440 lines
14 KiB
C
440 lines
14 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: acgetline - local line editing
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2016, Intel Corp.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions, and the following disclaimer,
|
|
* without modification.
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
|
* substantially similar to the "NO WARRANTY" disclaimer below
|
|
* ("Disclaimer") and any redistribution must be conditioned upon
|
|
* including a substantially similar Disclaimer requirement for further
|
|
* binary redistribution.
|
|
* 3. Neither the names of the above-listed copyright holders nor the names
|
|
* of any contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* NO WARRANTY
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGES.
|
|
*/
|
|
|
|
#include <contrib/dev/acpica/include/acpi.h>
|
|
#include <contrib/dev/acpica/include/accommon.h>
|
|
#include <contrib/dev/acpica/include/amlcode.h>
|
|
#include <contrib/dev/acpica/include/acparser.h>
|
|
#include <contrib/dev/acpica/include/acdebug.h>
|
|
|
|
/*
|
|
* This is an os-independent implementation of line-editing services needed
|
|
* by the AcpiExec utility. It uses getchar() and putchar() and the existing
|
|
* history support provided by the AML debugger. It assumes that the terminal
|
|
* is in the correct line-editing mode such as raw and noecho. The OSL
|
|
* interface AcpiOsInitialize should do this. AcpiOsTerminate should put the
|
|
* terminal back into the original mode.
|
|
*/
|
|
#define _COMPONENT ACPI_OS_SERVICES
|
|
ACPI_MODULE_NAME ("acgetline")
|
|
|
|
|
|
/* Local prototypes */
|
|
|
|
static void
|
|
AcpiAcClearLine (
|
|
UINT32 EndOfLine,
|
|
UINT32 CursorPosition);
|
|
|
|
/* Various ASCII constants */
|
|
|
|
#define _ASCII_NUL 0
|
|
#define _ASCII_BACKSPACE 0x08
|
|
#define _ASCII_TAB 0x09
|
|
#define _ASCII_ESCAPE 0x1B
|
|
#define _ASCII_SPACE 0x20
|
|
#define _ASCII_LEFT_BRACKET 0x5B
|
|
#define _ASCII_DEL 0x7F
|
|
#define _ASCII_UP_ARROW 'A'
|
|
#define _ASCII_DOWN_ARROW 'B'
|
|
#define _ASCII_RIGHT_ARROW 'C'
|
|
#define _ASCII_LEFT_ARROW 'D'
|
|
#define _ASCII_NEWLINE '\n'
|
|
|
|
extern UINT32 AcpiGbl_NextCmdNum;
|
|
|
|
/* Erase a single character on the input command line */
|
|
|
|
#define ACPI_CLEAR_CHAR() \
|
|
putchar (_ASCII_BACKSPACE); \
|
|
putchar (_ASCII_SPACE); \
|
|
putchar (_ASCII_BACKSPACE);
|
|
|
|
/* Backup cursor by Count positions */
|
|
|
|
#define ACPI_BACKUP_CURSOR(i, Count) \
|
|
for (i = 0; i < (Count); i++) \
|
|
{putchar (_ASCII_BACKSPACE);}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiAcClearLine
|
|
*
|
|
* PARAMETERS: EndOfLine - Current end-of-line index
|
|
* CursorPosition - Current cursor position within line
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Clear the entire command line the hard way, but probably the
|
|
* most portable.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
static void
|
|
AcpiAcClearLine (
|
|
UINT32 EndOfLine,
|
|
UINT32 CursorPosition)
|
|
{
|
|
UINT32 i;
|
|
|
|
|
|
if (CursorPosition < EndOfLine)
|
|
{
|
|
/* Clear line from current position to end of line */
|
|
|
|
for (i = 0; i < (EndOfLine - CursorPosition); i++)
|
|
{
|
|
putchar (' ');
|
|
}
|
|
}
|
|
|
|
/* Clear the entire line */
|
|
|
|
for (; EndOfLine > 0; EndOfLine--)
|
|
{
|
|
ACPI_CLEAR_CHAR ();
|
|
}
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiOsGetLine
|
|
*
|
|
* PARAMETERS: Buffer - Where to return the command line
|
|
* BufferLength - Maximum length of Buffer
|
|
* BytesRead - Where the actual byte count is returned
|
|
*
|
|
* RETURN: Status and actual bytes read
|
|
*
|
|
* DESCRIPTION: Get the next input line from the terminal. NOTE: terminal
|
|
* is expected to be in a mode that supports line-editing (raw,
|
|
* noecho). This function is intended to be very portable. Also,
|
|
* it uses the history support implemented in the AML debugger.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiOsGetLine (
|
|
char *Buffer,
|
|
UINT32 BufferLength,
|
|
UINT32 *BytesRead)
|
|
{
|
|
char *NextCommand;
|
|
UINT32 MaxCommandIndex = AcpiGbl_NextCmdNum - 1;
|
|
UINT32 CurrentCommandIndex = MaxCommandIndex;
|
|
UINT32 PreviousCommandIndex = MaxCommandIndex;
|
|
int InputChar;
|
|
UINT32 CursorPosition = 0;
|
|
UINT32 EndOfLine = 0;
|
|
UINT32 i;
|
|
|
|
|
|
/* Always clear the line buffer before we read a new line */
|
|
|
|
memset (Buffer, 0, BufferLength);
|
|
|
|
/*
|
|
* This loop gets one character at a time (except for esc sequences)
|
|
* until a newline or error is detected.
