xref: /illumos-gate/usr/src/cmd/acpi/common/acgetline.c (revision 35786f68)
1bc36eafdSMike Gerdts /******************************************************************************
2bc36eafdSMike Gerdts  *
3bc36eafdSMike Gerdts  * Module Name: acgetline - local line editing
4bc36eafdSMike Gerdts  *
5bc36eafdSMike Gerdts  *****************************************************************************/
6bc36eafdSMike Gerdts 
7*35786f68SRobert Mustacchi /******************************************************************************
8*35786f68SRobert Mustacchi  *
9*35786f68SRobert Mustacchi  * 1. Copyright Notice
10*35786f68SRobert Mustacchi  *
11*35786f68SRobert Mustacchi  * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp.
12bc36eafdSMike Gerdts  * All rights reserved.
13bc36eafdSMike Gerdts  *
14*35786f68SRobert Mustacchi  * 2. License
15*35786f68SRobert Mustacchi  *
16*35786f68SRobert Mustacchi  * 2.1. This is your license from Intel Corp. under its intellectual property
17*35786f68SRobert Mustacchi  * rights. You may have additional license terms from the party that provided
18*35786f68SRobert Mustacchi  * you this software, covering your right to use that party's intellectual
19*35786f68SRobert Mustacchi  * property rights.
20*35786f68SRobert Mustacchi  *
21*35786f68SRobert Mustacchi  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22*35786f68SRobert Mustacchi  * copy of the source code appearing in this file ("Covered Code") an
23*35786f68SRobert Mustacchi  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24*35786f68SRobert Mustacchi  * base code distributed originally by Intel ("Original Intel Code") to copy,
25*35786f68SRobert Mustacchi  * make derivatives, distribute, use and display any portion of the Covered
26*35786f68SRobert Mustacchi  * Code in any form, with the right to sublicense such rights; and
27*35786f68SRobert Mustacchi  *
28*35786f68SRobert Mustacchi  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29*35786f68SRobert Mustacchi  * license (with the right to sublicense), under only those claims of Intel
30*35786f68SRobert Mustacchi  * patents that are infringed by the Original Intel Code, to make, use, sell,
31*35786f68SRobert Mustacchi  * offer to sell, and import the Covered Code and derivative works thereof
32*35786f68SRobert Mustacchi  * solely to the minimum extent necessary to exercise the above copyright
33*35786f68SRobert Mustacchi  * license, and in no event shall the patent license extend to any additions
34*35786f68SRobert Mustacchi  * to or modifications of the Original Intel Code. No other license or right
35*35786f68SRobert Mustacchi  * is granted directly or by implication, estoppel or otherwise;
36*35786f68SRobert Mustacchi  *
37*35786f68SRobert Mustacchi  * The above copyright and patent license is granted only if the following
38*35786f68SRobert Mustacchi  * conditions are met:
39*35786f68SRobert Mustacchi  *
40*35786f68SRobert Mustacchi  * 3. Conditions
41*35786f68SRobert Mustacchi  *
42*35786f68SRobert Mustacchi  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43*35786f68SRobert Mustacchi  * Redistribution of source code of any substantial portion of the Covered
44*35786f68SRobert Mustacchi  * Code or modification with rights to further distribute source must include
45*35786f68SRobert Mustacchi  * the above Copyright Notice, the above License, this list of Conditions,
46*35786f68SRobert Mustacchi  * and the following Disclaimer and Export Compliance provision. In addition,
47*35786f68SRobert Mustacchi  * Licensee must cause all Covered Code to which Licensee contributes to
48*35786f68SRobert Mustacchi  * contain a file documenting the changes Licensee made to create that Covered
49*35786f68SRobert Mustacchi  * Code and the date of any change. Licensee must include in that file the
50*35786f68SRobert Mustacchi  * documentation of any changes made by any predecessor Licensee. Licensee
51*35786f68SRobert Mustacchi  * must include a prominent statement that the modification is derived,
52*35786f68SRobert Mustacchi  * directly or indirectly, from Original Intel Code.
53*35786f68SRobert Mustacchi  *
54*35786f68SRobert Mustacchi  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55*35786f68SRobert Mustacchi  * Redistribution of source code of any substantial portion of the Covered
56*35786f68SRobert Mustacchi  * Code or modification without rights to further distribute source must
57*35786f68SRobert Mustacchi  * include the following Disclaimer and Export Compliance provision in the
58*35786f68SRobert Mustacchi  * documentation and/or other materials provided with distribution. In
59*35786f68SRobert Mustacchi  * addition, Licensee may not authorize further sublicense of source of any
60*35786f68SRobert Mustacchi  * portion of the Covered Code, and must include terms to the effect that the
61*35786f68SRobert Mustacchi  * license from Licensee to its licensee is limited to the intellectual
62*35786f68SRobert Mustacchi  * property embodied in the software Licensee provides to its licensee, and
63*35786f68SRobert Mustacchi  * not to intellectual property embodied in modifications its licensee may
64*35786f68SRobert Mustacchi  * make.
