diff options
Diffstat (limited to 'drivers/acpi/acpica/utclib.c')
-rw-r--r-- | drivers/acpi/acpica/utclib.c | 749 |
1 files changed, 749 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/utclib.c b/drivers/acpi/acpica/utclib.c new file mode 100644 index 0000000..19ea4755 --- /dev/null +++ b/drivers/acpi/acpica/utclib.c @@ -0,0 +1,749 @@ +/****************************************************************************** + * + * Module Name: cmclib - Local implementation of C library functions + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2012, 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" + +/* + * These implementations of standard C Library routines can optionally be + * used if a C library is not available. In general, they are less efficient + * than an inline or assembly implementation + */ + +#define _COMPONENT ACPI_UTILITIES +ACPI_MODULE_NAME("cmclib") + +#ifndef ACPI_USE_SYSTEM_CLIBRARY +#define NEGATIVE 1 +#define POSITIVE 0 +/******************************************************************************* + * + * FUNCTION: acpi_ut_memcmp (memcmp) + * + * PARAMETERS: buffer1 - First Buffer + * buffer2 - Second Buffer + * count - Maximum # of bytes to compare + * + * RETURN: Index where Buffers mismatched, or 0 if Buffers matched + * + * DESCRIPTION: Compare two Buffers, with a maximum length + * + ******************************************************************************/ +int acpi_ut_memcmp(const char *buffer1, const char *buffer2, acpi_size count) +{ + + return ((count == ACPI_SIZE_MAX) ? 0 : ((unsigned char)*buffer1 - + (unsigned char)*buffer2)); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_memcpy (memcpy) + * + * PARAMETERS: dest - Target of the copy + * src - Source buffer to copy + * count - Number of bytes to copy + * + * RETURN: Dest + * + * DESCRIPTION: Copy arbitrary bytes of memory + * + ******************************************************************************/ + +void *acpi_ut_memcpy(void *dest, const void *src, acpi_size count) +{ + char *new = (char *)dest; + char *old = (char *)src; + + while (count) { + *new = *old; + new++; + old++; + count--; + } + + return (dest); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_memset (memset) + * + * PARAMETERS: dest - Buffer to set + * value - Value to set each byte of memory + * count - Number of bytes to set + * + * RETURN: Dest + * + * DESCRIPTION: Initialize a buffer to a known value. + * + ******************************************************************************/ + +void *acpi_ut_memset(void *dest, u8 value, acpi_size count) +{ + char *new = (char *)dest; + + while (count) { + *new = (char)value; + new++; + count--; + } + + return (dest); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_strlen (strlen) + * + * PARAMETERS: string - Null terminated string + * + * RETURN: Length + * + * DESCRIPTION: Returns the length of the input string + * + ******************************************************************************/ + +acpi_size acpi_ut_strlen(const char *string) +{ + u32 length = 0; + + /* Count the string until a null is encountered */ + + while (*string) { + length++; + string++; + } + + return (length); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_strcpy (strcpy) + * + * PARAMETERS: dst_string - Target of the copy + * src_string - The source string to copy + * + * RETURN: dst_string + * + * DESCRIPTION: Copy a null terminated string + * + ******************************************************************************/ + +char *acpi_ut_strcpy(char *dst_string, const char *src_string) +{ + char *string = dst_string; + + /* Move bytes brute force */ + + while (*src_string) { + *string = *src_string; + + string++; + src_string++; + } + + /* Null terminate */ + + *string = 0; + return (dst_string); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_strncpy (strncpy) + * + * PARAMETERS: dst_string - Target of the copy + * src_string - The source string to copy + * count - Maximum # of bytes to copy + * + * RETURN: dst_string + * + * DESCRIPTION: Copy a null terminated string, with a maximum length + * + ******************************************************************************/ + +char *acpi_ut_strncpy(char *dst_string, const char *src_string, acpi_size count) +{ + char *string = dst_string; + + /* Copy the string */ + + for (string = dst_string; + count && (count--, (*string++ = *src_string++));) {; + } + + /* Pad with nulls if necessary */ + + while (count--) { + *string = 0; + string++; + } + + /* Return original pointer */ + + return (dst_string); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_strcmp (strcmp) + * + * PARAMETERS: string1 - First string + * string2 - Second string + * + * RETURN: Index where strings mismatched, or 0 if strings matched + * + * DESCRIPTION: Compare two null terminated strings + * + ******************************************************************************/ + +int acpi_ut_strcmp(const char *string1, const char *string2) +{ + + for (; (*string1 == *string2); string2++) { + if (!*string1++) { + return (0); + } + } + + return ((unsigned char)*string1 - (unsigned char)*string2); +} + +#ifdef ACPI_FUTURE_IMPLEMENTATION +/* Not used at this time */ +/******************************************************************************* + * + * FUNCTION: acpi_ut_strchr (strchr) + * + * PARAMETERS: string - Search string + * ch - character to search for + * + * RETURN: Ptr to char or NULL if not found + * + * DESCRIPTION: Search a string for a character + * + ******************************************************************************/ + +char *acpi_ut_strchr(const char *string, int ch) +{ + + for (; (*string); string++) { + if ((*string) == (char)ch) { + return ((char *)string); + } + } + + return (NULL); +} +#endif + +/******************************************************************************* + * + * FUNCTION: acpi_ut_strncmp (strncmp) + * + * PARAMETERS: string1 - First string + * string2 - Second string + * count - Maximum # of bytes to compare + * + * RETURN: Index where strings mismatched, or 0 if strings matched + * + * DESCRIPTION: Compare two null terminated strings, with a maximum length + * + ******************************************************************************/ + +int acpi_ut_strncmp(const char *string1, const char *string2, acpi_size count) +{ + + for (; count-- && (*string1 == *string2); string2++) { + if (!*string1++) { + return (0); + } + } + + return ((count == ACPI_SIZE_MAX) ? 