Home | History | Annotate | Line # | Download | only in acpisrc
asutils.c revision 1.1.1.2.24.1
      1 /******************************************************************************
      2  *
      3  * Module Name: asutils - common utilities
      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 #include "acpisrc.h"
     45 
     46 
     47 /*******************************************************************************
     48  *
     49  * FUNCTION:    AsStrlwr (strlwr)
     50  *
     51  * PARAMETERS:  SrcString       - The source string to convert
     52  *
     53  * RETURN:      None
     54  *
     55  * DESCRIPTION: Convert string to lowercase
     56  *
     57  * NOTE: This is not a POSIX function, so it appears here so that we don't have
     58  * header file issues with the various hosts/compilers/clibs.
     59  *
     60  ******************************************************************************/
     61 
     62 void
     63 AsStrlwr (
     64     char                    *SrcString)
     65 {
     66     char                    *String;
     67 
     68 
     69     /* Walk entire string, lowercasing the letters */
     70 
     71     if (SrcString)
     72     {
     73         for (String = SrcString; *String; String++)
     74         {
     75             *String = (char) ACPI_TOLOWER (*String);
     76         }
     77     }
     78 }
     79 
     80 
     81 /******************************************************************************
     82  *
     83  * FUNCTION:    AsSkipUntilChar
     84  *
     85  * DESCRIPTION: Find the next instance of the input character
     86  *
     87  ******************************************************************************/
     88 
     89 char *
     90 AsSkipUntilChar (
     91     char                    *Buffer,
     92     char                    Target)
     93 {
     94 
     95     while (*Buffer != Target)
     96     {
     97         if (!*Buffer)
     98         {
     99             return (NULL);
    100         }
    101 
    102         Buffer++;
    103     }
    104 
    105     return (Buffer);
    106 }
    107 
    108 
    109 /******************************************************************************
    110  *
    111  * FUNCTION:    AsSkipPastChar
    112  *
    113  * DESCRIPTION: Find the next instance of the input character, return a buffer
    114  *              pointer to this character+1.
    115  *
    116  ******************************************************************************/
    117 
    118 char *
    119 AsSkipPastChar (
    120     char                    *Buffer,
    121     char                    Target)
    122 {
    123 
    124     while (*Buffer != Target)
    125     {
    126         if (!*Buffer)
    127         {
    128             return (NULL);
    129         }
    130 
    131         Buffer++;
    132     }
    133 
    134     Buffer++;
    135 
    136     return (Buffer);
    137 }
    138 
    139 
    140 /******************************************************************************
    141  *
    142  * FUNCTION:    AsReplaceData
    143  *
    144  * DESCRIPTION: This function inserts and removes data from the file buffer.
    145  *              if more data is inserted than is removed, the data in the buffer
    146  *              is moved to make room. If less data is inserted than is removed,
    147  *              the remaining data is moved to close the hole.
    148  *
    149  ******************************************************************************/
    150 
    151 char *
    152 AsReplaceData (
    153     char                    *Buffer,
    154     UINT32                  LengthToRemove,
    155     char                    *BufferToAdd,
    156     UINT32                  LengthToAdd)
    157 {
    158     UINT32                  BufferLength;
    159 
    160 
    161     /*
    162      * Buffer is a string, so the length must include the terminating zero
    163      */
    164     BufferLength = strlen (Buffer) + 1;
    165 
    166     if (LengthToRemove != LengthToAdd)
    167     {
    168         /*
    169          * Move some of the existing data
    170          * 1) If adding more bytes than removing, make room for the new data
    171          * 2) if removing more bytes than adding, delete the extra space
    172          */
    173         if (LengthToRemove > 0)
    174         {
    175             Gbl_MadeChanges = TRUE;
    176             memmove ((Buffer + LengthToAdd), (Buffer + LengthToRemove), (BufferLength - LengthToRemove));
    177         }
    178     }
    179 
    180     /*
    181      * Now we can move in the new data
    182      */
    183     if (LengthToAdd > 0)
    184     {
    185         Gbl_MadeChanges = TRUE;
    186         memmove (Buffer, BufferToAdd, LengthToAdd);
    187     }
    188 
    189     return (Buffer + LengthToAdd);
    190 }
    191 
    192 
    193 /******************************************************************************
    194  *
    195  * FUNCTION:    AsInsertData
    196  *
    197  * DESCRIPTION: This function inserts and removes data from the file buffer.
    198  *              if more data is inserted than is removed, the data in the buffer
    199  *              is moved to make room. If less data is inserted than is removed,
    200  *              the remaining data is moved to close the hole.
    201  *
    202  ******************************************************************************/
    203 
    204 char *
    205 AsInsertData (
    206     char                    *Buffer,
    207     char                    *BufferToAdd,
    208     UINT32                  LengthToAdd)
    209 {
    210     UINT32                  BufferLength;
    211 
    212 
    213     if (LengthToAdd > 0)
    214     {
    215         /*
    216          * Buffer is a string, so the length must include the terminating zero
    217          */
    218         BufferLength = strlen (Buffer) + 1;
    219 
    220         /*
    221          * Move some of the existing data
    222          * 1) If adding more bytes than removing, make room for the new data
    223          * 2) if removing more bytes than adding, delete the extra space
    224          */
    225         Gbl_MadeChanges = TRUE;
    226         memmove ((Buffer + LengthToAdd), Buffer, BufferLength);
    227 
    228         /*
    229          * Now we can move in the new data
    230          */
    231         memmove (Buffer, BufferToAdd, LengthToAdd);
    232     }
    233 
    234     return (Buffer + LengthToAdd);
    235 }
    236 
    237 
    238 /******************************************************************************
    239  *
    240  * FUNCTION:    AsRemoveData
    241  *
    242  * DESCRIPTION: This function inserts and removes data from the file buffer.
    243  *              if more data is inserted than is removed, the data in the buffer
    244  *              is moved to make room. If less data is inserted than is removed,
    245  *              the remaining data is moved to close the hole.
    246  *
    247  ******************************************************************************/
    248 
    249 char *
    250 AsRemoveData (
    251     char                    *StartPointer,
    252     char                    *EndPointer)
    253 {
    254     UINT32                  BufferLength;
    255 
    256 
    257     /*
    258      * Buffer is a string, so the length must include the terminating zero
    259      */
    260     BufferLength = strlen (EndPointer) + 1;
    261 
    262     Gbl_MadeChanges = TRUE;
    263     memmove (StartPointer, EndPointer, BufferLength);
    264 
    265     return (StartPointer);
    266 }
    267