[deliverable/linux.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 ACPI_ANY_BASE;
 *                                ACPI_ANY_BASE means 'in behalf of to_integer'
 *              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 current mode
 *              of the interpreter.
 *
 * NOTES:       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.
 *
 *              Does not support Octal strings, not needed at this time.
 *
 *              There is an earlier version of the function after this one,
 *              below. It is slightly different than this one, and the two
 *              may eventually may need to be merged. (01/2016).
 *
 ******************************************************************************/

acpi_status acpi_ut_strtoul64(char *string, u32 base, u64 *ret_integer)
{
	u32 this_digit = 0;
	u64 return_value = 0;
	u64 quotient;
	u64 dividend;
	u32 to_integer_op = (base == ACPI_ANY_BASE);
	u32 mode32 = (acpi_gbl_integer_byte_width == 4);
	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 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 (to_integer_op) {
		/*
		 * Base equal to ACPI_ANY_BASE means 'ToInteger operation case'.
		 * 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 (to_integer_op) {
			goto error_exit;
		} else {
			goto all_done;
		}
	}

	/*
	 * Perform a 32-bit or 64-bit conversion, depending upon the current
	 * execution mode of the interpreter
	 */
	dividend = (mode32) ? 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 (to_integer_op) {
				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) && mode32))) {
			/*
			 * This is to_integer operation case.
			 * No any 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 (to_integer_op) {
				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 */

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

#ifdef _OBSOLETE_FUNCTIONS
/* TBD: use version in ACPICA main code base? */
/* DONE: 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	*
	208	* PARAMETERS: string - Null terminated string
	209	* base - Radix of the string: 16 or ACPI_ANY_BASE;
	210	* ACPI_ANY_BASE means 'in behalf of to_integer'
	211	* ret_integer - Where the converted integer is returned
	212	*
	213	* RETURN: Status and Converted value
	214	*
	215	* DESCRIPTION: Convert a string into an unsigned value. Performs either a
	216	* 32-bit or 64-bit conversion, depending on the current mode
	217	* of the interpreter.
	218	*
50db3052 BM	219	* NOTES: acpi_gbl_integer_byte_width should be set to the proper width.
	220	* For the core ACPICA code, this width depends on the DSDT
	221	* version. For iASL, the default byte width is always 8.
	222	*
	223	* Does not support Octal strings, not needed at this time.
	224	*
	225	* There is an earlier version of the function after this one,
	226	* below. It is slightly different than this one, and the two
	227	* may eventually may need to be merged. (01/2016).
27629196 BM	228	*
	229	******************************************************************************/
	230
	231	acpi_status acpi_ut_strtoul64(char string, u32 base, u64 ret_integer)
	232	{
	233	u32 this_digit = 0;
	234	u64 return_value = 0;
	235	u64 quotient;
	236	u64 dividend;
	237	u32 to_integer_op = (base == ACPI_ANY_BASE);
	238	u32 mode32 = (acpi_gbl_integer_byte_width == 4);
	239	u8 valid_digits = 0;
	240	u8 sign_of0x = 0;
	241	u8 term = 0;
	242
27eb7485	243	ACPI_FUNCTION_TRACE_STR(ut_strtoul64, string);
27629196 BM	244
	245	switch (base) {
	246	case ACPI_ANY_BASE:
	247	case 16:
	248
	249	break;
	250
	251	default:
	252
	253	/* Invalid Base */
	254
	255	return_ACPI_STATUS(AE_BAD_PARAMETER);
	256	}
	257
	258	if (!string) {
	259	goto error_exit;
	260	}
	261
	262	/* Skip over any white space in the buffer */
	263
	264	while ((string) && (isspace((int)string) \|\| *string == '\t')) {
	265	string++;
	266	}
	267
	268	if (to_integer_op) {
	269	/*
	270	* Base equal to ACPI_ANY_BASE means 'ToInteger operation case'.
	271	* We need to determine if it is decimal or hexadecimal.
