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
33 #include <sys/ioctl.h>
34 #include <sys/types.h>
42 ** Manifest constants.
44 #define SCREEN_WIDTH 80
45 #define SCREEN_ROWS 24
48 #define CTL(x) ((x) & 0x1F)
49 #define ISCTL(x) ((x) && (x) < ' ')
50 #define UNCTL(x) ((x) + 64)
51 #define META(x) ((x) | 0x80)
52 #define ISMETA(x) ((x) & 0x80)
53 #define UNMETA(x) ((x) & 0x7F)
54 #if !defined(HIST_SIZE)
56 #endif /* !defined(HIST_SIZE) */
59 #define SCREEN_INC 256
61 #define DISPOSE(p) DBG_free((char *)(p))
63 ((T *)DBG_alloc((unsigned int)(sizeof (T) * (c))))
64 #define RENEW(p, T, c) \
65 (p = (T *)DBG_realloc((char *)(p), (unsigned int)(sizeof (T) * (c))))
66 #define COPYFROMTO(new, p, len) \
67 (void)memcpy((char *)(new), (char *)(p), (int)(len))
70 ** Command status codes.
72 typedef enum _STATUS {
73 CSdone, CSeof, CSmove, CSdispatch, CSstay
77 ** The type of case-changing to perform.
84 ** Key to command mapping.
86 typedef struct _KEYMAP {
92 ** Command history structure.
94 typedef struct _HISTORY {
97 CHAR *Lines[HIST_SIZE];
108 static CHAR NIL[] = "";
109 static const CHAR *Input = NIL;
111 static const char *Prompt;
114 static char NEWLINE[]= CRLF;
124 static KEYMAP Map[33];
125 static KEYMAP MetaMap[16];
126 static size_t Length;
127 static size_t ScreenCount;
128 static size_t ScreenSize;
129 static char *backspace;
133 /* Display print 8-bit chars as `M-x' or as the actual 8-bit char? */
134 int rl_meta_chars = 1;
139 static CHAR *editinput();
142 #if defined(USE_TERMCAP)
143 extern char *getenv();
144 extern char *tgetstr();
145 extern int tgetent();
146 #endif /* defined(USE_TERMCAP) */
149 ** TTY input/output functions.
152 #ifdef HAVE_TCGETATTR
158 static struct termios old;
162 (void)tcgetattr(0, &old);
163 rl_erase = old.c_cc[VERASE];
164 rl_kill = old.c_cc[VKILL];
165 rl_eof = old.c_cc[VEOF];
166 rl_intr = old.c_cc[VINTR];
167 rl_quit = old.c_cc[VQUIT];
170 new.c_cc[VINTR] = -1;
171 new.c_cc[VQUIT] = -1;
172 new.c_lflag &= ~(ECHO | ICANON);
173 new.c_iflag &= ~(ISTRIP | INPCK);
176 (void)tcsetattr(0, TCSANOW, &new);
179 (void)tcsetattr(0, TCSANOW, &old);
182 #else /* HAVE_TCGETATTR */
187 static struct sgttyb old_sgttyb;
188 static struct tchars old_tchars;
189 struct sgttyb new_sgttyb;
190 struct tchars new_tchars;
193 (void)ioctl(0, TIOCGETP, &old_sgttyb);
194 rl_erase = old_sgttyb.sg_erase;
195 rl_kill = old_sgttyb.sg_kill;
197 (void)ioctl(0, TIOCGETC, &old_tchars);
198 rl_eof = old_tchars.t_eofc;
199 rl_intr = old_tchars.t_intrc;
200 rl_quit = old_tchars.t_quitc;
202 new_sgttyb = old_sgttyb;
203 new_sgttyb.sg_flags &= ~ECHO;
204 new_sgttyb.sg_flags |= RAW;
206 new_sgttyb.sg_flags |= PASS8;
207 #endif /* defined(PASS8) */
208 (void)ioctl(0, TIOCSETP, &new_sgttyb);
210 new_tchars = old_tchars;
211 new_tchars.t_intrc = -1;
212 new_tchars.t_quitc = -1;
213 (void)ioctl(0, TIOCSETC, &new_tchars);
216 (void)ioctl(0, TIOCSETP, &old_sgttyb);
217 (void)ioctl(0, TIOCSETC, &old_tchars);
221 #endif /* HAVE_TCGETATTR */
227 (void)write(1, Screen, ScreenCount);
235 Screen[ScreenCount] = c;
236 if (++ScreenCount >= ScreenSize - 1) {
