[linux-2.6-block.git] / drivers / acpi / acpica / utnonansi.c

/*******************************************************************************
 *
 * Module Name: utnonansi - Non-ansi C library functions
 *
 ******************************************************************************/

/*
 * Copyright (C) 2000 - 2016, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <acpi/acpi.h>
#include "accommon.h"

#define _COMPONENT          ACPI_UTILITIES
ACPI_MODULE_NAME("utnonansi")

/*
 * Non-ANSI C library functions - strlwr, strupr, stricmp, and a 64-bit
 * version of strtoul.
 */
/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_strlwr (strlwr)
 *
 * PARAMETERS:  src_string      - The source string to convert
 *
 * RETURN:      None
 *
 * DESCRIPTION: Convert a string to lowercase
 *
 ******************************************************************************/
void acpi_ut_strlwr(char *src_string)
{
	char *string;

	ACPI_FUNCTION_ENTRY();

	if (!src_string) {
		return;
	}

	/* Walk entire string, lowercasing the letters */

	for (string = src_string; *string; string++) {
		*string = (char)tolower((int)*string);
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_strupr (strupr)
 *
 * PARAMETERS:  src_string      - The source string to convert
 *
 * RETURN:      None
 *
 * DESCRIPTION: Convert a string to uppercase
 *
 ******************************************************************************/

void acpi_ut_strupr(char *src_string)
{
	char *string;

	ACPI_FUNCTION_ENTRY();

	if (!src_string) {
		return;
	}

	/* Walk entire string, uppercasing the letters */

	for (string = src_string; *string; string++) {
		*string = (char)toupper((int)*string);
	}
}

/******************************************************************************
 *
 * FUNCTION:    acpi_ut_stricmp (stricmp)
 *
 * PARAMETERS:  string1             - first string to compare
 *              string2             - second string to compare
 *
 * RETURN:      int that signifies string relationship. Zero means strings
 *              are equal.
 *
 * DESCRIPTION: Case-insensitive string compare. Implementation of the
 *              non-ANSI stricmp function.
 *
 ******************************************************************************/

int acpi_ut_stricmp(char *string1, char *string2)
{
	int c1;
	int c2;

	do {
		c1 = tolower((int)*string1);
		c2 = tolower((int)*string2);

		string1++;
		string2++;
	}
	while ((c1 == c2) && (c1));

	return (c1 - c2);
}

#if defined (ACPI_DEBUGGER) || defined (ACPI_APPLICATION)
/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_safe_strcpy, acpi_ut_safe_strcat, acpi_ut_safe_strncat
 *
 * PARAMETERS:  Adds a "DestSize" parameter to each of the standard string
 *              functions. This is the size of the Destination buffer.
 *
 * RETURN:      TRUE if the operation would overflow the destination buffer.
 *
 * DESCRIPTION: Safe versions of standard Clib string functions. Ensure that
 *              the result of the operation will not overflow the output string
 *              buffer.
 *
 * NOTE:        These functions are typically only helpful for processing
 *              user input and command lines. For most ACPICA code, the
 *              required buffer length is precisely calculated before buffer
 *              allocation, so the use of these functions is unnecessary.
 *
 ******************************************************************************/

u8 acpi_ut_safe_strcpy(char *dest, acpi_size dest_size, char *source)
{

	if (strlen(source) >= dest_size) {
		return (TRUE);
	}

	strcpy(dest, source);
	return (FALSE);
}

u8 acpi_ut_safe_strcat(char *dest, acpi_size dest_size, char *source)
{

	if ((strlen(dest) + strlen(source)) >= dest_size) {
		return (TRUE);
	}

	strcat(dest, source);
	return (FALSE);
}

u8
acpi_ut_safe_strncat(char *dest,
		     acpi_size dest_size,
		     char *source, acpi_size max_transfer_length)
{
	acpi_size actual_transfer_length;

	actual_transfer_length = ACPI_MIN(max_transfer_length, strlen(source));

