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Diffstat (limited to 'src/readline.c')
| -rw-r--r-- | src/readline.c | 2277 |
1 files changed, 2277 insertions, 0 deletions
diff --git a/src/readline.c b/src/readline.c new file mode 100644 index 0000000..8cb43b9 --- /dev/null +++ b/src/readline.c @@ -0,0 +1,2277 @@ +/* $NetBSD: readline.c,v 1.108 2013/05/28 00:10:34 christos Exp $ */ + +/*- + * Copyright (c) 1997 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Jaromir Dolecek. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" +#if !defined(lint) && !defined(SCCSID) +__RCSID("$NetBSD: readline.c,v 1.108 2013/05/28 00:10:34 christos Exp $"); +#endif /* not lint && not SCCSID */ + +#include <sys/types.h> +#include <sys/stat.h> +#include <stdio.h> +#include <dirent.h> +#include <string.h> +#include <pwd.h> +#include <ctype.h> +#include <stdlib.h> +#include <unistd.h> +#include <limits.h> +#include <errno.h> +#include <fcntl.h> +#include <setjmp.h> +#include <vis.h> + +#include "editline/readline.h" +#include "el.h" +#include "fcns.h" /* for EL_NUM_FCNS */ +#include "histedit.h" +#include "filecomplete.h" + +#if !defined(SIZE_T_MAX) +# define SIZE_T_MAX (size_t)(-1) +#endif + +void rl_prep_terminal(int); +void rl_deprep_terminal(void); + +/* for rl_complete() */ +#define TAB '\r' + +/* see comment at the #ifdef for sense of this */ +/* #define GDB_411_HACK */ + +/* readline compatibility stuff - look at readline sources/documentation */ +/* to see what these variables mean */ +const char *rl_library_version = "EditLine wrapper"; +int rl_readline_version = RL_READLINE_VERSION; +static char empty[] = { '\0' }; +static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; +static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', + '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; +char *rl_readline_name = empty; +FILE *rl_instream = NULL; +FILE *rl_outstream = NULL; +int rl_point = 0; +int rl_end = 0; +char *rl_line_buffer = NULL; +VCPFunction *rl_linefunc = NULL; +int rl_done = 0; +VFunction *rl_event_hook = NULL; +KEYMAP_ENTRY_ARRAY emacs_standard_keymap, + emacs_meta_keymap, + emacs_ctlx_keymap; +/* + * The following is not implemented; we always catch signals in the + * libedit fashion: set handlers on entry to el_gets() and clear them + * on the way out. This simplistic approach works for most cases; if + * it does not work for your application, please let us know. + */ +int rl_catch_signals = 1; +int rl_catch_sigwinch = 1; + +int history_base = 1; /* probably never subject to change */ +int history_length = 0; +int max_input_history = 0; +char history_expansion_char = '!'; +char history_subst_char = '^'; +char *history_no_expand_chars = expand_chars; +Function *history_inhibit_expansion_function = NULL; +char *history_arg_extract(int start, int end, const char *str); + +int rl_inhibit_completion = 0; +int rl_attempted_completion_over = 0; +char *rl_basic_word_break_characters = break_chars; +char *rl_completer_word_break_characters = NULL; +char *rl_completer_quote_characters = NULL; +Function *rl_completion_entry_function = NULL; +char *(*rl_completion_word_break_hook)(void) = NULL; +CPPFunction *rl_attempted_completion_function = NULL; +Function *rl_pre_input_hook = NULL; +Function *rl_startup1_hook = NULL; +int (*rl_getc_function)(FILE *) = NULL; +char *rl_terminal_name = NULL; +int rl_already_prompted = 0; +int rl_filename_completion_desired = 0; +int rl_ignore_completion_duplicates = 0; +int readline_echoing_p = 1; +int _rl_print_completions_horizontally = 0; +VFunction *rl_redisplay_function = NULL; +Function *rl_startup_hook = NULL; +VFunction *rl_completion_display_matches_hook = NULL; +VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; +VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; +KEYMAP_ENTRY_ARRAY emacs_meta_keymap; + +/* + * The current prompt string. + */ +char *rl_prompt = NULL; +/* + * This is set to character indicating type of completion being done by + * rl_complete_internal(); this is available for application completion + * functions. + */ +int rl_completion_type = 0; + +/* + * If more than this number of items results from query for possible + * completions, we ask user if they are sure to really display the list. + */ +int rl_completion_query_items = 100; + +/* + * List of characters which are word break characters, but should be left + * in the parsed text when it is passed to the completion function. + * Shell uses this to help determine what kind of completing to do. + */ +char *rl_special_prefixes = NULL; + +/* + * This is the character appended to the completed words if at the end of + * the line. Default is ' ' (a space). + */ +int rl_completion_append_character = ' '; + +/* stuff below is used internally by libedit for readline emulation */ + +static History *h = NULL; +static EditLine *e = NULL; +static Function *map[256]; +static jmp_buf topbuf; + +/* internal functions */ +static unsigned char _el_rl_complete(EditLine *, int); +static unsigned char _el_rl_tstp(EditLine *, int); +static char *_get_prompt(EditLine *); +static int _getc_function(EditLine *, char *); +static HIST_ENTRY *_move_history(int); +static int _history_expand_command(const char *, size_t, size_t, + char **); +static char *_rl_compat_sub(const char *, const char *, + const char *, int); +static int _rl_event_read_char(EditLine *, char *); +static void _rl_update_pos(void); + + +/* ARGSUSED */ +static char * +_get_prompt(EditLine *el __attribute__((__unused__))) +{ + rl_already_prompted = 1; + return rl_prompt; +} + + +/* + * generic function for