0 : ((unsigned char)*string1 - + (unsigned char)*string2)); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_strcat (Strcat) + * + * PARAMETERS: dst_string - Target of the copy + * src_string - The source string to copy + * + * RETURN: dst_string + * + * DESCRIPTION: Append a null terminated string to a null terminated string + * + ******************************************************************************/ + +char *acpi_ut_strcat(char *dst_string, const char *src_string) +{ + char *string; + + /* Find end of the destination string */ + + for (string = dst_string; *string++;) {; + } + + /* Concatenate the string */ + + for (--string; (*string++ = *src_string++);) {; + } + + return (dst_string); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_strncat (strncat) + * + * PARAMETERS: dst_string - Target of the copy + * src_string - The source string to copy + * count - Maximum # of bytes to copy + * + * RETURN: dst_string + * + * DESCRIPTION: Append a null terminated string to a null terminated string, + * with a maximum count. + * + ******************************************************************************/ + +char *acpi_ut_strncat(char *dst_string, const char *src_string, acpi_size count) +{ + char *string; + + if (count) { + + /* Find end of the destination string */ + + for (string = dst_string; *string++;) {; + } + + /* Concatenate the string */ + + for (--string; (*string++ = *src_string++) && --count;) {; + } + + /* Null terminate if necessary */ + + if (!count) { + *string = 0; + } + } + + return (dst_string); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_strstr (strstr) + * + * PARAMETERS: string1 - Target string + * string2 - Substring to search for + * + * RETURN: Where substring match starts, Null if no match found + * + * DESCRIPTION: Checks if String2 occurs in String1. This is not really a + * full implementation of strstr, only sufficient for command + * matching + * + ******************************************************************************/ + +char *acpi_ut_strstr(char *string1, char *string2) +{ + char *string; + + if (acpi_ut_strlen(string2) > acpi_ut_strlen(string1)) { + return (NULL); + } + + /* Walk entire string, comparing the letters */ + + for (string = string1; *string2;) { + if (*string2 != *string) { + return (NULL); + } + + string2++; + string++; + } + + return (string1); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_strtoul (strtoul) + * + * 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 a 32-bit unsigned value. + * Note: use acpi_ut_strtoul64 for 64-bit integers. + * + ******************************************************************************/ + +u32 acpi_ut_strtoul(const char *string, char **terminator, u32 base) +{ + u32 converted = 0; + u32 index; + u32 sign; + const char *string_start; + u32 return_value = 0; + acpi_status status = AE_OK; + + /* + * Save the value of the pointer to the buffer's first + * character, save the current errno value, and then + * skip over any white space in the buffer: + */ + string_start = string; + while (ACPI_IS_SPACE(*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 = NEGATIVE; + ++string; + } else if (*string == '+') { + ++string; + sign = POSITIVE; + } else { + 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 (acpi_ut_to_lower(*(++string)) == 'x') { + base = 16; + ++string; + } else { + base = 8; + } + } else { + base = 10; + } + } else if (base < 2 || base > 36) { + /* + * The specified Base parameter is not in the domain of + * this function: + */ + goto done; + } + + /* + * 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' && acpi_ut_to_lower(*(++string)) == 'x') { + string++; + } + + /* + * Main loop: convert the string to an unsigned long: + */ + while (*string) { + if (ACPI_IS_DIGIT(*string)) { + index = (u32)((u8)*string - '0'); + } else { + index = (u32)acpi_ut_to_upper(*string); + if (ACPI_IS_UPPER(index)) { + index = index - 'A' + 10; + } else { + goto done; + } + } + + if (index >= base) { + goto done; + } + + /* + * Check to see if value is out of range: + */ + + if (return_value > ((ACPI_UINT32_MAX - (u32)index) / (u32)base)) { + status = AE_ERROR; + return_value = 0; /* reset */ + } else { + return_value *= base; + return_value += index; + converted = 1; + } + + ++string; + } + + done: + /* + * If appropriate, update the caller's pointer to the next + * unconverted character in the buffer. + */ + if (terminator) { + if (converted == 0 && return_value == 0 && string != NULL) { + *terminator = (char *)string_start; + } else { + *terminator = (char *)string; + } + } + + if (status == AE_ERROR) { + return_value = ACPI_UINT32_MAX; + } + + /* + * If a minus sign was present, then "the conversion is negated": + */ + if (sign == NEGATIVE) { + return_value = (ACPI_UINT32_MAX - return_value) + 1; + } + + return (return_value); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_to_upper (TOUPPER) + * + * PARAMETERS: c - Character to convert + * + * RETURN: Converted character as an int + * + * DESCRIPTION: Convert character to uppercase + * + ******************************************************************************/ + +int acpi_ut_to_upper(int c) +{ + + return (ACPI_IS_LOWER(c) ? ((c) - 0x20) : (c)); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_to_lower (TOLOWER) + * + * PARAMETERS: c - Character to convert + * + * RETURN: Converted character as an int + * + * DESCRIPTION: Convert character to lowercase + * + ******************************************************************************/ + +int acpi_ut_to_lower(int c) +{ + + return (ACPI_IS_UPPER(c) ? ((c) + 0x20) : (c)); +} + +/******************************************************************************* + * + * FUNCTION: is* functions + * + * DESCRIPTION: is* functions use the ctype table below + * + ******************************************************************************/ + +const u8 _acpi_ctype[257] = { + _ACPI_CN, /* 0x00 0 NUL */ + _ACPI_CN, /* 0x01 1 SOH */ + _ACPI_CN, /* 0x02 2 STX */ + _ACPI_CN, /* 0x03 3 ETX */ + _ACPI_CN, /* 0x04 4 EOT */ + _ACPI_CN, /* 0x05 5 ENQ */ + _ACPI_CN, /* 0x06 6 ACK */ + _ACPI_CN, /* 0x07 7 BEL */ + _ACPI_CN, /* 0x08 8 BS */ + _ACPI_CN | _ACPI_SP, /* 0x09 9 TAB */ + _ACPI_CN | _ACPI_SP, /* 0x0A 10 LF */ + _ACPI_CN | _ACPI_SP, /* 0x0B 11 VT */ + _ACPI_CN | _ACPI_SP, /* 0x0C 12 FF */ + _ACPI_CN | _ACPI_SP, /* 0x0D 13 CR */ + _ACPI_CN, /* 0x0E 14 SO */ + _ACPI_CN, /* 0x0F 15 SI */ + _ACPI_CN, /* 0x10 16 DLE */ + _ACPI_CN, /* 0x11 17 DC1 */ + _ACPI_CN, /* 0x12 18 DC2 */ + _ACPI_CN, /* 0x13 19 DC3 */ + _ACPI_CN, /* 0x14 20 DC4 */ + _ACPI_CN, /* 0x15 21 NAK */ + _ACPI_CN, /* 0x16 22 SYN */ + _ACPI_CN, /* 0x17 23 ETB */ + _ACPI_CN, /* 0x18 24 CAN */ + _ACPI_CN, /* 0x19 25 EM */ + _ACPI_CN, /* 0x1A 26 SUB */ + _ACPI_CN, /* 0x1B 27 ESC */ + _ACPI_CN, /* 0x1C 28 FS */ + _ACPI_CN, /* 0x1D 29 GS */ + _ACPI_CN, /* 0x1E 30 RS */ + _ACPI_CN, /* 0x1F 31 US */ + _ACPI_XS | _ACPI_SP, /* 0x20 32 ' ' */ + _ACPI_PU, /* 0x21 33 '!' */ + _ACPI_PU, /* 0x22 34 '"' */ + _ACPI_PU, /* 0x23 35 '#' */ + _ACPI_PU, /* 0x24 36 '$' */ + _ACPI_PU, /* 0x25 37 '%' */ + _ACPI_PU, /* 0x26 38 '&' */ + _ACPI_PU, /* 0x27 39 ''' */ + _ACPI_PU, /* 0x28 40 '(' */ + _ACPI_PU, /* 0x29 41 ')' */ + _ACPI_PU, /* 0x2A 