65*35786f68SRobert Mustacchi  *
66*35786f68SRobert Mustacchi  * 3.3. Redistribution of Executable. Redistribution in executable form of any
67*35786f68SRobert Mustacchi  * substantial portion of the Covered Code or modification must reproduce the
68*35786f68SRobert Mustacchi  * above Copyright Notice, and the following Disclaimer and Export Compliance
69*35786f68SRobert Mustacchi  * provision in the documentation and/or other materials provided with the
70*35786f68SRobert Mustacchi  * distribution.
71*35786f68SRobert Mustacchi  *
72*35786f68SRobert Mustacchi  * 3.4. Intel retains all right, title, and interest in and to the Original
73*35786f68SRobert Mustacchi  * Intel Code.
74*35786f68SRobert Mustacchi  *
75*35786f68SRobert Mustacchi  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76*35786f68SRobert Mustacchi  * Intel shall be used in advertising or otherwise to promote the sale, use or
77*35786f68SRobert Mustacchi  * other dealings in products derived from or relating to the Covered Code
78*35786f68SRobert Mustacchi  * without prior written authorization from Intel.
79*35786f68SRobert Mustacchi  *
80*35786f68SRobert Mustacchi  * 4. Disclaimer and Export Compliance
81*35786f68SRobert Mustacchi  *
82*35786f68SRobert Mustacchi  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83*35786f68SRobert Mustacchi  * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84*35786f68SRobert Mustacchi  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85*35786f68SRobert Mustacchi  * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86*35786f68SRobert Mustacchi  * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87*35786f68SRobert Mustacchi  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88*35786f68SRobert Mustacchi  * PARTICULAR PURPOSE.
89*35786f68SRobert Mustacchi  *
90*35786f68SRobert Mustacchi  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91*35786f68SRobert Mustacchi  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92*35786f68SRobert Mustacchi  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93*35786f68SRobert Mustacchi  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94*35786f68SRobert Mustacchi  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95*35786f68SRobert Mustacchi  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96*35786f68SRobert Mustacchi  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97*35786f68SRobert Mustacchi  * LIMITED REMEDY.
98*35786f68SRobert Mustacchi  *
99*35786f68SRobert Mustacchi  * 4.3. Licensee shall not export, either directly or indirectly, any of this
100*35786f68SRobert Mustacchi  * software or system incorporating such software without first obtaining any
101*35786f68SRobert Mustacchi  * required license or other approval from the U. S. Department of Commerce or
102*35786f68SRobert Mustacchi  * any other agency or department of the United States Government. In the
103*35786f68SRobert Mustacchi  * event Licensee exports any such software from the United States or
104*35786f68SRobert Mustacchi  * re-exports any such software from a foreign destination, Licensee shall
105*35786f68SRobert Mustacchi  * ensure that the distribution and export/re-export of the software is in
106*35786f68SRobert Mustacchi  * compliance with all laws, regulations, orders, or other restrictions of the
107*35786f68SRobert Mustacchi  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108*35786f68SRobert Mustacchi  * any of its subsidiaries will export/re-export any technical data, process,
109*35786f68SRobert Mustacchi  * software, or service, directly or indirectly, to any country for which the
110*35786f68SRobert Mustacchi  * United States government or any agency thereof requires an export license,
111*35786f68SRobert Mustacchi  * other governmental approval, or letter of assurance, without first obtaining
112*35786f68SRobert Mustacchi  * such license, approval or letter.
113*35786f68SRobert Mustacchi  *
114*35786f68SRobert Mustacchi  *****************************************************************************
115*35786f68SRobert Mustacchi  *
116*35786f68SRobert Mustacchi  * Alternatively, you may choose to be licensed under the terms of the
117*35786f68SRobert Mustacchi  * following license:
118*35786f68SRobert Mustacchi  *
119bc36eafdSMike Gerdts  * Redistribution and use in source and binary forms, with or without
120bc36eafdSMike Gerdts  * modification, are permitted provided that the following conditions
121bc36eafdSMike Gerdts  * are met:
122bc36eafdSMike Gerdts  * 1. Redistributions of source code must retain the above copyright
123bc36eafdSMike Gerdts  *    notice, this list of conditions, and the following disclaimer,
124bc36eafdSMike Gerdts  *    without modification.
