Contents of /tags/mkinitrd-6_2_0/editors/vi.c
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Sun May 30 11:53:18 2010 UTC (14 years ago) by niro
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Sun May 30 11:53:18 2010 UTC (14 years ago) by niro
File MIME type: text/plain
File size: 109072 byte(s)
tagged 'mkinitrd-6_2_0'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * tiny vi.c: A small 'vi' clone |
4 | * Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com> |
5 | * |
6 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. |
7 | */ |
8 | |
9 | /* |
10 | * Things To Do: |
11 | * EXINIT |
12 | * $HOME/.exrc and ./.exrc |
13 | * add magic to search /foo.*bar |
14 | * add :help command |
15 | * :map macros |
16 | * if mark[] values were line numbers rather than pointers |
17 | * it would be easier to change the mark when add/delete lines |
18 | * More intelligence in refresh() |
19 | * ":r !cmd" and "!cmd" to filter text through an external command |
20 | * A true "undo" facility |
21 | * An "ex" line oriented mode- maybe using "cmdedit" |
22 | */ |
23 | |
24 | #include "libbb.h" |
25 | |
26 | /* the CRASHME code is unmaintained, and doesn't currently build */ |
27 | #define ENABLE_FEATURE_VI_CRASHME 0 |
28 | |
29 | |
30 | #if ENABLE_LOCALE_SUPPORT |
31 | |
32 | #if ENABLE_FEATURE_VI_8BIT |
33 | //FIXME: this does not work properly for Unicode anyway |
34 | # define Isprint(c) (isprint)(c) |
35 | #else |
36 | # define Isprint(c) isprint_asciionly(c) |
37 | #endif |
38 | |
39 | #else |
40 | |
41 | /* 0x9b is Meta-ESC */ |
42 | #if ENABLE_FEATURE_VI_8BIT |
43 | #define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b) |
44 | #else |
45 | #define Isprint(c) ((unsigned char)(c) >= ' ' && (unsigned char)(c) < 0x7f) |
46 | #endif |
47 | |
48 | #endif |
49 | |
50 | |
51 | enum { |
52 | MAX_TABSTOP = 32, // sanity limit |
53 | // User input len. Need not be extra big. |
54 | // Lines in file being edited *can* be bigger than this. |
55 | MAX_INPUT_LEN = 128, |
56 | // Sanity limits. We have only one buffer of this size. |
57 | MAX_SCR_COLS = CONFIG_FEATURE_VI_MAX_LEN, |
58 | MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN, |
59 | }; |
60 | |
61 | /* vt102 typical ESC sequence */ |
62 | /* terminal standout start/normal ESC sequence */ |
63 | static const char SOs[] ALIGN1 = "\033[7m"; |
64 | static const char SOn[] ALIGN1 = "\033[0m"; |
65 | /* terminal bell sequence */ |
66 | static const char bell[] ALIGN1 = "\007"; |
67 | /* Clear-end-of-line and Clear-end-of-screen ESC sequence */ |
68 | static const char Ceol[] ALIGN1 = "\033[0K"; |
69 | static const char Ceos[] ALIGN1 = "\033[0J"; |
70 | /* Cursor motion arbitrary destination ESC sequence */ |
71 | static const char CMrc[] ALIGN1 = "\033[%d;%dH"; |
72 | /* Cursor motion up and down ESC sequence */ |
73 | static const char CMup[] ALIGN1 = "\033[A"; |
74 | static const char CMdown[] ALIGN1 = "\n"; |
75 | |
76 | #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK |
77 | // cmds modifying text[] |
78 | // vda: removed "aAiIs" as they switch us into insert mode |
79 | // and remembering input for replay after them makes no sense |
80 | static const char modifying_cmds[] = "cCdDJoOpPrRxX<>~"; |
81 | #endif |
82 | |
83 | enum { |
84 | YANKONLY = FALSE, |
85 | YANKDEL = TRUE, |
86 | FORWARD = 1, // code depends on "1" for array index |
87 | BACK = -1, // code depends on "-1" for array index |
88 | LIMITED = 0, // how much of text[] in char_search |
89 | FULL = 1, // how much of text[] in char_search |
90 | |
91 | S_BEFORE_WS = 1, // used in skip_thing() for moving "dot" |
92 | S_TO_WS = 2, // used in skip_thing() for moving "dot" |
93 | S_OVER_WS = 3, // used in skip_thing() for moving "dot" |
94 | S_END_PUNCT = 4, // used in skip_thing() for moving "dot" |
95 | S_END_ALNUM = 5, // used in skip_thing() for moving "dot" |
96 | }; |
97 | |
98 | |
99 | /* vi.c expects chars to be unsigned. */ |
100 | /* busybox build system provides that, but it's better */ |
101 | /* to audit and fix the source */ |
102 | |
103 | struct globals { |
104 | /* many references - keep near the top of globals */ |
105 | char *text, *end; // pointers to the user data in memory |
106 | char *dot; // where all the action takes place |
107 | int text_size; // size of the allocated buffer |
108 | |
109 | /* the rest */ |
110 | smallint vi_setops; |
111 | #define VI_AUTOINDENT 1 |
112 | #define VI_SHOWMATCH 2 |
113 | #define VI_IGNORECASE 4 |
114 | #define VI_ERR_METHOD 8 |
115 | #define autoindent (vi_setops & VI_AUTOINDENT) |
116 | #define showmatch (vi_setops & VI_SHOWMATCH ) |
117 | #define ignorecase (vi_setops & VI_IGNORECASE) |
118 | /* indicate error with beep or flash */ |
119 | #define err_method (vi_setops & VI_ERR_METHOD) |
120 | |
121 | #if ENABLE_FEATURE_VI_READONLY |
122 | smallint readonly_mode; |
123 | #define SET_READONLY_FILE(flags) ((flags) |= 0x01) |
124 | #define SET_READONLY_MODE(flags) ((flags) |= 0x02) |
125 | #define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe) |
126 | #else |
127 | #define SET_READONLY_FILE(flags) ((void)0) |
128 | #define SET_READONLY_MODE(flags) ((void)0) |
129 | #define UNSET_READONLY_FILE(flags) ((void)0) |
130 | #endif |
131 | |
132 | smallint editing; // >0 while we are editing a file |
133 | // [code audit says "can be 0, 1 or 2 only"] |
134 | smallint cmd_mode; // 0=command 1=insert 2=replace |
135 | int file_modified; // buffer contents changed (counter, not flag!) |
136 | int last_file_modified; // = -1; |
137 | int fn_start; // index of first cmd line file name |
138 | int save_argc; // how many file names on cmd line |
139 | int cmdcnt; // repetition count |
140 | unsigned rows, columns; // the terminal screen is this size |
141 | int crow, ccol; // cursor is on Crow x Ccol |
142 | int offset; // chars scrolled off the screen to the left |
143 | int have_status_msg; // is default edit status needed? |
144 | // [don't make smallint!] |
145 | int last_status_cksum; // hash of current status line |
146 | char *current_filename; |
147 | char *screenbegin; // index into text[], of top line on the screen |
148 | char *screen; // pointer to the virtual screen buffer |
149 | int screensize; // and its size |
150 | int tabstop; |
151 | int last_forward_char; // last char searched for with 'f' (int because of Unicode) |
152 | char erase_char; // the users erase character |
153 | char last_input_char; // last char read from user |
154 | |
155 | #if ENABLE_FEATURE_VI_DOT_CMD |
156 | smallint adding2q; // are we currently adding user input to q |
157 | int lmc_len; // length of last_modifying_cmd |
158 | char *ioq, *ioq_start; // pointer to string for get_one_char to "read" |
159 | #endif |
160 | #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR |
161 | int last_row; // where the cursor was last moved to |
162 | #endif |
163 | #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME |
164 | int my_pid; |
165 | #endif |
166 | #if ENABLE_FEATURE_VI_SEARCH |
167 | char *last_search_pattern; // last pattern from a '/' or '?' search |
168 | #endif |
169 | |
170 | /* former statics */ |
171 | #if ENABLE_FEATURE_VI_YANKMARK |
172 | char *edit_file__cur_line; |
173 | #endif |
174 | int refresh__old_offset; |
175 | int format_edit_status__tot; |
176 | |
177 | /* a few references only */ |
178 | #if ENABLE_FEATURE_VI_YANKMARK |
179 | int YDreg, Ureg; // default delete register and orig line for "U" |
180 | char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27 |
181 | char *mark[28]; // user marks points somewhere in text[]- a-z and previous context '' |
182 | char *context_start, *context_end; |
183 | #endif |
184 | #if ENABLE_FEATURE_VI_USE_SIGNALS |
185 | sigjmp_buf restart; // catch_sig() |
186 | #endif |
187 | struct termios term_orig, term_vi; // remember what the cooked mode was |
188 | #if ENABLE_FEATURE_VI_COLON |
189 | char *initial_cmds[3]; // currently 2 entries, NULL terminated |
190 | #endif |
191 | // Should be just enough to hold a key sequence, |
192 | // but CRASHME mode uses it as generated command buffer too |
193 | #if ENABLE_FEATURE_VI_CRASHME |
194 | char readbuffer[128]; |
195 | #else |
196 | char readbuffer[KEYCODE_BUFFER_SIZE]; |
197 | #endif |
198 | #define STATUS_BUFFER_LEN 200 |
199 | char status_buffer[STATUS_BUFFER_LEN]; // messages to the user |
200 | #if ENABLE_FEATURE_VI_DOT_CMD |
201 | char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "." |
202 | #endif |
203 | char get_input_line__buf[MAX_INPUT_LEN]; /* former static */ |
204 | |
205 | char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2]; |
206 | }; |
207 | #define G (*ptr_to_globals) |
208 | #define text (G.text ) |
209 | #define text_size (G.text_size ) |
210 | #define end (G.end ) |
211 | #define dot (G.dot ) |
212 | #define reg (G.reg ) |
213 | |
214 | #define vi_setops (G.vi_setops ) |
215 | #define editing (G.editing ) |
216 | #define cmd_mode (G.cmd_mode ) |
217 | #define file_modified (G.file_modified ) |
218 | #define last_file_modified (G.last_file_modified ) |
219 | #define fn_start (G.fn_start ) |
220 | #define save_argc (G.save_argc ) |
221 | #define cmdcnt (G.cmdcnt ) |
222 | #define rows (G.rows ) |
223 | #define columns (G.columns ) |
224 | #define crow (G.crow ) |
225 | #define ccol (G.ccol ) |
226 | #define offset (G.offset ) |
227 | #define status_buffer (G.status_buffer ) |
228 | #define have_status_msg (G.have_status_msg ) |
229 | #define last_status_cksum (G.last_status_cksum ) |
230 | #define current_filename (G.current_filename ) |
231 | #define screen (G.screen ) |
232 | #define screensize (G.screensize ) |
233 | #define screenbegin (G.screenbegin ) |
234 | #define tabstop (G.tabstop ) |
235 | #define last_forward_char (G.last_forward_char ) |
236 | #define erase_char (G.erase_char ) |
237 | #define last_input_char (G.last_input_char ) |
238 | #if ENABLE_FEATURE_VI_READONLY |
239 | #define readonly_mode (G.readonly_mode ) |
240 | #else |
241 | #define readonly_mode 0 |
242 | #endif |
243 | #define adding2q (G.adding2q ) |
244 | #define lmc_len (G.lmc_len ) |
245 | #define ioq (G.ioq ) |
246 | #define ioq_start (G.ioq_start ) |
247 | #define last_row (G.last_row ) |
248 | #define my_pid (G.my_pid ) |
249 | #define last_search_pattern (G.last_search_pattern) |
250 | |
251 | #define edit_file__cur_line (G.edit_file__cur_line) |
252 | #define refresh__old_offset (G.refresh__old_offset) |
253 | #define format_edit_status__tot (G.format_edit_status__tot) |
254 | |
255 | #define YDreg (G.YDreg ) |
256 | #define Ureg (G.Ureg ) |
257 | #define mark (G.mark ) |
258 | #define context_start (G.context_start ) |
259 | #define context_end (G.context_end ) |
260 | #define restart (G.restart ) |
261 | #define term_orig (G.term_orig ) |
262 | #define term_vi (G.term_vi ) |
263 | #define initial_cmds (G.initial_cmds ) |
264 | #define readbuffer (G.readbuffer ) |
265 | #define scr_out_buf (G.scr_out_buf ) |
266 | #define last_modifying_cmd (G.last_modifying_cmd ) |
267 | #define get_input_line__buf (G.get_input_line__buf) |
268 | |
269 | #define INIT_G() do { \ |
270 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ |
271 | last_file_modified = -1; \ |
272 | /* "" but has space for 2 chars: */ \ |
273 | IF_FEATURE_VI_SEARCH(last_search_pattern = xzalloc(2);) \ |
274 | } while (0) |
275 | |
276 | |
277 | static int init_text_buffer(char *); // init from file or create new |
278 | static void edit_file(char *); // edit one file |
279 | static void do_cmd(int); // execute a command |
280 | static int next_tabstop(int); |
281 | static void sync_cursor(char *, int *, int *); // synchronize the screen cursor to dot |
282 | static char *begin_line(char *); // return pointer to cur line B-o-l |
283 | static char *end_line(char *); // return pointer to cur line E-o-l |
284 | static char *prev_line(char *); // return pointer to prev line B-o-l |
285 | static char *next_line(char *); // return pointer to next line B-o-l |
286 | static char *end_screen(void); // get pointer to last char on screen |
287 | static int count_lines(char *, char *); // count line from start to stop |
288 | static char *find_line(int); // find begining of line #li |
289 | static char *move_to_col(char *, int); // move "p" to column l |
290 | static void dot_left(void); // move dot left- dont leave line |
291 | static void dot_right(void); // move dot right- dont leave line |
292 | static void dot_begin(void); // move dot to B-o-l |
293 | static void dot_end(void); // move dot to E-o-l |
294 | static void dot_next(void); // move dot to next line B-o-l |
295 | static void dot_prev(void); // move dot to prev line B-o-l |
296 | static void dot_scroll(int, int); // move the screen up or down |
297 | static void dot_skip_over_ws(void); // move dot pat WS |
298 | static void dot_delete(void); // delete the char at 'dot' |
299 | static char *bound_dot(char *); // make sure text[0] <= P < "end" |
300 | static char *new_screen(int, int); // malloc virtual screen memory |
301 | static char *char_insert(char *, char); // insert the char c at 'p' |
302 | // might reallocate text[]! use p += stupid_insert(p, ...), |
303 | // and be careful to not use pointers into potentially freed text[]! |
304 | static uintptr_t stupid_insert(char *, char); // stupidly insert the char c at 'p' |
305 | static int find_range(char **, char **, char); // return pointers for an object |
306 | static int st_test(char *, int, int, char *); // helper for skip_thing() |
307 | static char *skip_thing(char *, int, int, int); // skip some object |
308 | static char *find_pair(char *, char); // find matching pair () [] {} |
309 | static char *text_hole_delete(char *, char *); // at "p", delete a 'size' byte hole |
310 | // might reallocate text[]! use p += text_hole_make(p, ...), |
311 | // and be careful to not use pointers into potentially freed text[]! |
312 | static uintptr_t text_hole_make(char *, int); // at "p", make a 'size' byte hole |
313 | static char *yank_delete(char *, char *, int, int); // yank text[] into register then delete |
314 | static void show_help(void); // display some help info |
315 | static void rawmode(void); // set "raw" mode on tty |
316 | static void cookmode(void); // return to "cooked" mode on tty |
317 | // sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready) |
318 | static int mysleep(int); |
319 | static int readit(void); // read (maybe cursor) key from stdin |
320 | static int get_one_char(void); // read 1 char from stdin |
321 | static int file_size(const char *); // what is the byte size of "fn" |
322 | #if !ENABLE_FEATURE_VI_READONLY |
323 | #define file_insert(fn, p, update_ro_status) file_insert(fn, p) |
324 | #endif |
325 | // file_insert might reallocate text[]! |
326 | static int file_insert(const char *, char *, int); |
327 | static int file_write(char *, char *, char *); |
328 | #if !ENABLE_FEATURE_VI_OPTIMIZE_CURSOR |
329 | #define place_cursor(a, b, optimize) place_cursor(a, b) |
330 | #endif |
331 | static void place_cursor(int, int, int); |
332 | static void screen_erase(void); |
333 | static void clear_to_eol(void); |
334 | static void clear_to_eos(void); |
335 | static void go_bottom_and_clear_to_eol(void); |
336 | static void standout_start(void); // send "start reverse video" sequence |
337 | static void standout_end(void); // send "end reverse video" sequence |
338 | static void flash(int); // flash the terminal screen |
339 | static void show_status_line(void); // put a message on the bottom line |
340 | static void status_line(const char *, ...); // print to status buf |
341 | static void status_line_bold(const char *, ...); |
342 | static void not_implemented(const char *); // display "Not implemented" message |
343 | static int format_edit_status(void); // format file status on status line |
344 | static void redraw(int); // force a full screen refresh |
345 | static char* format_line(char* /*, int*/); |
346 | static void refresh(int); // update the terminal from screen[] |
347 | |
348 | static void Indicate_Error(void); // use flash or beep to indicate error |
349 | #define indicate_error(c) Indicate_Error() |
350 | static void Hit_Return(void); |
351 | |
352 | #if ENABLE_FEATURE_VI_SEARCH |
353 | static char *char_search(char *, const char *, int, int); // search for pattern starting at p |
354 | static int mycmp(const char *, const char *, int); // string cmp based in "ignorecase" |
355 | #endif |
356 | #if ENABLE_FEATURE_VI_COLON |
357 | static char *get_one_address(char *, int *); // get colon addr, if present |
358 | static char *get_address(char *, int *, int *); // get two colon addrs, if present |
359 | static void colon(char *); // execute the "colon" mode cmds |
360 | #endif |
361 | #if ENABLE_FEATURE_VI_USE_SIGNALS |
362 | static void winch_sig(int); // catch window size changes |
363 | static void suspend_sig(int); // catch ctrl-Z |
364 | static void catch_sig(int); // catch ctrl-C and alarm time-outs |
