dbhistry.c revision 229989 
1/******************************************************************************
2 *
3 * Module Name: dbhistry - debugger HISTORY command
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2012, 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
60typedef struct HistoryInfo
61{
62    char                    Command[80];
63    UINT32                  CmdNum;
64
65} HISTORY_INFO;
66
67
68static HISTORY_INFO         AcpiGbl_HistoryBuffer[HISTORY_SIZE];
69static UINT16               AcpiGbl_LoHistory = 0;
70static UINT16               AcpiGbl_NumHistory = 0;
71static UINT16               AcpiGbl_NextHistoryIndex = 0;
72static 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
87void
88AcpiDbAddToHistory (
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
137void
138AcpiDbDisplayHistory (
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
176char *
177AcpiDbGetFromHistory (
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
221