125bc36eafdSMike Gerdts  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126bc36eafdSMike Gerdts  *    substantially similar to the "NO WARRANTY" disclaimer below
127bc36eafdSMike Gerdts  *    ("Disclaimer") and any redistribution must be conditioned upon
128bc36eafdSMike Gerdts  *    including a substantially similar Disclaimer requirement for further
129bc36eafdSMike Gerdts  *    binary redistribution.
130bc36eafdSMike Gerdts  * 3. Neither the names of the above-listed copyright holders nor the names
131bc36eafdSMike Gerdts  *    of any contributors may be used to endorse or promote products derived
132bc36eafdSMike Gerdts  *    from this software without specific prior written permission.
133bc36eafdSMike Gerdts  *
134bc36eafdSMike Gerdts  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135bc36eafdSMike Gerdts  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136*35786f68SRobert Mustacchi  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137bc36eafdSMike Gerdts  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138*35786f68SRobert Mustacchi  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139*35786f68SRobert Mustacchi  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140*35786f68SRobert Mustacchi  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141*35786f68SRobert Mustacchi  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142*35786f68SRobert Mustacchi  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143*35786f68SRobert Mustacchi  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144*35786f68SRobert Mustacchi  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145*35786f68SRobert Mustacchi  *
146*35786f68SRobert Mustacchi  * Alternatively, you may choose to be licensed under the terms of the
147*35786f68SRobert Mustacchi  * GNU General Public License ("GPL") version 2 as published by the Free
148*35786f68SRobert Mustacchi  * Software Foundation.
149*35786f68SRobert Mustacchi  *
150*35786f68SRobert Mustacchi  *****************************************************************************/
151bc36eafdSMike Gerdts 
152bc36eafdSMike Gerdts #include "acpi.h"
153bc36eafdSMike Gerdts #include "accommon.h"
154bc36eafdSMike Gerdts #include "amlcode.h"
155bc36eafdSMike Gerdts #include "acparser.h"
156bc36eafdSMike Gerdts #include "acdebug.h"
157bc36eafdSMike Gerdts 
158bc36eafdSMike Gerdts /*
159bc36eafdSMike Gerdts  * This is an os-independent implementation of line-editing services needed
160bc36eafdSMike Gerdts  * by the AcpiExec utility. It uses getchar() and putchar() and the existing
161bc36eafdSMike Gerdts  * history support provided by the AML debugger. It assumes that the terminal
162bc36eafdSMike Gerdts  * is in the correct line-editing mode such as raw and noecho. The OSL
163bc36eafdSMike Gerdts  * interface AcpiOsInitialize should do this. AcpiOsTerminate should put the
164bc36eafdSMike Gerdts  * terminal back into the original mode.
165bc36eafdSMike Gerdts  */
166bc36eafdSMike Gerdts #define _COMPONENT          ACPI_OS_SERVICES
167bc36eafdSMike Gerdts         ACPI_MODULE_NAME    ("acgetline")
168bc36eafdSMike Gerdts 
169bc36eafdSMike Gerdts 
170bc36eafdSMike Gerdts /* Local prototypes */
171bc36eafdSMike Gerdts 
172bc36eafdSMike Gerdts static void
173bc36eafdSMike Gerdts AcpiAcClearLine (
174bc36eafdSMike Gerdts     UINT32                  EndOfLine,
175bc36eafdSMike Gerdts     UINT32                  CursorPosition);
176bc36eafdSMike Gerdts 
177bc36eafdSMike Gerdts /* Various ASCII constants */
178bc36eafdSMike Gerdts 
179bc36eafdSMike Gerdts #define _ASCII_NUL                  0
180bc36eafdSMike Gerdts #define _ASCII_BACKSPACE            0x08
181bc36eafdSMike Gerdts #define _ASCII_TAB                  0x09
182bc36eafdSMike Gerdts #define _ASCII_ESCAPE               0x1B
183bc36eafdSMike Gerdts #define _ASCII_SPACE                0x20
184bc36eafdSMike Gerdts #define _ASCII_LEFT_BRACKET         0x5B
185bc36eafdSMike Gerdts #define _ASCII_DEL                  0x7F
186bc36eafdSMike Gerdts #define _ASCII_UP_ARROW             'A'
