Annotation of dgamelaunch-openbsd/virus.c, Revision 1.1.1.1
1.1 rubenllo 1: /* vi: set sw=8 ts=8: */
2: /*
3: * virus - vi resembling utility skeleton - based on
4: * tiny vi.c: A small 'vi' clone (from busybox 0.52)
5: *
6: * Copyright (C) 2001 - 2003 Stefan Koerner <ripclaw@rocklinux.org>
7: * Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com>
8: *
9: * This program is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * This program is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17: * GNU General Public License for more details.
18: *
19: * You should have received a copy of the GNU General Public License
20: * along with this program; if not, write to the Free Software
21: * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22: */
23:
24: #include "config.h"
25:
26: char *vi_Version = "0.0.6+dgamelaunch " PACKAGE_VERSION;
27:
28: /*
29: * To compile:
30: * gcc -Wall -Os -s -o vi virus.c
31: * strip vi
32: */
33:
34: /* this was in here from busybox, will sort out later FIXME
35: * Things To Do:
36: * EXINIT
37: * $HOME/.exrc and ./.exrc
38: * add magic to search /foo.*bar
39: * add :help command
40: * :map macros
41: * how about mode lines: vi: set sw=8 ts=8:
42: * if mark[] values were line numbers rather than pointers
43: * it would be easier to change the mark when add/delete lines
44: * More intelligence in refresh()
45: * ":r !cmd" and "!cmd" to filter text through an external command
46: * A true "undo" facility
47: * An "ex" line oriented mode- maybe using "cmdedit"
48: */
49:
50: //---- Feature -------------- Bytes to immplement
51: #define vi_main main
52: #define BB_FEATURE_VI_COLON // 4288
53: #define BB_FEATURE_VI_YANKMARK // 1408
54: #define BB_FEATURE_VI_SEARCH // 1088
55: // #define BB_FEATURE_VI_USE_SIGNALS // 1056
56: #define BB_FEATURE_VI_DOT_CMD // 576
57: #define BB_FEATURE_VI_READONLY // 128
58: //#define BB_FEATURE_VI_SETOPTS // 576
59: #define BB_FEATURE_VI_SET // 224
60: #define BB_FEATURE_VI_WIN_RESIZE // 256 WIN_RESIZE
61: // To test editor using CRASHME:
62: // vi -C filename
63: // To stop testing, wait until all to text[] is deleted, or
64: // Ctrl-Z and kill -9 %1
65: // while in the editor Ctrl-T will toggle the crashme function on and off.
66: //#define BB_FEATURE_VI_CRASHME // randomly pick commands to execute
67:
68: #include <stdio.h>
69: #include <stdlib.h>
70: #include <string.h>
71: #include <termios.h>
72: #include <unistd.h>
73: #include <sys/ioctl.h>
74: #include <sys/time.h>
75: #include <sys/types.h>
76: #include <sys/stat.h>
77: #include <time.h>
78: #include <fcntl.h>
79: #include <signal.h>
80: #include <setjmp.h>
81: #include <regex.h>
82: #include <ctype.h>
83: #include <assert.h>
84: #include <errno.h>
85: #include <err.h>
86: #include <stdarg.h>
87:
88: #include "last_char_is.c"
89: #include "strlcat.c"
90: #include "strlcpy.c"
91:
92: #ifndef TRUE
93: #define TRUE ((int)1)
94: #define FALSE ((int)0)
95: #endif /* TRUE */
96: #define MAX_SCR_COLS BUFSIZ
97: #define BUFSIZ_STATBUF 200
98:
99: // Misc. non-Ascii keys that report an escape sequence
100: #define VI_K_UP 128 // cursor key Up
101: #define VI_K_DOWN 129 // cursor key Down
102: #define VI_K_RIGHT 130 // Cursor Key Right
103: #define VI_K_LEFT 131 // cursor key Left
104: #define VI_K_HOME 132 // Cursor Key Home
105: #define VI_K_END 133 // Cursor Key End
106: #define VI_K_INSERT 134 // Cursor Key Insert
107: #define VI_K_PAGEUP 135 // Cursor Key Page Up
108: #define VI_K_PAGEDOWN 136 // Cursor Key Page Down
109: #define VI_K_FUN1 137 // Function Key F1
110: #define VI_K_FUN2 138 // Function Key F2
111: #define VI_K_FUN3 139 // Function Key F3
112: #define VI_K_FUN4 140 // Function Key F4
113: #define VI_K_FUN5 141 // Function Key F5
114: #define VI_K_FUN6 142 // Function Key F6
115: #define VI_K_FUN7 143 // Function Key F7
116: #define VI_K_FUN8 144 // Function Key F8
117: #define VI_K_FUN9 145 // Function Key F9
118: #define VI_K_FUN10 146 // Function Key F10
119: #define VI_K_FUN11 147 // Function Key F11
120: #define VI_K_FUN12 148 // Function Key F12
121:
122: static const int YANKONLY = FALSE;
123: static const int YANKDEL = TRUE;
124: static const int FORWARD = 1; // code depends on "1" for array index
125: static const int BACK = -1; // code depends on "-1" for array index
126: static const int LIMITED = 0; // how much of text[] in char_search
127: static const int FULL = 1; // how much of text[] in char_search
128:
129: static const int S_BEFORE_WS = 1; // used in skip_thing() for moving "dot"
130: static const int S_TO_WS = 2; // used in skip_thing() for moving "dot"
131: static const int S_OVER_WS = 3; // used in skip_thing() for moving "dot"
132: static const int S_END_PUNCT = 4; // used in skip_thing() for moving "dot"
133: static const int S_END_ALNUM = 5; // used in skip_thing() for moving "dot"
134:
135: typedef unsigned char Byte;
136:
137:
138: static int editing; // >0 while we are editing a file
139: static int cmd_mode; // 0=command 1=insert
140: static int file_modified; // buffer contents changed
141: static int err_method; // indicate error with beep or flash
142: static int fn_start; // index of first cmd line file name
143: static int save_argc; // how many file names on cmd line
144: static int cmdcnt; // repetition count
145: static fd_set rfds; // use select() for small sleeps
146: static struct timeval tv; // use select() for small sleeps
147: static char erase_char; // the users erase character
148: static int rows, columns; // the terminal screen is this size
149: static int crow, ccol, offset; // cursor is on Crow x Ccol with Horz Ofset
150: static char *SOs, *SOn; // terminal standout start/normal ESC sequence
151: static char *bell; // terminal bell sequence
152: static char *Ceol, *Ceos; // Clear-end-of-line and Clear-end-of-screen ESC sequence
153: static char *CMrc; // Cursor motion arbitrary destination ESC sequence
154: static char *CMup, *CMdown; // Cursor motion up and down ESC sequence
155: static Byte *status_buffer; // mesages to the user
156: static Byte last_input_char; // last char read from user
157: static Byte last_forward_char; // last char searched for with 'f'
158: static Byte *cfn; // previous, current, and next file name
159: static Byte *text, *end, *textend; // pointers to the user data in memory
160: static Byte *screen; // pointer to the virtual screen buffer
161: static int screensize; // and its size
162: static Byte *screenbegin; // index into text[], of top line on the screen
163: static Byte *dot; // where all the action takes place
164: static int tabstop;
165: static struct termios term_orig, term_vi; // remember what the cooked mode was
166:
167: #ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
168: static int last_row; // where the cursor was last moved to
169: #endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
170: #ifdef BB_FEATURE_VI_USE_SIGNALS
171: static jmp_buf restart; // catch_sig()
172: #endif /* BB_FEATURE_VI_USE_SIGNALS */
173: #ifdef BB_FEATURE_VI_WIN_RESIZE
174: static struct winsize winsize; // remember the window size
175: #endif /* BB_FEATURE_VI_WIN_RESIZE */
176: #ifdef BB_FEATURE_VI_DOT_CMD
177: static int adding2q; // are we currently adding user input to q
178: static Byte *last_modifying_cmd; // last modifying cmd for "."
179: static Byte *ioq, *ioq_start; // pointer to string for get_one_char to "read"
180: #endif /* BB_FEATURE_VI_DOT_CMD */
181: #if defined(BB_FEATURE_VI_DOT_CMD) || defined(BB_FEATURE_VI_YANKMARK)
182: static Byte *modifying_cmds; // cmds that modify text[]
183: #endif /* BB_FEATURE_VI_DOT_CMD || BB_FEATURE_VI_YANKMARK */
184: #ifdef BB_FEATURE_VI_READONLY
185: static int vi_readonly, readonly;
186: #endif /* BB_FEATURE_VI_READONLY */
187: #ifdef BB_FEATURE_VI_SETOPTS
188: static int autoindent;
189: static int showmatch;
190: static int ignorecase;
191: #endif /* BB_FEATURE_VI_SETOPTS */
192: #ifdef BB_FEATURE_VI_YANKMARK
193: static Byte *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
194: static int YDreg, Ureg; // default delete register and orig line for "U"
195: static Byte *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
196: static Byte *context_start, *context_end;
197: #endif /* BB_FEATURE_VI_YANKMARK */
198: #ifdef BB_FEATURE_VI_SEARCH
199: static Byte *last_search_pattern; // last pattern from a '/' or '?' search
200: #endif /* BB_FEATURE_VI_SEARCH */
201:
202:
203: static void edit_file (Byte *); // edit one file
204: static void do_cmd (Byte); // execute a command
205: static void sync_cursor (Byte *, int *, int *); // synchronize the screen cursor to dot
206: static Byte *begin_line (Byte *); // return pointer to cur line B-o-l
207: static Byte *end_line (Byte *); // return pointer to cur line E-o-l
208: static Byte *dollar_line (Byte *); // return pointer to just before NL
209: static Byte *prev_line (Byte *); // return pointer to prev line B-o-l
210: static Byte *next_line (Byte *); // return pointer to next line B-o-l
211: static Byte *end_screen (void); // get pointer to last char on screen
212: static int count_lines (Byte *, Byte *); // count line from start to stop
213: static Byte *find_line (int); // find begining of line #li
214: static Byte *move_to_col (Byte *, int); // move "p" to column l
215: static int isblnk (Byte); // is the char a blank or tab
216: static void dot_left (void); // move dot left- dont leave line
217: static void dot_right (void); // move dot right- dont leave line
218: static void dot_begin (void); // move dot to B-o-l
219: static void dot_end (void); // move dot to E-o-l
220: static void dot_next (void); // move dot to next line B-o-l
221: static void dot_prev (void); // move dot to prev line B-o-l
222: static void dot_scroll (int, int); // move the screen up or down
223: static void dot_skip_over_ws (void); // move dot pat WS
224: static void dot_delete (void); // delete the char at 'dot'
225: static Byte *bound_dot (Byte *); // make sure text[0] <= P < "end"
226: static Byte *new_screen (int, int); // malloc virtual screen memory
227: static Byte *new_text (int); // malloc memory for text[] buffer
228: static Byte *char_insert (Byte *, Byte); // insert the char c at 'p'
229: static Byte *stupid_insert (Byte *, Byte); // stupidly insert the char c at 'p'
230: static Byte find_range (Byte **, Byte **, Byte); // return pointers for an object
231: static int st_test (Byte *, int, int, Byte *); // helper for skip_thing()
232: static Byte *skip_thing (Byte *, int, int, int); // skip some object
233: static Byte *find_pair (Byte *, Byte); // find matching pair () [] {}
234: static Byte *text_hole_delete (Byte *, Byte *); // at "p", delete a 'size' byte hole
235: static Byte *text_hole_make (Byte *, int); // at "p", make a 'size' byte hole
236: static Byte *yank_delete (Byte *, Byte *, int, int); // yank text[] into register then delete
237: static void show_help (void); // display some help info
238: static void print_literal (Byte *, Byte *); // copy s to buf, convert unprintable
239: static void rawmode (void); // set "raw" mode on tty
240: static void cookmode (void); // return to "cooked" mode on tty
241: static int mysleep (int); // sleep for 'h' 1/100 seconds
242: static Byte readit (void); // read (maybe cursor) key from stdin
243: static Byte get_one_char (void); // read 1 char from stdin
244: static int file_size (Byte *); // what is the byte size of "fn"
245: static int file_insert (Byte *, Byte *, int);
246: static int file_write (Byte *, Byte *, Byte *);
247: static void place_cursor (int, int, int);
248: static void screen_erase ();
249: static void clear_to_eol (void);
250: static void clear_to_eos (void);
251: static void standout_start (void); // send "start reverse video" sequence
252: static void standout_end (void); // send "end reverse video" sequence
253: static void flash (int); // flash the terminal screen
254: static void beep (void); // beep the terminal
255: static void indicate_error (char); // use flash or beep to indicate error
256: static void show_status_line (void); // put a message on the bottom line
257: static void psb (char *, ...); // Print Status Buf
258: static void psbs (char *, ...); // Print Status Buf in standout mode
259: static void ni (Byte *); // display messages
260: static void edit_status (void); // show file status on status line
261: static void redraw (int); // force a full screen refresh
262: static void format_line (Byte *, Byte *, int);
263: static void refresh (int); // update the terminal from screen[]
264:
265: #ifdef BB_FEATURE_VI_SEARCH
266: static Byte *char_search (Byte *, Byte *, int, int); // search for pattern starting at p
267: static int mycmp (Byte *, Byte *, int); // string cmp based in "ignorecase"
268: #endif /* BB_FEATURE_VI_SEARCH */
269: #ifdef BB_FEATURE_VI_COLON
270: static void Hit_Return (void);
271: static Byte *get_one_address (Byte *, int *); // get colon addr, if present
272: static Byte *get_address (Byte *, int *, int *); // get two colon addrs, if present
273: static void colon (Byte *); // execute the "colon" mode cmds
274: #endif /* BB_FEATURE_VI_COLON */
275: static Byte *get_input_line (Byte *); // get input line- use "status line"
276: #ifdef BB_FEATURE_VI_USE_SIGNALS
277: static void winch_sig (int); // catch window size changes
278: static void suspend_sig (int); // catch ctrl-Z
279: static void alarm_sig (int); // catch alarm time-outs
280: static void catch_sig (int); // catch ctrl-C
281: static void core_sig (int); // catch a core dump signal
282: #endif /* BB_FEATURE_VI_USE_SIGNALS */
283: #ifdef BB_FEATURE_VI_DOT_CMD
284: static void start_new_cmd_q (Byte); // new queue for command
285: static void end_cmd_q (); // stop saving input chars
286: #else /* BB_FEATURE_VI_DOT_CMD */
287: #define end_cmd_q()
288: #endif /* BB_FEATURE_VI_DOT_CMD */
289: #ifdef BB_FEATURE_VI_WIN_RESIZE
290: static void window_size_get (int); // find out what size the window is
291: #endif /* BB_FEATURE_VI_WIN_RESIZE */
292: #ifdef BB_FEATURE_VI_SETOPTS
293: static void showmatching (Byte *); // show the matching pair () [] {}
294: #endif /* BB_FEATURE_VI_SETOPTS */
295: #if defined(BB_FEATURE_VI_YANKMARK) || defined(BB_FEATURE_VI_COLON) || defined(BB_FEATURE_VI_CRASHME)
296: static Byte *string_insert (Byte *, Byte *); // insert the string at 'p'
297: #endif /* BB_FEATURE_VI_YANKMARK || BB_FEATURE_VI_COLON || BB_FEATURE_VI_CRASHME */
298: #ifdef BB_FEATURE_VI_YANKMARK
299: static Byte *text_yank (Byte *, Byte *, int); // save copy of "p" into a register
300: static Byte what_reg (void); // what is letter of current YDreg
301: static void check_context (Byte); // remember context for '' command
302: static Byte *swap_context (Byte *); // goto new context for '' command
303: #endif /* BB_FEATURE_VI_YANKMARK */
304: #ifdef BB_FEATURE_VI_CRASHME
305: static void crash_dummy ();
306: static void crash_test ();
307: static int crashme = 0;
308: #endif /* BB_FEATURE_VI_CRASHME */
309:
310:
311: extern int
312: main (int argc, char **argv)
313: {
314: #ifdef BB_FEATURE_VI_YANKMARK
315: int i;
316: #endif /* BB_FEATURE_VI_YANKMARK */
317:
318: CMrc = "\033[%d;%dH"; // Terminal Crusor motion ESC sequence
319: CMup = "\033[A"; // move cursor up one line, same col
320: CMdown = "\n"; // move cursor down one line, same col
321: Ceol = "\033[0K"; // Clear from cursor to end of line
322: Ceos = "\033[0J"; // Clear from cursor to end of screen
323: SOs = "\033[7m"; // Terminal standout mode on
324: SOn = "\033[0m"; // Terminal standout mode off
325: bell = "\007"; // Terminal bell sequence
326: #ifdef BB_FEATURE_VI_CRASHME
327: (void) srand ((long) getpid ());
328: #endif /* BB_FEATURE_VI_CRASHME */
329: status_buffer = (Byte *) malloc (BUFSIZ_STATBUF); // hold messages to user
330: #ifdef BB_FEATURE_VI_READONLY
331: vi_readonly = readonly = FALSE;
332: if (strncmp (argv[0], "view", 4) == 0) {
333: readonly = TRUE;
334: vi_readonly = TRUE;
335: }
336: #endif /* BB_FEATURE_VI_READONLY */
337: #ifdef BB_FEATURE_VI_SETOPTS
338: autoindent = 1;
339: ignorecase = 1;
340: showmatch = 1;
341: #endif /* BB_FEATURE_VI_SETOPTS */
342: #ifdef BB_FEATURE_VI_YANKMARK
343: for (i = 0; i < 28; i++) {
344: reg[i] = 0;
345: } // init the yank regs
346: #endif /* BB_FEATURE_VI_YANKMARK */
347: #ifdef BB_FEATURE_VI_DOT_CMD
348: modifying_cmds = (Byte *) "aAcCdDiIJoOpPrRsxX<>~"; // cmds modifying text[]
349: #endif /* BB_FEATURE_VI_DOT_CMD */
350:
351: if (argc >= 2)
352: {
353: cfn = (Byte *) strdup (argv[1]);
354: edit_file (cfn);
355: }
356: else
357: {
358: fprintf (stderr, "%s: no file to edit, bailing out\n", argv[0]);
359: exit (-20);
360: }
361:
362: //-----------------------------------------------------------
363:
364:
365: /* set these back to defaults. this was the infamous screen resize crash bug */
366: signal (SIGWINCH, SIG_DFL);
367: signal (SIGTSTP, SIG_DFL);
368:
369: return (0);
370: }
371:
372: static void edit_file (Byte * fn)
373: {
374: char c;
375: int cnt, size, ch;
376:
377: #ifdef BB_FEATURE_VI_USE_SIGNALS
378: char *msg;
379: int sig;
380: #endif /* BB_FEATURE_VI_USE_SIGNALS */
381: #ifdef BB_FEATURE_VI_YANKMARK
382: static Byte *cur_line;
383: #endif /* BB_FEATURE_VI_YANKMARK */
384:
385: rawmode ();
386: rows = 24;
387: columns = 80;
388: ch = -1;
389: #ifdef BB_FEATURE_VI_WIN_RESIZE
390: window_size_get (0);
391: #endif /* BB_FEATURE_VI_WIN_RESIZE */
392: new_screen (rows, columns); // get memory for virtual screen
393:
394: cnt = file_size (fn); // file size
395: size = 2 * cnt; // 200% of file size
396: new_text (size); // get a text[] buffer
397: screenbegin = dot = end = text;
398: if (fn != 0) {
399: ch = file_insert (fn, text, cnt);
400: }
401: if (ch < 1) {
402: (void) char_insert (text, '\n'); // start empty buf with dummy line
403: }
404: file_modified = FALSE;
405: #ifdef BB_FEATURE_VI_YANKMARK
406: YDreg = 26; // default Yank/Delete reg
407: Ureg = 27; // hold orig line for "U" cmd
408: for (cnt = 0; cnt < 28; cnt++) {
409: mark[cnt] = 0;
410: } // init the marks
411: mark[26] = mark[27] = text; // init "previous context"
412: #endif /* BB_FEATURE_VI_YANKMARK */
413:
414: err_method = 1; // flash
415: last_forward_char = last_input_char = '\0';
416: crow = 0;
417: ccol = 0;
418: edit_status ();
419:
420: #ifdef BB_FEATURE_VI_USE_SIGNALS
421: signal (SIGHUP, catch_sig);
422: signal (SIGINT, catch_sig);
423: signal (SIGALRM, alarm_sig);
424: signal (SIGTERM, catch_sig);
425: signal (SIGQUIT, core_sig);
426: signal (SIGILL, core_sig);
427: signal (SIGTRAP, core_sig);
428: signal (SIGIOT, core_sig);
429: signal (SIGABRT, core_sig);
430: signal (SIGFPE, core_sig);
431: signal (SIGBUS, core_sig);
432: signal (SIGSEGV, core_sig);
433: #ifdef SIGSYS
434: signal (SIGSYS, core_sig);
435: #endif
436: signal (SIGWINCH, winch_sig);
437: signal (SIGTSTP, suspend_sig);
438: sig = setjmp (restart);
439: if (sig != 0) {
440: msg = "";
441: if (sig == SIGWINCH)
442: msg = "(window resize)";
443: if (sig == SIGHUP)
444: msg = "(hangup)";
445: if (sig == SIGINT)
446: msg = "(interrupt)";
447: if (sig == SIGTERM)
448: msg = "(terminate)";
449: if (sig == SIGBUS)
450: msg = "(bus error)";
451: if (sig == SIGSEGV)
452: msg = "(I tried to touch invalid memory)";
453: if (sig == SIGALRM)
454: msg = "(alarm)";
455:
456: psbs ("-- caught signal %d %s--", sig, msg);
457: screenbegin = dot = text;
458: }
459: #endif /* BB_FEATURE_VI_USE_SIGNALS */
460:
461: editing = 1;
462: cmd_mode = 0; // 0=command 1=insert 2='R'eplace
463: cmdcnt = 0;
464: tabstop = 8;
465: offset = 0; // no horizontal offset
466: c = '\0';
467: #ifdef BB_FEATURE_VI_DOT_CMD
468: if (last_modifying_cmd != 0)
469: free (last_modifying_cmd);
470: if (ioq_start != NULL)
471: free (ioq_start);
472: ioq = ioq_start = last_modifying_cmd = 0;
473: adding2q = 0;
474: #endif /* BB_FEATURE_VI_DOT_CMD */
475: redraw (FALSE); // dont force every col re-draw
476: show_status_line ();
477:
478: //------This is the main Vi cmd handling loop -----------------------
479: while (editing > 0) {
480: #ifdef BB_FEATURE_VI_CRASHME
481: if (crashme > 0) {
482: if ((end - text) > 1) {
483: crash_dummy (); // generate a random command
484: } else {
485: crashme = 0;
486: dot =
487: string_insert(text, (Byte *) "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
488: refresh (FALSE);
489: }
490: }
491: #endif /* BB_FEATURE_VI_CRASHME */
492: last_input_char = c = get_one_char (); // get a cmd from user
493: #ifdef BB_FEATURE_VI_YANKMARK
494: // save a copy of the current line- for the 'U" command
495: if (begin_line (dot) != cur_line) {
496: cur_line = begin_line (dot);
497: text_yank (begin_line (dot), end_line (dot), Ureg);
498: }
499: #endif /* BB_FEATURE_VI_YANKMARK */
500: #ifdef BB_FEATURE_VI_DOT_CMD
501: // These are commands that change text[].
