/****************************************************************************** * * 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 */