	if ((strlen(dest) + actual_transfer_length) >= dest_size) {
		return (TRUE);
	}

	strncat(dest, source, max_transfer_length);
	return (FALSE);
}
#endif

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_strtoul64
 *
 * PARAMETERS:  string                  - Null terminated string
 *              base                    - Radix of the string: 16 or 10 or
 *                                        ACPI_ANY_BASE
 *              max_integer_byte_width  - Maximum allowable integer,in bytes:
 *                                        4 or 8 (32 or 64 bits)
 *              ret_integer             - Where the converted integer is
 *                                        returned
 *
 * RETURN:      Status and Converted value
 *
 * DESCRIPTION: Convert a string into an unsigned value. Performs either a
 *              32-bit or 64-bit conversion, depending on the input integer
 *              size (often the current mode of the interpreter).
 *
 * NOTES:       Negative numbers are not supported, as they are not supported
 *              by ACPI.
 *
 *              acpi_gbl_integer_byte_width should be set to the proper width.
 *              For the core ACPICA code, this width depends on the DSDT
 *              version. For iASL, the default byte width is always 8 for the
 *              parser, but error checking is performed later to flag cases
 *              where a 64-bit constant is defined in a 32-bit DSDT/SSDT.
 *
 *              Does not support Octal strings, not needed at this time.
 *
 ******************************************************************************/

acpi_status
acpi_ut_strtoul64(char *string,
		  u32 base, u32 max_integer_byte_width, u64 *ret_integer)
{
	u32 this_digit = 0;
	u64 return_value = 0;
	u64 quotient;
	u64 dividend;
	u8 valid_digits = 0;
	u8 sign_of0x = 0;
	u8 term = 0;

	ACPI_FUNCTION_TRACE_STR(ut_strtoul64, string);

	switch (base) {
	case ACPI_ANY_BASE:
	case 10:
	case 16:

		break;

	default:

		/* Invalid Base */

		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	if (!string) {
		goto error_exit;
	}

	/* Skip over any white space in the buffer */

	while ((*string) && (isspace((int)*string) || *string == '\t')) {
		string++;
	}

	if (base == ACPI_ANY_BASE) {
		/*
		 * Base equal to ACPI_ANY_BASE means 'Either decimal or hex'.
		 * We need to determine if it is decimal or hexadecimal.
		 */
		if ((*string == '0') && (tolower((int)*(string + 1)) == 'x')) {
			sign_of0x = 1;
			base = 16;

			/* Skip over the leading '0x' */
			string += 2;
		} else {
			base = 10;
		}
	}

	/* Any string left? Check that '0x' is not followed by white space. */

	if (!(*string) || isspace((int)*string) || *string == '\t') {
		if (base == ACPI_ANY_BASE) {
			goto error_exit;
		} else {
			goto all_done;
		}
	}

	/*
	 * Perform a 32-bit or 64-bit conversion, depending upon the input
	 * byte width
	 */
	dividend = (max_integer_byte_width <= ACPI_MAX32_BYTE_WIDTH) ?
	    ACPI_UINT32_MAX : ACPI_UINT64_MAX;

	/* Main loop: convert the string to a 32- or 64-bit integer */

	while (*string) {
		if (isdigit((int)*string)) {

			/* Convert ASCII 0-9 to Decimal value */

			this_digit = ((u8)*string) - '0';
		} else if (base == 10) {

			/* Digit is out of range; possible in to_integer case only */

			term = 1;
		} else {
			this_digit = (u8)toupper((int)*string);
			if (isxdigit((int)this_digit)) {

				/* Convert ASCII Hex char to value */

				this_digit = this_digit - 'A' + 10;
			} else {
				term = 1;
			}
		}

		if (term) {
			if (base == ACPI_ANY_BASE) {
				goto error_exit;
			} else {
				break;
			}
		} else if ((valid_digits == 0) && (this_digit == 0)
			   && !sign_of0x) {

			/* Skip zeros */
			string++;
			continue;
		}

		valid_digits++;

		if (sign_of0x && ((valid_digits > 16) ||
				  ((valid_digits > 8)
				   && (max_integer_byte_width <=
				       ACPI_MAX32_BYTE_WIDTH)))) {
			/*
			 * This is to_integer operation case.
			 * No restrictions for string-to-integer conversion,
			 * see ACPI spec.
			 */
			goto error_exit;
		}