502: // Remember the input for the "." command
503: if (!adding2q && ioq_start == 0
504: && strchr((char *) modifying_cmds, c) != NULL) {
505: start_new_cmd_q (c);
506: }
507: #endif /* BB_FEATURE_VI_DOT_CMD */
508: do_cmd (c); // execute the user command
509: //
510: // poll to see if there is input already waiting. if we are
511: // not able to display output fast enough to keep up, skip
512: // the display update until we catch up with input.
513: if (mysleep(0) == 0) {
514: // no input pending- so update output
515: refresh (FALSE);
516: show_status_line ();
517: }
518: #ifdef BB_FEATURE_VI_CRASHME
519: if (crashme > 0)
520: crash_test (); // test editor variables
521: #endif /* BB_FEATURE_VI_CRASHME */
522: }
523: //-------------------------------------------------------------------
524:
525: place_cursor (rows, 0, FALSE); // go to bottom of screen
526: clear_to_eol (); // Erase to end of line
527: cookmode ();
528: }
529:
530: static Byte readbuffer[BUFSIZ];
531:
532: #ifdef BB_FEATURE_VI_CRASHME
533: static int totalcmds = 0;
534: static int Mp = 85; // Movement command Probability
535: static int Np = 90; // Non-movement command Probability
536: static int Dp = 96; // Delete command Probability
537: static int Ip = 97; // Insert command Probability
538: static int Yp = 98; // Yank command Probability
539: static int Pp = 99; // Put command Probability
540: static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
541: char chars[20] = "\t012345 abcdABCD-=.$";
542: char *words[20] = { "this", "is", "a", "test",
543: "broadcast", "the", "emergency", "of",
544: "system", "quick", "brown", "fox",
545: "jumped", "over", "lazy", "dogs",
546: "back", "January", "Febuary", "March"
547: };
548: char *lines[20] = {
549: "You should have received a copy of the GNU General Public License\n",
550: "char c, cm, *cmd, *cmd1;\n",
551: "generate a command by percentages\n",
552: "Numbers may be typed as a prefix to some commands.\n",
553: "Quit, discarding changes!\n",
554: "Forced write, if permission originally not valid.\n",
555: "In general, any ex or ed command (such as substitute or delete).\n",
556: "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
557: "Please get w/ me and I will go over it with you.\n",
558: "The following is a list of scheduled, committed changes.\n",
559: "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
560: "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
561: "Any question about transactions please contact Sterling Huxley.\n",
562: "I will try to get back to you by Friday, December 31.\n",
563: "This Change will be implemented on Friday.\n",
564: "Let me know if you have problems accessing this;\n",
565: "Sterling Huxley recently added you to the access list.\n",
566: "Would you like to go to lunch?\n",
567: "The last command will be automatically run.\n",
568: "This is too much english for a computer geek.\n",
569: };
570: char *multilines[20] = {
571: "You should have received a copy of the GNU General Public License\n",
572: "char c, cm, *cmd, *cmd1;\n",
573: "generate a command by percentages\n",
574: "Numbers may be typed as a prefix to some commands.\n",
575: "Quit, discarding changes!\n",
576: "Forced write, if permission originally not valid.\n",
577: "In general, any ex or ed command (such as substitute or delete).\n",
578: "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
579: "Please get w/ me and I will go over it with you.\n",
580: "The following is a list of scheduled, committed changes.\n",
581: "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
582: "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
583: "Any question about transactions please contact Sterling Huxley.\n",
584: "I will try to get back to you by Friday, December 31.\n",
585: "This Change will be implemented on Friday.\n",
586: "Let me know if you have problems accessing this;\n",
587: "Sterling Huxley recently added you to the access list.\n",
588: "Would you like to go to lunch?\n",
589: "The last command will be automatically run.\n",
590: "This is too much english for a computer geek.\n",
591: };
592:
593: // create a random command to execute
594: static void crash_dummy()
595: {
596: static int sleeptime; // how long to pause between commands
597: char c, cm, *cmd, *cmd1;
598: int i, cnt, thing, rbi, startrbi, percent;
599:
600: // "dot" movement commands
601: cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
602:
603: // is there already a command running?
604: if (strlen ((char *) readbuffer) > 0)
605: goto cd1;
606: cd0:
607: startrbi = rbi = 0;
608: sleeptime = 0; // how long to pause between commands
609: memset (readbuffer, '\0', BUFSIZ - 1); // clear the read buffer
610: // generate a command by percentages
611: percent = (int) lrand48 () % 100; // get a number from 0-99
612: if (percent < Mp) { // Movement commands
613: // available commands
614: cmd = cmd1;
615: M++;
616: } else if (percent < Np) { // non-movement commands
617: cmd = "mz<>\'\""; // available commands
618: N++;
619: } else if (percent < Dp) { // Delete commands
620: cmd = "dx"; // available commands
621: D++;
622: } else if (percent < Ip) { // Inset commands
623: cmd = "iIaAsrJ"; // available commands
624: I++;
625: } else if (percent < Yp) { // Yank commands
626: cmd = "yY"; // available commands
627: Y++;
628: } else if (percent < Pp) { // Put commands
629: cmd = "pP"; // available commands
630: P++;
631: } else {
632: // We do not know how to handle this command, try again
633: U++;
634: goto cd0;
635: }
636: // randomly pick one of the available cmds from "cmd[]"
637: i = (int) lrand48 () % strlen (cmd);
638: cm = cmd[i];
639: if (strchr (":\024", cm))
640: goto cd0; // dont allow colon or ctrl-T commands
641: readbuffer[rbi++] = cm; // put cmd into input buffer
642:
643: // now we have the command-
644: // there are 1, 2, and multi char commands
645: // find out which and generate the rest of command as necessary
646: if (strchr ("dmryz<>\'\"", cm)) { // 2-char commands
647: cmd1 = " \n\r0$^-+wWeEbBhjklHL";
648: if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
649: cmd1 = "abcdefghijklmnopqrstuvwxyz";
650: }
651: thing = (int) lrand48 () % strlen (cmd1); // pick a movement command
652: c = cmd1[thing];
653: readbuffer[rbi++] = c; // add movement to input buffer
654: }
655: if (strchr ("iIaAsc", cm)) { // multi-char commands
656: if (cm == 'c') {
657: // change some thing
658: thing = (int) lrand48 () % strlen (cmd1); // pick a movement command
659: c = cmd1[thing];
660: readbuffer[rbi++] = c; // add movement to input buffer
661: }
662: thing = (int) lrand48 () % 4; // what thing to insert
663: cnt = (int) lrand48 () % 10; // how many to insert
664: for (i = 0; i < cnt; i++) {
665: if (thing == 0) { // insert chars
666: readbuffer[rbi++] = chars[((int) lrand48 () % strlen (chars))];
667: } else if (thing == 1) { // insert words
668: strlcat((char *) readbuffer, words[(int) lrand48() % 20], BUFSIZ); /* FIXED added BUFSIZ and converted to strlcat() */
669: strcat ((char *) readbuffer, " ");
670: sleeptime = 0; // how fast to type
671: } else if (thing == 2) { // insert lines
672: strlcat((char *) readbuffer, lines[(int) lrand48() % 20], BUFSIZ); /* FIXED added BUFSIZ and converted to strlcat() */
673: sleeptime = 0; // how fast to type
674: } else { // insert multi-lines
675: strlcat((char *) readbuffer, multilines[(int) lrand48() % 20], BUFSIZ); /* FIXED added BUFSIZ and converted to stlcat() */
676: sleeptime = 0; // how fast to type
677: }
678: }
679: strcat ((char *) readbuffer, "\033");
680: }
681: cd1:
682: totalcmds++;
683: if (sleeptime > 0)
684: (void) mysleep (sleeptime); // sleep 1/100 sec
685: }
686:
687: // test to see if there are any errors
688: static void crash_test()
689: {
690: static time_t oldtim;
691: time_t tim;
692: char d[2], buf[BUFSIZ], msg[BUFSIZ];
693:
694: msg[0] = '\0';
695: if (end < text) {
696: strcat ((char *) msg, "end<text ");
697: }
698: if (end > textend) {
699: strcat ((char *) msg, "end>textend ");
700: }
701: if (dot < text) {
702: strcat ((char *) msg, "dot<text ");
703: }
704: if (dot > end) {
705: strcat ((char *) msg, "dot>end ");
706: }
707: if (screenbegin < text) {
708: strcat ((char *) msg, "screenbegin<text ");
709: }
710: if (screenbegin > end - 1) {
711: strcat ((char *) msg, "screenbegin>end-1 ");
712: }
713:
714: if (strlen (msg) > 0) {
715: // alarm(0);
716: sprintf (buf, "\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
717: totalcmds, last_input_char, msg, SOs, SOn);
718: write (1, buf, strlen (buf));
719: while (read (0, d, 1) > 0) {
720: if (d[0] == '\n' || d[0] == '\r')
721: break;
722: }
723: // alarm(3);
724: }
725: tim = (time_t) time ((time_t *) 0);
726: if (tim >= (oldtim + 3)) {
727: sprintf ((char *) status_buffer,
728: "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
729: totalcmds, M, N, I, D, Y, P, U, end - text + 1);
730: oldtim = tim;
731: }
732: return;
733: }
734: #endif /* BB_FEATURE_VI_CRASHME */
735:
736: //---------------------------------------------------------------------
737: //----- the Ascii Chart -----------------------------------------------
738: //
739: // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
740: // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
741: // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
742: // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
743: // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
744: // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
745: // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
746: // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
747: // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
748: // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
749: // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
750: // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
751: // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
752: // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
753: // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
754: // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
755: //---------------------------------------------------------------------
756:
757: //----- Execute a Vi Command -----------------------------------
758: static void do_cmd(Byte c)
759: {
760: Byte c1, *p, *q, *msg, buf[9], *save_dot;
761: int cnt, i, j, dir, yf;
762:
763: c1 = c; // quiet the compiler
764: cnt = yf = dir = 0; // quiet the compiler
765: p = q = save_dot = msg = buf; // quiet the compiler
766: memset (buf, '\0', 9); // clear buf
767:
768: /* if this is a cursor key, skip these checks */
769: switch (c) {
770: case VI_K_UP:
771: case VI_K_DOWN:
772: case VI_K_LEFT:
773: case VI_K_RIGHT:
774: case VI_K_HOME:
775: case VI_K_END:
776: case VI_K_PAGEUP:
777: case VI_K_PAGEDOWN:
778: goto key_cmd_mode;
779: }
780:
781: if (cmd_mode == 2) {
782: // we are 'R'eplacing the current *dot with new char
783: if (*dot == '\n') {
784: // don't Replace past E-o-l
785: cmd_mode = 1; // convert to insert
786: } else {
787: if (1 <= c && c <= 127) { // only ASCII chars
788: if (c != 27)
789: dot = yank_delete (dot, dot, 0, YANKDEL); // delete char
790: dot = char_insert (dot, c); // insert new char
791: }
792: goto dc1;
793: }
794: }
795: if (cmd_mode == 1) {
796: // hitting "Insert" twice means "R" replace mode
797: if (c == VI_K_INSERT) goto dc5;
798: // insert the char c at "dot"
799: if (1 <= c && c <= 127) {
800: dot = char_insert (dot, c); // only ASCII chars
801: }
802: goto dc1;
803: }
804:
805: key_cmd_mode:
806: switch (c) {
807: //case 0x01: // soh
808: //case 0x09: // ht
809: //case 0x0b: // vt
810: //case 0x0e: // so
811: //case 0x0f: // si
812: //case 0x10: // dle
813: //case 0x11: // dc1
814: //case 0x13: // dc3
815: #ifdef BB_FEATURE_VI_CRASHME
816: case 0x14: // dc4 ctrl-T
817: crashme = (crashme == 0) ? 1 : 0;
818: break;
819: #endif /* BB_FEATURE_VI_CRASHME */
820: //case 0x16: // syn
821: //case 0x17: // etb
822: //case 0x18: // can
823: //case 0x1c: // fs
824: //case 0x1d: // gs
825: //case 0x1e: // rs
826: //case 0x1f: // us
827: //case '!': // !-
828: //case '#': // #-
829: //case '&': // &-
830: //case '(': // (-
831: //case ')': // )-
832: //case '*': // *-
833: //case ',': // ,-
834: //case '=': // =-
835: //case '@': // @-
836: //case 'F': // F-
837: //case 'K': // K-
838: //case 'Q': // Q-
839: //case 'S': // S-
840: //case 'T': // T-
841: //case 'V': // V-
842: //case '[': // [-
843: //case '\\': // \-
844: //case ']': // ]-
845: //case '_': // _-
846: //case '`': // `-
847: //case 'g': // g-
848: //case 'u': // u- FIXME- there is no undo
849: //case 'v': // v-
850: default: // unrecognised command
851: buf[0] = c;
852: buf[1] = '\0';
853: if (c <= ' ') {
854: buf[0] = '^';
855: buf[1] = c + '@';
856: buf[2] = '\0';
857: }
858: ni ((Byte *) buf);
859: end_cmd_q (); // stop adding to q
860: case 0x00: // nul- ignore
861: break;
862: case 2: // ctrl-B scroll up full screen
863: case VI_K_PAGEUP: // Cursor Key Page Up
864: dot_scroll (rows - 2, -1);
865: break;
866: #ifdef BB_FEATURE_VI_USE_SIGNALS
867: case 0x03: // ctrl-C interrupt
868: longjmp (restart, 1);
869: break;
870: case 26: // ctrl-Z suspend
871: suspend_sig (SIGTSTP);
872: break;
873: #endif /* BB_FEATURE_VI_USE_SIGNALS */
874: case 4: // ctrl-D scroll down half screen
875: dot_scroll ((rows - 2) / 2, 1);
876: break;
877: case 5: // ctrl-E scroll down one line
878: dot_scroll (1, 1);
879: break;
880: case 6: // ctrl-F scroll down full screen
881: case VI_K_PAGEDOWN: // Cursor Key Page Down
882: dot_scroll (rows - 2, 1);
883: break;
884: case 7: // ctrl-G show current status
885: edit_status ();
886: break;
887: case 'h': // h- move left
888: case VI_K_LEFT: // cursor key Left
889: case 8: // ctrl-H- move left (This may be ERASE char)
890: case 127: // DEL- move left (This may be ERASE char)
891: do {
892: dot_left ();
893: } while (cmdcnt-- > 1);
894: break;
895: case 10: // Newline ^J
896: case 'j': // j- goto next line, same col
897: case VI_K_DOWN: // cursor key Down
898: do {
899: dot_next(); // go to next B-o-l
900: dot = move_to_col(dot, ccol + offset); // try stay in same col
901: } while (cmdcnt-- > 1);
902: break;
903: case 12: // ctrl-L force redraw whole screen
904: case 18: // ctrl-R force redraw
905: place_cursor (0, 0, FALSE); // put cursor in correct place
906: clear_to_eos (); // tel terminal to erase display
907: (void) mysleep (10);
908: screen_erase (); // erase the internal screen buffer
909: refresh (TRUE); // this will redraw the entire display
910: break;
911: case 13: // Carriage Return ^M
912: case '+': // +- goto next line
913: do {
914: dot_next();
915: dot_skip_over_ws();
916: } while (cmdcnt-- > 1);
917: break;
918: case 21: // ctrl-U scroll up half screen
919: dot_scroll ((rows - 2) / 2, -1);
920: break;
921: case 25: // ctrl-Y scroll up one line
922: dot_scroll (1, -1);
923: break;
924: case 27: // esc
925: if (cmd_mode == 0)
926: indicate_error (c);
927: cmd_mode = 0; // stop insrting
928: end_cmd_q ();
929: *status_buffer = '\0'; // clear status buffer
930: break;
931: case ' ': // move right
932: case 'l': // move right
933: case VI_K_RIGHT: // Cursor Key Right
934: do {
935: dot_right();
936: } while (cmdcnt-- > 1);
937: break;
938: #ifdef BB_FEATURE_VI_YANKMARK
939: case '"': // "- name a register to use for Delete/Yank
940: c1 = get_one_char ();
941: c1 = tolower (c1);
942: if (islower(c1)) {
943: YDreg = c1 - 'a';
944: } else {
945: indicate_error (c);
946: }
947: break;
948: case '\'': // '- goto a specific mark
949: c1 = get_one_char ();
950: c1 = tolower (c1);
951: if (islower(c1)) {
952: c1 = c1 - 'a';
953: // get the b-o-l
954: q = mark[(int) c1];
955: if (text <= q && q < end) {
956: dot = q;
957: dot_begin (); // go to B-o-l
958: dot_skip_over_ws ();
959: }
960: } else if (c1 == '\'') { // goto previous context
961: dot = swap_context (dot); // swap current and previous context
962: dot_begin (); // go to B-o-l
963: dot_skip_over_ws ();
964: } else {
965: indicate_error (c);
966: }
967: break;
968: case 'm': // m- Mark a line
969: // this is really stupid. If there are any inserts or deletes
970: // between text[0] and dot then this mark will not point to the
971: // correct location! It could be off by many lines!
