2 * Copyright (c) 1997 The NetBSD Foundation, Inc.
5 * This code is derived from software contributed to The NetBSD Foundation
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
29 * $NetBSD: readline.c,v 1.75 2008/04/29 06:53:01 martin Exp $
30 * $DragonFly: src/lib/libedit/readline.c,v 1.5 2008/09/30 16:57:05 swildner Exp $
35 #include <sys/types.h>
57 #include "fcns.h" /* for EL_NUM_FCNS */
59 #include "readline/readline.h"
60 #include "filecomplete.h"
62 void rl_prep_terminal(int);
63 void rl_deprep_terminal(void);
65 /* for rl_complete() */
68 /* see comment at the #ifdef for sense of this */
69 /* #define GDB_411_HACK */
71 /* readline compatibility stuff - look at readline sources/documentation */
72 /* to see what these variables mean */
73 const char *rl_library_version = "EditLine wrapper";
74 static char empty[] = { '\0' };
75 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' };
76 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$',
77 '>', '<', '=', ';', '|', '&', '{', '(', '\0' };
78 char *rl_readline_name = empty;
79 FILE *rl_instream = NULL;
80 FILE *rl_outstream = NULL;
83 char *rl_line_buffer = NULL;
84 VCPFunction *rl_linefunc = NULL;
86 VFunction *rl_event_hook = NULL;
87 KEYMAP_ENTRY_ARRAY emacs_standard_keymap,
91 int history_base = 1; /* probably never subject to change */
92 int history_length = 0;
93 int max_input_history = 0;
94 char history_expansion_char = '!';
95 char history_subst_char = '^';
96 char *history_no_expand_chars = expand_chars;
97 Function *history_inhibit_expansion_function = NULL;
98 char *history_arg_extract(int start, int end, const char *str);
100 int rl_inhibit_completion = 0;
101 int rl_attempted_completion_over = 0;
102 char *rl_basic_word_break_characters = break_chars;
103 char *rl_completer_word_break_characters = NULL;
104 char *rl_completer_quote_characters = NULL;
105 char *(* rl_completion_word_break_hook)(void) = NULL;
106 Function *rl_completion_entry_function = NULL;
107 CPPFunction *rl_attempted_completion_function = NULL;
108 Function *rl_pre_input_hook = NULL;
109 Function *rl_startup1_hook = NULL;
110 int (*rl_getc_function)(FILE *) = NULL;
111 char *rl_terminal_name = NULL;
112 int rl_already_prompted = 0;
113 int rl_filename_completion_desired = 0;
114 int rl_ignore_completion_duplicates = 0;
115 int rl_catch_signals = 1;
116 int readline_echoing_p = 1;
117 int _rl_print_completions_horizontally = 0;
118 VFunction *rl_redisplay_function = NULL;
119 Function *rl_startup_hook = NULL;
120 VFunction *rl_completion_display_matches_hook = NULL;
121 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal;
122 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal;
125 * The current prompt string.
127 char *rl_prompt = NULL;
129 * This is set to character indicating type of completion being done by
130 * rl_complete_internal(); this is available for application completion
133 int rl_completion_type = 0;
136 * If more than this number of items results from query for possible
137 * completions, we ask user if they are sure to really display the list.
139 int rl_completion_query_items = 100;
142 * List of characters which are word break characters, but should be left
143 * in the parsed text when it is passed to the completion function.
144 * Shell uses this to help determine what kind of completing to do.
146 char *rl_special_prefixes = NULL;
149 * This is the character appended to the completed words if at the end of
150 * the line. Default is ' ' (a space).