		/* Divide the digit into the correct position */

		(void)acpi_ut_short_divide((dividend - (u64)this_digit), base,
					   &quotient, NULL);

		if (return_value > quotient) {
			if (base == ACPI_ANY_BASE) {
				goto error_exit;
			} else {
				break;
			}
		}

		return_value *= base;
		return_value += this_digit;
		string++;
	}

	/* All done, normal exit */

all_done:

	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
			  ACPI_FORMAT_UINT64(return_value)));

	*ret_integer = return_value;
	return_ACPI_STATUS(AE_OK);

error_exit:

	/* Base was set/validated above (10 or 16) */

	if (base == 10) {
		return_ACPI_STATUS(AE_BAD_DECIMAL_CONSTANT);
	} else {
		return_ACPI_STATUS(AE_BAD_HEX_CONSTANT);
	}
}

#ifdef _OBSOLETE_FUNCTIONS
/* Removed: 01/2016 */

/*******************************************************************************
 *
 * FUNCTION:    strtoul64
 *
 * PARAMETERS:  string              - Null terminated string
 *              terminater          - Where a pointer to the terminating byte
 *                                    is returned
 *              base                - Radix of the string
 *
 * RETURN:      Converted value
 *
 * DESCRIPTION: Convert a string into an unsigned value.
 *
 ******************************************************************************/

acpi_status strtoul64(char *string, u32 base, u64 *ret_integer)
{
	u32 index;
	u32 sign;
	u64 return_value = 0;
	acpi_status status = AE_OK;

	*ret_integer = 0;

	switch (base) {
	case 0:
	case 8:
	case 10:
	case 16:

		break;

	default:
		/*
		 * The specified Base parameter is not in the domain of
		 * this function:
		 */
		return (AE_BAD_PARAMETER);
	}

	/* Skip over any white space in the buffer: */

	while (isspace((int)*string) || *string == '\t') {
		++string;
	}

	/*
	 * The buffer may contain an optional plus or minus sign.
	 * If it does, then skip over it but remember what is was:
	 */
	if (*string == '-') {
		sign = ACPI_SIGN_NEGATIVE;
		++string;
	} else if (*string == '+') {
		++string;
		sign = ACPI_SIGN_POSITIVE;
	} else {
		sign = ACPI_SIGN_POSITIVE;
	}

	/*
	 * If the input parameter Base is zero, then we need to
	 * determine if it is octal, decimal, or hexadecimal:
	 */
	if (base == 0) {
		if (*string == '0') {
			if (tolower((int)*(++string)) == 'x') {
				base = 16;
				++string;
			} else {
				base = 8;
			}
		} else {
			base = 10;
		}
	}

	/*
	 * For octal and hexadecimal bases, skip over the leading
	 * 0 or 0x, if they are present.
	 */
	if (base == 8 && *string == '0') {
		string++;
	}

	if (base == 16 && *string == '0' && tolower((int)*(++string)) == 'x') {
		string++;
	}

	/* Main loop: convert the string to an unsigned long */

	while (*string) {
		if (isdigit((int)*string)) {
			index = ((u8)*string) - '0';
		} else {
			index = (u8)toupper((int)*string);
			if (isupper((int)index)) {
				index = index - 'A' + 10;
			} else {
				goto error_exit;
			}
		}

		if (index >= base) {
			goto error_exit;
		}

		/* Check to see if value is out of range: */

		if (return_value > ((ACPI_UINT64_MAX - (u64)index) / (u64)base)) {
			goto error_exit;
		} else {
			return_value *= base;
			return_value += index;
		}

		++string;
	}

	/* If a minus sign was present, then "the conversion is negated": */

	if (sign == ACPI_SIGN_NEGATIVE) {
		return_value = (ACPI_UINT32_MAX - return_value) + 1;
	}

	*ret_integer = return_value;
	return (status);

error_exit:
	switch (base) {
	case 8:

		status = AE_BAD_OCTAL_CONSTANT;
		break;

	case 10:

		status = AE_BAD_DECIMAL_CONSTANT;
		break;

	case 16:

		status = AE_BAD_HEX_CONSTANT;
		break;

	default:

		/* Base validated above */

		break;
	}

	return (status);
}
#endif
Commit	Line	Data
27629196 BM	1	/*******************************************************************************
	2	*
	3	* Module Name: utnonansi - Non-ansi C library functions
	4	*
	5	******************************************************************************/
	6
	7	/*
c8100dc4	8	* Copyright (C) 2000 - 2016, Intel Corp.
27629196 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
	47	#define _COMPONENT ACPI_UTILITIES
	48	ACPI_MODULE_NAME("utnonansi")
	49
	50	/*
	51	* Non-ANSI C library functions - strlwr, strupr, stricmp, and a 64-bit
	52	* version of strtoul.
	53	*/
	54	/*******************************************************************************
	55	*
	56	* FUNCTION: acpi_ut_strlwr (strlwr)
	57	*
	58	* PARAMETERS: src_string - The source string to convert
	59	*
	60	* RETURN: None
	61	*
	62	* DESCRIPTION: Convert a string to lowercase
	63	*
	64	******************************************************************************/
	65	void acpi_ut_strlwr(char *src_string)
	66	{
	67	char *string;
	68
	69	ACPI_FUNCTION_ENTRY();
	70
	71	if (!src_string) {
	72	return;
73	}
74
75	/* Walk entire string, lowercasing the letters */
76
77	for (string = src_string; *string; string++) {
78	string = (char)tolower((int)string);
79	}
80	}
81
82	/*******************************************************************************
83	*
84	* FUNCTION: acpi_ut_strupr (strupr)
85	*
86	* PARAMETERS: src_string - The source string to convert
87	*
88	* RETURN: None
89	*
90	* DESCRIPTION: Convert a string to uppercase
91	*
92	******************************************************************************/
93
94	void acpi_ut_strupr(char *src_string)
95	{
96	char *string;
97
98	ACPI_FUNCTION_ENTRY();
99
100	if (!src_string) {
101	return;
102	}
103
104	/* Walk entire string, uppercasing the letters */
105
106	for (string = src_string; *string; string++) {
107	string = (char)toupper((int)string);
108	}
109	}
110
111	/******************************************************************************
112	*
113	* FUNCTION: acpi_ut_stricmp (stricmp)
114	*
115	* PARAMETERS: string1 - first string to compare
116	* string2 - second string to compare
117	*
118	* RETURN: int that signifies string relationship. Zero means strings
119	* are equal.
120	*
121	* DESCRIPTION: Case-insensitive string compare. Implementation of the
122	* non-ANSI stricmp function.
123	*
124	******************************************************************************/
125
126	int acpi_ut_stricmp(char string1, char string2)
127	{
128	int c1;
129	int c2;
130
131	do {
132	c1 = tolower((int)*string1);
133	c2 = tolower((int)*string2);
134
135	string1++;
136	string2++;
137	}
138	while ((c1 == c2) && (c1));
139
140	return (c1 - c2);
141	}
142
50db3052 BM	143	#if defined (ACPI_DEBUGGER) \|\| defined (ACPI_APPLICATION)
	144	/*******************************************************************************
	145	*
	146	* FUNCTION: acpi_ut_safe_strcpy, acpi_ut_safe_strcat, acpi_ut_safe_strncat
	147	*
	148	* PARAMETERS: Adds a "DestSize" parameter to each of the standard string
	149	* functions. This is the size of the Destination buffer.
	150	*
	151	* RETURN: TRUE if the operation would overflow the destination buffer.
	152	*
	153	* DESCRIPTION: Safe versions of standard Clib string functions. Ensure that
	154	* the result of the operation will not overflow the output string
	155	* buffer.
	156	*