365 | #endif |
366 | #if ENABLE_FEATURE_VI_DOT_CMD |
367 | static void start_new_cmd_q(char); // new queue for command |
368 | static void end_cmd_q(void); // stop saving input chars |
369 | #else |
370 | #define end_cmd_q() ((void)0) |
371 | #endif |
372 | #if ENABLE_FEATURE_VI_SETOPTS |
373 | static void showmatching(char *); // show the matching pair () [] {} |
374 | #endif |
375 | #if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME |
376 | // might reallocate text[]! use p += string_insert(p, ...), |
377 | // and be careful to not use pointers into potentially freed text[]! |
378 | static uintptr_t string_insert(char *, const char *); // insert the string at 'p' |
379 | #endif |
380 | #if ENABLE_FEATURE_VI_YANKMARK |
381 | static char *text_yank(char *, char *, int); // save copy of "p" into a register |
382 | static char what_reg(void); // what is letter of current YDreg |
383 | static void check_context(char); // remember context for '' command |
384 | #endif |
385 | #if ENABLE_FEATURE_VI_CRASHME |
386 | static void crash_dummy(); |
387 | static void crash_test(); |
388 | static int crashme = 0; |
389 | #endif |
390 | |
391 | |
392 | static void write1(const char *out) |
393 | { |
394 | fputs(out, stdout); |
395 | } |
396 | |
397 | int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
398 | int vi_main(int argc, char **argv) |
399 | { |
400 | int c; |
401 | |
402 | INIT_G(); |
403 | |
404 | #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME |
405 | my_pid = getpid(); |
406 | #endif |
407 | #if ENABLE_FEATURE_VI_CRASHME |
408 | srand((long) my_pid); |
409 | #endif |
410 | #ifdef NO_SUCH_APPLET_YET |
411 | /* If we aren't "vi", we are "view" */ |
412 | if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) { |
413 | SET_READONLY_MODE(readonly_mode); |
414 | } |
415 | #endif |
416 | |
417 | vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE; |
418 | // 1- process $HOME/.exrc file (not inplemented yet) |
419 | // 2- process EXINIT variable from environment |
420 | // 3- process command line args |
421 | #if ENABLE_FEATURE_VI_COLON |
422 | { |
423 | char *p = getenv("EXINIT"); |
424 | if (p && *p) |
425 | initial_cmds[0] = xstrndup(p, MAX_INPUT_LEN); |
426 | } |
427 | #endif |
428 | while ((c = getopt(argc, argv, "hCRH" IF_FEATURE_VI_COLON("c:"))) != -1) { |
429 | switch (c) { |
430 | #if ENABLE_FEATURE_VI_CRASHME |
431 | case 'C': |
432 | crashme = 1; |
433 | break; |
434 | #endif |
435 | #if ENABLE_FEATURE_VI_READONLY |
436 | case 'R': // Read-only flag |
437 | SET_READONLY_MODE(readonly_mode); |
438 | break; |
439 | #endif |
440 | #if ENABLE_FEATURE_VI_COLON |
441 | case 'c': // cmd line vi command |
442 | if (*optarg) |
443 | initial_cmds[initial_cmds[0] != 0] = xstrndup(optarg, MAX_INPUT_LEN); |
444 | break; |
445 | #endif |
446 | case 'H': |
447 | show_help(); |
448 | /* fall through */ |
449 | default: |
450 | bb_show_usage(); |
451 | return 1; |
452 | } |
453 | } |
454 | |
455 | // The argv array can be used by the ":next" and ":rewind" commands |
456 | // save optind. |
457 | fn_start = optind; // remember first file name for :next and :rew |
458 | save_argc = argc; |
459 | |
460 | //----- This is the main file handling loop -------------- |
461 | if (optind >= argc) { |
462 | edit_file(0); |
463 | } else { |
464 | for (; optind < argc; optind++) { |
465 | edit_file(argv[optind]); |
466 | } |
467 | } |
468 | //----------------------------------------------------------- |
469 | |
470 | return 0; |
471 | } |
472 | |
473 | /* read text from file or create an empty buf */ |
474 | /* will also update current_filename */ |
475 | static int init_text_buffer(char *fn) |
476 | { |
477 | int rc; |
478 | int size = file_size(fn); // file size. -1 means does not exist. |
479 | |
480 | /* allocate/reallocate text buffer */ |
481 | free(text); |
482 | text_size = size + 10240; |
483 | screenbegin = dot = end = text = xzalloc(text_size); |
484 | |
485 | if (fn != current_filename) { |
486 | free(current_filename); |
487 | current_filename = xstrdup(fn); |
488 | } |
489 | if (size < 0) { |
490 | // file dont exist. Start empty buf with dummy line |
491 | char_insert(text, '\n'); |
492 | rc = 0; |
493 | } else { |
494 | rc = file_insert(fn, text, 1); |
495 | } |
496 | file_modified = 0; |
497 | last_file_modified = -1; |
498 | #if ENABLE_FEATURE_VI_YANKMARK |
499 | /* init the marks. */ |
500 | memset(mark, 0, sizeof(mark)); |
501 | #endif |
502 | return rc; |
503 | } |
504 | |
505 | static void edit_file(char *fn) |
506 | { |
507 | #if ENABLE_FEATURE_VI_YANKMARK |
508 | #define cur_line edit_file__cur_line |
509 | #endif |
510 | int c; |
511 | int size; |
512 | #if ENABLE_FEATURE_VI_USE_SIGNALS |
513 | int sig; |
514 | #endif |
515 | |
516 | editing = 1; // 0 = exit, 1 = one file, 2 = multiple files |
517 | rawmode(); |
518 | rows = 24; |
519 | columns = 80; |
520 | size = 0; |
521 | if (ENABLE_FEATURE_VI_WIN_RESIZE) { |
522 | get_terminal_width_height(0, &columns, &rows); |
523 | if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS; |
524 | if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS; |
525 | } |
526 | new_screen(rows, columns); // get memory for virtual screen |
527 | init_text_buffer(fn); |
528 | |
529 | #if ENABLE_FEATURE_VI_YANKMARK |
530 | YDreg = 26; // default Yank/Delete reg |
531 | Ureg = 27; // hold orig line for "U" cmd |
532 | mark[26] = mark[27] = text; // init "previous context" |
533 | #endif |
534 | |
535 | last_forward_char = last_input_char = '\0'; |
536 | crow = 0; |
537 | ccol = 0; |
538 | |
539 | #if ENABLE_FEATURE_VI_USE_SIGNALS |
540 | catch_sig(0); |
541 | signal(SIGWINCH, winch_sig); |
542 | signal(SIGTSTP, suspend_sig); |
543 | sig = sigsetjmp(restart, 1); |
544 | if (sig != 0) { |
545 | screenbegin = dot = text; |
546 | } |
547 | #endif |
548 | |
549 | cmd_mode = 0; // 0=command 1=insert 2='R'eplace |
550 | cmdcnt = 0; |
551 | tabstop = 8; |
552 | offset = 0; // no horizontal offset |
553 | c = '\0'; |
554 | #if ENABLE_FEATURE_VI_DOT_CMD |
555 | free(ioq_start); |
556 | ioq = ioq_start = NULL; |
557 | lmc_len = 0; |
558 | adding2q = 0; |
559 | #endif |
560 | |
561 | #if ENABLE_FEATURE_VI_COLON |
562 | { |
563 | char *p, *q; |
564 | int n = 0; |
565 | |
566 | while ((p = initial_cmds[n])) { |
567 | do { |
568 | q = p; |
569 | p = strchr(q, '\n'); |
570 | if (p) |
571 | while (*p == '\n') |
572 | *p++ = '\0'; |
573 | if (*q) |
574 | colon(q); |
575 | } while (p); |
576 | free(initial_cmds[n]); |
577 | initial_cmds[n] = NULL; |
578 | n++; |
579 | } |
580 | } |
581 | #endif |
582 | redraw(FALSE); // dont force every col re-draw |
583 | //------This is the main Vi cmd handling loop ----------------------- |
584 | while (editing > 0) { |
585 | #if ENABLE_FEATURE_VI_CRASHME |
586 | if (crashme > 0) { |
587 | if ((end - text) > 1) { |
588 | crash_dummy(); // generate a random command |
589 | } else { |
590 | crashme = 0; |
591 | string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string |
592 | dot = text; |
593 | refresh(FALSE); |
594 | } |
595 | } |
596 | #endif |
597 | last_input_char = c = get_one_char(); // get a cmd from user |
598 | #if ENABLE_FEATURE_VI_YANKMARK |
599 | // save a copy of the current line- for the 'U" command |
600 | if (begin_line(dot) != cur_line) { |
601 | cur_line = begin_line(dot); |
602 | text_yank(begin_line(dot), end_line(dot), Ureg); |
603 | } |
604 | #endif |
605 | #if ENABLE_FEATURE_VI_DOT_CMD |
606 | // These are commands that change text[]. |
607 | // Remember the input for the "." command |
608 | if (!adding2q && ioq_start == NULL |
609 | && cmd_mode == 0 // command mode |
610 | && c > '\0' // exclude NUL and non-ASCII chars |
611 | && c < 0x7f // (Unicode and such) |
612 | && strchr(modifying_cmds, c) |
613 | ) { |
614 | start_new_cmd_q(c); |
615 | } |
616 | #endif |
617 | do_cmd(c); // execute the user command |
618 | |
619 | // poll to see if there is input already waiting. if we are |
620 | // not able to display output fast enough to keep up, skip |
621 | // the display update until we catch up with input. |
622 | if (!readbuffer[0] && mysleep(0) == 0) { |
623 | // no input pending - so update output |
624 | refresh(FALSE); |
625 | show_status_line(); |
626 | } |
627 | #if ENABLE_FEATURE_VI_CRASHME |
628 | if (crashme > 0) |
629 | crash_test(); // test editor variables |
630 | #endif |
631 | } |
632 | //------------------------------------------------------------------- |
633 | |
634 | go_bottom_and_clear_to_eol(); |
635 | cookmode(); |
636 | #undef cur_line |
637 | } |
638 | |
639 | //----- The Colon commands ------------------------------------- |
640 | #if ENABLE_FEATURE_VI_COLON |
641 | static char *get_one_address(char *p, int *addr) // get colon addr, if present |
642 | { |
643 | int st; |
644 | char *q; |
645 | IF_FEATURE_VI_YANKMARK(char c;) |
646 | IF_FEATURE_VI_SEARCH(char *pat;) |
647 | |
648 | *addr = -1; // assume no addr |
649 | if (*p == '.') { // the current line |
650 | p++; |
651 | q = begin_line(dot); |
652 | *addr = count_lines(text, q); |
653 | } |
654 | #if ENABLE_FEATURE_VI_YANKMARK |
655 | else if (*p == '\'') { // is this a mark addr |
656 | p++; |
657 | c = tolower(*p); |
658 | p++; |
659 | if (c >= 'a' && c <= 'z') { |
660 | // we have a mark |
661 | c = c - 'a'; |
662 | q = mark[(unsigned char) c]; |
663 | if (q != NULL) { // is mark valid |
664 | *addr = count_lines(text, q); |
665 | } |
666 | } |
667 | } |
668 | #endif |
669 | #if ENABLE_FEATURE_VI_SEARCH |
670 | else if (*p == '/') { // a search pattern |
671 | q = strchrnul(++p, '/'); |
672 | pat = xstrndup(p, q - p); // save copy of pattern |
673 | p = q; |
674 | if (*p == '/') |
675 | p++; |
676 | q = char_search(dot, pat, FORWARD, FULL); |
677 | if (q != NULL) { |
678 | *addr = count_lines(text, q); |
679 | } |
680 | free(pat); |
681 | } |
682 | #endif |
683 | else if (*p == '$') { // the last line in file |
684 | p++; |
685 | q = begin_line(end - 1); |
686 | *addr = count_lines(text, q); |
687 | } else if (isdigit(*p)) { // specific line number |
688 | sscanf(p, "%d%n", addr, &st); |
689 | p += st; |
690 | } else { |
691 | // unrecognized address - assume -1 |
692 | *addr = -1; |
693 | } |
694 | return p; |
695 | } |
696 | |
697 | static char *get_address(char *p, int *b, int *e) // get two colon addrs, if present |
698 | { |
699 | //----- get the address' i.e., 1,3 'a,'b ----- |
700 | // get FIRST addr, if present |
701 | while (isblank(*p)) |
702 | p++; // skip over leading spaces |
703 | if (*p == '%') { // alias for 1,$ |
704 | p++; |
705 | *b = 1; |
706 | *e = count_lines(text, end-1); |
707 | goto ga0; |
708 | } |
709 | p = get_one_address(p, b); |
710 | while (isblank(*p)) |
711 | p++; |
712 | if (*p == ',') { // is there a address separator |
713 | p++; |
714 | while (isblank(*p)) |
715 | p++; |
716 | // get SECOND addr, if present |
717 | p = get_one_address(p, e); |
718 | } |
719 | ga0: |
720 | while (isblank(*p)) |
721 | p++; // skip over trailing spaces |
722 | return p; |
723 | } |
724 | |
725 | #if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS |
726 | static void setops(const char *args, const char *opname, int flg_no, |
727 | const char *short_opname, int opt) |
728 | { |
729 | const char *a = args + flg_no; |
730 | int l = strlen(opname) - 1; /* opname have + ' ' */ |
731 | |
732 | // maybe strncmp? we had tons of erroneous strncasecmp's... |
733 | if (strncasecmp(a, opname, l) == 0 |
734 | || strncasecmp(a, short_opname, 2) == 0 |
735 | ) { |
736 | if (flg_no) |
737 | vi_setops &= ~opt; |
738 | else |
739 | vi_setops |= opt; |
740 | } |
741 | } |
742 | #endif |
743 | |
744 | // buf must be no longer than MAX_INPUT_LEN! |
745 | static void colon(char *buf) |
746 | { |
747 | char c, *orig_buf, *buf1, *q, *r; |
748 | char *fn, cmd[MAX_INPUT_LEN], args[MAX_INPUT_LEN]; |
749 | int i, l, li, ch, b, e; |
750 | int useforce, forced = FALSE; |
751 | |
752 | // :3154 // if (-e line 3154) goto it else stay put |
753 | // :4,33w! foo // write a portion of buffer to file "foo" |
754 | // :w // write all of buffer to current file |
755 | // :q // quit |
756 | // :q! // quit- dont care about modified file |
757 | // :'a,'z!sort -u // filter block through sort |
758 | // :'f // goto mark "f" |
759 | // :'fl // list literal the mark "f" line |
760 | // :.r bar // read file "bar" into buffer before dot |
761 | // :/123/,/abc/d // delete lines from "123" line to "abc" line |
762 | // :/xyz/ // goto the "xyz" line |
763 | // :s/find/replace/ // substitute pattern "find" with "replace" |
764 | // :!<cmd> // run <cmd> then return |
765 | // |
766 | |
767 | if (!buf[0]) |
768 | goto vc1; |
769 | if (*buf == ':') |
770 | buf++; // move past the ':' |
771 | |
772 | li = ch = i = 0; |
773 | b = e = -1; |
774 | q = text; // assume 1,$ for the range |
775 | r = end - 1; |
776 | li = count_lines(text, end - 1); |
777 | fn = current_filename; |
778 | |
779 | // look for optional address(es) :. :1 :1,9 :'q,'a :% |
780 | buf = get_address(buf, &b, &e); |
781 | |
782 | // remember orig command line |
783 | orig_buf = buf; |
784 | |
785 | // get the COMMAND into cmd[] |
786 | buf1 = cmd; |
787 | while (*buf != '\0') { |
788 | if (isspace(*buf)) |
789 | break; |
790 | *buf1++ = *buf++; |
791 | } |
792 | *buf1 = '\0'; |
793 | // get any ARGuments |
794 | while (isblank(*buf)) |
795 | buf++; |
796 | strcpy(args, buf); |
797 | useforce = FALSE; |
798 | buf1 = last_char_is(cmd, '!'); |
799 | if (buf1) { |
800 | useforce = TRUE; |
801 | *buf1 = '\0'; // get rid of ! |
802 | } |
803 | if (b >= 0) { |
804 | // if there is only one addr, then the addr |
805 | // is the line number of the single line the |
806 | // user wants. So, reset the end |
807 | // pointer to point at end of the "b" line |
808 | q = find_line(b); // what line is #b |
809 | r = end_line(q); |
810 | li = 1; |
811 | } |
812 | if (e >= 0) { |
813 | // we were given two addrs. change the |
814 | // end pointer to the addr given by user. |
815 | r = find_line(e); // what line is #e |
816 | r = end_line(r); |
817 | li = e - b + 1; |
818 | } |
819 | // ------------ now look for the command ------------ |
820 | i = strlen(cmd); |
821 | if (i == 0) { // :123CR goto line #123 |
822 | if (b >= 0) { |
823 | dot = find_line(b); // what line is #b |
824 | dot_skip_over_ws(); |
825 | } |
826 | } |
827 | #if ENABLE_FEATURE_ALLOW_EXEC |
828 | else if (cmd[0] == '!') { // run a cmd |
829 | int retcode; |
830 | // :!ls run the <cmd> |
831 | go_bottom_and_clear_to_eol(); |
832 | cookmode(); |
833 | retcode = system(orig_buf + 1); // run the cmd |
834 | if (retcode) |
835 | printf("\nshell returned %i\n\n", retcode); |
836 | rawmode(); |
837 | Hit_Return(); // let user see results |
838 | } |
839 | #endif |
840 | else if (cmd[0] == '=' && !cmd[1]) { // where is the address |
841 | if (b < 0) { // no addr given- use defaults |
842 | b = e = count_lines(text, dot); |
843 | } |
844 | status_line("%d", b); |
845 | } else if (strncmp(cmd, "delete", i) == 0) { // delete lines |
846 | if (b < 0) { // no addr given- use defaults |
847 | q = begin_line(dot); // assume .,. for the range |
848 | r = end_line(dot); |
849 | } |
850 | dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines |
851 | dot_skip_over_ws(); |
852 | } else if (strncmp(cmd, "edit", i) == 0) { // Edit a file |
853 | // don't edit, if the current file has been modified |
854 | if (file_modified && !useforce) { |
855 | status_line_bold("No write since last change (:edit! overrides)"); |
856 | goto vc1; |
857 | } |
858 | if (args[0]) { |
859 | // the user supplied a file name |
860 | fn = args; |
861 | } else if (current_filename && current_filename[0]) { |
862 | // no user supplied name- use the current filename |
863 | // fn = current_filename; was set by default |
864 | } else { |
865 | // no user file name, no current name- punt |
866 | status_line_bold("No current filename"); |
867 | goto vc1; |
868 | } |
869 | |
870 | if (init_text_buffer(fn) < 0) |
871 | goto vc1; |
872 | |
873 | #if ENABLE_FEATURE_VI_YANKMARK |
874 | if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) { |
875 | free(reg[Ureg]); // free orig line reg- for 'U' |
876 | reg[Ureg]= 0; |
877 | } |
878 | if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) { |
879 | free(reg[YDreg]); // free default yank/delete register |
880 | reg[YDreg]= 0; |
881 | } |
882 | #endif |
883 | // how many lines in text[]? |
884 | li = count_lines(text, end - 1); |
885 | status_line("\"%s\"%s" |
886 | IF_FEATURE_VI_READONLY("%s") |
887 | " %dL, %dC", current_filename, |
888 | (file_size(fn) < 0 ? " [New file]" : ""), |
889 | IF_FEATURE_VI_READONLY( |
890 | ((readonly_mode) ? " [Readonly]" : ""), |
891 | ) |
892 | li, ch); |
893 | } else if (strncmp(cmd, "file", i) == 0) { // what File is this |
894 | if (b != -1 || e != -1) { |
895 | status_line_bold("No address allowed on this command"); |
896 | goto vc1; |
897 | } |
898 | if (args[0]) { |
899 | // user wants a new filename |