187bc36eafdSMike Gerdts #define _ASCII_DOWN_ARROW           'B'
188bc36eafdSMike Gerdts #define _ASCII_RIGHT_ARROW          'C'
189bc36eafdSMike Gerdts #define _ASCII_LEFT_ARROW           'D'
190bc36eafdSMike Gerdts #define _ASCII_NEWLINE              '\n'
191bc36eafdSMike Gerdts 
192bc36eafdSMike Gerdts extern UINT32               AcpiGbl_NextCmdNum;
193bc36eafdSMike Gerdts 
194bc36eafdSMike Gerdts /* Erase a single character on the input command line */
195bc36eafdSMike Gerdts 
196bc36eafdSMike Gerdts #define ACPI_CLEAR_CHAR() \
197bc36eafdSMike Gerdts     putchar (_ASCII_BACKSPACE); \
198bc36eafdSMike Gerdts     putchar (_ASCII_SPACE); \
199bc36eafdSMike Gerdts     putchar (_ASCII_BACKSPACE);
200bc36eafdSMike Gerdts 
201bc36eafdSMike Gerdts /* Backup cursor by Count positions */
202bc36eafdSMike Gerdts 
203bc36eafdSMike Gerdts #define ACPI_BACKUP_CURSOR(i, Count) \
204bc36eafdSMike Gerdts     for (i = 0; i < (Count); i++) \
205bc36eafdSMike Gerdts         {putchar (_ASCII_BACKSPACE);}
206bc36eafdSMike Gerdts 
207bc36eafdSMike Gerdts 
208bc36eafdSMike Gerdts /******************************************************************************
209bc36eafdSMike Gerdts  *
210bc36eafdSMike Gerdts  * FUNCTION:    AcpiAcClearLine
211bc36eafdSMike Gerdts  *
212bc36eafdSMike Gerdts  * PARAMETERS:  EndOfLine           - Current end-of-line index
213bc36eafdSMike Gerdts  *              CursorPosition      - Current cursor position within line
214bc36eafdSMike Gerdts  *
215bc36eafdSMike Gerdts  * RETURN:      None
216bc36eafdSMike Gerdts  *
217bc36eafdSMike Gerdts  * DESCRIPTION: Clear the entire command line the hard way, but probably the
218bc36eafdSMike Gerdts  *              most portable.
219bc36eafdSMike Gerdts  *
220bc36eafdSMike Gerdts  *****************************************************************************/
221bc36eafdSMike Gerdts 
222bc36eafdSMike Gerdts static void
AcpiAcClearLine(UINT32 EndOfLine,UINT32 CursorPosition)223bc36eafdSMike Gerdts AcpiAcClearLine (
224bc36eafdSMike Gerdts     UINT32                  EndOfLine,
225bc36eafdSMike Gerdts     UINT32                  CursorPosition)
226bc36eafdSMike Gerdts {
227bc36eafdSMike Gerdts     UINT32                  i;
228bc36eafdSMike Gerdts 
229bc36eafdSMike Gerdts 
230bc36eafdSMike Gerdts     if (CursorPosition < EndOfLine)
231bc36eafdSMike Gerdts     {
232bc36eafdSMike Gerdts         /* Clear line from current position to end of line */
233bc36eafdSMike Gerdts 
234bc36eafdSMike Gerdts         for (i = 0; i < (EndOfLine - CursorPosition); i++)
235bc36eafdSMike Gerdts         {
236bc36eafdSMike Gerdts             putchar (' ');
237bc36eafdSMike Gerdts         }
238bc36eafdSMike Gerdts     }
239bc36eafdSMike Gerdts 
240bc36eafdSMike Gerdts     /* Clear the entire line */
241bc36eafdSMike Gerdts 
242bc36eafdSMike Gerdts     for (; EndOfLine > 0; EndOfLine--)
243bc36eafdSMike Gerdts     {
244bc36eafdSMike Gerdts         ACPI_CLEAR_CHAR ();
245bc36eafdSMike Gerdts     }
246bc36eafdSMike Gerdts }
247bc36eafdSMike Gerdts 
248bc36eafdSMike Gerdts 
249bc36eafdSMike Gerdts /******************************************************************************
250bc36eafdSMike Gerdts  *
251bc36eafdSMike Gerdts  * FUNCTION:    AcpiOsGetLine
252bc36eafdSMike Gerdts  *
253bc36eafdSMike Gerdts  * PARAMETERS:  Buffer              - Where to return the command line
254bc36eafdSMike Gerdts  *              BufferLength        - Maximum length of Buffer
255bc36eafdSMike Gerdts  *              BytesRead           - Where the actual byte count is returned
256bc36eafdSMike Gerdts  *
257bc36eafdSMike Gerdts  * RETURN:      Status and actual bytes read
258bc36eafdSMike Gerdts  *
259bc36eafdSMike Gerdts  * DESCRIPTION: Get the next input line from the terminal. NOTE: terminal
260bc36eafdSMike Gerdts  *              is expected to be in a mode that supports line-editing (raw,
261bc36eafdSMike Gerdts  *              noecho). This function is intended to be very portable. Also,
262bc36eafdSMike Gerdts  *              it uses the history support implemented in the AML debugger.
