acpi/acpica/utstrsuppt.c

1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
4  * Module Name: utstrsuppt - Support functions for string-to-integer conversion
27  * PARAMETERS:  string                  - Null terminated input string
28  *              return_value_ptr        - Where the converted value is returned
30  * RETURN:      Status and 64-bit converted integer
32  * DESCRIPTION: Performs a base 8 conversion of the input string to an
35  * NOTE:        Maximum 64-bit unsigned octal value is 01777777777777777777777
36  *              Maximum 32-bit unsigned octal value is 037777777777
49 		 * Character must be ASCII 0-7, otherwise:  in acpi_ut_convert_octal_string()
81  * PARAMETERS:  string                  - Null terminated input string
82  *              return_value_ptr        - Where the converted value is returned
84  * RETURN:      Status and 64-bit converted integer
86  * DESCRIPTION: Performs a base 10 conversion of the input string to an
89  * NOTE:        Maximum 64-bit unsigned decimal value is 18446744073709551615
90  *              Maximum 32-bit unsigned decimal value is 4294967295
103 		 * Character must be ASCII 0-9, otherwise:  in acpi_ut_convert_decimal_string()
135  * PARAMETERS:  string                  - Null terminated input string
136  *              return_value_ptr        - Where the converted value is returned
138  * RETURN:      Status and 64-bit converted integer
140  * DESCRIPTION: Performs a base 16 conversion of the input string to an
143  * NOTE:        Maximum 64-bit unsigned hex value is 0xFFFFFFFFFFFFFFFF
144  *              Maximum 32-bit unsigned hex value is 0xFFFFFFFF
157 		 * Character must be ASCII A-F, a-f, or 0-9, otherwise:  in acpi_ut_convert_hex_string()
189  * PARAMETERS:  string                  - Pointer to input ASCII string
192  *              used by the caller to detect end-of-string.
196  *              to check for the end of the string (NULL terminator).
214  * PARAMETERS:  string                  - Pointer to input ASCII string
217  *              used by the caller to detect end-of-string.
221  *              to check for the end of the string (NULL terminator).
239  * PARAMETERS:  string                  - Pointer to input ASCII string
241  * RETURN:      TRUE if a "0x" prefix was found at the start of the string
263  * PARAMETERS:  string                  - Pointer to input ASCII string
283  * PARAMETERS:  string                  - Pointer to input ASCII string
285  * RETURN:      True if an octal "0" prefix was found at the start of the
307  * PARAMETERS:  accumulated_value       - Current value of the integer value
310  *              base                    - Radix, either 8/10/16
311  *              ascii_digit             - ASCII single digit to be inserted
313  * RETURN:      Status and result of the convert/insert operation. The only
314  *              possible returned exception code is numeric overflow of
315  *              either the multiply or add conversion operations.
317  * DESCRIPTION: Generic conversion and insertion function for all bases:
357  * PARAMETERS:  multiplicand            - Current accumulated converted integer
358  *              base                    - Base/Radix
359  *              out_product             - Where the product is returned
361  * RETURN:      Status and 64-bit product
363  * DESCRIPTION: Multiply two 64-bit values, with checking for 64-bit overflow as
364  *              well as 32-bit overflow if necessary (if the current global
383 	 * Check for 64-bit overflow before the actual multiplication.  in acpi_ut_strtoul_multiply64()
385 	 * Notes: 64-bit division is often not supported on 32-bit platforms  in acpi_ut_strtoul_multiply64()
387 	 * 64-bit divide function. Also, Multiplier is currently only used  in acpi_ut_strtoul_multiply64()
397 	/* Check for 32-bit overflow if necessary */  in acpi_ut_strtoul_multiply64()
411  * PARAMETERS:  addend1                 - Current accumulated converted integer
412  *              digit                   - New hex value/char
413  *              out_sum                 - Where sum is returned (Accumulator)
415  * RETURN:      Status and 64-bit sum
417  * DESCRIPTION: Add two 64-bit values, with checking for 64-bit overflow as
418  *              well as 32-bit overflow if necessary (if the current global
427 	/* Check for 64-bit overflow before the actual addition */  in acpi_ut_strtoul_add64()
429 	if ((addend1 > 0) && (digit > (ACPI_UINT64_MAX - addend1))) {  in acpi_ut_strtoul_add64()
435 	/* Check for 32-bit overflow if necessary */  in acpi_ut_strtoul_add64()