900 | free(current_filename); |
901 | current_filename = xstrdup(args); |
902 | } else { |
903 | // user wants file status info |
904 | last_status_cksum = 0; // force status update |
905 | } |
906 | } else if (strncmp(cmd, "features", i) == 0) { // what features are available |
907 | // print out values of all features |
908 | go_bottom_and_clear_to_eol(); |
909 | cookmode(); |
910 | show_help(); |
911 | rawmode(); |
912 | Hit_Return(); |
913 | } else if (strncmp(cmd, "list", i) == 0) { // literal print line |
914 | if (b < 0) { // no addr given- use defaults |
915 | q = begin_line(dot); // assume .,. for the range |
916 | r = end_line(dot); |
917 | } |
918 | go_bottom_and_clear_to_eol(); |
919 | puts("\r"); |
920 | for (; q <= r; q++) { |
921 | int c_is_no_print; |
922 | |
923 | c = *q; |
924 | c_is_no_print = (c & 0x80) && !Isprint(c); |
925 | if (c_is_no_print) { |
926 | c = '.'; |
927 | standout_start(); |
928 | } |
929 | if (c == '\n') { |
930 | write1("$\r"); |
931 | } else if (c < ' ' || c == 127) { |
932 | bb_putchar('^'); |
933 | if (c == 127) |
934 | c = '?'; |
935 | else |
936 | c += '@'; |
937 | } |
938 | bb_putchar(c); |
939 | if (c_is_no_print) |
940 | standout_end(); |
941 | } |
942 | #if ENABLE_FEATURE_VI_SET |
943 | vc2: |
944 | #endif |
945 | Hit_Return(); |
946 | } else if (strncmp(cmd, "quit", i) == 0 // Quit |
947 | || strncmp(cmd, "next", i) == 0 // edit next file |
948 | ) { |
949 | if (useforce) { |
950 | // force end of argv list |
951 | if (*cmd == 'q') { |
952 | optind = save_argc; |
953 | } |
954 | editing = 0; |
955 | goto vc1; |
956 | } |
957 | // don't exit if the file been modified |
958 | if (file_modified) { |
959 | status_line_bold("No write since last change (:%s! overrides)", |
960 | (*cmd == 'q' ? "quit" : "next")); |
961 | goto vc1; |
962 | } |
963 | // are there other file to edit |
964 | if (*cmd == 'q' && optind < save_argc - 1) { |
965 | status_line_bold("%d more file to edit", (save_argc - optind - 1)); |
966 | goto vc1; |
967 | } |
968 | if (*cmd == 'n' && optind >= save_argc - 1) { |
969 | status_line_bold("No more files to edit"); |
970 | goto vc1; |
971 | } |
972 | editing = 0; |
973 | } else if (strncmp(cmd, "read", i) == 0) { // read file into text[] |
974 | fn = args; |
975 | if (!fn[0]) { |
976 | status_line_bold("No filename given"); |
977 | goto vc1; |
978 | } |
979 | if (b < 0) { // no addr given- use defaults |
980 | q = begin_line(dot); // assume "dot" |
981 | } |
982 | // read after current line- unless user said ":0r foo" |
983 | if (b != 0) |
984 | q = next_line(q); |
985 | { // dance around potentially-reallocated text[] |
986 | uintptr_t ofs = q - text; |
987 | ch = file_insert(fn, q, 0); |
988 | q = text + ofs; |
989 | } |
990 | if (ch < 0) |
991 | goto vc1; // nothing was inserted |
992 | // how many lines in text[]? |
993 | li = count_lines(q, q + ch - 1); |
994 | status_line("\"%s\"" |
995 | IF_FEATURE_VI_READONLY("%s") |
996 | " %dL, %dC", fn, |
997 | IF_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),) |
998 | li, ch); |
999 | if (ch > 0) { |
1000 | // if the insert is before "dot" then we need to update |
1001 | if (q <= dot) |
1002 | dot += ch; |
1003 | /*file_modified++; - done by file_insert */ |
1004 | } |
1005 | } else if (strncmp(cmd, "rewind", i) == 0) { // rewind cmd line args |
1006 | if (file_modified && !useforce) { |
1007 | status_line_bold("No write since last change (:rewind! overrides)"); |
1008 | } else { |
1009 | // reset the filenames to edit |
1010 | optind = fn_start - 1; |
1011 | editing = 0; |
1012 | } |
1013 | #if ENABLE_FEATURE_VI_SET |
1014 | } else if (strncmp(cmd, "set", i) == 0) { // set or clear features |
1015 | #if ENABLE_FEATURE_VI_SETOPTS |
1016 | char *argp; |
1017 | #endif |
1018 | i = 0; // offset into args |
1019 | // only blank is regarded as args delmiter. What about tab '\t' ? |
1020 | if (!args[0] || strcasecmp(args, "all") == 0) { |
1021 | // print out values of all options |
1022 | go_bottom_and_clear_to_eol(); |
1023 | printf("----------------------------------------\r\n"); |
1024 | #if ENABLE_FEATURE_VI_SETOPTS |
1025 | if (!autoindent) |
1026 | printf("no"); |
1027 | printf("autoindent "); |
1028 | if (!err_method) |
1029 | printf("no"); |
1030 | printf("flash "); |
1031 | if (!ignorecase) |
1032 | printf("no"); |
1033 | printf("ignorecase "); |
1034 | if (!showmatch) |
1035 | printf("no"); |
1036 | printf("showmatch "); |
1037 | printf("tabstop=%d ", tabstop); |
1038 | #endif |
1039 | printf("\r\n"); |
1040 | goto vc2; |
1041 | } |
1042 | #if ENABLE_FEATURE_VI_SETOPTS |
1043 | argp = args; |
1044 | while (*argp) { |
1045 | if (strncmp(argp, "no", 2) == 0) |
1046 | i = 2; // ":set noautoindent" |
1047 | setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT); |
1048 | setops(argp, "flash ", i, "fl", VI_ERR_METHOD); |
1049 | setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE); |
1050 | setops(argp, "showmatch ", i, "ic", VI_SHOWMATCH); |
1051 | /* tabstopXXXX */ |
1052 | if (strncmp(argp + i, "tabstop=%d ", 7) == 0) { |
1053 | sscanf(strchr(argp + i, '='), "tabstop=%d" + 7, &ch); |
1054 | if (ch > 0 && ch <= MAX_TABSTOP) |
1055 | tabstop = ch; |
1056 | } |
1057 | while (*argp && *argp != ' ') |
1058 | argp++; // skip to arg delimiter (i.e. blank) |
1059 | while (*argp && *argp == ' ') |
1060 | argp++; // skip all delimiting blanks |
1061 | } |
1062 | #endif /* FEATURE_VI_SETOPTS */ |
1063 | #endif /* FEATURE_VI_SET */ |
1064 | #if ENABLE_FEATURE_VI_SEARCH |
1065 | } else if (cmd[0] == 's') { // substitute a pattern with a replacement pattern |
1066 | char *ls, *F, *R; |
1067 | int gflag; |
1068 | |
1069 | // F points to the "find" pattern |
1070 | // R points to the "replace" pattern |
1071 | // replace the cmd line delimiters "/" with NULLs |
1072 | gflag = 0; // global replace flag |
1073 | c = orig_buf[1]; // what is the delimiter |
1074 | F = orig_buf + 2; // start of "find" |
1075 | R = strchr(F, c); // middle delimiter |
1076 | if (!R) |
1077 | goto colon_s_fail; |
1078 | *R++ = '\0'; // terminate "find" |
1079 | buf1 = strchr(R, c); |
1080 | if (!buf1) |
1081 | goto colon_s_fail; |
1082 | *buf1++ = '\0'; // terminate "replace" |
1083 | if (*buf1 == 'g') { // :s/foo/bar/g |
1084 | buf1++; |
1085 | gflag++; // turn on gflag |
1086 | } |
1087 | q = begin_line(q); |
1088 | if (b < 0) { // maybe :s/foo/bar/ |
1089 | q = begin_line(dot); // start with cur line |
1090 | b = count_lines(text, q); // cur line number |
1091 | } |
1092 | if (e < 0) |
1093 | e = b; // maybe :.s/foo/bar/ |
1094 | for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0 |
1095 | ls = q; // orig line start |
1096 | vc4: |
1097 | buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find" |
1098 | if (buf1) { |
1099 | uintptr_t bias; |
1100 | // we found the "find" pattern - delete it |
1101 | text_hole_delete(buf1, buf1 + strlen(F) - 1); |
1102 | // inset the "replace" patern |
1103 | bias = string_insert(buf1, R); // insert the string |
1104 | buf1 += bias; |
1105 | ls += bias; |
1106 | /*q += bias; - recalculated anyway */ |
1107 | // check for "global" :s/foo/bar/g |
1108 | if (gflag == 1) { |
1109 | if ((buf1 + strlen(R)) < end_line(ls)) { |
1110 | q = buf1 + strlen(R); |
1111 | goto vc4; // don't let q move past cur line |
1112 | } |
1113 | } |
1114 | } |
1115 | q = next_line(ls); |
1116 | } |
1117 | #endif /* FEATURE_VI_SEARCH */ |
1118 | } else if (strncmp(cmd, "version", i) == 0) { // show software version |
1119 | status_line(BB_VER " " BB_BT); |
1120 | } else if (strncmp(cmd, "write", i) == 0 // write text to file |
1121 | || strncmp(cmd, "wq", i) == 0 |
1122 | || strncmp(cmd, "wn", i) == 0 |
1123 | || (cmd[0] == 'x' && !cmd[1]) |
1124 | ) { |
1125 | // is there a file name to write to? |
1126 | if (args[0]) { |
1127 | fn = args; |
1128 | } |
1129 | #if ENABLE_FEATURE_VI_READONLY |
1130 | if (readonly_mode && !useforce) { |
1131 | status_line_bold("\"%s\" File is read only", fn); |
1132 | goto vc3; |
1133 | } |
1134 | #endif |
1135 | // how many lines in text[]? |
1136 | li = count_lines(q, r); |
1137 | ch = r - q + 1; |
1138 | // see if file exists- if not, its just a new file request |
1139 | if (useforce) { |
1140 | // if "fn" is not write-able, chmod u+w |
1141 | // sprintf(syscmd, "chmod u+w %s", fn); |
1142 | // system(syscmd); |
1143 | forced = TRUE; |
1144 | } |
1145 | l = file_write(fn, q, r); |
1146 | if (useforce && forced) { |
1147 | // chmod u-w |
1148 | // sprintf(syscmd, "chmod u-w %s", fn); |
1149 | // system(syscmd); |
1150 | forced = FALSE; |
1151 | } |
1152 | if (l < 0) { |
1153 | if (l == -1) |
1154 | status_line_bold("\"%s\" %s", fn, strerror(errno)); |
1155 | } else { |
1156 | status_line("\"%s\" %dL, %dC", fn, li, l); |
1157 | if (q == text && r == end - 1 && l == ch) { |
1158 | file_modified = 0; |
1159 | last_file_modified = -1; |
1160 | } |
1161 | if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n' || |
1162 | cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N') |
1163 | && l == ch) { |
1164 | editing = 0; |
1165 | } |
1166 | } |
1167 | #if ENABLE_FEATURE_VI_READONLY |
1168 | vc3:; |
1169 | #endif |
1170 | #if ENABLE_FEATURE_VI_YANKMARK |
1171 | } else if (strncmp(cmd, "yank", i) == 0) { // yank lines |
1172 | if (b < 0) { // no addr given- use defaults |
1173 | q = begin_line(dot); // assume .,. for the range |
1174 | r = end_line(dot); |
1175 | } |
1176 | text_yank(q, r, YDreg); |
1177 | li = count_lines(q, r); |
1178 | status_line("Yank %d lines (%d chars) into [%c]", |
1179 | li, strlen(reg[YDreg]), what_reg()); |
1180 | #endif |
1181 | } else { |
1182 | // cmd unknown |
1183 | not_implemented(cmd); |
1184 | } |
1185 | vc1: |
1186 | dot = bound_dot(dot); // make sure "dot" is valid |
1187 | return; |
1188 | #if ENABLE_FEATURE_VI_SEARCH |
1189 | colon_s_fail: |
1190 | status_line(":s expression missing delimiters"); |
1191 | #endif |
1192 | } |
1193 | |
1194 | #endif /* FEATURE_VI_COLON */ |
1195 | |
1196 | static void Hit_Return(void) |
1197 | { |
1198 | int c; |
1199 | |
1200 | standout_start(); |
1201 | write1("[Hit return to continue]"); |
1202 | standout_end(); |
1203 | while ((c = get_one_char()) != '\n' && c != '\r') |
1204 | continue; |
1205 | redraw(TRUE); // force redraw all |
1206 | } |
1207 | |
1208 | static int next_tabstop(int col) |
1209 | { |
1210 | return col + ((tabstop - 1) - (col % tabstop)); |
1211 | } |
1212 | |
1213 | //----- Synchronize the cursor to Dot -------------------------- |
1214 | static NOINLINE void sync_cursor(char *d, int *row, int *col) |
1215 | { |
1216 | char *beg_cur; // begin and end of "d" line |
1217 | char *tp; |
1218 | int cnt, ro, co; |
1219 | |
1220 | beg_cur = begin_line(d); // first char of cur line |
1221 | |
1222 | if (beg_cur < screenbegin) { |
1223 | // "d" is before top line on screen |
1224 | // how many lines do we have to move |
1225 | cnt = count_lines(beg_cur, screenbegin); |
1226 | sc1: |
1227 | screenbegin = beg_cur; |
1228 | if (cnt > (rows - 1) / 2) { |
1229 | // we moved too many lines. put "dot" in middle of screen |
1230 | for (cnt = 0; cnt < (rows - 1) / 2; cnt++) { |
1231 | screenbegin = prev_line(screenbegin); |
1232 | } |
1233 | } |
1234 | } else { |
1235 | char *end_scr; // begin and end of screen |
1236 | end_scr = end_screen(); // last char of screen |
1237 | if (beg_cur > end_scr) { |
1238 | // "d" is after bottom line on screen |
1239 | // how many lines do we have to move |
1240 | cnt = count_lines(end_scr, beg_cur); |
1241 | if (cnt > (rows - 1) / 2) |
1242 | goto sc1; // too many lines |
1243 | for (ro = 0; ro < cnt - 1; ro++) { |
1244 | // move screen begin the same amount |
1245 | screenbegin = next_line(screenbegin); |
1246 | // now, move the end of screen |
1247 | end_scr = next_line(end_scr); |
1248 | end_scr = end_line(end_scr); |
1249 | } |
1250 | } |
1251 | } |
1252 | // "d" is on screen- find out which row |
1253 | tp = screenbegin; |
1254 | for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row |
1255 | if (tp == beg_cur) |
1256 | break; |
1257 | tp = next_line(tp); |
1258 | } |
1259 | |
1260 | // find out what col "d" is on |
1261 | co = 0; |
1262 | while (tp < d) { // drive "co" to correct column |
1263 | if (*tp == '\n') //vda || *tp == '\0') |
1264 | break; |
1265 | if (*tp == '\t') { |
1266 | // handle tabs like real vi |
1267 | if (d == tp && cmd_mode) { |
1268 | break; |
1269 | } |
1270 | co = next_tabstop(co); |
1271 | } else if ((unsigned char)*tp < ' ' || *tp == 0x7f) { |
1272 | co++; // display as ^X, use 2 columns |
1273 | } |
1274 | co++; |
1275 | tp++; |
1276 | } |
1277 | |
1278 | // "co" is the column where "dot" is. |
1279 | // The screen has "columns" columns. |
1280 | // The currently displayed columns are 0+offset -- columns+ofset |
1281 | // |-------------------------------------------------------------| |
1282 | // ^ ^ ^ |
1283 | // offset | |------- columns ----------------| |
1284 | // |
1285 | // If "co" is already in this range then we do not have to adjust offset |
1286 | // but, we do have to subtract the "offset" bias from "co". |
1287 | // If "co" is outside this range then we have to change "offset". |
1288 | // If the first char of a line is a tab the cursor will try to stay |
1289 | // in column 7, but we have to set offset to 0. |
1290 | |
1291 | if (co < 0 + offset) { |
1292 | offset = co; |
1293 | } |
1294 | if (co >= columns + offset) { |
1295 | offset = co - columns + 1; |
1296 | } |
1297 | // if the first char of the line is a tab, and "dot" is sitting on it |
1298 | // force offset to 0. |
1299 | if (d == beg_cur && *d == '\t') { |
1300 | offset = 0; |
1301 | } |
1302 | co -= offset; |
1303 | |
1304 | *row = ro; |
1305 | *col = co; |
1306 | } |
1307 | |
1308 | //----- Text Movement Routines --------------------------------- |
1309 | static char *begin_line(char *p) // return pointer to first char cur line |
1310 | { |
1311 | if (p > text) { |
1312 | p = memrchr(text, '\n', p - text); |
1313 | if (!p) |
1314 | return text; |
1315 | return p + 1; |
1316 | } |
1317 | return p; |
1318 | } |
1319 | |
1320 | static char *end_line(char *p) // return pointer to NL of cur line |
1321 | { |
1322 | if (p < end - 1) { |
1323 | p = memchr(p, '\n', end - p - 1); |
1324 | if (!p) |
1325 | return end - 1; |
1326 | } |
1327 | return p; |
1328 | } |
1329 | |
1330 | static char *dollar_line(char *p) // return pointer to just before NL line |
1331 | { |
1332 | p = end_line(p); |
1333 | // Try to stay off of the Newline |
1334 | if (*p == '\n' && (p - begin_line(p)) > 0) |
1335 | p--; |
1336 | return p; |
1337 | } |
1338 | |
1339 | static char *prev_line(char *p) // return pointer first char prev line |
1340 | { |
1341 | p = begin_line(p); // goto begining of cur line |
1342 | if (p > text && p[-1] == '\n') |
1343 | p--; // step to prev line |
1344 | p = begin_line(p); // goto begining of prev line |
1345 | return p; |
1346 | } |
1347 | |
1348 | static char *next_line(char *p) // return pointer first char next line |
1349 | { |
1350 | p = end_line(p); |
1351 | if (p < end - 1 && *p == '\n') |
1352 | p++; // step to next line |
1353 | return p; |
1354 | } |
1355 | |
1356 | //----- Text Information Routines ------------------------------ |
1357 | static char *end_screen(void) |
1358 | { |
1359 | char *q; |
1360 | int cnt; |
1361 | |
1362 | // find new bottom line |
1363 | q = screenbegin; |
1364 | for (cnt = 0; cnt < rows - 2; cnt++) |
1365 | q = next_line(q); |
1366 | q = end_line(q); |
1367 | return q; |
1368 | } |
1369 | |
1370 | // count line from start to stop |
1371 | static int count_lines(char *start, char *stop) |
1372 | { |
1373 | char *q; |
1374 | int cnt; |
1375 | |
1376 | if (stop < start) { // start and stop are backwards- reverse them |
1377 | q = start; |
1378 | start = stop; |
1379 | stop = q; |
1380 | } |
1381 | cnt = 0; |
1382 | stop = end_line(stop); |
1383 | while (start <= stop && start <= end - 1) { |
1384 | start = end_line(start); |
1385 | if (*start == '\n') |
1386 | cnt++; |
1387 | start++; |
1388 | } |
1389 | return cnt; |
1390 | } |
1391 | |
1392 | static char *find_line(int li) // find begining of line #li |
1393 | { |
1394 | char *q; |
1395 | |
1396 | for (q = text; li > 1; li--) { |
1397 | q = next_line(q); |
1398 | } |
1399 | return q; |
1400 | } |
1401 | |
1402 | //----- Dot Movement Routines ---------------------------------- |
1403 | static void dot_left(void) |
1404 | { |
1405 | if (dot > text && dot[-1] != '\n') |
1406 | dot--; |
1407 | } |
1408 | |
1409 | static void dot_right(void) |
1410 | { |
1411 | if (dot < end - 1 && *dot != '\n') |
1412 | dot++; |
1413 | } |
1414 | |
1415 | static void dot_begin(void) |
1416 | { |
1417 | dot = begin_line(dot); // return pointer to first char cur line |
1418 | } |
1419 | |
1420 | static void dot_end(void) |
1421 | { |
1422 | dot = end_line(dot); // return pointer to last char cur line |
1423 | } |
1424 | |
1425 | static char *move_to_col(char *p, int l) |
