diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpica/Makefile | 1 | ||||
| -rw-r--r-- | drivers/acpi/acpica/acinterp.h | 6 | ||||
| -rw-r--r-- | drivers/acpi/acpica/acutils.h | 31 | ||||
| -rw-r--r-- | drivers/acpi/acpica/dbconvert.c | 5 | ||||
| -rw-r--r-- | drivers/acpi/acpica/dswexec.c | 2 | ||||
| -rw-r--r-- | drivers/acpi/acpica/exconcat.c | 2 | ||||
| -rw-r--r-- | drivers/acpi/acpica/exconvrt.c | 30 | ||||
| -rw-r--r-- | drivers/acpi/acpica/exmisc.c | 2 | ||||
| -rw-r--r-- | drivers/acpi/acpica/exresop.c | 2 | ||||
| -rw-r--r-- | drivers/acpi/acpica/nsconvert.c | 4 | ||||
| -rw-r--r-- | drivers/acpi/acpica/utstrsuppt.c | 417 | ||||
| -rw-r--r-- | drivers/acpi/acpica/utstrtoul64.c | 420 |
12 files changed, 673 insertions, 249 deletions
diff --git a/drivers/acpi/acpica/Makefile b/drivers/acpi/acpica/Makefile index 1709551bc4aa..2d09b0249ac8 100644 --- a/drivers/acpi/acpica/Makefile +++ b/drivers/acpi/acpica/Makefile @@ -177,6 +177,7 @@ acpi-y += \ utresrc.o \ utstate.o \ utstring.o \ + utstrsuppt.o \ utstrtoul64.o \ utxface.o \ utxfinit.o \ diff --git a/drivers/acpi/acpica/acinterp.h b/drivers/acpi/acpica/acinterp.h index 29a863c85318..29555c8789a3 100644 --- a/drivers/acpi/acpica/acinterp.h +++ b/drivers/acpi/acpica/acinterp.h @@ -101,7 +101,8 @@ typedef const struct acpi_exdump_info { */ acpi_status acpi_ex_convert_to_integer(union acpi_operand_object *obj_desc, - union acpi_operand_object **result_desc, u32 flags); + union acpi_operand_object **result_desc, + u32 implicit_conversion); acpi_status acpi_ex_convert_to_buffer(union acpi_operand_object *obj_desc, @@ -424,9 +425,6 @@ acpi_ex_store_object_to_node(union acpi_operand_object *source_desc, struct acpi_walk_state *walk_state, u8 implicit_conversion); -#define ACPI_IMPLICIT_CONVERSION TRUE -#define ACPI_NO_IMPLICIT_CONVERSION FALSE - /* * exstoren - resolve/store object */ diff --git a/drivers/acpi/acpica/acutils.h b/drivers/acpi/acpica/acutils.h index 745134ade35f..7a568c604a75 100644 --- a/drivers/acpi/acpica/acutils.h +++ b/drivers/acpi/acpica/acutils.h @@ -141,6 +141,11 @@ extern const char *acpi_gbl_ptyp_decode[]; #define ACPI_MSG_SUFFIX \ acpi_os_printf (" (%8.8X/%s-%u)\n", ACPI_CA_VERSION, module_name, line_number) +/* Flags to indicate implicit or explicit string-to-integer conversion */ + +#define ACPI_IMPLICIT_CONVERSION TRUE +#define ACPI_NO_IMPLICIT_CONVERSION FALSE + /* Types for Resource descriptor entries */ #define ACPI_INVALID_RESOURCE 0 @@ -197,15 +202,29 @@ void acpi_ut_strlwr(char *src_string); int acpi_ut_stricmp(char *string1, char *string2); -acpi_status acpi_ut_strtoul64(char *string, u32 flags, u64 *ret_integer); +/* + * utstrsuppt - string-to-integer conversion support functions + */ +acpi_status acpi_ut_convert_octal_string(char *string, u64 *return_value); + +acpi_status acpi_ut_convert_decimal_string(char *string, u64 *return_value_ptr); + +acpi_status acpi_ut_convert_hex_string(char *string, u64 *return_value_ptr); + +char acpi_ut_remove_leading_zeros(char **string); + +u8 acpi_ut_detect_hex_prefix(char **string); + +u8 acpi_ut_detect_octal_prefix(char **string); /* - * Values for Flags above - * Note: LIMIT values correspond to acpi_gbl_integer_byte_width values (4/8) + * utstrtoul64 - string-to-integer conversion functions */ -#define ACPI_STRTOUL_32BIT 0x04 /* 4 bytes */ -#define ACPI_STRTOUL_64BIT 0x08 /* 8 bytes */ -#define ACPI_STRTOUL_BASE16 0x10 /* Default: Base10/16 */ +acpi_status acpi_ut_strtoul64(char *string, u64 *ret_integer); + +u64 acpi_ut_explicit_strtoul64(char *string); + +u64 acpi_ut_implicit_strtoul64(char *string); /* * utglobal - Global data structures and procedures diff --git a/drivers/acpi/acpica/dbconvert.c b/drivers/acpi/acpica/dbconvert.c index 857dbc43a9b1..32d546f0db2f 100644 --- a/drivers/acpi/acpica/dbconvert.c +++ b/drivers/acpi/acpica/dbconvert.c @@ -277,10 +277,7 @@ acpi_db_convert_to_object(acpi_object_type type, default: object->type = ACPI_TYPE_INTEGER; - status = acpi_ut_strtoul64(string, - (acpi_gbl_integer_byte_width | - ACPI_STRTOUL_BASE16), - &object->integer.value); + status = acpi_ut_strtoul64(string, &object->integer.value); break; } diff --git a/drivers/acpi/acpica/dswexec.c b/drivers/acpi/acpica/dswexec.c index 20d7744b06ae..22f45d090733 100644 --- a/drivers/acpi/acpica/dswexec.c +++ b/drivers/acpi/acpica/dswexec.c @@ -134,7 +134,7 @@ acpi_ds_get_predicate_value(struct acpi_walk_state *walk_state, * object. Implicitly convert the argument if necessary. */ status = acpi_ex_convert_to_integer(obj_desc, &local_obj_desc, - ACPI_STRTOUL_BASE16); + ACPI_IMPLICIT_CONVERSION); if (ACPI_FAILURE(status)) { goto cleanup; } diff --git a/drivers/acpi/acpica/exconcat.c b/drivers/acpi/acpica/exconcat.c index 76bfb7dcae2f..59b8de2f07d3 100644 --- a/drivers/acpi/acpica/exconcat.c +++ b/drivers/acpi/acpica/exconcat.c @@ -156,7 +156,7 @@ acpi_ex_do_concatenate(union acpi_operand_object *operand0, status = acpi_ex_convert_to_integer(local_operand1, &temp_operand1, - ACPI_STRTOUL_BASE16); + ACPI_IMPLICIT_CONVERSION); break; case ACPI_TYPE_BUFFER: diff --git a/drivers/acpi/acpica/exconvrt.c b/drivers/acpi/acpica/exconvrt.c index f71028e334ee..23ebadb06a95 100644 --- a/drivers/acpi/acpica/exconvrt.c +++ b/drivers/acpi/acpica/exconvrt.c @@ -57,10 +57,10 @@ acpi_ex_convert_to_ascii(u64 integer, u16 base, u8 *string, u8 max_length); * * FUNCTION: acpi_ex_convert_to_integer * - * PARAMETERS: obj_desc - Object to be converted. Must be an - * Integer, Buffer, or String - * result_desc - Where the new Integer object is returned - * flags - Used for string conversion + * PARAMETERS: obj_desc - Object to be converted. Must be an + * Integer, Buffer, or String + * result_desc - Where the new Integer object is returned + * implicit_conversion - Used for string conversion * * RETURN: Status * @@ -70,14 +70,14 @@ acpi_ex_convert_to_ascii(u64 integer, u16 base, u8 *string, u8 max_length); acpi_status acpi_ex_convert_to_integer(union acpi_operand_object *obj_desc, - union acpi_operand_object **result_desc, u32 flags) + union acpi_operand_object **result_desc, + u32 implicit_conversion) { union acpi_operand_object *return_desc; u8 *pointer; u64 result; u32 i; u32 count; - acpi_status status; ACPI_FUNCTION_TRACE_PTR(ex_convert_to_integer, obj_desc); @@ -123,12 +123,18 @@ acpi_ex_convert_to_integer(union acpi_operand_object *obj_desc, * hexadecimal as per the ACPI specification. The only exception (as * of ACPI 3.0) is that the to_integer() operator allows both decimal * and hexadecimal strings (hex prefixed with "0x"). + * + * Explicit conversion is used only by to_integer. + * All other string-to-integer conversions are implicit conversions. */ - status = acpi_ut_strtoul64(ACPI_CAST_PTR(char, pointer), - (acpi_gbl_integer_byte_width | - flags), &result); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); + if (implicit_conversion) { + result = + acpi_ut_implicit_strtoul64(ACPI_CAST_PTR + (char, pointer)); + } else { + result = + acpi_ut_explicit_strtoul64(ACPI_CAST_PTR + (char, pointer)); } break; @@ -631,7 +637,7 @@ acpi_ex_convert_to_target_type(acpi_object_type destination_type, */ status = acpi_ex_convert_to_integer(source_desc, result_desc, - ACPI_STRTOUL_BASE16); + ACPI_IMPLICIT_CONVERSION); break; case ACPI_TYPE_STRING: diff --git a/drivers/acpi/acpica/exmisc.c b/drivers/acpi/acpica/exmisc.c index 1e7649ce0a7b..dbad3ebd7df5 100644 --- a/drivers/acpi/acpica/exmisc.c +++ b/drivers/acpi/acpica/exmisc.c @@ -330,7 +330,7 @@ acpi_ex_do_logical_op(u16 opcode, case ACPI_TYPE_INTEGER: status = acpi_ex_convert_to_integer(operand1, &local_operand1, - ACPI_STRTOUL_BASE16); + ACPI_IMPLICIT_CONVERSION); break; case ACPI_TYPE_STRING: diff --git a/drivers/acpi/acpica/exresop.c b/drivers/acpi/acpica/exresop.c index c4852429e2ff..1c7c9962b0de 100644 --- a/drivers/acpi/acpica/exresop.c +++ b/drivers/acpi/acpica/exresop.c @@ -415,7 +415,7 @@ acpi_ex_resolve_operands(u16 opcode, * Known as "Implicit Source Operand Conversion" */ status = acpi_ex_convert_to_integer(obj_desc, stack_ptr, - ACPI_STRTOUL_BASE16); + ACPI_IMPLICIT_CONVERSION); if (ACPI_FAILURE(status)) { if (status == AE_TYPE) { ACPI_ERROR((AE_INFO, diff --git a/drivers/acpi/acpica/nsconvert.c b/drivers/acpi/acpica/nsconvert.c index e4a7da8a11f0..539d775bbc92 100644 --- a/drivers/acpi/acpica/nsconvert.c +++ b/drivers/acpi/acpica/nsconvert.c @@ -78,8 +78,8 @@ acpi_ns_convert_to_integer(union acpi_operand_object *original_object, /* String-to-Integer conversion */ - status = acpi_ut_strtoul64(original_object->string.pointer, - acpi_gbl_integer_byte_width, &value); + status = + acpi_ut_strtoul64(original_object->string.pointer, &value); if (ACPI_FAILURE(status)) { return (status); } diff --git a/drivers/acpi/acpica/utstrsuppt.c b/drivers/acpi/acpica/utstrsuppt.c new file mode 100644 index 000000000000..ca41f037fd9a --- /dev/null +++ b/drivers/acpi/acpica/utstrsuppt.c @@ -0,0 +1,417 @@ +/******************************************************************************* + * + * Module Name: utstrsuppt - string-to-integer conversion support