sys/contrib/dev/acpica/debugger/dbhistry.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dbhistry - debugger HISTORY command
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2011, 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 <contrib/dev/acpica/include/acpi.h>
  46 #include <contrib/dev/acpica/include/accommon.h>
  47 #include <contrib/dev/acpica/include/acdebug.h>
  48
  49 #ifdef ACPI_DEBUGGER
  50
  51 #define _COMPONENT          ACPI_CA_DEBUGGER
  52         ACPI_MODULE_NAME    ("dbhistry")
  53
  54
  55 #define HI_NO_HISTORY       0
  56 #define HI_RECORD_HISTORY   1
  57 #define HISTORY_SIZE        20
  58
  59
  60 typedef struct HistoryInfo
  61 {
  62     char                    Command[80];
  63     UINT32                  CmdNum;
  64
  65 } HISTORY_INFO;
  66
  67
  68 static HISTORY_INFO         AcpiGbl_HistoryBuffer[HISTORY_SIZE];
  69 static UINT16               AcpiGbl_LoHistory = 0;
  70 static UINT16               AcpiGbl_NumHistory = 0;
  71 static UINT16               AcpiGbl_NextHistoryIndex = 0;
  72 static UINT32               AcpiGbl_NextCmdNum = 1;
  73
  74
  75 /*******************************************************************************
  76  *
  77  * FUNCTION:    AcpiDbAddToHistory
  78  *
  79  * PARAMETERS:  CommandLine     - Command to add
  80  *
  81  * RETURN:      None
  82  *
  83  * DESCRIPTION: Add a command line to the history buffer.
  84  *
  85  ******************************************************************************/
  86
  87 void
  88 AcpiDbAddToHistory (
  89     char                    *CommandLine)
  90 {
  91
  92     /* Put command into the next available slot */
  93
  94     ACPI_STRCPY (AcpiGbl_HistoryBuffer[AcpiGbl_NextHistoryIndex].Command,
  95         CommandLine);
  96
  97     AcpiGbl_HistoryBuffer[AcpiGbl_NextHistoryIndex].CmdNum = AcpiGbl_NextCmdNum;
  98
  99     /* Adjust indexes */
 100
 101     if ((AcpiGbl_NumHistory == HISTORY_SIZE) &&
 102         (AcpiGbl_NextHistoryIndex == AcpiGbl_LoHistory))
 103     {
 104         AcpiGbl_LoHistory++;
 105         if (AcpiGbl_LoHistory >= HISTORY_SIZE)
 106         {
 107             AcpiGbl_LoHistory = 0;
 108         }
 109     }
 110
 111     AcpiGbl_NextHistoryIndex++;
 112     if (AcpiGbl_NextHistoryIndex >= HISTORY_SIZE)
 113     {
 114         AcpiGbl_NextHistoryIndex = 0;
 115     }
 116
 117     AcpiGbl_NextCmdNum++;
 118     if (AcpiGbl_NumHistory < HISTORY_SIZE)
 119     {
 120         AcpiGbl_NumHistory++;
 121     }
 122 }
 123
 124
 125 /*******************************************************************************
 126  *
 127  * FUNCTION:    AcpiDbDisplayHistory
 128  *
 129  * PARAMETERS:  None
 130  *
 131  * RETURN:      None
 132  *
 133  * DESCRIPTION: Display the contents of the history buffer
 134  *
 135  ******************************************************************************/
 136
 137 void
 138 AcpiDbDisplayHistory (
 139     void)
 140 {
 141     UINT32                  i;
 142     UINT16                  HistoryIndex;
 143
 144
 145     HistoryIndex = AcpiGbl_LoHistory;
 146
 147     /* Dump entire history buffer */
 148
 149     for (i = 0; i < AcpiGbl_NumHistory; i++)
 150     {
 151         AcpiOsPrintf ("%ld  %s\n", AcpiGbl_HistoryBuffer[HistoryIndex].CmdNum,
 152                                    AcpiGbl_HistoryBuffer[HistoryIndex].Command);
 153
 154         HistoryIndex++;
 155         if (HistoryIndex >= HISTORY_SIZE)
 156         {
 157             HistoryIndex = 0;
 158         }
 159     }
 160 }
 161
 162
 163 /*******************************************************************************
 164  *
 165  * FUNCTION:    AcpiDbGetFromHistory
 166  *
 167  * PARAMETERS:  CommandNumArg           - String containing the number of the
 168  *                                        command to be retrieved
 169  *
 170  * RETURN:      Pointer to the retrieved command. Null on error.
 171  *
 172  * DESCRIPTION: Get a command from the history buffer
 173  *
 174  ******************************************************************************/
 175
 176 char *
 177 AcpiDbGetFromHistory (
 178     char                    *CommandNumArg)
 179 {
 180     UINT32                  i;
 181     UINT16                  HistoryIndex;
 182     UINT32                  CmdNum;
 183
 184
 185     if (CommandNumArg == NULL)
 186     {
 187         CmdNum = AcpiGbl_NextCmdNum - 1;
 188     }
 189
 190     else
 191     {
 192         CmdNum = ACPI_STRTOUL (CommandNumArg, NULL, 0);
 193     }
 194
 195     /* Search history buffer */
 196
 197     HistoryIndex = AcpiGbl_LoHistory;
 198     for (i = 0; i < AcpiGbl_NumHistory; i++)
 199     {
 200         if (AcpiGbl_HistoryBuffer[HistoryIndex].CmdNum == CmdNum)
 201         {
 202             /* Found the commnad, return it */
 203
 204             return (AcpiGbl_HistoryBuffer[HistoryIndex].Command);
 205         }
 206
 207
 208         HistoryIndex++;
 209         if (HistoryIndex >= HISTORY_SIZE)
 210         {
 211             HistoryIndex = 0;
 212         }
 213     }
 214
 215     AcpiOsPrintf ("Invalid history number: %u\n", HistoryIndex);
 216     return (NULL);
 217 }
 218
 219 #endif /* ACPI_DEBUGGER */
 220