);
628 return (FALSE);
629}
630
631u8
632acpi_ut_safe_strncat(char *dest,
633 acpi_size dest_size,
634 char *source, acpi_size max_transfer_length)
635{
636 acpi_size actual_transfer_length;
637
638 actual_transfer_length =
639 ACPI_MIN(max_transfer_length, ACPI_STRLEN(source));
640
641 if ((ACPI_STRLEN(dest) + actual_transfer_length) >= dest_size) {
642 return (TRUE);
643 }
644
645 ACPI_STRNCAT(dest, source, max_transfer_length);
646 return (FALSE);
647}
648#endif