functions + * + ******************************************************************************/ + +/* + * Copyright (C) 2000 - 2017, 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("utstrsuppt") + +/* Local prototypes */ +static acpi_status +acpi_ut_insert_digit(u64 *accumulated_value, u32 base, int ascii_digit); + +static acpi_status +acpi_ut_strtoul_multiply64(u64 multiplicand, u64 multiplier, u64 *out_product); + +static acpi_status +acpi_ut_strtoul_add64(u64 addend1, u64 addend2, u64 *out_sum); + +/******************************************************************************* + * + * FUNCTION: acpi_ut_convert_octal_string + * + * PARAMETERS: string - Null terminated input string + * return_value_ptr - Where the converted value is returned + * + * RETURN: Status and 64-bit converted integer + * + * DESCRIPTION: Performs a base 8 conversion of the input string to an + * integer value, either 32 or 64 bits. + * + * NOTE: Maximum 64-bit unsigned octal value is 01777777777777777777777 + * Maximum 32-bit unsigned octal value is 037777777777 + * + ******************************************************************************/ + +acpi_status acpi_ut_convert_octal_string(char *string, u64 *return_value_ptr) +{ + u64 accumulated_value = 0; + acpi_status status = AE_OK; + + /* Convert each ASCII byte in the input string */ + + while (*string) { + + /* Must be ASCII 0-7, otherwise terminate with no error */ + + if (!(ACPI_IS_OCTAL_DIGIT(*string))) { + break; + } + + /* Convert and insert this octal digit into the accumulator */ + + status = acpi_ut_insert_digit(&accumulated_value, 8, *string); + if (ACPI_FAILURE(status)) { + status = AE_OCTAL_OVERFLOW; + break; + } + + string++; + } + + /* Always return the value that has been accumulated */ + + *return_value_ptr = accumulated_value; + return (status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_convert_decimal_string + * + * PARAMETERS: string - Null terminated input string + * return_value_ptr - Where the converted value is returned + * + * RETURN: Status and 64-bit converted integer + * + * DESCRIPTION: Performs a base 10 conversion of the input string to an + * integer value, either 32 or 64 bits. + * + * NOTE: Maximum 64-bit unsigned decimal value is 18446744073709551615 + * Maximum 32-bit unsigned decimal value is 4294967295 + * + ******************************************************************************/ + +acpi_status acpi_ut_convert_decimal_string(char *string, u64 *return_value_ptr) +{ + u64 accumulated_value = 0; + acpi_status status = AE_OK; + + /* Convert each ASCII byte in the input string */ + + while (*string) { + + /* Must be ASCII 0-9, otherwise terminate with no error */ + + if (!isdigit(*string)) { + break; + } + + /* Convert and insert this decimal digit into the accumulator */ + + status = acpi_ut_insert_digit(&accumulated_value, 10, *string); + if (ACPI_FAILURE(status)) { + status = AE_DECIMAL_OVERFLOW; + break; + } + + string++; + } + + /* Always return the value that has been accumulated */ + + *return_value_ptr = accumulated_value; + return (status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_convert_hex_string + * + * PARAMETERS: string - Null terminated input string + * return_value_ptr - Where the converted value is returned + * + * RETURN: Status and 64-bit converted integer + * + * DESCRIPTION: Performs a base 16 conversion of the input string to an + * integer value, either 32 or 64 bits. + * + * NOTE: Maximum 64-bit unsigned hex value is 0xFFFFFFFFFFFFFFFF + * Maximum 32-bit unsigned hex value is 0xFFFFFFFF + * + ******************************************************************************/ + +acpi_status acpi_ut_convert_hex_string(char *string, u64 *return_value_ptr) +{ + u64 accumulated_value = 0; + acpi_status status = AE_OK; + + /* Convert each ASCII byte in the input string */ + + while (*string) { + + /* Must be ASCII A-F, a-f, or 0-9, otherwise terminate with no error */ + + if (!isxdigit(*string)) { + break; + } + + /* Convert and insert this hex digit into the accumulator */ + + status = acpi_ut_insert_digit(&accumulated_value, 16, *string); + if (ACPI_FAILURE(status)) { + status = AE_HEX_OVERFLOW; + break; + } + + string++; + } + + /* Always return the value that has been accumulated */ + + *return_value_ptr = accumulated_value; + return (status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_remove_leading_zeros + * + * PARAMETERS: string - Pointer to input ASCII string + * + * RETURN: Next character after the leading zeros. This