1426 | { |
1427 | int co; |
1428 | |
1429 | p = begin_line(p); |
1430 | co = 0; |
1431 | while (co < l && p < end) { |
1432 | if (*p == '\n') //vda || *p == '\0') |
1433 | break; |
1434 | if (*p == '\t') { |
1435 | co = next_tabstop(co); |
1436 | } else if (*p < ' ' || *p == 127) { |
1437 | co++; // display as ^X, use 2 columns |
1438 | } |
1439 | co++; |
1440 | p++; |
1441 | } |
1442 | return p; |
1443 | } |
1444 | |
1445 | static void dot_next(void) |
1446 | { |
1447 | dot = next_line(dot); |
1448 | } |
1449 | |
1450 | static void dot_prev(void) |
1451 | { |
1452 | dot = prev_line(dot); |
1453 | } |
1454 | |
1455 | static void dot_scroll(int cnt, int dir) |
1456 | { |
1457 | char *q; |
1458 | |
1459 | for (; cnt > 0; cnt--) { |
1460 | if (dir < 0) { |
1461 | // scroll Backwards |
1462 | // ctrl-Y scroll up one line |
1463 | screenbegin = prev_line(screenbegin); |
1464 | } else { |
1465 | // scroll Forwards |
1466 | // ctrl-E scroll down one line |
1467 | screenbegin = next_line(screenbegin); |
1468 | } |
1469 | } |
1470 | // make sure "dot" stays on the screen so we dont scroll off |
1471 | if (dot < screenbegin) |
1472 | dot = screenbegin; |
1473 | q = end_screen(); // find new bottom line |
1474 | if (dot > q) |
1475 | dot = begin_line(q); // is dot is below bottom line? |
1476 | dot_skip_over_ws(); |
1477 | } |
1478 | |
1479 | static void dot_skip_over_ws(void) |
1480 | { |
1481 | // skip WS |
1482 | while (isspace(*dot) && *dot != '\n' && dot < end - 1) |
1483 | dot++; |
1484 | } |
1485 | |
1486 | static void dot_delete(void) // delete the char at 'dot' |
1487 | { |
1488 | text_hole_delete(dot, dot); |
1489 | } |
1490 | |
1491 | static char *bound_dot(char *p) // make sure text[0] <= P < "end" |
1492 | { |
1493 | if (p >= end && end > text) { |
1494 | p = end - 1; |
1495 | indicate_error('1'); |
1496 | } |
1497 | if (p < text) { |
1498 | p = text; |
1499 | indicate_error('2'); |
1500 | } |
1501 | return p; |
1502 | } |
1503 | |
1504 | //----- Helper Utility Routines -------------------------------- |
1505 | |
1506 | //---------------------------------------------------------------- |
1507 | //----- Char Routines -------------------------------------------- |
1508 | /* Chars that are part of a word- |
1509 | * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz |
1510 | * Chars that are Not part of a word (stoppers) |
1511 | * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~ |
1512 | * Chars that are WhiteSpace |
1513 | * TAB NEWLINE VT FF RETURN SPACE |
1514 | * DO NOT COUNT NEWLINE AS WHITESPACE |
1515 | */ |
1516 | |
1517 | static char *new_screen(int ro, int co) |
1518 | { |
1519 | int li; |
1520 | |
1521 | free(screen); |
1522 | screensize = ro * co + 8; |
1523 | screen = xmalloc(screensize); |
1524 | // initialize the new screen. assume this will be a empty file. |
1525 | screen_erase(); |
1526 | // non-existent text[] lines start with a tilde (~). |
1527 | for (li = 1; li < ro - 1; li++) { |
1528 | screen[(li * co) + 0] = '~'; |
1529 | } |
1530 | return screen; |
1531 | } |
1532 | |
1533 | #if ENABLE_FEATURE_VI_SEARCH |
1534 | static int mycmp(const char *s1, const char *s2, int len) |
1535 | { |
1536 | if (ENABLE_FEATURE_VI_SETOPTS && ignorecase) { |
1537 | return strncasecmp(s1, s2, len); |
1538 | } |
1539 | return strncmp(s1, s2, len); |
1540 | } |
1541 | |
1542 | // search for pattern starting at p |
1543 | static char *char_search(char *p, const char *pat, int dir, int range) |
1544 | { |
1545 | #ifndef REGEX_SEARCH |
1546 | char *start, *stop; |
1547 | int len; |
1548 | |
1549 | len = strlen(pat); |
1550 | if (dir == FORWARD) { |
1551 | stop = end - 1; // assume range is p - end-1 |
1552 | if (range == LIMITED) |
1553 | stop = next_line(p); // range is to next line |
1554 | for (start = p; start < stop; start++) { |
1555 | if (mycmp(start, pat, len) == 0) { |
1556 | return start; |
1557 | } |
1558 | } |
1559 | } else if (dir == BACK) { |
1560 | stop = text; // assume range is text - p |
1561 | if (range == LIMITED) |
1562 | stop = prev_line(p); // range is to prev line |
1563 | for (start = p - len; start >= stop; start--) { |
1564 | if (mycmp(start, pat, len) == 0) { |
1565 | return start; |
1566 | } |
1567 | } |
1568 | } |
1569 | // pattern not found |
1570 | return NULL; |
1571 | #else /* REGEX_SEARCH */ |
1572 | char *q; |
1573 | struct re_pattern_buffer preg; |
1574 | int i; |
1575 | int size, range; |
1576 | |
1577 | re_syntax_options = RE_SYNTAX_POSIX_EXTENDED; |
1578 | preg.translate = 0; |
1579 | preg.fastmap = 0; |
1580 | preg.buffer = 0; |
1581 | preg.allocated = 0; |
1582 | |
1583 | // assume a LIMITED forward search |
1584 | q = next_line(p); |
1585 | q = end_line(q); |
1586 | q = end - 1; |
1587 | if (dir == BACK) { |
1588 | q = prev_line(p); |
1589 | q = text; |
1590 | } |
1591 | // count the number of chars to search over, forward or backward |
1592 | size = q - p; |
1593 | if (size < 0) |
1594 | size = p - q; |
1595 | // RANGE could be negative if we are searching backwards |
1596 | range = q - p; |
1597 | |
1598 | q = re_compile_pattern(pat, strlen(pat), &preg); |
1599 | if (q != 0) { |
1600 | // The pattern was not compiled |
1601 | status_line_bold("bad search pattern: \"%s\": %s", pat, q); |
1602 | i = 0; // return p if pattern not compiled |
1603 | goto cs1; |
1604 | } |
1605 | |
1606 | q = p; |
1607 | if (range < 0) { |
1608 | q = p - size; |
1609 | if (q < text) |
1610 | q = text; |
1611 | } |
1612 | // search for the compiled pattern, preg, in p[] |
1613 | // range < 0- search backward |
1614 | // range > 0- search forward |
1615 | // 0 < start < size |
1616 | // re_search() < 0 not found or error |
1617 | // re_search() > 0 index of found pattern |
1618 | // struct pattern char int int int struct reg |
1619 | // re_search (*pattern_buffer, *string, size, start, range, *regs) |
1620 | i = re_search(&preg, q, size, 0, range, 0); |
1621 | if (i == -1) { |
1622 | p = 0; |
1623 | i = 0; // return NULL if pattern not found |
1624 | } |
1625 | cs1: |
1626 | if (dir == FORWARD) { |
1627 | p = p + i; |
1628 | } else { |
1629 | p = p - i; |
1630 | } |
1631 | return p; |
1632 | #endif /* REGEX_SEARCH */ |
1633 | } |
1634 | #endif /* FEATURE_VI_SEARCH */ |
1635 | |
1636 | static char *char_insert(char *p, char c) // insert the char c at 'p' |
1637 | { |
1638 | if (c == 22) { // Is this an ctrl-V? |
1639 | p += stupid_insert(p, '^'); // use ^ to indicate literal next |
1640 | refresh(FALSE); // show the ^ |
1641 | c = get_one_char(); |
1642 | *p = c; |
1643 | p++; |
1644 | file_modified++; |
1645 | } else if (c == 27) { // Is this an ESC? |
1646 | cmd_mode = 0; |
1647 | cmdcnt = 0; |
1648 | end_cmd_q(); // stop adding to q |
1649 | last_status_cksum = 0; // force status update |
1650 | if ((p[-1] != '\n') && (dot > text)) { |
1651 | p--; |
1652 | } |
1653 | } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS |
1654 | // 123456789 |
1655 | if ((p[-1] != '\n') && (dot>text)) { |
1656 | p--; |
1657 | p = text_hole_delete(p, p); // shrink buffer 1 char |
1658 | } |
1659 | } else { |
1660 | // insert a char into text[] |
1661 | char *sp; // "save p" |
1662 | |
1663 | if (c == 13) |
1664 | c = '\n'; // translate \r to \n |
1665 | sp = p; // remember addr of insert |
1666 | p += 1 + stupid_insert(p, c); // insert the char |
1667 | #if ENABLE_FEATURE_VI_SETOPTS |
1668 | if (showmatch && strchr(")]}", *sp) != NULL) { |
1669 | showmatching(sp); |
1670 | } |
1671 | if (autoindent && c == '\n') { // auto indent the new line |
1672 | char *q; |
1673 | size_t len; |
1674 | q = prev_line(p); // use prev line as template |
1675 | len = strspn(q, " \t"); // space or tab |
1676 | if (len) { |
1677 | uintptr_t bias; |
1678 | bias = text_hole_make(p, len); |
1679 | p += bias; |
1680 | q += bias; |
1681 | memcpy(p, q, len); |
1682 | p += len; |
1683 | } |
1684 | } |
1685 | #endif |
1686 | } |
1687 | return p; |
1688 | } |
1689 | |
1690 | // might reallocate text[]! use p += stupid_insert(p, ...), |
1691 | // and be careful to not use pointers into potentially freed text[]! |
1692 | static uintptr_t stupid_insert(char *p, char c) // stupidly insert the char c at 'p' |
1693 | { |
1694 | uintptr_t bias; |
1695 | bias = text_hole_make(p, 1); |
1696 | p += bias; |
1697 | *p = c; |
1698 | //file_modified++; - done by text_hole_make() |
1699 | return bias; |
1700 | } |
1701 | |
1702 | static int find_range(char **start, char **stop, char c) |
1703 | { |
1704 | char *save_dot, *p, *q, *t; |
1705 | int cnt, multiline = 0; |
1706 | |
1707 | save_dot = dot; |
1708 | p = q = dot; |
1709 | |
1710 | if (strchr("cdy><", c)) { |
1711 | // these cmds operate on whole lines |
1712 | p = q = begin_line(p); |
1713 | for (cnt = 1; cnt < cmdcnt; cnt++) { |
1714 | q = next_line(q); |
1715 | } |
1716 | q = end_line(q); |
1717 | } else if (strchr("^%$0bBeEfth\b\177", c)) { |
1718 | // These cmds operate on char positions |
1719 | do_cmd(c); // execute movement cmd |
1720 | q = dot; |
1721 | } else if (strchr("wW", c)) { |
1722 | do_cmd(c); // execute movement cmd |
1723 | // if we are at the next word's first char |
1724 | // step back one char |
1725 | // but check the possibilities when it is true |
1726 | if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0])) |
1727 | || (ispunct(dot[-1]) && !ispunct(dot[0])) |
1728 | || (isalnum(dot[-1]) && !isalnum(dot[0])))) |
1729 | dot--; // move back off of next word |
1730 | if (dot > text && *dot == '\n') |
1731 | dot--; // stay off NL |
1732 | q = dot; |
1733 | } else if (strchr("H-k{", c)) { |
1734 | // these operate on multi-lines backwards |
1735 | q = end_line(dot); // find NL |
1736 | do_cmd(c); // execute movement cmd |
1737 | dot_begin(); |
1738 | p = dot; |
1739 | } else if (strchr("L+j}\r\n", c)) { |
1740 | // these operate on multi-lines forwards |
1741 | p = begin_line(dot); |
1742 | do_cmd(c); // execute movement cmd |
1743 | dot_end(); // find NL |
1744 | q = dot; |
1745 | } else { |
1746 | // nothing -- this causes any other values of c to |
1747 | // represent the one-character range under the |
1748 | // cursor. this is correct for ' ' and 'l', but |
1749 | // perhaps no others. |
1750 | // |
1751 | } |
1752 | if (q < p) { |
1753 | t = q; |
1754 | q = p; |
1755 | p = t; |
1756 | } |
1757 | |
1758 | // backward char movements don't include start position |
1759 | if (q > p && strchr("^0bBh\b\177", c)) q--; |
1760 | |
1761 | multiline = 0; |
1762 | for (t = p; t <= q; t++) { |
1763 | if (*t == '\n') { |
1764 | multiline = 1; |
1765 | break; |
1766 | } |
1767 | } |
1768 | |
1769 | *start = p; |
1770 | *stop = q; |
1771 | dot = save_dot; |
1772 | return multiline; |
1773 | } |
1774 | |
1775 | static int st_test(char *p, int type, int dir, char *tested) |
1776 | { |
1777 | char c, c0, ci; |
1778 | int test, inc; |
1779 | |
1780 | inc = dir; |
1781 | c = c0 = p[0]; |
1782 | ci = p[inc]; |
1783 | test = 0; |
1784 | |
1785 | if (type == S_BEFORE_WS) { |
1786 | c = ci; |
1787 | test = (!isspace(c) || c == '\n'); |
1788 | } |
1789 | if (type == S_TO_WS) { |
1790 | c = c0; |
1791 | test = (!isspace(c) || c == '\n'); |
1792 | } |
1793 | if (type == S_OVER_WS) { |
1794 | c = c0; |
1795 | test = isspace(c); |
1796 | } |
1797 | if (type == S_END_PUNCT) { |
1798 | c = ci; |
1799 | test = ispunct(c); |
1800 | } |
1801 | if (type == S_END_ALNUM) { |
1802 | c = ci; |
1803 | test = (isalnum(c) || c == '_'); |
1804 | } |
1805 | *tested = c; |
1806 | return test; |
1807 | } |
1808 | |
1809 | static char *skip_thing(char *p, int linecnt, int dir, int type) |
1810 | { |
1811 | char c; |
1812 | |
1813 | while (st_test(p, type, dir, &c)) { |
1814 | // make sure we limit search to correct number of lines |
1815 | if (c == '\n' && --linecnt < 1) |
1816 | break; |
1817 | if (dir >= 0 && p >= end - 1) |
1818 | break; |
1819 | if (dir < 0 && p <= text) |
1820 | break; |
1821 | p += dir; // move to next char |
1822 | } |
1823 | return p; |
1824 | } |
1825 | |
1826 | // find matching char of pair () [] {} |
1827 | static char *find_pair(char *p, const char c) |
1828 | { |
1829 | char match, *q; |
1830 | int dir, level; |
1831 | |
1832 | match = ')'; |
1833 | level = 1; |
1834 | dir = 1; // assume forward |
1835 | switch (c) { |
1836 | case '(': match = ')'; break; |
1837 | case '[': match = ']'; break; |
1838 | case '{': match = '}'; break; |
1839 | case ')': match = '('; dir = -1; break; |
1840 | case ']': match = '['; dir = -1; break; |
1841 | case '}': match = '{'; dir = -1; break; |
1842 | } |
1843 | for (q = p + dir; text <= q && q < end; q += dir) { |
1844 | // look for match, count levels of pairs (( )) |
1845 | if (*q == c) |
1846 | level++; // increase pair levels |
1847 | if (*q == match) |
1848 | level--; // reduce pair level |
1849 | if (level == 0) |
1850 | break; // found matching pair |
1851 | } |
1852 | if (level != 0) |
1853 | q = NULL; // indicate no match |
1854 | return q; |
1855 | } |
1856 | |
1857 | #if ENABLE_FEATURE_VI_SETOPTS |
1858 | // show the matching char of a pair, () [] {} |
1859 | static void showmatching(char *p) |
1860 | { |
1861 | char *q, *save_dot; |
1862 | |
1863 | // we found half of a pair |
1864 | q = find_pair(p, *p); // get loc of matching char |
1865 | if (q == NULL) { |
1866 | indicate_error('3'); // no matching char |
1867 | } else { |
1868 | // "q" now points to matching pair |
1869 | save_dot = dot; // remember where we are |
1870 | dot = q; // go to new loc |
1871 | refresh(FALSE); // let the user see it |
1872 | mysleep(40); // give user some time |
1873 | dot = save_dot; // go back to old loc |
1874 | refresh(FALSE); |
1875 | } |
1876 | } |
1877 | #endif /* FEATURE_VI_SETOPTS */ |
1878 | |
1879 | // open a hole in text[] |
1880 | // might reallocate text[]! use p += text_hole_make(p, ...), |
1881 | // and be careful to not use pointers into potentially freed text[]! |
1882 | static uintptr_t text_hole_make(char *p, int size) // at "p", make a 'size' byte hole |
1883 | { |
1884 | uintptr_t bias = 0; |
1885 | |
1886 | if (size <= 0) |
1887 | return bias; |
1888 | end += size; // adjust the new END |
1889 | if (end >= (text + text_size)) { |
1890 | char *new_text; |
1891 | text_size += end - (text + text_size) + 10240; |
1892 | new_text = xrealloc(text, text_size); |
1893 | bias = (new_text - text); |
1894 | screenbegin += bias; |
1895 | dot += bias; |
1896 | end += bias; |
1897 | p += bias; |
1898 | text = new_text; |
1899 | } |
1900 | memmove(p + size, p, end - size - p); |
1901 | memset(p, ' ', size); // clear new hole |
1902 | file_modified++; |
1903 | return bias; |
1904 | } |
1905 | |
1906 | // close a hole in text[] |
1907 | static char *text_hole_delete(char *p, char *q) // delete "p" through "q", inclusive |
1908 | { |
1909 | char *src, *dest; |
1910 | int cnt, hole_size; |
1911 | |
1912 | // move forwards, from beginning |
1913 | // assume p <= q |
1914 | src = q + 1; |
1915 | dest = p; |
1916 | if (q < p) { // they are backward- swap them |
1917 | src = p + 1; |
1918 | dest = q; |
1919 | } |
1920 | hole_size = q - p + 1; |
1921 | cnt = end - src; |
1922 | if (src < text || src > end) |
1923 | goto thd0; |
1924 | if (dest < text || dest >= end) |
1925 | goto thd0; |
1926 | if (src >= end) |
1927 | goto thd_atend; // just delete the end of the buffer |
1928 | memmove(dest, src, cnt); |
1929 | thd_atend: |
1930 | end = end - hole_size; // adjust the new END |
1931 | if (dest >= end) |
1932 | dest = end - 1; // make sure dest in below end-1 |
1933 | if (end <= text) |
1934 | dest = end = text; // keep pointers valid |
1935 | file_modified++; |
1936 | thd0: |
1937 | return dest; |
1938 | } |
1939 | |
1940 | // copy text into register, then delete text. |
1941 | // if dist <= 0, do not include, or go past, a NewLine |
1942 | // |
1943 | static char *yank_delete(char *start, char *stop, int dist, int yf) |
1944 | { |
1945 | char *p; |
1946 | |
1947 | // make sure start <= stop |
1948 | if (start > stop) { |
1949 | // they are backwards, reverse them |
1950 | p = start; |
1951 | start = stop; |
1952 | stop = p; |
1953 | } |
1954 | if (dist <= 0) { |
1955 | // we cannot cross NL boundaries |
1956 | p = start; |
1957 | if (*p == '\n') |
1958 | return p; |
1959 | // dont go past a NewLine |
1960 | for (; p + 1 <= stop; p++) { |
1961 | if (p[1] == '\n') { |
1962 | stop = p; // "stop" just before NewLine |
1963 | break; |
1964 | } |
1965 | } |
1966 | } |
1967 | p = start; |
1968 | #if ENABLE_FEATURE_VI_YANKMARK |
1969 | text_yank(start, stop, YDreg); |
1970 | #endif |
1971 | if (yf == YANKDEL) { |
1972 | p = text_hole_delete(start, stop); |
1973 | } // delete lines |
1974 | return p; |
1975 | } |
1976 | |
1977 | static void show_help(void) |
1978 | { |
1979 | puts("These features are available:" |
1980 | #if ENABLE_FEATURE_VI_SEARCH |
1981 | "\n\tPattern searches with / and ?" |
1982 | #endif |
1983 | #if ENABLE_FEATURE_VI_DOT_CMD |
1984 | "\n\tLast command repeat with \'.\'" |
1985 | #endif |
1986 | #if ENABLE_FEATURE_VI_YANKMARK |