moving around history + */ +static HIST_ENTRY * +_move_history(int op) +{ + HistEvent ev; + static HIST_ENTRY rl_he; + + if (history(h, &ev, op) != 0) + return NULL; + + rl_he.line = ev.str; + rl_he.data = NULL; + + return &rl_he; +} + + +/* + * read one key from user defined input function + */ +static int +/*ARGSUSED*/ +_getc_function(EditLine *el __attribute__((__unused__)), char *c) +{ + int i; + + i = (*rl_getc_function)(NULL); + if (i == -1) + return 0; + *c = (char)i; + return 1; +} + +static void +_resize_fun(EditLine *el, void *a) +{ + const LineInfo *li; + char **ap = a; + + li = el_line(el); + /* a cheesy way to get rid of const cast. */ + *ap = memchr(li->buffer, *li->buffer, (size_t)1); +} + +static const char * +_default_history_file(void) +{ + struct passwd *p; + static char path[PATH_MAX]; + + if (*path) + return path; + if ((p = getpwuid(getuid())) == NULL) + return NULL; + (void)snprintf(path, sizeof(path), "%s/.history", p->pw_dir); + return path; +} + +/* + * READLINE compatibility stuff + */ + +/* + * Set the prompt + */ +int +rl_set_prompt(const char *prompt) +{ + char *p; + + if (!prompt) + prompt = ""; + if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) + return 0; + if (rl_prompt) + el_free(rl_prompt); + rl_prompt = strdup(prompt); + if (rl_prompt == NULL) + return -1; + + while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) + *p = RL_PROMPT_START_IGNORE; + + return 0; +} + +/* + * initialize rl compat stuff + */ +int +rl_initialize(void) +{ + HistEvent ev; + int editmode = 1; + struct termios t; + + if (e != NULL) + el_end(e); + if (h != NULL) + history_end(h); + + if (!rl_instream) + rl_instream = stdin; + if (!rl_outstream) + rl_outstream = stdout; + + /* + * See if we don't really want to run the editor + */ + if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) + editmode = 0; + + e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr); + + if (!editmode) + el_set(e, EL_EDITMODE, 0); + + h = history_init(); + if (!e || !h) + return -1; + + history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ + history_length = 0; + max_input_history = INT_MAX; + el_set(e, EL_HIST, history, h); + + /* Setup resize function */ + el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); + + /* setup getc function if valid */ + if (rl_getc_function) + el_set(e, EL_GETCFN, _getc_function); + + /* for proper prompt printing in readline() */ + if (rl_set_prompt("") == -1) { + history_end(h); + el_end(e); + return -1; + } + el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE); + el_set(e, EL_SIGNAL, rl_catch_signals); + + /* set default mode to "emacs"-style and read setting afterwards */ + /* so this can be overriden */ + el_set(e, EL_EDITOR, "emacs"); + if (rl_terminal_name != NULL) + el_set(e, EL_TERMINAL, rl_terminal_name); + else + el_get(e, EL_TERMINAL, &rl_terminal_name); + + /* + * Word completion - this has to go AFTER rebinding keys + * to emacs-style. + */ + el_set(e, EL_ADDFN, "rl_complete", + "ReadLine compatible completion function", + _el_rl_complete); + el_set(e, EL_BIND, "^I", "rl_complete", NULL); + + /* + * Send TSTP when ^Z is pressed. + */ + el_set(e, EL_ADDFN, "rl_tstp", + "ReadLine compatible suspend function", + _el_rl_tstp); + el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); + + /* read settings from configuration file */ + el_source(e, NULL); + + /* + * Unfortunately, some applications really do use rl_point + * and rl_line_buffer directly. + */ + _resize_fun(e, &rl_line_buffer); + _rl_update_pos(); + + if (rl_startup_hook) + (*rl_startup_hook)(NULL, 0); + + return 0; +} + + +/* + * read one line from input stream and return it, chomping + * trailing newline (if there is any) + */ +char * +readline(const char *p) +{ + HistEvent ev; + const char * volatile prompt = p; + int count; + const char *ret; + char *buf; + static int used_event_hook; + + if (e == NULL || h == NULL) + rl_initialize(); + + rl_done = 0; + + (void)setjmp(topbuf); + + /* update prompt accordingly to what has been passed */ + if (rl_set_prompt(prompt) == -1) + return NULL; + + if (rl_pre_input_hook) + (*rl_pre_input_hook)(NULL, 0); + + if (rl_event_hook && !(e->el_flags&NO_TTY)) { + el_set(e, EL_GETCFN, _rl_event_read_char); + used_event_hook = 1; + } + + if (!rl_event_hook && used_event_hook) { + el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); + used_event_hook = 0; + } + + rl_already_prompted = 0; + + /* get one line from input stream */ + ret = el_gets(e, &count); + + if (ret && count > 0) { + int lastidx; + + buf = strdup(ret); + if (buf == NULL) + return NULL; + lastidx = count - 1; + if (buf[lastidx] == '\n') + buf[lastidx] = '\0'; + } else + buf = NULL; + + history(h, &ev, H_GETSIZE); + history_length = ev.num; + + return buf; +} + +/* + * history functions + */ + +/* + * is normally called before application starts to use + * history expansion functions + */ +void +using_history(void) +{ + if (h == NULL || e == NULL) + rl_initialize(); +} + + +/* + * substitute ``what'' with ``with'', returning resulting string; if + * globally == 1, substitutes all occurrences of what, otherwise only the + * first one + */ +static char * +_rl_compat_sub(const char *str, const char *what, const char *with, + int globally) +{ + const char *s; + char *r, *result; + size_t len, with_len, what_len; + + len = strlen(str); + with_len = strlen(with); + what_len = strlen(what); + + /* calculate length we need for result */ + s = str; + while (*s) { + if (*s == *what && !strncmp(s, what, what_len)) { + len += with_len - what_len; + if (!globally) + break; + s += what_len; + } else + s++; + } + r = result = el_malloc((len + 1) * sizeof(*r)); + if (result == NULL) + return NULL; + s = str; + while (*s) { + if (*s == *what && !strncmp(s, what, what_len)) { + (void)strncpy(r, with, with_len); + r += with_len; + s += what_len; + if (!globally) { + (void)strcpy(r, s); + return result; + } + } else + *r++ = *s++; + } + *r = '\0'; + return result; +} + +static char *last_search_pat; /* last !?pat[?] search pattern */ +static char *last_search_match; /* last !?pat[?] that matched */ + +const char * +get_history_event(const char *cmd, int *cindex, int qchar) +{ + int idx, sign, sub, num, begin, ret; + size_t len; + char *pat; + const char *rptr; + HistEvent ev; + + idx = *cindex; + if (cmd[idx++] != history_expansion_char) + return NULL; + + /* find out which event to take */ + if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { + if (history(h, &ev, H_FIRST) != 0) + return NULL; + *cindex = cmd[idx]? (idx + 1):idx; + return ev.str; + } + sign = 0; + if (cmd[idx] == '-') { + sign = 1; + idx++; + } + + if ('0' <= cmd[idx] && cmd[idx] <= '9') { + HIST_ENTRY *rl_he; + + num = 0; + while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { + num = num * 10 + cmd[idx] - '0'; + idx++; + } + if (sign) + num = history_length - num + 1; + + if (!(rl_he = history_get(num))) + return NULL; + + *cindex = idx; + return rl_he->line; + } + sub = 0; + if (cmd[idx] == '?') { + sub = 1; + idx++; + } + begin = idx; + while (cmd[idx]) { + if (cmd[idx] == '\n') + break; + if (sub && cmd[idx] == '?') + break; + if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' + || cmd[idx] == '\t' || cmd[idx] == qchar)) + break; + idx++; + } + len = (size_t)idx - (size_t)begin; + if (sub && cmd[idx] == '?') + idx++; + if (sub && len == 0 && last_search_pat && *last_search_pat) + pat = last_search_pat; + else if (len == 0) + return NULL; + else { + if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL) + return NULL; + (void)strncpy(pat, cmd + begin, len); + pat[len] = '\0'; + } + + if (history(h, &ev, H_CURR) != 0) { + if (pat != last_search_pat) + el_free(pat); + return NULL; + } + num = ev.num; + + if (sub) { + if (pat != last_search_pat) { + if (last_search_pat) + el_free(last_search_pat); + last_search_pat = pat; + } + ret = history_search(pat, -1); + } else + ret = history_search_prefix(pat, -1); + + if (ret == -1) { + /* restore to end of list on failed search */ + history(h, &ev, H_FIRST); + (void)fprintf(rl_outstream, "%s: Event not found\n", pat); + if (pat != last_search_pat) + el_free(pat); + return NULL; + } + + if (sub && len) { + if (last_search_match && last_search_match != pat) + el_free(last_search_match); + last_search_match = pat; + } + + if (pat != last_search_pat) + el_free(pat); + + if (history(h, &ev, H_CURR) != 0) + return NULL; + *cindex = idx; + rptr = ev.str; + + /* roll back to original position */ + (void)history(h, &ev, H_SET, num); + + return rptr; +} + +/* + * the real function doing history expansion - takes as argument command + * to do and data upon which the command should be executed + * does expansion the way I've understood readline documentation + * + * returns 0 if data was not modified, 1 if it was and 2 if the string + * should be only printed and not executed; in case of error, + * returns -1 and *result points to NULL + * it's callers responsibility to free() string returned in *result + */ +static int +_history_expand_command(const char *command, size_t offs, size_t cmdlen, + char **result) +{ + char *tmp, *search = NULL, *aptr; + const char *ptr, *cmd; + static char *from = NULL, *to = NULL; + int start, end, idx, has_mods = 0; + int p_on = 0, g_on = 0; + + *result = NULL; + aptr = NULL; + ptr = NULL; + + /* First get event specifier */ + idx = 0; + + if (strchr(":^*$", command[offs + 1])) { + char str[4]; + /* + * "!:" is shorthand for "!!:". + * "!^", "!*" and "!$" are shorthand for + * "!!:^", "!!:*" and "!!:$" respectively. + */ + str[0] = str[1] = '!'; + str[2] = '0'; + ptr = get_history_event(str, &idx, 0); + idx = (command[offs + 1] == ':')? 1:0; + has_mods = 1; + } else { + if (command[offs + 1] == '#') { + /* use command so far */ + if ((aptr = el_malloc((offs + 1) * sizeof(*aptr))) + == NULL) + return -1; + (void)strncpy(aptr, command, offs); + aptr[offs] = '\0'; + idx = 1; + } else { + int qchar; + + qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; + ptr = get_history_event(command + offs, &idx, qchar); + } + has_mods = command[offs + (size_t)idx] == ':'; + } + + if (ptr == NULL && aptr == NULL) + return -1; + + if (!has_mods) { + *result = strdup(aptr ? aptr : ptr); + if (aptr) + el_free(aptr); + if (*result == NULL) + return -1; + return 1; + } + + cmd = command + offs + idx + 1; + + /* Now parse any word designators */ + + if (*cmd == '%') /* last word matched by ?pat? */ + tmp = strdup(last_search_match? last_search_match:""); + else if (strchr("^*$-0123456789", *cmd)) { + start = end = -1; + if (*cmd == '^') + start = end = 1, cmd++; + else if (*cmd == '$') + start = -1, cmd++; + else if (*cmd == '*') + start = 1, cmd++; + else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { + start = 0; + while (*cmd && '0' <= *cmd && *cmd <= '9') + start = start * 10 + *cmd++ - '0'; + + if (*cmd == '-') { + if (isdigit((unsigned char) cmd[1])) { + cmd++; + end = 0; + while (*cmd && '0' <= *cmd && *cmd <= '9') + end = end * 10 + *cmd++ - '0'; + } else if (cmd[1] == '$') { + cmd += 2; + end = -1; + } else { + cmd++; + end = -2; + } + } else if (*cmd == '*') + end = -1, cmd++; + else + end = start; + } + tmp = history_arg_extract(start, end, aptr? aptr:ptr); + if (tmp == NULL) { + (void)fprintf(rl_outstream, "%s: Bad word specifier", + command + offs + idx); + if (aptr) + el_free(aptr); + return -1; + } + } else + tmp = strdup(aptr? aptr:ptr); + + if (aptr) + el_free(aptr); + + if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { + *result = tmp; + return 1; + } + + for (; *cmd; cmd++) { + if (*cmd == ':') + continue; + else if (*cmd == 'h') { /* remove trailing path */ + if ((aptr = strrchr(tmp, '/')) != NULL) + *aptr = '\0'; + } else if (*cmd == 't') { /* remove leading path */ + if ((aptr = strrchr(tmp, '/')) != NULL) { + aptr = strdup(aptr + 1); + el_free(tmp); + tmp = aptr; + } + } else if (*cmd == 'r') { /* remove trailing suffix */ + if ((aptr = strrchr(tmp, '.')) != NULL) + *aptr = '\0'; + } else if (*cmd == 'e') { /* remove all but suffix */ + if ((aptr = strrchr(tmp, '.')) != NULL) { + aptr = strdup(aptr); + el_free(tmp); + tmp = aptr; + } + } else if (*cmd == 'p') /* print only */ + p_on = 1; + else if (*cmd == 'g') + g_on = 2; + else if (*cmd == 's' || *cmd == '&') { + char *what, *with, delim; + size_t len, from_len; + size_t size; + + if (*cmd == '&' && (from == NULL || to == NULL)) + continue; + else if (*cmd == 's') { + delim = *(++cmd), cmd++; + size = 16; + what = el_realloc(from, size * sizeof(*what)); + if (what == NULL) { + el_free(from); + el_free(tmp); + return 0; + } + len = 0; + for (; *cmd && *cmd != delim; cmd++) { + if (*cmd == '\\' && cmd[1] == delim) + cmd++; + if (len >= size) { + char *nwhat; + nwhat = el_realloc(what, + (size <<= 1) * + sizeof(*nwhat)); + if (nwhat == NULL) { + el_free(what); + el_free(tmp); + return 0; + } + what = nwhat; + } + what[len++] = *cmd; + } + what[len] = '\0'; + from = what; + if (*what == '\0') { + el_free(what); + if (search) { + from = strdup(search); + if (from == NULL) { + el_free(tmp); + return 0; + } + } else { + from = NULL; + el_free(tmp); + return -1; + } + } + cmd++; /* shift after delim */ + if (!*cmd) + continue; + + size = 16; + with = el_realloc(to, size * sizeof(*with)); + if (with == NULL) { + el_free(to); + el_free(tmp); + return -1; + } + len = 0; + from_len = strlen(from); + for (; *cmd && *cmd != delim; cmd++) { + if (len + from_len + 1 >= size) { + char *nwith; + size += from_len + 1; + nwith = el_realloc(with, + size * sizeof(*nwith)); + if (nwith == NULL) { + el_free(with); + el_free(tmp); + return -1; + } + with = nwith; + } + if (*cmd == '&') { + /* safe */ + (void)strcpy(&with[len], from); + len += from_len; + continue; + } + if (*cmd == '\\' + && (*(cmd + 1) == delim + || *(cmd + 1) == '&')) + cmd++; + with[len++] = *cmd; + } + with[len] = '\0'; + to = with; + } + + aptr = _rl_compat_sub(tmp, from, to, g_on); + if (aptr) { + el_free(tmp); + tmp = aptr; + } + g_on = 0; + } + } + *result = tmp; + return p_on? 2:1; +} + + +/* + * csh-style history expansion + */ +int +history_expand(char *str, char **output) +{ + int ret = 0; + size_t idx, i, size; + char *tmp, *result; + + if (h == NULL || e == NULL) + rl_initialize(); + + if (history_expansion_char == 0) { + *output = strdup(str); + return 0; + } + + *output = NULL; + if (str[0] == history_subst_char) { + /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ + *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output)); + if (*output == NULL) + return 0; + (*output)[0] = (*output)[1] = history_expansion_char; + (*output)[2] = ':'; + (*output)[3] = 's'; + (void)strcpy((*output) + 4, str); + str = *output; + } else { + *output = strdup(str); + if (*output == NULL) + return 0; + } + +#define ADD_STRING(what, len, fr) \ + { \ + if (idx + len + 1 > size) { \ + char *nresult = el_realloc(result, \ + (size += len + 1) * sizeof(*nresult)); \ + if (nresult == NULL) { \ + el_free(*output); \ + if (/*CONSTCOND*/fr) \ + el_free(tmp); \ + return 0; \ + } \ + result = nresult; \ + } \ + (void)strncpy(&result[idx], what, len); \ + idx += len; \ + result[idx] = '\0'; \ + } + + result = NULL; + size = idx = 0; + tmp = NULL; + for (i = 0; str[i];) { + int qchar, loop_again; + size_t len, start, j; + + qchar = 0; + loop_again = 1; + start = j = i; +loop: + for (; str[j]; j++) { + if (str[j] == '\\' && + str[j + 1] == history_expansion_char) { + (void)strcpy(&str[j], &str[j + 1]); + continue; + } + if (!loop_again) { + if (isspace((unsigned char) str[j]) + || str[j] == qchar) + break; + } + if (str[j] == history_expansion_char + && !strchr(history_no_expand_chars, str[j + 1]) + && (!history_inhibit_expansion_function || + (*history_inhibit_expansion_function)(str, + (int)j) == 0)) + break; + } + + if (str[j] && loop_again) { + i = j; + qchar = (j > 0 && str[j - 1] == '"' )? '"':0; + j++; + if (str[j] == history_expansion_char) + j++; + loop_again = 0; + goto loop; + } + len = i - start; + ADD_STRING(&str[start], len, 0); + + if (str[i] == '\0' || str[i] != history_expansion_char) { + len = j - i; + ADD_STRING(&str[i], len, 0); + if (start == 0) + ret = 0; + else + ret = 1; + break; + } + ret = _history_expand_command (str, i, (j - i), &tmp); + if (ret > 0 && tmp) { + len = strlen(tmp); + ADD_STRING(tmp, len, 1); + } + if (tmp) { + el_free(tmp); + tmp = NULL; + } + i = j; + } + + /* ret is 2 for "print only" option */ + if (ret == 2) { + add_history(result); +#ifdef GDB_411_HACK + /* gdb 4.11 has been shipped with readline, where */ + /* history_expand() returned -1 when the line */ + /* should not be executed; in readline 2.1+ */ + /* it should return 2 in such a case */ + ret = -1; +#endif + } + el_free(*output); + *output = result; + + return ret; +} + +/* +* Return a