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📄 brac.c(2.18 KB)
📄 ch.c(18.37 KB)
📄 charset.c(17.3 KB)
📄 charset.h(717 B)
📄 cmd.h(4.42 KB)
📄 cmdbuf.c(32.21 KB)
📄 command.c(36.63 KB)
📄 compose.uni(10.17 KB)
📄 cvt.c(2.49 KB)
📄 decode.c(20.81 KB)
📄 edit.c(16.68 KB)
📄 filename.c(19.65 KB)
📄 fmt.uni(712 B)
📄 forwback.c(9.77 KB)
📄 funcs.h(17.56 KB)
📄 help.c(49.78 KB)
📄 ifile.c(7.39 KB)
📄 input.c(8.82 KB)
📄 jump.c(6.54 KB)
📄 less.h(12.74 KB)
📄 less.hlp(12.19 KB)
📄 less.nro(69.08 KB)
📄 lessecho.c(4.82 KB)
📄 lessecho.nro(1.5 KB)
📄 lesskey.c(17.99 KB)
📄 lesskey.h(813 B)
📄 lesskey.nro(9.15 KB)
📄 lglob.h(2.98 KB)
📄 line.c(28 KB)
📄 linenum.c(10.36 KB)
📄 lsystem.c(7.17 KB)
📄 main.c(8.07 KB)
📄 mark.c(8.28 KB)
📄 mkutable(2.75 KB)
📄 optfunc.c(13.61 KB)
📄 option.c(13.89 KB)
📄 option.h(2 KB)
📄 opttbl.c(17.14 KB)
📄 os.c(6.2 KB)
📄 output.c(13 KB)
📄 pattern.c(8.55 KB)
📄 pattern.h(1.54 KB)
📄 pckeys.h(898 B)
📄 position.c(5.13 KB)
📄 position.h(414 B)
📄 prompt.c(11.98 KB)
📄 regexp.c(27.74 KB)
📄 regexp.h(973 B)
📄 screen.c(53.03 KB)
📄 scrsize.c(3.06 KB)
📄 search.c(35.45 KB)
📄 signal.c(4.63 KB)
📄 tags.c(15.73 KB)
📄 ttyin.c(4.12 KB)
📄 ubin.uni(602 B)
📄 version.c(46.22 KB)
📄 wide.uni(3.52 KB)

Editing: ttyin.c

/*
 * Copyright (C) 1984-2020  Mark Nudelman
 *
 * You may distribute under the terms of either the GNU General Public
 * License or the Less License, as specified in the README file.
 *
 * For more information, see the README file.
 */

/*
 * Routines dealing with getting input from the keyboard (i.e. from the user).
 */

#include "less.h"
#if OS2
#include "cmd.h"
#include "pckeys.h"
#endif
#if MSDOS_COMPILER==WIN32C
#define WIN32_LEAN_AND_MEAN
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x400
#endif
#include <windows.h>
public DWORD console_mode;
public HANDLE tty;
#else
public int tty;
#endif
extern int sigs;
extern int utf_mode;
extern int wheel_lines;