1987 | "\n\tLine marking with 'x" |
1988 | "\n\tNamed buffers with \"x" |
1989 | #endif |
1990 | #if ENABLE_FEATURE_VI_READONLY |
1991 | "\n\tReadonly if vi is called as \"view\"" |
1992 | "\n\tReadonly with -R command line arg" |
1993 | #endif |
1994 | #if ENABLE_FEATURE_VI_SET |
1995 | "\n\tSome colon mode commands with \':\'" |
1996 | #endif |
1997 | #if ENABLE_FEATURE_VI_SETOPTS |
1998 | "\n\tSettable options with \":set\"" |
1999 | #endif |
2000 | #if ENABLE_FEATURE_VI_USE_SIGNALS |
2001 | "\n\tSignal catching- ^C" |
2002 | "\n\tJob suspend and resume with ^Z" |
2003 | #endif |
2004 | #if ENABLE_FEATURE_VI_WIN_RESIZE |
2005 | "\n\tAdapt to window re-sizes" |
2006 | #endif |
2007 | ); |
2008 | } |
2009 | |
2010 | #if ENABLE_FEATURE_VI_DOT_CMD |
2011 | static void start_new_cmd_q(char c) |
2012 | { |
2013 | // get buffer for new cmd |
2014 | // if there is a current cmd count put it in the buffer first |
2015 | if (cmdcnt > 0) { |
2016 | lmc_len = sprintf(last_modifying_cmd, "%d%c", cmdcnt, c); |
2017 | } else { // just save char c onto queue |
2018 | last_modifying_cmd[0] = c; |
2019 | lmc_len = 1; |
2020 | } |
2021 | adding2q = 1; |
2022 | } |
2023 | |
2024 | static void end_cmd_q(void) |
2025 | { |
2026 | #if ENABLE_FEATURE_VI_YANKMARK |
2027 | YDreg = 26; // go back to default Yank/Delete reg |
2028 | #endif |
2029 | adding2q = 0; |
2030 | } |
2031 | #endif /* FEATURE_VI_DOT_CMD */ |
2032 | |
2033 | #if ENABLE_FEATURE_VI_YANKMARK \ |
2034 | || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \ |
2035 | || ENABLE_FEATURE_VI_CRASHME |
2036 | // might reallocate text[]! use p += string_insert(p, ...), |
2037 | // and be careful to not use pointers into potentially freed text[]! |
2038 | static uintptr_t string_insert(char *p, const char *s) // insert the string at 'p' |
2039 | { |
2040 | uintptr_t bias; |
2041 | int i; |
2042 | |
2043 | i = strlen(s); |
2044 | bias = text_hole_make(p, i); |
2045 | p += bias; |
2046 | memcpy(p, s, i); |
2047 | #if ENABLE_FEATURE_VI_YANKMARK |
2048 | { |
2049 | int cnt; |
2050 | for (cnt = 0; *s != '\0'; s++) { |
2051 | if (*s == '\n') |
2052 | cnt++; |
2053 | } |
2054 | status_line("Put %d lines (%d chars) from [%c]", cnt, i, what_reg()); |
2055 | } |
2056 | #endif |
2057 | return bias; |
2058 | } |
2059 | #endif |
2060 | |
2061 | #if ENABLE_FEATURE_VI_YANKMARK |
2062 | static char *text_yank(char *p, char *q, int dest) // copy text into a register |
2063 | { |
2064 | int cnt = q - p; |
2065 | if (cnt < 0) { // they are backwards- reverse them |
2066 | p = q; |
2067 | cnt = -cnt; |
2068 | } |
2069 | free(reg[dest]); // if already a yank register, free it |
2070 | reg[dest] = xstrndup(p, cnt + 1); |
2071 | return p; |
2072 | } |
2073 | |
2074 | static char what_reg(void) |
2075 | { |
2076 | char c; |
2077 | |
2078 | c = 'D'; // default to D-reg |
2079 | if (0 <= YDreg && YDreg <= 25) |
2080 | c = 'a' + (char) YDreg; |
2081 | if (YDreg == 26) |
2082 | c = 'D'; |
2083 | if (YDreg == 27) |
2084 | c = 'U'; |
2085 | return c; |
2086 | } |
2087 | |
2088 | static void check_context(char cmd) |
2089 | { |
2090 | // A context is defined to be "modifying text" |
2091 | // Any modifying command establishes a new context. |
2092 | |
2093 | if (dot < context_start || dot > context_end) { |
2094 | if (strchr(modifying_cmds, cmd) != NULL) { |
2095 | // we are trying to modify text[]- make this the current context |
2096 | mark[27] = mark[26]; // move cur to prev |
2097 | mark[26] = dot; // move local to cur |
2098 | context_start = prev_line(prev_line(dot)); |
2099 | context_end = next_line(next_line(dot)); |
2100 | //loiter= start_loiter= now; |
2101 | } |
2102 | } |
2103 | } |
2104 | |
2105 | static char *swap_context(char *p) // goto new context for '' command make this the current context |
2106 | { |
2107 | char *tmp; |
2108 | |
2109 | // the current context is in mark[26] |
2110 | // the previous context is in mark[27] |
2111 | // only swap context if other context is valid |
2112 | if (text <= mark[27] && mark[27] <= end - 1) { |
2113 | tmp = mark[27]; |
2114 | mark[27] = mark[26]; |
2115 | mark[26] = tmp; |
2116 | p = mark[26]; // where we are going- previous context |
2117 | context_start = prev_line(prev_line(prev_line(p))); |
2118 | context_end = next_line(next_line(next_line(p))); |
2119 | } |
2120 | return p; |
2121 | } |
2122 | #endif /* FEATURE_VI_YANKMARK */ |
2123 | |
2124 | //----- Set terminal attributes -------------------------------- |
2125 | static void rawmode(void) |
2126 | { |
2127 | tcgetattr(0, &term_orig); |
2128 | term_vi = term_orig; |
2129 | term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's |
2130 | term_vi.c_iflag &= (~IXON & ~ICRNL); |
2131 | term_vi.c_oflag &= (~ONLCR); |
2132 | term_vi.c_cc[VMIN] = 1; |
2133 | term_vi.c_cc[VTIME] = 0; |
2134 | erase_char = term_vi.c_cc[VERASE]; |
2135 | tcsetattr_stdin_TCSANOW(&term_vi); |
2136 | } |
2137 | |
2138 | static void cookmode(void) |
2139 | { |
2140 | fflush_all(); |
2141 | tcsetattr_stdin_TCSANOW(&term_orig); |
2142 | } |
2143 | |
2144 | //----- Come here when we get a window resize signal --------- |
2145 | #if ENABLE_FEATURE_VI_USE_SIGNALS |
2146 | static void winch_sig(int sig UNUSED_PARAM) |
2147 | { |
2148 | // FIXME: do it in main loop!!! |
2149 | signal(SIGWINCH, winch_sig); |
2150 | if (ENABLE_FEATURE_VI_WIN_RESIZE) { |
2151 | get_terminal_width_height(0, &columns, &rows); |
2152 | if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS; |
2153 | if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS; |
2154 | } |
2155 | new_screen(rows, columns); // get memory for virtual screen |
2156 | redraw(TRUE); // re-draw the screen |
2157 | } |
2158 | |
2159 | //----- Come here when we get a continue signal ------------------- |
2160 | static void cont_sig(int sig UNUSED_PARAM) |
2161 | { |
2162 | rawmode(); // terminal to "raw" |
2163 | last_status_cksum = 0; // force status update |
2164 | redraw(TRUE); // re-draw the screen |
2165 | |
2166 | signal(SIGTSTP, suspend_sig); |
2167 | signal(SIGCONT, SIG_DFL); |
2168 | kill(my_pid, SIGCONT); // huh? why? we are already "continued"... |
2169 | } |
2170 | |
2171 | //----- Come here when we get a Suspend signal ------------------- |
2172 | static void suspend_sig(int sig UNUSED_PARAM) |
2173 | { |
2174 | go_bottom_and_clear_to_eol(); |
2175 | cookmode(); // terminal to "cooked" |
2176 | |
2177 | signal(SIGCONT, cont_sig); |
2178 | signal(SIGTSTP, SIG_DFL); |
2179 | kill(my_pid, SIGTSTP); |
2180 | } |
2181 | |
2182 | //----- Come here when we get a signal --------------------------- |
2183 | static void catch_sig(int sig) |
2184 | { |
2185 | signal(SIGINT, catch_sig); |
2186 | if (sig) |
2187 | siglongjmp(restart, sig); |
2188 | } |
2189 | #endif /* FEATURE_VI_USE_SIGNALS */ |
2190 | |
2191 | static int mysleep(int hund) // sleep for 'hund' 1/100 seconds or stdin ready |
2192 | { |
2193 | struct pollfd pfd[1]; |
2194 | |
2195 | pfd[0].fd = STDIN_FILENO; |
2196 | pfd[0].events = POLLIN; |
2197 | return safe_poll(pfd, 1, hund*10) > 0; |
2198 | } |
2199 | |
2200 | //----- IO Routines -------------------------------------------- |
2201 | static int readit(void) // read (maybe cursor) key from stdin |
2202 | { |
2203 | int c; |
2204 | |
2205 | fflush_all(); |
2206 | c = read_key(STDIN_FILENO, readbuffer); |
2207 | if (c == -1) { // EOF/error |
2208 | go_bottom_and_clear_to_eol(); |
2209 | cookmode(); // terminal to "cooked" |
2210 | bb_error_msg_and_die("can't read user input"); |
2211 | } |
2212 | return c; |
2213 | } |
2214 | |
2215 | //----- IO Routines -------------------------------------------- |
2216 | static int get_one_char(void) |
2217 | { |
2218 | int c; |
2219 | |
2220 | #if ENABLE_FEATURE_VI_DOT_CMD |
2221 | if (!adding2q) { |
2222 | // we are not adding to the q. |
2223 | // but, we may be reading from a q |
2224 | if (ioq == 0) { |
2225 | // there is no current q, read from STDIN |
2226 | c = readit(); // get the users input |
2227 | } else { |
2228 | // there is a queue to get chars from first |
2229 | // careful with correct sign expansion! |
2230 | c = (unsigned char)*ioq++; |
2231 | if (c == '\0') { |
2232 | // the end of the q, read from STDIN |
2233 | free(ioq_start); |
2234 | ioq_start = ioq = 0; |
2235 | c = readit(); // get the users input |
2236 | } |
2237 | } |
2238 | } else { |
2239 | // adding STDIN chars to q |
2240 | c = readit(); // get the users input |
2241 | if (lmc_len >= MAX_INPUT_LEN - 1) { |
2242 | status_line_bold("last_modifying_cmd overrun"); |
2243 | } else { |
2244 | // add new char to q |
2245 | last_modifying_cmd[lmc_len++] = c; |
2246 | } |
2247 | } |
2248 | #else |
2249 | c = readit(); // get the users input |
2250 | #endif /* FEATURE_VI_DOT_CMD */ |
2251 | return c; |
2252 | } |
2253 | |
2254 | // Get input line (uses "status line" area) |
2255 | static char *get_input_line(const char *prompt) |
2256 | { |
2257 | // char [MAX_INPUT_LEN] |
2258 | #define buf get_input_line__buf |
2259 | |
2260 | int c; |
2261 | int i; |
2262 | |
2263 | strcpy(buf, prompt); |
2264 | last_status_cksum = 0; // force status update |
2265 | go_bottom_and_clear_to_eol(); |
2266 | write1(prompt); // write out the :, /, or ? prompt |
2267 | |
2268 | i = strlen(buf); |
2269 | while (i < MAX_INPUT_LEN) { |
2270 | c = get_one_char(); |
2271 | if (c == '\n' || c == '\r' || c == 27) |
2272 | break; // this is end of input |
2273 | if (c == erase_char || c == 8 || c == 127) { |
2274 | // user wants to erase prev char |
2275 | buf[--i] = '\0'; |
2276 | write1("\b \b"); // erase char on screen |
2277 | if (i <= 0) // user backs up before b-o-l, exit |
2278 | break; |
2279 | } else if (c > 0 && c < 256) { // exclude Unicode |
2280 | // (TODO: need to handle Unicode) |
2281 | buf[i] = c; |
2282 | buf[++i] = '\0'; |
2283 | bb_putchar(c); |
2284 | } |
2285 | } |
2286 | refresh(FALSE); |
2287 | return buf; |
2288 | #undef buf |
2289 | } |
2290 | |
2291 | static int file_size(const char *fn) // what is the byte size of "fn" |
2292 | { |
2293 | struct stat st_buf; |
2294 | int cnt; |
2295 | |
2296 | cnt = -1; |
2297 | if (fn && fn[0] && stat(fn, &st_buf) == 0) // see if file exists |
2298 | cnt = (int) st_buf.st_size; |
2299 | return cnt; |
2300 | } |
2301 | |
2302 | // might reallocate text[]! |
2303 | static int file_insert(const char *fn, char *p, int update_ro_status) |
2304 | { |
2305 | int cnt = -1; |
2306 | int fd, size; |
2307 | struct stat statbuf; |
2308 | |
2309 | /* Validate file */ |
2310 | if (stat(fn, &statbuf) < 0) { |
2311 | status_line_bold("\"%s\" %s", fn, strerror(errno)); |
2312 | goto fi0; |
2313 | } |
2314 | if (!S_ISREG(statbuf.st_mode)) { |
2315 | // This is not a regular file |
2316 | status_line_bold("\"%s\" Not a regular file", fn); |
2317 | goto fi0; |
2318 | } |
2319 | if (p < text || p > end) { |
2320 | status_line_bold("Trying to insert file outside of memory"); |
2321 | goto fi0; |
2322 | } |
2323 | |
2324 | // read file to buffer |
2325 | fd = open(fn, O_RDONLY); |
2326 | if (fd < 0) { |
2327 | status_line_bold("\"%s\" %s", fn, strerror(errno)); |
2328 | goto fi0; |
2329 | } |
2330 | size = statbuf.st_size; |
2331 | p += text_hole_make(p, size); |
2332 | cnt = safe_read(fd, p, size); |
2333 | if (cnt < 0) { |
2334 | status_line_bold("\"%s\" %s", fn, strerror(errno)); |
2335 | p = text_hole_delete(p, p + size - 1); // un-do buffer insert |
2336 | } else if (cnt < size) { |
2337 | // There was a partial read, shrink unused space text[] |
2338 | p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert |
2339 | status_line_bold("can't read all of file \"%s\"", fn); |
2340 | } |
2341 | if (cnt >= size) |
2342 | file_modified++; |
2343 | close(fd); |
2344 | fi0: |
2345 | #if ENABLE_FEATURE_VI_READONLY |
2346 | if (update_ro_status |
2347 | && ((access(fn, W_OK) < 0) || |
2348 | /* root will always have access() |
2349 | * so we check fileperms too */ |
2350 | !(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH)) |
2351 | ) |
2352 | ) { |
2353 | SET_READONLY_FILE(readonly_mode); |
2354 | } |
2355 | #endif |
2356 | return cnt; |
2357 | } |
2358 | |
2359 | static int file_write(char *fn, char *first, char *last) |
2360 | { |
2361 | int fd, cnt, charcnt; |
2362 | |
2363 | if (fn == 0) { |
2364 | status_line_bold("No current filename"); |
2365 | return -2; |
2366 | } |
2367 | charcnt = 0; |
2368 | /* By popular request we do not open file with O_TRUNC, |
2369 | * but instead ftruncate() it _after_ successful write. |
2370 | * Might reduce amount of data lost on power fail etc. |
2371 | */ |
2372 | fd = open(fn, (O_WRONLY | O_CREAT), 0666); |
2373 | if (fd < 0) |
2374 | return -1; |
2375 | cnt = last - first + 1; |
2376 | charcnt = full_write(fd, first, cnt); |
2377 | ftruncate(fd, charcnt); |
2378 | if (charcnt == cnt) { |
2379 | // good write |
2380 | //file_modified = FALSE; |
2381 | } else { |
2382 | charcnt = 0; |
2383 | } |
2384 | close(fd); |
2385 | return charcnt; |
2386 | } |
2387 | |
2388 | //----- Terminal Drawing --------------------------------------- |
2389 | // The terminal is made up of 'rows' line of 'columns' columns. |
2390 | // classically this would be 24 x 80. |
2391 | // screen coordinates |
2392 | // 0,0 ... 0,79 |
2393 | // 1,0 ... 1,79 |
2394 | // . ... . |
2395 | // . ... . |
2396 | // 22,0 ... 22,79 |
2397 | // 23,0 ... 23,79 <- status line |
2398 | |
2399 | //----- Move the cursor to row x col (count from 0, not 1) ------- |
2400 | static void place_cursor(int row, int col, int optimize) |
2401 | { |
2402 | char cm1[sizeof(CMrc) + sizeof(int)*3 * 2]; |
2403 | #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR |
2404 | enum { |
2405 | SZ_UP = sizeof(CMup), |
2406 | SZ_DN = sizeof(CMdown), |
2407 | SEQ_SIZE = SZ_UP > SZ_DN ? SZ_UP : SZ_DN, |
2408 | }; |
2409 | char cm2[SEQ_SIZE * 5 + 32]; // bigger than worst case size |
2410 | #endif |
2411 | char *cm; |
2412 | |
2413 | if (row < 0) row = 0; |
2414 | if (row >= rows) row = rows - 1; |
2415 | if (col < 0) col = 0; |
2416 | if (col >= columns) col = columns - 1; |
2417 | |
2418 | //----- 1. Try the standard terminal ESC sequence |
2419 | sprintf(cm1, CMrc, row + 1, col + 1); |
2420 | cm = cm1; |
2421 | |
2422 | #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR |
2423 | if (optimize && col < 16) { |
2424 | char *screenp; |
2425 | int Rrow = last_row; |
2426 | int diff = Rrow - row; |
2427 | |
2428 | if (diff < -5 || diff > 5) |
2429 | goto skip; |
2430 | |
2431 | //----- find the minimum # of chars to move cursor ------------- |
2432 | //----- 2. Try moving with discreet chars (Newline, [back]space, ...) |
2433 | cm2[0] = '\0'; |
2434 | |
2435 | // move to the correct row |
2436 | while (row < Rrow) { |
2437 | // the cursor has to move up |
2438 | strcat(cm2, CMup); |
2439 | Rrow--; |
2440 | } |
2441 | while (row > Rrow) { |
2442 | // the cursor has to move down |
2443 | strcat(cm2, CMdown); |
2444 | Rrow++; |
2445 | } |
2446 | |
2447 | // now move to the correct column |
2448 | strcat(cm2, "\r"); // start at col 0 |
2449 | // just send out orignal source char to get to correct place |
2450 | screenp = &screen[row * columns]; // start of screen line |
2451 | strncat(cm2, screenp, col); |
2452 | |
2453 | // pick the shortest cursor motion to send out |
2454 | if (strlen(cm2) < strlen(cm)) { |
2455 | cm = cm2; |
2456 | } |
2457 | skip: ; |
2458 | } |
2459 | last_row = row; |
2460 | #endif /* FEATURE_VI_OPTIMIZE_CURSOR */ |
2461 | write1(cm); |
2462 | } |
2463 | |
2464 | //----- Erase from cursor to end of line ----------------------- |
2465 | static void clear_to_eol(void) |
2466 | { |
2467 | write1(Ceol); // Erase from cursor to end of line |
2468 | } |
2469 | |
2470 | static void go_bottom_and_clear_to_eol(void) |
2471 | { |
2472 | place_cursor(rows - 1, 0, FALSE); // go to bottom of screen |
2473 | clear_to_eol(); // erase to end of line |
2474 | } |
2475 | |
2476 | //----- Erase from cursor to end of screen ----------------------- |
2477 | static void clear_to_eos(void) |
2478 | { |
2479 | write1(Ceos); // Erase from cursor to end of screen |
2480 | } |
2481 | |
2482 | //----- Start standout mode ------------------------------------ |
2483 | static void standout_start(void) // send "start reverse video" sequence |
2484 | { |
2485 | write1(SOs); // Start reverse video mode |
2486 | } |
2487 | |
2488 | //----- End standout mode -------------------------------------- |
2489 | static void standout_end(void) // send "end reverse video" sequence |
2490 | { |
2491 | write1(SOn); // End reverse video mode |
2492 | } |
2493 | |
2494 | //----- Flash the screen -------------------------------------- |
2495 | static void flash(int h) |
2496 | { |
2497 | standout_start(); // send "start reverse video" sequence |
2498 | redraw(TRUE); |
2499 | mysleep(h); |
2500 | standout_end(); // send "end reverse video" sequence |
2501 | redraw(TRUE); |
2502 | } |
2503 | |
2504 | static void Indicate_Error(void) |
2505 | { |
2506 | #if ENABLE_FEATURE_VI_CRASHME |