	157	* NOTE: These functions are typically only helpful for processing
	158	* user input and command lines. For most ACPICA code, the
	159	* required buffer length is precisely calculated before buffer
	160	* allocation, so the use of these functions is unnecessary.
	161	*
	162	******************************************************************************/
	163
	164	u8 acpi_ut_safe_strcpy(char dest, acpi_size dest_size, char source)
	165	{
	166
	167	if (strlen(source) >= dest_size) {
	168	return (TRUE);
	169	}
	170
	171	strcpy(dest, source);
	172	return (FALSE);
	173	}
	174
	175	u8 acpi_ut_safe_strcat(char dest, acpi_size dest_size, char source)
	176	{
	177
	178	if ((strlen(dest) + strlen(source)) >= dest_size) {
	179	return (TRUE);
	180	}
	181
	182	strcat(dest, source);
	183	return (FALSE);
	184	}
	185
	186	u8
	187	acpi_ut_safe_strncat(char *dest,
	188	acpi_size dest_size,
	189	char *source, acpi_size max_transfer_length)
	190	{
	191	acpi_size actual_transfer_length;
	192
	193	actual_transfer_length = ACPI_MIN(max_transfer_length, strlen(source));
	194
	195	if ((strlen(dest) + actual_transfer_length) >= dest_size) {
	196	return (TRUE);
	197	}
	198
	199	strncat(dest, source, max_transfer_length);
	200	return (FALSE);
	201	}
	202	#endif
	203
27629196 BM	204	/*******************************************************************************
	205	*
	206	* FUNCTION: acpi_ut_strtoul64
	207	*
3a05be75 BM	208	* PARAMETERS: string - Null terminated string
	209	* base - Radix of the string: 16 or 10 or
	210	* ACPI_ANY_BASE
	211	* max_integer_byte_width - Maximum allowable integer,in bytes:
	212	* 4 or 8 (32 or 64 bits)
	213	* ret_integer - Where the converted integer is
	214	* returned
27629196 BM	215	*
	216	* RETURN: Status and Converted value
	217	*
	218	* DESCRIPTION: Convert a string into an unsigned value. Performs either a
3a05be75 BM	219	* 32-bit or 64-bit conversion, depending on the input integer
3a05be75 BM	220	* size (often the current mode of the interpreter).
27629196	221	*
3a05be75 BM	222	* NOTES: Negative numbers are not supported, as they are not supported
	223	* by ACPI.
	224	*
	225	* acpi_gbl_integer_byte_width should be set to the proper width.
50db3052	226	* For the core ACPICA code, this width depends on the DSDT
3a05be75 BM	227	* version. For iASL, the default byte width is always 8 for the
	228	* parser, but error checking is performed later to flag cases
	229	* where a 64-bit constant is defined in a 32-bit DSDT/SSDT.
50db3052 BM	230	*
	231	* Does not support Octal strings, not needed at this time.
	232	*
27629196 BM	233	******************************************************************************/
27629196 BM	234
3a05be75 BM	235	acpi_status
	236	acpi_ut_strtoul64(char *string,
	237	u32 base, u32 max_integer_byte_width, u64 *ret_integer)
27629196 BM	238	{
	239	u32 this_digit = 0;
	240	u64 return_value = 0;
	241	u64 quotient;
	242	u64 dividend;
27629196 BM	243	u8 valid_digits = 0;
	244	u8 sign_of0x = 0;
	245	u8 term = 0;
	246
27eb7485	247	ACPI_FUNCTION_TRACE_STR(ut_strtoul64, string);
27629196 BM	248
	249	switch (base) {
	250	case ACPI_ANY_BASE:
3a05be75	251	case 10:
27629196 BM	252	case 16:
	253
	254	break;
	255
	256	default:
	257
	258	/* Invalid Base */
	259
	260	return_ACPI_STATUS(AE_BAD_PARAMETER);
	261	}
	262
	263	if (!string) {
	264	goto error_exit;
	265	}
	266
	267	/* Skip over any white space in the buffer */
	268
	269	while ((string) && (isspace((int)string) \|\| *string == '\t')) {
	270	string++;
	271	}
	272