152 int rl_completion_append_character = ' ';
154 /* stuff below is used internally by libedit for readline emulation */
156 static History *h = NULL;
157 static EditLine *e = NULL;
158 static Function *map[256];
159 static jmp_buf topbuf;
161 /* internal functions */
162 static unsigned char _el_rl_complete(EditLine *, int);
163 static unsigned char _el_rl_tstp(EditLine *, int);
164 static char *_get_prompt(EditLine *);
165 static int _getc_function(EditLine *, char *);
166 static HIST_ENTRY *_move_history(int);
167 static int _history_expand_command(const char *, size_t, size_t,
169 static char *_rl_compat_sub(const char *, const char *,
171 static int _rl_event_read_char(EditLine *, char *);
172 static void _rl_update_pos(void);
177 _get_prompt(EditLine *el __attribute__((__unused__)))
179 rl_already_prompted = 1;
185 * generic function for moving around history
188 _move_history(int op)
191 static HIST_ENTRY rl_he;
193 if (history(h, &ev, op) != 0)
204 * read one key from user defined input function
208 _getc_function(EditLine *el, char *c)
212 i = (*rl_getc_function)(NULL);
221 * READLINE compatibility stuff
225 * initialize rl compat stuff
243 rl_outstream = stdout;
246 * See if we don't really want to run the editor
248 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0)
251 e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr);
254 el_set(e, EL_EDITMODE, 0);
260 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */
262 max_input_history = INT_MAX;
263 el_set(e, EL_HIST, history, h);
265 /* setup getc function if valid */
266 if (rl_getc_function)
267 el_set(e, EL_GETCFN, _getc_function);
269 /* for proper prompt printing in readline() */
270 rl_prompt = strdup("");
271 if (rl_prompt == NULL) {
276 el_set(e, EL_PROMPT, _get_prompt);
277 el_set(e, EL_SIGNAL, rl_catch_signals);
279 /* set default mode to "emacs"-style and read setting afterwards */
280 /* so this can be overriden */
281 el_set(e, EL_EDITOR, "emacs");
282 if (rl_terminal_name != NULL)
283 el_set(e, EL_TERMINAL, rl_terminal_name);
285 el_get(e, EL_TERMINAL, &rl_terminal_name);
288 * Word completion - this has to go AFTER rebinding keys
291 el_set(e, EL_ADDFN, "rl_complete",
292 "ReadLine compatible completion function",
294 el_set(e, EL_BIND, "^I", "rl_complete", NULL);
297 * Send TSTP when ^Z is pressed.
299 el_set(e, EL_ADDFN, "rl_tstp",
300 "ReadLine compatible suspend function",
302 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL);
304 /* read settings from configuration file */
308 * Unfortunately, some applications really do use rl_point
309 * and rl_line_buffer directly.
312 /* a cheesy way to get rid of const cast. */
313 rl_line_buffer = memchr(li->buffer, *li->buffer, 1);
317 (*rl_startup_hook)(NULL, 0);
324 * read one line from input stream and return it, chomping
325 * trailing newline (if there is any)
328 readline(const char *p)
331 const char * volatile prompt = p;
335 static int used_event_hook;
337 if (e == NULL || h == NULL)
342 (void)setjmp(topbuf);
344 /* update prompt accordingly to what has been passed */
347 if (strcmp(rl_prompt, prompt) != 0) {
349 rl_prompt = strdup(prompt);
350 if (rl_prompt == NULL)
354 if (rl_pre_input_hook)
355 (*rl_pre_input_hook)(NULL, 0);
357 if (rl_event_hook && !(e->el_flags&NO_TTY)) {
358 el_set(e, EL_GETCFN, _rl_event_read_char);
362 if (!rl_event_hook && used_event_hook) {
363 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN);
367 rl_already_prompted = 0;
369 /* get one line from input stream */
370 ret = el_gets(e, &count);
372 if (ret && count > 0) {
379 if (buf[lastidx] == '\n')
384 history(h, &ev, H_GETSIZE);
385 history_length = ev.num;
395 * is normally called before application starts to use
396 * history expansion functions
401 if (h == NULL || e == NULL)
407 * substitute ``what'' with ``with'', returning resulting string; if
408 * globally == 1, substitutes all occurrences of what, otherwise only the
412 _rl_compat_sub(const char *str, const char *what, const char *with,
417 size_t len, with_len, what_len;
420 with_len = strlen(with);
421 what_len = strlen(what);
423 /* calculate length we need for result */
426 if (*s == *what && !strncmp(s, what, what_len)) {
427 len += with_len - what_len;
434 r = result = malloc(len + 1);
439 if (*s == *what && !strncmp(s, what, what_len)) {
440 (void)strncpy(r, with, with_len);
454 static char *last_search_pat; /* last !?pat[?] search pattern */
455 static char *last_search_match; /* last !?pat[?] that matched */
458 get_history_event(const char *cmd, int *cindex, int qchar)
460 int idx, sign, sub, num, begin, ret;
467 if (cmd[idx++] != history_expansion_char)
470 /* find out which event to take */
471 if (cmd[idx] == history_expansion_char || cmd[idx] == 0) {
472 if (history(h, &ev, H_FIRST) != 0)
474 *cindex = cmd[idx]? (idx + 1):idx;
478 if (cmd[idx] == '-') {
483 if ('0' <= cmd[idx] && cmd[idx] <= '9') {
487 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') {
488 num = num * 10 + cmd[idx] - '0';
492 num = history_length - num + 1;
494 if (!(rl_he = history_get(num)))
501 if (cmd[idx] == '?') {
507 if (cmd[idx] == '\n')
509 if (sub && cmd[idx] == '?')
