1 /*******************************************************************************
3 * Module Name: utnonansi - Non-ansi C library functions
5 ******************************************************************************/
8 * Copyright (C) 2000 - 2016, Intel Corp.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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.
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
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48 #define _COMPONENT ACPI_UTILITIES
49 ACPI_MODULE_NAME ("utnonansi")
53 * Non-ANSI C library functions - strlwr, strupr, stricmp, and a 64-bit
57 /*******************************************************************************
59 * FUNCTION: AcpiUtStrlwr (strlwr)
61 * PARAMETERS: SrcString - The source string to convert
65 * DESCRIPTION: Convert a string to lowercase
67 ******************************************************************************/
76 ACPI_FUNCTION_ENTRY ();
84 /* Walk entire string, lowercasing the letters */
86 for (String = SrcString; *String; String++)
88 *String = (char) tolower ((int) *String);
93 /*******************************************************************************
95 * FUNCTION: AcpiUtStrupr (strupr)
97 * PARAMETERS: SrcString - The source string to convert
101 * DESCRIPTION: Convert a string to uppercase
103 ******************************************************************************/
112 ACPI_FUNCTION_ENTRY ();
120 /* Walk entire string, uppercasing the letters */
122 for (String = SrcString; *String; String++)
124 *String = (char) toupper ((int) *String);
129 /******************************************************************************
131 * FUNCTION: AcpiUtStricmp (stricmp)
133 * PARAMETERS: String1 - first string to compare
134 * String2 - second string to compare
136 * RETURN: int that signifies string relationship. Zero means strings
139 * DESCRIPTION: Case-insensitive string compare. Implementation of the
140 * non-ANSI stricmp function.
142 ******************************************************************************/
155 c1 = tolower ((int) *String1);
156 c2 = tolower ((int) *String2);
161 while ((c1 == c2) && (c1));
167 #if defined (ACPI_DEBUGGER) || defined (ACPI_APPLICATION)
168 /*******************************************************************************
170 * FUNCTION: AcpiUtSafeStrcpy, AcpiUtSafeStrcat, AcpiUtSafeStrncat
172 * PARAMETERS: Adds a "DestSize" parameter to each of the standard string
173 * functions. This is the size of the Destination buffer.
175 * RETURN: TRUE if the operation would overflow the destination buffer.
177 * DESCRIPTION: Safe versions of standard Clib string functions. Ensure that
178 * the result of the operation will not overflow the output string
181 * NOTE: These functions are typically only helpful for processing
182 * user input and command lines. For most ACPICA code, the
183 * required buffer length is precisely calculated before buffer
184 * allocation, so the use of these functions is unnecessary.
186 ******************************************************************************/
195 if (strlen (Source) >= DestSize)
200 strcpy (Dest, Source);
211 if ((strlen (Dest) + strlen (Source)) >= DestSize)
216 strcat (Dest, Source);
225 ACPI_SIZE MaxTransferLength)
227 ACPI_SIZE ActualTransferLength;
230 ActualTransferLength = ACPI_MIN (MaxTransferLength, strlen (Source));
232 if ((strlen (Dest) + ActualTransferLength) >= DestSize)
237 strncat (Dest, Source, MaxTransferLength);
243 /*******************************************************************************
245 * FUNCTION: AcpiUtStrtoul64
247 * PARAMETERS: String - Null terminated string
248 * Base - Radix of the string: 16 or ACPI_ANY_BASE;
249 * ACPI_ANY_BASE means 'in behalf of ToInteger'
250 * RetInteger - Where the converted integer is returned
252 * RETURN: Status and Converted value
254 * DESCRIPTION: Convert a string into an unsigned value. Performs either a
255 * 32-bit or 64-bit conversion, depending on the current mode
256 * of the interpreter.
258 * NOTES: AcpiGbl_IntegerByteWidth should be set to the proper width.
259 * For the core ACPICA code, this width depends on the DSDT
260 * version. For iASL, the default byte width is always 8.
262 * Does not support Octal strings, not needed at this time.
264 * There is an earlier version of the function after this one,
265 * below. It is slightly different than this one, and the two
266 * may eventually may need to be merged. (01/2016).
268 ******************************************************************************/
276 UINT32 ThisDigit = 0;
277 UINT64 ReturnValue = 0;
280 UINT32 ToIntegerOp = (Base == ACPI_ANY_BASE);
281 UINT32 Mode32 = (AcpiGbl_IntegerByteWidth == 4);
282 UINT8 ValidDigits = 0;
287 ACPI_FUNCTION_TRACE_STR (UtStrtoul64, String);
301 return_ACPI_STATUS (AE_BAD_PARAMETER);
309 /* Skip over any white space in the buffer */
311 while ((*String) && (isspace ((int) *String) || *String == '\t'))
319 * Base equal to ACPI_ANY_BASE means 'ToInteger operation case'.