behavior may be + * Used by the caller to detect end-of-string. + * + * DESCRIPTION: Remove all leading zeros in the input string. Return the + * next character after the final zero to check for the end + * of the string (NULL terminator). + * + ******************************************************************************/ + +char acpi_ut_remove_leading_zeros(char **string) +{ + /* Skip all leading zeros */ + + while (**string == ACPI_ASCII_ZERO) { + *string += 1; + } + + return (**string); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_detect_hex_prefix + * + * PARAMETERS: string - Pointer to input ASCII string + * + * RETURN: TRUE if a 0x prefix was found + * + * DESCRIPTION: Detect and remove a hex 0x prefix + * + ******************************************************************************/ + +u8 acpi_ut_detect_hex_prefix(char **string) +{ + + if ((**string == ACPI_ASCII_ZERO) && + (tolower((int)*(*string + 1)) == 'x')) { + *string += 2; /* Go past the leading 0x */ + return (TRUE); + } + + return (FALSE); /* Not a hex string */ +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_detect_octal_prefix + * + * PARAMETERS: string - Pointer to input ASCII string + * + * RETURN: True if an octal 0 prefix was found + * + * DESCRIPTION: Detect and remove an octal prefix (zero) + * + ******************************************************************************/ + +u8 acpi_ut_detect_octal_prefix(char **string) +{ + + if (**string == ACPI_ASCII_ZERO) { + *string += 1; /* Go past the leading 0 */ + return (TRUE); + } + + return (FALSE); /* Not an octal string */ +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_insert_digit + * + * PARAMETERS: accumulated_value - Current value of the integer value + * accumulator. The New value is + * returned here. + * base - Radix, either 8/10/16 supported + * ascii_digit - ASCII single digit to be inserted + * + * RETURN: Status and result of convert/insert operation. The only + * exception is numeric overflow of either the multiply or the + * add operations. + * + * DESCRIPTION: Generic conversion and insertion function for all bases: + * + * 1) Multiply the current accumulated converted value by the + * base in order to make room for the new character. + * + * 2) Add the current accumulated/converted value the new + * character (after the character has been converted to a binary + * value). + * + * Note: The only possible exception indicates an integer + * overflow (AE_NUMERIC_OVERFLOW) + * + ******************************************************************************/ + +static acpi_status +acpi_ut_insert_digit(u64 *accumulated_value, u32 base, int ascii_digit) +{ + acpi_status status; + u64 product; + + /* Make room in the accumulated value for the incoming digit */ + + status = acpi_ut_strtoul_multiply64(*accumulated_value, base, &product); + if (ACPI_FAILURE(status)) { + return (status); + } + + /* Add in the new digit, and store to the caller's accumulated value */ + + status = + acpi_ut_strtoul_add64(product, + acpi_ut_ascii_char_to_hex(ascii_digit), + accumulated_value); + if (ACPI_FAILURE(status)) { + return (status); + } + + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_strtoul_multiply64 + * + * PARAMETERS: multiplicand - Current accumulated converted integer + * multiplier - Base/Radix + * out_product - Where the product is returned + * + * RETURN: Status and 64-bit product + * + * DESCRIPTION: Multiply two 64-bit values, with checking for 64-bit overflow as + * well as 32-bit overflow if necessary (if the current global + * integer width is 32). + * + ******************************************************************************/ + +static acpi_status +acpi_ut_strtoul_multiply64(u64 multiplicand, u64 multiplier, u64 *out_product) +{ + u64 val; + + /* Exit if either operand is zero */ + + *out_product = 0; + if (!multiplicand || !multiplier) { + return (AE_OK); + } + + /* Check for 64-bit overflow before the actual multiplication */ + + acpi_ut_short_divide(ACPI_UINT64_MAX, (u32)multiplier, &val, NULL); + if (multiplicand > val) { + return (AE_NUMERIC_OVERFLOW); + } + + val = multiplicand * multiplier; + + /* Check for 32-bit overflow if necessary */ + + if ((acpi_gbl_integer_bit_width == 32) && (val > ACPI_UINT32_MAX)) { + return (AE_NUMERIC_OVERFLOW); + } + + *out_product = val; + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_strtoul_add64 + * + * PARAMETERS: addend1 - Current accumulated converted integer + * addend2 - New hex value/char + * out_sum - Where sum is