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fuchsia / zircon / / 13ee3dc5e4c46bf127977ad28645c47442ec517d / . / third_party / lib / acpica / source / components / utilities / utclib.c
blob: 8c188d00a4cf9d6b4fe8771c52f48b655abb845a [file] [log] [blame]
/******************************************************************************
*
* Module Name: utclib - ACPICA implementations of 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.
*/
#define ACPI_CLIBRARY
#include "acpi.h"
#include "accommon.h"
/*
* This module contains implementations of the standard C library functions
* that are required by the ACPICA code at both application level and kernel
* level.
*
* The module is an optional feature that can be used if a local/system
* C library is not available. Some operating system kernels may not have
* an internal C library.
*
* In general, these functions are less efficient than an inline or assembly
* code implementation.
*
* These C functions and the associated prototypes are enabled by default
* unless the ACPI_USE_SYSTEM_CLIBRARY symbol is defined. This is usually
* automatically defined for the ACPICA applications such as iASL and
* AcpiExec, so that these user-level applications use the local C library
* instead of the functions in this module.
*/
/*******************************************************************************
*
* Functions implemented in this module:
*
* FUNCTION: memcmp
* FUNCTION: memcpy
* FUNCTION: memset
* FUNCTION: strlen
* FUNCTION: strcpy
* FUNCTION: strncpy
* FUNCTION: strcmp
* FUNCTION: strchr
* FUNCTION: strncmp
* FUNCTION: strcat
* FUNCTION: strncat
* FUNCTION: strstr
* FUNCTION: strtoul
* FUNCTION: toupper
* FUNCTION: tolower
* FUNCTION: is* functions
*
******************************************************************************/
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME ("utclib")
#ifndef ACPI_USE_SYSTEM_CLIBRARY /* Entire module */
/*******************************************************************************
*
* FUNCTION: 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
memcmp (
void *VBuffer1,
void *VBuffer2,
ACPI_SIZE Count)
{
char *Buffer1 = (char *) VBuffer1;
char *Buffer2 = (char *) VBuffer2;
for ( ; Count-- && (*Buffer1 == *Buffer2); Buffer1++, Buffer2++)
{
}
return ((Count == ACPI_SIZE_MAX) ? 0 : ((unsigned char) *Buffer1 -
(unsigned char) *Buffer2));
}
/*******************************************************************************
*
* FUNCTION: 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 *
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: 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 *
memset (
void *Dest,
int Value,
ACPI_SIZE Count)
{
char *New = (char *) Dest;
while (Count)
{
*New = (char) Value;
New++;
Count--;
}
return (Dest);
}
/*******************************************************************************
*
* FUNCTION: strlen
*
* PARAMETERS: String - Null terminated string
*
* RETURN: Length
*
* DESCRIPTION: Returns the length of the input string
*
******************************************************************************/
ACPI_SIZE
strlen (
const char *String)
{
UINT32 Length = 0;
/* Count the string until a null is encountered */
while (*String)
{
Length++;
String++;
}
return (Length);
}
/*******************************************************************************
*
* FUNCTION: strcpy
*
* PARAMETERS: DstString - Target of the copy
* SrcString - The source string to copy
*
* RETURN: DstString
*
* DESCRIPTION: Copy a null terminated string
*
******************************************************************************/
char *
strcpy (
char *DstString,
const char *SrcString)
{
char *String = DstString;
/* Move bytes brute force */
while (*SrcString)
{
*String = *SrcString;
String++;
SrcString++;
}
/* Null terminate */
*String = 0;
return (DstString);
}
/*******************************************************************************
*
* FUNCTION: strncpy
*
* PARAMETERS: DstString - Target of the copy
* SrcString - The source string to copy
* Count - Maximum # of bytes to copy
*
* RETURN: DstString
*
* DESCRIPTION: Copy a null terminated string, with a maximum length
*
******************************************************************************/
char *
strncpy (
char *DstString,
const char *SrcString,
ACPI_SIZE Count)
{
char *String = DstString;
/* Copy the string */
for (String = DstString;
Count && (Count--, (*String++ = *SrcString++)); )
{;}
/* Pad with nulls if necessary */
while (Count--)
{
*String = 0;
String++;
}
/* Return original pointer */
return (DstString);
}
/*******************************************************************************
*
* FUNCTION: 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
strcmp (
const char *String1,
const char *String2)
{
for ( ; (*String1 == *String2); String2++)
{
if (!*String1++)
{
return (0);
}
}
return ((unsigned char) *String1 - (unsigned char) *String2);
}
/*******************************************************************************
*
* FUNCTION: 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 *
strchr (
const char *String,
int ch)
{
for ( ; (*String); String++)
{
if ((*String) == (char) ch)
{
return ((char *) String);
}
}
return (NULL);
}
/*******************************************************************************
*
* FUNCTION: 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
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: strcat
*
* PARAMETERS: DstString - Target of the copy
* SrcString - The source string to copy
*
* RETURN: DstString
*
* DESCRIPTION: Append a null terminated string to a null terminated string
*
******************************************************************************/
char *
strcat (
char *DstString,
const char *SrcString)
{
char *String;
/* Find end of the destination string */
for (String = DstString; *String++; )
{ ; }
/* Concatenate the string */
for (--String; (*String++ = *SrcString++); )
{ ; }
return (DstString);
}
/*******************************************************************************
*
* FUNCTION: strncat
*
* PARAMETERS: DstString - Target of the copy
* SrcString - The source string to copy
* Count - Maximum # of bytes to copy
*
* RETURN: DstString
*
* DESCRIPTION: Append a null terminated string to a null terminated string,
* with a maximum count.