320 * We need to determine if it is decimal or hexadecimal.
322 if ((*String == '0') && (tolower ((int) *(String + 1)) == 'x'))
327 /* Skip over the leading '0x' */
336 /* Any string left? Check that '0x' is not followed by white space. */
338 if (!(*String) || isspace ((int) *String) || *String == '\t')
351 * Perform a 32-bit or 64-bit conversion, depending upon the current
352 * execution mode of the interpreter
354 Dividend = (Mode32) ? ACPI_UINT32_MAX : ACPI_UINT64_MAX;
356 /* Main loop: convert the string to a 32- or 64-bit integer */
360 if (isdigit ((int) *String))
362 /* Convert ASCII 0-9 to Decimal value */
364 ThisDigit = ((UINT8) *String) - '0';
368 /* Digit is out of range; possible in ToInteger case only */
374 ThisDigit = (UINT8) toupper ((int) *String);
375 if (isxdigit ((int) ThisDigit))
377 /* Convert ASCII Hex char to value */
379 ThisDigit = ThisDigit - 'A' + 10;
398 else if ((ValidDigits == 0) && (ThisDigit == 0) && !SignOf0x)
407 if (SignOf0x && ((ValidDigits > 16) || ((ValidDigits > 8) && Mode32)))
410 * This is ToInteger operation case.
411 * No any restrictions for string-to-integer conversion,
417 /* Divide the digit into the correct position */
419 (void) AcpiUtShortDivide (
420 (Dividend - (UINT64) ThisDigit), Base, &Quotient, NULL);
422 if (ReturnValue > Quotient)
435 ReturnValue += ThisDigit;
439 /* All done, normal exit */
443 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
444 ACPI_FORMAT_UINT64 (ReturnValue)));
446 *RetInteger = ReturnValue;
447 return_ACPI_STATUS (AE_OK);
451 /* Base was set/validated above */
455 return_ACPI_STATUS (AE_BAD_DECIMAL_CONSTANT);
459 return_ACPI_STATUS (AE_BAD_HEX_CONSTANT);
463 #ifdef _OBSOLETE_FUNCTIONS
464 /* TBD: use version in ACPICA main code base? */
467 /*******************************************************************************
469 * FUNCTION: strtoul64
471 * PARAMETERS: String - Null terminated string
472 * Terminater - Where a pointer to the terminating byte
474 * Base - Radix of the string
476 * RETURN: Converted value
478 * DESCRIPTION: Convert a string into an unsigned value.
480 ******************************************************************************/
490 UINT64 ReturnValue = 0;
491 ACPI_STATUS Status = AE_OK;
507 * The specified Base parameter is not in the domain of
510 return (AE_BAD_PARAMETER);
513 /* Skip over any white space in the buffer: */
515 while (isspace ((int) *String) || *String == '\t')
521 * The buffer may contain an optional plus or minus sign.
522 * If it does, then skip over it but remember what is was:
526 Sign = ACPI_SIGN_NEGATIVE;
529 else if (*String == '+')
532 Sign = ACPI_SIGN_POSITIVE;
536 Sign = ACPI_SIGN_POSITIVE;
540 * If the input parameter Base is zero, then we need to
541 * determine if it is octal, decimal, or hexadecimal:
547 if (tolower ((int) *(++String)) == 'x')
564 * For octal and hexadecimal bases, skip over the leading
565 * 0 or 0x, if they are present.
567 if (Base == 8 && *String == '0')
574 tolower ((int) *(++String)) == 'x')
579 /* Main loop: convert the string to an unsigned long */
583 if (isdigit ((int) *String))
585 Index = ((UINT8) *String) - '0';
589 Index = (UINT8) toupper ((int) *String);
590 if (isupper ((int) Index))
592 Index = Index - 'A' + 10;
605 /* Check to see if value is out of range: */
607 if (ReturnValue > ((ACPI_UINT64_MAX - (UINT64) Index) /
615 ReturnValue += Index;
622 /* If a minus sign was present, then "the conversion is negated": */
624 if (Sign == ACPI_SIGN_NEGATIVE)
626 ReturnValue = (ACPI_UINT32_MAX - ReturnValue) + 1;
629 *RetInteger = ReturnValue;
638 Status = AE_BAD_OCTAL_CONSTANT;
643 Status = AE_BAD_DECIMAL_CONSTANT;
648 Status = AE_BAD_HEX_CONSTANT;
653 /* Base validated above */