returned (Accumulator) + * + * RETURN: Status and 64-bit sum + * + * DESCRIPTION: Add two 64-bit values, with checking for 64-bit overflow as + * well as 32-bit overflow if necessary (if the current global + * integer width is 32). + * + ******************************************************************************/ + +static acpi_status acpi_ut_strtoul_add64(u64 addend1, u64 addend2, u64 *out_sum) +{ + u64 sum; + + /* Check for 64-bit overflow before the actual addition */ + + if ((addend1 > 0) && (addend2 > (ACPI_UINT64_MAX - addend1))) { + return (AE_NUMERIC_OVERFLOW); + } + + sum = addend1 + addend2; + + /* Check for 32-bit overflow if necessary */ + + if ((acpi_gbl_integer_bit_width == 32) && (sum > ACPI_UINT32_MAX)) { + return (AE_NUMERIC_OVERFLOW); + } + + *out_sum = sum; + return (AE_OK); +} diff --git a/drivers/acpi/acpica/utstrtoul64.c b/drivers/acpi/acpica/utstrtoul64.c index 9633ee142855..e5a2df3f16e5 100644 --- a/drivers/acpi/acpica/utstrtoul64.c +++ b/drivers/acpi/acpica/utstrtoul64.c @@ -1,6 +1,7 @@ /******************************************************************************* * - * Module Name: utstrtoul64 - string to 64-bit integer support + * Module Name: utstrtoul64 - string-to-integer support for both 64-bit + * and 32-bit integers * ******************************************************************************/ @@ -44,152 +45,74 @@ #include <acpi/acpi.h> #include "accommon.h" -/******************************************************************************* - * - * The functions in this module satisfy the need for 64-bit string-to-integer - * conversions on both 32-bit and 64-bit platforms. - * - ******************************************************************************/ - #define _COMPONENT ACPI_UTILITIES ACPI_MODULE_NAME("utstrtoul64") -/* Local prototypes */ -static u64 acpi_ut_strtoul_base10(char *string, u32 flags); - -static u64 acpi_ut_strtoul_base16(char *string, u32 flags); - /******************************************************************************* * - * String conversion rules as written in the ACPI specification. The error - * conditions and behavior are different depending on the type of conversion. - * + * This module contains the external string to 64/32-bit unsigned integer + * conversion functions: * - * Implicit data type conversion: string-to-integer - * -------------------------------------------------- - * - * Base is always 16. This is the ACPI_STRTOUL_BASE16 case. - * - * Example: - * Add ("BA98", Arg0, Local0) - * - * The integer is initialized to the value zero. - * The ASCII string is interpreted as a hexadecimal constant. - * - * 1) A "0x" prefix is not allowed. However, ACPICA allows this for - * compatibility with previous ACPICA. (NO ERROR) - * - * 2) Terminates when the size of an integer is reached (32 or 64 bits). - * (NO ERROR) + * 1) Standard strtoul() function with 64-bit support. This is mostly used by + * the iASL compiler. + * 2) Runtime "Explicit conversion" as defined in the ACPI specification. + * 3) Runtime "Implicit conversion" as defined in the ACPI specification. * - * 3) The first non-hex character terminates the conversion without error. - * (NO ERROR) + * Current users of this module: * - * 4) Conversion of a null (zero-length) string to an integer is not - * allowed. However, ACPICA allows this for compatibility with previous - * ACPICA. This conversion returns the value 0. (NO ERROR) - * - * - * Explicit data type conversion: to_integer() with string operand - * --------------------------------------------------------------- - * - * Base is either 10 (default) or 16 (with 0x prefix) - * - * Examples: - * to_integer ("1000") - * to_integer ("0xABCD") - * - * 1) Can be (must be) either a decimal or hexadecimal numeric string. - * A hex value must be prefixed by "0x" or it is interpreted as a decimal. + * interpreter - Implicit and explicit conversions, GPE method names + * debugger - Command line input string conversion + * iASL - Main parser, conversion of constants to integers + * iASL - Data Table Compiler parser (constant math expressions) + * iASL - Preprocessor (constant math expressions) + * acpi_dump - Input table addresses + * acpi_exec - Testing of the acpi_ut_strtoul64 function * - * 2) The value must not exceed the maximum of an integer value. ACPI spec - * states the behavior is "unpredictable", so ACPICA matches the behavior - * of the implicit conversion case.