2 * Line-editing routines
4 * Copyright 1992 Simmule Turner and Rich Salz. All rights reserved.
7 * This software is not subject to any license of the American Telephone
8 * and Telegraph Company or of the Regents of the University of California.
10 * Permission is granted to anyone to use this software for any purpose on
11 * any computer system, and to alter it and redistribute it freely, subject
12 * to the following restrictions:
13 * 1. The authors are not responsible for the consequences of use of this
14 * software, no matter how awful, even if they arise from flaws in it.
15 * 2. The origin of this software must not be misrepresented, either by
16 * explicit claim or by omission. Since few users ever read sources,
17 * credits must appear in the documentation.
18 * 3. Altered versions must be plainly marked as such, and must not be
19 * misrepresented as being the original software. Since few users
20 * ever read sources, credits must appear in the documentation.
21 * 4. This notice may not be removed or altered.
23 * The code was heavily simplified for inclusion in Wine. -- AJ
31 #include <sys/ioctl.h>
32 #include <sys/types.h>
35 typedef unsigned char CHAR;
38 ** Manifest constants.
40 #define SCREEN_WIDTH 80
41 #define SCREEN_ROWS 24
44 #define CTL(x) ((x) & 0x1F)
45 #define ISCTL(x) ((x) && (x) < ' ')
46 #define UNCTL(x) ((x) + 64)
47 #define META(x) ((x) | 0x80)
48 #define ISMETA(x) ((x) & 0x80)
49 #define UNMETA(x) ((x) & 0x7F)
50 #if !defined(HIST_SIZE)
52 #endif /* !defined(HIST_SIZE) */
55 #define SCREEN_INC 256
57 #define DISPOSE(p) free((char *)(p))
59 ((T *)malloc((unsigned int)(sizeof (T) * (c))))
60 #define RENEW(p, T, c) \
61 (p = (T *)realloc((char *)(p), (unsigned int)(sizeof (T) * (c))))
62 #define COPYFROMTO(new, p, len) \
63 (void)memcpy((char *)(new), (char *)(p), (int)(len))
66 ** Command status codes.
68 typedef enum _STATUS {
69 CSdone, CSeof, CSmove, CSdispatch, CSstay
73 ** The type of case-changing to perform.
80 ** Key to command mapping.
82 typedef struct _KEYMAP {
88 ** Command history structure.
90 typedef struct _HISTORY {
93 CHAR *Lines[HIST_SIZE];
104 static CHAR NIL[] = "";
105 static const CHAR *Input = NIL;
107 static const char *Prompt;
110 static char NEWLINE[]= CRLF;
120 static KEYMAP Map[33];
121 static KEYMAP MetaMap[16];
122 static size_t Length;
123 static size_t ScreenCount;
124 static size_t ScreenSize;
125 static char *backspace;
129 /* Display print 8-bit chars as `M-x' or as the actual 8-bit char? */
130 int rl_meta_chars = 1;
135 static CHAR *editinput();
138 #if defined(USE_TERMCAP)
139 extern char *getenv();
140 extern char *tgetstr();
141 extern int tgetent();
142 #endif /* defined(USE_TERMCAP) */
145 ** TTY input/output functions.
148 #ifdef HAVE_TCGETATTR
155 static struct termios old;
159 (void)tcgetattr(0, &old);
160 rl_erase = old.c_cc[VERASE];
161 rl_kill = old.c_cc[VKILL];
162 rl_eof = old.c_cc[VEOF];
163 rl_intr = old.c_cc[VINTR];
164 rl_quit = old.c_cc[VQUIT];
167 new.c_cc[VINTR] = -1;
168 new.c_cc[VQUIT] = -1;
169 new.c_lflag &= ~(ECHO | ICANON);
170 new.c_iflag &= ~(ISTRIP | INPCK);
173 (void)tcsetattr(0, TCSANOW, &new);
176 (void)tcsetattr(0, TCSANOW, &old);
179 #else /* HAVE_TCGETATTR */
185 static struct sgttyb old_sgttyb;
186 static struct tchars old_tchars;
187 struct sgttyb new_sgttyb;
188 struct tchars new_tchars;
191 (void)ioctl(0, TIOCGETP, &old_sgttyb);
192 rl_erase = old_sgttyb.sg_erase;
193 rl_kill = old_sgttyb.sg_kill;
195 (void)ioctl(0, TIOCGETC, &old_tchars);
196 rl_eof = old_tchars.t_eofc;
