/* vi: set sw=8 ts=8: *//* * tiny vi.c: A small 'vi' clone * Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com> * *  This program is free software; you can redistribute it and/or modify *  it under the terms of the GNU General Public License as published by *  the Free Software Foundation; either version 2 of the License, or *  (at your option) any later version. * *  This program is distributed in the hope that it will be useful, *  but WITHOUT ANY WARRANTY; without even the implied warranty of *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the *  GNU General Public License for more details. * *  You should have received a copy of the GNU General Public License *  along with this program; if not, write to the Free Software *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */static const char vi_Version[] =	"$Id: vi.c,v 1.19 2002/10/26 10:19:07 andersen Exp $";/* * To compile for standalone use: *	gcc -Wall -Os -s -DSTANDALONE -o vi vi.c *	  or *	gcc -Wall -Os -s -DSTANDALONE -DBB_FEATURE_VI_CRASHME -o vi vi.c		# include testing features *	strip vi *//* * Things To Do: *	EXINIT *	$HOME/.exrc  and  ./.exrc *	add magic to search	/foo.*bar *	add :help command *	:map macros *	how about mode lines:   vi: set sw=8 ts=8: *	if mark[] values were line numbers rather than pointers *	   it would be easier to change the mark when add/delete lines *	More intelligence in refresh() *	":r !cmd"  and  "!cmd"  to filter text through an external command *	A true "undo" facility *	An "ex" line oriented mode- maybe using "cmdedit" *///----  Feature --------------  Bytes to immplement#ifdef STANDALONE#define vi_main			main#define BB_FEATURE_VI_COLON	// 4288#define BB_FEATURE_VI_YANKMARK	// 1408#define BB_FEATURE_VI_SEARCH	// 1088#define BB_FEATURE_VI_USE_SIGNALS	// 1056#define BB_FEATURE_VI_DOT_CMD	//  576#define BB_FEATURE_VI_READONLY	//  128#define BB_FEATURE_VI_SETOPTS	//  576#define BB_FEATURE_VI_SET	//  224#define BB_FEATURE_VI_WIN_RESIZE	//  256  WIN_RESIZE// To test editor using CRASHME://    vi -C filename// To stop testing, wait until all to text[] is deleted, or//    Ctrl-Z and kill -9 %1// while in the editor Ctrl-T will toggle the crashme function on and off.//#define BB_FEATURE_VI_CRASHME		// randomly pick commands to execute#endif							/* STANDALONE */#include <stdio.h>#include <stdlib.h>#include <string.h>#include <termios.h>#include <unistd.h>#include <sys/ioctl.h>#include <sys/time.h>#include <sys/types.h>#include <sys/stat.h>#include <time.h>#include <fcntl.h>#include <signal.h>#include <setjmp.h>#include <regex.h>#include <ctype.h>#include <assert.h>#include <errno.h>#include <stdarg.h>#ifndef STANDALONE#include "busybox.h"#endif							/* STANDALONE */#ifndef TRUE#define TRUE			((int)1)#define FALSE			((int)0)#endif							/* TRUE */#define MAX_SCR_COLS		BUFSIZ// Misc. non-Ascii keys that report an escape sequence#define VI_K_UP			128	// cursor key Up#define VI_K_DOWN		129	// cursor key Down#define VI_K_RIGHT		130	// Cursor Key Right#define VI_K_LEFT		131	// cursor key Left#define VI_K_HOME		132	// Cursor Key Home#define VI_K_END		133	// Cursor Key End#define VI_K_INSERT		134	// Cursor Key Insert#define VI_K_PAGEUP		135	// Cursor Key Page Up#define VI_K_PAGEDOWN		136	// Cursor Key Page Down#define VI_K_FUN1		137	// Function Key