	272	*/
	273	if ((string == '0') && (tolower((int)(string + 1)) == 'x')) {
	274	sign_of0x = 1;
	275	base = 16;
	276
	277	/* Skip over the leading '0x' */
	278	string += 2;
	279	} else {
	280	base = 10;
	281	}
	282	}
	283
	284	/* Any string left? Check that '0x' is not followed by white space. */
	285
	286	if (!(string) \|\| isspace((int)string) \|\| *string == '\t') {
	287	if (to_integer_op) {
	288	goto error_exit;
	289	} else {
	290	goto all_done;
	291	}
	292	}
	293
	294	/*
	295	* Perform a 32-bit or 64-bit conversion, depending upon the current
	296	* execution mode of the interpreter
	297	*/
	298	dividend = (mode32) ? ACPI_UINT32_MAX : ACPI_UINT64_MAX;
	299
	300	/* Main loop: convert the string to a 32- or 64-bit integer */
	301
	302	while (*string) {
	303	if (isdigit((int)*string)) {
	304
	305	/* Convert ASCII 0-9 to Decimal value */
	306
	307	this_digit = ((u8)*string) - '0';
308	} else if (base == 10) {
309
310	/* Digit is out of range; possible in to_integer case only */
311
312	term = 1;
313	} else {
314	this_digit = (u8)toupper((int)*string);
315	if (isxdigit((int)this_digit)) {
316
317	/* Convert ASCII Hex char to value */
318
319	this_digit = this_digit - 'A' + 10;
320	} else {
321	term = 1;
322	}
323	}
324
325	if (term) {
326	if (to_integer_op) {
327	goto error_exit;
328	} else {
329	break;
330	}
331	} else if ((valid_digits == 0) && (this_digit == 0)
332	&& !sign_of0x) {
333
334	/* Skip zeros */
335	string++;
336	continue;
337	}
338
339	valid_digits++;
340
341	if (sign_of0x
342	&& ((valid_digits > 16)
343	\|\| ((valid_digits > 8) && mode32))) {
344	/*
345	* This is to_integer operation case.
346	* No any restrictions for string-to-integer conversion,
347	* see ACPI spec.
348	*/
349	goto error_exit;
350	}
351
352	/* Divide the digit into the correct position */
353
1fad8738 BM	354	(void)acpi_ut_short_divide((dividend - (u64)this_digit), base,
1fad8738 BM	355	&quotient, NULL);
27629196 BM	356
	357	if (return_value > quotient) {
	358	if (to_integer_op) {
	359	goto error_exit;
	360	} else {
	361	break;
	362	}
	363	}
	364
	365	return_value *= base;
	366	return_value += this_digit;
	367	string++;
	368	}
	369
	370	/* All done, normal exit */
	371
	372	all_done:
	373
	374	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
	375	ACPI_FORMAT_UINT64(return_value)));
	376
	377	*ret_integer = return_value;
	378	return_ACPI_STATUS(AE_OK);
	379
	380	error_exit:
	381	/* Base was set/validated above */
	382
	383	if (base == 10) {
	384	return_ACPI_STATUS(AE_BAD_DECIMAL_CONSTANT);
	385	} else {
	386	return_ACPI_STATUS(AE_BAD_HEX_CONSTANT);
	387	}
	388	}
	389
50db3052 BM	390	#ifdef _OBSOLETE_FUNCTIONS
	391	/* TBD: use version in ACPICA main code base? */
	392	/* DONE: 01/2016 */
	393
27629196 BM	394	/*******************************************************************************
27629196 BM	395	*
50db3052	396	* FUNCTION: strtoul64
27629196	397	*
50db3052 BM	398	* PARAMETERS: string - Null terminated string
	399	* terminater - Where a pointer to the terminating byte
	400	* is returned
	401	* base - Radix of the string
27629196	402	*
50db3052	403	* RETURN: Converted value
27629196	404	*
50db3052	405	* DESCRIPTION: Convert a string into an unsigned value.
