| blob | fd7796fee501d8b8ceec9d49c87985601e134e04 |
1 /******************************************************************************
2 *
3 * Module Name: cmclib - Local implementation of C library functions
4 *
5 *****************************************************************************/
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************/
117 #define __CMCLIB_C__
122 /*
123 * These implementations of standard C Library routines can optionally be
124 * used if a C library is not available. In general, they are less efficient
125 * than an inline or assembly implementation
126 */
128 #define _COMPONENT ACPI_UTILITIES
132 #ifndef ACPI_USE_SYSTEM_CLIBRARY
134 #define NEGATIVE 1
135 #define POSITIVE 0
138 /*******************************************************************************
139 *
140 * FUNCTION: AcpiUtMemcmp (memcmp)
141 *
142 * PARAMETERS: Buffer1 - First Buffer
143 * Buffer2 - Second Buffer
144 * Count - Maximum # of bytes to compare
145 *
146 * RETURN: Index where Buffers mismatched, or 0 if Buffers matched
147 *
148 * DESCRIPTION: Compare two Buffers, with a maximum length
149 *
150 ******************************************************************************/
152 int
156 ACPI_SIZE Count)
157 {
160 {
161 }
165 }
168 /*******************************************************************************
169 *
170 * FUNCTION: AcpiUtMemcpy (memcpy)
171 *
172 * PARAMETERS: Dest - Target of the copy
173 * Src - Source buffer to copy
174 * Count - Number of bytes to copy
175 *
176 * RETURN: Dest
177 *
178 * DESCRIPTION: Copy arbitrary bytes of memory
179 *
180 ******************************************************************************/
186 ACPI_SIZE Count)
187 {
193 {
195 New++;
196 Old++;
197 Count--;
198 }
201 }
204 /*******************************************************************************
205 *
206 * FUNCTION: AcpiUtMemset (memset)
207 *
208 * PARAMETERS: Dest - Buffer to set
209 * Value - Value to set each byte of memory
210 * Count - Number of bytes to set
211 *
212 * RETURN: Dest
213 *
214 * DESCRIPTION: Initialize a buffer to a known value.
215 *
216 ******************************************************************************/
221 UINT8 Value,
222 ACPI_SIZE Count)
223 {
228 {
230 New++;
231 Count--;
232 }
235 }
238 /*******************************************************************************
239 *
240 * FUNCTION: AcpiUtStrlen (strlen)
241 *
242 * PARAMETERS: String - Null terminated string
243 *
244 * RETURN: Length
245 *
246 * DESCRIPTION: Returns the length of the input string
247 *
248 ******************************************************************************/
251 ACPI_SIZE
254 {
258 /* Count the string until a null is encountered */
261 {
262 Length++;
263 String++;
264 }
267 }
270 /*******************************************************************************
271 *
272 * FUNCTION: AcpiUtStrcpy (strcpy)
273 *
274 * PARAMETERS: DstString - Target of the copy
275 * SrcString - The source string to copy
276 *
277 * RETURN: DstString
278 *
279 * DESCRIPTION: Copy a null terminated string
280 *
281 ******************************************************************************/
287 {
291 /* Move bytes brute force */
294 {
297 String++;
298 SrcString++;
299 }
301 /* Null terminate */
305 }
308 /*******************************************************************************
309 *
310 * FUNCTION: AcpiUtStrncpy (strncpy)
311 *
312 * PARAMETERS: DstString - Target of the copy
313 * SrcString - The source string to copy
314 * Count - Maximum # of bytes to copy
315 *
316 * RETURN: DstString
317 *
318 * DESCRIPTION: Copy a null terminated string, with a maximum length
319 *
320 ******************************************************************************/
326 ACPI_SIZE Count)
327 {
331 /* Copy the string */
335 {;}
337 /* Pad with nulls if necessary */
340 {
342 String++;
343 }
345 /* Return original pointer */
348 }
351 /*******************************************************************************
352 *
353 * FUNCTION: AcpiUtStrcmp (strcmp)
354 *
355 * PARAMETERS: String1 - First string
356 * String2 - Second string
357 *
358 * RETURN: Index where strings mismatched, or 0 if strings matched
359 *
360 * DESCRIPTION: Compare two null terminated strings
361 *
362 ******************************************************************************/
364 int
368 {
372 {
374 {
376 }
377 }
380 }
383 #ifdef ACPI_FUTURE_IMPLEMENTATION
384 /* Not used at this time */
385 /*******************************************************************************
386 *
387 * FUNCTION: AcpiUtStrchr (strchr)
388 *
389 * PARAMETERS: String - Search string
390 * ch - character to search for
391 *
392 * RETURN: Ptr to char or NULL if not found
393 *
394 * DESCRIPTION: Search a string for a character
395 *
396 ******************************************************************************/
402 {
406 {
408 {
410 }
411 }
414 }
415 #endif
417 /*******************************************************************************
418 *
419 * FUNCTION: AcpiUtStrncmp (strncmp)
420 *
421 * PARAMETERS: String1 - First string
422 * String2 - Second string
423 * Count - Maximum # of bytes to compare
424 *
425 * RETURN: Index where strings mismatched, or 0 if strings matched
426 *
427 * DESCRIPTION: Compare two null terminated strings, with a maximum length
428 *
429 ******************************************************************************/
431 int
435 ACPI_SIZE Count)
436 {
440 {
442 {
444 }
445 }
449 }
452 /*******************************************************************************
453 *
454 * FUNCTION: AcpiUtStrcat (Strcat)
455 *
456 * PARAMETERS: DstString - Target of the copy
457 * SrcString - The source string to copy
458 *
459 * RETURN: DstString
460 *
461 * DESCRIPTION: Append a null terminated string to a null terminated string
462 *
463 ******************************************************************************/
469 {
473 /* Find end of the destination string */
476 { ; }
478 /* Concatenate the string */
481 { ; }
484 }
487 /*******************************************************************************
488 *
489 * FUNCTION: AcpiUtStrncat (strncat)
490 *
491 * PARAMETERS: DstString - Target of the copy
492 * SrcString - The source string to copy
493 * Count - Maximum # of bytes to copy
494 *
495 * RETURN: DstString
496 *
497 * DESCRIPTION: Append a null terminated string to a null terminated string,
498 * with a maximum count.