F1#define VI_K_FUN2		138	// Function Key F2#define VI_K_FUN3		139	// Function Key F3#define VI_K_FUN4		140	// Function Key F4#define VI_K_FUN5		141	// Function Key F5#define VI_K_FUN6		142	// Function Key F6#define VI_K_FUN7		143	// Function Key F7#define VI_K_FUN8		144	// Function Key F8#define VI_K_FUN9		145	// Function Key F9#define VI_K_FUN10		146	// Function Key F10#define VI_K_FUN11		147	// Function Key F11#define VI_K_FUN12		148	// Function Key F12static const int YANKONLY = FALSE;static const int YANKDEL = TRUE;static const int FORWARD = 1;	// code depends on "1"  for array indexstatic const int BACK = -1;	// code depends on "-1" for array indexstatic const int LIMITED = 0;	// how much of text[] in char_searchstatic const int FULL = 1;	// how much of text[] in char_searchstatic const int S_BEFORE_WS = 1;	// used in skip_thing() for moving "dot"static const int S_TO_WS = 2;		// used in skip_thing() for moving "dot"static const int S_OVER_WS = 3;		// used in skip_thing() for moving "dot"static const int S_END_PUNCT = 4;	// used in skip_thing() for moving "dot"static const int S_END_ALNUM = 5;	// used in skip_thing() for moving "dot"typedef unsigned char Byte;static int editing;		// >0 while we are editing a filestatic int cmd_mode;		// 0=command  1=insertstatic int file_modified;	// buffer contents changedstatic int err_method;		// indicate error with beep or flashstatic int fn_start;		// index of first cmd line file namestatic int save_argc;		// how many file names on cmd linestatic int cmdcnt;		// repetition countstatic fd_set rfds;		// use select() for small sleepsstatic struct timeval tv;	// use select() for small sleepsstatic char erase_char;		// the users erase characterstatic int rows, columns;	// the terminal screen is this sizestatic int crow, ccol, offset;	// cursor is on Crow x Ccol with Horz Ofsetstatic char *SOs, *SOn;		// terminal standout start/normal ESC sequencestatic char *bell;		// terminal bell sequencestatic char *Ceol, *Ceos;	// Clear-end-of-line and Clear-end-of-screen ESC sequencestatic char *CMrc;		// Cursor motion arbitrary destination ESC sequencestatic char *CMup, *CMdown;	// Cursor motion up and down ESC sequencestatic Byte *status_buffer;	// mesages to the userstatic Byte last_input_char;	// last char read from userstatic Byte last_forward_char;	// last char searched for with 'f'static Byte *cfn;		// previous, current, and next file namestatic Byte *text, *end, *textend;	// pointers to the user data in memorystatic Byte *screen;		// pointer to the virtual screen bufferstatic int screensize;		//            and its sizestatic Byte *screenbegin;	// index into text[], of top line on the screenstatic Byte *dot;		// where all the action takes placestatic int tabstop;static struct termios term_orig, term_vi;	// remember what the cooked mode was#ifdef BB_FEATURE_VI_OPTIMIZE_CURSORstatic int last_row;		// where the cursor was last moved to#endif							/* BB_FEATURE_VI_OPTIMIZE_CURSOR */#ifdef BB_FEATURE_VI_USE_SIGNALSstatic jmp_buf restart;		// catch_sig()#endif							/* BB_FEATURE_VI_USE_SIGNALS */#ifdef BB_FEATURE_VI_WIN_RESIZEstatic struct winsize winsize;	// remember the window size#endif							/* BB_FEATURE_VI_WIN_RESIZE */#ifdef BB_FEATURE_VI_DOT_CMDstatic int adding2q;		// are we currently adding user input to