972: // Well..., at least its quick and dirty.
973: c1 = get_one_char ();
974: c1 = tolower (c1);
975: if (islower(c1)) {
976: c1 = c1 - 'a';
977: // remember the line
978: mark[(int) c1] = dot;
979: } else {
980: indicate_error (c);
981: }
982: break;
983: case 'P': // P- Put register before
984: case 'p': // p- put register after
985: p = reg[YDreg];
986: if (p == 0) {
987: psbs ("Nothing in register %c", what_reg ());
988: break;
989: }
990: // are we putting whole lines or strings
991: if (strchr((char *) p, '\n') != NULL) {
992: if (c == 'P') {
993: dot_begin (); // putting lines- Put above
994: }
995: if (c == 'p') {
996: // are we putting after very last line?
997: if (end_line (dot) == (end - 1)) {
998: dot = end; // force dot to end of text[]
999: } else {
1000: dot_next (); // next line, then put before
1001: }
1002: }
1003: } else {
1004: if (c == 'p')
1005: dot_right (); // move to right, can move to NL
1006: }
1007: dot = string_insert (dot, p); // insert the string
1008: end_cmd_q (); // stop adding to q
1009: break;
1010: case 'U': // U- Undo; replace current line with original version
1011: if (reg[Ureg] != 0) {
1012: p = begin_line (dot);
1013: q = end_line (dot);
1014: p = text_hole_delete (p, q); // delete cur line
1015: p = string_insert (p, reg[Ureg]); // insert orig line
1016: dot = p;
1017: dot_skip_over_ws ();
1018: }
1019: break;
1020: #endif /* BB_FEATURE_VI_YANKMARK */
1021: case '$': // $- goto end of line
1022: case VI_K_END: // Cursor Key End
1023: do {
1024: dot = end_line(dot + 1);
1025: } while (cmdcnt-- > 1);
1026: break;
1027: case '%': // %- find matching char of pair () [] {}
1028: for (q = dot; q < end && *q != '\n'; q++) {
1029: if (strchr("()[]{}", *q) != NULL) {
1030: // we found half of a pair
1031: p = find_pair (q, *q);
1032: if (p == NULL) {
1033: indicate_error (c);
1034: } else {
1035: dot = p;
1036: }
1037: break;
1038: }
1039: }
1040: if (*q == '\n')
1041: indicate_error (c);
1042: break;
1043: case 'f': // f- forward to a user specified char
1044: last_forward_char = get_one_char (); // get the search char
1045: //
1046: // dont seperate these two commands. 'f' depends on ';'
1047: //
1048: //**** fall thru to ... 'i'
1049: case ';': // ;- look at rest of line for last forward char
1050: if (last_forward_char == 0) break;
1051: do {
1052: q = dot + 1;
1053: while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
1054: q++;
1055: }
1056: if (*q == last_forward_char)
1057: dot = q;
1058: } while (cmdcnt-- > 1);
1059: break;
1060: case '-': // -- goto prev line
1061: do {
1062: dot_prev();
1063: dot_skip_over_ws();
1064: } while (cmdcnt-- > 1);
1065: break;
1066: #ifdef BB_FEATURE_VI_DOT_CMD
1067: case '.': // .- repeat the last modifying command
1068: // Stuff the last_modifying_cmd back into stdin
1069: // and let it be re-executed.
1070: if (last_modifying_cmd != 0) {
1071: ioq = ioq_start = (Byte *) strdup ((char *) last_modifying_cmd);
1072: }
1073: break;
1074: #endif /* BB_FEATURE_VI_DOT_CMD */
1075: #ifdef BB_FEATURE_VI_SEARCH
1076: case '?': // /- search for a pattern
1077: case '/': // /- search for a pattern
1078: buf[0] = c;
1079: buf[1] = '\0';
1080: q = get_input_line (buf); // get input line- use "status line"
1081: if (strlen ((char *) q) == 1)
1082: goto dc3; // if no pat re-use old pat
1083: if (strlen ((char *) q) > 1) { // new pat- save it and find
1084: // there is a new pat
1085: if (last_search_pattern != 0) {
1086: free (last_search_pattern);
1087: }
1088: last_search_pattern = (Byte *) strdup ((char *) q);
1089: goto dc3; // now find the pattern
1090: }
1091: // user changed mind and erased the "/"- do nothing
1092: break;
1093: case 'N': // N- backward search for last pattern
1094: if (last_search_pattern == 0) break;
1095: dir = BACK; // assume BACKWARD search
1096: p = dot - 1;
1097: if (last_search_pattern[0] == '?') {
1098: dir = FORWARD;
1099: p = dot + 1;
1100: }
1101: goto dc4; // now search for pattern
1102: break;
1103: case 'n': // n- repeat search for last pattern
1104: // search rest of text[] starting at next char
1105: // if search fails return orignal "p" not the "p+1" address
1106: dc3:
1107: if (last_search_pattern == 0) {
1108: msg = (Byte *) "No previous regular expression";
1109: goto dc2;
1110: }
1111: if (last_search_pattern[0] == '/') {
1112: dir = FORWARD; // assume FORWARD search
1113: p = dot + 1;
1114: }
1115: if (last_search_pattern[0] == '?') {
1116: dir = BACK;
1117: p = dot - 1;
1118: }
1119: dc4:
1120: msg = NULL;
1121: do {
1122: q = char_search (p, last_search_pattern + 1, dir, FULL);
1123: if (q != NULL) {
1124: dot = q; // good search, update "dot"
1125: if (cmdcnt-- > 1) {
1126: p = dot + ((dir == FORWARD) ? 1 : -1);
1127: goto dc4;
1128: }
1129: msg = (Byte *) " ";
1130: goto dc2;
1131: }
1132: // no pattern found between "dot" and "end"- continue at top
1133: p = text;
1134: if (dir == BACK) {
1135: p = end - 1;
1136: }
1137: q = char_search (p, last_search_pattern + 1, dir, FULL);
1138: if (q != NULL) { // found something
1139: dot = q; // found new pattern- goto it
1140: msg = (Byte *) "search hit BOTTOM, continuing at TOP";
1141: if (dir == BACK) {
1142: msg = (Byte *) "search hit TOP, continuing at BOTTOM";
1143: }
1144: } else {
1145: msg = (Byte *) "Pattern not found";
1146: }
1147: } while (msg == NULL && (cmdcnt-- > 1));
1148: dc2:
1149: psbs ("%s", msg);
1150: break;
1151: case '{': // {- move backward paragraph
1152: do {
1153: q = char_search(dot, (Byte *) "\n\n", BACK, FULL);
1154: if (q != NULL) { // found blank line
1155: dot = next_line(q); // move to next blank line
1156: }
1157: } while (cmdcnt-- > 1);
1158: break;
1159: case '}': // }- move forward paragraph
1160: do {
1161: q = char_search(dot, (Byte *) "\n\n", FORWARD, FULL);
1162: if (q != NULL) { // found blank line
1163: dot = next_line(q); // move to next blank line
1164: }
1165: } while (cmdcnt-- > 1);
1166: break;
1167: #endif /* BB_FEATURE_VI_SEARCH */
1168: case '0': // 0- goto begining of line
1169: case '1': // 1-
1170: case '2': // 2-
1171: case '3': // 3-
1172: case '4': // 4-
1173: case '5': // 5-
1174: case '6': // 6-
1175: case '7': // 7-
1176: case '8': // 8-
1177: case '9': // 9-
1178: if (c == '0' && cmdcnt < 1) {
1179: dot_begin (); // this was a standalone zero
1180: } else {
1181: cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
1182: if (cmdcnt > 65536) cmdcnt = 65536; // arbitrary
1183: }
1184: break;
1185: case ':': // :- the colon mode commands
1186: p = get_input_line ((Byte *) ":"); // get input line- use "status line"
1187: #ifdef BB_FEATURE_VI_COLON
1188: colon (p); // execute the command
1189: #else /* BB_FEATURE_VI_COLON */
1190: if (*p == ':')
1191: p++; // move past the ':'
1192: cnt = strlen ((char *) p);
1193: if (cnt <= 0)
1194: break;
1195: if (strncasecmp((char *) p, "quit", cnt) == 0 ||
1196: strncasecmp((char *) p, "q!", cnt) == 0) { // delete lines
1197: if (file_modified == TRUE && p[1] != '!') {
1198: psbs ("No write since last change (:quit! overrides)");
1199: } else {
1200: editing = 0;
1201: }
1202: } else if (strncasecmp((char *) p, "write", cnt) == 0 ||
1203: strncasecmp((char *) p, "wq", cnt) == 0) {
1204: cnt = file_write (cfn, text, end - 1);
1205: file_modified = FALSE;
1206: psb ("\"%s\" %dL, %dC", cfn, count_lines (text, end - 1), cnt);
1207: if (p[1] == 'q') {
1208: editing = 0;
1209: }
1210: } else if (strncasecmp((char *) p, "file", cnt) == 0) {
1211: edit_status (); // show current file status
1212: } else if (sscanf ((char *) p, "%d", &j) > 0) {
1213: dot = find_line (j); // go to line # j
1214: dot_skip_over_ws ();
1215: } else { // unrecognised cmd
1216: ni ((Byte *) p);
1217: }
1218: #endif /* BB_FEATURE_VI_COLON */
1219: break;
1220: case '<': // <- Left shift something
1221: case '>': // >- Right shift something
1222: cnt = count_lines (text, dot); // remember what line we are on
1223: c1 = get_one_char (); // get the type of thing to delete
1224: find_range (&p, &q, c1);
1225: (void) yank_delete (p, q, 1, YANKONLY); // save copy before change
1226: p = begin_line (p);
1227: q = end_line (q);
1228: i = count_lines (p, q); // # of lines we are shifting
1229: for (; i > 0; i--, p = next_line(p)) {
1230: if (c == '<') {
1231: // shift left- remove tab or 8 spaces
1232: if (*p == '\t') {
1233: // shrink buffer 1 char
1234: (void) text_hole_delete (p, p);
1235: } else if (*p == ' ') {
1236: // we should be calculating columns, not just SPACE
1237: for (j = 0; *p == ' ' && j < tabstop; j++) {
1238: (void) text_hole_delete (p, p);
1239: }
1240: }
1241: } else if (c == '>') {
1242: // shift right -- add tab or 8 spaces
1243: (void) char_insert (p, '\t');
1244: }
1245: }
1246: dot = find_line (cnt); // what line were we on
1247: dot_skip_over_ws ();
1248: end_cmd_q (); // stop adding to q
1249: break;
1250: case 'A': // A- append at e-o-l
1251: dot_end (); // go to e-o-l
1252: //**** fall thru to ... 'a'
1253: case 'a': // a- append after current char
1254: if (*dot != '\n')
1255: dot++;
1256: goto dc_i;
1257: break;
1258: case 'B': // B- back a blank-delimited Word
1259: case 'E': // E- end of a blank-delimited word
1260: case 'W': // W- forward a blank-delimited word
1261: dir = ((c == 'B') ? BACK : FORWARD);
1262: do {
1263: if (c == 'W' || isspace(dot[dir])) {
1264: dot = skip_thing (dot, 1, dir, S_TO_WS);
1265: dot = skip_thing (dot, 2, dir, S_OVER_WS);
1266: }
1267: if (c != 'W')
1268: dot = skip_thing (dot, 1, dir, S_BEFORE_WS);
1269: } while (cmdcnt-- > 1);
1270: break;
1271: case 'C': // C- Change to e-o-l
1272: case 'D': // D- delete to e-o-l
1273: save_dot = dot;
1274: dot = dollar_line (dot); // move to before NL
1275: // copy text into a register and delete
1276: dot = yank_delete (save_dot, dot, 0, YANKDEL); // delete to e-o-l
1277: if (c == 'C')
1278: goto dc_i; // start inserting
1279: #ifdef BB_FEATURE_VI_DOT_CMD
1280: if (c == 'D')
1281: end_cmd_q (); // stop adding to q
1282: #endif /* BB_FEATURE_VI_DOT_CMD */
1283: break;
1284: case 'G': // G- goto to a line number (default= E-O-F)
1285: dot = end - 1; // assume E-O-F
1286: if (cmdcnt > 0) {
1287: dot = find_line (cmdcnt); // what line is #cmdcnt
1288: }
1289: dot_skip_over_ws ();
1290: break;
1291: case 'H': // H- goto top line on screen
1292: dot = screenbegin;
1293: if (cmdcnt > (rows - 1)) {
1294: cmdcnt = (rows - 1);
1295: }
1296: if (cmdcnt-- > 1) {
1297: do_cmd ('+');
1298: } // repeat cnt
1299: dot_skip_over_ws ();
1300: break;
1301: case 'I': // I- insert before first non-blank
1302: dot_begin (); // 0
1303: dot_skip_over_ws ();
1304: //**** fall thru to ... 'i'
1305: case 'i': // i- insert before current char
1306: case VI_K_INSERT: // Cursor Key Insert
1307: dc_i:
1308: cmd_mode = 1; // start insrting
1309: psb ("-- Insert --");
1310: break;
1311: case 'J': // J- join current and next lines together
1312: do {
1313: dot_end (); // move to NL
1314: if (dot < end - 1) { // make sure not last char in text[]
1315: *dot++ = ' '; // replace NL with space
1316: while (isblnk(*dot)) { // delete leading WS
1317: dot_delete ();
1318: }
1319: }
1320: end_cmd_q (); // stop adding to q
1321: } while (cmdcnt-- > 2);
1322: break;
1323: case 'L': // L- goto bottom line on screen
1324: dot = end_screen ();
1325: if (cmdcnt > (rows - 1)) {
1326: cmdcnt = (rows - 1);
1327: }
1328: if (cmdcnt-- > 1) {
1329: do_cmd ('-');
1330: } // repeat cnt
1331: dot_begin ();
1332: dot_skip_over_ws ();
1333: break;
1334: case 'M': // M- goto middle line on screen
1335: dot = screenbegin;
1336: for (cnt = 0; cnt < (rows - 1) / 2; cnt++)
1337: dot = next_line (dot);
1338: break;
1339: case 'O': // O- open a empty line above
1340: // 0i\n ESC -i
1341: p = begin_line (dot);
1342: if (p[-1] == '\n') {
1343: dot_prev ();
1344: case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
1345: dot_end ();
1346: dot = char_insert (dot, '\n');
1347: } else {
1348: dot_begin (); // 0
1349: dot = char_insert (dot, '\n'); // i\n ESC
1350: dot_prev (); // -
1351: }
1352: goto dc_i;
1353: break;
1354: case 'R': // R- continuous Replace char
1355: dc5:
1356: cmd_mode = 2;
1357: psb ("-- Replace --");
1358: break;
1359: case 'X': // X- delete char before dot
1360: case 'x': // x- delete the current char
1361: case 's': // s- substitute the current char
1362: dir = (c == 'X') ? -1 : 0;
1363: do {
1364: if (dot[dir] != '\n') {
1365: if (c == 'X')
1366: dot--; // delete prev char
1367: dot = yank_delete (dot, dot, 0, YANKDEL); // delete char
1368: }
1369: } while (cmdcnt-- > 1);
1370: if (c == 's')
1371: goto dc_i; // start insrting
1372: end_cmd_q (); // stop adding to q
1373: break;
1374: case 'Z': // Z- if modified, {write}; exit
1375: // ZZ means to save file (if necessary), then exit
1376: c1 = get_one_char ();
1377: if (c1 != 'Z') {
1378: indicate_error (c);
1379: break;
1380: }
1381: if (file_modified == TRUE
1382: #ifdef BB_FEATURE_VI_READONLY
1383: && vi_readonly == FALSE
1384: && readonly == FALSE
1385: #endif /* BB_FEATURE_VI_READONLY */
1386: ) {
1387: cnt = file_write (cfn, text, end - 1);
1388: if (cnt == (end - 1 - text + 1)) {
1389: editing = 0;
1390: }
1391: } else {
1392: editing = 0;
1393: }
1394: break;
1395: case '^': // ^- move to first non-blank on line
1396: dot_begin ();
1397: dot_skip_over_ws ();
1398: break;
1399: case 'b': // b- back a word
1400: case 'e': // e- end of word
1401: dir = (c == 'b') ? BACK : FORWARD;
1402: do {
1403: if ((dot + dir) < text || (dot + dir) > end - 1)
1404: break;
1405: dot += dir;
1406: if (isspace(*dot)) {
1407: dot = skip_thing (dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
1408: }
1409: if (isalnum(*dot) || *dot == '_') {
1410: dot = skip_thing (dot, 1, dir, S_END_ALNUM);
1411: } else if (ispunct(*dot)) {
1412: dot = skip_thing (dot, 1, dir, S_END_PUNCT);
1413: }
1414: } while (cmdcnt-- > 1);
1415: break;
1416: case 'c': // c- change something
1417: case 'd': // d- delete something
1418: #ifdef BB_FEATURE_VI_YANKMARK
1419: case 'y': // y- yank something
1420: case 'Y': // Y- Yank a line
1421: #endif /* BB_FEATURE_VI_YANKMARK */
1422: yf = YANKDEL; // assume either "c" or "d"
1423: #ifdef BB_FEATURE_VI_YANKMARK
1424: if (c == 'y' || c == 'Y')
1425: yf = YANKONLY;
1426: #endif /* BB_FEATURE_VI_YANKMARK */
1427: c1 = 'y';
1428: if (c != 'Y')
1429: c1 = get_one_char (); // get the type of thing to delete
1430: find_range (&p, &q, c1);
1431: if (c1 == 27) { // ESC- user changed mind and wants out
1432: c = c1 = 27; // Escape- do nothing
1433: } else if (strchr("wW", c1)) {
1434: if (c == 'c') {
1435: // don't include trailing WS as part of word
1436: while (isblnk(*q)) {
1437: if (q <= text || q[-1] == '\n')
1438: break;
1439: q--;
1440: }
1441: }
1442: dot = yank_delete (p, q, 0, yf); // delete word
1443: } else if (strchr("^0bBeEft$", c1)) {
1444: // single line copy text into a register and delete
1445: dot = yank_delete (p, q, 0, yf); // delete word
1446: } else if (strchr("cdykjHL%+-{}\r\n", c1)) {
1447: // multiple line copy text into a register and delete
1448: dot = yank_delete (p, q, 1, yf); // delete lines
1449: if (c == 'c') {
1450: dot = char_insert (dot, '\n');
1451: // on the last line of file don't move to prev line
1452: if (dot != (end - 1)) {
1453: dot_prev ();
1454: }
1455: } else if (c == 'd') {
1456: dot_begin ();
1457: dot_skip_over_ws ();
1458: }
1459: } else {
1460: // could not recognize object
1461: c = c1 = 27; // error-
1462: indicate_error (c);
1463: }
1464: if (c1 != 27) {
1465: // if CHANGING, not deleting, start inserting after the delete
1466: if (c == 'c') {
1467: strcpy ((char *) buf, "Change");
1468: goto dc_i; // start inserting
1469: }
1470: if (c == 'd') {
1471: strcpy ((char *) buf, "Delete");
1472: }
1473: #ifdef BB_FEATURE_VI_YANKMARK
1474: if (c == 'y' || c == 'Y') {
1475: strcpy ((char *) buf, "Yank");
1476: }
1477: p = reg[YDreg];
1478: q = p + strlen ((char *) p);
1479: for (cnt = 0; p <= q; p++) {
1480: if (*p == '\n')
1481: cnt++;
1482: }
1483: psb ("%s %d lines (%d chars) using [%c]",
1484: buf, cnt, strlen ((char *) reg[YDreg]), what_reg ());
1485: #endif /* BB_FEATURE_VI_YANKMARK */
1486: end_cmd_q (); // stop adding to q
1487: }
1488: break;
1489: case 'k': // k- goto prev line, same col
1490: case VI_K_UP: // cursor key Up
1491: do {
1492: dot_prev();
1493: dot = move_to_col(dot, ccol + offset); // try stay in same col
1494: } while (cmdcnt-- > 1);
1495: break;
1496: case 'r': // r- replace the current char with user input
1497: c1 = get_one_char (); // get the replacement char
1498: if (*dot != '\n') {
1499: *dot = c1;
1500: file_modified = TRUE; // has the file been modified
1501: }
1502: end_cmd_q (); // stop adding to q
1503: break;
1504: case 't': // t- move to char prior to next x
1505: last_forward_char = get_one_char ();
1506: do_cmd (';');
1507: if (*dot == last_forward_char)
1508: dot_left ();
1509: last_forward_char = 0;
1510: break;
1511: case 'w': // w- forward a word
1512: do {
1513: if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
1514: dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
1515: } else if (ispunct(*dot)) { // we are on PUNCT
1516: dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
1517: }
1518: if (dot < end - 1)
1519: dot++; // move over word
1520: if (isspace(*dot)) {
1521: dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
1522: }
1523: } while (cmdcnt-- > 1);
1524: break;
1525: case 'z': // z-
1526: c1 = get_one_char (); // get the replacement char
1527: cnt = 0;
1528: if (c1 == '.')