511 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' '
512 || cmd[idx] == '\t' || cmd[idx] == qchar))
517 if (sub && cmd[idx] == '?')
519 if (sub && len == 0 && last_search_pat && *last_search_pat)
520 pat = last_search_pat;
524 if ((pat = malloc(len + 1)) == NULL)
526 (void)strncpy(pat, cmd + begin, len);
530 if (history(h, &ev, H_CURR) != 0) {
531 if (pat != last_search_pat)
538 if (pat != last_search_pat) {
540 free(last_search_pat);
541 last_search_pat = pat;
543 ret = history_search(pat, -1);
545 ret = history_search_prefix(pat, -1);
548 /* restore to end of list on failed search */
549 history(h, &ev, H_FIRST);
550 (void)fprintf(rl_outstream, "%s: Event not found\n", pat);
551 if (pat != last_search_pat)
557 if (last_search_match && last_search_match != pat)
558 free(last_search_match);
559 last_search_match = pat;
562 if (pat != last_search_pat)
565 if (history(h, &ev, H_CURR) != 0)
570 /* roll back to original position */
571 (void)history(h, &ev, H_SET, num);
577 * the real function doing history expansion - takes as argument command
578 * to do and data upon which the command should be executed
579 * does expansion the way I've understood readline documentation
581 * returns 0 if data was not modified, 1 if it was and 2 if the string
582 * should be only printed and not executed; in case of error,
583 * returns -1 and *result points to NULL
584 * it's callers responsibility to free() string returned in *result
587 _history_expand_command(const char *command, size_t offs, size_t cmdlen,
590 char *tmp, *search = NULL, *aptr;
591 const char *ptr, *cmd;
592 static char *from = NULL, *to = NULL;
593 int start, end, idx, has_mods = 0;
594 int p_on = 0, g_on = 0;
600 /* First get event specifier */
603 if (strchr(":^*$", command[offs + 1])) {
606 * "!:" is shorthand for "!!:".
607 * "!^", "!*" and "!$" are shorthand for
608 * "!!:^", "!!:*" and "!!:$" respectively.
