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 "acpi.h"
46 #include "accommon.h"
47 #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