1529: cnt = (rows - 2) / 2; // put dot at center
1530: if (c1 == '-')
1531: cnt = rows - 2; // put dot at bottom
1532: screenbegin = begin_line (dot); // start dot at top
1533: dot_scroll (cnt, -1);
1534: break;
1535: case '|': // |- move to column "cmdcnt"
1536: dot = move_to_col (dot, cmdcnt - 1); // try to move to column
1537: break;
1538: case '~': // ~- flip the case of letters a-z -> A-Z
1539: do {
1540: if (islower(*dot)) {
1541: *dot = toupper(*dot);
1542: file_modified = TRUE; // has the file been modified
1543: } else if (isupper(*dot)) {
1544: *dot = tolower(*dot);
1545: file_modified = TRUE; // has the file been modified
1546: }
1547: dot_right();
1548: } while (cmdcnt-- > 1);
1549: end_cmd_q (); // stop adding to q
1550: break;
1551: //----- The Cursor and Function Keys -----------------------------
1552: case VI_K_HOME: // Cursor Key Home
1553: dot_begin ();
1554: break;
1555: // The Fn keys could point to do_macro which could translate them
1556: case VI_K_FUN1: // Function Key F1
1557: case VI_K_FUN2: // Function Key F2
1558: case VI_K_FUN3: // Function Key F3
1559: case VI_K_FUN4: // Function Key F4
1560: case VI_K_FUN5: // Function Key F5
1561: case VI_K_FUN6: // Function Key F6
1562: case VI_K_FUN7: // Function Key F7
1563: case VI_K_FUN8: // Function Key F8
1564: case VI_K_FUN9: // Function Key F9
1565: case VI_K_FUN10: // Function Key F10
1566: case VI_K_FUN11: // Function Key F11
1567: case VI_K_FUN12: // Function Key F12
1568: break;
1569: }
1570:
1571: dc1:
1572: // if text[] just became empty, add back an empty line
1573: if (end == text) {
1574: (void) char_insert (text, '\n'); // start empty buf with dummy line
1575: dot = text;
1576: }
1577: // it is OK for dot to exactly equal to end, otherwise check dot validity
1578: if (dot != end) {
1579: dot = bound_dot (dot); // make sure "dot" is valid
1580: }
1581: #ifdef BB_FEATURE_VI_YANKMARK
1582: check_context (c); // update the current context
1583: #endif /* BB_FEATURE_VI_YANKMARK */
1584:
1585: if (!isdigit (c))
1586: cmdcnt = 0; // cmd was not a number, reset cmdcnt
1587: cnt = dot - begin_line (dot);
1588: // Try to stay off of the Newline
1589: if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
1590: dot--;
1591: }
1592:
1593: //----- The Colon commands -------------------------------------
1594: #ifdef BB_FEATURE_VI_COLON
1595: static Byte *get_one_address(Byte * p, int *addr) // get colon addr, if present
1596: {
1597: int st;
1598: Byte *q;
1599:
1600: #ifdef BB_FEATURE_VI_YANKMARK
1601: Byte c;
1602: #endif /* BB_FEATURE_VI_YANKMARK */
1603: #ifdef BB_FEATURE_VI_SEARCH
1604: Byte *pat, buf[BUFSIZ];
1605: #endif /* BB_FEATURE_VI_SEARCH */
1606:
1607: *addr = -1; // assume no addr
1608: if (*p == '.') { // the current line
1609: p++;
1610: q = begin_line (dot);
1611: *addr = count_lines (text, q);
1612: #ifdef BB_FEATURE_VI_YANKMARK
1613: } else if (*p == '\'') { // is this a mark addr
1614: p++;
1615: c = tolower (*p);
1616: p++;
1617: if (c >= 'a' && c <= 'z') {
1618: // we have a mark
1619: c = c - 'a';
1620: q = mark[(int) c];
1621: if (q != NULL) { // is mark valid
1622: *addr = count_lines (text, q); // count lines
1623: }
1624: }
1625: #endif /* BB_FEATURE_VI_YANKMARK */
1626: #ifdef BB_FEATURE_VI_SEARCH
1627: } else if (*p == '/') { // a search pattern
1628: q = buf;
1629: for (p++; *p; p++) {
1630: if (*p == '/')
1631: break;
1632: *q++ = *p;
1633: *q = '\0';
1634: }
1635: pat = (Byte *) strdup ((char *) buf); // save copy of pattern
1636: if (*p == '/')
1637: p++;
1638: q = char_search (dot, pat, FORWARD, FULL);
1639: if (q != NULL) {
1640: *addr = count_lines (text, q);
1641: }
1642: free (pat);
1643: #endif /* BB_FEATURE_VI_SEARCH */
1644: } else if (*p == '$') { // the last line in file
1645: p++;
1646: q = begin_line (end - 1);
1647: *addr = count_lines (text, q);
1648: } else if (isdigit(*p)) { // specific line number
1649: sscanf ((char *) p, "%d%n", addr, &st);
1650: p += st;
1651: } else { // I don't reconise this
1652: // unrecognised address- assume -1
1653: *addr = -1;
1654: }
1655: return (p);
1656: }
1657:
1658: static Byte *get_address(Byte * p, int *b, int *e) // get two colon addrs, if present
1659: {
1660: //----- get the address' i.e., 1,3 'a,'b -----
1661: // get FIRST addr, if present
1662: while (isblnk (*p))
1663: p++; // skip over leading spaces
1664: if (*p == '%') { // alias for 1,$
1665: p++;
1666: *b = 1;
1667: *e = count_lines (text, end - 1);
1668: goto ga0;
1669: }
1670: p = get_one_address (p, b);
1671: while (isblnk (*p))
1672: p++;
1673: if (*p == ',') { // is there a address seperator
1674: p++;
1675: while (isblnk (*p))
1676: p++;
1677: // get SECOND addr, if present
1678: p = get_one_address (p, e);
1679: }
1680: ga0:
1681: while (isblnk (*p))
1682: p++; // skip over trailing spaces
1683: return (p);
1684: }
1685:
1686: static void colon(Byte * buf)
1687: {
1688: Byte c, *orig_buf, *buf1, *q, *r;
1689: Byte *fn, cmd[BUFSIZ], args[BUFSIZ];
1690: int i, l, li, ch, st, b, e;
1691: int useforce, forced;
1692: struct stat st_buf;
1693:
1694: // :3154 // if (-e line 3154) goto it else stay put
1695: // :4,33w! foo // write a portion of buffer to file "foo"
1696: // :w // write all of buffer to current file
1697: // :q // quit
1698: // :q! // quit- dont care about modified file
1699: // :'a,'z!sort -u // filter block through sort
1700: // :'f // goto mark "f"
1701: // :'fl // list literal the mark "f" line
1702: // :.r bar // read file "bar" into buffer before dot
1703: // :/123/,/abc/d // delete lines from "123" line to "abc" line
1704: // :/xyz/ // goto the "xyz" line
1705: // :s/find/replace/ // substitute pattern "find" with "replace"
1706: // :!<cmd> // run <cmd> then return
1707: //
1708: if (strlen ((char *) buf) <= 0)
1709: goto vc1;
1710: if (*buf == ':')
1711: buf++; // move past the ':'
1712:
1713: forced = useforce = FALSE;
1714: li = st = ch = i = 0;
1715: b = e = -1;
1716: q = text; // assume 1,$ for the range
1717: r = end - 1;
1718: li = count_lines (text, end - 1);
1719: fn = cfn; // default to current file
1720: memset (cmd, '\0', BUFSIZ); // clear cmd[]
1721: memset (args, '\0', BUFSIZ); // clear args[]
1722:
1723: // look for optional address(es) :. :1 :1,9 :'q,'a :%
1724: buf = get_address (buf, &b, &e);
1725:
1726: // remember orig command line
1727: orig_buf = buf;
1728:
1729: // get the COMMAND into cmd[]
1730: buf1 = cmd;
1731: while (*buf != '\0') {
1732: if (isspace (*buf))
1733: break;
1734: *buf1++ = *buf++;
1735: }
1736: // get any ARGuments
1737: while (isblnk (*buf))
1738: buf++;
1739: /* FIXED strcpy((char *) args, (char *) buf); */
1740: if (strlcpy((char *) args, (char *) buf, sizeof((char *)args)) > sizeof((char *)args)) err(1, "strlcpy overflow in function colon");
1741: buf1 = (Byte *)last_char_is((char *)cmd, '!');
1742: if (buf1) {
1743: useforce = TRUE;
1744: *buf1 = '\0'; // get rid of !
1745: }
1746: if (b >= 0) {
1747: // if there is only one addr, then the addr
1748: // is the line number of the single line the
1749: // user wants. So, reset the end
1750: // pointer to point at end of the "b" line
1751: q = find_line (b); // what line is #b
1752: r = end_line (q);
1753: li = 1;
1754: }
1755: if (e >= 0) {
1756: // we were given two addrs. change the
1757: // end pointer to the addr given by user.
1758: r = find_line (e); // what line is #e
1759: r = end_line (r);
1760: li = e - b + 1;
1761: }
1762: // ------------ now look for the command ------------
1763: i = strlen ((char *) cmd);
1764: if (i == 0) { // :123CR goto line #123
1765: if (b >= 0) {
1766: dot = find_line (b); // what line is #b
1767: dot_skip_over_ws ();
1768: }
1769: } else if (0) {
1770: // } else if (strncmp((char *) cmd, "!", 1) == 0) { // run a cmd
1771: // :!ls run the <cmd>
1772: (void) alarm(0); // wait for input- no alarms
1773: place_cursor (rows - 1, 0, FALSE); // go to Status line
1774: clear_to_eol (); // clear the line
1775: cookmode ();
1776: system((char *)orig_buf+1); // run the cmd
1777: rawmode ();
1778: Hit_Return (); // let user see results
1779: (void) alarm(3); // done waiting for input
1780: } else if (strncmp((char *) cmd, "=", i) == 0) { // where is the address
1781: if (b < 0) { // no addr given- use defaults
1782: b = e = count_lines (text, dot);
1783: }
1784: psb ("%d", b);
1785: } else if (strncasecmp((char *) cmd, "delete", i) == 0) { // delete lines
1786: if (b < 0) { // no addr given- use defaults
1787: q = begin_line (dot); // assume .,. for the range
1788: r = end_line (dot);
1789: }
1790: dot = yank_delete (q, r, 1, YANKDEL); // save, then delete lines
1791: dot_skip_over_ws ();
1792: } else if (0) {
1793: // } else if (strncasecmp((char *) cmd, "edit", i) == 0) { // Edit a file
1794: int sr;
1795: sr = 0;
1796: // don't edit, if the current file has been modified
1797: if (file_modified == TRUE && useforce != TRUE) {
1798: psbs ("No write since last change (:edit! overrides)");
1799: goto vc1;
1800: }
1801: if (strlen((char *)args) > 0) {
1802: // the user supplied a file name
1803: fn = args;
1804: } else if (cfn != 0 && strlen((char *)cfn) > 0) {
1805: // no user supplied name- use the current filename
1806: fn = cfn;
1807: goto vc5;
1808: } else {
1809: // no user file name, no current name- punt
1810: psbs ("No current filename");
1811: goto vc1;
1812: }
1813:
1814: // see if file exists- if not, its just a new file request
1815: if ((sr = stat((char *) fn, &st_buf)) < 0) {
1816: // This is just a request for a new file creation.
1817: // The file_insert below will fail but we get
1818: // an empty buffer with a file name. Then the "write"
1819: // command can do the create.
1820: } else {
1821: if ((st_buf.st_mode & (S_IFREG)) == 0) {
1822: // This is not a regular file
1823: psbs ("\"%s\" is not a regular file", fn);
1824: goto vc1;
1825: }
1826: if ((st_buf.st_mode & (S_IRUSR | S_IRGRP | S_IROTH)) == 0) {
1827: // dont have any read permissions
1828: psbs ("\"%s\" is not readable", fn);
1829: goto vc1;
1830: }
1831: }
1832:
1833: // There is a read-able regular file
1834: // make this the current file
1835: q = (Byte *) strdup ((char *) fn); // save the cfn
1836: if (cfn != 0)
1837: free (cfn); // free the old name
1838: cfn = q; // remember new cfn
1839:
1840: vc5:
1841: // delete all the contents of text[]
1842: new_text (2 * file_size (fn));
1843: screenbegin = dot = end = text;
1844:
1845: // insert new file
1846: ch = file_insert (fn, text, file_size (fn));
1847:
1848: if (ch < 1) {
1849: // start empty buf with dummy line
1850: (void) char_insert (text, '\n');
1851: ch = 1;
1852: }
1853: file_modified = FALSE;
1854: #ifdef BB_FEATURE_VI_YANKMARK
1855: if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
1856: free (reg[Ureg]); // free orig line reg- for 'U'
1857: reg[Ureg] = 0;
1858: }
1859: if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
1860: free (reg[YDreg]); // free default yank/delete register
1861: reg[YDreg] = 0;
1862: }
1863: for (li = 0; li < 28; li++) {
1864: mark[li] = 0;
1865: } // init the marks
1866: #endif /* BB_FEATURE_VI_YANKMARK */
1867: // how many lines in text[]?