2507 | if (crashme > 0) |
2508 | return; // generate a random command |
2509 | #endif |
2510 | if (!err_method) { |
2511 | write1(bell); // send out a bell character |
2512 | } else { |
2513 | flash(10); |
2514 | } |
2515 | } |
2516 | |
2517 | //----- Screen[] Routines -------------------------------------- |
2518 | //----- Erase the Screen[] memory ------------------------------ |
2519 | static void screen_erase(void) |
2520 | { |
2521 | memset(screen, ' ', screensize); // clear new screen |
2522 | } |
2523 | |
2524 | static int bufsum(char *buf, int count) |
2525 | { |
2526 | int sum = 0; |
2527 | char *e = buf + count; |
2528 | |
2529 | while (buf < e) |
2530 | sum += (unsigned char) *buf++; |
2531 | return sum; |
2532 | } |
2533 | |
2534 | //----- Draw the status line at bottom of the screen ------------- |
2535 | static void show_status_line(void) |
2536 | { |
2537 | int cnt = 0, cksum = 0; |
2538 | |
2539 | // either we already have an error or status message, or we |
2540 | // create one. |
2541 | if (!have_status_msg) { |
2542 | cnt = format_edit_status(); |
2543 | cksum = bufsum(status_buffer, cnt); |
2544 | } |
2545 | if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) { |
2546 | last_status_cksum = cksum; // remember if we have seen this line |
2547 | go_bottom_and_clear_to_eol(); |
2548 | write1(status_buffer); |
2549 | if (have_status_msg) { |
2550 | if (((int)strlen(status_buffer) - (have_status_msg - 1)) > |
2551 | (columns - 1) ) { |
2552 | have_status_msg = 0; |
2553 | Hit_Return(); |
2554 | } |
2555 | have_status_msg = 0; |
2556 | } |
2557 | place_cursor(crow, ccol, FALSE); // put cursor back in correct place |
2558 | } |
2559 | fflush_all(); |
2560 | } |
2561 | |
2562 | //----- format the status buffer, the bottom line of screen ------ |
2563 | // format status buffer, with STANDOUT mode |
2564 | static void status_line_bold(const char *format, ...) |
2565 | { |
2566 | va_list args; |
2567 | |
2568 | va_start(args, format); |
2569 | strcpy(status_buffer, SOs); // Terminal standout mode on |
2570 | vsprintf(status_buffer + sizeof(SOs)-1, format, args); |
2571 | strcat(status_buffer, SOn); // Terminal standout mode off |
2572 | va_end(args); |
2573 | |
2574 | have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2; |
2575 | } |
2576 | |
2577 | // format status buffer |
2578 | static void status_line(const char *format, ...) |
2579 | { |
2580 | va_list args; |
2581 | |
2582 | va_start(args, format); |
2583 | vsprintf(status_buffer, format, args); |
2584 | va_end(args); |
2585 | |
2586 | have_status_msg = 1; |
2587 | } |
2588 | |
2589 | // copy s to buf, convert unprintable |
2590 | static void print_literal(char *buf, const char *s) |
2591 | { |
2592 | char *d; |
2593 | unsigned char c; |
2594 | |
2595 | buf[0] = '\0'; |
2596 | if (!s[0]) |
2597 | s = "(NULL)"; |
2598 | |
2599 | d = buf; |
2600 | for (; *s; s++) { |
2601 | int c_is_no_print; |
2602 | |
2603 | c = *s; |
2604 | c_is_no_print = (c & 0x80) && !Isprint(c); |
2605 | if (c_is_no_print) { |
2606 | strcpy(d, SOn); |
2607 | d += sizeof(SOn)-1; |
2608 | c = '.'; |
2609 | } |
2610 | if (c < ' ' || c == 0x7f) { |
2611 | *d++ = '^'; |
2612 | c |= '@'; /* 0x40 */ |
2613 | if (c == 0x7f) |
2614 | c = '?'; |
2615 | } |
2616 | *d++ = c; |
2617 | *d = '\0'; |
2618 | if (c_is_no_print) { |
2619 | strcpy(d, SOs); |
2620 | d += sizeof(SOs)-1; |
2621 | } |
2622 | if (*s == '\n') { |
2623 | *d++ = '$'; |
2624 | *d = '\0'; |
2625 | } |
2626 | if (d - buf > MAX_INPUT_LEN - 10) // paranoia |
2627 | break; |
2628 | } |
2629 | } |
2630 | |
2631 | static void not_implemented(const char *s) |
2632 | { |
2633 | char buf[MAX_INPUT_LEN]; |
2634 | |
2635 | print_literal(buf, s); |
2636 | status_line_bold("\'%s\' is not implemented", buf); |
2637 | } |
2638 | |
2639 | // show file status on status line |
2640 | static int format_edit_status(void) |
2641 | { |
2642 | static const char cmd_mode_indicator[] ALIGN1 = "-IR-"; |
2643 | |
2644 | #define tot format_edit_status__tot |
2645 | |
2646 | int cur, percent, ret, trunc_at; |
2647 | |
2648 | // file_modified is now a counter rather than a flag. this |
2649 | // helps reduce the amount of line counting we need to do. |
2650 | // (this will cause a mis-reporting of modified status |
2651 | // once every MAXINT editing operations.) |
2652 | |
2653 | // it would be nice to do a similar optimization here -- if |
2654 | // we haven't done a motion that could have changed which line |
2655 | // we're on, then we shouldn't have to do this count_lines() |
2656 | cur = count_lines(text, dot); |
2657 | |
2658 | // reduce counting -- the total lines can't have |
2659 | // changed if we haven't done any edits. |
2660 | if (file_modified != last_file_modified) { |
2661 | tot = cur + count_lines(dot, end - 1) - 1; |
2662 | last_file_modified = file_modified; |
2663 | } |
2664 | |
2665 | // current line percent |
2666 | // ------------- ~~ ---------- |
2667 | // total lines 100 |
2668 | if (tot > 0) { |
2669 | percent = (100 * cur) / tot; |
2670 | } else { |
2671 | cur = tot = 0; |
2672 | percent = 100; |
2673 | } |
2674 | |
2675 | trunc_at = columns < STATUS_BUFFER_LEN-1 ? |
2676 | columns : STATUS_BUFFER_LEN-1; |
2677 | |
2678 | ret = snprintf(status_buffer, trunc_at+1, |
2679 | #if ENABLE_FEATURE_VI_READONLY |
2680 | "%c %s%s%s %d/%d %d%%", |
2681 | #else |
2682 | "%c %s%s %d/%d %d%%", |
2683 | #endif |
2684 | cmd_mode_indicator[cmd_mode & 3], |
2685 | (current_filename != NULL ? current_filename : "No file"), |
2686 | #if ENABLE_FEATURE_VI_READONLY |
2687 | (readonly_mode ? " [Readonly]" : ""), |
2688 | #endif |
2689 | (file_modified ? " [Modified]" : ""), |
2690 | cur, tot, percent); |
2691 | |
2692 | if (ret >= 0 && ret < trunc_at) |
2693 | return ret; /* it all fit */ |
2694 | |
2695 | return trunc_at; /* had to truncate */ |
2696 | #undef tot |
2697 | } |
2698 | |
2699 | //----- Force refresh of all Lines ----------------------------- |
2700 | static void redraw(int full_screen) |
2701 | { |
2702 | place_cursor(0, 0, FALSE); // put cursor in correct place |
2703 | clear_to_eos(); // tell terminal to erase display |
2704 | screen_erase(); // erase the internal screen buffer |
2705 | last_status_cksum = 0; // force status update |
2706 | refresh(full_screen); // this will redraw the entire display |
2707 | show_status_line(); |
2708 | } |
2709 | |
2710 | //----- Format a text[] line into a buffer --------------------- |
2711 | static char* format_line(char *src /*, int li*/) |
2712 | { |
2713 | unsigned char c; |
2714 | int co; |
2715 | int ofs = offset; |
2716 | char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2] |
2717 | |
2718 | c = '~'; // char in col 0 in non-existent lines is '~' |
2719 | co = 0; |
2720 | while (co < columns + tabstop) { |
2721 | // have we gone past the end? |
2722 | if (src < end) { |
2723 | c = *src++; |
2724 | if (c == '\n') |
2725 | break; |
2726 | if ((c & 0x80) && !Isprint(c)) { |
2727 | c = '.'; |
2728 | } |
2729 | if (c < ' ' || c == 0x7f) { |
2730 | if (c == '\t') { |
2731 | c = ' '; |
2732 | // co % 8 != 7 |
2733 | while ((co % tabstop) != (tabstop - 1)) { |
2734 | dest[co++] = c; |
2735 | } |
2736 | } else { |
2737 | dest[co++] = '^'; |
2738 | if (c == 0x7f) |
2739 | c = '?'; |
2740 | else |
2741 | c += '@'; // Ctrl-X -> 'X' |
2742 | } |
2743 | } |
2744 | } |
2745 | dest[co++] = c; |
2746 | // discard scrolled-off-to-the-left portion, |
2747 | // in tabstop-sized pieces |
2748 | if (ofs >= tabstop && co >= tabstop) { |
2749 | memmove(dest, dest + tabstop, co); |
2750 | co -= tabstop; |
2751 | ofs -= tabstop; |
2752 | } |
2753 | if (src >= end) |
2754 | break; |
2755 | } |
2756 | // check "short line, gigantic offset" case |
2757 | if (co < ofs) |
2758 | ofs = co; |
2759 | // discard last scrolled off part |
2760 | co -= ofs; |
2761 | dest += ofs; |
2762 | // fill the rest with spaces |
2763 | if (co < columns) |
2764 | memset(&dest[co], ' ', columns - co); |
2765 | return dest; |
2766 | } |
2767 | |
2768 | //----- Refresh the changed screen lines ----------------------- |
2769 | // Copy the source line from text[] into the buffer and note |
2770 | // if the current screenline is different from the new buffer. |
2771 | // If they differ then that line needs redrawing on the terminal. |
2772 | // |
2773 | static void refresh(int full_screen) |
2774 | { |
2775 | #define old_offset refresh__old_offset |
2776 | |
2777 | int li, changed; |
2778 | char *tp, *sp; // pointer into text[] and screen[] |
2779 | |
2780 | if (ENABLE_FEATURE_VI_WIN_RESIZE) { |
2781 | unsigned c = columns, r = rows; |
2782 | get_terminal_width_height(0, &columns, &rows); |
2783 | if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS; |
2784 | if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS; |
2785 | full_screen |= (c - columns) | (r - rows); |
2786 | } |
2787 | sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot") |
2788 | tp = screenbegin; // index into text[] of top line |
2789 | |
2790 | // compare text[] to screen[] and mark screen[] lines that need updating |
2791 | for (li = 0; li < rows - 1; li++) { |
2792 | int cs, ce; // column start & end |
2793 | char *out_buf; |
2794 | // format current text line |
2795 | out_buf = format_line(tp /*, li*/); |
2796 | |
2797 | // skip to the end of the current text[] line |
2798 | if (tp < end) { |
2799 | char *t = memchr(tp, '\n', end - tp); |
2800 | if (!t) t = end - 1; |
2801 | tp = t + 1; |
2802 | } |
2803 | |
2804 | // see if there are any changes between vitual screen and out_buf |
2805 | changed = FALSE; // assume no change |
2806 | cs = 0; |
2807 | ce = columns - 1; |
2808 | sp = &screen[li * columns]; // start of screen line |
2809 | if (full_screen) { |
2810 | // force re-draw of every single column from 0 - columns-1 |
2811 | goto re0; |
2812 | } |
2813 | // compare newly formatted buffer with virtual screen |
2814 | // look forward for first difference between buf and screen |
2815 | for (; cs <= ce; cs++) { |
2816 | if (out_buf[cs] != sp[cs]) { |
2817 | changed = TRUE; // mark for redraw |
2818 | break; |
2819 | } |
2820 | } |
2821 | |
2822 | // look backward for last difference between out_buf and screen |
2823 | for (; ce >= cs; ce--) { |
2824 | if (out_buf[ce] != sp[ce]) { |
2825 | changed = TRUE; // mark for redraw |
2826 | break; |
2827 | } |
2828 | } |
2829 | // now, cs is index of first diff, and ce is index of last diff |
2830 | |
2831 | // if horz offset has changed, force a redraw |
2832 | if (offset != old_offset) { |
2833 | re0: |
2834 | changed = TRUE; |
2835 | } |
2836 | |
2837 | // make a sanity check of columns indexes |
2838 | if (cs < 0) cs = 0; |
2839 | if (ce > columns - 1) ce = columns - 1; |
2840 | if (cs > ce) { cs = 0; ce = columns - 1; } |
2841 | // is there a change between vitual screen and out_buf |
2842 | if (changed) { |
2843 | // copy changed part of buffer to virtual screen |
2844 | memcpy(sp+cs, out_buf+cs, ce-cs+1); |
2845 | |
2846 | // move cursor to column of first change |
2847 | //if (offset != old_offset) { |
2848 | // // place_cursor is still too stupid |
2849 | // // to handle offsets correctly |
2850 | // place_cursor(li, cs, FALSE); |
2851 | //} else { |
2852 | place_cursor(li, cs, TRUE); |
2853 | //} |
2854 | |
2855 | // write line out to terminal |
2856 | fwrite(&sp[cs], ce - cs + 1, 1, stdout); |
2857 | } |
2858 | } |
2859 | |
2860 | place_cursor(crow, ccol, TRUE); |
2861 | |
2862 | old_offset = offset; |
2863 | #undef old_offset |
2864 | } |
2865 | |
2866 | //--------------------------------------------------------------------- |
2867 | //----- the Ascii Chart ----------------------------------------------- |
2868 | // |
2869 | // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel |
2870 | // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si |
2871 | // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb |
2872 | // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us |
2873 | // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 ' |
2874 | // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f / |
2875 | // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7 |
2876 | // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ? |
2877 | // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G |
2878 | // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O |
2879 | // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W |
2880 | // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _ |
2881 | // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g |
2882 | // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o |
2883 | // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w |
2884 | // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del |
2885 | //--------------------------------------------------------------------- |
2886 | |
2887 | //----- Execute a Vi Command ----------------------------------- |
2888 | static void do_cmd(int c) |
2889 | { |
2890 | const char *msg = msg; // for compiler |
2891 | char *p, *q, *save_dot; |
2892 | char buf[12]; |
2893 | int dir; |
2894 | int cnt, i, j; |
2895 | int c1; |
2896 | |
2897 | // c1 = c; // quiet the compiler |
2898 | // cnt = yf = 0; // quiet the compiler |
2899 | // msg = p = q = save_dot = buf; // quiet the compiler |
2900 | memset(buf, '\0', 12); |
2901 | |
2902 | show_status_line(); |
2903 | |
2904 | /* if this is a cursor key, skip these checks */ |
2905 | switch (c) { |
2906 | case KEYCODE_UP: |
2907 | case KEYCODE_DOWN: |
2908 | case KEYCODE_LEFT: |
2909 | case KEYCODE_RIGHT: |
2910 | case KEYCODE_HOME: |
2911 | case KEYCODE_END: |
2912 | case KEYCODE_PAGEUP: |
2913 | case KEYCODE_PAGEDOWN: |
2914 | case KEYCODE_DELETE: |
2915 | goto key_cmd_mode; |
2916 | } |
2917 | |
2918 | if (cmd_mode == 2) { |
2919 | // flip-flop Insert/Replace mode |
2920 | if (c == KEYCODE_INSERT) |
2921 | goto dc_i; |
2922 | // we are 'R'eplacing the current *dot with new char |
2923 | if (*dot == '\n') { |
2924 | // don't Replace past E-o-l |
2925 | cmd_mode = 1; // convert to insert |
2926 | } else { |
2927 | if (1 <= c || Isprint(c)) { |
2928 | if (c != 27) |
2929 | dot = yank_delete(dot, dot, 0, YANKDEL); // delete char |
2930 | dot = char_insert(dot, c); // insert new char |
2931 | } |
2932 | goto dc1; |
2933 | } |
2934 | } |
2935 | if (cmd_mode == 1) { |
2936 | // hitting "Insert" twice means "R" replace mode |
2937 | if (c == KEYCODE_INSERT) goto dc5; |
2938 | // insert the char c at "dot" |
2939 | if (1 <= c || Isprint(c)) { |
2940 | dot = char_insert(dot, c); |
2941 | } |
2942 | goto dc1; |
2943 | } |
2944 | |
2945 | key_cmd_mode: |
2946 | switch (c) { |
2947 | //case 0x01: // soh |
2948 | //case 0x09: // ht |
2949 | //case 0x0b: // vt |
2950 | //case 0x0e: // so |
2951 | //case 0x0f: // si |
2952 | //case 0x10: // dle |
2953 | //case 0x11: // dc1 |
2954 | //case 0x13: // dc3 |
2955 | #if ENABLE_FEATURE_VI_CRASHME |
2956 | case 0x14: // dc4 ctrl-T |
2957 | crashme = (crashme == 0) ? 1 : 0; |
2958 | break; |
2959 | #endif |
2960 | //case 0x16: // syn |
2961 | //case 0x17: // etb |
2962 | //case 0x18: // can |
2963 | //case 0x1c: // fs |
2964 | //case 0x1d: // gs |
2965 | //case 0x1e: // rs |
2966 | //case 0x1f: // us |
2967 | //case '!': // !- |
2968 | //case '#': // #- |
2969 | //case '&': // &- |
2970 | //case '(': // (- |
2971 | //case ')': // )- |
2972 | //case '*': // *- |
2973 | //case '=': // =- |
2974 | //case '@': // @- |
2975 | //case 'F': // F- |
2976 | //case 'K': // K- |
2977 | //case 'Q': // Q- |
2978 | //case 'S': // S- |
2979 | //case 'T': // T- |
2980 | //case 'V': // V- |
2981 | //case '[': // [- |
2982 | //case '\\': // \- |
2983 | //case ']': // ]- |
2984 | //case '_': // _- |
2985 | //case '`': // `- |
2986 | //case 'u': // u- FIXME- there is no undo |
2987 | //case 'v': // v- |
2988 | default: // unrecognized command |
2989 | buf[0] = c; |
2990 | buf[1] = '\0'; |
2991 | not_implemented(buf); |
2992 | end_cmd_q(); // stop adding to q |
2993 | case 0x00: // nul- ignore |
2994 | break; |
2995 | case 2: // ctrl-B scroll up full screen |
2996 | case KEYCODE_PAGEUP: // Cursor Key Page Up |
2997 | dot_scroll(rows - 2, -1); |
2998 | break; |
2999 | case 4: // ctrl-D scroll down half screen |
3000 | dot_scroll((rows - 2) / 2, 1); |
3001 | break; |
3002 | case 5: // ctrl-E scroll down one line |
3003 | dot_scroll(1, 1); |
3004 | break; |
3005 | case 6: // ctrl-F scroll down full screen |
3006 | case KEYCODE_PAGEDOWN: // Cursor Key Page Down |
3007 | dot_scroll(rows - 2, 1); |
3008 | break; |
3009 | case 7: // ctrl-G show current status |
3010 | last_status_cksum = 0; // force status update |
3011 | break; |
3012 | case 'h': // h- move left |
3013 | case KEYCODE_LEFT: // cursor key Left |
3014 | case 8: // ctrl-H- move left (This may be ERASE char) |
3015 | case 0x7f: // DEL- move left (This may be ERASE char) |
3016 | if (cmdcnt-- > 1) { |
3017 | do_cmd(c); |
3018 | } // repeat cnt |