237 ScreenSize += SCREEN_INC;
238 RENEW(Screen, char, ScreenSize);
260 else if (rl_meta_chars && ISMETA(c)) {
290 while ( ( retv = read( 0, &c, (size_t)1 ) ) == -1 )
292 if ( errno != EINTR )
299 return retv == 1 ? c : EOF;
302 #define TTYback() (backspace ? TTYputs((CHAR *)backspace) : TTYput('\b'))
315 #if defined(USE_TERMCAP)
319 #endif /* defined(USE_TERMCAP) */
320 #if defined(TIOCGWINSZ)
322 #endif /* defined(TIOCGWINSZ) */
325 #if defined(TIOCGWINSZ)
326 /* Perhaps we got resized. */
327 if (ioctl(0, TIOCGWINSZ, &W) >= 0
328 && W.ws_col > 0 && W.ws_row > 0) {
329 TTYwidth = (int)W.ws_col;
330 TTYrows = (int)W.ws_row;
332 #endif /* defined(TIOCGWINSZ) */
337 TTYwidth = TTYrows = 0;
338 #if defined(USE_TERMCAP)
340 if ((term = getenv("TERM")) == NULL)
342 if (tgetent(buff, term) < 0) {
343 TTYwidth = SCREEN_WIDTH;
344 TTYrows = SCREEN_ROWS;
347 backspace = tgetstr("le", &bp);
348 TTYwidth = tgetnum("co");
349 TTYrows = tgetnum("li");
350 #endif /* defined(USE_TERMCAP) */
352 #if defined(TIOCGWINSZ)
353 if (ioctl(0, TIOCGWINSZ, &W) >= 0) {
354 TTYwidth = (int)W.ws_col;
355 TTYrows = (int)W.ws_row;
357 #endif /* defined(TIOCGWINSZ) */
359 if (TTYwidth <= 0 || TTYrows <= 0) {
360 TTYwidth = SCREEN_WIDTH;
361 TTYrows = SCREEN_ROWS;
374 TTYputs((CHAR *)Prompt);
375 for (i = Point, p = Line; --i >= 0; p++)
384 if (ISCTL(Line[Point - 1]))
386 else if (rl_meta_chars && ISMETA(Line[Point - 1])) {
391 if (Change == CSmove)
398 TTYshow(Line[Point]);
399 if (Change == CSmove)
412 do_macro(unsigned int c)
421 if ((Input = (CHAR *)getenv((char *)name)) == NULL) {
429 do_forward(STATUS move)
437 for ( ; Point < End && (*p == ' ' || !isalnum(*p)); Point++, p++)
441 for (; Point < End && isalnum(*p); Point++, p++)
447 } while (++i < Repeat);
460 (void)do_forward(CSstay);
461 if (OldPoint != Point) {
462 if ((count = Point - OldPoint) < 0)
465 if ((end = Point + count) > End)
467 for (i = Point, p = &Line[i]; i < end; i++, p++) {
468 if (type == TOupper) {
472 else if (isupper(*p))
483 return do_case(TOlower);
489 return do_case(TOupper);
499 for (extras = 0, i = Point, p = &Line[i]; i <= End; i++, p++) {
505 else if (rl_meta_chars && ISMETA(*p)) {
512 for (i += extras; i > Point; i--)
519 Point = -strlen(Prompt);
528 insert_string(CHAR *p)
535 len = strlen((char *)p);
536 if (End + len >= Length) {
537 if ((new = NEW(CHAR, Length + len + MEM_INC)) == NULL)
540 COPYFROMTO(new, Line, Length);
544 Length += len + MEM_INC;
547 for (q = &Line[Point], i = End - Point; --i >= 0; )
549 COPYFROMTO(&Line[Point], p, len);
552 TTYstring(&Line[Point]);
555 return Point == End ? CSstay : CSmove;
562 return H.Pos >= H.Size - 1 ? NULL : H.Lines[++H.Pos];
568 return H.Pos == 0 ? NULL : H.Lines[--H.Pos];
572 do_insert_hist(CHAR *p)
580 return insert_string(p);
584 do_hist(CHAR *(*move)(void))
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(char *text, char *pat, int len)
629 if ((c = *pat) == '\0')
630 return *text == '\0';
631 for ( ; *text; text++)
632 if ((CHAR)*text == c && strncmp(text, pat, len) == 0)
638 search_hist(CHAR *search, CHAR *(*move)(void))