1868: li = count_lines (text, end - 1);
1869: psb ("\"%s\"%s"
1870: #ifdef BB_FEATURE_VI_READONLY
1871: "%s"
1872: #endif /* BB_FEATURE_VI_READONLY */
1873: " %dL, %dC", cfn,
1874: (sr < 0 ? " [New file]" : ""),
1875: #ifdef BB_FEATURE_VI_READONLY
1876: ((vi_readonly == TRUE || readonly == TRUE) ? " [Read only]" : ""),
1877: #endif /* BB_FEATURE_VI_READONLY */
1878: li, ch);
1879: }
1880: else if (0) {
1881: // } else if (strncasecmp((char *) cmd, "file", i) == 0) { // what File is this
1882: if (b != -1 || e != -1) {
1883: ni ((Byte *) "No address allowed on this command");
1884: goto vc1;
1885: }
1886: if (strlen ((char *) args) > 0) {
1887: // user wants a new filename
1888: if (cfn != NULL)
1889: free (cfn);
1890: cfn = (Byte *) strdup ((char *) args);
1891: } else {
1892: // user wants file status info
1893: edit_status ();
1894: }
1895: } else if (strncasecmp ((char *) cmd, "features", i) == 0) { // what features are available
1896: // print out values of all features
1897: place_cursor (rows - 1, 0, FALSE); // go to Status line, bottom of screen
1898: clear_to_eol (); // clear the line
1899: cookmode ();
1900: show_help ();
1901: rawmode ();
1902: Hit_Return ();
1903: } else if (strncasecmp ((char *) cmd, "list", i) == 0) { // literal print line
1904: if (b < 0) { // no addr given- use defaults
1905: q = begin_line (dot); // assume .,. for the range
1906: r = end_line (dot);
1907: }
1908: place_cursor (rows - 1, 0, FALSE); // go to Status line, bottom of screen
1909: clear_to_eol (); // clear the line
1910: write (1, "\r\n", 2);
1911: for (; q <= r; q++) {
1912: c = *q;
1913: if (c > '~')
1914: standout_start ();
1915: if (c == '\n') {
1916: write (1, "$\r", 2);
1917: } else if (*q < ' ') {
1918: write (1, "^", 1);
1919: c += '@';
1920: }
1921: write (1, &c, 1);
1922: if (c > '~')
1923: standout_end ();
1924: }
1925: #ifdef BB_FEATURE_VI_SET
1926: vc2:
1927: #endif /* BB_FEATURE_VI_SET */
1928: Hit_Return ();
1929: } else if ((strncasecmp ((char *) cmd, "quit", i) == 0) || // Quit
1930: (strncasecmp ((char *) cmd, "next", i) == 0)) { // edit next file
1931: if (useforce == TRUE) {
1932: // force end of argv list
1933: if (*cmd == 'q') {
1934: optind = save_argc;
1935: }
1936: editing = 0;
1937: goto vc1;
1938: }
1939: // don't exit if the file been modified
1940: if (file_modified == TRUE) {
1941: psbs ("No write since last change (:%s! overrides)",
1942: (*cmd == 'q' ? "quit" : "next"));
1943: goto vc1;
1944: }
1945: // are there other file to edit
1946: /* if (*cmd == 'q' && optind < save_argc - 1) {
1947: psbs("%d more file to edit", (save_argc - optind - 1));
1948: goto vc1;
1949: }
1950: if (*cmd == 'n' && optind >= save_argc - 1) {
1951: psbs("No more files to edit");
1952: goto vc1;
1953: } */
1954: editing = 0;
1955: } else if (0) {
1956: // } else if (strncasecmp((char *) cmd, "read", i) == 0) { // read file into text[]
1957: fn = args;
1958: if (strlen ((char *) fn) <= 0) {
1959: psbs ("No filename given");
1960: goto vc1;
1961: }
1962: if (b < 0) { // no addr given- use defaults
1963: q = begin_line (dot); // assume "dot"
1964: }
1965: // read after current line- unless user said ":0r foo"
1966: if (b != 0)
1967: q = next_line (q);
1968: #ifdef BB_FEATURE_VI_READONLY
1969: l = readonly; // remember current files' status
1970: #endif
1971: ch = file_insert (fn, q, file_size (fn));
1972: #ifdef BB_FEATURE_VI_READONLY
1973: readonly = l;
1974: #endif
1975: if (ch < 0)
1976: goto vc1; // nothing was inserted
1977: // how many lines in text[]?
1978: li = count_lines (q, q + ch - 1);
1979: psb ("\"%s\""
1980: #ifdef BB_FEATURE_VI_READONLY
1981: "%s"
1982: #endif /* BB_FEATURE_VI_READONLY */
1983: " %dL, %dC", fn,
1984: #ifdef BB_FEATURE_VI_READONLY
1985: ((vi_readonly == TRUE || readonly == TRUE) ? " [Read only]" : ""),
1986: #endif /* BB_FEATURE_VI_READONLY */
1987: li, ch);
1988: if (ch > 0) {
1989: // if the insert is before "dot" then we need to update
1990: if (q <= dot)
1991: dot += ch;
1992: file_modified = TRUE;
1993: }
1994: } else if (strncasecmp ((char *) cmd, "rewind", i) == 0) { // rewind cmd line args
1995: if (file_modified == TRUE && useforce != TRUE) {
1996: psbs ("No write since last change (:rewind! overrides)");
1997: } else {
1998: // reset the filenames to edit
1999: optind = fn_start - 1;
2000: editing = 0;
2001: }
2002: #ifdef BB_FEATURE_VI_SET
2003: } else if (strncasecmp ((char *) cmd, "set", i) == 0) { // set or clear features
2004: i = 0; // offset into args
2005: if (strlen ((char *) args) == 0) {
2006: // print out values of all options
2007: place_cursor (rows - 1, 0, FALSE); // go to Status line, bottom of screen
2008: clear_to_eol (); // clear the line
2009: printf ("----------------------------------------\r\n");
2010: #ifdef BB_FEATURE_VI_SETOPTS
2011: if (!autoindent)
2012: printf ("no");
2013: printf ("autoindent ");
2014: if (!err_method)
2015: printf ("no");
2016: printf ("flash ");
2017: if (!ignorecase)
2018: printf ("no");
2019: printf ("ignorecase ");
2020: if (!showmatch)
2021: printf ("no");
2022: printf ("showmatch ");
2023: printf ("tabstop=%d ", tabstop);
2024: #endif /* BB_FEATURE_VI_SETOPTS */
2025: printf ("\r\n");
2026: goto vc2;
2027: }
2028: if (strncasecmp ((char *) args, "no", 2) == 0)
2029: i = 2; // ":set noautoindent"
2030: #ifdef BB_FEATURE_VI_SETOPTS
2031: if (strncasecmp ((char *) args + i, "autoindent", 10) == 0 ||
2032: strncasecmp ((char *) args + i, "ai", 2) == 0) {
2033: autoindent = (i == 2) ? 0 : 1;
2034: }
2035: if (strncasecmp ((char *) args + i, "flash", 5) == 0 ||
2036: strncasecmp ((char *) args + i, "fl", 2) == 0) {
2037: err_method = (i == 2) ? 0 : 1;
2038: }
2039: if (strncasecmp ((char *) args + i, "ignorecase", 10) == 0 ||
2040: strncasecmp ((char *) args + i, "ic", 2) == 0) {
2041: ignorecase = (i == 2) ? 0 : 1;
2042: }
2043: if (strncasecmp ((char *) args + i, "showmatch", 9) == 0 ||
2044: strncasecmp ((char *) args + i, "sm", 2) == 0) {
2045: showmatch = (i == 2) ? 0 : 1;
2046: }
2047: if (strncasecmp ((char *) args + i, "tabstop", 7) == 0) {
2048: sscanf (strchr ((char *) args + i, '='), "=%d", &ch);
2049: if (ch > 0 && ch < columns - 1)
2050: tabstop = ch;
2051: }
2052: #endif /* BB_FEATURE_VI_SETOPTS */
2053: #endif /* BB_FEATURE_VI_SET */
2054: #ifdef BB_FEATURE_VI_SEARCH
2055: } else if (strncasecmp ((char *) cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern
2056: Byte *ls, *F, *R;
2057: int gflag;
2058:
2059: // F points to the "find" pattern
2060: // R points to the "replace" pattern
2061: // replace the cmd line delimiters "/" with NULLs
2062: gflag = 0; // global replace flag
2063: c = orig_buf[1]; // what is the delimiter
2064: F = orig_buf + 2; // start of "find"
2065: R = (Byte *) strchr ((char *) F, c); // middle delimiter
2066: if (!R) goto colon_s_fail;
2067: *R++ = '\0'; // terminate "find"
2068: buf1 = (Byte *) strchr ((char *) R, c);
2069: if (!buf1) goto colon_s_fail;
2070: *buf1++ = '\0'; // terminate "replace"
2071: if (*buf1 == 'g') { // :s/foo/bar/g
2072: buf1++;
2073: gflag++; // turn on gflag
2074: }
2075: q = begin_line (q);
2076: if (b < 0) { // maybe :s/foo/bar/
2077: q = begin_line (dot); // start with cur line
2078: b = count_lines (text, q); // cur line number
2079: }
2080: if (e < 0)
2081: e = b; // maybe :.s/foo/bar/
2082: for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
2083: ls = q; // orig line start
2084: vc4:
2085: buf1 = char_search (q, F, FORWARD, LIMITED); // search cur line only for "find"
2086: if (buf1 != NULL) {
2087: // we found the "find" pattern- delete it
2088: (void) text_hole_delete (buf1, buf1 + strlen ((char *) F) - 1);
2089: // inset the "replace" patern
2090: (void) string_insert (buf1, R); // insert the string
2091: // check for "global" :s/foo/bar/g
2092: if (gflag == 1) {
2093: if ((buf1 + strlen ((char *) R)) < end_line(ls)) {
2094: q = buf1 + strlen ((char *) R);
2095: goto vc4; // don't let q move past cur line
2096: }
2097: }
2098: }
2099: q = next_line (ls);
2100: }
2101: #endif /* BB_FEATURE_VI_SEARCH */
2102: } else if (strncasecmp ((char *) cmd, "version", i) == 0) { // show software version
2103: psb ("%s", vi_Version);
2104: } else if ((strncasecmp ((char *) cmd, "write", i) == 0) || // write text to file
2105: (strncasecmp ((char *) cmd, "wq", i) == 0)) { // write text to file
2106: // is there a file name to write to?
2107: /* if (strlen((char *) args) > 0) {
2108: fn = args;
2109: } */
2110: #ifdef BB_FEATURE_VI_READONLY
2111: if ((vi_readonly == TRUE || readonly == TRUE) && useforce == FALSE) {
2112: psbs ("\"%s\" File is read only", fn);
2113: goto vc3;
2114: }
2115: #endif /* BB_FEATURE_VI_READONLY */
2116: // how many lines in text[]?
2117: li = count_lines (q, r);
2118: ch = r - q + 1;
2119: // see if file exists- if not, its just a new file request
2120: if (useforce == TRUE) {
2121: // if "fn" is not write-able, chmod u+w
2122: // sprintf(syscmd, "chmod u+w %s", fn);
2123: // system(syscmd);
2124: forced = TRUE;
2125: }
2126: l = file_write (fn, q, r);
2127: if (useforce == TRUE && forced == TRUE) {
2128: // chmod u-w
2129: // sprintf(syscmd, "chmod u-w %s", fn);
2130: // system(syscmd);
2131: forced = FALSE;
2132: }
2133: psb ("\"%s\" %dL, %dC", fn, li, l);
2134: if (q == text && r == end - 1 && l == ch)
2135: file_modified = FALSE;
2136: if (cmd[1] == 'q' && l == ch) {
2137: editing = 0;
2138: }
2139: #ifdef BB_FEATURE_VI_READONLY
2140: vc3:;
2141: #endif /* BB_FEATURE_VI_READONLY */
2142: #ifdef BB_FEATURE_VI_YANKMARK
2143: } else if (strncasecmp ((char *) cmd, "yank", i) == 0) { // yank lines
2144: if (b < 0) { // no addr given- use defaults
2145: q = begin_line (dot); // assume .,. for the range
2146: r = end_line (dot);
2147: }
2148: text_yank (q, r, YDreg);
2149: li = count_lines (q, r);
2150: psb ("Yank %d lines (%d chars) into [%c]",
2151: li, strlen ((char *) reg[YDreg]), what_reg ());
2152: #endif /* BB_FEATURE_VI_YANKMARK */
2153: } else {
2154: // cmd unknown
2155: ni ((Byte *) cmd);
2156: }
2157: vc1:
2158: dot = bound_dot (dot); // make sure "dot" is valid
2159: return;
2160: #ifdef BB_FEATURE_VI_SEARCH
2161: colon_s_fail:
2162: psb (":s expression missing delimiters");
2163: return;
2164: #endif
2165:
2166: }
2167:
2168: static void Hit_Return(void)
2169: {
2170: char c;
2171:
2172: standout_start (); // start reverse video
2173: write (1, "[Hit return to continue]", 24);
2174: standout_end (); // end reverse video
2175: while ((c = get_one_char ()) != '\n' && c != '\r') /*do nothing */
2176: ;
2177: redraw (TRUE); // force redraw all
2178: }
2179: #endif /* BB_FEATURE_VI_COLON */
2180:
2181: //----- Synchronize the cursor to Dot --------------------------
2182: static void sync_cursor(Byte * d, int *row, int *col)
2183: {
2184: Byte *beg_cur, *end_cur; // begin and end of "d" line
2185: Byte *beg_scr, *end_scr; // begin and end of screen
2186: Byte *tp;
2187: int cnt, ro, co;
2188:
2189: beg_cur = begin_line (d); // first char of cur line
2190: end_cur = end_line (d); // last char of cur line
2191:
2192: beg_scr = end_scr = screenbegin; // first char of screen
2193: end_scr = end_screen (); // last char of screen
2194:
2195: if (beg_cur < screenbegin) {
2196: // "d" is before top line on screen
2197: // how many lines do we have to move
2198: cnt = count_lines (beg_cur, screenbegin);
2199: sc1:
2200: screenbegin = beg_cur;
2201: if (cnt > (rows - 1) / 2) {
2202: // we moved too many lines. put "dot" in middle of screen
2203: for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
2204: screenbegin = prev_line (screenbegin);
2205: }
2206: }
2207: } else if (beg_cur > end_scr) {
2208: // "d" is after bottom line on screen
2209: // how many lines do we have to move
2210: cnt = count_lines (end_scr, beg_cur);
2211: if (cnt > (rows - 1) / 2)
2212: goto sc1; // too many lines
2213: for (ro = 0; ro < cnt - 1; ro++) {
2214: // move screen begin the same amount
2215: screenbegin = next_line (screenbegin);
2216: // now, move the end of screen
2217: end_scr = next_line (end_scr);
2218: end_scr = end_line (end_scr);
2219: }
2220: }
2221: // "d" is on screen- find out which row
2222: tp = screenbegin;
2223: for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
2224: if (tp == beg_cur)
2225: break;
2226: tp = next_line (tp);
2227: }
2228:
2229: // find out what col "d" is on
2230: co = 0;
2231: do { // drive "co" to correct column
2232: if (*tp == '\n' || *tp == '\0')
2233: break;
2234: if (*tp == '\t') {
2235: // 7 - (co % 8 )
2236: co += ((tabstop - 1) - (co % tabstop));
2237: } else if (*tp < ' ') {
2238: co++; // display as ^X, use 2 columns
2239: }
2240: } while (tp++ < d && ++co);
2241:
2242: // "co" is the column where "dot" is.
2243: // The screen has "columns" columns.
2244: // The currently displayed columns are 0+offset -- columns+ofset
2245: // |-------------------------------------------------------------|
2246: // ^ ^ ^
2247: // offset | |------- columns ----------------|
2248: //
2249: // If "co" is already in this range then we do not have to adjust offset
2250: // but, we do have to subtract the "offset" bias from "co".
2251: // If "co" is outside this range then we have to change "offset".
2252: // If the first char of a line is a tab the cursor will try to stay
2253: // in column 7, but we have to set offset to 0.
2254:
2255: if (co < 0 + offset) {
2256: offset = co;
2257: }
2258: if (co >= columns + offset) {
2259: offset = co - columns + 1;
2260: }
2261: // if the first char of the line is a tab, and "dot" is sitting on it
2262: // force offset to 0.
2263: if (d == beg_cur && *d == '\t') {
2264: offset = 0;
2265: }
2266: co -= offset;
2267:
2268: *row = ro;
2269: *col = co;
2270: }
2271:
2272: //----- Text Movement Routines ---------------------------------
2273: static Byte *begin_line(Byte * p) // return pointer to first char cur line
2274: {
2275: while (p > text && p[-1] != '\n')
2276: p--; // go to cur line B-o-l
2277: return (p);
2278: }
2279:
2280: static Byte *end_line(Byte * p) // return pointer to NL of cur line line
2281: {
2282: while (p < end - 1 && *p != '\n')
2283: p++; // go to cur line E-o-l
2284: return (p);
2285: }
2286:
2287: static Byte *dollar_line(Byte * p) // return pointer to just before NL line
2288: {
2289: while (p < end - 1 && *p != '\n')
2290: p++; // go to cur line E-o-l
2291: // Try to stay off of the Newline
2292: if (*p == '\n' && (p - begin_line (p)) > 0)
2293: p--;
2294: return (p);
2295: }
2296:
2297: static Byte *prev_line(Byte * p) // return pointer first char prev line
2298: {
2299: p = begin_line (p); // goto begining of cur line
2300: if (p[-1] == '\n' && p > text)
2301: p--; // step to prev line
2302: p = begin_line (p); // goto begining of prev line
2303: return (p);
2304: }
2305:
2306: static Byte *next_line(Byte * p) // return pointer first char next line
2307: {
2308: p = end_line (p);
2309: if (*p == '\n' && p < end - 1)
2310: p++; // step to next line
2311: return (p);
2312: }
2313:
2314: //----- Text Information Routines ------------------------------
2315: static Byte *end_screen(void)
2316: {
2317: Byte *q;
2318: int cnt;
2319:
2320: // find new bottom line
2321: q = screenbegin;
2322: for (cnt = 0; cnt < rows - 2; cnt++)
2323: q = next_line (q);
2324: q = end_line (q);
2325: return (q);
2326: }
2327:
2328: static int count_lines(Byte * start, Byte * stop) // count line from start to stop
2329: {
2330: Byte *q;
2331: int cnt;
2332:
2333: if (stop < start) { // start and stop are backwards- reverse them
2334: q = start;
2335: start = stop;
2336: stop = q;
2337: }
2338: cnt = 0;
2339: stop = end_line (stop); // get to end of this line
2340: for (q = start; q <= stop && q <= end - 1; q++) {
2341: if (*q == '\n')
2342: cnt++;
2343: }
2344: return (cnt);
2345: }
2346:
2347: static Byte *find_line(int li) // find begining of line #li
2348: {
2349: Byte *q;
2350:
2351: for (q = text; li > 1; li--) {
2352: q = next_line (q);
2353: }
2354: return (q);
2355: }
2356:
2357: //----- Dot Movement Routines ----------------------------------
2358: static void dot_left(void)
2359: {
2360: if (dot > text && dot[-1] != '\n')
2361: dot--;
2362: }
2363:
2364: static void dot_right(void)
2365: {
2366: if (dot < end - 1 && *dot != '\n')
2367: dot++;
2368: }
2369:
2370: static void dot_begin(void)
2371: {
2372: dot = begin_line (dot); // return pointer to first char cur line
2373: }
2374:
2375: static void dot_end(void)
2376: {
2377: dot = end_line (dot); // return pointer to last char cur line
2378: }
2379:
2380: static Byte *move_to_col(Byte * p, int l)
2381: {
2382: int co;
2383:
2384: p = begin_line (p);
2385: co = 0;
2386: do {
2387: if (*p == '\n' || *p == '\0')
2388: break;
2389: if (*p == '\t') {
2390: // 7 - (co % 8 )
2391: co += ((tabstop - 1) - (co % tabstop));
2392: } else if (*p < ' ') {
2393: co++; // display as ^X, use 2 columns
2394: }
2395: } while (++co <= l && p++ < end);
2396: return (p);
2397: }
2398:
2399: static void dot_next(void)
2400: {
2401: dot = next_line (dot);
2402: }
2403:
2404: static void dot_prev(void)
2405: {
2406: dot = prev_line (dot);
2407: }
2408:
2409: static void dot_scroll(int cnt, int dir)
2410: {
2411: Byte *q;
2412:
2413: for (; cnt > 0; cnt--) {
2414: if (dir < 0) {
2415: // scroll Backwards
2416: // ctrl-Y scroll up one line
2417: screenbegin = prev_line (screenbegin);
2418: } else {
2419: // scroll Forwards
2420: // ctrl-E scroll down one line
2421: screenbegin = next_line (screenbegin);
2422: }
2423: }
2424: // make sure "dot" stays on the screen so we dont scroll off
2425: if (dot < screenbegin)
2426: dot = screenbegin;
2427: q = end_screen (); // find new bottom line
2428: if (dot > q)
2429: dot = begin_line (q); // is dot is below bottom line?