/*
 * Open keyboard for input.
 */
	public void
open_getchr(VOID_PARAM)
{
#if MSDOS_COMPILER==WIN32C
	/* Need this to let child processes inherit our console handle */
	SECURITY_ATTRIBUTES sa;
	memset(&sa, 0, sizeof(SECURITY_ATTRIBUTES));
	sa.nLength = sizeof(SECURITY_ATTRIBUTES);
	sa.bInheritHandle = TRUE;
	tty = CreateFile("CONIN$", GENERIC_READ | GENERIC_WRITE,
			FILE_SHARE_READ, &sa, 
			OPEN_EXISTING, 0L, NULL);
	GetConsoleMode(tty, &console_mode);
	/* Make sure we get Ctrl+C events. */
	SetConsoleMode(tty, ENABLE_PROCESSED_INPUT | ENABLE_MOUSE_INPUT);
#else
#if MSDOS_COMPILER
	extern int fd0;
	/*
	 * Open a new handle to CON: in binary mode 
	 * for unbuffered keyboard read.
	 */
	 fd0 = dup(0);
	 close(0);
	 tty = open("CON", OPEN_READ);
#if MSDOS_COMPILER==DJGPPC
	/*
	 * Setting stdin to binary causes Ctrl-C to not
	 * raise SIGINT.  We must undo that side-effect.
	 */
	(void) __djgpp_set_ctrl_c(1);
#endif
#else
	/*
	 * Try /dev/tty.
	 * If that doesn't work, use file descriptor 2,
	 * which in Unix is usually attached to the screen,
	 * but also usually lets you read from the keyboard.
	 */
#if OS2
	/* The __open() system call translates "/dev/tty" to "con". */
	tty = __open("/dev/tty", OPEN_READ);
#else
	tty = open("/dev/tty", OPEN_READ);
#endif
	if (tty < 0)
		tty = 2;
#endif
#endif
}

/*
 * Close the keyboard.
 */
	public void
close_getchr(VOID_PARAM)
{
#if MSDOS_COMPILER==WIN32C
	SetConsoleMode(tty, console_mode);
	CloseHandle(tty);
#endif
}

#if MSDOS_COMPILER==WIN32C
/*
 * Close the pipe, restoring the keyboard (CMD resets it, losing the mouse).
 */
	int
pclose(f)
	FILE *f;
{
	int result;

result = _pclose(f);
	SetConsoleMode(tty, ENABLE_PROCESSED_INPUT | ENABLE_MOUSE_INPUT);
	return result;
}
#endif

/*
 * Get the number of lines to scroll when mouse wheel is moved.
 */
	public int
default_wheel_lines(VOID_PARAM)
{
	int lines = 1;
#if MSDOS_COMPILER==WIN32C
	if (SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, &lines, 0))
	{
		if (lines == WHEEL_PAGESCROLL)
			lines = 3;
	}
#endif
	return lines;
}

/*
 * Get a character from the keyboard.
 */
	public int
getchr(VOID_PARAM)
{
	char c;
	int result;

do
	{
#if MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC
		/*
		 * In raw read, we don't see ^C so look here for it.
		 */
		flush();
#if MSDOS_COMPILER==WIN32C
		if (ABORT_SIGS())
			return (READ_INTR);
		c = WIN32getch();
#else
		c = getch();
#endif
		result = 1;
		if (c == '\003')
			return (READ_INTR);
#else
		{
			unsigned char uc;
			result = iread(tty, &uc, sizeof(char));
			c = (char) uc;
		}
		if (result == READ_INTR)
			return (READ_INTR);
		if (result < 0)
		{
			/*
			 * Don't call error() here,
			 * because error calls getchr!
			 */
			quit(QUIT_ERROR);
		}
#endif
#if 0 /* allow entering arbitrary hex chars for testing */
		/* ctrl-A followed by two hex chars makes a byte */
	{
		static int hex_in = 0;
		static int hex_value = 0;
		if (c == CONTROL('A'))
		{
			hex_in = 2;
			result = 0;
			continue;
		}
		if (hex_in > 0)
		{
			int v;
			if (c >= '0' && c <= '9')
				v = c - '0';
			else if (c >= 'a' && c <= 'f')
				v = c - 'a' + 10;
			else if (c >= 'A' && c <= 'F')
				v = c - 'A' + 10;
			else
				v = 0;
			hex_value = (hex_value << 4) | v;
			if (--hex_in > 0)
			{
				result = 0;
				continue;
			}
			c = hex_value;
		}
	}
#endif
		/*
		 * Various parts of the program cannot handle
		 * an input character of '\0'.
		 * If a '\0' was actually typed, convert it to '\340' here.
		 */
		if (c == '\0')
			c = '\340';
	} while (result != 1);

return (c & 0xFF);
}

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Editing: ttyin.c

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