197 rl_intr = old_tchars.t_intrc;
198 rl_quit = old_tchars.t_quitc;
200 new_sgttyb = old_sgttyb;
201 new_sgttyb.sg_flags &= ~ECHO;
202 new_sgttyb.sg_flags |= RAW;
204 new_sgttyb.sg_flags |= PASS8;
205 #endif /* defined(PASS8) */
206 (void)ioctl(0, TIOCSETP, &new_sgttyb);
208 new_tchars = old_tchars;
209 new_tchars.t_intrc = -1;
210 new_tchars.t_quitc = -1;
211 (void)ioctl(0, TIOCSETC, &new_tchars);
214 (void)ioctl(0, TIOCSETP, &old_sgttyb);
215 (void)ioctl(0, TIOCSETC, &old_tchars);
219 #endif /* HAVE_TCGETATTR */
225 (void)write(1, Screen, ScreenCount);
234 Screen[ScreenCount] = c;
235 if (++ScreenCount >= ScreenSize - 1) {
236 ScreenSize += SCREEN_INC;
237 RENEW(Screen, char, ScreenSize);
261 else if (rl_meta_chars && ISMETA(c)) {
290 return read(0, &c, (size_t)1) == 1 ? c : EOF;
293 #define TTYback() (backspace ? TTYputs((CHAR *)backspace) : TTYput('\b'))
307 #if defined(USE_TERMCAP)
311 #endif /* defined(USE_TERMCAP) */
312 #if defined(TIOCGWINSZ)
314 #endif /* defined(TIOCGWINSZ) */
317 #if defined(TIOCGWINSZ)
318 /* Perhaps we got resized. */
319 if (ioctl(0, TIOCGWINSZ, &W) >= 0
320 && W.ws_col > 0 && W.ws_row > 0) {
321 TTYwidth = (int)W.ws_col;
322 TTYrows = (int)W.ws_row;
324 #endif /* defined(TIOCGWINSZ) */
329 TTYwidth = TTYrows = 0;
330 #if defined(USE_TERMCAP)
332 if ((term = getenv("TERM")) == NULL)
334 if (tgetent(buff, term) < 0) {
335 TTYwidth = SCREEN_WIDTH;
336 TTYrows = SCREEN_ROWS;
339 backspace = tgetstr("le", &bp);
340 TTYwidth = tgetnum("co");
341 TTYrows = tgetnum("li");
342 #endif /* defined(USE_TERMCAP) */
344 #if defined(TIOCGWINSZ)
345 if (ioctl(0, TIOCGWINSZ, &W) >= 0) {
346 TTYwidth = (int)W.ws_col;
347 TTYrows = (int)W.ws_row;
349 #endif /* defined(TIOCGWINSZ) */
351 if (TTYwidth <= 0 || TTYrows <= 0) {
352 TTYwidth = SCREEN_WIDTH;
353 TTYrows = SCREEN_ROWS;
366 TTYputs((CHAR *)Prompt);
367 for (i = Point, p = Line; --i >= 0; p++)
377 if (ISCTL(Line[Point - 1]))
379 else if (rl_meta_chars && ISMETA(Line[Point - 1])) {
384 if (Change == CSmove)
392 TTYshow(Line[Point]);
393 if (Change == CSmove)
416 if ((Input = (CHAR *)getenv((char *)name)) == NULL) {
433 for ( ; Point < End && (*p == ' ' || !isalnum(*p)); Point++, p++)
437 for (; Point < End && isalnum(*p); Point++, p++)
443 } while (++i < Repeat);
457 (void)do_forward(CSstay);
458 if (OldPoint != Point) {
459 if ((count = Point - OldPoint) < 0)
462 if ((end = Point + count) > End)
464 for (i = Point, p = &Line[i]; i < end; i++, p++) {
465 if (type == TOupper) {
469 else if (isupper(*p))
480 return do_case(TOlower);
486 return do_case(TOupper);
496 for (extras = 0, i = Point, p = &Line[i]; i <= End; i++, p++) {
502 else if (rl_meta_chars && ISMETA(*p)) {
509 for (i += extras; i > Point; i--)
516 Point = -strlen(Prompt);
533 len = strlen((char *)p);
534 if (End + len >= Length) {
535 if ((new = NEW(CHAR, Length + len + MEM_INC)) == NULL)
538 COPYFROMTO(new, Line, Length);
542 Length += len + MEM_INC;
545 for (q = &Line[Point], i = End - Point; --i >= 0; )
547 COPYFROMTO(&Line[Point], p, len);
550 TTYstring(&Line[Point]);
553 return Point == End ? CSstay : CSmove;
560 return H.Pos >= H.Size - 1 ? NULL : H.Lines[++H.Pos];
566 return H.Pos == 0 ? NULL : H.Lines[--H.Pos];
579 return insert_string(p);
591 if ((p = (*move)()) == NULL)
593 } while (++i < Repeat);
594 return do_insert_hist(p);
600 return do_hist(next_hist);
606 return do_hist(prev_hist);
612 return do_insert_hist(H.Lines[H.Pos = 0]);
618 return do_insert_hist(H.Lines[H.Pos = H.Size - 1]);
622 ** Return zero if pat appears as a substring in text.