2430: dot_skip_over_ws ();
2431: }
2432:
2433: static void dot_skip_over_ws(void)
2434: {
2435: // skip WS
2436: while (isspace (*dot) && *dot != '\n' && dot < end - 1)
2437: dot++;
2438: }
2439:
2440: static void dot_delete(void) // delete the char at 'dot'
2441: {
2442: (void) text_hole_delete (dot, dot);
2443: }
2444:
2445: static Byte *bound_dot(Byte * p) // make sure text[0] <= P < "end"
2446: {
2447: if (p >= end && end > text) {
2448: p = end - 1;
2449: indicate_error ('1');
2450: }
2451: if (p < text) {
2452: p = text;
2453: indicate_error ('2');
2454: }
2455: return (p);
2456: }
2457:
2458: //----- Helper Utility Routines --------------------------------
2459:
2460: //----------------------------------------------------------------
2461: //----- Char Routines --------------------------------------------
2462: /* Chars that are part of a word-
2463: * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
2464: * Chars that are Not part of a word (stoppers)
2465: * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
2466: * Chars that are WhiteSpace
2467: * TAB NEWLINE VT FF RETURN SPACE
2468: * DO NOT COUNT NEWLINE AS WHITESPACE
2469: */
2470:
2471: static Byte *new_screen(int ro, int co)
2472: {
2473: int li;
2474:
2475: if (screen != 0)
2476: free (screen);
2477: screensize = ro * co + 8;
2478: screen = (Byte *) malloc (screensize);
2479: // initialize the new screen. assume this will be a empty file.
2480: screen_erase ();
2481: // non-existant text[] lines start with a tilde (~).
2482: for (li = 1; li < ro - 1; li++) {
2483: screen[(li * co) + 0] = '~';
2484: }
2485: return (screen);
2486: }
2487:
2488: static Byte *new_text(int size)
2489: {
2490: if (size < 10240)
2491: size = 10240; // have a minimum size for new files
2492: if (text != 0) {
2493: //text -= 4;
2494: free (text);
2495: }
2496: text = (Byte *) malloc (size + 8);
2497: memset (text, '\0', size); // clear new text[]
2498: //text += 4; // leave some room for "oops"
2499: textend = text + size - 1;
2500: //textend -= 4; // leave some root for "oops"
2501: return (text);
2502: }
2503:
2504: #ifdef BB_FEATURE_VI_SEARCH
2505: static int mycmp(Byte * s1, Byte * s2, int len)
2506: {
2507: int i;
2508:
2509: i = strncmp ((char *) s1, (char *) s2, len);
2510: #ifdef BB_FEATURE_VI_SETOPTS
2511: if (ignorecase) {
2512: i = strncasecmp ((char *) s1, (char *) s2, len);
2513: }
2514: #endif /* BB_FEATURE_VI_SETOPTS */
2515: return (i);
2516: }
2517:
2518: static Byte *char_search(Byte * p, Byte * pat, int dir, int range) // search for pattern starting at p
2519: {
2520: #ifndef REGEX_SEARCH
2521: Byte *start, *stop;
2522: int len;
2523:
2524: len = strlen ((char *) pat);
2525: if (dir == FORWARD) {
2526: stop = end - 1; // assume range is p - end-1
2527: if (range == LIMITED)
2528: stop = next_line (p); // range is to next line
2529: for (start = p; start < stop; start++) {
2530: if (mycmp (start, pat, len) == 0) {
2531: return (start);
2532: }
2533: }
2534: } else if (dir == BACK) {
2535: stop = text; // assume range is text - p
2536: if (range == LIMITED)
2537: stop = prev_line (p); // range is to prev line
2538: for (start = p - len; start >= stop; start--) {
2539: if (mycmp (start, pat, len) == 0) {
2540: return (start);
2541: }
2542: }
2543: }
2544: // pattern not found
2545: return (NULL);
2546: #else /*REGEX_SEARCH */
2547: char *q;
2548: struct re_pattern_buffer preg;
2549: int i;
2550: int size, range;
2551:
2552: re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
2553: preg.translate = 0;
2554: preg.fastmap = 0;
2555: preg.buffer = 0;
2556: preg.allocated = 0;
2557:
2558: // assume a LIMITED forward search
2559: q = next_line (p);
2560: q = end_line (q);
2561: q = end - 1;
2562: if (dir == BACK) {
2563: q = prev_line (p);
2564: q = text;
2565: }
2566: // count the number of chars to search over, forward or backward
2567: size = q - p;
2568: if (size < 0)
2569: size = p - q;
2570: // RANGE could be negative if we are searching backwards
2571: range = q - p;
2572:
2573: q = (char *) re_compile_pattern (pat, strlen ((char *) pat), &preg);
2574: if (q != 0) {
2575: // The pattern was not compiled
2576: psbs ("bad search pattern: \"%s\": %s", pat, q);
2577: i = 0; // return p if pattern not compiled
2578: goto cs1;
2579: }
2580:
2581: q = p;
2582: if (range < 0) {
2583: q = p - size;
2584: if (q < text)
2585: q = text;
2586: }
2587: // search for the compiled pattern, preg, in p[]
2588: // range < 0- search backward
2589: // range > 0- search forward
2590: // 0 < start < size
2591: // re_search() < 0 not found or error
2592: // re_search() > 0 index of found pattern
2593: // struct pattern char int int int struct reg
2594: // re_search (*pattern_buffer, *string, size, start, range, *regs)
2595: i = re_search (&preg, q, size, 0, range, 0);
2596: if (i == -1) {
2597: p = 0;
2598: i = 0; // return NULL if pattern not found
2599: }
2600: cs1:
2601: if (dir == FORWARD) {
2602: p = p + i;
2603: } else {
2604: p = p - i;
2605: }
2606: return (p);
2607: #endif /*REGEX_SEARCH */
2608: }
2609: #endif /* BB_FEATURE_VI_SEARCH */
2610:
2611: static Byte *char_insert(Byte * p, Byte c) // insert the char c at 'p'
2612: {
2613: if (c == 22) { // Is this an ctrl-V?
2614: p = stupid_insert (p, '^'); // use ^ to indicate literal next
2615: p--; // backup onto ^
2616: refresh (FALSE); // show the ^
2617: c = get_one_char ();
2618: *p = c;
2619: p++;
2620: file_modified = TRUE; // has the file been modified
2621: } else if (c == 27) { // Is this an ESC?
2622: cmd_mode = 0;
2623: cmdcnt = 0;
2624: end_cmd_q (); // stop adding to q
2625: strcpy ((char *) status_buffer, " "); // clear the status buffer
2626: if ((p[-1] != '\n') && (dot > text)) {
2627: p--;
2628: }
2629: } else if (c == erase_char) { // Is this a BS
2630: // 123456789
2631: if ((p[-1] != '\n') && (dot > text)) {
2632: p--;
2633: p = text_hole_delete (p, p); // shrink buffer 1 char
2634: #ifdef BB_FEATURE_VI_DOT_CMD
2635: // also rmove char from last_modifying_cmd
2636: if (last_modifying_cmd && (strlen((char *) last_modifying_cmd) > 0)) {
2637: Byte *q;
2638:
2639: q = last_modifying_cmd;
2640: q[strlen ((char *) q) - 1] = '\0'; // erase BS
2641: q[strlen ((char *) q) - 1] = '\0'; // erase prev char
2642: }
2643: #endif /* BB_FEATURE_VI_DOT_CMD */
2644: }
2645: } else {
2646: // insert a char into text[]
2647: Byte *sp; // "save p"
2648:
2649: if (c == 13)
2650: c = '\n'; // translate \r to \n
2651: sp = p; // remember addr of insert
2652: p = stupid_insert (p, c); // insert the char
2653: #ifdef BB_FEATURE_VI_SETOPTS
2654: if (showmatch && strchr (")]}", *sp) != NULL) {
2655: showmatching (sp);
2656: }
2657: if (autoindent && c == '\n') { // auto indent the new line
2658: Byte *q;
2659:
2660: q = prev_line (p); // use prev line as templet
2661: for (; isblnk (*q); q++) {
2662: p = stupid_insert (p, *q); // insert the char
2663: }
2664: }
2665: #endif /* BB_FEATURE_VI_SETOPTS */
2666: }
2667: return (p);
2668: }
2669:
2670: static Byte *stupid_insert(Byte * p, Byte c) // stupidly insert the char c at 'p'
2671: {
2672: p = text_hole_make (p, 1);
2673: if (p != 0) {
2674: *p = c;
2675: file_modified = TRUE; // has the file been modified
2676: p++;
2677: }
2678: return (p);
2679: }
2680:
2681: static Byte find_range(Byte ** start, Byte ** stop, Byte c)
2682: {
2683: Byte *save_dot, *p, *q;
2684: int cnt;
2685:
2686: save_dot = dot;
2687: p = q = dot;
2688:
2689: if (strchr ("cdy><", c)) {
2690: // these cmds operate on whole lines
2691: p = q = begin_line (p);
2692: for (cnt = 1; cnt < cmdcnt; cnt++) {
2693: q = next_line (q);
2694: }
2695: q = end_line (q);
2696: } else if (strchr ("^%$0bBeEft", c)) {
2697: // These cmds operate on char positions
2698: do_cmd (c); // execute movement cmd
2699: q = dot;
2700: } else if (strchr ("wW", c)) {
2701: do_cmd (c); // execute movement cmd
2702: if (dot > text)
2703: dot--; // move back off of next word
2704: if (dot > text && *dot == '\n')
2705: dot--; // stay off NL
2706: q = dot;
2707: } else if (strchr ("H-k{", c)) {
2708: // these operate on multi-lines backwards
2709: q = end_line (dot); // find NL
2710: do_cmd (c); // execute movement cmd
2711: dot_begin ();
2712: p = dot;
2713: } else if (strchr ("L+j}\r\n", c)) {
2714: // these operate on multi-lines forwards
2715: p = begin_line (dot);
2716: do_cmd (c); // execute movement cmd
2717: dot_end (); // find NL
2718: q = dot;
2719: } else {
2720: c = 27; // error- return an ESC char
2721: //break;
2722: }
2723: *start = p;
2724: *stop = q;
2725: if (q < p) {
2726: *start = q;
2727: *stop = p;
2728: }
2729: dot = save_dot;
2730: return (c);
2731: }
2732:
2733: static int st_test(Byte * p, int type, int dir, Byte * tested)
2734: {
2735: Byte c, c0, ci;
2736: int test, inc;
2737:
2738: inc = dir;
2739: c = c0 = p[0];
2740: ci = p[inc];
2741: test = 0;
2742:
2743: if (type == S_BEFORE_WS) {
2744: c = ci;
2745: test = ((!isspace (c)) || c == '\n');
2746: }
2747: if (type == S_TO_WS) {
2748: c = c0;
2749: test = ((!isspace (c)) || c == '\n');
2750: }
2751: if (type == S_OVER_WS) {
2752: c = c0;
2753: test = ((isspace (c)));
2754: }
2755: if (type == S_END_PUNCT) {
2756: c = ci;
2757: test = ((ispunct (c)));
2758: }
2759: if (type == S_END_ALNUM) {
2760: c = ci;
2761: test = ((isalnum (c)) || c == '_');
2762: }
2763: *tested = c;
2764: return (test);
2765: }
2766:
2767: static Byte *skip_thing(Byte * p, int linecnt, int dir, int type)
2768: {
2769: Byte c;
2770:
2771: while (st_test(p, type, dir, &c)) {
2772: // make sure we limit search to correct number of lines
2773: if (c == '\n' && --linecnt < 1)
2774: break;
2775: if (dir >= 0 && p >= end - 1)
2776: break;
2777: if (dir < 0 && p <= text)
2778: break;
2779: p += dir; // move to next char
2780: }
2781: return (p);
2782: }
2783:
2784: // find matching char of pair () [] {}
2785: static Byte *find_pair(Byte * p, Byte c)
2786: {
2787: Byte match, *q;
2788: int dir, level;
2789:
2790: match = ')';
2791: level = 1;
2792: dir = 1; // assume forward
2793: switch (c) {
2794: case '(':
2795: match = ')';
2796: break;
2797: case '[':
2798: match = ']';
2799: break;
2800: case '{':
2801: match = '}';
2802: break;
2803: case ')':
2804: match = '(';
2805: dir = -1;
2806: break;
2807: case ']':
2808: match = '[';
2809: dir = -1;
2810: break;
2811: case '}':
2812: match = '{';
2813: dir = -1;
2814: break;
2815: }
2816: for (q = p + dir; text <= q && q < end; q += dir) {
2817: // look for match, count levels of pairs (( ))
2818: if (*q == c)
2819: level++; // increase pair levels
2820: if (*q == match)
2821: level--; // reduce pair level
2822: if (level == 0)
2823: break; // found matching pair
2824: }
2825: if (level != 0)
2826: q = NULL; // indicate no match
2827: return (q);
2828: }
2829:
2830: #ifdef BB_FEATURE_VI_SETOPTS
2831: // show the matching char of a pair, () [] {}
2832: static void showmatching(Byte * p)
2833: {
2834: Byte *q, *save_dot;
2835:
2836: // we found half of a pair
2837: q = find_pair (p, *p); // get loc of matching char
2838: if (q == NULL) {
2839: indicate_error ('3'); // no matching char
2840: } else {
2841: // "q" now points to matching pair
2842: save_dot = dot; // remember where we are
2843: dot = q; // go to new loc
2844: refresh (FALSE); // let the user see it
2845: (void) mysleep (40); // give user some time
2846: dot = save_dot; // go back to old loc
2847: refresh (FALSE);
2848: }
2849: }
2850: #endif /* BB_FEATURE_VI_SETOPTS */
2851:
2852: // open a hole in text[]
2853: static Byte *text_hole_make(Byte * p, int size) // at "p", make a 'size' byte hole
2854: {
2855: Byte *src, *dest;
2856: int cnt;
2857:
2858: if (size <= 0)
2859: goto thm0;
2860: src = p;
2861: dest = p + size;
2862: cnt = end - src; // the rest of buffer
2863: if (memmove(dest, src, cnt) != dest) {
2864: psbs ("can't create room for new characters");
2865: }
2866: memset (p, ' ', size); // clear new hole
2867: end = end + size; // adjust the new END
2868: file_modified = TRUE; // has the file been modified
2869: thm0:
2870: return (p);
2871: }
2872:
2873: // close a hole in text[]
2874: static Byte *text_hole_delete(Byte * p, Byte * q) // delete "p" thru "q", inclusive
2875: {
2876: Byte *src, *dest;
2877: int cnt, hole_size;
2878:
2879: // move forwards, from beginning
2880: // assume p <= q
2881: src = q + 1;
2882: dest = p;
2883: if (q < p) { // they are backward- swap them
2884: src = p + 1;
2885: dest = q;
2886: }
2887: hole_size = q - p + 1;
2888: cnt = end - src;
2889: if (src < text || src > end)
2890: goto thd0;
2891: if (dest < text || dest >= end)
2892: goto thd0;
2893: if (src >= end)
2894: goto thd_atend; // just delete the end of the buffer
2895: if (memmove(dest, src, cnt) != dest) {
2896: psbs ("can't delete the character");
2897: }
2898: thd_atend:
2899: end = end - hole_size; // adjust the new END
2900: if (dest >= end)
2901: dest = end - 1; // make sure dest in below end-1
2902: if (end <= text)
2903: dest = end = text; // keep pointers valid
2904: file_modified = TRUE; // has the file been modified
2905: thd0:
2906: return (dest);
2907: }
2908:
2909: // copy text into register, then delete text.
2910: // if dist <= 0, do not include, or go past, a NewLine
2911: //
2912: static Byte *yank_delete(Byte * start, Byte * stop, int dist, int yf)
2913: {
2914: Byte *p;
2915:
2916: // make sure start <= stop
2917: if (start > stop) {
2918: // they are backwards, reverse them
2919: p = start;
2920: start = stop;
2921: stop = p;
2922: }
2923: if (dist <= 0) {
2924: // we can not cross NL boundaries
2925: p = start;
2926: if (*p == '\n')
2927: return (p);
2928: // dont go past a NewLine
2929: for (; p + 1 <= stop; p++) {
2930: if (p[1] == '\n') {
2931: stop = p; // "stop" just before NewLine
2932: break;
2933: }
2934: }
2935: }
2936: p = start;
2937: #ifdef BB_FEATURE_VI_YANKMARK
2938: text_yank (start, stop, YDreg);
2939: #endif /* BB_FEATURE_VI_YANKMARK */
2940: if (yf == YANKDEL) {
2941: p = text_hole_delete (start, stop);
2942: } // delete lines
2943: return (p);
2944: }
2945:
2946: static void show_help(void)
2947: {
2948: fprintf (stderr, "version: %s\n", vi_Version);
2949: puts ("These features are available:"
2950: #ifdef BB_FEATURE_VI_SEARCH
2951: "\n\tPattern searches with / and ?"
