version 1.1.1.1, 1996/09/21 05:39:43 |
version 1.1.1.2, 2003/04/13 18:21:21 |
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/* |
/* |
* Copyright (c) 1984,1985,1989,1994,1995 Mark Nudelman |
* Copyright (C) 1984-2002 Mark Nudelman |
* All rights reserved. |
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* |
* |
* Redistribution and use in source and binary forms, with or without |
* You may distribute under the terms of either the GNU General Public |
* modification, are permitted provided that the following conditions |
* License or the Less License, as specified in the README file. |
* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice in the documentation and/or other materials provided with |
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* the distribution. |
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* |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY |
* For more information about less, or for information on how to |
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
* contact the author, see the README file. |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
*/ |
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*/ |
*/ |
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#include "less.h" |
#include "less.h" |
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#if OS2 |
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#include "cmd.h" |
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#include "pckeys.h" |
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#endif |
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#if MSDOS_COMPILER==WIN32C |
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#include "windows.h" |
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extern char WIN32getch(); |
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static DWORD console_mode; |
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#endif |
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static int tty; |
public int tty; |
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extern int sigs; |
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/* |
/* |
* Open keyboard for input. |
* Open keyboard for input. |
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public void |
public void |
open_getchr() |
open_getchr() |
{ |
{ |
#if MSOFTC || OS2 |
#if MSDOS_COMPILER==WIN32C |
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/* Need this to let child processes inherit our console handle */ |
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SECURITY_ATTRIBUTES sa; |
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memset(&sa, 0, sizeof(SECURITY_ATTRIBUTES)); |
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sa.nLength = sizeof(SECURITY_ATTRIBUTES); |
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sa.bInheritHandle = TRUE; |
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tty = (int) CreateFile("CONIN$", GENERIC_READ, |
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FILE_SHARE_READ, &sa, |
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OPEN_EXISTING, 0L, NULL); |
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GetConsoleMode((HANDLE)tty, &console_mode); |
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/* Make sure we get Ctrl+C events. */ |
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SetConsoleMode((HANDLE)tty, ENABLE_PROCESSED_INPUT); |
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#else |
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#if MSDOS_COMPILER |
extern int fd0; |
extern int fd0; |
/* |
/* |
* Open a new handle to CON: in binary mode |
* Open a new handle to CON: in binary mode |
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*/ |
*/ |
fd0 = dup(0); |
fd0 = dup(0); |
close(0); |
close(0); |
tty = OPEN_TTYIN(); |
tty = open("CON", OPEN_READ); |
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#if MSDOS_COMPILER==DJGPPC |
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/* |
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* Setting stdin to binary causes Ctrl-C to not |
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* raise SIGINT. We must undo that side-effect. |
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*/ |
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(void) __djgpp_set_ctrl_c(1); |
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#endif |
#else |
#else |
/* |
/* |
* Try /dev/tty. |
* Try /dev/tty. |
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* which in Unix is usually attached to the screen, |
* which in Unix is usually attached to the screen, |
* but also usually lets you read from the keyboard. |
* but also usually lets you read from the keyboard. |
*/ |
*/ |
tty = OPEN_TTYIN(); |
#if OS2 |
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/* The __open() system call translates "/dev/tty" to "con". */ |
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tty = __open("/dev/tty", OPEN_READ); |
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#else |
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tty = open("/dev/tty", OPEN_READ); |
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#endif |
if (tty < 0) |
if (tty < 0) |
tty = 2; |
tty = 2; |
#endif |
#endif |
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#endif |
} |
} |
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/* |
/* |
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* Close the keyboard. |
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*/ |
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public void |
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close_getchr() |
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{ |
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#if MSDOS_COMPILER==WIN32C |
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SetConsoleMode((HANDLE)tty, console_mode); |
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CloseHandle((HANDLE)tty); |
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#endif |
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} |
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/* |
* Get a character from the keyboard. |
* Get a character from the keyboard. |
*/ |
*/ |
public int |
public int |
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do |
do |
{ |
{ |
#if MSOFTC |
#if MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC |
/* |
/* |
* In raw read, we don't see ^C so look here for it. |
* In raw read, we don't see ^C so look here for it. |
*/ |
*/ |
flush(); |
flush(); |
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#if MSDOS_COMPILER==WIN32C |
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if (ABORT_SIGS()) |
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return (READ_INTR); |
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c = WIN32getch(tty); |
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#else |
c = getch(); |
c = getch(); |
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#endif |
result = 1; |
result = 1; |
if (c == '\003') |
if (c == '\003') |
return (READ_INTR); |
return (READ_INTR); |
#else |
#else |
#if OS2 |
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flush(); |
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while (_read_kbd(0, 0, 0) != -1) |
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continue; |
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if ((c = _read_kbd(0, 1, 0)) == -1) |
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return (READ_INTR); |
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result = 1; |
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#else |
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result = iread(tty, &c, sizeof(char)); |
result = iread(tty, &c, sizeof(char)); |
if (result == READ_INTR) |
if (result == READ_INTR) |
return (READ_INTR); |
return (READ_INTR); |
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*/ |
*/ |
quit(QUIT_ERROR); |
quit(QUIT_ERROR); |
} |
} |
#endif |
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#endif |
#endif |
/* |
/* |
* Various parts of the program cannot handle |
* Various parts of the program cannot handle |