diff options
Diffstat (limited to 'drivers/acpi/acpica/utnonansi.c')
| -rw-r--r-- | drivers/acpi/acpica/utnonansi.c | 67 |
1 files changed, 37 insertions, 30 deletions
diff --git a/drivers/acpi/acpica/utnonansi.c b/drivers/acpi/acpica/utnonansi.c index d5c3adf19bd0..3465fe2c5a5c 100644 --- a/drivers/acpi/acpica/utnonansi.c +++ b/drivers/acpi/acpica/utnonansi.c @@ -205,37 +205,41 @@ acpi_ut_safe_strncat(char *dest, * * 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 + * 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 current mode - * of the interpreter. + * 32-bit or 64-bit conversion, depending on the input integer + * size (often the current mode of the interpreter). * - * NOTES: acpi_gbl_integer_byte_width should be set to the proper width. + * 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. + * 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. * - * 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) +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; - 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; @@ -244,6 +248,7 @@ acpi_status acpi_ut_strtoul64(char *string, u32 base, u64 *ret_integer) switch (base) { case ACPI_ANY_BASE: + case 10: case 16: break; @@ -265,9 +270,9 @@ acpi_status acpi_ut_strtoul64(char *string, u32 base, u64 *ret_integer) string++; } - if (to_integer_op) { + if (base == ACPI_ANY_BASE) { /* - * Base equal to ACPI_ANY_BASE means 'ToInteger operation case'. + * 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')) { @@ -284,7 +289,7 @@ acpi_status acpi_ut_strtoul64(char *string, u32 base, u64 *ret_integer) /* Any string left? Check that '0x' is not followed by white space. */ if (!(*string) || isspace((int)*string) || *string == '\t') { - if (to_integer_op) { + if (base == ACPI_ANY_BASE) { goto error_exit; } else { goto all_done; @@ -292,10 +297,11 @@ acpi_status acpi_ut_strtoul64(char *string, u32 base, u64 *ret_integer) } /* - * Perform a 32-bit or 64-bit conversion, depending upon the current - * execution mode of the interpreter + * Perform a 32-bit or 64-bit conversion, depending upon the input + * byte width */ - dividend = (mode32) ? ACPI_UINT32_MAX : ACPI_UINT64_MAX; + 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 */ @@ -323,7 +329,7 @@ acpi_status acpi_ut_strtoul64(char *string, u32 base, u64 *ret_integer) } if (term) { - if (to_integer_op) { + if (base == ACPI_ANY_BASE) { goto error_exit; } else { break; @@ -338,12 +344,13 @@ acpi_status acpi_ut_strtoul64(char *string, u32 base, u64 *ret_integer) valid_digits++; - if (sign_of0x - && ((valid_digits > 16) - || ((valid_digits > 8) && mode32))) { + if (sign_of0x && ((valid_digits > 16) || + ((valid_digits > 8) + && (max_integer_byte_width <= + ACPI_MAX32_BYTE_WIDTH)))) { /* * This is to_integer operation case. - * No any restrictions for string-to-integer conversion, + * No restrictions for string-to-integer conversion, * see ACPI spec. */ goto error_exit; @@ -355,7 +362,7 @@ acpi_status acpi_ut_strtoul64(char *string, u32 base, u64 *ret_integer) "ient, NULL); if (return_value > quotient) { - if (to_integer_op) { + if (base == ACPI_ANY_BASE) { goto error_exit; } else { break; @@ -378,7 +385,8 @@ all_done: return_ACPI_STATUS(AE_OK); error_exit: - /* Base was set/validated above */ + + /* Base was set/validated above (10 or 16) */ if (base == 10) { return_ACPI_STATUS(AE_BAD_DECIMAL_CONSTANT); @@ -388,8 +396,7 @@ error_exit: } #ifdef _OBSOLETE_FUNCTIONS -/* TBD: use version in ACPICA main code base? */ -/* DONE: 01/2016 */ +/* Removed: 01/2016 */ /******************************************************************************* * |