610 str[0] = str[1] = '!';
612 ptr = get_history_event(str, &idx, 0);
613 idx = (command[offs + 1] == ':')? 1:0;
616 if (command[offs + 1] == '#') {
617 /* use command so far */
618 if ((aptr = malloc(offs + 1)) == NULL)
620 (void)strncpy(aptr, command, offs);
626 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0;
627 ptr = get_history_event(command + offs, &idx, qchar);
629 has_mods = command[offs + idx] == ':';
632 if (ptr == NULL && aptr == NULL)
636 *result = strdup(aptr? aptr : ptr);
642 cmd = command + offs + idx + 1;
644 /* Now parse any word designators */
646 if (*cmd == '%') /* last word matched by ?pat? */
647 tmp = strdup(last_search_match? last_search_match:"");
648 else if (strchr("^*$-0123456789", *cmd)) {
651 start = end = 1, cmd++;
652 else if (*cmd == '$')
654 else if (*cmd == '*')
656 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) {
658 while (*cmd && '0' <= *cmd && *cmd <= '9')
659 start = start * 10 + *cmd++ - '0';
662 if (isdigit((unsigned char) cmd[1])) {
665 while (*cmd && '0' <= *cmd && *cmd <= '9')
666 end = end * 10 + *cmd++ - '0';
667 } else if (cmd[1] == '$') {
674 } else if (*cmd == '*')
679 tmp = history_arg_extract(start, end, aptr? aptr:ptr);
681 (void)fprintf(rl_outstream, "%s: Bad word specifier",
682 command + offs + idx);
688 tmp = strdup(aptr? aptr:ptr);
693 if (*cmd == 0 || (cmd - (command + offs) >= cmdlen)) {
698 for (; *cmd; cmd++) {
701 else if (*cmd == 'h') { /* remove trailing path */
702 if ((aptr = strrchr(tmp, '/')) != NULL)
704 } else if (*cmd == 't') { /* remove leading path */
705 if ((aptr = strrchr(tmp, '/')) != NULL) {
706 aptr = strdup(aptr + 1);
710 } else if (*cmd == 'r') { /* remove trailing suffix */
711 if ((aptr = strrchr(tmp, '.')) != NULL)
713 } else if (*cmd == 'e') { /* remove all but suffix */
714 if ((aptr = strrchr(tmp, '.')) != NULL) {
719 } else if (*cmd == 'p') /* print only */
721 else if (*cmd == 'g')
723 else if (*cmd == 's' || *cmd == '&') {
724 char *what, *with, delim;
725 size_t len, from_len;
728 if (*cmd == '&' && (from == NULL || to == NULL))
730 else if (*cmd == 's') {
731 delim = *(++cmd), cmd++;
733 what = realloc(from, size);
740 for (; *cmd && *cmd != delim; cmd++) {
741 if (*cmd == '\\' && cmd[1] == delim)
745 nwhat = realloc(what,
761 from = strdup(search);
772 cmd++; /* shift after delim */
777 with = realloc(to, size);
784 from_len = strlen(from);
785 for (; *cmd && *cmd != delim; cmd++) {
786 if (len + from_len + 1 >= size) {
788 size += from_len + 1;
789 nwith = realloc(with, size);
799 (void)strcpy(&with[len], from);
804 && (*(cmd + 1) == delim
805 || *(cmd + 1) == '&'))
813 aptr = _rl_compat_sub(tmp, from, to, g_on);
827 * csh-style history expansion
830 history_expand(char *str, char **output)
836 if (h == NULL || e == NULL)
839 if (history_expansion_char == 0) {
840 *output = strdup(str);
845 if (str[0] == history_subst_char) {
846 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */
847 *output = malloc(strlen(str) + 4 + 1);
850 (*output)[0] = (*output)[1] = history_expansion_char;
853 (void)strcpy((*output) + 4, str);
856 *output = strdup(str);
861 #define ADD_STRING(what, len, fr) \
863 if (idx + len + 1 > size) { \
864 char *nresult = realloc(result, (size += len + 1));\
865 if (nresult == NULL) { \
867 if (/*CONSTCOND*/fr) \
873 (void)strncpy(&result[idx], what, len); \
875 result[idx] = '\0'; \
881 for (i = 0; str[i];) {
882 int qchar, loop_again;
883 size_t len, start, j;
889 for (; str[j]; j++) {
890 if (str[j] == '\\' &&
891 str[j + 1] == history_expansion_char) {
892 (void)strcpy(&str[j], &str[j + 1]);
896 if (isspace((unsigned char) str[j])
900 if (str[j] == history_expansion_char
901 && !strchr(history_no_expand_chars, str[j + 1])
902 && (!history_inhibit_expansion_function ||
903 (*history_inhibit_expansion_function)(str,
908 if (str[j] && loop_again) {
910 qchar = (j > 0 && str[j - 1] == '"' )? '"':0;
912 if (str[j] == history_expansion_char)
918 ADD_STRING(&str[start], len, 0);
920 if (str[i] == '\0' || str[i] != history_expansion_char) {
922 ADD_STRING(&str[i], len, 0);
929 ret = _history_expand_command (str, i, (j - i), &tmp);
930 if (ret > 0 && tmp) {
932 ADD_STRING(tmp, len, 1);
941 /* ret is 2 for "print only" option */
945 /* gdb 4.11 has been shipped with readline, where */
946 /* history_expand() returned -1 when the line */
947 /* should not be executed; in readline 2.1+ */
948 /* it should return 2 in such a case */
959 * Return a string consisting of arguments of "str" from "start" to "end".