qstatic Byte *last_modifying_cmd;	// last modifying cmd for "."static Byte *ioq, *ioq_start;	// pointer to string for get_one_char to "read"#endif							/* BB_FEATURE_VI_DOT_CMD */#if	defined(BB_FEATURE_VI_DOT_CMD) || defined(BB_FEATURE_VI_YANKMARK)static Byte *modifying_cmds;	// cmds that modify text[]#endif							/* BB_FEATURE_VI_DOT_CMD || BB_FEATURE_VI_YANKMARK */#ifdef BB_FEATURE_VI_READONLYstatic int vi_readonly, readonly;#endif							/* BB_FEATURE_VI_READONLY */#ifdef BB_FEATURE_VI_SETOPTSstatic int autoindent;static int showmatch;static int ignorecase;#endif							/* BB_FEATURE_VI_SETOPTS */#ifdef BB_FEATURE_VI_YANKMARKstatic Byte *reg[28];		// named register a-z, "D", and "U" 0-25,26,27static int YDreg, Ureg;		// default delete register and orig line for "U"static Byte *mark[28];		// user marks points somewhere in text[]-  a-z and previous context ''static Byte *context_start, *context_end;#endif							/* BB_FEATURE_VI_YANKMARK */#ifdef BB_FEATURE_VI_SEARCHstatic Byte *last_search_pattern;	// last pattern from a '/' or '?' search#endif							/* BB_FEATURE_VI_SEARCH */static void edit_file(Byte *);	// edit one filestatic void do_cmd(Byte);	// execute a commandstatic void sync_cursor(Byte *, int *, int *);	// synchronize the screen cursor to dotstatic Byte *begin_line(Byte *);	// return pointer to cur line B-o-lstatic Byte *end_line(Byte *);	// return pointer to cur line E-o-lstatic Byte *dollar_line(Byte *);	// return pointer to just before NLstatic Byte *prev_line(Byte *);	// return pointer to prev line B-o-lstatic Byte *next_line(Byte *);	// return pointer to next line B-o-lstatic Byte *end_screen(void);	// get pointer to last char on screenstatic int count_lines(Byte *, Byte *);	// count line from start to stopstatic Byte *find_line(int);	// find begining of line #listatic Byte *move_to_col(Byte *, int);	// move "p" to column lstatic int isblnk(Byte);	// is the char a blank or tabstatic void dot_left(void);	// move dot left- dont leave linestatic void dot_right(void);	// move dot right- dont leave linestatic void dot_begin(void);	// move dot to B-o-lstatic void dot_end(void);	// move dot to E-o-lstatic void dot_next(void);	// move dot to next line B-o-lstatic void dot_prev(void);	// move dot to prev line B-o-lstatic void dot_scroll(int, int);	// move the screen up or downstatic void dot_skip_over_ws(void);	// move dot pat WSstatic void dot_delete(void);	// delete the char at 'dot'static Byte *bound_dot(Byte *);	// make sure  text[0] <= P < "end"static Byte *new_screen(int, int);	// malloc virtual screen memorystatic Byte *new_text(int);	// malloc memory for text[] bufferstatic Byte *char_insert(Byte *, Byte);	// insert the char c at 'p'static Byte *stupid_insert(Byte *, Byte);	// stupidly insert the char c at 'p'static Byte find_range(Byte **, Byte **, Byte);	// return pointers for an objectstatic int st_test(Byte *, int, int, Byte *);	// helper for skip_thing()static Byte *skip_thing(Byte *, int, int, int);	// skip some objectstatic Byte *find_pair(Byte *, Byte);	// find matching pair ()  []  {}static Byte *text_hole_delete(Byte *, Byte *);	// at "p", delete a 'size' byte holestatic Byte *text_hole_make(Byte *, int);	// at "p", make a 'size' byte holestatic Byte *yank_delete(Byte *, Byte *, int, int);	// yank text[] into register then