3a05be75	273	if (base == ACPI_ANY_BASE) {
27629196	274	/*
3a05be75	275	* Base equal to ACPI_ANY_BASE means 'Either decimal or hex'.
27629196 BM	276	* We need to determine if it is decimal or hexadecimal.
	277	*/
	278	if ((string == '0') && (tolower((int)(string + 1)) == 'x')) {
	279	sign_of0x = 1;
	280	base = 16;
	281
	282	/* Skip over the leading '0x' */
	283	string += 2;
	284	} else {
	285	base = 10;
	286	}
	287	}
	288
	289	/* Any string left? Check that '0x' is not followed by white space. */
	290
	291	if (!(string) \|\| isspace((int)string) \|\| *string == '\t') {
3a05be75	292	if (base == ACPI_ANY_BASE) {
27629196 BM	293	goto error_exit;
	294	} else {
	295	goto all_done;
	296	}
	297	}
	298
	299	/*
3a05be75 BM	300	* Perform a 32-bit or 64-bit conversion, depending upon the input
3a05be75 BM	301	* byte width
27629196	302	*/
3a05be75 BM	303	dividend = (max_integer_byte_width <= ACPI_MAX32_BYTE_WIDTH) ?
3a05be75 BM	304	ACPI_UINT32_MAX : ACPI_UINT64_MAX;
27629196 BM	305
	306	/* Main loop: convert the string to a 32- or 64-bit integer */
	307
	308	while (*string) {
	309	if (isdigit((int)*string)) {
	310
	311	/* Convert ASCII 0-9 to Decimal value */
	312
	313	this_digit = ((u8)*string) - '0';
	314	} else if (base == 10) {
	315
	316	/* Digit is out of range; possible in to_integer case only */
	317
	318	term = 1;
	319	} else {
	320	this_digit = (u8)toupper((int)*string);
	321	if (isxdigit((int)this_digit)) {
	322
	323	/* Convert ASCII Hex char to value */
	324
	325	this_digit = this_digit - 'A' + 10;
	326	} else {
	327	term = 1;
	328	}
	329	}
	330
	331	if (term) {
3a05be75	332	if (base == ACPI_ANY_BASE) {
27629196 BM	333	goto error_exit;
	334	} else {
	335	break;
	336	}
	337	} else if ((valid_digits == 0) && (this_digit == 0)
	338	&& !sign_of0x) {
	339
	340	/* Skip zeros */
	341	string++;
	342	continue;
	343	}
	344
	345	valid_digits++;
	346
3a05be75 BM	347	if (sign_of0x && ((valid_digits > 16) \|\|
	348	((valid_digits > 8)
	349	&& (max_integer_byte_width <=
	350	ACPI_MAX32_BYTE_WIDTH)))) {
27629196 BM	351	/*
27629196 BM	352	* This is to_integer operation case.
3a05be75	353	* No restrictions for string-to-integer conversion,
27629196 BM	354	* see ACPI spec.
	355	*/
	356	goto error_exit;
	357	}
	358
	359	/* Divide the digit into the correct position */
	360
1fad8738 BM	361	(void)acpi_ut_short_divide((dividend - (u64)this_digit), base,
1fad8738 BM	362	&quotient, NULL);
27629196 BM	363
27629196 BM	364	if (return_value > quotient) {
3a05be75	365	if (base == ACPI_ANY_BASE) {
27629196 BM	366	goto error_exit;
	367	} else {
	368	break;
	369	}
	370	}
	371
	372	return_value *= base;
	373	return_value += this_digit;
	374	string++;
	375	}
	376
	377	/* All done, normal exit */
	378
	379	all_done:
	380
	381	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
	382	ACPI_FORMAT_UINT64(return_value)));
	383
	384	*ret_integer = return_value;
	385	return_ACPI_STATUS(AE_OK);
	386
	387	error_exit:
3a05be75 BM	388
3a05be75 BM	389	/* Base was set/validated above (10 or 16) */
27629196 BM	390
	391	if (base == 10) {
	392	return_ACPI_STATUS(AE_BAD_DECIMAL_CONSTANT);
	393	} else {
	394	return_ACPI_STATUS(AE_BAD_HEX_CONSTANT);
	395	}
	396	}
	397
50db3052	398	#ifdef _OBSOLETE_FUNCTIONS
3a05be75	399	/* Removed: 01/2016 */
50db3052	400
27629196 BM	401	/*******************************************************************************
27629196 BM	402	*
50db3052	403	* FUNCTION: strtoul64
27629196	404	*
50db3052 BM	405	* PARAMETERS: string - Null terminated string