962 history_arg_extract(int start, int end, const char *str)
967 arr = history_tokenize(str);
970 if (arr && *arr == NULL) {
975 for (max = 0; arr[max]; max++)
988 if (start < 0 || end < 0 || start > max || end > max || start > end)
991 for (i = start, len = 0; i <= end; i++)
992 len += strlen(arr[i]) + 1;
994 result = malloc(len);
998 for (i = start, len = 0; i <= end; i++) {
999 (void)strcpy(result + len, arr[i]);
1000 len += strlen(arr[i]);
1002 result[len++] = ' ';
1006 for (i = 0; arr[i]; i++)
1014 * Parse the string into individual tokens,
1015 * similar to how shell would do it.
1018 history_tokenize(const char *str)
1020 int size = 1, idx = 0, i, start;
1022 char **result = NULL, *temp, delim = '\0';
1024 for (i = 0; str[i];) {
1025 while (isspace((unsigned char) str[i]))
1029 if (str[i] == '\\') {
1030 if (str[i+1] != '\0')
1032 } else if (str[i] == delim)
1035 (isspace((unsigned char) str[i]) ||
1036 strchr("()<>;&|$", str[i])))
1038 else if (!delim && strchr("'`\"", str[i]))
1044 if (idx + 2 >= size) {
1047 nresult = realloc(result, size * sizeof(char *));
1048 if (nresult == NULL) {
1055 temp = malloc(len + 1);
1057 for (i = 0; i < idx; i++)
1062 (void)strncpy(temp, &str[start], len);
1064 result[idx++] = temp;
1074 * limit size of history record to ``max'' events
1077 stifle_history(int max)
1081 if (h == NULL || e == NULL)
1084 if (history(h, &ev, H_SETSIZE, max) == 0)
1085 max_input_history = max;
1090 * "unlimit" size of history - set the limit to maximum allowed int value
1093 unstifle_history(void)
1098 history(h, &ev, H_SETSIZE, INT_MAX);
1099 omax = max_input_history;
1100 max_input_history = INT_MAX;
1101 return (omax); /* some value _must_ be returned */
1106 history_is_stifled(void)
1109 /* cannot return true answer */
1110 return (max_input_history != INT_MAX);
1115 * read history from a file given
1118 read_history(const char *filename)
1122 if (h == NULL || e == NULL)
1124 return (history(h, &ev, H_LOAD, filename) == -1);
1129 * write history to a file given
1132 write_history(const char *filename)
1136 if (h == NULL || e == NULL)
1138 return (history(h, &ev, H_SAVE, filename) == -1);
1143 * returns history ``num''th event
1145 * returned pointer points to static variable
1148 history_get(int num)
1150 static HIST_ENTRY she;
1154 if (h == NULL || e == NULL)
1157 /* save current position */
1158 if (history(h, &ev, H_CURR) != 0)
1162 /* start from most recent */
1163 if (history(h, &ev, H_FIRST) != 0)
1164 return (NULL); /* error */
1166 /* look backwards for event matching specified offset */
1167 if (history(h, &ev, H_NEXT_EVENT, num + 1))
1173 /* restore pointer to where it was */
1174 (void)history(h, &ev, H_SET, curr_num);
1181 * add the line to history table
1184 add_history(const char *line)
1188 if (h == NULL || e == NULL)
1191 (void)history(h, &ev, H_ENTER, line);
1192 if (history(h, &ev, H_GETSIZE) == 0)
1193 history_length = ev.num;
1195 return (!(history_length > 0)); /* return 0 if all is okay */
1200 * remove the specified entry from the history list and return it.