263bc36eafdSMike Gerdts  *
264bc36eafdSMike Gerdts  *****************************************************************************/
265bc36eafdSMike Gerdts 
266bc36eafdSMike Gerdts ACPI_STATUS
AcpiOsGetLine(char * Buffer,UINT32 BufferLength,UINT32 * BytesRead)267bc36eafdSMike Gerdts AcpiOsGetLine (
268bc36eafdSMike Gerdts     char                    *Buffer,
269bc36eafdSMike Gerdts     UINT32                  BufferLength,
270bc36eafdSMike Gerdts     UINT32                  *BytesRead)
271bc36eafdSMike Gerdts {
272bc36eafdSMike Gerdts     char                    *NextCommand;
273bc36eafdSMike Gerdts     UINT32                  MaxCommandIndex = AcpiGbl_NextCmdNum - 1;
274bc36eafdSMike Gerdts     UINT32                  CurrentCommandIndex = MaxCommandIndex;
275bc36eafdSMike Gerdts     UINT32                  PreviousCommandIndex = MaxCommandIndex;
276bc36eafdSMike Gerdts     int                     InputChar;
277bc36eafdSMike Gerdts     UINT32                  CursorPosition = 0;
278bc36eafdSMike Gerdts     UINT32                  EndOfLine = 0;
279bc36eafdSMike Gerdts     UINT32                  i;
280bc36eafdSMike Gerdts 
281bc36eafdSMike Gerdts 
282bc36eafdSMike Gerdts     /* Always clear the line buffer before we read a new line */
283bc36eafdSMike Gerdts 
284bc36eafdSMike Gerdts     memset (Buffer, 0, BufferLength);
285bc36eafdSMike Gerdts 
286bc36eafdSMike Gerdts     /*
287bc36eafdSMike Gerdts      * This loop gets one character at a time (except for esc sequences)
288bc36eafdSMike Gerdts      * until a newline or error is detected.
289bc36eafdSMike Gerdts      *
290bc36eafdSMike Gerdts      * Note: Don't attempt to write terminal control ESC sequences, even
291bc36eafdSMike Gerdts      * though it makes certain things more difficult.
292bc36eafdSMike Gerdts      */
293bc36eafdSMike Gerdts     while (1)
294bc36eafdSMike Gerdts     {
295bc36eafdSMike Gerdts         if (EndOfLine >= (BufferLength - 1))
296bc36eafdSMike Gerdts         {
297bc36eafdSMike Gerdts             return (AE_BUFFER_OVERFLOW);
298bc36eafdSMike Gerdts         }
299bc36eafdSMike Gerdts 
300bc36eafdSMike Gerdts         InputChar = getchar ();
301bc36eafdSMike Gerdts         switch (InputChar)
302bc36eafdSMike Gerdts         {
303bc36eafdSMike Gerdts         default: /* This is the normal character case */
304bc36eafdSMike Gerdts 
305bc36eafdSMike Gerdts             /* Echo the character (at EOL) and copy it to the line buffer */
306bc36eafdSMike Gerdts 
307bc36eafdSMike Gerdts             if (EndOfLine == CursorPosition)
308bc36eafdSMike Gerdts             {
309bc36eafdSMike Gerdts                 putchar (InputChar);
310bc36eafdSMike Gerdts                 Buffer[EndOfLine] = (char) InputChar;
311bc36eafdSMike Gerdts 
312bc36eafdSMike Gerdts                 EndOfLine++;
313bc36eafdSMike Gerdts                 CursorPosition++;
314bc36eafdSMike Gerdts                 Buffer[EndOfLine] = 0;
315bc36eafdSMike Gerdts                 continue;
316bc36eafdSMike Gerdts             }
317bc36eafdSMike Gerdts 
318bc36eafdSMike Gerdts             /* Insert character into the middle of the buffer */
319bc36eafdSMike Gerdts 
320bc36eafdSMike Gerdts             memmove (&Buffer[CursorPosition + 1], &Buffer[CursorPosition],
321bc36eafdSMike Gerdts                 (EndOfLine - CursorPosition + 1));
322bc36eafdSMike Gerdts 
323bc36eafdSMike Gerdts             Buffer [CursorPosition] = (char) InputChar;
324bc36eafdSMike Gerdts             Buffer [EndOfLine + 1] = 0;
325bc36eafdSMike Gerdts 
326bc36eafdSMike Gerdts             /* Display the new part of line starting at the new character */
327bc36eafdSMike Gerdts 
328bc36eafdSMike Gerdts             fprintf (stdout, "%s", &Buffer[CursorPosition]);
329bc36eafdSMike Gerdts 
330bc36eafdSMike Gerdts             /* Restore cursor */
331bc36eafdSMike Gerdts 