deletestatic void show_help(void);	// display some help infostatic void print_literal(Byte *, Byte *);	// copy s to buf, convert unprintablestatic void rawmode(void);	// set "raw" mode on ttystatic void cookmode(void);	// return to "cooked" mode on ttystatic int mysleep(int);	// sleep for 'h' 1/100 secondsstatic Byte readit(void);	// read (maybe cursor) key from stdinstatic Byte get_one_char(void);	// read 1 char from stdinstatic int file_size(Byte *);	// what is the byte size of "fn"static int file_insert(Byte *, Byte *, int);static int file_write(Byte *, Byte *, Byte *);static void place_cursor(int, int, int);static void screen_erase();static void clear_to_eol(void);static void clear_to_eos(void);static void standout_start(void);	// send "start reverse video" sequencestatic void standout_end(void);	// send "end reverse video" sequencestatic void flash(int);		// flash the terminal screenstatic void beep(void);		// beep the terminalstatic void indicate_error(char);	// use flash or beep to indicate errorstatic void show_status_line(void);	// put a message on the bottom linestatic void psb(char *, ...);	// Print Status Bufstatic void psbs(char *, ...);	// Print Status Buf in standout modestatic void ni(Byte *);		// display messagesstatic void edit_status(void);	// show file status on status linestatic void redraw(int);	// force a full screen refreshstatic void format_line(Byte*, Byte*, int);static void refresh(int);	// update the terminal from screen[]#ifdef BB_FEATURE_VI_SEARCHstatic Byte *char_search(Byte *, Byte *, int, int);	// search for pattern starting at pstatic int mycmp(Byte *, Byte *, int);	// string cmp based in "ignorecase"#endif							/* BB_FEATURE_VI_SEARCH */#ifdef BB_FEATURE_VI_COLONstatic void Hit_Return(void);static Byte *get_one_address(Byte *, int *);	// get colon addr, if presentstatic Byte *get_address(Byte *, int *, int *);	// get two colon addrs, if presentstatic void colon(Byte *);	// execute the "colon" mode cmds#endif							/* BB_FEATURE_VI_COLON */static Byte *get_input_line(Byte *);	// get input line- use "status line"#ifdef BB_FEATURE_VI_USE_SIGNALSstatic void winch_sig(int);	// catch window size changesstatic void suspend_sig(int);	// catch ctrl-Zstatic void alarm_sig(int);	// catch alarm time-outsstatic void catch_sig(int);	// catch ctrl-Cstatic void core_sig(int);	// catch a core dump signal#endif							/* BB_FEATURE_VI_USE_SIGNALS */#ifdef BB_FEATURE_VI_DOT_CMDstatic void start_new_cmd_q(Byte);	// new queue for commandstatic void end_cmd_q();	// stop saving input chars#else							/* BB_FEATURE_VI_DOT_CMD */#define end_cmd_q()#endif							/* BB_FEATURE_VI_DOT_CMD */#ifdef BB_FEATURE_VI_WIN_RESIZEstatic void window_size_get(int);	// find out what size the window is#endif							/* BB_FEATURE_VI_WIN_RESIZE */#ifdef BB_FEATURE_VI_SETOPTSstatic void showmatching(Byte *);	// show the matching pair ()  []  {}#endif							/* BB_FEATURE_VI_SETOPTS */#if defined(BB_FEATURE_VI_YANKMARK) || defined(BB_FEATURE_VI_COLON) || defined(BB_FEATURE_VI_CRASHME)static Byte *string_insert(Byte *, Byte *);	// insert the string at 'p'#endif							/* BB_FEATURE_VI_YANKMARK || BB_FEATURE_VI_COLON || BB_FEATURE_VI_CRASHME */#ifdef BB_FEATURE_VI_YANKMARKstatic Byte *text_yank(Byte *, Byte *, int);	// save copy of "p" into a registerstatic