27629196 BM	406	*
	407	******************************************************************************/
	408
50db3052	409	acpi_status strtoul64(char string, u32 base, u64 ret_integer)
27629196	410	{
50db3052 BM	411	u32 index;
	412	u32 sign;
	413	u64 return_value = 0;
	414	acpi_status status = AE_OK;
27629196	415
50db3052 BM	416	*ret_integer = 0;
	417
	418	switch (base) {
	419	case 0:
	420	case 8:
	421	case 10:
	422	case 16:
	423
	424	break;
	425
	426	default:
	427	/*
	428	* The specified Base parameter is not in the domain of
	429	* this function:
	430	*/
	431	return (AE_BAD_PARAMETER);
27629196 BM	432	}
27629196 BM	433
50db3052	434	/* Skip over any white space in the buffer: */
27629196	435
50db3052 BM	436	while (isspace((int)string) \|\| string == '\t') {
	437	++string;
	438	}
27629196	439
50db3052 BM	440	/*
	441	* The buffer may contain an optional plus or minus sign.
	442	* If it does, then skip over it but remember what is was:
	443	*/
	444	if (*string == '-') {
	445	sign = ACPI_SIGN_NEGATIVE;
	446	++string;
	447	} else if (*string == '+') {
	448	++string;
	449	sign = ACPI_SIGN_POSITIVE;
	450	} else {
	451	sign = ACPI_SIGN_POSITIVE;
27629196 BM	452	}
27629196 BM	453
50db3052 BM	454	/*
	455	* If the input parameter Base is zero, then we need to
	456	* determine if it is octal, decimal, or hexadecimal:
	457	*/
	458	if (base == 0) {
	459	if (*string == '0') {
	460	if (tolower((int)*(++string)) == 'x') {
	461	base = 16;
	462	++string;
	463	} else {
	464	base = 8;
	465	}
	466	} else {
	467	base = 10;
	468	}
	469	}
27629196	470
50db3052 BM	471	/*
	472	* For octal and hexadecimal bases, skip over the leading
	473	* 0 or 0x, if they are present.
	474	*/
	475	if (base == 8 && *string == '0') {
	476	string++;
	477	}
27629196	478
50db3052 BM	479	if (base == 16 && string == '0' && tolower((int)(++string)) == 'x') {
	480	string++;
	481	}
27629196	482
50db3052 BM	483	/* Main loop: convert the string to an unsigned long */
	484
	485	while (*string) {
	486	if (isdigit((int)*string)) {
	487	index = ((u8)*string) - '0';
	488	} else {
	489	index = (u8)toupper((int)*string);
	490	if (isupper((int)index)) {
	491	index = index - 'A' + 10;
	492	} else {
	493	goto error_exit;
	494	}
	495	}
	496
	497	if (index >= base) {
	498	goto error_exit;
	499	}
	500
	501	/* Check to see if value is out of range: */
	502
	503	if (return_value > ((ACPI_UINT64_MAX - (u64)index) / (u64)base)) {
	504	goto error_exit;
	505	} else {
	506	return_value *= base;
	507	return_value += index;
	508	}
	509
	510	++string;
27629196 BM	511	}
27629196 BM	512
50db3052 BM	513	/* If a minus sign was present, then "the conversion is negated": */
	514
	515	if (sign == ACPI_SIGN_NEGATIVE) {
	516	return_value = (ACPI_UINT32_MAX - return_value) + 1;
	517	}
	518
	519	*ret_integer = return_value;
	520	return (status);
	521
	522	error_exit:
	523	switch (base) {
	524	case 8:
	525
	526	status = AE_BAD_OCTAL_CONSTANT;
	527	break;
	528
	529	case 10:
	530
	531	status = AE_BAD_DECIMAL_CONSTANT;
	532	break;
	533
	534	case 16:
	535
	536	status = AE_BAD_HEX_CONSTANT;
	537	break;
	538
	539	default:
	540
	541	/* Base validated above */
	542
	543	break;
	544	}
	545
	546	return (status);
27629196 BM	547	}
27629196 BM	548	#endif