arch/all-pc/acpica/source/compiler/asluuid.c

   1 /******************************************************************************
   2  *
   3  * Module Name: asluuid-- compiler UUID support
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2013, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44
  45 #include "aslcompiler.h"
  46
  47 #define _COMPONENT          ACPI_COMPILER
  48         ACPI_MODULE_NAME    ("asluuid")
  49
  50
  51 /*
  52  * UUID support functions.
  53  *
  54  * This table is used to convert an input UUID ascii string to a 16 byte
  55  * buffer and the reverse. The table maps a UUID buffer index 0-15 to
  56  * the index within the 36-byte UUID string where the associated 2-byte
  57  * hex value can be found.
  58  *
  59  * 36-byte UUID strings are of the form:
  60  *     aabbccdd-eeff-gghh-iijj-kkllmmnnoopp
  61  * Where aa-pp are one byte hex numbers, made up of two hex digits
  62  *
  63  * Note: This table is basically the inverse of the string-to-offset table
  64  * found in the ACPI spec in the description of the ToUUID macro.
  65  */
  66 static UINT8    Gbl_MapToUuidOffset[16] =
  67 {
  68     6,4,2,0,11,9,16,14,19,21,24,26,28,30,32,34
  69 };
  70
  71 #define UUID_BUFFER_LENGTH          16
  72 #define UUID_STRING_LENGTH          36
  73
  74 /* Positions for required hyphens (dashes) in UUID strings */
  75
  76 #define UUID_HYPHEN1_OFFSET         8
  77 #define UUID_HYPHEN2_OFFSET         13
  78 #define UUID_HYPHEN3_OFFSET         18
  79 #define UUID_HYPHEN4_OFFSET         23
  80
  81
  82 /*******************************************************************************
  83  *
  84  * FUNCTION:    AuValiduateUuid
  85  *
  86  * PARAMETERS:  InString            - 36-byte formatted UUID string
  87  *
  88  * RETURN:      Status
  89  *
  90  * DESCRIPTION: Check all 36 characters for correct format
  91  *
  92  ******************************************************************************/
  93
  94 ACPI_STATUS
  95 AuValidateUuid (
  96     char                    *InString)
  97 {
  98     UINT32                  i;
  99
 100
 101     if (!InString || (ACPI_STRLEN (InString) != UUID_STRING_LENGTH))
 102     {
 103         return (AE_BAD_PARAMETER);
 104     }
 105
 106     /* Check all 36 characters for correct format */
 107
 108     for (i = 0; i < UUID_STRING_LENGTH; i++)
 109     {
 110         /* Must have 4 hyphens (dashes) in these positions: */
 111
 112         if ((i == UUID_HYPHEN1_OFFSET) ||
 113             (i == UUID_HYPHEN2_OFFSET) ||
 114             (i == UUID_HYPHEN3_OFFSET) ||
 115             (i == UUID_HYPHEN4_OFFSET))
 116         {
 117             if (InString[i] != '-')
 118             {
 119                 return (AE_BAD_PARAMETER);
 120             }
 121         }
 122
 123         /* All other positions must contain hex digits */
 124
 125         else
 126         {
 127             if (!isxdigit ((int) InString[i]))
 128             {
 129                 return (AE_BAD_PARAMETER);
 130             }
 131         }
 132     }
 133
 134     return (AE_OK);
 135 }
 136
 137
 138 /*******************************************************************************
 139  *
 140  * FUNCTION:    AuConvertStringToUuid
 141  *
 142  * PARAMETERS:  InString            - 36-byte formatted UUID string
 143  *              UuidBuffer          - 16-byte UUID buffer
 144  *
 145  * RETURN:      Status
 146  *
 147  * DESCRIPTION: Convert 36-byte formatted UUID string to 16-byte UUID buffer
 148  *
 149  ******************************************************************************/
 150
 151 ACPI_STATUS
 152 AuConvertStringToUuid (
 153     char                    *InString,
 154     char                    *UuidBuffer)
 155 {
 156     UINT32                  i;
 157
 158
 159     if (!InString || !UuidBuffer)
 160     {
 161         return (AE_BAD_PARAMETER);
 162     }
 163
 164     for (i = 0; i < UUID_BUFFER_LENGTH; i++)
 165     {
 166         UuidBuffer[i]  = (char) (UtHexCharToValue (InString[Gbl_MapToUuidOffset[i]]) << 4);
 167         UuidBuffer[i] |= (char)  UtHexCharToValue (InString[Gbl_MapToUuidOffset[i] + 1]);
 168     }
 169
 170     return (AE_OK);
 171 }
 172
 173
 174 /*******************************************************************************
 175  *
 176  * FUNCTION:    AuConvertUuidToString
 177  *
 178  * PARAMETERS:  UuidBuffer          - 16-byte UUID buffer
 179  *              OutString           - 36-byte formatted UUID string
 180  *
 181  * RETURN:      Status
 182  *
 183  * DESCRIPTION: Convert 16-byte UUID buffer to 36-byte formatted UUID string
 184  *              OutString must be 37 bytes to include null terminator.
 185  *
 186  ******************************************************************************/
 187
 188 ACPI_STATUS
 189 AuConvertUuidToString (
 190     char                    *UuidBuffer,
 191     char                    *OutString)
 192 {
 193     UINT32                  i;
 194
 195
 196     if (!UuidBuffer || !OutString)
 197     {
 198         return (AE_BAD_PARAMETER);
 199     }
 200
 201     for (i = 0; i < UUID_BUFFER_LENGTH; i++)
 202     {
 203         OutString[Gbl_MapToUuidOffset[i]] =     (UINT8) AslHexLookup[(UuidBuffer[i] >> 4) & 0xF];
 204         OutString[Gbl_MapToUuidOffset[i] + 1] = (UINT8) AslHexLookup[UuidBuffer[i] & 0xF];
 205     }
 206
 207     /* Insert required hyphens (dashes) */
 208
 209     OutString[UUID_HYPHEN1_OFFSET] =
 210     OutString[UUID_HYPHEN2_OFFSET] =
 211     OutString[UUID_HYPHEN3_OFFSET] =
 212     OutString[UUID_HYPHEN4_OFFSET] = '-';
 213
 214     OutString[UUID_STRING_LENGTH] = 0; /* Null terminate */
 215     return (AE_OK);
 216 }