string consisting of arguments of "str" from "start" to "end". +*/ +char * +history_arg_extract(int start, int end, const char *str) +{ + size_t i, len, max; + char **arr, *result = NULL; + + arr = history_tokenize(str); + if (!arr) + return NULL; + if (arr && *arr == NULL) + goto out; + + for (max = 0; arr[max]; max++) + continue; + max--; + + if (start == '$') + start = (int)max; + if (end == '$') + end = (int)max; + if (end < 0) + end = (int)max + end + 1; + if (start < 0) + start = end; + + if (start < 0 || end < 0 || (size_t)start > max || + (size_t)end > max || start > end) + goto out; + + for (i = (size_t)start, len = 0; i <= (size_t)end; i++) + len += strlen(arr[i]) + 1; + len++; + result = el_malloc(len * sizeof(*result)); + if (result == NULL) + goto out; + + for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { + (void)strcpy(result + len, arr[i]); + len += strlen(arr[i]); + if (i < (size_t)end) + result[len++] = ' '; + } + result[len] = '\0'; + +out: + for (i = 0; arr[i]; i++) + el_free(arr[i]); + el_free(arr); + + return result; +} + +/* + * Parse the string into individual tokens, + * similar to how shell would do it. + */ +char ** +history_tokenize(const char *str) +{ + int size = 1, idx = 0, i, start; + size_t len; + char **result = NULL, *temp, delim = '\0'; + + for (i = 0; str[i];) { + while (isspace((unsigned char) str[i])) + i++; + start = i; + for (; str[i];) { + if (str[i] == '\\') { + if (str[i+1] != '\0') + i++; + } else if (str[i] == delim) + delim = '\0'; + else if (!delim && + (isspace((unsigned char) str[i]) || + strchr("()<>;&|$", str[i]))) + break; + else if (!delim && strchr("'`\"", str[i])) + delim = str[i]; + if (str[i]) + i++; + } + + if (idx + 2 >= size) { + char **nresult; + size <<= 1; + nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); + if (nresult == NULL) { + el_free(result); + return NULL; + } + result = nresult; + } + len = (size_t)i - (size_t)start; + temp = el_malloc((size_t)(len + 1) * sizeof(*temp)); + if (temp == NULL) { + for (i = 0; i < idx; i++) + el_free(result[i]); + el_free(result); + return NULL; + } + (void)strncpy(temp, &str[start], len); + temp[len] = '\0'; + result[idx++] = temp; + result[idx] = NULL; + if (str[i]) + i++; + } + return result; +} + + +/* + * limit size of history record to ``max'' events + */ +void +stifle_history(int max) +{ + HistEvent ev; + + if (h == NULL || e == NULL) + rl_initialize(); + + if (history(h, &ev, H_SETSIZE, max) == 0) + max_input_history = max; +} + + +/* + * "unlimit" size of history - set the limit to maximum allowed int value + */ +int +unstifle_history(void) +{ + HistEvent ev; + int omax; + + history(h, &ev, H_SETSIZE, INT_MAX); + omax = max_input_history; + max_input_history = INT_MAX; + return omax; /* some value _must_ be returned */ +} + + +int +history_is_stifled(void) +{ + + /* cannot return true answer */ + return max_input_history != INT_MAX; +} + +static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; + +int +history_truncate_file (const char *filename, int nlines) +{ + int ret = 0; + FILE *fp, *tp; + char template[sizeof(_history_tmp_template)]; + char buf[4096]; + int fd; + char *cp; + off_t off; + int count = 0; + ssize_t left = 0; + + if (filename == NULL && (filename = _default_history_file()) == NULL) + return errno; + if ((fp = fopen(filename, "r+")) == NULL) + return errno; + strcpy(template, _history_tmp_template); + if ((fd = mkstemp(template)) == -1) { + ret = errno; + goto out1; + } + + if ((tp = fdopen(fd, "r+")) == NULL) { + close(fd); + ret = errno; + goto out2; + } + + for(;;) { + if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { + if (ferror(fp)) { + ret = errno; + break; + } + if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == + (off_t)-1) { + ret = errno; + break; + } + left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); + if (ferror(fp)) { + ret = errno; + break; + } + if (left == 0) { + count--; + left = sizeof(buf); + } else if (fwrite(buf, (size_t)left, (size_t)1, tp) + != 1) { + ret = errno; + break; + } + fflush(tp); + break; + } + if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { + ret = errno; + break; + } + count++; + } + if (ret) + goto out3; + cp = buf + left - 1; + if(*cp != '\n') + cp++; + for(;;) { + while (--cp >= buf) { + if (*cp == '\n') { + if (--nlines == 0) { + if (++cp >= buf + sizeof(buf)) { + count++; + cp = buf; + } + break; + } + } + } + if (nlines <= 0 || count == 0) + break; + count--; + if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { + ret = errno; + break; + } + if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { + if (ferror(tp)) { + ret = errno; + break; + } + ret = EAGAIN; + break; + } + cp = buf + sizeof(buf); + } + + if (ret || nlines > 0) + goto out3; + + if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { + ret = errno; + goto out3; + } + + if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == + (off_t)-1) { + ret = errno; + goto out3; + } + + for(;;) { + if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { + if (ferror(fp)) + ret = errno; + break; + } + if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { + ret = errno; + break; + } + } + fflush(fp); + if((off = ftello(fp)) > 0) + (void)ftruncate(fileno(fp), off); +out3: + fclose(tp); +out2: + unlink(template); +out1: + fclose(fp); + + return ret; +} + + +/* + * read history from a file given + */ +int +read_history(const char *filename) +{ + HistEvent ev; + + if (h == NULL || e == NULL) + rl_initialize(); + if (filename == NULL && (filename = _default_history_file()) == NULL) + return errno; + return