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42f8fb75 BM |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: utstring - Common functions for strings and characters | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
fbb7a2dc | 8 | * Copyright (C) 2000 - 2014, Intel Corp. |
42f8fb75 BM |
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 | |
49 | ACPI_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 | ******************************************************************************/ | |
69 | void 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 | ||
103 | int 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 | ||
135 | void 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 | ||
172 | acpi_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: | |
1d1ea1b7 | 189 | |
42f8fb75 BM |
190 | break; |
191 | ||
192 | default: | |
1d1ea1b7 | 193 | |
42f8fb75 | 194 | /* Invalid Base */ |
1d1ea1b7 | 195 | |
42f8fb75 BM |
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 | ||
10622bf8 | 313 | all_done: |
42f8fb75 BM |
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 | ||
10622bf8 | 321 | error_exit: |
42f8fb75 BM |
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 | |
0fb3adf8 BM |
336 | * max_length - Maximum output length. Used to constrain the |
337 | * length of strings during debug output only. | |
42f8fb75 BM |
338 | * |
339 | * RETURN: None | |
340 | * | |
341 | * DESCRIPTION: Dump an ASCII string with support for ACPI-defined escape | |
342 | * sequences. | |
343 | * | |
344 | ******************************************************************************/ | |
345 | ||
0fb3adf8 | 346 | void acpi_ut_print_string(char *string, u16 max_length) |
42f8fb75 BM |
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: | |
1d1ea1b7 | 362 | |
42f8fb75 BM |
363 | acpi_os_printf("\\a"); /* BELL */ |
364 | break; | |
365 | ||
366 | case 0x08: | |
1d1ea1b7 | 367 | |
42f8fb75 BM |
368 | acpi_os_printf("\\b"); /* BACKSPACE */ |
369 | break; | |
370 | ||
371 | case 0x0C: | |
1d1ea1b7 | 372 | |
42f8fb75 BM |
373 | acpi_os_printf("\\f"); /* FORMFEED */ |
374 | break; | |
375 | ||
376 | case 0x0A: | |
1d1ea1b7 | 377 | |
42f8fb75 BM |
378 | acpi_os_printf("\\n"); /* LINEFEED */ |
379 | break; | |
380 | ||
381 | case 0x0D: | |
1d1ea1b7 | 382 | |
42f8fb75 BM |
383 | acpi_os_printf("\\r"); /* CARRIAGE RETURN */ |
384 | break; | |
385 | ||
386 | case 0x09: | |
1d1ea1b7 | 387 | |
42f8fb75 BM |
388 | acpi_os_printf("\\t"); /* HORIZONTAL TAB */ |
389 | break; | |
390 | ||
391 | case 0x0B: | |
1d1ea1b7 | 392 | |
42f8fb75 BM |
393 | acpi_os_printf("\\v"); /* VERTICAL TAB */ |
394 | break; | |
395 | ||
396 | case '\'': /* Single Quote */ | |
397 | case '\"': /* Double Quote */ | |
398 | case '\\': /* Backslash */ | |
1d1ea1b7 | 399 | |
42f8fb75 BM |
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 | ||
444 | u8 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 | * | |
de8e7db7 BM |
466 | * PARAMETERS: name - The name to be examined. Does not have to |
467 | * be NULL terminated string. | |
42f8fb75 BM |
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 | ||
de8e7db7 | 478 | u8 acpi_ut_valid_acpi_name(char *name) |
42f8fb75 BM |
479 | { |
480 | u32 i; | |
481 | ||
482 | ACPI_FUNCTION_ENTRY(); | |
483 | ||
484 | for (i = 0; i < ACPI_NAME_SIZE; i++) { | |
de8e7db7 | 485 | if (!acpi_ut_valid_acpi_char(name[i], i)) { |
42f8fb75 BM |
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 | ||
515 | void 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 | ||
571 | void 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 | |
73424473 BM |
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 | ||
609 | u8 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 | ||
620 | u8 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 | ||
631 | u8 | |
632 | acpi_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 |