332bc36eafdSMike Gerdts             ACPI_BACKUP_CURSOR (i, EndOfLine - CursorPosition);
333bc36eafdSMike Gerdts             CursorPosition++;
334bc36eafdSMike Gerdts             EndOfLine++;
335bc36eafdSMike Gerdts             continue;
336bc36eafdSMike Gerdts 
337bc36eafdSMike Gerdts         case _ASCII_DEL: /* Backspace key */
338bc36eafdSMike Gerdts 
339bc36eafdSMike Gerdts             if (!EndOfLine) /* Any characters on the command line? */
340bc36eafdSMike Gerdts             {
341bc36eafdSMike Gerdts                 continue;
342bc36eafdSMike Gerdts             }
343bc36eafdSMike Gerdts 
344bc36eafdSMike Gerdts             if (EndOfLine == CursorPosition) /* Erase the final character */
345bc36eafdSMike Gerdts             {
346bc36eafdSMike Gerdts                 ACPI_CLEAR_CHAR ();
347bc36eafdSMike Gerdts                 EndOfLine--;
348bc36eafdSMike Gerdts                 CursorPosition--;
349bc36eafdSMike Gerdts                 continue;
350bc36eafdSMike Gerdts             }
351bc36eafdSMike Gerdts 
352bc36eafdSMike Gerdts             if (!CursorPosition) /* Do not backup beyond start of line */
353bc36eafdSMike Gerdts             {
354bc36eafdSMike Gerdts                 continue;
355bc36eafdSMike Gerdts             }
356bc36eafdSMike Gerdts 
357bc36eafdSMike Gerdts             /* Remove the character from the line */
358bc36eafdSMike Gerdts 
359bc36eafdSMike Gerdts             memmove (&Buffer[CursorPosition - 1], &Buffer[CursorPosition],
360bc36eafdSMike Gerdts                 (EndOfLine - CursorPosition + 1));
361bc36eafdSMike Gerdts 
362bc36eafdSMike Gerdts             /* Display the new part of line starting at the new character */
363bc36eafdSMike Gerdts 
364bc36eafdSMike Gerdts             putchar (_ASCII_BACKSPACE);
365bc36eafdSMike Gerdts             fprintf (stdout, "%s ", &Buffer[CursorPosition - 1]);
366bc36eafdSMike Gerdts 
367bc36eafdSMike Gerdts             /* Restore cursor */
368bc36eafdSMike Gerdts 
369bc36eafdSMike Gerdts             ACPI_BACKUP_CURSOR (i, EndOfLine - CursorPosition + 1);
370bc36eafdSMike Gerdts             EndOfLine--;
371bc36eafdSMike Gerdts 
372bc36eafdSMike Gerdts             if (CursorPosition > 0)
373bc36eafdSMike Gerdts             {
374bc36eafdSMike Gerdts                 CursorPosition--;
375bc36eafdSMike Gerdts             }
376bc36eafdSMike Gerdts             continue;
377bc36eafdSMike Gerdts 
378bc36eafdSMike Gerdts         case _ASCII_NEWLINE: /* Normal exit case at end of command line */
379bc36eafdSMike Gerdts         case _ASCII_NUL:
380bc36eafdSMike Gerdts 
381bc36eafdSMike Gerdts             /* Return the number of bytes in the command line string */
382bc36eafdSMike Gerdts 
383bc36eafdSMike Gerdts             if (BytesRead)
384bc36eafdSMike Gerdts             {
385bc36eafdSMike Gerdts                 *BytesRead = EndOfLine;
386bc36eafdSMike Gerdts             }
387bc36eafdSMike Gerdts 
388bc36eafdSMike Gerdts             /* Echo, terminate string buffer, and exit */
389bc36eafdSMike Gerdts 
390bc36eafdSMike Gerdts             putchar (InputChar);
391bc36eafdSMike Gerdts             Buffer[EndOfLine] = 0;
392bc36eafdSMike Gerdts             return (AE_OK);
393bc36eafdSMike Gerdts 
394bc36eafdSMike Gerdts         case _ASCII_TAB:
395bc36eafdSMike Gerdts 
396bc36eafdSMike Gerdts             /* Ignore */
397bc36eafdSMike Gerdts 
398bc36eafdSMike Gerdts             continue;
399bc36eafdSMike Gerdts 
400bc36eafdSMike Gerdts         case EOF:
401bc36eafdSMike Gerdts 
402bc36eafdSMike Gerdts             return (AE_ERROR);
403bc36eafdSMike Gerdts 
404bc36eafdSMike Gerdts         case _ASCII_ESCAPE:
405bc36eafdSMike Gerdts 
406bc36eafdSMike Gerdts             /* Check for escape sequences of the form "ESC[x" */
407bc36eafdSMike Gerdts 
408bc36eafdSMike Gerdts             InputChar = getchar ();