(NO ERROR) + * Notes concerning users of these interfaces: * - * 3) Behavior on the first non-hex character is not specified by the ACPI - * spec, so ACPICA matches the behavior of the implicit conversion case - * and terminates. (NO ERROR) + * acpi_gbl_integer_byte_width is used to set the 32/64 bit limit. This global + * must be set to the proper width. For the core ACPICA code, the width + * depends on the DSDT version. For iASL, the default width is 64 bits for + * all parsers, but error checking is performed later to flag cases where + * a 64-bit constant is wrongly defined in a 32-bit DSDT/SSDT. * - * 4) A null (zero-length) string is illegal. - * However, ACPICA allows this for compatibility with previous ACPICA. - * This conversion returns the value 0. (NO ERROR) + * In ACPI, the only place where octal numbers are supported is within + * the ASL language itself. There is no runtime support for octal. * ******************************************************************************/ - /******************************************************************************* * * FUNCTION: acpi_ut_strtoul64 * - * PARAMETERS: string - Null terminated input string - * flags - Conversion info, see below + * PARAMETERS: string - Null terminated input string. + * Must be a valid pointer * return_value - 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 in Flags (often the current mode of the interpreter). - * - * Values for Flags: - * ACPI_STRTOUL_32BIT - Max integer value is 32 bits - * ACPI_STRTOUL_64BIT - Max integer value is 64 bits - * ACPI_STRTOUL_BASE16 - Input string is hexadecimal. Default - * is 10/16 based on string prefix (0x). + * returned. Must be a valid pointer * - * NOTES: - * Negative numbers are not supported, as they are not supported by ACPI. + * RETURN: Status and converted integer + * Returns an exception on numeric overflow * - * Supports only base 16 or base 10 strings/values. Does not - * support Octal strings, as these are not supported by ACPI. + * DESCRIPTION: Convert a string into an unsigned integer. Performs either a + * 32-bit or 64-bit conversion, depending on the current global + * integer width. Supports Decimal, Hex, and Octal strings. * - * Current users of this support: + * Current users of this function: * - * interpreter - Implicit and explicit conversions, GPE method names - * debugger - Command line input string conversion - * iASL - Main parser, conversion of constants to integers - * iASL - Data Table Compiler parser (constant math expressions) * iASL - Preprocessor (constant math expressions) - * acpi_dump - Input table addresses - * acpi_exec - Testing of the acpi_ut_strtoul64 function - * - * Note concerning callers: - * acpi_gbl_integer_byte_width can be used to set the 32/64 limit. If used, - * this global 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. + * iASL - Main parser, conversion of ASL constants to integers + * iASL - Data Table Compiler parser (constant math expressions) * ******************************************************************************/ - -acpi_status acpi_ut_strtoul64(char *string, u32 flags, u64 *return_value) +acpi_status acpi_ut_strtoul64(char *string, u64 *return_value) { acpi_status status = AE_OK; - u32 base; + u32 base = 10; /* Default is decimal */ ACPI_FUNCTION_TRACE_STR(ut_strtoul64, string); - /* Parameter validation */ - - if (!string || !return_value) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - *return_value = 0; - /* Check for zero-length string, returns 0 */ - - if (*string == 0) { - return_ACPI_STATUS(AE_OK); - } - - /* Skip over any white space at start of string */ - - while (isspace((int)*string)) { - string++; - } - - /* End of string? return 0 */ + /* Null return string returns a value of zero */ if (*string == 0) { return_ACPI_STATUS(AE_OK); @@ -198,45 +121,45 @@ acpi_status acpi_ut_strtoul64(char *string, u32 flags, u64 *return_value) /* * 1) The "0x" prefix indicates base 16. Per the ACPI specification, * the "0x" prefix is only allowed for implicit (non-strict) conversions. - * However, we always allow it for compatibility with older ACPICA. + * However, we always allow it for compatibility with older ACPICA and + * just plain on principle. */ - if ((*string == ACPI_ASCII_ZERO) && - (tolower((int)*(string + 1)) == 'x')) { - string += 2; /* Go past the 0x */ - if (*string == 0) { - return_ACPI_STATUS(AE_OK); /* Return value 0 */ - } - - base = 16; - } - - /* 2) Force to base 16 (implicit conversion case) */ - - else if (flags & ACPI_STRTOUL_BASE16) { + if (acpi_ut_detect_hex_prefix(&string)) { base = 16; } - /* 3) Default fallback