499 *
500 ******************************************************************************/
506 ACPI_SIZE Count)
507 {
512 {
513 /* Find end of the destination string */
516 { ; }
518 /* Concatenate the string */
521 { ; }
523 /* Null terminate if necessary */
526 {
528 }
529 }
532 }
535 /*******************************************************************************
536 *
537 * FUNCTION: AcpiUtStrstr (strstr)
538 *
539 * PARAMETERS: String1 - Target string
540 * String2 - Substring to search for
541 *
542 * RETURN: Where substring match starts, Null if no match found
543 *
544 * DESCRIPTION: Checks if String2 occurs in String1. This is not really a
545 * full implementation of strstr, only sufficient for command
546 * matching
547 *
548 ******************************************************************************/
554 {
559 {
561 }
563 /* Walk entire string, comparing the letters */
566 {
568 {
570 }
572 String2++;
573 String++;
574 }
577 }
580 /*******************************************************************************
581 *
582 * FUNCTION: AcpiUtStrtoul (strtoul)
583 *
584 * PARAMETERS: String - Null terminated string
585 * Terminater - Where a pointer to the terminating byte is
586 * returned
587 * Base - Radix of the string
588 *
589 * RETURN: Converted value
590 *
591 * DESCRIPTION: Convert a string into a 32-bit unsigned value.
592 * Note: use AcpiUtStrtoul64 for 64-bit integers.
593 *
594 ******************************************************************************/
596 UINT32
600 UINT32 Base)
601 {
603 UINT32 index;
604 UINT32 sign;
610 /*
611 * Save the value of the pointer to the buffer's first
612 * character, save the current errno value, and then
613 * skip over any white space in the buffer:
614 */
617 {
619 }
621 /*
622 * The buffer may contain an optional plus or minus sign.
623 * If it does, then skip over it but remember what is was:
624 */
626 {
629 }
631 {
634 }
635 else
636 {
638 }
640 /*
641 * If the input parameter Base is zero, then we need to
642 * determine if it is octal, decimal, or hexadecimal:
643 */
645 {
647 {
649 {
652 }
653 else
654 {
656 }
657 }
658 else
659 {
661 }
662 }
664 {
665 /*
666 * The specified Base parameter is not in the domain of
667 * this function:
668 */
670 }
672 /*
673 * For octal and hexadecimal bases, skip over the leading
674 * 0 or 0x, if they are present.
675 */
677 {
678 String++;
679 }
684 {
685 String++;
686 }
688 /*
689 * Main loop: convert the string to an unsigned long:
690 */
692 {
694 {
696 }
697 else
698 {
701 {
703 }
704 else
705 {
707 }
708 }
711 {
713 }
715 /*
716 * Check to see if value is out of range:
717 */
721 {
724 }
725 else
726 {
730 }
733 }
735 done:
736 /*
737 * If appropriate, update the caller's pointer to the next
738 * unconverted character in the buffer.
739 */
741 {
743 {
745 }
746 else
747 {
749 }
750 }
753 {
755 }
757 /*
758 * If a minus sign was present, then "the conversion is negated":
759 */
761 {
763 }
766 }
769 /*******************************************************************************
770 *
771 * FUNCTION: AcpiUtToUpper (TOUPPER)
772 *
773 * PARAMETERS: c - Character to convert
774 *
775 * RETURN: Converted character as an int
776 *
777 * DESCRIPTION: Convert character to uppercase
778 *
779 ******************************************************************************/
781 int
784 {
787 }
790 /*******************************************************************************
791 *
792 * FUNCTION: AcpiUtToLower (TOLOWER)
793 *
794 * PARAMETERS: c - Character to convert
795 *
796 * RETURN: Converted character as an int
797 *
798 * DESCRIPTION: Convert character to lowercase
799 *
800 ******************************************************************************/
802 int
805 {
808 }
811 /*******************************************************************************
812 *
813 * FUNCTION: is* functions
814 *
815 * DESCRIPTION: is* functions use the ctype table below
816 *
817 ******************************************************************************/
957 };