409bc36eafdSMike Gerdts             if (InputChar != _ASCII_LEFT_BRACKET)
410bc36eafdSMike Gerdts             {
411bc36eafdSMike Gerdts                 continue; /* Ignore this ESC, does not have the '[' */
412bc36eafdSMike Gerdts             }
413bc36eafdSMike Gerdts 
414bc36eafdSMike Gerdts             /* Get the code following the ESC [ */
415bc36eafdSMike Gerdts 
416bc36eafdSMike Gerdts             InputChar = getchar (); /* Backup one character */
417bc36eafdSMike Gerdts             switch (InputChar)
418bc36eafdSMike Gerdts             {
419bc36eafdSMike Gerdts             case _ASCII_LEFT_ARROW:
420bc36eafdSMike Gerdts 
421bc36eafdSMike Gerdts                 if (CursorPosition > 0)
422bc36eafdSMike Gerdts                 {
423bc36eafdSMike Gerdts                     putchar (_ASCII_BACKSPACE);
424bc36eafdSMike Gerdts                     CursorPosition--;
425bc36eafdSMike Gerdts                 }
426bc36eafdSMike Gerdts                 continue;
427bc36eafdSMike Gerdts 
428bc36eafdSMike Gerdts             case _ASCII_RIGHT_ARROW:
429bc36eafdSMike Gerdts                 /*
430bc36eafdSMike Gerdts                  * Move one character forward. Do this without sending
431bc36eafdSMike Gerdts                  * ESC sequence to the terminal for max portability.
432bc36eafdSMike Gerdts                  */
433bc36eafdSMike Gerdts                 if (CursorPosition < EndOfLine)
434bc36eafdSMike Gerdts                 {
435bc36eafdSMike Gerdts                     /* Backup to start of line and print the entire line */
436bc36eafdSMike Gerdts 
437bc36eafdSMike Gerdts                     ACPI_BACKUP_CURSOR (i, CursorPosition);
438bc36eafdSMike Gerdts                     fprintf (stdout, "%s", Buffer);
439bc36eafdSMike Gerdts 
440bc36eafdSMike Gerdts                     /* Backup to where the cursor should be */
441bc36eafdSMike Gerdts 
442bc36eafdSMike Gerdts                     CursorPosition++;
443bc36eafdSMike Gerdts                     ACPI_BACKUP_CURSOR (i, EndOfLine - CursorPosition);
444bc36eafdSMike Gerdts                 }
445bc36eafdSMike Gerdts                 continue;
446bc36eafdSMike Gerdts 
447bc36eafdSMike Gerdts             case _ASCII_UP_ARROW:
448bc36eafdSMike Gerdts 
449bc36eafdSMike Gerdts                 /* If no commands available or at start of history list, ignore */
450bc36eafdSMike Gerdts 
451bc36eafdSMike Gerdts                 if (!CurrentCommandIndex)
452bc36eafdSMike Gerdts                 {
453bc36eafdSMike Gerdts                     continue;
454bc36eafdSMike Gerdts                 }
455bc36eafdSMike Gerdts 
456bc36eafdSMike Gerdts                 /* Manage our up/down progress */
457bc36eafdSMike Gerdts 
458bc36eafdSMike Gerdts                 if (CurrentCommandIndex > PreviousCommandIndex)
459bc36eafdSMike Gerdts                 {
460bc36eafdSMike Gerdts                     CurrentCommandIndex = PreviousCommandIndex;
461bc36eafdSMike Gerdts                 }
462bc36eafdSMike Gerdts 
463bc36eafdSMike Gerdts                 /* Get the historical command from the debugger */
464bc36eafdSMike Gerdts 
465bc36eafdSMike Gerdts                 NextCommand = AcpiDbGetHistoryByIndex (CurrentCommandIndex);
466bc36eafdSMike Gerdts                 if (!NextCommand)
467bc36eafdSMike Gerdts                 {
468bc36eafdSMike Gerdts                     return (AE_ERROR);
469bc36eafdSMike Gerdts                 }
470bc36eafdSMike Gerdts 
471bc36eafdSMike Gerdts                 /* Make this the active command and echo it */
472bc36eafdSMike Gerdts 
473bc36eafdSMike Gerdts                 AcpiAcClearLine (EndOfLine, CursorPosition);
474bc36eafdSMike Gerdts                 strcpy (Buffer, NextCommand);
475bc36eafdSMike Gerdts                 fprintf (stdout, "%s", Buffer);
476bc36eafdSMike Gerdts                 EndOfLine = CursorPosition = strlen (Buffer);
477bc36eafdSMike Gerdts 