|
|
*
|
|
* Note: Don't attempt to write terminal control ESC sequences, even
|
|
* though it makes certain things more difficult.
|
|
*/
|
|
while (1)
|
|
{
|
|
if (EndOfLine >= (BufferLength - 1))
|
|
{
|
|
return (AE_BUFFER_OVERFLOW);
|
|
}
|
|
|
|
InputChar = getchar ();
|
|
switch (InputChar)
|
|
{
|
|
default: /* This is the normal character case */
|
|
|
|
/* Echo the character (at EOL) and copy it to the line buffer */
|
|
|
|
if (EndOfLine == CursorPosition)
|
|
{
|
|
putchar (InputChar);
|
|
Buffer[EndOfLine] = (char) InputChar;
|
|
|
|
EndOfLine++;
|
|
CursorPosition++;
|
|
Buffer[EndOfLine] = 0;
|
|
continue;
|
|
}
|
|
|
|
/* Insert character into the middle of the buffer */
|
|
|
|
memmove (&Buffer[CursorPosition + 1], &Buffer[CursorPosition],
|
|
(EndOfLine - CursorPosition + 1));
|
|
|
|
Buffer [CursorPosition] = (char) InputChar;
|
|
Buffer [EndOfLine + 1] = 0;
|
|
|
|
/* Display the new part of line starting at the new character */
|
|
|
|
fprintf (stdout, "%s", &Buffer[CursorPosition]);
|
|
|
|
/* Restore cursor */
|
|
|
|
ACPI_BACKUP_CURSOR (i, EndOfLine - CursorPosition);
|
|
CursorPosition++;
|
|
EndOfLine++;
|
|
continue;
|
|
|
|
case _ASCII_DEL: /* Backspace key */
|
|
|
|
if (!EndOfLine) /* Any characters on the command line? */
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (EndOfLine == CursorPosition) /* Erase the final character */
|
|
{
|
|
ACPI_CLEAR_CHAR ();
|
|
EndOfLine--;
|
|
CursorPosition--;
|
|
continue;
|
|
}
|
|
|
|
if (!CursorPosition) /* Do not backup beyond start of line */
|
|
{
|
|
continue;
|
|
}
|
|
|
|
/* Remove the character from the line */
|
|
|
|
memmove (&Buffer[CursorPosition - 1], &Buffer[CursorPosition],
|
|
(EndOfLine - CursorPosition + 1));
|
|
|
|
/* Display the new part of line starting at the new character */
|
|
|
|
putchar (_ASCII_BACKSPACE);
|
|
fprintf (stdout, "%s ", &Buffer[CursorPosition - 1]);
|
|
|
|
/* Restore cursor */
|
|
|
|
ACPI_BACKUP_CURSOR (i, EndOfLine - CursorPosition + 1);
|
|
EndOfLine--;
|
|
|
|
if (CursorPosition > 0)
|
|
{
|
|
CursorPosition--;
|
|
}
|
|
continue;
|
|
|
|
case _ASCII_NEWLINE: /* Normal exit case at end of command line */
|
|
case _ASCII_NUL:
|
|
|
|
/* Return the number of bytes in the command line string */
|
|
|
|
if (BytesRead)
|
|
{
|
|
*BytesRead = EndOfLine;
|
|
}
|
|
|
|
/* Echo, terminate string buffer, and exit */
|
|
|
|
putchar (InputChar);
|
|
Buffer[EndOfLine] = 0;
|
|
return (AE_OK);
|
|
|
|
case _ASCII_TAB:
|
|
|
|
/* Ignore */
|
|
|
|
continue;
|
|
|
|
case EOF:
|
|
|
|
return (AE_ERROR);
|
|
|
|
case _ASCII_ESCAPE:
|
|
|
|
/* Check for escape sequences of the form "ESC[x" */
|
|
|
|
InputChar = getchar ();
|
|
if (InputChar != _ASCII_LEFT_BRACKET)
|
|
{
|
|
continue; /* Ignore this ESC, does not have the '[' */
|
|
}
|
|
|
|
/* Get the code following the ESC [ */
|
|
|
|
InputChar = getchar (); /* Backup one character */
|
|
switch (InputChar)
|
|
{
|
|
case _ASCII_LEFT_ARROW:
|
|
|
|
if (CursorPosition > 0)
|
|
{
|
|
putchar (_ASCII_BACKSPACE);
|
|
CursorPosition--;
|
|
}
|
|
continue;
|
|
|
|
case _ASCII_RIGHT_ARROW:
|
|
/*
|
|
* Move one character forward. Do this without sending
|
|
* ESC sequence to the terminal for max portability.