1203 remove_history(int num)
1208 if (h == NULL || e == NULL)
1211 if (history(h, &ev, H_DEL, num) != 0)
1214 if ((she = malloc(sizeof(*she))) == NULL)
1225 * clear the history list - delete all entries
1232 history(h, &ev, H_CLEAR);
1237 * returns offset of the current history event
1245 if (history(h, &ev, H_CURR) != 0)
1249 history(h, &ev, H_FIRST);
1251 while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0)
1259 * returns current history event or NULL if there is no such event
1262 current_history(void)
1265 return (_move_history(H_CURR));
1270 * returns total number of bytes history events' data are using
1273 history_total_bytes(void)
1278 if (history(h, &ev, H_CURR) != 0)
1282 history(h, &ev, H_FIRST);
1285 size += strlen(ev.str);
1286 while (history(h, &ev, H_NEXT) == 0);
1288 /* get to the same position as before */
1289 history(h, &ev, H_PREV_EVENT, curr_num);
1296 * sets the position in the history list to ``pos''
1299 history_set_pos(int pos)
1304 if (pos > history_length || pos < 0)
1307 history(h, &ev, H_CURR);
1310 if (history(h, &ev, H_SET, pos)) {
1311 history(h, &ev, H_SET, curr_num);
1319 * returns previous event in history and shifts pointer accordingly
1322 previous_history(void)
1325 return (_move_history(H_PREV));
1330 * returns next event in history and shifts pointer accordingly
1336 return (_move_history(H_NEXT));
1341 * searches for first history event containing the str
1344 history_search(const char *str, int direction)
1350 if (history(h, &ev, H_CURR) != 0)
1355 if ((strp = strstr(ev.str, str)) != NULL)
1356 return (int) (strp - ev.str);
1357 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0)
1360 history(h, &ev, H_SET, curr_num);
1366 * searches for first history event beginning with str
1369 history_search_prefix(const char *str, int direction)
1373 return (history(h, &ev, direction < 0? H_PREV_STR:H_NEXT_STR, str));
1378 * search for event in history containing str, starting at offset
1379 * abs(pos); continue backward, if pos<0, forward otherwise
1383 history_search_pos(const char *str,
1384 int direction __attribute__((__unused__)), int pos)
1389 off = (pos > 0) ? pos : -pos;
1390 pos = (pos > 0) ? 1 : -1;
1392 if (history(h, &ev, H_CURR) != 0)
1396 if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0)
1401 if (strstr(ev.str, str))
1403 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0)
1407 /* set "current" pointer back to previous state */
1408 history(h, &ev, (pos < 0) ? H_NEXT_EVENT : H_PREV_EVENT, curr_num);
1414 /********************************/
1415 /* completion functions */
1418 tilde_expand(char *name)
1420 return fn_tilde_expand(name);
1424 filename_completion_function(const char *name, int state)
1426 return fn_filename_completion_function(name, state);
1430 * a completion generator for usernames; returns _first_ username
1431 * which starts with supplied text
1432 * text contains a partial username preceded by random character
1433 * (usually '~'); state is ignored
1434 * it's callers responsibility to free returned value
1437 username_completion_function(const char *text, int state)
1440 For when getpwent_r is supported:
1441 struct passwd *pwd, pwres;
1445 /* remove the above when getpwend_r is supported */
1447 if (text[0] == '\0')
1457 For when getpwent_r is supported:
1458 while (getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pwd) == 0
1459 && pwd != NULL && text[0] == pwd->pw_name[0]
1460 && strcmp(text, pwd->pw_name) == 0);
1464 if (pwd != NULL && text[0] == pwd->pw_name[0] && strcmp(text, pwd->pw_name) == 0)
1468 /* remove the above when getpwend_r is supported */
1474 return (strdup(pwd->pw_name));
1479 * el-compatible wrapper to send TSTP on ^Z
1482 static unsigned char
1483 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__)))
1485 (void)kill(0, SIGTSTP);
1490 * Display list of strings in columnar format on readline's output stream.