2952: #endif /* BB_FEATURE_VI_SEARCH */
2953: #ifdef BB_FEATURE_VI_DOT_CMD
2954: "\n\tLast command repeat with \'.\'"
2955: #endif /* BB_FEATURE_VI_DOT_CMD */
2956: #ifdef BB_FEATURE_VI_YANKMARK
2957: "\n\tLine marking with 'x"
2958: "\n\tNamed buffers with \"x"
2959: #endif /* BB_FEATURE_VI_YANKMARK */
2960: #ifdef BB_FEATURE_VI_READONLY
2961: "\n\tReadonly if vi is called as \"view\""
2962: "\n\tReadonly with -R command line arg"
2963: #endif /* BB_FEATURE_VI_READONLY */
2964: #ifdef BB_FEATURE_VI_SET
2965: "\n\tSome colon mode commands with \':\'"
2966: #endif /* BB_FEATURE_VI_SET */
2967: #ifdef BB_FEATURE_VI_SETOPTS
2968: "\n\tSettable options with \":set\""
2969: #endif /* BB_FEATURE_VI_SETOPTS */
2970: #ifdef BB_FEATURE_VI_USE_SIGNALS
2971: "\n\tSignal catching- ^C"
2972: "\n\tJob suspend and resume with ^Z"
2973: #endif /* BB_FEATURE_VI_USE_SIGNALS */
2974: #ifdef BB_FEATURE_VI_WIN_RESIZE
2975: "\n\tAdapt to window re-sizes"
2976: #endif /* BB_FEATURE_VI_WIN_RESIZE */
2977: );
2978: }
2979:
2980: static void print_literal(Byte * buf, Byte * s) // copy s to buf, convert unprintable
2981: {
2982: Byte c, b[2];
2983:
2984: b[1] = '\0';
2985: strcpy ((char *) buf, ""); // init buf
2986: if (strlen ((char *) s) <= 0)
2987: s = (Byte *) "(NULL)";
2988: for (; *s > '\0'; s++) {
2989: c = *s;
2990: if (*s > '~') {
2991: strlcat((char *) buf, SOs, BUFSIZ); /* FIXED strlcat BUFSIZ */
2992: c = *s - 128;
2993: }
2994: if (*s < ' ') {
2995: strcat ((char *) buf, "^");
2996: c += '@';
2997: }
2998: b[0] = c;
2999: strlcat((char *) buf, (char *) b, BUFSIZ); /* FIXED added BUFSIZ and converted to strlcat() */
3000: if (*s > '~')
3001: strlcat((char *) buf, SOn, BUFSIZ); /* FIXED strlcat BUFSIZ */
3002: if (*s == '\n') {
3003: strcat ((char *) buf, "$");
3004: }
3005: }
3006: }
3007:
3008: #ifdef BB_FEATURE_VI_DOT_CMD
3009: static void start_new_cmd_q(Byte c)
3010: {
3011: // release old cmd
3012: if (last_modifying_cmd != 0)
3013: free (last_modifying_cmd);
3014: // get buffer for new cmd
3015: last_modifying_cmd = (Byte *) malloc (BUFSIZ);
3016: memset (last_modifying_cmd, '\0', BUFSIZ); // clear new cmd queue
3017: // if there is a current cmd count put it in the buffer first
3018: if (cmdcnt > 0)
3019: sprintf ((char *) last_modifying_cmd, "%d", cmdcnt);
3020: // save char c onto queue
3021: last_modifying_cmd[strlen ((char *) last_modifying_cmd)] = c;
3022: adding2q = 1;
3023: return;
3024: }
3025:
3026: static void end_cmd_q()
3027: {
3028: #ifdef BB_FEATURE_VI_YANKMARK
3029: YDreg = 26; // go back to default Yank/Delete reg
3030: #endif /* BB_FEATURE_VI_YANKMARK */
3031: adding2q = 0;
3032: return;
3033: }
3034: #endif /* BB_FEATURE_VI_DOT_CMD */
3035:
3036: #if defined(BB_FEATURE_VI_YANKMARK) || defined(BB_FEATURE_VI_COLON) || defined(BB_FEATURE_VI_CRASHME)
3037: static Byte * string_insert(Byte * p, Byte * s) // insert the string at 'p'
3038: {
3039: int cnt, i;
3040:
3041: i = strlen ((char *) s);
3042: p = text_hole_make (p, i);
3043: strncpy ((char *) p, (char *) s, i);
3044: for (cnt = 0; *s != '\0'; s++) {
3045: if (*s == '\n')
3046: cnt++;
3047: }
3048: #ifdef BB_FEATURE_VI_YANKMARK
3049: psb ("Put %d lines (%d chars) from [%c]", cnt, i, what_reg ());
3050: #endif /* BB_FEATURE_VI_YANKMARK */
3051: return (p);
3052: }
3053: #endif /* BB_FEATURE_VI_YANKMARK || BB_FEATURE_VI_COLON || BB_FEATURE_VI_CRASHME */
3054:
3055: #ifdef BB_FEATURE_VI_YANKMARK
3056: static Byte *text_yank(Byte * p, Byte * q, int dest) // copy text into a register
3057: {
3058: Byte *t;
3059: int cnt;
3060:
3061: if (q < p) { // they are backwards- reverse them
3062: t = q;
3063: q = p;
3064: p = t;
3065: }
3066: cnt = q - p + 1;
3067: t = reg[dest];
3068: if (t != 0) { // if already a yank register
3069: free (t); // free it
3070: }
3071: t = (Byte *) malloc (cnt + 1); // get a new register
3072: memset (t, '\0', cnt + 1); // clear new text[]
3073: strncpy ((char *) t, (char *) p, cnt); // copy text[] into bufer
3074: reg[dest] = t;
3075: return (p);
3076: }
3077:
3078: static Byte what_reg(void)
3079: {
3080: Byte c;
3081: int i;
3082:
3083: i = 0;
3084: c = 'D'; // default to D-reg
3085: if (0 <= YDreg && YDreg <= 25)
3086: c = 'a' + (Byte) YDreg;
3087: if (YDreg == 26)
3088: c = 'D';
3089: if (YDreg == 27)
3090: c = 'U';
3091: return (c);
3092: }
3093:
3094: static void check_context(Byte cmd)
3095: {
3096: // A context is defined to be "modifying text"
3097: // Any modifying command establishes a new context.
3098:
3099: if (dot < context_start || dot > context_end) {
3100: if (strchr((char *) modifying_cmds, cmd) != NULL) {
3101: // we are trying to modify text[]- make this the current context
3102: mark[27] = mark[26]; // move cur to prev
3103: mark[26] = dot; // move local to cur
3104: context_start = prev_line (prev_line (dot));
3105: context_end = next_line (next_line (dot));
3106: //loiter= start_loiter= now;
3107: }
3108: }
3109: return;
3110: }
3111:
3112: static Byte *swap_context(Byte * p) // goto new context for '' command make this the current context
3113: {
3114: Byte *tmp;
3115:
3116: // the current context is in mark[26]
3117: // the previous context is in mark[27]
3118: // only swap context if other context is valid
3119: if (text <= mark[27] && mark[27] <= end - 1) {
3120: tmp = mark[27];
3121: mark[27] = mark[26];
3122: mark[26] = tmp;
3123: p = mark[26]; // where we are going- previous context
3124: context_start = prev_line (prev_line (prev_line (p)));
3125: context_end = next_line (next_line (next_line (p)));
3126: }
3127: return (p);
3128: }
3129: #endif /* BB_FEATURE_VI_YANKMARK */
3130:
3131: static int isblnk(Byte c) // is the char a blank or tab
3132: {
3133: return (c == ' ' || c == '\t');
3134: }
3135:
3136: //----- Set terminal attributes --------------------------------
3137: static void rawmode(void)
3138: {
3139: tcgetattr (0, &term_orig);
3140: term_vi = term_orig;
3141: term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
3142: term_vi.c_iflag &= (~IXON & ~ICRNL);
3143: term_vi.c_oflag &= (~ONLCR);
3144: #ifndef linux
3145: term_vi.c_cc[VMIN] = 1;
3146: term_vi.c_cc[VTIME] = 0;
3147: #endif
3148: erase_char = term_vi.c_cc[VERASE];
3149: tcsetattr (0, TCSANOW, &term_vi);
3150: }
3151:
3152: static void cookmode(void)
3153: {
3154: tcsetattr (0, TCSANOW, &term_orig);
3155: }
3156:
3157: #ifdef BB_FEATURE_VI_WIN_RESIZE
3158: //----- See what the window size currently is --------------------
3159: static void window_size_get(int sig)
3160: {
3161: int i;
3162:
3163: i = ioctl (0, TIOCGWINSZ, &winsize);
3164: if (i != 0) {
3165: // force 24x80
3166: winsize.ws_row = 24;
3167: winsize.ws_col = 80;
3168: }
3169: if (winsize.ws_row <= 1) {
3170: winsize.ws_row = 24;
3171: }
3172: if (winsize.ws_col <= 1) {
3173: winsize.ws_col = 80;
3174: }
3175: rows = (int) winsize.ws_row;
3176: columns = (int) winsize.ws_col;
3177: }
3178: #endif /* BB_FEATURE_VI_WIN_RESIZE */
3179:
3180: //----- Come here when we get a window resize signal ---------
3181: #ifdef BB_FEATURE_VI_USE_SIGNALS
3182: static void winch_sig(int sig)
3183: {
3184: signal (SIGWINCH, winch_sig);
3185: #ifdef BB_FEATURE_VI_WIN_RESIZE
3186: window_size_get (0);
3187: #endif /* BB_FEATURE_VI_WIN_RESIZE */
3188: new_screen (rows, columns); // get memory for virtual screen
3189: redraw (TRUE); // re-draw the screen
3190: }
3191:
3192: //----- Come here when we get a continue signal -------------------
3193: static void cont_sig(int sig)
3194: {
3195: rawmode (); // terminal to "raw"
3196: *status_buffer = '\0'; // clear the status buffer
3197: redraw (TRUE); // re-draw the screen
3198:
3199: signal (SIGTSTP, suspend_sig);
3200: signal (SIGCONT, SIG_DFL);
3201: kill (getpid (), SIGCONT);
3202: }
3203:
3204: //----- Come here when we get a Suspend signal -------------------
3205: static void suspend_sig(int sig)
3206: {
3207: place_cursor (rows - 1, 0, FALSE); // go to bottom of screen
3208: clear_to_eol (); // Erase to end of line
3209: cookmode (); // terminal to "cooked"
3210:
3211: signal (SIGCONT, cont_sig);
3212: signal (SIGTSTP, SIG_DFL);
3213: kill (getpid (), SIGTSTP);
3214: }
3215:
3216: //----- Come here when we get a signal ---------------------------
3217: static void catch_sig(int sig)
3218: {
3219: signal (SIGHUP, catch_sig);
3220: signal (SIGINT, catch_sig);
3221: signal (SIGTERM, catch_sig);
3222: longjmp (restart, sig);
3223: }
3224:
3225: static void alarm_sig(int sig)
3226: {
3227: signal (SIGALRM, catch_sig);
3228: longjmp (restart, sig);
3229: }
3230:
3231: //----- Come here when we get a core dump signal -----------------
3232: static void core_sig(int sig)
3233: {
3234: signal (SIGQUIT, core_sig);
3235: signal (SIGILL, core_sig);
3236: signal (SIGTRAP, core_sig);
3237: signal (SIGIOT, core_sig);
3238: signal (SIGABRT, core_sig);
3239: signal (SIGFPE, core_sig);
3240: signal (SIGBUS, core_sig);
3241: signal (SIGSEGV, core_sig);
3242: #ifdef SIGSYS
3243: signal (SIGSYS, core_sig);
3244: #endif
3245:
3246: dot = bound_dot (dot); // make sure "dot" is valid
3247:
3248: longjmp (restart, sig);
3249: }
3250: #endif /* BB_FEATURE_VI_USE_SIGNALS */
3251:
3252: static int mysleep(int hund) // sleep for 'h' 1/100 seconds
3253: {
3254: // Don't hang- Wait 5/100 seconds- 1 Sec= 1000000
3255: FD_ZERO (&rfds);
3256: FD_SET (0, &rfds);
3257: tv.tv_sec = 0;
3258: tv.tv_usec = hund * 10000;
3259: select (1, &rfds, NULL, NULL, &tv);
3260: return (FD_ISSET (0, &rfds));
3261: }
3262:
3263: //----- IO Routines --------------------------------------------
3264: static Byte readit(void) // read (maybe cursor) key from stdin
3265: {
3266: Byte c;
3267: int i, bufsiz, cnt, cmdindex;
3268: struct esc_cmds {
3269: Byte *seq;
3270: Byte val;
3271: };
3272:
3273: static struct esc_cmds esccmds[] = {
3274: {(Byte *) "OA", (Byte) VI_K_UP}, // cursor key Up
3275: {(Byte *) "OB", (Byte) VI_K_DOWN}, // cursor key Down
3276: {(Byte *) "OC", (Byte) VI_K_RIGHT}, // Cursor Key Right
3277: {(Byte *) "OD", (Byte) VI_K_LEFT}, // cursor key Left
3278: {(Byte *) "OH", (Byte) VI_K_HOME}, // Cursor Key Home
3279: {(Byte *) "OF", (Byte) VI_K_END}, // Cursor Key End
3280: {(Byte *) "[A", (Byte) VI_K_UP}, // cursor key Up
3281: {(Byte *) "[B", (Byte) VI_K_DOWN}, // cursor key Down
3282: {(Byte *) "[C", (Byte) VI_K_RIGHT}, // Cursor Key Right
3283: {(Byte *) "[D", (Byte) VI_K_LEFT}, // cursor key Left
3284: {(Byte *) "[H", (Byte) VI_K_HOME}, // Cursor Key Home
3285: {(Byte *) "[F", (Byte) VI_K_END}, // Cursor Key End
3286: {(Byte *) "[2~", (Byte) VI_K_INSERT}, // Cursor Key Insert
3287: {(Byte *) "[5~", (Byte) VI_K_PAGEUP}, // Cursor Key Page Up
3288: {(Byte *) "[6~", (Byte) VI_K_PAGEDOWN}, // Cursor Key Page Down
3289: {(Byte *) "OP", (Byte) VI_K_FUN1}, // Function Key F1
3290: {(Byte *) "OQ", (Byte) VI_K_FUN2}, // Function Key F2
3291: {(Byte *) "OR", (Byte) VI_K_FUN3}, // Function Key F3
3292: {(Byte *) "OS", (Byte) VI_K_FUN4}, // Function Key F4
3293: {(Byte *) "[15~", (Byte) VI_K_FUN5}, // Function Key F5
3294: {(Byte *) "[17~", (Byte) VI_K_FUN6}, // Function Key F6
3295: {(Byte *) "[18~", (Byte) VI_K_FUN7}, // Function Key F7
3296: {(Byte *) "[19~", (Byte) VI_K_FUN8}, // Function Key F8
3297: {(Byte *) "[20~", (Byte) VI_K_FUN9}, // Function Key F9
3298: {(Byte *) "[21~", (Byte) VI_K_FUN10}, // Function Key F10
3299: {(Byte *) "[23~", (Byte) VI_K_FUN11}, // Function Key F11
3300: {(Byte *) "[24~", (Byte) VI_K_FUN12}, // Function Key F12
3301: {(Byte *) "[11~", (Byte) VI_K_FUN1}, // Function Key F1
3302: {(Byte *) "[12~", (Byte) VI_K_FUN2}, // Function Key F2
3303: {(Byte *) "[13~", (Byte) VI_K_FUN3}, // Function Key F3
3304: {(Byte *) "[14~", (Byte) VI_K_FUN4}, // Function Key F4
3305: };
3306:
3307: #define ESCCMDS_COUNT (sizeof(esccmds)/sizeof(struct esc_cmds))
3308:
3309: // (void) alarm(0); // turn alarm OFF while we wait for input
3310: // get input from User- are there already input chars in Q?
3311: bufsiz = strlen ((char *) readbuffer);
3312: if (bufsiz <= 0) {
3313: ri0:
3314: // the Q is empty, wait for a typed char
3315: bufsiz = read (0, readbuffer, BUFSIZ - 1);
3316: if (bufsiz < 0) {
3317: if (errno == EINTR)
3318: goto ri0; // interrupted sys call
3319: if (errno == EBADF)
3320: editing = 0;
3321: if (errno == EFAULT)
3322: editing = 0;
3323: if (errno == EINVAL)
3324: editing = 0;
3325: if (errno == EIO)
3326: editing = 0;
3327: errno = 0;
3328: bufsiz = 0;
3329: }
3330: readbuffer[bufsiz] = '\0';
3331: }
3332: // return char if it is not part of ESC sequence
3333: if (readbuffer[0] != 27)
3334: goto ri1;
3335:
3336: // This is an ESC char. Is this Esc sequence?
3337: // Could be bare Esc key. See if there are any
3338: // more chars to read after the ESC. This would
3339: // be a Function or Cursor Key sequence.
3340: FD_ZERO (&rfds);
3341: FD_SET (0, &rfds);
3342: tv.tv_sec = 0;
3343: tv.tv_usec = 50000; // Wait 5/100 seconds- 1 Sec=1000000
3344:
3345: // keep reading while there are input chars and room in buffer
3346: while (select(1, &rfds, NULL, NULL, &tv) > 0 && bufsiz <= (BUFSIZ - 5)) {
3347: // read the rest of the ESC string
3348: i = read (0, (void *) (readbuffer + bufsiz), BUFSIZ - bufsiz);
3349: if (i > 0) {
3350: bufsiz += i;
3351: readbuffer[bufsiz] = '\0'; // Terminate the string
3352: }
3353: }
3354: // Maybe cursor or function key?
3355: for (cmdindex = 0; cmdindex < ESCCMDS_COUNT; cmdindex++) {
3356: cnt = strlen ((char *) esccmds[cmdindex].seq);
3357: i = strncmp ((char *) esccmds[cmdindex].seq, (char *) readbuffer, cnt);
3358: if (i == 0) {
3359: // is a Cursor key- put derived value back into Q
3360: readbuffer[0] = esccmds[cmdindex].val;
3361: // squeeze out the ESC sequence
3362: for (i = 1; i < cnt; i++) {
3363: memmove (readbuffer + 1, readbuffer + 2, BUFSIZ - 2);
3364: readbuffer[BUFSIZ - 1] = '\0';
3365: }
3366: break;
3367: }
3368: }
3369: ri1:
3370: c = readbuffer[0];
3371: // remove one char from Q
3372: memmove (readbuffer, readbuffer + 1, BUFSIZ - 1);
3373: readbuffer[BUFSIZ - 1] = '\0';
3374: // (void) alarm(3); // we are done waiting for input, turn alarm ON
3375: return (c);
3376: }
3377:
3378: //----- IO Routines --------------------------------------------
3379: static Byte get_one_char()
3380: {
3381: static Byte c;
3382:
3383: #ifdef BB_FEATURE_VI_DOT_CMD
3384: // ! adding2q && ioq == 0 read()
3385: // ! adding2q && ioq != 0 *ioq
3386: // adding2q *last_modifying_cmd= read()
3387: if (!adding2q) {
3388: // we are not adding to the q.
