renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-28 23:23:55 +08:00
Code
7d8a25674f
linux-next/drivers/acpi/acpica/utclib.c
Bob Moore b9e1769357 ACPICA: Update local C library module comments for ASCII table 
Improve the commenting of the table.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-11-15 00:31:25 +01:00

750 lines
20 KiB
C
Raw Blame History

/******************************************************************************
*
* 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 */
View Git Blame Copy Permalink