is to Base 10 */ - - else { - base = 10; + /* + * 2) Check for an octal constant, defined to be a leading zero + * followed by an valid octal digit (0-7) + */ + else if (acpi_ut_detect_octal_prefix(&string)) { + base = 8; } - /* Skip all leading zeros */ - - while (*string == ACPI_ASCII_ZERO) { - string++; - if (*string == 0) { - return_ACPI_STATUS(AE_OK); /* Return value 0 */ - } + if (!acpi_ut_remove_leading_zeros(&string)) { + return_ACPI_STATUS(AE_OK); /* Return value 0 */ } - /* Perform the base 16 or 10 conversion */ - - if (base == 16) { - *return_value = acpi_ut_strtoul_base16(string, flags); - } else { - *return_value = acpi_ut_strtoul_base10(string, flags); + /* + * Perform the base 8, 10, or 16 conversion. A numeric overflow will + * return an exception. + */ + switch (base) { + case 8: + status = acpi_ut_convert_octal_string(string, return_value); + break; + + case 10: + status = acpi_ut_convert_decimal_string(string, return_value); + break; + + case 16: + status = acpi_ut_convert_hex_string(string, return_value); + break; + + default: + status = AE_AML_INTERNAL; /* Should never happen */ + break; } return_ACPI_STATUS(status); @@ -244,104 +167,167 @@ acpi_status acpi_ut_strtoul64(char *string, u32 flags, u64 *return_value) /******************************************************************************* * - * FUNCTION: acpi_ut_strtoul_base10 + * FUNCTION: acpi_ut_implicit_strtoul64 + * + * PARAMETERS: string - Null terminated input string. + * Must be a valid pointer * - * PARAMETERS: string - Null terminated input string - * flags - Conversion info + * RETURN: Converted integer * - * RETURN: 64-bit converted integer + * DESCRIPTION: Perform a 64-bit conversion with restrictions placed upon + * an "implicit conversion" by the ACPI specification. Used by + * many ASL operators that require an integer operand, and support + * an automatic (implicit) conversion from a string operand + * to the final integer operand. The restriction is that only + * hex strings are supported. * - * DESCRIPTION: Performs a base 10 conversion of the input string to an - * integer value, either 32 or 64 bits. - * Note: String must be valid and non-null. + * ----------------------------------------------------------------------------- + * + * Base is always 16, either with or without the 0x prefix. + * + * Examples (both are hex values): + * Add ("BA98", Arg0, Local0) + * Subtract ("0x12345678", Arg1, Local1) + * + * Rules extracted from the ACPI specification: + * + * The converted integer is initialized to the value zero. + * The ASCII string is interpreted as a hexadecimal constant. + * + * 1) A "0x" prefix is not allowed. However, ACPICA allows this as an + * ACPI extension on general principle. (NO ERROR) + * + * 2) Terminates when the size of an integer is reached (32 or 64 bits). + * There are no numeric overflow conditions. (NO ERROR) + * + * 3) The first non-hex character terminates the conversion and returns + * the current accumulated value of the converted integer (NO ERROR). + * + * 4) Conversion of a null (zero-length) string to an integer is + * technically allowed. However, ACPICA allows as an ACPI extension. + * The conversion returns the value 0. (NO ERROR) + * + * Note: there are no error conditions returned by this function. At + * the minimum, a value of zero is returned. + * + * Current users of this function: + * + * interpreter - All runtime implicit conversions, as per ACPI specification + * iASL - Data Table Compiler parser (constant math expressions) * ******************************************************************************/ -static u64 acpi_ut_strtoul_base10(char *string, u32 flags) +u64 acpi_ut_implicit_strtoul64(char *string) { - int ascii_digit; - u64 next_value; - u64 return_value = 0; + u64 converted_integer = 0; - /* Main loop: convert each ASCII byte in the input string */ + ACPI_FUNCTION_TRACE_STR(ut_implicit_strtoul64, string); - while (*string) { - ascii_digit = *string; - if (!isdigit(ascii_digit)) { - - /* Not ASCII 0-9, terminate */ - - goto exit; - } - - /* Convert and insert (add) the decimal digit */ - - acpi_ut_short_multiply(return_value, 10, &next_value); - next_value += (ascii_digit - ACPI_ASCII_ZERO); - - /* Check for overflow (32 or 64 bit) - return current converted value */ - - if (((flags & ACPI_STRTOUL_32BIT) && (next_value > ACPI_UINT32_MAX)) || (next_value < return_value)) { /* 64-bit overflow case */ - goto exit; - } + /* + * Per the ACPI specification, only hexadecimal is supported for + * implicit