|
|
*/
|
|
if (CursorPosition < EndOfLine)
|
|
{
|
|
/* Backup to start of line and print the entire line */
|
|
|
|
ACPI_BACKUP_CURSOR (i, CursorPosition);
|
|
fprintf (stdout, "%s", Buffer);
|
|
|
|
/* Backup to where the cursor should be */
|
|
|
|
CursorPosition++;
|
|
ACPI_BACKUP_CURSOR (i, EndOfLine - CursorPosition);
|
|
}
|
|
continue;
|
|
|
|
case _ASCII_UP_ARROW:
|
|
|
|
/* If no commands available or at start of history list, ignore */
|
|
|
|
if (!CurrentCommandIndex)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
/* Manage our up/down progress */
|
|
|
|
if (CurrentCommandIndex > PreviousCommandIndex)
|
|
{
|
|
CurrentCommandIndex = PreviousCommandIndex;
|
|
}
|
|
|
|
/* Get the historical command from the debugger */
|
|
|
|
NextCommand = AcpiDbGetHistoryByIndex (CurrentCommandIndex);
|
|
if (!NextCommand)
|
|
{
|
|
return (AE_ERROR);
|
|
}
|
|
|
|
/* Make this the active command and echo it */
|
|
|
|
AcpiAcClearLine (EndOfLine, CursorPosition);
|
|
strcpy (Buffer, NextCommand);
|
|
fprintf (stdout, "%s", Buffer);
|
|
EndOfLine = CursorPosition = strlen (Buffer);
|
|
|
|
PreviousCommandIndex = CurrentCommandIndex;
|
|
CurrentCommandIndex--;
|
|
continue;
|
|
|
|
case _ASCII_DOWN_ARROW:
|
|
|
|
if (!MaxCommandIndex) /* Any commands available? */
|
|
{
|
|
continue;
|
|
}
|
|
|
|
/* Manage our up/down progress */
|
|
|
|
if (CurrentCommandIndex < PreviousCommandIndex)
|
|
{
|
|
CurrentCommandIndex = PreviousCommandIndex;
|
|
}
|
|
|
|
/* If we are the end of the history list, output a clear new line */
|
|
|
|
if ((CurrentCommandIndex + 1) > MaxCommandIndex)
|
|
{
|
|
AcpiAcClearLine (EndOfLine, CursorPosition);
|
|
EndOfLine = CursorPosition = 0;
|
|
PreviousCommandIndex = CurrentCommandIndex;
|
|
continue;
|
|
}
|
|
|
|
PreviousCommandIndex = CurrentCommandIndex;
|
|
CurrentCommandIndex++;
|
|
|
|
/* Get the historical command from the debugger */
|
|
|
|
NextCommand = AcpiDbGetHistoryByIndex (CurrentCommandIndex);
|
|
if (!NextCommand)
|
|
{
|
|
return (AE_ERROR);
|
|
}
|
|
|
|
/* Make this the active command and echo it */
|
|
|
|
AcpiAcClearLine (EndOfLine, CursorPosition);
|
|
strcpy (Buffer, NextCommand);
|
|
fprintf (stdout, "%s", Buffer);
|
|
EndOfLine = CursorPosition = strlen (Buffer);
|
|
continue;
|
|
|
|
case 0x31:
|
|
case 0x32:
|
|
case 0x33:
|
|
case 0x34:
|
|
case 0x35:
|
|
case 0x36:
|
|
/*
|
|
* Ignore the various keys like insert/delete/home/end, etc.
|
|
* But we must eat the final character of the ESC sequence.
|
|
*/
|
|
InputChar = getchar ();
|
|
continue;
|
|
|
|
default:
|
|
|
|
/* Ignore random escape sequences that we don't care about */
|
|
|
|
continue;
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
}
|