42 '*' */ + _ACPI_PU, /* 0x2B 43 '+' */ + _ACPI_PU, /* 0x2C 44 ',' */ + _ACPI_PU, /* 0x2D 45 '-' */ + _ACPI_PU, /* 0x2E 46 '.' */ + _ACPI_PU, /* 0x2F 47 '/' */ + _ACPI_XD | _ACPI_DI, /* 0x30 48 '0' */ + _ACPI_XD | _ACPI_DI, /* 0x31 49 '1' */ + _ACPI_XD | _ACPI_DI, /* 0x32 50 '2' */ + _ACPI_XD | _ACPI_DI, /* 0x33 51 '3' */ + _ACPI_XD | _ACPI_DI, /* 0x34 52 '4' */ + _ACPI_XD | _ACPI_DI, /* 0x35 53 '5' */ + _ACPI_XD | _ACPI_DI, /* 0x36 54 '6' */ + _ACPI_XD | _ACPI_DI, /* 0x37 55 '7' */ + _ACPI_XD | _ACPI_DI, /* 0x38 56 '8' */ + _ACPI_XD | _ACPI_DI, /* 0x39 57 '9' */ + _ACPI_PU, /* 0x3A 58 ':' */ + _ACPI_PU, /* 0x3B 59 ';' */ + _ACPI_PU, /* 0x3C 60 '<' */ + _ACPI_PU, /* 0x3D 61 '=' */ + _ACPI_PU, /* 0x3E 62 '>' */ + _ACPI_PU, /* 0x3F 63 '?' */ + _ACPI_PU, /* 0x40 64 '@' */ + _ACPI_XD | _ACPI_UP, /* 0x41 65 'A' */ + _ACPI_XD | _ACPI_UP, /* 0x42 66 'B' */ + _ACPI_XD | _ACPI_UP, /* 0x43 67 'C' */ + _ACPI_XD | _ACPI_UP, /* 0x44 68 'D' */ + _ACPI_XD | _ACPI_UP, /* 0x45 69 'E' */ + _ACPI_XD | _ACPI_UP, /* 0x46 70 'F' */ + _ACPI_UP, /* 0x47 71 'G' */ + _ACPI_UP, /* 0x48 72 'H' */ + _ACPI_UP, /* 0x49 73 'I' */ + _ACPI_UP, /* 0x4A 74 'J' */ + _ACPI_UP, /* 0x4B 75 'K' */ + _ACPI_UP, /* 0x4C 76 'L' */ + _ACPI_UP, /* 0x4D 77 'M' */ + _ACPI_UP, /* 0x4E 78 'N' */ + _ACPI_UP, /* 0x4F 79 'O' */ + _ACPI_UP, /* 0x50 80 'P' */ + _ACPI_UP, /* 0x51 81 'Q' */ + _ACPI_UP, /* 0x52 82 'R' */ + _ACPI_UP, /* 0x53 83 'S' */ + _ACPI_UP, /* 0x54 84 'T' */ + _ACPI_UP, /* 0x55 85 'U' */ + _ACPI_UP, /* 0x56 86 'V' */ + _ACPI_UP, /* 0x57 87 'W' */ + _ACPI_UP, /* 0x58 88 'X' */ + _ACPI_UP, /* 0x59 89 'Y' */ + _ACPI_UP, /* 0x5A 90 'Z' */ + _ACPI_PU, /* 0x5B 91 '[' */ + _ACPI_PU, /* 0x5C 92 '\' */ + _ACPI_PU, /* 0x5D 93 ']' */ + _ACPI_PU, /* 0x5E 94 '^' */ + _ACPI_PU, /* 0x5F 95 '_' */ + _ACPI_PU, /* 0x60 96 '`' */ + _ACPI_XD | _ACPI_LO, /* 0x61 97 'a' */ + _ACPI_XD | _ACPI_LO, /* 0x62 98 'b' */ + _ACPI_XD | _ACPI_LO, /* 0x63 99 'c' */ + _ACPI_XD | _ACPI_LO, /* 0x64 100 'd' */ + _ACPI_XD | _ACPI_LO, /* 0x65 101 'e' */ + _ACPI_XD | _ACPI_LO, /* 0x66 102 'f' */ + _ACPI_LO, /* 0x67 103 'g' */ + _ACPI_LO, /* 0x68 104 'h' */ + _ACPI_LO, /* 0x69 105 'i' */ + _ACPI_LO, /* 0x6A 106 'j' */ + _ACPI_LO, /* 0x6B 107 'k' */ + _ACPI_LO, /* 0x6C 108 'l' */ + _ACPI_LO, /* 0x6D 109 'm' */ + _ACPI_LO, /* 0x6E 110 'n' */ + _ACPI_LO, /* 0x6F 111 'o' */ + _ACPI_LO, /* 0x70 112 'p' */ + _ACPI_LO, /* 0x71 113 'q' */ + _ACPI_LO, /* 0x72 114 'r' */ + _ACPI_LO, /* 0x73 115 's' */ + _ACPI_LO, /* 0x74 116 't' */ + _ACPI_LO, /* 0x75 117 'u' */ + _ACPI_LO, /* 0x76 118 'v' */ + _ACPI_LO, /* 0x77 119 'w' */ + _ACPI_LO, /* 0x78 120 'x' */ + _ACPI_LO, /* 0x79 121 'y' */ + _ACPI_LO, /* 0x7A 122 'z' */ + _ACPI_PU, /* 0x7B 123 '{' */ + _ACPI_PU, /* 0x7C 124 '|' */ + _ACPI_PU, /* 0x7D 125 '}' */ + _ACPI_PU, /* 0x7E 126 '~' */ + _ACPI_CN, /* 0x7F 127 DEL */ + + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80 to 0x8F */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90 to 0x9F */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xA0 to 0xAF */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xB0 to 0xBF */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xC0 to 0xCF */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xD0 to 0xDF */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xE0 to 0xEF */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xF0 to 0xFF */ + 0 /* 0x100 */ +}; + +#endif /* ACPI_USE_SYSTEM_CLIBRARY */ |