conversions, and the "0x" prefix is "not allowed". + * However, allow a "0x" prefix as an ACPI extension. + */ + acpi_ut_detect_hex_prefix(&string); - return_value = next_value; - string++; + if (!acpi_ut_remove_leading_zeros(&string)) { + return_VALUE(0); } -exit: - return (return_value); + /* + * Ignore overflow as per the ACPI specification. This is implemented by + * ignoring the return status below. On overflow, the input string is + * simply truncated. + */ + acpi_ut_convert_hex_string(string, &converted_integer); + return_VALUE(converted_integer); } /******************************************************************************* * - * FUNCTION: acpi_ut_strtoul_base16 + * FUNCTION: acpi_ut_explicit_strtoul64 + * + * PARAMETERS: string - Null terminated input string. + * Must be a valid pointer + * + * RETURN: Converted integer + * + * DESCRIPTION: Perform a 64-bit conversion with the restrictions placed upon + * an "explicit conversion" by the ACPI specification. The + * main restriction is that only hex and decimal are supported. + * + * ----------------------------------------------------------------------------- + * + * Base is either 10 (default) or 16 (with 0x prefix). There is no octal + * (base 8), as per the ACPI specification. + * + * Examples: + * to_integer ("1000") Decimal + * to_integer ("0xABCD") Hex + * + * Rules extracted from the ACPI specification: + * + * 1) Thi input string is either a decimal or hexadecimal numeric string. + * A hex value must be prefixed by "0x" or it is interpreted as decimal. + * + * 2) The value must not exceed the maximum of an integer value + * (32 or 64 bits). The ACPI specification states the behavior is + * "unpredictable", so ACPICA matches the behavior of the implicit + * conversion case. There are no numeric overflow conditions. (NO ERROR) + * + * 3) Behavior on the first non-hex character is not specified by the ACPI + * specification (for the to_integer operator), so ACPICA matches the + * behavior of the implicit conversion case. It terminates the + * conversion and returns the current accumulated value of the converted + * integer. (NO ERROR) * - * PARAMETERS: string - Null terminated input string - * flags - conversion info + * 4) Conversion of a null (zero-length) string to an integer is + * technically allowed. However, ACPICA allows as an ACPI extension. + * The conversion returns the value 0. (NO ERROR) * - * RETURN: 64-bit converted integer + * Note: there are no error conditions returned by this function. At + * the minimum, a value of zero is returned. * - * DESCRIPTION: Performs a base 16 conversion of the input string to an - * integer value, either 32 or 64 bits. - * Note: String must be valid and non-null. + * Current users of this function: + * + * interpreter - Runtime ASL to_integer operator, as per the ACPI specification * ******************************************************************************/ -static u64 acpi_ut_strtoul_base16(char *string, u32 flags) +u64 acpi_ut_explicit_strtoul64(char *string) { - int ascii_digit; - u32 valid_digits = 1; - u64 return_value = 0; - - /* Main loop: convert each ASCII byte in the input string */ - - while (*string) { - - /* Check for overflow (32 or 64 bit) - return current converted value */ - - if ((valid_digits > 16) || - ((valid_digits > 8) && (flags & ACPI_STRTOUL_32BIT))) { - goto exit; - } - - ascii_digit = *string; - if (!isxdigit(ascii_digit)) { - - /* Not Hex ASCII A-F, a-f, or 0-9, terminate */ + u64 converted_integer = 0; + u32 base = 10; /* Default is decimal */ - goto exit; - } + ACPI_FUNCTION_TRACE_STR(ut_explicit_strtoul64, string); - /* Convert and insert the hex digit */ + /* + * Only Hex and Decimal are supported, as per the ACPI specification. + * 0x prefix means hex; otherwise decimal is assumed. + */ + if (acpi_ut_detect_hex_prefix(&string)) { + base = 16; + } - acpi_ut_short_shift_left(return_value, 4, &return_value); - return_value |= acpi_ut_ascii_char_to_hex(ascii_digit); + if (!acpi_ut_remove_leading_zeros(&string)) { + return_VALUE(0); + } - string++; - valid_digits++; + /* + * Ignore overflow as per the ACPI specification. This is implemented by + * ignoring the return status below. On overflow, the input string is + * simply truncated. + */ + switch (base) { + case 10: + default: + acpi_ut_convert_decimal_string(string, &converted_integer); + break; + + case 16: + acpi_ut_convert_hex_string(string, &converted_integer); + break; } -exit: - return (return_value); + return_VALUE(converted_integer); } |