3019 | dot_left(); |
3020 | break; |
3021 | case 10: // Newline ^J |
3022 | case 'j': // j- goto next line, same col |
3023 | case KEYCODE_DOWN: // cursor key Down |
3024 | if (cmdcnt-- > 1) { |
3025 | do_cmd(c); |
3026 | } // repeat cnt |
3027 | dot_next(); // go to next B-o-l |
3028 | dot = move_to_col(dot, ccol + offset); // try stay in same col |
3029 | break; |
3030 | case 12: // ctrl-L force redraw whole screen |
3031 | case 18: // ctrl-R force redraw |
3032 | place_cursor(0, 0, FALSE); // put cursor in correct place |
3033 | clear_to_eos(); // tel terminal to erase display |
3034 | mysleep(10); |
3035 | screen_erase(); // erase the internal screen buffer |
3036 | last_status_cksum = 0; // force status update |
3037 | refresh(TRUE); // this will redraw the entire display |
3038 | break; |
3039 | case 13: // Carriage Return ^M |
3040 | case '+': // +- goto next line |
3041 | if (cmdcnt-- > 1) { |
3042 | do_cmd(c); |
3043 | } // repeat cnt |
3044 | dot_next(); |
3045 | dot_skip_over_ws(); |
3046 | break; |
3047 | case 21: // ctrl-U scroll up half screen |
3048 | dot_scroll((rows - 2) / 2, -1); |
3049 | break; |
3050 | case 25: // ctrl-Y scroll up one line |
3051 | dot_scroll(1, -1); |
3052 | break; |
3053 | case 27: // esc |
3054 | if (cmd_mode == 0) |
3055 | indicate_error(c); |
3056 | cmd_mode = 0; // stop insrting |
3057 | end_cmd_q(); |
3058 | last_status_cksum = 0; // force status update |
3059 | break; |
3060 | case ' ': // move right |
3061 | case 'l': // move right |
3062 | case KEYCODE_RIGHT: // Cursor Key Right |
3063 | if (cmdcnt-- > 1) { |
3064 | do_cmd(c); |
3065 | } // repeat cnt |
3066 | dot_right(); |
3067 | break; |
3068 | #if ENABLE_FEATURE_VI_YANKMARK |
3069 | case '"': // "- name a register to use for Delete/Yank |
3070 | c1 = (get_one_char() | 0x20) - 'a'; // | 0x20 is tolower() |
3071 | if ((unsigned)c1 <= 25) { // a-z? |
3072 | YDreg = c1; |
3073 | } else { |
3074 | indicate_error(c); |
3075 | } |
3076 | break; |
3077 | case '\'': // '- goto a specific mark |
3078 | c1 = (get_one_char() | 0x20) - 'a'; |
3079 | if ((unsigned)c1 <= 25) { // a-z? |
3080 | // get the b-o-l |
3081 | q = mark[c1]; |
3082 | if (text <= q && q < end) { |
3083 | dot = q; |
3084 | dot_begin(); // go to B-o-l |
3085 | dot_skip_over_ws(); |
3086 | } |
3087 | } else if (c1 == '\'') { // goto previous context |
3088 | dot = swap_context(dot); // swap current and previous context |
3089 | dot_begin(); // go to B-o-l |
3090 | dot_skip_over_ws(); |
3091 | } else { |
3092 | indicate_error(c); |
3093 | } |
3094 | break; |
3095 | case 'm': // m- Mark a line |
3096 | // this is really stupid. If there are any inserts or deletes |
3097 | // between text[0] and dot then this mark will not point to the |
3098 | // correct location! It could be off by many lines! |
3099 | // Well..., at least its quick and dirty. |
3100 | c1 = (get_one_char() | 0x20) - 'a'; |
3101 | if ((unsigned)c1 <= 25) { // a-z? |
3102 | // remember the line |
3103 | mark[c1] = dot; |
3104 | } else { |
3105 | indicate_error(c); |
3106 | } |
3107 | break; |
3108 | case 'P': // P- Put register before |
3109 | case 'p': // p- put register after |
3110 | p = reg[YDreg]; |
3111 | if (p == NULL) { |
3112 | status_line_bold("Nothing in register %c", what_reg()); |
3113 | break; |
3114 | } |
3115 | // are we putting whole lines or strings |
3116 | if (strchr(p, '\n') != NULL) { |
3117 | if (c == 'P') { |
3118 | dot_begin(); // putting lines- Put above |
3119 | } |
3120 | if (c == 'p') { |
3121 | // are we putting after very last line? |
3122 | if (end_line(dot) == (end - 1)) { |
3123 | dot = end; // force dot to end of text[] |
3124 | } else { |
3125 | dot_next(); // next line, then put before |
3126 | } |
3127 | } |
3128 | } else { |
3129 | if (c == 'p') |
3130 | dot_right(); // move to right, can move to NL |
3131 | } |
3132 | string_insert(dot, p); // insert the string |
3133 | end_cmd_q(); // stop adding to q |
3134 | break; |
3135 | case 'U': // U- Undo; replace current line with original version |
3136 | if (reg[Ureg] != 0) { |
3137 | p = begin_line(dot); |
3138 | q = end_line(dot); |
3139 | p = text_hole_delete(p, q); // delete cur line |
3140 | p += string_insert(p, reg[Ureg]); // insert orig line |
3141 | dot = p; |
3142 | dot_skip_over_ws(); |
3143 | } |
3144 | break; |
3145 | #endif /* FEATURE_VI_YANKMARK */ |
3146 | case '$': // $- goto end of line |
3147 | case KEYCODE_END: // Cursor Key End |
3148 | if (cmdcnt-- > 1) { |
3149 | do_cmd(c); |
3150 | } // repeat cnt |
3151 | dot = end_line(dot); |
3152 | break; |
3153 | case '%': // %- find matching char of pair () [] {} |
3154 | for (q = dot; q < end && *q != '\n'; q++) { |
3155 | if (strchr("()[]{}", *q) != NULL) { |
3156 | // we found half of a pair |
3157 | p = find_pair(q, *q); |
3158 | if (p == NULL) { |
3159 | indicate_error(c); |
3160 | } else { |
3161 | dot = p; |
3162 | } |
3163 | break; |
3164 | } |
3165 | } |
3166 | if (*q == '\n') |
3167 | indicate_error(c); |
3168 | break; |
3169 | case 'f': // f- forward to a user specified char |
3170 | last_forward_char = get_one_char(); // get the search char |
3171 | // |
3172 | // dont separate these two commands. 'f' depends on ';' |
3173 | // |
3174 | //**** fall through to ... ';' |
3175 | case ';': // ;- look at rest of line for last forward char |
3176 | if (cmdcnt-- > 1) { |
3177 | do_cmd(';'); |
3178 | } // repeat cnt |
3179 | if (last_forward_char == 0) |
3180 | break; |
3181 | q = dot + 1; |
3182 | while (q < end - 1 && *q != '\n' && *q != last_forward_char) { |
3183 | q++; |
3184 | } |
3185 | if (*q == last_forward_char) |
3186 | dot = q; |
3187 | break; |
3188 | case ',': // repeat latest 'f' in opposite direction |
3189 | if (cmdcnt-- > 1) { |
3190 | do_cmd(','); |
3191 | } // repeat cnt |
3192 | if (last_forward_char == 0) |
3193 | break; |
3194 | q = dot - 1; |
3195 | while (q >= text && *q != '\n' && *q != last_forward_char) { |
3196 | q--; |
3197 | } |
3198 | if (q >= text && *q == last_forward_char) |
3199 | dot = q; |
3200 | break; |
3201 | |
3202 | case '-': // -- goto prev line |
3203 | if (cmdcnt-- > 1) { |
3204 | do_cmd(c); |
3205 | } // repeat cnt |
3206 | dot_prev(); |
3207 | dot_skip_over_ws(); |
3208 | break; |
3209 | #if ENABLE_FEATURE_VI_DOT_CMD |
3210 | case '.': // .- repeat the last modifying command |
3211 | // Stuff the last_modifying_cmd back into stdin |
3212 | // and let it be re-executed. |
3213 | if (lmc_len > 0) { |
3214 | last_modifying_cmd[lmc_len] = 0; |
3215 | ioq = ioq_start = xstrdup(last_modifying_cmd); |
3216 | } |
3217 | break; |
3218 | #endif |
3219 | #if ENABLE_FEATURE_VI_SEARCH |
3220 | case '?': // /- search for a pattern |
3221 | case '/': // /- search for a pattern |
3222 | buf[0] = c; |
3223 | buf[1] = '\0'; |
3224 | q = get_input_line(buf); // get input line- use "status line" |
3225 | if (q[0] && !q[1]) { |
3226 | if (last_search_pattern[0]) |
3227 | last_search_pattern[0] = c; |
3228 | goto dc3; // if no pat re-use old pat |
3229 | } |
3230 | if (q[0]) { // strlen(q) > 1: new pat- save it and find |
3231 | // there is a new pat |
3232 | free(last_search_pattern); |
3233 | last_search_pattern = xstrdup(q); |
3234 | goto dc3; // now find the pattern |
3235 | } |
3236 | // user changed mind and erased the "/"- do nothing |
3237 | break; |
3238 | case 'N': // N- backward search for last pattern |
3239 | if (cmdcnt-- > 1) { |
3240 | do_cmd(c); |
3241 | } // repeat cnt |
3242 | dir = BACK; // assume BACKWARD search |
3243 | p = dot - 1; |
3244 | if (last_search_pattern[0] == '?') { |
3245 | dir = FORWARD; |
3246 | p = dot + 1; |
3247 | } |
3248 | goto dc4; // now search for pattern |
3249 | break; |
3250 | case 'n': // n- repeat search for last pattern |
3251 | // search rest of text[] starting at next char |
3252 | // if search fails return orignal "p" not the "p+1" address |
3253 | if (cmdcnt-- > 1) { |
3254 | do_cmd(c); |
3255 | } // repeat cnt |
3256 | dc3: |
3257 | dir = FORWARD; // assume FORWARD search |
3258 | p = dot + 1; |
3259 | if (last_search_pattern[0] == '?') { |
3260 | dir = BACK; |
3261 | p = dot - 1; |
3262 | } |
3263 | dc4: |
3264 | q = char_search(p, last_search_pattern + 1, dir, FULL); |
3265 | if (q != NULL) { |
3266 | dot = q; // good search, update "dot" |
3267 | msg = ""; |
3268 | goto dc2; |
3269 | } |
3270 | // no pattern found between "dot" and "end"- continue at top |
3271 | p = text; |
3272 | if (dir == BACK) { |
3273 | p = end - 1; |
3274 | } |
3275 | q = char_search(p, last_search_pattern + 1, dir, FULL); |
3276 | if (q != NULL) { // found something |
3277 | dot = q; // found new pattern- goto it |
3278 | msg = "search hit BOTTOM, continuing at TOP"; |
3279 | if (dir == BACK) { |
3280 | msg = "search hit TOP, continuing at BOTTOM"; |
3281 | } |
3282 | } else { |
3283 | msg = "Pattern not found"; |
3284 | } |
3285 | dc2: |
3286 | if (*msg) |
3287 | status_line_bold("%s", msg); |
3288 | break; |
3289 | case '{': // {- move backward paragraph |
3290 | q = char_search(dot, "\n\n", BACK, FULL); |
3291 | if (q != NULL) { // found blank line |
3292 | dot = next_line(q); // move to next blank line |
3293 | } |
3294 | break; |
3295 | case '}': // }- move forward paragraph |
3296 | q = char_search(dot, "\n\n", FORWARD, FULL); |
3297 | if (q != NULL) { // found blank line |
3298 | dot = next_line(q); // move to next blank line |
3299 | } |
3300 | break; |
3301 | #endif /* FEATURE_VI_SEARCH */ |
3302 | case '0': // 0- goto begining of line |
3303 | case '1': // 1- |
3304 | case '2': // 2- |
3305 | case '3': // 3- |
3306 | case '4': // 4- |
3307 | case '5': // 5- |
3308 | case '6': // 6- |
3309 | case '7': // 7- |
3310 | case '8': // 8- |
3311 | case '9': // 9- |
3312 | if (c == '0' && cmdcnt < 1) { |
3313 | dot_begin(); // this was a standalone zero |
3314 | } else { |
3315 | cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number |
3316 | } |
3317 | break; |
3318 | case ':': // :- the colon mode commands |
3319 | p = get_input_line(":"); // get input line- use "status line" |
3320 | #if ENABLE_FEATURE_VI_COLON |
3321 | colon(p); // execute the command |
3322 | #else |
3323 | if (*p == ':') |
3324 | p++; // move past the ':' |
3325 | cnt = strlen(p); |
3326 | if (cnt <= 0) |
3327 | break; |
3328 | if (strncmp(p, "quit", cnt) == 0 |
3329 | || strncmp(p, "q!", cnt) == 0 // delete lines |
3330 | ) { |
3331 | if (file_modified && p[1] != '!') { |
3332 | status_line_bold("No write since last change (:quit! overrides)"); |
3333 | } else { |
3334 | editing = 0; |
3335 | } |
3336 | } else if (strncmp(p, "write", cnt) == 0 |
3337 | || strncmp(p, "wq", cnt) == 0 |
3338 | || strncmp(p, "wn", cnt) == 0 |
3339 | || (p[0] == 'x' && !p[1]) |
3340 | ) { |
3341 | cnt = file_write(current_filename, text, end - 1); |
3342 | if (cnt < 0) { |
3343 | if (cnt == -1) |
3344 | status_line_bold("Write error: %s", strerror(errno)); |
3345 | } else { |
3346 | file_modified = 0; |
3347 | last_file_modified = -1; |
3348 | status_line("\"%s\" %dL, %dC", current_filename, count_lines(text, end - 1), cnt); |
3349 | if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n' |
3350 | || p[0] == 'X' || p[1] == 'Q' || p[1] == 'N' |
3351 | ) { |
3352 | editing = 0; |
3353 | } |
3354 | } |
3355 | } else if (strncmp(p, "file", cnt) == 0) { |
3356 | last_status_cksum = 0; // force status update |
3357 | } else if (sscanf(p, "%d", &j) > 0) { |
3358 | dot = find_line(j); // go to line # j |
3359 | dot_skip_over_ws(); |
3360 | } else { // unrecognized cmd |
3361 | not_implemented(p); |
3362 | } |
3363 | #endif /* !FEATURE_VI_COLON */ |
3364 | break; |
3365 | case '<': // <- Left shift something |
3366 | case '>': // >- Right shift something |
3367 | cnt = count_lines(text, dot); // remember what line we are on |
3368 | c1 = get_one_char(); // get the type of thing to delete |
3369 | find_range(&p, &q, c1); |
3370 | yank_delete(p, q, 1, YANKONLY); // save copy before change |
3371 | p = begin_line(p); |
3372 | q = end_line(q); |
3373 | i = count_lines(p, q); // # of lines we are shifting |
3374 | for ( ; i > 0; i--, p = next_line(p)) { |
3375 | if (c == '<') { |
3376 | // shift left- remove tab or 8 spaces |
3377 | if (*p == '\t') { |
3378 | // shrink buffer 1 char |
3379 | text_hole_delete(p, p); |
3380 | } else if (*p == ' ') { |
3381 | // we should be calculating columns, not just SPACE |
3382 | for (j = 0; *p == ' ' && j < tabstop; j++) { |
3383 | text_hole_delete(p, p); |
3384 | } |
3385 | } |
3386 | } else if (c == '>') { |
3387 | // shift right -- add tab or 8 spaces |
3388 | char_insert(p, '\t'); |
3389 | } |
3390 | } |
3391 | dot = find_line(cnt); // what line were we on |
3392 | dot_skip_over_ws(); |
3393 | end_cmd_q(); // stop adding to q |
3394 | break; |
3395 | case 'A': // A- append at e-o-l |
3396 | dot_end(); // go to e-o-l |
3397 | //**** fall through to ... 'a' |
3398 | case 'a': // a- append after current char |
3399 | if (*dot != '\n') |
3400 | dot++; |
3401 | goto dc_i; |
3402 | break; |
3403 | case 'B': // B- back a blank-delimited Word |
3404 | case 'E': // E- end of a blank-delimited word |
3405 | case 'W': // W- forward a blank-delimited word |
3406 | if (cmdcnt-- > 1) { |
3407 | do_cmd(c); |
3408 | } // repeat cnt |
3409 | dir = FORWARD; |
3410 | if (c == 'B') |
3411 | dir = BACK; |
3412 | if (c == 'W' || isspace(dot[dir])) { |
3413 | dot = skip_thing(dot, 1, dir, S_TO_WS); |
3414 | dot = skip_thing(dot, 2, dir, S_OVER_WS); |
3415 | } |
3416 | if (c != 'W') |
3417 | dot = skip_thing(dot, 1, dir, S_BEFORE_WS); |
3418 | break; |
3419 | case 'C': // C- Change to e-o-l |
3420 | case 'D': // D- delete to e-o-l |
3421 | save_dot = dot; |
3422 | dot = dollar_line(dot); // move to before NL |
3423 | // copy text into a register and delete |
3424 | dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l |
3425 | if (c == 'C') |
3426 | goto dc_i; // start inserting |
3427 | #if ENABLE_FEATURE_VI_DOT_CMD |
3428 | if (c == 'D') |
3429 | end_cmd_q(); // stop adding to q |
3430 | #endif |
3431 | break; |
3432 | case 'g': // 'gg' goto a line number (vim) (default: very first line) |
3433 | c1 = get_one_char(); |
3434 | if (c1 != 'g') { |
3435 | buf[0] = 'g'; |
3436 | buf[1] = c1; // TODO: if Unicode? |
3437 | buf[2] = '\0'; |
3438 | not_implemented(buf); |
3439 | break; |
3440 | } |
3441 | if (cmdcnt == 0) |
3442 | cmdcnt = 1; |
3443 | /* fall through */ |
3444 | case 'G': // G- goto to a line number (default= E-O-F) |
3445 | dot = end - 1; // assume E-O-F |
3446 | if (cmdcnt > 0) { |
3447 | dot = find_line(cmdcnt); // what line is #cmdcnt |
3448 | } |
3449 | dot_skip_over_ws(); |
3450 | break; |
3451 | case 'H': // H- goto top line on screen |
3452 | dot = screenbegin; |
3453 | if (cmdcnt > (rows - 1)) { |
3454 | cmdcnt = (rows - 1); |
3455 | } |
3456 | if (cmdcnt-- > 1) { |
3457 | do_cmd('+'); |
3458 | } // repeat cnt |
3459 | dot_skip_over_ws(); |
3460 | break; |
3461 | case 'I': // I- insert before first non-blank |
3462 | dot_begin(); // 0 |
3463 | dot_skip_over_ws(); |
3464 | //**** fall through to ... 'i' |
3465 | case 'i': // i- insert before current char |
3466 | case KEYCODE_INSERT: // Cursor Key Insert |
3467 | dc_i: |
3468 | cmd_mode = 1; // start insrting |
3469 | break; |
3470 | case 'J': // J- join current and next lines together |
3471 | if (cmdcnt-- > 2) { |
3472 | do_cmd(c); |
3473 | } // repeat cnt |
3474 | dot_end(); // move to NL |
3475 | if (dot < end - 1) { // make sure not last char in text[] |
3476 | *dot++ = ' '; // replace NL with space |
3477 | file_modified++; |
3478 | while (isblank(*dot)) { // delete leading WS |
3479 | dot_delete(); |
3480 | } |
3481 | } |
3482 | end_cmd_q(); // stop adding to q |
3483 | break; |
3484 | case 'L': // L- goto bottom line on screen |
3485 | dot = end_screen(); |
3486 | if (cmdcnt > (rows - 1)) { |
3487 | cmdcnt = (rows - 1); |
3488 | } |
3489 | if (cmdcnt-- > 1) { |
3490 | do_cmd('-'); |
3491 | } // repeat cnt |
3492 | dot_begin(); |
3493 | dot_skip_over_ws(); |
3494 | break; |
3495 | case 'M': // M- goto middle line on screen |
3496 | dot = screenbegin; |
3497 | for (cnt = 0; cnt < (rows-1) / 2; cnt++) |
3498 | dot = next_line(dot); |
3499 | break; |
3500 | case 'O': // O- open a empty line above |
3501 | // 0i\n ESC -i |
3502 | p = begin_line(dot); |
3503 | if (p[-1] == '\n') { |
3504 | dot_prev(); |
3505 | case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..." |
3506 | dot_end(); |
3507 | dot = char_insert(dot, '\n'); |
3508 | } else { |
3509 | dot_begin(); // 0 |
3510 | dot = char_insert(dot, '\n'); // i\n ESC |
3511 | dot_prev(); // - |
3512 | } |
3513 | goto dc_i; |
3514 | break; |
3515 | case 'R': // R- continuous Replace char |
3516 | dc5: |
3517 | cmd_mode = 2; |
3518 | break; |
3519 | case KEYCODE_DELETE: |
3520 | c = 'x'; |
3521 | // fall through |
3522 | case 'X': // X- delete char before dot |
3523 | case 'x': // x- delete the current char |
3524 | case 's': // s- substitute the current char |
3525 | if (cmdcnt-- > 1) { |