625 substrcmp(text, pat, len)
632 if ((c = *pat) == '\0')
633 return *text == '\0';
634 for ( ; *text; text++)
635 if ((CHAR)*text == c && strncmp(text, pat, len) == 0)
641 search_hist(search, move)
645 static CHAR *old_search;
651 /* Save or get remembered search pattern. */
652 if (search && *search) {
655 old_search = (CHAR *)strdup((char *)search);
658 if (old_search == NULL || *old_search == '\0')
663 /* Set up pattern-finder. */
664 if (*search == '^') {
666 pat = (char *)(search + 1);
670 pat = (char *)search;
674 for (pos = H.Pos; (*move)() != NULL; )
675 if ((*match)((char *)H.Lines[H.Pos], pat, len) == 0)
676 return H.Lines[H.Pos];
684 static int Searching;
685 const char *old_prompt;
696 TTYputs((CHAR *)Prompt);
697 move = Repeat == NO_ARG ? prev_hist : next_hist;
698 p = search_hist(editinput(), move);
701 TTYputs((CHAR *)Prompt);
704 return do_insert_hist(p);
717 } while (++i < Repeat);
734 if ((Yanked = NEW(CHAR, (size_t)i + 1)) != NULL) {
735 COPYFROMTO(Yanked, &Line[begin], i);
747 if (count <= 0 || End == Point)
750 if (count == 1 && Point == End - 1) {
751 /* Optimize common case of delete at end of line. */
760 else if (rl_meta_chars && ISMETA(*p)) {
769 if (Point + count > End && (count = End - Point) <= 0)
773 save_yank(Point, count);
775 for (p = &Line[Point], i = End - (Point + count) + 1; --i >= 0; p++)
779 TTYstring(&Line[Point]);
793 } while (++i < Repeat);
808 } while (++i < Repeat);
810 return delete_string(i);
816 TTYputs((CHAR *)NEWLINE);
817 TTYputs((CHAR *)Prompt);
827 if (Repeat != NO_ARG) {
828 if (Repeat < Point) {
832 (void)delete_string(i - Point);
834 else if (Repeat > Point) {
836 (void)delete_string(Repeat - Point - 1);
841 save_yank(Point, End - Point);
858 if (Repeat == NO_ARG || Repeat < 2) {
861 return insert_string(buff);
864 if ((p = NEW(CHAR, Repeat + 1)) == NULL)
866 for (i = Repeat, q = p; --i >= 0; )
870 s = insert_string(p);
881 if ((c = TTYget()) == EOF)
883 /* Also include VT-100 arrows. */
884 if (c == '[' || c == 'O')
885 switch (c = TTYget()) {
886 default: return ring_bell();
887 case EOF: return CSeof;
888 case 'A': return h_prev();
889 case 'B': return h_next();
890 case 'C': return fd_char();
891 case 'D': return bk_char();
895 for (Repeat = c - '0'; (c = TTYget()) != EOF && isdigit(c); )
896 Repeat = Repeat * 10 + c - '0';
904 for (OldPoint = Point, kp = MetaMap; kp->Function; kp++)
906 return (*kp->Function)();
920 PushBack = UNMETA(c);
923 for (kp = Map; kp->Function; kp++)
926 s = kp->Function ? (*kp->Function)() : insert_char((int)c);
928 /* No pushback means no repeat count; hacky, but true. */
940 if (c == rl_erase || c == DEL)
941 return bk_del_char();
950 if (c == rl_intr || c == rl_quit) {
955 if (c == rl_eof && Point == 0 && End == 0)
967 OldPoint = Point = Mark = End = 0;
970 while ((c = TTYget()) != EOF)
971 switch (TTYspecial(c)) {
1005 if ((p = (CHAR *)strdup((char *)p)) == NULL)
1007 if (H.Size < HIST_SIZE)
1008 H.Lines[H.Size++] = p;
1010 DISPOSE(H.Lines[0]);
1011 for (i = 0; i < HIST_SIZE - 1; i++)
1012 H.Lines[i] = H.Lines[i + 1];
1026 if ((Line = NEW(CHAR, Length)) == NULL)