1491 * 'matches' is list of strings, 'len' is number of strings in 'matches',
1492 * 'max' is maximum length of string in 'matches'.
1495 rl_display_match_list(char **matches, int len, int max)
1498 fn_display_match_list(e, matches, len, max);
1503 _rl_completion_append_character_function(const char *dummy
1504 __attribute__((__unused__)))
1507 buf[1] = rl_completion_append_character;
1513 * complete word at current point
1517 rl_complete(int ignore __attribute__((__unused__)), int invoking_key)
1519 char *breakchars = NULL;
1521 if (h == NULL || e == NULL)
1524 if (rl_inhibit_completion) {
1526 arr[0] = (char)invoking_key;
1528 el_insertstr(e, arr);
1529 return (CC_REFRESH);
1532 if (rl_completion_word_break_hook != NULL)
1533 breakchars = rl_completion_word_break_hook();
1534 if (breakchars == NULL)
1535 breakchars = rl_basic_word_break_characters;
1537 /* Just look at how many global variables modify this operation! */
1538 return fn_complete(e,
1539 (CPFunction *)rl_completion_entry_function,
1540 rl_attempted_completion_function,
1541 breakchars, rl_special_prefixes,
1542 _rl_completion_append_character_function, rl_completion_query_items,
1543 &rl_completion_type, &rl_attempted_completion_over,
1544 &rl_point, &rl_end);
1549 static unsigned char
1550 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch)
1552 return (unsigned char)rl_complete(0, ch);
1556 * misc other functions
1560 * bind key c to readline-type function func
1563 rl_bind_key(int c, int func(int, int))
1567 if (h == NULL || e == NULL)
1570 if (func == rl_insert) {
1571 /* XXX notice there is no range checking of ``c'' */
1572 e->el_map.key[c] = ED_INSERT;
1580 * read one key from input - handles chars pushed back
1581 * to input stream also
1586 char fooarr[2 * sizeof(int)];
1588 if (e == NULL || h == NULL)
1591 return (el_getc(e, fooarr));
1596 * reset the terminal
1600 rl_reset_terminal(const char *p __attribute__((__unused__)))
1603 if (h == NULL || e == NULL)
1610 * insert character ``c'' back into input stream, ``count'' times
1613 rl_insert(int count, int c)
1617 if (h == NULL || e == NULL)
1620 /* XXX - int -> char conversion can lose on multichars */
1624 for (; count > 0; count--)
1632 rl_newline(int count, int c)
1635 * Readline-4.0 appears to ignore the args.
1637 return rl_insert(1, '\n');
1641 static unsigned char
1642 rl_bind_wrapper(EditLine *el, unsigned char c)
1651 /* If rl_done was set by the above call, deal with it here */
1659 rl_add_defun(const char *name, Function *fun, int c)
1662 if (c >= sizeof(map) / sizeof(map[0]) || c < 0)
1664 map[(unsigned char)c] = fun;
1665 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper);
1666 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0);
1667 el_set(e, EL_BIND, dest, name);
1672 rl_callback_read_char(void)
1674 int count = 0, done = 0;
1675 const char *buf = el_gets(e, &count);
1678 if (buf == NULL || count-- <= 0)
1680 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF])
1682 if (buf[count] == '\n' || buf[count] == '\r')
1685 if (done && rl_linefunc != NULL) {
1686 el_set(e, EL_UNBUFFERED, 0);
1688 if ((wbuf = strdup(buf)) != NULL)
1692 (*(void (*)(const char *))rl_linefunc)(wbuf);
1693 el_set(e, EL_UNBUFFERED, 1);
1698 rl_callback_handler_install(const char *prompt, VCPFunction *linefunc)
1705 rl_prompt = prompt ? strdup(strchr(prompt, *prompt)) : NULL;
1706 rl_linefunc = linefunc;
1707 el_set(e, EL_UNBUFFERED, 1);
1711 rl_callback_handler_remove(void)
1713 el_set(e, EL_UNBUFFERED, 0);
1721 a[0] = e->el_tty.t_c[TS_IO][C_REPRINT];
1727 rl_get_previous_history(int count, int key)
1739 rl_prep_terminal(int meta_flag)
1741 el_set(e, EL_PREP_TERM, 1);
1745 rl_deprep_terminal(void)
1747 el_set(e, EL_PREP_TERM, 0);
1751 rl_read_init_file(const char *s)
1753 return(el_source(e, s));
1757 rl_parse_and_bind(const char *line)
1763 tok = tok_init(NULL);
1764 tok_str(tok, line, &argc, &argv);
1765 argc = el_parse(e, argc, argv);
1767 return (argc ? 1 : 0);
1771 rl_variable_bind(const char *var, const char *value)
1774 * The proper return value is undocument, but this is what the
1775 * readline source seems to do.