history(h, &ev, H_LOAD, filename) == -1 ? + (errno ? errno : EINVAL) : 0; +} + + +/* + * write history to a file given + */ +int +write_history(const char *filename) +{ + HistEvent ev; + + if (h == NULL || e == NULL) + rl_initialize(); + if (filename == NULL && (filename = _default_history_file()) == NULL) + return errno; + return history(h, &ev, H_SAVE, filename) == -1 ? + (errno ? errno : EINVAL) : 0; +} + + +/* + * returns history ``num''th event + * + * returned pointer points to static variable + */ +HIST_ENTRY * +history_get(int num) +{ + static HIST_ENTRY she; + HistEvent ev; + int curr_num; + + if (h == NULL || e == NULL) + rl_initialize(); + + /* save current position */ + if (history(h, &ev, H_CURR) != 0) + return NULL; + curr_num = ev.num; + + /* start from the oldest */ + if (history(h, &ev, H_LAST) != 0) + return NULL; /* error */ + + /* look forwards for event matching specified offset */ + if (history(h, &ev, H_NEXT_EVDATA, num, &she.data)) + return NULL; + + she.line = ev.str; + + /* restore pointer to where it was */ + (void)history(h, &ev, H_SET, curr_num); + + return &she; +} + + +/* + * add the line to history table + */ +int +add_history(const char *line) +{ + HistEvent ev; + + if (line == NULL) + return 0; + + if (h == NULL || e == NULL) + rl_initialize(); + + (void)history(h, &ev, H_ENTER, line); + if (history(h, &ev, H_GETSIZE) == 0) + history_length = ev.num; + + return !(history_length > 0); /* return 0 if all is okay */ +} + + +/* + * remove the specified entry from the history list and return it. + */ +HIST_ENTRY * +remove_history(int num) +{ + HIST_ENTRY *he; + HistEvent ev; + + if (h == NULL || e == NULL) + rl_initialize(); + + if ((he = el_malloc(sizeof(*he))) == NULL) + return NULL; + + if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { + el_free(he); + return NULL; + } + + he->line = ev.str; + if (history(h, &ev, H_GETSIZE) == 0) + history_length = ev.num; + + return he; +} + + +/* + * replace the line and data of the num-th entry + */ +HIST_ENTRY * +replace_history_entry(int num, const char *line, histdata_t data) +{ + HIST_ENTRY *he; + HistEvent ev; + int curr_num; + + if (h == NULL || e == NULL) + rl_initialize(); + + /* save current position */ + if (history(h, &ev, H_CURR) != 0) + return NULL; + curr_num = ev.num; + + /* start from the oldest */ + if (history(h, &ev, H_LAST) != 0) + return NULL; /* error */ + + if ((he = el_malloc(sizeof(*he))) == NULL) + return NULL; + + /* look forwards for event matching specified offset */ + if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) + goto out; + + he->line = strdup(ev.str); + if (he->line == NULL) + goto out; + + if (history(h, &ev, H_REPLACE, line, data)) + goto out; + + /* restore pointer to where it was */ + if (history(h, &ev, H_SET, curr_num)) + goto out; + + return he; +out: + el_free(he); + return NULL; +} + +/* + * clear the history list - delete all entries + */ +void +clear_history(void) +{ + HistEvent ev; + + (void)history(h, &ev, H_CLEAR); + history_length = 0; +} + + +/* + * returns offset of the current history event + */ +int +where_history(void) +{ + HistEvent ev; + int curr_num, off; + + if (history(h, &ev, H_CURR) != 0) + return 0; + curr_num = ev.num; + + (void)history(h, &ev, H_FIRST); + off = 1; + while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0) + off++; + + return off; +} + + +/* + * returns current history event or NULL if there is no such event + */ +HIST_ENTRY * +current_history(void) +{ + + return _move_history(H_CURR); +} + + +/* + * returns total number of bytes history events' data are using + */ +int +history_total_bytes(void) +{ + HistEvent ev; + int curr_num; + size_t size; + + if (history(h, &ev, H_CURR) != 0) + return -1; + curr_num = ev.num; + + (void)history(h, &ev, H_FIRST); + size = 0; + do + size += strlen(ev.str) * sizeof(*ev.str); + while (history(h, &ev, H_NEXT) == 0); + + /* get to the same position as before */ + history(h, &ev, H_PREV_EVENT, curr_num); + + return (int)size; +} + + +/* + * sets the position in the history list to ``pos'' + */ +int +history_set_pos(int pos) +{ + HistEvent ev; + int curr_num; + + if (pos >= history_length || pos < 0) + return -1; + + (void)history(h, &ev, H_CURR); + curr_num = ev.num; + + /* + * use H_DELDATA to set to nth history (without delete) by passing + * (void **)-1 + */ + if (history(h, &ev, H_DELDATA, pos, (void **)-1)) { + (void)history(h, &ev, H_SET, curr_num); + return -1; + } + return 0; +} + + +/* + * returns previous event in history and shifts pointer accordingly + */ +HIST_ENTRY * +previous_history(void) +{ + + return _move_history(H_PREV); +} + + +/* + * returns next event in history and shifts pointer accordingly + */ +HIST_ENTRY * +next_history(void) +{ + + return _move_history(H_NEXT); +} + + +/* + * searches for first history event containing the str + */ +int +history_search(const char *str, int direction) +{ + HistEvent ev; + const char *strp; + int curr_num; + + if (history(h, &ev, H_CURR) != 0) + return -1; + curr_num = ev.num; + + for (;;) { + if ((strp = strstr(ev.str, str)) != NULL) + return (int)(strp - ev.str); + if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) + break; + } + (void)history(h, &ev, H_SET, curr_num); + return -1; +} + + +/* + * searches for first history event beginning with str + */ +int +history_search_prefix(const char *str, int direction) +{ + HistEvent ev; + + return (history(h, &ev, direction < 0 ? + H_PREV_STR : H_NEXT_STR, str)); +} + + +/* + * search for event in history containing str, starting at offset + * abs(pos); continue backward, if pos<0, forward otherwise + */ +/* ARGSUSED */ +int +history_search_pos(const char *str, + int direction __attribute__((__unused__)), int pos) +{ + HistEvent ev; + int curr_num, off; + + off = (pos > 0) ? pos : -pos; + pos = (pos > 0) ? 