3526 | do_cmd(c); |
3527 | } // repeat cnt |
3528 | dir = 0; |
3529 | if (c == 'X') |
3530 | dir = -1; |
3531 | if (dot[dir] != '\n') { |
3532 | if (c == 'X') |
3533 | dot--; // delete prev char |
3534 | dot = yank_delete(dot, dot, 0, YANKDEL); // delete char |
3535 | } |
3536 | if (c == 's') |
3537 | goto dc_i; // start insrting |
3538 | end_cmd_q(); // stop adding to q |
3539 | break; |
3540 | case 'Z': // Z- if modified, {write}; exit |
3541 | // ZZ means to save file (if necessary), then exit |
3542 | c1 = get_one_char(); |
3543 | if (c1 != 'Z') { |
3544 | indicate_error(c); |
3545 | break; |
3546 | } |
3547 | if (file_modified) { |
3548 | if (ENABLE_FEATURE_VI_READONLY && readonly_mode) { |
3549 | status_line_bold("\"%s\" File is read only", current_filename); |
3550 | break; |
3551 | } |
3552 | cnt = file_write(current_filename, text, end - 1); |
3553 | if (cnt < 0) { |
3554 | if (cnt == -1) |
3555 | status_line_bold("Write error: %s", strerror(errno)); |
3556 | } else if (cnt == (end - 1 - text + 1)) { |
3557 | editing = 0; |
3558 | } |
3559 | } else { |
3560 | editing = 0; |
3561 | } |
3562 | break; |
3563 | case '^': // ^- move to first non-blank on line |
3564 | dot_begin(); |
3565 | dot_skip_over_ws(); |
3566 | break; |
3567 | case 'b': // b- back a word |
3568 | case 'e': // e- end of word |
3569 | if (cmdcnt-- > 1) { |
3570 | do_cmd(c); |
3571 | } // repeat cnt |
3572 | dir = FORWARD; |
3573 | if (c == 'b') |
3574 | dir = BACK; |
3575 | if ((dot + dir) < text || (dot + dir) > end - 1) |
3576 | break; |
3577 | dot += dir; |
3578 | if (isspace(*dot)) { |
3579 | dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS); |
3580 | } |
3581 | if (isalnum(*dot) || *dot == '_') { |
3582 | dot = skip_thing(dot, 1, dir, S_END_ALNUM); |
3583 | } else if (ispunct(*dot)) { |
3584 | dot = skip_thing(dot, 1, dir, S_END_PUNCT); |
3585 | } |
3586 | break; |
3587 | case 'c': // c- change something |
3588 | case 'd': // d- delete something |
3589 | #if ENABLE_FEATURE_VI_YANKMARK |
3590 | case 'y': // y- yank something |
3591 | case 'Y': // Y- Yank a line |
3592 | #endif |
3593 | { |
3594 | int yf, ml, whole = 0; |
3595 | yf = YANKDEL; // assume either "c" or "d" |
3596 | #if ENABLE_FEATURE_VI_YANKMARK |
3597 | if (c == 'y' || c == 'Y') |
3598 | yf = YANKONLY; |
3599 | #endif |
3600 | c1 = 'y'; |
3601 | if (c != 'Y') |
3602 | c1 = get_one_char(); // get the type of thing to delete |
3603 | // determine range, and whether it spans lines |
3604 | ml = find_range(&p, &q, c1); |
3605 | if (c1 == 27) { // ESC- user changed mind and wants out |
3606 | c = c1 = 27; // Escape- do nothing |
3607 | } else if (strchr("wW", c1)) { |
3608 | if (c == 'c') { |
3609 | // don't include trailing WS as part of word |
3610 | while (isblank(*q)) { |
3611 | if (q <= text || q[-1] == '\n') |
3612 | break; |
3613 | q--; |
3614 | } |
3615 | } |
3616 | dot = yank_delete(p, q, ml, yf); // delete word |
3617 | } else if (strchr("^0bBeEft%$ lh\b\177", c1)) { |
3618 | // partial line copy text into a register and delete |
3619 | dot = yank_delete(p, q, ml, yf); // delete word |
3620 | } else if (strchr("cdykjHL+-{}\r\n", c1)) { |
3621 | // whole line copy text into a register and delete |
3622 | dot = yank_delete(p, q, ml, yf); // delete lines |
3623 | whole = 1; |
3624 | } else { |
3625 | // could not recognize object |
3626 | c = c1 = 27; // error- |
3627 | ml = 0; |
3628 | indicate_error(c); |
3629 | } |
3630 | if (ml && whole) { |
3631 | if (c == 'c') { |
3632 | dot = char_insert(dot, '\n'); |
3633 | // on the last line of file don't move to prev line |
3634 | if (whole && dot != (end-1)) { |
3635 | dot_prev(); |
3636 | } |
3637 | } else if (c == 'd') { |
3638 | dot_begin(); |
3639 | dot_skip_over_ws(); |
3640 | } |
3641 | } |
3642 | if (c1 != 27) { |
3643 | // if CHANGING, not deleting, start inserting after the delete |
3644 | if (c == 'c') { |
3645 | strcpy(buf, "Change"); |
3646 | goto dc_i; // start inserting |
3647 | } |
3648 | if (c == 'd') { |
3649 | strcpy(buf, "Delete"); |
3650 | } |
3651 | #if ENABLE_FEATURE_VI_YANKMARK |
3652 | if (c == 'y' || c == 'Y') { |
3653 | strcpy(buf, "Yank"); |
3654 | } |
3655 | p = reg[YDreg]; |
3656 | q = p + strlen(p); |
3657 | for (cnt = 0; p <= q; p++) { |
3658 | if (*p == '\n') |
3659 | cnt++; |
3660 | } |
3661 | status_line("%s %d lines (%d chars) using [%c]", |
3662 | buf, cnt, strlen(reg[YDreg]), what_reg()); |
3663 | #endif |
3664 | end_cmd_q(); // stop adding to q |
3665 | } |
3666 | break; |
3667 | } |
3668 | case 'k': // k- goto prev line, same col |
3669 | case KEYCODE_UP: // cursor key Up |
3670 | if (cmdcnt-- > 1) { |
3671 | do_cmd(c); |
3672 | } // repeat cnt |
3673 | dot_prev(); |
3674 | dot = move_to_col(dot, ccol + offset); // try stay in same col |
3675 | break; |
3676 | case 'r': // r- replace the current char with user input |
3677 | c1 = get_one_char(); // get the replacement char |
3678 | if (*dot != '\n') { |
3679 | *dot = c1; |
3680 | file_modified++; |
3681 | } |
3682 | end_cmd_q(); // stop adding to q |
3683 | break; |
3684 | case 't': // t- move to char prior to next x |
3685 | last_forward_char = get_one_char(); |
3686 | do_cmd(';'); |
3687 | if (*dot == last_forward_char) |
3688 | dot_left(); |
3689 | last_forward_char = 0; |
3690 | break; |
3691 | case 'w': // w- forward a word |
3692 | if (cmdcnt-- > 1) { |
3693 | do_cmd(c); |
3694 | } // repeat cnt |
3695 | if (isalnum(*dot) || *dot == '_') { // we are on ALNUM |
3696 | dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM); |
3697 | } else if (ispunct(*dot)) { // we are on PUNCT |
3698 | dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT); |
3699 | } |
3700 | if (dot < end - 1) |
3701 | dot++; // move over word |
3702 | if (isspace(*dot)) { |
3703 | dot = skip_thing(dot, 2, FORWARD, S_OVER_WS); |
3704 | } |
3705 | break; |
3706 | case 'z': // z- |
3707 | c1 = get_one_char(); // get the replacement char |
3708 | cnt = 0; |
3709 | if (c1 == '.') |
3710 | cnt = (rows - 2) / 2; // put dot at center |
3711 | if (c1 == '-') |
3712 | cnt = rows - 2; // put dot at bottom |
3713 | screenbegin = begin_line(dot); // start dot at top |
3714 | dot_scroll(cnt, -1); |
3715 | break; |
3716 | case '|': // |- move to column "cmdcnt" |
3717 | dot = move_to_col(dot, cmdcnt - 1); // try to move to column |
3718 | break; |
3719 | case '~': // ~- flip the case of letters a-z -> A-Z |
3720 | if (cmdcnt-- > 1) { |
3721 | do_cmd(c); |
3722 | } // repeat cnt |
3723 | if (islower(*dot)) { |
3724 | *dot = toupper(*dot); |
3725 | file_modified++; |
3726 | } else if (isupper(*dot)) { |
3727 | *dot = tolower(*dot); |
3728 | file_modified++; |
3729 | } |
3730 | dot_right(); |
3731 | end_cmd_q(); // stop adding to q |
3732 | break; |
3733 | //----- The Cursor and Function Keys ----------------------------- |
3734 | case KEYCODE_HOME: // Cursor Key Home |
3735 | dot_begin(); |
3736 | break; |
3737 | // The Fn keys could point to do_macro which could translate them |
3738 | #if 0 |
3739 | case KEYCODE_FUN1: // Function Key F1 |
3740 | case KEYCODE_FUN2: // Function Key F2 |
3741 | case KEYCODE_FUN3: // Function Key F3 |
3742 | case KEYCODE_FUN4: // Function Key F4 |
3743 | case KEYCODE_FUN5: // Function Key F5 |
3744 | case KEYCODE_FUN6: // Function Key F6 |
3745 | case KEYCODE_FUN7: // Function Key F7 |
3746 | case KEYCODE_FUN8: // Function Key F8 |
3747 | case KEYCODE_FUN9: // Function Key F9 |
3748 | case KEYCODE_FUN10: // Function Key F10 |
3749 | case KEYCODE_FUN11: // Function Key F11 |
3750 | case KEYCODE_FUN12: // Function Key F12 |
3751 | break; |
3752 | #endif |
3753 | } |
3754 | |
3755 | dc1: |
3756 | // if text[] just became empty, add back an empty line |
3757 | if (end == text) { |
3758 | char_insert(text, '\n'); // start empty buf with dummy line |
3759 | dot = text; |
3760 | } |
3761 | // it is OK for dot to exactly equal to end, otherwise check dot validity |
3762 | if (dot != end) { |
3763 | dot = bound_dot(dot); // make sure "dot" is valid |
3764 | } |
3765 | #if ENABLE_FEATURE_VI_YANKMARK |
3766 | check_context(c); // update the current context |
3767 | #endif |
3768 | |
3769 | if (!isdigit(c)) |
3770 | cmdcnt = 0; // cmd was not a number, reset cmdcnt |
3771 | cnt = dot - begin_line(dot); |
3772 | // Try to stay off of the Newline |
3773 | if (*dot == '\n' && cnt > 0 && cmd_mode == 0) |
3774 | dot--; |
3775 | } |
3776 | |
3777 | /* NB! the CRASHME code is unmaintained, and doesn't currently build */ |
3778 | #if ENABLE_FEATURE_VI_CRASHME |
3779 | static int totalcmds = 0; |
3780 | static int Mp = 85; // Movement command Probability |
3781 | static int Np = 90; // Non-movement command Probability |
3782 | static int Dp = 96; // Delete command Probability |
3783 | static int Ip = 97; // Insert command Probability |
3784 | static int Yp = 98; // Yank command Probability |
3785 | static int Pp = 99; // Put command Probability |
3786 | static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0; |
3787 | static const char chars[20] = "\t012345 abcdABCD-=.$"; |
3788 | static const char *const words[20] = { |
3789 | "this", "is", "a", "test", |
3790 | "broadcast", "the", "emergency", "of", |
3791 | "system", "quick", "brown", "fox", |
3792 | "jumped", "over", "lazy", "dogs", |
3793 | "back", "January", "Febuary", "March" |
3794 | }; |
3795 | static const char *const lines[20] = { |
3796 | "You should have received a copy of the GNU General Public License\n", |
3797 | "char c, cm, *cmd, *cmd1;\n", |
3798 | "generate a command by percentages\n", |
3799 | "Numbers may be typed as a prefix to some commands.\n", |
3800 | "Quit, discarding changes!\n", |
3801 | "Forced write, if permission originally not valid.\n", |
3802 | "In general, any ex or ed command (such as substitute or delete).\n", |
3803 | "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n", |
3804 | "Please get w/ me and I will go over it with you.\n", |
3805 | "The following is a list of scheduled, committed changes.\n", |
3806 | "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n", |
3807 | "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n", |
3808 | "Any question about transactions please contact Sterling Huxley.\n", |
3809 | "I will try to get back to you by Friday, December 31.\n", |
3810 | "This Change will be implemented on Friday.\n", |
3811 | "Let me know if you have problems accessing this;\n", |
3812 | "Sterling Huxley recently added you to the access list.\n", |
3813 | "Would you like to go to lunch?\n", |
3814 | "The last command will be automatically run.\n", |
3815 | "This is too much english for a computer geek.\n", |
3816 | }; |
3817 | static char *multilines[20] = { |
3818 | "You should have received a copy of the GNU General Public License\n", |
3819 | "char c, cm, *cmd, *cmd1;\n", |
3820 | "generate a command by percentages\n", |
3821 | "Numbers may be typed as a prefix to some commands.\n", |
3822 | "Quit, discarding changes!\n", |
3823 | "Forced write, if permission originally not valid.\n", |
3824 | "In general, any ex or ed command (such as substitute or delete).\n", |
3825 | "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n", |
3826 | "Please get w/ me and I will go over it with you.\n", |
3827 | "The following is a list of scheduled, committed changes.\n", |
3828 | "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n", |
3829 | "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n", |
3830 | "Any question about transactions please contact Sterling Huxley.\n", |
3831 | "I will try to get back to you by Friday, December 31.\n", |
3832 | "This Change will be implemented on Friday.\n", |
3833 | "Let me know if you have problems accessing this;\n", |
3834 | "Sterling Huxley recently added you to the access list.\n", |
3835 | "Would you like to go to lunch?\n", |
3836 | "The last command will be automatically run.\n", |
3837 | "This is too much english for a computer geek.\n", |
3838 | }; |
3839 | |
3840 | // create a random command to execute |
3841 | static void crash_dummy() |
3842 | { |
3843 | static int sleeptime; // how long to pause between commands |
3844 | char c, cm, *cmd, *cmd1; |
3845 | int i, cnt, thing, rbi, startrbi, percent; |
3846 | |
3847 | // "dot" movement commands |
3848 | cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL"; |
3849 | |
3850 | // is there already a command running? |
3851 | if (readbuffer[0] > 0) |
3852 | goto cd1; |
3853 | cd0: |
3854 | readbuffer[0] = 'X'; |
3855 | startrbi = rbi = 1; |
3856 | sleeptime = 0; // how long to pause between commands |
3857 | memset(readbuffer, '\0', sizeof(readbuffer)); |
3858 | // generate a command by percentages |
3859 | percent = (int) lrand48() % 100; // get a number from 0-99 |
3860 | if (percent < Mp) { // Movement commands |
3861 | // available commands |
3862 | cmd = cmd1; |
3863 | M++; |
3864 | } else if (percent < Np) { // non-movement commands |
3865 | cmd = "mz<>\'\""; // available commands |
3866 | N++; |
3867 | } else if (percent < Dp) { // Delete commands |
3868 | cmd = "dx"; // available commands |
3869 | D++; |
3870 | } else if (percent < Ip) { // Inset commands |
3871 | cmd = "iIaAsrJ"; // available commands |
3872 | I++; |
3873 | } else if (percent < Yp) { // Yank commands |
3874 | cmd = "yY"; // available commands |
3875 | Y++; |
3876 | } else if (percent < Pp) { // Put commands |
3877 | cmd = "pP"; // available commands |
3878 | P++; |
3879 | } else { |
3880 | // We do not know how to handle this command, try again |
3881 | U++; |
3882 | goto cd0; |
3883 | } |
3884 | // randomly pick one of the available cmds from "cmd[]" |
3885 | i = (int) lrand48() % strlen(cmd); |
3886 | cm = cmd[i]; |
3887 | if (strchr(":\024", cm)) |
3888 | goto cd0; // dont allow colon or ctrl-T commands |
3889 | readbuffer[rbi++] = cm; // put cmd into input buffer |
3890 | |
3891 | // now we have the command- |
3892 | // there are 1, 2, and multi char commands |
3893 | // find out which and generate the rest of command as necessary |
3894 | if (strchr("dmryz<>\'\"", cm)) { // 2-char commands |
3895 | cmd1 = " \n\r0$^-+wWeEbBhjklHL"; |
3896 | if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[] |
3897 | cmd1 = "abcdefghijklmnopqrstuvwxyz"; |
3898 | } |
3899 | thing = (int) lrand48() % strlen(cmd1); // pick a movement command |
3900 | c = cmd1[thing]; |
3901 | readbuffer[rbi++] = c; // add movement to input buffer |
3902 | } |
3903 | if (strchr("iIaAsc", cm)) { // multi-char commands |
3904 | if (cm == 'c') { |
3905 | // change some thing |
3906 | thing = (int) lrand48() % strlen(cmd1); // pick a movement command |
3907 | c = cmd1[thing]; |
3908 | readbuffer[rbi++] = c; // add movement to input buffer |
3909 | } |
3910 | thing = (int) lrand48() % 4; // what thing to insert |
3911 | cnt = (int) lrand48() % 10; // how many to insert |
3912 | for (i = 0; i < cnt; i++) { |
3913 | if (thing == 0) { // insert chars |
3914 | readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))]; |
3915 | } else if (thing == 1) { // insert words |
3916 | strcat(readbuffer, words[(int) lrand48() % 20]); |
3917 | strcat(readbuffer, " "); |
3918 | sleeptime = 0; // how fast to type |
3919 | } else if (thing == 2) { // insert lines |
3920 | strcat(readbuffer, lines[(int) lrand48() % 20]); |
3921 | sleeptime = 0; // how fast to type |
3922 | } else { // insert multi-lines |
3923 | strcat(readbuffer, multilines[(int) lrand48() % 20]); |
3924 | sleeptime = 0; // how fast to type |
3925 | } |
3926 | } |
3927 | strcat(readbuffer, "\033"); |
3928 | } |
3929 | readbuffer[0] = strlen(readbuffer + 1); |
3930 | cd1: |
3931 | totalcmds++; |
3932 | if (sleeptime > 0) |
3933 | mysleep(sleeptime); // sleep 1/100 sec |
3934 | } |
3935 | |
3936 | // test to see if there are any errors |
3937 | static void crash_test() |
3938 | { |
3939 | static time_t oldtim; |
3940 | |
3941 | time_t tim; |
3942 | char d[2], msg[80]; |
3943 | |
3944 | msg[0] = '\0'; |
3945 | if (end < text) { |
3946 | strcat(msg, "end<text "); |
3947 | } |
3948 | if (end > textend) { |
3949 | strcat(msg, "end>textend "); |
3950 | } |
3951 | if (dot < text) { |
3952 | strcat(msg, "dot<text "); |
3953 | } |
3954 | if (dot > end) { |
3955 | strcat(msg, "dot>end "); |
3956 | } |
3957 | if (screenbegin < text) { |
3958 | strcat(msg, "screenbegin<text "); |
3959 | } |
3960 | if (screenbegin > end - 1) { |
3961 | strcat(msg, "screenbegin>end-1 "); |
3962 | } |
3963 | |
3964 | if (msg[0]) { |
3965 | printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s", |
3966 | totalcmds, last_input_char, msg, SOs, SOn); |
3967 | fflush_all(); |
3968 | while (safe_read(STDIN_FILENO, d, 1) > 0) { |
3969 | if (d[0] == '\n' || d[0] == '\r') |
3970 | break; |
3971 | } |
3972 | } |
3973 | tim = time(NULL); |
3974 | if (tim >= (oldtim + 3)) { |
3975 | sprintf(status_buffer, |
3976 | "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d", |
3977 | totalcmds, M, N, I, D, Y, P, U, end - text + 1); |
3978 | oldtim = tim; |
3979 | } |
3980 | } |
3981 | #endif |