3389: // but, we may be reading from a q
3390: if (ioq == 0) {
3391: // there is no current q, read from STDIN
3392: c = readit (); // get the users input
3393: } else {
3394: // there is a queue to get chars from first
3395: c = *ioq++;
3396: if (c == '\0') {
3397: // the end of the q, read from STDIN
3398: free (ioq_start);
3399: ioq_start = ioq = 0;
3400: c = readit (); // get the users input
3401: }
3402: }
3403: } else {
3404: // adding STDIN chars to q
3405: c = readit (); // get the users input
3406: if (last_modifying_cmd != 0) {
3407: int len = strlen((char *) last_modifying_cmd);
3408: if (len + 1 >= BUFSIZ) {
3409: /* FIXME last_modifying_cmd needs a shaving */
3410: fprintf(stderr,"last_modifying_cmd overrun");
3411: exit(EXIT_FAILURE);
3412: } else {
3413: // add new char to q
3414: last_modifying_cmd[len] = c;
3415: }
3416:
3417: }
3418: }
3419: #else /* BB_FEATURE_VI_DOT_CMD */
3420: c = readit (); // get the users input
3421: #endif /* BB_FEATURE_VI_DOT_CMD */
3422: return (c); // return the char, where ever it came from
3423: }
3424:
3425: static Byte *get_input_line(Byte * prompt) // get input line- use "status line"
3426: {
3427: Byte buf[BUFSIZ];
3428: Byte c;
3429: int i;
3430: static Byte *obufp = NULL;
3431:
3432: /* FIXED strcpy((char *) buf, (char *) prompt); */
3433: if (strlcpy((char *) buf, (char *) prompt, sizeof((char *)buf)) > sizeof ((char *) buf)) err(1, "strlcpy overflow in function get_input_line");
3434: *status_buffer = '\0'; // clear the status buffer
3435: place_cursor (rows - 1, 0, FALSE); // go to Status line, bottom of screen
3436: clear_to_eol (); // clear the line
3437: write (1, prompt, strlen ((char *) prompt)); // write out the :, /, or ? prompt
3438:
3439: for (i = strlen ((char *) buf); i < BUFSIZ;) {
3440: c = get_one_char (); // read user input
3441: if (c == '\n' || c == '\r' || c == 27)
3442: break; // is this end of input
3443: if (c == erase_char) { // user wants to erase prev char
3444: i--; // backup to prev char
3445: buf[i] = '\0'; // erase the char
3446: buf[i + 1] = '\0'; // null terminate buffer
3447: write (1, " ", 3); // erase char on screen
3448: if (i <= 0) { // user backs up before b-o-l, exit
3449: break;
3450: }
3451: } else {
3452: buf[i] = c; // save char in buffer
3453: buf[i + 1] = '\0'; // make sure buffer is null terminated
3454: write (1, buf + i, 1); // echo the char back to user
3455: i++;
3456: }
3457: }
3458: refresh (FALSE);
3459: if (obufp != NULL)
3460: free (obufp);
3461: obufp = (Byte *) strdup ((char *) buf);
3462: return (obufp);
3463: }
3464:
3465: static int file_size(Byte * fn) // what is the byte size of "fn"
3466: {
3467: struct stat st_buf;
3468: int cnt, sr;
3469:
3470: if (fn == 0 || strlen (fn) <= 0)
3471: return (-1);
3472: cnt = -1;
3473: sr = stat ((char *) fn, &st_buf); // see if file exists
3474: if (sr >= 0) {
3475: cnt = (int) st_buf.st_size;
3476: }
3477: return (cnt);
3478: }
3479:
3480: static int file_insert(Byte * fn, Byte * p, int size)
3481: {
3482: int fd, cnt;
3483:
3484: cnt = -1;
3485: #ifdef BB_FEATURE_VI_READONLY
3486: readonly = FALSE;
3487: #endif /* BB_FEATURE_VI_READONLY */
3488: if (fn == 0 || strlen ((char *) fn) <= 0) {
3489: psbs ("No filename given");
3490: goto fi0;
3491: }
3492: if (size == 0) {
3493: // OK- this is just a no-op
3494: cnt = 0;
3495: goto fi0;
3496: }
3497: if (size < 0) {
3498: psbs ("Trying to insert a negative number (%d) of characters", size);
3499: goto fi0;
3500: }
3501: if (p < text || p > end) {
3502: psbs ("Trying to insert file outside of memory");
3503: goto fi0;
3504: }
3505:
3506: // see if we can open the file
3507: #ifdef BB_FEATURE_VI_READONLY
3508: if (vi_readonly == TRUE) goto fi1; // do not try write-mode
3509: #endif
3510: fd = open ((char *) fn, O_RDWR); // assume read & write
3511: if (fd < 0) {
3512: // could not open for writing- maybe file is read only
3513: #ifdef BB_FEATURE_VI_READONLY
3514: fi1:
3515: #endif
3516: fd = open ((char *) fn, O_RDONLY); // try read-only
3517: if (fd < 0) {
3518: psbs ("\"%s\" %s", fn, "could not open file");
3519: goto fi0;
3520: }
3521: #ifdef BB_FEATURE_VI_READONLY
3522: // got the file- read-only
3523: readonly = TRUE;
3524: #endif /* BB_FEATURE_VI_READONLY */
3525: }
3526: p = text_hole_make (p, size);
3527: cnt = read (fd, p, size);
3528: close (fd);
3529: if (cnt < 0) {
3530: cnt = -1;
3531: p = text_hole_delete (p, p + size - 1); // un-do buffer insert
3532: psbs ("could not read file \"%s\"", fn);
3533: } else if (cnt < size) {
3534: // There was a partial read, shrink unused space text[]
3535: p = text_hole_delete (p + cnt, p + (size - cnt) - 1); // un-do buffer insert
3536: psbs ("could not read all of file \"%s\"", fn);
3537: }
3538: if (cnt >= size)
3539: file_modified = TRUE;
3540: fi0:
3541: return (cnt);
3542: }
3543:
3544: static int file_write(Byte * fn, Byte * first, Byte * last)
3545: {
3546: int fd, cnt, charcnt;
3547:
3548: if (fn == 0) {
3549: psbs ("No current filename");
3550: return (-1);
3551: }
3552: charcnt = 0;
3553: // FIXIT- use the correct umask()
3554: fd = open ((char *) fn, (O_WRONLY | O_CREAT | O_TRUNC), 0664);
3555: if (fd < 0)
3556: return (-1);
3557: cnt = last - first + 1;
3558: charcnt = write (fd, first, cnt);
3559: if (charcnt == cnt) {
3560: // good write
3561: //file_modified= FALSE; // the file has not been modified
3562: } else {
3563: charcnt = 0;
3564: }
3565: close (fd);
3566: return (charcnt);
3567: }
3568:
3569: //----- Terminal Drawing ---------------------------------------
3570: // The terminal is made up of 'rows' line of 'columns' columns.
3571: // classicly this would be 24 x 80.
3572: // screen coordinates
3573: // 0,0 ... 0,79
3574: // 1,0 ... 1,79
3575: // . ... .
3576: // . ... .
3577: // 22,0 ... 22,79
3578: // 23,0 ... 23,79 status line
3579: //
3580:
3581: //----- Move the cursor to row x col (count from 0, not 1) -------
3582: static void place_cursor(int row, int col, int opti)
3583: {
3584: char cm1[BUFSIZ];
3585: char *cm;
3586: int l;
3587: #ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
3588: char cm2[BUFSIZ];
3589: Byte *screenp;
3590: // char cm3[BUFSIZ];
3591: int Rrow = last_row;
3592: #endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
3593:
3594: memset (cm1, '\0', BUFSIZ - 1); // clear the buffer
3595:
3596: if (row < 0) row = 0;
3597: if (row >= rows) row = rows - 1;
3598: if (col < 0) col = 0;
3599: if (col >= columns) col = columns - 1;
3600:
3601: //----- 1. Try the standard terminal ESC sequence
3602: sprintf ((char *) cm1, CMrc, row + 1, col + 1);
3603: cm = cm1;
3604: if (opti == FALSE) goto pc0;
3605:
3606: #ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
3607: //----- find the minimum # of chars to move cursor -------------
3608: //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
3609: memset (cm2, '\0', BUFSIZ - 1); // clear the buffer
3610: /* FIXME - possible replace with strlc* ? */
3611:
3612: // move to the correct row
3613: while (row < Rrow) {
3614: // the cursor has to move up
3615: strlcat(cm2, CMup, BUFSIZ); /* FIXED strlcat BUFSIZ */
3616: Rrow--;
3617: }
3618: while (row > Rrow) {
3619: // the cursor has to move down
3620: strlcat(cm2, CMdown, BUFSIZ); /* FIXED strlcat BUFSIZE */
3621: Rrow++;
3622: }
3623:
3624: // now move to the correct column
3625: strcat (cm2, "\r"); // start at col 0
3626: // just send out orignal source char to get to correct place
3627: screenp = &screen[row * columns]; // start of screen line
3628: strncat (cm2, screenp, col);
3629:
3630: //----- 3. Try some other way of moving cursor
3631: //---------------------------------------------
3632:
3633: // pick the shortest cursor motion to send out
3634: cm = cm1;
3635: if (strlen (cm2) < strlen (cm)) {
3636: cm = cm2;
3637: } /* else if (strlen(cm3) < strlen(cm)) {
3638: cm= cm3;
3639: } */
3640: #endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
3641: pc0:
3642: l = strlen (cm);
3643: if (l) write (1, cm, l); // move the cursor
3644: }
3645:
3646: //----- Erase from cursor to end of line -----------------------
3647: static void clear_to_eol()
3648: {
3649: write (1, Ceol, strlen (Ceol)); // Erase from cursor to end of line
3650: }
3651:
3652: //----- Erase from cursor to end of screen -----------------------
3653: static void clear_to_eos()
3654: {
3655: write (1, Ceos, strlen (Ceos)); // Erase from cursor to end of screen
3656: }
3657:
3658: //----- Start standout mode ------------------------------------
3659: static void standout_start() // send "start reverse video" sequence
3660: {
3661: write (1, SOs, strlen (SOs)); // Start reverse video mode
3662: }
3663:
3664: //----- End standout mode --------------------------------------
3665: static void standout_end() // send "end reverse video" sequence
3666: {
3667: write (1, SOn, strlen (SOn)); // End reverse video mode
3668: }
3669:
3670: //----- Flash the screen --------------------------------------
3671: static void flash(int h)
3672: {
3673: standout_start (); // send "start reverse video" sequence
3674: redraw (TRUE);
3675: (void) mysleep (h);
3676: standout_end (); // send "end reverse video" sequence
3677: redraw (TRUE);
3678: }
3679:
3680: static void beep()
3681: {
3682: write (1, bell, strlen (bell)); // send out a bell character
3683: }
3684:
3685: static void indicate_error(char c)
3686: {
3687: #ifdef BB_FEATURE_VI_CRASHME
3688: if (crashme > 0)
3689: return; // generate a random command
3690: #endif /* BB_FEATURE_VI_CRASHME */
3691: if (err_method == 0) {
3692: beep ();
3693: } else {
3694: flash (10);
3695: }
3696: }
3697:
3698: //----- Screen[] Routines --------------------------------------
3699: //----- Erase the Screen[] memory ------------------------------
3700: static void screen_erase()
3701: {
3702: memset (screen, ' ', screensize); // clear new screen
3703: }
3704:
3705: //----- Draw the status line at bottom of the screen -------------
3706: static void show_status_line(void)
3707: {
3708: static int last_cksum;
3709: int l, cnt, cksum;
3710:
3711: cnt = strlen ((char *) status_buffer);
3712: for (cksum = l = 0; l < cnt; l++) { cksum += (int) (status_buffer[l]); }
3713: // don't write the status line unless it changes
3714: if (cnt > 0 && last_cksum != cksum) {
3715: last_cksum = cksum; // remember if we have seen this line
3716: place_cursor (rows - 1, 0, FALSE); // put cursor on status line
3717: write (1, status_buffer, cnt);
3718: clear_to_eol ();
3719: place_cursor (crow, ccol, FALSE); // put cursor back in correct place
3720: }
3721: }
3722:
3723: //----- format the status buffer, the bottom line of screen ------
3724: // print status buffer, with STANDOUT mode
3725: static void psbs(char *format, ...)
3726: {
3727: va_list args;
3728:
3729: va_start (args, format);
3730: /* FIXED strcpy((char *) status_buffer, SOs); */
3731: strlcpy((char *) status_buffer, SOs, BUFSIZ_STATBUF); // Terminal standout mode on
3732: vsprintf ((char *) status_buffer + strlen ((char *) status_buffer), format,
3733: args);
3734: /* FIXED strcat((char *) status_buffer, SOn); */
3735: strlcat((char *) status_buffer, SOn, BUFSIZ_STATBUF); // Terminal standout mode off
3736: va_end (args);
3737:
3738: return;
3739: }
3740:
3741: // print status buffer
3742: static void psb(char *format, ...)
3743: {
3744: va_list args;
3745:
3746: va_start (args, format);
3747: vsprintf ((char *) status_buffer, format, args);
3748: va_end (args);
3749: return;
3750: }
3751:
3752: static void ni(Byte * s) // display messages
3753: {
3754: Byte buf[BUFSIZ];
3755:
3756: print_literal (buf, s);
3757: psbs ("\'%s\' is not implemented", buf);
3758: }
3759:
3760: static void edit_status(void) // show file status on status line
3761: {
3762: int cur, tot, percent;
3763:
3764: cur = count_lines (text, dot);
3765: tot = count_lines (text, end - 1);
3766: // current line percent
3767: // ------------- ~~ ----------
3768: // total lines 100
3769: if (tot > 0) {
3770: percent = (100 * cur) / tot;
3771: } else {
3772: cur = tot = 0;
3773: percent = 100;
3774: }
3775: psb ("\"%s\""
3776: #ifdef BB_FEATURE_VI_READONLY
3777: "%s"
3778: #endif /* BB_FEATURE_VI_READONLY */
3779: "%s line %d of %d --%d%%--",
3780: (cfn != 0 ? (char *) cfn : "No file"),
3781: #ifdef BB_FEATURE_VI_READONLY
3782: ((vi_readonly == TRUE || readonly == TRUE) ? " [Read only]" : ""),
3783: #endif /* BB_FEATURE_VI_READONLY */
3784: (file_modified == TRUE ? " [modified]" : ""),
3785: cur, tot, percent);
3786: }
3787:
3788: //----- Force refresh of all Lines -----------------------------
3789: static void redraw(int full_screen)
3790: {
3791: place_cursor (0, 0, FALSE); // put cursor in correct place
3792: clear_to_eos (); // tel terminal to erase display
3793: screen_erase (); // erase the internal screen buffer
3794: refresh (full_screen); // this will redraw the entire display
3795: }
3796:
3797: //----- Format a text[] line into a buffer ---------------------
3798: static void format_line(Byte * dest, Byte * src, int li)
3799: {
3800: int co;
3801: Byte c;
3802:
3803: for (co = 0; co < MAX_SCR_COLS; co++) {
3804: c = ' '; // assume blank
3805: if (li > 0 && co == 0) {
3806: c = '~'; // not first line, assume Tilde
3807: }
3808: // are there chars in text[] and have we gone past the end
3809: if (text < end && src < end) {
3810: c = *src++;
3811: }
3812: if (c == '\n')
3813: break;
3814: if (c < ' ' || c > '~') {
3815: if (c == '\t') {
3816: c = ' ';
3817: // co % 8 != 7
3818: for (; (co % tabstop) != (tabstop - 1); co++) {
3819: dest[co] = c;
3820: }
3821: } else {
3822: dest[co++] = '^';
3823: c |= '@'; // make it visible
3824: c &= 0x7f; // get rid of hi bit
3825: }
3826: }
3827: // the co++ is done here so that the column will
3828: // not be overwritten when we blank-out the rest of line
3829: dest[co] = c;
3830: if (src >= end)
3831: break;
3832: }
3833: }
3834:
3835: //----- Refresh the changed screen lines -----------------------
3836: // Copy the source line from text[] into the buffer and note
3837: // if the current screenline is different from the new buffer.
3838: // If they differ then that line needs redrawing on the terminal.
3839: //
3840: static void refresh(int full_screen)
3841: {
3842: static int old_offset;
3843: int li, changed;
3844: Byte buf[MAX_SCR_COLS];
3845: Byte *tp, *sp; // pointer into text[] and screen[]
3846: #ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
3847: int last_li = -2; // last line that changed- for optimizing cursor movement
3848: #endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
3849:
3850: #ifdef BB_FEATURE_VI_WIN_RESIZE
3851: window_size_get (0);
3852: #endif /* BB_FEATURE_VI_WIN_RESIZE */
3853: sync_cursor (dot, &crow, &ccol); // where cursor will be (on "dot")
3854: tp = screenbegin; // index into text[] of top line
3855:
3856: // compare text[] to screen[] and mark screen[] lines that need updating
3857: for (li = 0; li < rows - 1; li++) {
3858: int cs, ce; // column start & end
3859: memset (buf, ' ', MAX_SCR_COLS); // blank-out the buffer
3860: buf[MAX_SCR_COLS - 1] = 0; // NULL terminate the buffer
3861: // format current text line into buf
3862: format_line (buf, tp, li);
3863:
3864: // skip to the end of the current text[] line
3865: while (tp < end && *tp++ != '\n') /*no-op */ ;
3866:
3867: // see if there are any changes between vitual screen and buf
3868: changed = FALSE; // assume no change
3869: cs = 0;
3870: ce = columns - 1;
3871: sp = &screen[li * columns]; // start of screen line
3872: if (full_screen == TRUE) {
3873: // force re-draw of every single column from 0 - columns-1
3874: goto re0;
3875: }
3876: // compare newly formatted buffer with virtual screen
3877: // look forward for first difference between buf and screen
3878: for (; cs <= ce; cs++) {
3879: if (buf[cs + offset] != sp[cs]) {
3880: changed = TRUE; // mark for redraw
3881: break;
3882: }
3883: }
3884:
3885: // look backward for last difference between buf and screen
3886: for (; ce >= cs; ce--) {
3887: if (buf[ce + offset] != sp[ce]) {
3888: changed = TRUE; // mark for redraw
3889: break;
3890: }
3891: }
3892: // now, cs is index of first diff, and ce is index of last diff
3893:
3894: // if horz offset has changed, force a redraw
3895: if (offset != old_offset) {
3896: re0:
3897: changed = TRUE;
3898: }
3899:
3900: // make a sanity check of columns indexes
3901: if (cs < 0) cs = 0;
3902: if (ce > columns - 1) ce = columns - 1;
3903: if (cs > ce) { cs = 0; ce = columns - 1; }
3904: // is there a change between vitual screen and buf
3905: if (changed == TRUE) {
3906: // copy changed part of buffer to virtual screen
3907: memmove (sp + cs, buf + (cs + offset), ce - cs + 1);
3908:
3909: // move cursor to column of first change
3910: if (offset != old_offset) {
3911: // opti_cur_move is still too stupid
3912: // to handle offsets correctly
3913: place_cursor (li, cs, FALSE);
3914: } else {
3915: #ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
3916: // if this just the next line
3917: // try to optimize cursor movement
3918: // otherwise, use standard ESC sequence
3919: place_cursor (li, cs, li == (last_li + 1) ? TRUE : FALSE);
3920: last_li = li;
3921: #else /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
3922: place_cursor (li, cs, FALSE); // use standard ESC sequence
3923: #endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
3924: }
3925:
3926: // write line out to terminal
3927: write (1, sp + cs, ce - cs + 1);
3928: #ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
3929: last_row = li;
3930: #endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
3931: }
3932: }
3933:
3934: #ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
3935: place_cursor (crow, ccol, (crow == last_row) ? TRUE : FALSE);
3936: last_row = crow;
3937: #else
3938: place_cursor (crow, ccol, FALSE);
3939: #endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
3940:
3941: if (offset != old_offset)
3942: old_offset = offset;
3943: }
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