	406	* terminater - Where a pointer to the terminating byte
	407	* is returned
	408	* base - Radix of the string
27629196	409	*
50db3052	410	* RETURN: Converted value
27629196	411	*
50db3052	412	* DESCRIPTION: Convert a string into an unsigned value.
27629196 BM	413	*
	414	******************************************************************************/
	415
50db3052	416	acpi_status strtoul64(char string, u32 base, u64 ret_integer)
27629196	417	{
50db3052 BM	418	u32 index;
	419	u32 sign;
	420	u64 return_value = 0;
	421	acpi_status status = AE_OK;
27629196	422
50db3052 BM	423	*ret_integer = 0;
	424
	425	switch (base) {
	426	case 0:
	427	case 8:
	428	case 10:
	429	case 16:
	430
	431	break;
	432
	433	default:
	434	/*
	435	* The specified Base parameter is not in the domain of
	436	* this function:
	437	*/
	438	return (AE_BAD_PARAMETER);
27629196 BM	439	}
27629196 BM	440
50db3052	441	/* Skip over any white space in the buffer: */
27629196	442
50db3052 BM	443	while (isspace((int)string) \|\| string == '\t') {
	444	++string;
	445	}
27629196	446
50db3052 BM	447	/*
	448	* The buffer may contain an optional plus or minus sign.
	449	* If it does, then skip over it but remember what is was:
	450	*/
	451	if (*string == '-') {
	452	sign = ACPI_SIGN_NEGATIVE;
	453	++string;
	454	} else if (*string == '+') {
	455	++string;
	456	sign = ACPI_SIGN_POSITIVE;
	457	} else {
	458	sign = ACPI_SIGN_POSITIVE;
27629196 BM	459	}
27629196 BM	460
50db3052 BM	461	/*
	462	* If the input parameter Base is zero, then we need to
	463	* determine if it is octal, decimal, or hexadecimal:
	464	*/
	465	if (base == 0) {
	466	if (*string == '0') {
	467	if (tolower((int)*(++string)) == 'x') {
	468	base = 16;
	469	++string;
	470	} else {
	471	base = 8;
	472	}
	473	} else {
	474	base = 10;
	475	}
	476	}
27629196	477
50db3052 BM	478	/*
	479	* For octal and hexadecimal bases, skip over the leading
	480	* 0 or 0x, if they are present.
	481	*/
	482	if (base == 8 && *string == '0') {
	483	string++;
	484	}
27629196	485
50db3052 BM	486	if (base == 16 && string == '0' && tolower((int)(++string)) == 'x') {
	487	string++;
	488	}
27629196	489
50db3052 BM	490	/* Main loop: convert the string to an unsigned long */
	491
	492	while (*string) {
	493	if (isdigit((int)*string)) {
	494	index = ((u8)*string) - '0';
	495	} else {
	496	index = (u8)toupper((int)*string);
	497	if (isupper((int)index)) {
	498	index = index - 'A' + 10;
	499	} else {
	500	goto error_exit;
	501	}
	502	}
	503
	504	if (index >= base) {
	505	goto error_exit;
	506	}
	507
	508	/* Check to see if value is out of range: */
	509
	510	if (return_value > ((ACPI_UINT64_MAX - (u64)index) / (u64)base)) {
	511	goto error_exit;
	512	} else {
	513	return_value *= base;
	514	return_value += index;
	515	}
	516
	517	++string;
27629196 BM	518	}
27629196 BM	519
50db3052 BM	520	/* If a minus sign was present, then "the conversion is negated": */
	521
	522	if (sign == ACPI_SIGN_NEGATIVE) {
	523	return_value = (ACPI_UINT32_MAX - return_value) + 1;
	524	}
	525
	526	*ret_integer = return_value;
	527	return (status);
	528
	529	error_exit:
	530	switch (base) {
	531	case 8:
	532
	533	status = AE_BAD_OCTAL_CONSTANT;
	534	break;
	535
	536	case 10:
	537
	538	status = AE_BAD_DECIMAL_CONSTANT;
	539	break;
	540
	541	case 16:
	542
	543	status = AE_BAD_HEX_CONSTANT;
	544	break;
	545
	546	default:
	547
	548	/* Base validated above */
	549
	550	break;
	551	}
	552
	553	return (status);
27629196 BM	554	}
27629196 BM	555	#endif