640 static CHAR *old_search;
646 /* Save or get remembered search pattern. */
647 if (search && *search) {
650 old_search = (CHAR *)DBG_strdup((char *)search);
653 if (old_search == NULL || *old_search == '\0')
658 /* Set up pattern-finder. */
659 if (*search == '^') {
661 pat = (char *)(search + 1);
665 pat = (char *)search;
669 for (pos = H.Pos; (*move)() != NULL; )
670 if ((*match)((char *)H.Lines[H.Pos], pat, len) == 0)
671 return H.Lines[H.Pos];
679 static int Searching;
680 const char *old_prompt;
691 TTYputs((CHAR *)Prompt);
692 move = Repeat == NO_ARG ? prev_hist : next_hist;
693 p = search_hist(editinput(), move);
696 TTYputs((CHAR *)Prompt);
699 return do_insert_hist(p);
712 } while (++i < Repeat);
717 save_yank(int begin, int i)
727 if ((Yanked = NEW(CHAR, (size_t)i + 1)) != NULL) {
728 COPYFROMTO(Yanked, &Line[begin], i);
734 delete_string(int count)
739 if (count <= 0 || End == Point)
742 if (count == 1 && Point == End - 1) {
743 /* Optimize common case of delete at end of line. */
752 else if (rl_meta_chars && ISMETA(*p)) {
761 if (Point + count > End && (count = End - Point) <= 0)
765 save_yank(Point, count);
767 for (p = &Line[Point], i = End - (Point + count) + 1; --i >= 0; p++)
771 TTYstring(&Line[Point]);
785 } while (++i < Repeat);
800 } while (++i < Repeat);
802 return delete_string(i);
808 TTYputs((CHAR *)NEWLINE);
809 TTYputs((CHAR *)Prompt);
819 if (Repeat != NO_ARG) {
820 if (Repeat < Point) {
824 (void)delete_string(i - Point);
826 else if (Repeat > Point) {
828 (void)delete_string(Repeat - Point - 1);
833 save_yank(Point, End - Point);
849 if (Repeat == NO_ARG || Repeat < 2) {
852 return insert_string(buff);
855 if ((p = NEW(CHAR, Repeat + 1)) == NULL)
857 for (i = Repeat, q = p; --i >= 0; )
861 s = insert_string(p);
872 if ((c = TTYget()) == EOF)
874 /* Also include VT-100 arrows. */
875 if (c == '[' || c == 'O')
876 switch (c = TTYget()) {
877 default: return ring_bell();
878 case EOF: return CSeof;
879 case 'A': return h_prev();
880 case 'B': return h_next();
881 case 'C': return fd_char();
882 case 'D': return bk_char();
886 for (Repeat = c - '0'; (c = TTYget()) != EOF && isdigit(c); )
887 Repeat = Repeat * 10 + c - '0';
895 for (OldPoint = Point, kp = MetaMap; kp->Function; kp++)
897 return (*kp->Function)();
903 emacs(unsigned int c)
910 PushBack = UNMETA(c);
913 for (kp = Map; kp->Function; kp++)
916 s = kp->Function ? (*kp->Function)() : insert_char((int)c);
918 /* No pushback means no repeat count; hacky, but true. */
924 TTYspecial(unsigned int c)
929 if (c == rl_erase || c == DEL)
930 return bk_del_char();
939 if (c == rl_intr || c == rl_quit) {
944 if (c == rl_eof && Point == 0 && End == 0)
956 OldPoint = Point = Mark = End = 0;
959 while ((c = TTYget()) != EOF)
960 switch (TTYspecial(c)) {
993 if ((p = (CHAR *)DBG_strdup((char *)p)) == NULL)
995 if (H.Size < HIST_SIZE)
996 H.Lines[H.Size++] = p;
999 for (i = 0; i < HIST_SIZE - 1; i++)
1000 H.Lines[i] = H.Lines[i + 1];
1007 readline(const char *prompt)
1013 if ((Line = NEW(CHAR, Length)) == NULL)
1020 ScreenSize = SCREEN_INC;
1021 Screen = NEW(char, ScreenSize);