Byte what_reg(void);		// what is letter of current YDregstatic void check_context(Byte);	// remember context for '' commandstatic Byte *swap_context(Byte *);	// goto new context for '' command#endif							/* BB_FEATURE_VI_YANKMARK */#ifdef BB_FEATURE_VI_CRASHMEstatic void crash_dummy();static void crash_test();static int crashme = 0;#endif							/* BB_FEATURE_VI_CRASHME */extern int vi_main(int argc, char **argv){	int c;#ifdef BB_FEATURE_VI_YANKMARK	int i;#endif							/* BB_FEATURE_VI_YANKMARK */	CMrc= "\033[%d;%dH";	// Terminal Crusor motion ESC sequence	CMup= "\033[A";		// move cursor up one line, same col	CMdown="\n";		// move cursor down one line, same col	Ceol= "\033[0K";	// Clear from cursor to end of line	Ceos= "\033[0J";	// Clear from cursor to end of screen	SOs = "\033[7m";	// Terminal standout mode on	SOn = "\033[0m";	// Terminal standout mode off	bell= "\007";		// Terminal bell sequence#ifdef BB_FEATURE_VI_CRASHME	(void) srand((long) getpid());#endif							/* BB_FEATURE_VI_CRASHME */	status_buffer = (Byte *) xmalloc(200);	// hold messages to user#ifdef BB_FEATURE_VI_READONLY	vi_readonly = readonly = FALSE;	if (strncmp(argv[0], "view", 4) == 0) {		readonly = TRUE;		vi_readonly = TRUE;	}#endif							/* BB_FEATURE_VI_READONLY */#ifdef BB_FEATURE_VI_SETOPTS	autoindent = 1;	ignorecase = 1;	showmatch = 1;#endif							/* BB_FEATURE_VI_SETOPTS */#ifdef BB_FEATURE_VI_YANKMARK	for (i = 0; i < 28; i++) {		reg[i] = 0;	}					// init the yank regs#endif							/* BB_FEATURE_VI_YANKMARK */#if defined(BB_FEATURE_VI_DOT_CMD) || defined(BB_FEATURE_VI_YANKMARK)	modifying_cmds = (Byte *) "aAcCdDiIJoOpPrRsxX<>~";	// cmds modifying text[]#endif							/* BB_FEATURE_VI_DOT_CMD */	//  1-  process $HOME/.exrc file	//  2-  process EXINIT variable from environment	//  3-  process command line args	while ((c = getopt(argc, argv, "hCR")) != -1) {		switch (c) {#ifdef BB_FEATURE_VI_CRASHME		case 'C':			crashme = 1;			break;#endif							/* BB_FEATURE_VI_CRASHME */#ifdef BB_FEATURE_VI_READONLY		case 'R':		// Read-only flag			readonly = TRUE;			break;#endif							/* BB_FEATURE_VI_READONLY */			//case 'r':	// recover flag-  ignore- we don't use tmp file			//case 'x':	// encryption flag- ignore			//case 'c':	// execute command first			//case 'h':	// help -- just use default		default:			show_help();			return 1;		}	}	// The argv array can be used by the ":next"  and ":rewind" commands	// save optind.	fn_start = optind;	// remember first file name for :next and :rew	save_argc = argc;	//----- This is the main file handling loop --------------	if (optind >= argc) {		editing = 1;	// 0= exit,  1= one file,  2= multiple files		edit_file(0);	} else {		for (; optind < argc; optind++) {			editing = 1;	// 0=exit, 1=one file, 2+ =many files			if (cfn != 0)				free(cfn);			cfn = (Byte *) strdup(argv[optind]);			edit_file(cfn);		}	}	//-----------------------------------------------------------	return (0);}static void edit_file(Byte * fn){	char c;	int cnt, size, ch;#ifdef BB_FEATURE_VI_USE_SIGNALS	char *msg;	int sig;#endif							/* BB_FEATURE_VI_USE_SIGNALS */#ifdef BB_FEATURE_VI_YANKMARK	static Byte *cur_line;#endif							/* BB_FEATURE_VI_YANKMARK */	rawmode();	rows = 24;	columns = 80;	ch= -1;#ifdef BB_FEATURE_VI_WIN_RESIZE	window_size_get(0);#endif							/* BB_FEATURE_VI_WIN_RESIZE */