1777 return ((el_set(e, EL_BIND, "", var, value) == -1) ? 1 : 0);
1781 rl_stuff_char(int c)
1787 el_insertstr(e, buf);
1791 _rl_event_read_char(EditLine *el, char *cp)
1793 int n, num_read = 0;
1796 while (rl_event_hook) {
1800 #if defined(FIONREAD)
1801 if (ioctl(el->el_infd, FIONREAD, &n) < 0)
1804 num_read = read(el->el_infd, cp, 1);
1807 #elif defined(F_SETFL) && defined(O_NDELAY)
1808 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0)
1810 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0)
1812 num_read = read(el->el_infd, cp, 1);
1813 if (fcntl(el->el_infd, F_SETFL, n))
1816 /* not non-blocking, but what you gonna do? */
1817 num_read = read(el->el_infd, cp, 1);
1821 if (num_read < 0 && errno == EAGAIN)
1828 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN);
1833 _rl_update_pos(void)
1835 const LineInfo *li = el_line(e);
1837 rl_point = li->cursor - li->buffer;
1838 rl_end = li->lastchar - li->buffer;
1842 rl_get_screen_size(int *rows, int *cols)
1845 el_get(e, EL_GETTC, "li", rows);
1847 el_get(e, EL_GETTC, "co", cols);
1851 rl_set_screen_size(int rows, int cols)
1854 (void)snprintf(buf, sizeof(buf), "%d", rows);
1855 el_set(e, EL_SETTC, "li", buf);
1856 (void)snprintf(buf, sizeof(buf), "%d", cols);
1857 el_set(e, EL_SETTC, "co", buf);
1861 rl_completion_matches(const char *str, rl_compentry_func_t *fun)
1863 size_t len, max, i, j, min;
1864 char **list, *match, *a, *b;
1868 if ((list = malloc(max * sizeof(*list))) == NULL)
1871 while ((match = (*fun)(str, (int)(len - 1))) != NULL) {
1875 if ((nl = realloc(list, max * sizeof(*nl))) == NULL)
1879 list[len++] = match;
1885 if ((list[0] = strdup(list[1])) == NULL)
1889 qsort(&list[1], len - 1, sizeof(*list),
1890 (int (*)(const void *, const void *)) strcmp);
1892 for (i = 1, a = list[i]; i < len - 1; i++, a = b) {
1894 for (j = 0; a[j] && a[j] == b[j]; j++)
1899 if (min == 0 && *str) {
1900 if ((list[0] = strdup(str)) == NULL)
1903 if ((list[0] = malloc(min + 1)) == NULL)
1905 (void)memcpy(list[0], list[1], min);
1906 list[0][min] = '\0';
1916 rl_filename_completion_function (const char *text, int state)
1918 return fn_filename_completion_function(text, state);
1922 rl_forced_update_display(void)
1924 el_set(e, EL_REFRESH);
1928 _rl_abort_internal(void)
1936 _rl_qsort_string_compare(char **s1, char **s2)
1938 return strcoll(*s1, *s2);
1943 rl_kill_text(int from, int to)
1949 rl_make_bare_keymap(void)
1962 rl_set_keymap(Keymap k)
1968 rl_generic_bind(int type, const char * keyseq, const char * data, Keymap k)
1975 rl_bind_key_in_map(int key, Function *fun, Keymap k)