1022 Prompt = prompt ? prompt : (char *)NIL;
1023 TTYputs((CHAR *)Prompt);
1024 if ((line = editinput()) != NULL) {
1025 line = (CHAR *)DBG_strdup((char *)line);
1026 TTYputs((CHAR *)NEWLINE);
1031 DISPOSE(H.Lines[--H.Size]);
1032 return (char *)line;
1036 add_history(char *p)
1038 if (p == NULL || *p == '\0')
1041 #if defined(UNIQUE_HISTORY)
1042 if (H.Pos && strcmp(p, H.Lines[H.Pos - 1]) == 0)
1044 #endif /* defined(UNIQUE_HISTORY) */
1045 hist_add((CHAR *)p);
1062 return delete_string(Repeat == NO_ARG ? 1 : Repeat);
1090 c = Line[Point - 1];
1092 Line[Point - 1] = Line[Point];
1093 TTYshow(Line[Point - 1]);
1105 return (c = TTYget()) == EOF ? CSeof : insert_char((int)c);
1123 return delete_string(Mark - Point);
1138 if ((c = TTYget()) != CTL('X'))
1139 return c == EOF ? CSeof : ring_bell();
1141 if ((c = Mark) <= End) {
1152 if (Yanked && *Yanked)
1153 return insert_string(Yanked);
1164 save_yank(Mark, Point - Mark);
1166 save_yank(Point, Mark - Point);
1178 if ((c = TTYget()) == EOF)
1180 for (i = Point + 1, p = &Line[i]; i < End; i++, p++)
1191 return do_forward(CSmove);
1199 (void)do_forward(CSstay);
1200 if (OldPoint != Point) {
1201 i = Point - OldPoint;
1203 return delete_string(i);
1216 for (p = &Line[Point]; p > Line && !isalnum(p[-1]); p--)
1219 for (; p > Line && p[-1] != ' ' && isalnum(p[-1]); p--)
1224 } while (++i < Repeat);
1233 if (OldPoint != Point)
1234 return delete_string(OldPoint - Point);
1239 argify(CHAR *line, CHAR ***avp)
1248 if ((*avp = p = NEW(CHAR*, i))== NULL)
1251 for (c = line; isspace(*c); c++)
1253 if (*c == '\n' || *c == '\0')
1256 for (ac = 0, p[ac++] = c; *c && *c != '\n'; ) {
1259 if (*c && *c != '\n') {
1261 new = NEW(CHAR*, i + MEM_INC);
1266 COPYFROMTO(new, p, i * sizeof (char **));
1290 if (H.Size == 1 || (p = H.Lines[H.Size - 2]) == NULL)
1293 if ((p = (CHAR *)DBG_strdup((char *)p)) == NULL)
1295 ac = argify(p, &av);
1297 if (Repeat != NO_ARG)
1298 s = Repeat < ac ? insert_string(av[Repeat]) : ring_bell();
1300 s = ac ? insert_string(av[ac - 1]) : CSstay;
1308 static KEYMAP Map[33] = {
1309 { CTL('@'), ring_bell },
1310 { CTL('A'), beg_line },
1311 { CTL('B'), bk_char },
1312 { CTL('D'), del_char },
1313 { CTL('E'), end_line },
1314 { CTL('F'), fd_char },
1315 { CTL('G'), ring_bell },
1316 { CTL('H'), bk_del_char },
1317 { CTL('I'), ring_bell },
1318 { CTL('J'), accept_line },
1319 { CTL('K'), kill_line },
1320 { CTL('L'), redisplay },
1321 { CTL('M'), accept_line },
1322 { CTL('N'), h_next },
1323 { CTL('O'), ring_bell },
1324 { CTL('P'), h_prev },
1325 { CTL('Q'), ring_bell },
1326 { CTL('R'), h_search },
1327 { CTL('S'), ring_bell },
1328 { CTL('T'), transpose },
1329 { CTL('U'), ring_bell },
1330 { CTL('V'), quote },
1332 { CTL('X'), exchange },
1334 { CTL('Z'), ring_bell },
1336 { CTL(']'), move_to_char },
1337 { CTL('^'), ring_bell },
1338 { CTL('_'), ring_bell },
1342 static KEYMAP MetaMap[16]= {
1343 { CTL('H'), bk_kill_word },
1344 { DEL, bk_kill_word },
1346 { '.', last_argument },
1351 { 'd', fd_kill_word },
1353 { 'l', case_down_word },
1354 { 'u', case_up_word },
1356 { 'w', copy_region },