478bc36eafdSMike Gerdts                 PreviousCommandIndex = CurrentCommandIndex;
479bc36eafdSMike Gerdts                 CurrentCommandIndex--;
480bc36eafdSMike Gerdts                 continue;
481bc36eafdSMike Gerdts 
482bc36eafdSMike Gerdts             case _ASCII_DOWN_ARROW:
483bc36eafdSMike Gerdts 
484bc36eafdSMike Gerdts                 if (!MaxCommandIndex) /* Any commands available? */
485bc36eafdSMike Gerdts                 {
486bc36eafdSMike Gerdts                     continue;
487bc36eafdSMike Gerdts                 }
488bc36eafdSMike Gerdts 
489bc36eafdSMike Gerdts                 /* Manage our up/down progress */
490bc36eafdSMike Gerdts 
491bc36eafdSMike Gerdts                 if (CurrentCommandIndex < PreviousCommandIndex)
492bc36eafdSMike Gerdts                 {
493bc36eafdSMike Gerdts                     CurrentCommandIndex = PreviousCommandIndex;
494bc36eafdSMike Gerdts                 }
495bc36eafdSMike Gerdts 
496bc36eafdSMike Gerdts                 /* If we are the end of the history list, output a clear new line */
497bc36eafdSMike Gerdts 
498bc36eafdSMike Gerdts                 if ((CurrentCommandIndex + 1) > MaxCommandIndex)
499bc36eafdSMike Gerdts                 {
500bc36eafdSMike Gerdts                     AcpiAcClearLine (EndOfLine, CursorPosition);
501bc36eafdSMike Gerdts                     EndOfLine = CursorPosition = 0;
502bc36eafdSMike Gerdts                     PreviousCommandIndex = CurrentCommandIndex;
503bc36eafdSMike Gerdts                     continue;
504bc36eafdSMike Gerdts                 }
505bc36eafdSMike Gerdts 
506bc36eafdSMike Gerdts                 PreviousCommandIndex = CurrentCommandIndex;
507bc36eafdSMike Gerdts                 CurrentCommandIndex++;
508bc36eafdSMike Gerdts 
509bc36eafdSMike Gerdts                  /* Get the historical command from the debugger */
510bc36eafdSMike Gerdts 
511bc36eafdSMike Gerdts                 NextCommand = AcpiDbGetHistoryByIndex (CurrentCommandIndex);
512bc36eafdSMike Gerdts                 if (!NextCommand)
513bc36eafdSMike Gerdts                 {
514bc36eafdSMike Gerdts                     return (AE_ERROR);
515bc36eafdSMike Gerdts                 }
516bc36eafdSMike Gerdts 
517bc36eafdSMike Gerdts                 /* Make this the active command and echo it */
518bc36eafdSMike Gerdts 
519bc36eafdSMike Gerdts                 AcpiAcClearLine (EndOfLine, CursorPosition);
520bc36eafdSMike Gerdts                 strcpy (Buffer, NextCommand);
521bc36eafdSMike Gerdts                 fprintf (stdout, "%s", Buffer);
522bc36eafdSMike Gerdts                 EndOfLine = CursorPosition = strlen (Buffer);
523bc36eafdSMike Gerdts                 continue;
524bc36eafdSMike Gerdts 
525bc36eafdSMike Gerdts             case 0x31:
526bc36eafdSMike Gerdts             case 0x32:
527bc36eafdSMike Gerdts             case 0x33:
528bc36eafdSMike Gerdts             case 0x34:
529bc36eafdSMike Gerdts             case 0x35:
530bc36eafdSMike Gerdts             case 0x36:
531bc36eafdSMike Gerdts                 /*
532bc36eafdSMike Gerdts                  * Ignore the various keys like insert/delete/home/end, etc.
533bc36eafdSMike Gerdts                  * But we must eat the final character of the ESC sequence.
534bc36eafdSMike Gerdts                  */
535bc36eafdSMike Gerdts                 InputChar = getchar ();
536bc36eafdSMike Gerdts                 continue;
537bc36eafdSMike Gerdts 
538bc36eafdSMike Gerdts             default:
539bc36eafdSMike Gerdts 
540bc36eafdSMike Gerdts                 /* Ignore random escape sequences that we don't care about */
541bc36eafdSMike Gerdts 
542bc36eafdSMike Gerdts                 continue;
543bc36eafdSMike Gerdts             }
544bc36eafdSMike Gerdts             continue;
545bc36eafdSMike Gerdts         }
546bc36eafdSMike Gerdts     }
547bc36eafdSMike Gerdts }
548