*
******************************************************************************/
char *
strncat (
char *DstString,
const char *SrcString,
ACPI_SIZE Count)
{
char *String;
if (Count)
{
/* Find end of the destination string */
for (String = DstString; *String++; )
{ ; }
/* Concatenate the string */
for (--String; (*String++ = *SrcString++) && --Count; )
{ ; }
/* Null terminate if necessary */
if (!Count)
{
*String = 0;
}
}
return (DstString);
}
/*******************************************************************************
*
* FUNCTION: 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 *
strstr (
char *String1,
char *String2)
{
UINT32 Length;
Length = strlen (String2);
if (!Length)
{
return (String1);
}
while (strlen (String1) >= Length)
{
if (memcmp (String1, String2, Length) == 0)
{
return (String1);
}
String1++;
}
return (NULL);
}
/*******************************************************************************
*
* FUNCTION: 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 strtoul64 for 64-bit integers.
*
******************************************************************************/
UINT32
strtoul (
const char *String,
char **Terminator,
UINT32 Base)
{
UINT32 converted = 0;
UINT32 index;
UINT32 sign;
const char *StringStart;
UINT32 ReturnValue = 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:
*/
StringStart = String;
while (isspace (*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 (*(++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' &&
tolower (*(++String)) == 'x')
{
String++;
}
/*
* Main loop: convert the string to an unsigned long:
*/
while (*String)
{
if (isdigit (*String))
{
index = (UINT32) ((UINT8) *String - '0');
}
else
{
index = (UINT32) toupper (*String);
if (isupper (index))
{
index = index - 'A' + 10;
}
else
{
goto done;
}
}
if (index >= Base)
{
goto done;
}
/*
* Check to see if value is out of range:
*/
if (ReturnValue > ((ACPI_UINT32_MAX - (UINT32) index) /
(UINT32) Base))
{
Status = AE_ERROR;
ReturnValue = 0; /* reset */
}
else
{
ReturnValue *= Base;
ReturnValue += 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 && ReturnValue == 0 && String != NULL)
{
*Terminator = (char *) StringStart;
}
else
{
*Terminator = (char *) String;
}
}
if (Status == AE_ERROR)
{
ReturnValue = ACPI_UINT32_MAX;
}
/*
* If a minus sign was present, then "the conversion is negated":
*/
if (sign == ACPI_SIGN_NEGATIVE)
{
ReturnValue = (ACPI_UINT32_MAX - ReturnValue) + 1;
}
return (ReturnValue);
}
/*******************************************************************************
*
* FUNCTION: toupper
*
* PARAMETERS: c - Character to convert
*
* RETURN: Converted character as an int
*
* DESCRIPTION: Convert character to uppercase
*
******************************************************************************/
int
toupper (
int c)
{
return (islower(c) ? ((c)-0x20) : (c));
}
/*******************************************************************************
*
* FUNCTION: tolower
*
* PARAMETERS: c - Character to convert
*
* RETURN: Converted character as an int
*
* DESCRIPTION: Convert character to lowercase
*
******************************************************************************/
int
tolower (
int c)
{
return (isupper(c) ? ((c)+0x20) : (c));
}
/*******************************************************************************
*
* FUNCTION: is* function array
*
* DESCRIPTION: is* functions use the ctype table below
*
******************************************************************************/
const UINT8 AcpiGbl_Ctypes[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 */