1033 ScreenSize = SCREEN_INC;
1034 Screen = NEW(char, ScreenSize);
1035 Prompt = prompt ? prompt : (char *)NIL;
1036 TTYputs((CHAR *)Prompt);
1037 if ((line = editinput()) != NULL) {
1038 line = (CHAR *)strdup((char *)line);
1039 TTYputs((CHAR *)NEWLINE);
1044 DISPOSE(H.Lines[--H.Size]);
1045 return (char *)line;
1052 if (p == NULL || *p == '\0')
1055 #if defined(UNIQUE_HISTORY)
1056 if (H.Pos && strcmp(p, H.Lines[H.Pos - 1]) == 0)
1058 #endif /* defined(UNIQUE_HISTORY) */
1059 hist_add((CHAR *)p);
1076 return delete_string(Repeat == NO_ARG ? 1 : Repeat);
1104 c = Line[Point - 1];
1106 Line[Point - 1] = Line[Point];
1107 TTYshow(Line[Point - 1]);
1119 return (c = TTYget()) == EOF ? CSeof : insert_char((int)c);
1137 return delete_string(Mark - Point);
1152 if ((c = TTYget()) != CTL('X'))
1153 return c == EOF ? CSeof : ring_bell();
1155 if ((c = Mark) <= End) {
1166 if (Yanked && *Yanked)
1167 return insert_string(Yanked);
1178 save_yank(Mark, Point - Mark);
1180 save_yank(Point, Mark - Point);
1192 if ((c = TTYget()) == EOF)
1194 for (i = Point + 1, p = &Line[i]; i < End; i++, p++)
1205 return do_forward(CSmove);
1213 (void)do_forward(CSstay);
1214 if (OldPoint != Point) {
1215 i = Point - OldPoint;
1217 return delete_string(i);
1230 for (p = &Line[Point]; p > Line && !isalnum(p[-1]); p--)
1233 for (; p > Line && p[-1] != ' ' && isalnum(p[-1]); p--)
1238 } while (++i < Repeat);
1247 if (OldPoint != Point)
1248 return delete_string(OldPoint - Point);
1264 if ((*avp = p = NEW(CHAR*, i))== NULL)
1267 for (c = line; isspace(*c); c++)
1269 if (*c == '\n' || *c == '\0')
1272 for (ac = 0, p[ac++] = c; *c && *c != '\n'; ) {
1275 if (*c && *c != '\n') {
1277 new = NEW(CHAR*, i + MEM_INC);
1282 COPYFROMTO(new, p, i * sizeof (char **));
1306 if (H.Size == 1 || (p = H.Lines[H.Size - 2]) == NULL)
1309 if ((p = (CHAR *)strdup((char *)p)) == NULL)
1311 ac = argify(p, &av);
1313 if (Repeat != NO_ARG)
1314 s = Repeat < ac ? insert_string(av[Repeat]) : ring_bell();
1316 s = ac ? insert_string(av[ac - 1]) : CSstay;
1324 static KEYMAP Map[33] = {
1325 { CTL('@'), ring_bell },
1326 { CTL('A'), beg_line },
1327 { CTL('B'), bk_char },
1328 { CTL('D'), del_char },
1329 { CTL('E'), end_line },
1330 { CTL('F'), fd_char },
1331 { CTL('G'), ring_bell },
1332 { CTL('H'), bk_del_char },
1333 { CTL('I'), ring_bell },
1334 { CTL('J'), accept_line },
1335 { CTL('K'), kill_line },
1336 { CTL('L'), redisplay },
1337 { CTL('M'), accept_line },
1338 { CTL('N'), h_next },
1339 { CTL('O'), ring_bell },
1340 { CTL('P'), h_prev },
1341 { CTL('Q'), ring_bell },
1342 { CTL('R'), h_search },
1343 { CTL('S'), ring_bell },
1344 { CTL('T'), transpose },
1345 { CTL('U'), ring_bell },
1346 { CTL('V'), quote },
1348 { CTL('X'), exchange },
1350 { CTL('Z'), ring_bell },
1352 { CTL(']'), move_to_char },
1353 { CTL('^'), ring_bell },
1354 { CTL('_'), ring_bell },
1358 static KEYMAP MetaMap[16]= {
1359 { CTL('H'), bk_kill_word },
1360 { DEL, bk_kill_word },
1362 { '.', last_argument },
1367 { 'd', fd_kill_word },
1369 { 'l', case_down_word },
1370 { 'u', case_up_word },
1372 { 'w', copy_region },