1 : -1; + + if (history(h, &ev, H_CURR) != 0) + return -1; + curr_num = ev.num; + + if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0) + return -1; + + for (;;) { + if (strstr(ev.str, str)) + return off; + if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) + break; + } + + /* set "current" pointer back to previous state */ + (void)history(h, &ev, + pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); + + return -1; +} + + +/********************************/ +/* completion functions */ + +char * +tilde_expand(char *name) +{ + return fn_tilde_expand(name); +} + +char * +filename_completion_function(const char *name, int state) +{ + return fn_filename_completion_function(name, state); +} + +/* + * a completion generator for usernames; returns _first_ username + * which starts with supplied text + * text contains a partial username preceded by random character + * (usually '~'); state resets search from start (??? should we do that anyway) + * it's callers responsibility to free returned value + */ +char * +username_completion_function(const char *text, int state) +{ + struct passwd *pass = NULL; + + if (text[0] == '\0') + return NULL; + + if (*text == '~') + text++; + + if (state == 0) + setpwent(); + + while ( + (pass = getpwent()) != NULL + && text[0] == pass->pw_name[0] + && strcmp(text, pass->pw_name) == 0) + continue; + + if (pass == NULL) { + endpwent(); + return NULL; + } + return strdup(pass->pw_name); +} + + +/* + * el-compatible wrapper to send TSTP on ^Z + */ +/* ARGSUSED */ +static unsigned char +_el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) +{ + (void)kill(0, SIGTSTP); + return CC_NORM; +} + +/* + * Display list of strings in columnar format on readline's output stream. + * 'matches' is list of strings, 'len' is number of strings in 'matches', + * 'max' is maximum length of string in 'matches'. + */ +void +rl_display_match_list(char **matches, int len, int max) +{ + + fn_display_match_list(e, matches, (size_t)len, (size_t)max); +} + +static const char * +/*ARGSUSED*/ +_rl_completion_append_character_function(const char *dummy + __attribute__((__unused__))) +{ + static char buf[2]; + buf[0] = (char)rl_completion_append_character; + buf[1] = '\0'; + return buf; +} + + +/* + * complete word at current point + */ +/* ARGSUSED */ +int +rl_complete(int ignore __attribute__((__unused__)), int invoking_key) +{ +#ifdef WIDECHAR + static ct_buffer_t wbreak_conv, sprefix_conv; +#endif + char *breakchars; + + if (h == NULL || e == NULL) + rl_initialize(); + + if (rl_inhibit_completion) { + char arr[2]; + arr[0] = (char)invoking_key; + arr[1] = '\0'; + el_insertstr(e, arr); + return CC_REFRESH; + } + + if (rl_completion_word_break_hook != NULL) + breakchars = (*rl_completion_word_break_hook)(); + else + breakchars = rl_basic_word_break_characters; + + /* Just look at how many global variables modify this operation! */ + return fn_complete(e, + (CPFunction *)rl_completion_entry_function, + rl_attempted_completion_function, + ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), + ct_decode_string(breakchars, &sprefix_conv), + _rl_completion_append_character_function, + (size_t)rl_completion_query_items, + &rl_completion_type, &rl_attempted_completion_over, + &rl_point, &rl_end); + + +} + + +/* ARGSUSED */ +static unsigned char +_el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) +{ + return (unsigned char)rl_complete(0, ch); +} + +/* + * misc other functions + */ + +/* + * bind key c to readline-type function func + */ +int +rl_bind_key(int c, rl_command_func_t *func) +{ + int retval = -1; + + if (h == NULL || e == NULL) + rl_initialize(); + + if (func == rl_insert) { + /* XXX notice there is no range checking of ``c'' */ + e->el_map.key[c] = ED_INSERT; + retval = 0; + } + return retval; +} + + +/* + * read one key from input - handles chars pushed back + * to input stream also + */ +int +rl_read_key(void) +{ + char fooarr[2 * sizeof(int)]; + + if (e == NULL || h == NULL) + rl_initialize(); + + return el_getc(e, fooarr); +} + + +/* + * reset the terminal + */ +/* ARGSUSED */ +void +rl_reset_terminal(const char *p __attribute__((__unused__))) +{ + + if (h == NULL || e == NULL) + rl_initialize(); + el_reset(e); +} + + +/* + * insert character ``c'' back into input stream, ``count'' times + */ +int +rl_insert(int count, int c) +{ + char arr[2]; + + if (h == NULL || e == NULL) + rl_initialize(); + + /* XXX - int -> char conversion can lose on multichars */ + arr[0] = (char)c; + arr[1] = '\0'; + + for (; count > 0; count--) + el_push(e, arr); + + return 0; +} + +int +rl_insert_text(const char *text) +{ + if (!text || *text == 0) + return 0; + + if (h == NULL || e == NULL) + rl_initialize(); + + if (el_insertstr(e, text) < 0) + return 0; + return (int)strlen(text); +} + +/*ARGSUSED*/ +int +rl_newline(int count __attribute__((__unused__)), + int c __attribute__((__unused__))) +{ + /* + * Readline-4.0 appears to ignore the args. + */ + return rl_insert(1, '\n'); +} + +/*ARGSUSED*/ +static unsigned char +rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) +{ + if (map[c] == NULL) + return CC_ERROR; + + _rl_update_pos(); + + (*map[c])(NULL, c); + + /* If rl_done was set by the above call, deal with it here */ + if (rl_done) + return CC_EOF; + + return CC_NORM; +} + +int +rl_add_defun(const char *name, Function *fun, int c) +{ + char dest[8]; + if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) + return -1; + map[(unsigned char)c] = fun; + el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); + vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); + el_set(e, EL_BIND, dest, name, NULL); + return 0; +} + +void +rl_callback_read_char(void) +{ + int count = 0, done = 0; + const char *buf = el_gets(e, &count); + char *wbuf; + + if (buf == NULL || count-- <= 0) + return; + if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) + done = 1; + if (buf[count] == '\n' || buf[count] == '\r') + done = 2; + + if (done && rl_linefunc != NULL) { + el_set(e, EL_UNBUFFERED, 0); + if (done == 2) { + if ((wbuf = strdup(buf)) != NULL) + wbuf[count] = '\0'; + } else + wbuf = NULL; + (*(void (*)(const char *))rl_linefunc)(wbuf); + //el_set(e, EL_UNBUFFERED, 1); + } +} + +void +rl_callback_handler_install(const char *prompt, VCPFunction *linefunc) +{ + if (e == NULL) { + rl_initialize(); + } + (void)rl_set_prompt(prompt); + rl_linefunc = linefunc; + el_set(e, EL_UNBUFFERED, 1); +} + +void +rl_callback_handler_remove(void) +{ + el_set(e, EL_UNBUFFERED, 0); + rl_linefunc = NULL; +} + +void +rl_redisplay(void) +{ + char a[2]; + a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; + a[1] = '\0'; + el_push(e, a); +} + +int +rl_get_previous_history(int count, int key) +{ + char a[2]; + a[0] = (char)key; + a[1] = '\0'; + while (count--) + el_push(e, a); + return 0; +} + +void +/*ARGSUSED*/ +rl_prep_terminal(int meta_flag __attribute__((__unused__))) +{ + el_set(e, EL_PREP_TERM, 1); +} + +void +rl_deprep_terminal(void) +{ + el_set(e, EL_PREP_TERM, 0); +} + +int +rl_read_init_file(const char *s) +{ + return el_source(e, s); +} + +int +rl_parse_and_bind(const char *line) +{ + const char **argv; + int argc; + Tokenizer *tok; + + tok = tok_init(NULL); + tok_str(tok, line, &argc, &argv); + argc = el_parse(e, argc, argv); + tok_end(tok); + return argc ? 1 : 0; +} + +int +rl_variable_bind(const char *var, const char *value) +{ + /* + * The proper return value is undocument, but this is what the + * readline source seems to do. + */ + return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; +} + +void +rl_stuff_char(int c) +{ + char buf[2]; + + buf[0] = (char)c; + buf[1] = '\0'; + el_insertstr(e, buf); +} + +static int +_rl_event_read_char(EditLine *el, char *cp) +{ + int n; + ssize_t num_read = 0; + + *cp = '\0'; + while (rl_event_hook) { + + (*rl_event_hook)(); + +#if defined(FIONREAD) + if (ioctl(el->el_infd, FIONREAD, &n) < 0) + return -1; + if (n) + num_read = read(el->el_infd, cp, (size_t)1); + else + num_read = 0; +#elif defined(F_SETFL) && defined(O_NDELAY) + if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) + return -1; + if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) + return -1; + num_read = read(el->el_infd, cp, 1); + if (fcntl(el->el_infd, F_SETFL, n)) + return -1; +#else + /* not non-blocking, but what you gonna do? */ + num_read = read(el->el_infd, cp, 1); + return -1; +#endif + + if (num_read < 0 && errno == EAGAIN) + continue; + if (num_read == 0) + continue; + break; + } + if (!rl_event_hook) + el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); + return (int)num_read; +} + +static void +_rl_update_pos(void) +{ + const LineInfo *li = el_line(e); + + rl_point = (int)(li->cursor - li->buffer); + rl_end = (int)(li->lastchar - li->buffer); +} + +void +rl_get_screen_size(int *rows, int *cols) +{ + if (rows) + el_get(e, EL_GETTC, "li", rows, (void *)0); + if (cols) + el_get(e, EL_GETTC, "co", cols, (void *)0); +} + +void +rl_set_screen_size(int rows, int cols) +{ + char buf[64]; + (void)snprintf(buf, sizeof(buf), "%d", rows); + el_set(e, EL_SETTC, "li", buf, NULL); + (void)snprintf(buf, sizeof(buf), "%d", cols); + el_set(e, EL_SETTC, "co", buf, NULL); +} + +char ** +rl_completion_matches(const char *str, rl_compentry_func_t *fun) +{ + size_t len, max, i, j, min; + char **list, *match, *a, *b; + + len = 1; + max = 10; + if ((list = el_malloc(max * sizeof(*list))) == NULL) + return NULL; + + while ((match = (*fun)(str, (int)(len - 1))) != NULL) { + list[len++] = match; + if (len == max) { + char **nl; + max += 10; + if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) + goto out; + list = nl; + } + } + if (len == 1) + goto out; + list[len] = NULL; + if (len == 2) { + if ((list[0] = strdup(list[1])) == NULL) + goto out; + return list; + } + qsort(&list[1], len - 1, sizeof(*list), + (int (*)(const void *, const void *)) strcmp); + min = SIZE_T_MAX; + for (i = 1, a = list[i]; i < len - 1; i++, a = b) { + b = list[i + 1]; + for (j = 0; a[j] && a[j] == b[j]; j++) + continue; + if (min > j) + min = j; + } + if (min == 0 && *str) { + if ((list[0] = strdup(str)) == NULL) + goto out; + } else { + if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL) + goto out; + (void)memcpy(list[0], list[1], min); + list[0][min] = '\0'; + } + return list; + +out: + el_free(list); + return NULL; +} + +char * +rl_filename_completion_function (const char *text, int state) +{ + return fn_filename_completion_function(text, state); +} + +void +rl_forced_update_display(void) +{ + el_set(e, EL_REFRESH); +} + +int +_rl_abort_internal(void) +{ + el_beep(e); + longjmp(topbuf, 1); + /*NOTREACHED*/ +} + +int +_rl_qsort_string_compare(char **s1, char **s2) +{ + return strcoll(*s1, *s2); +} + +HISTORY_STATE * +history_get_history_state(void) +{ + HISTORY_STATE *hs; + + if ((hs = el_malloc(sizeof(*hs))) == NULL) + return NULL; + hs->length = history_length; + return hs; +} + +int +/*ARGSUSED*/ +rl_kill_text(int from __attribute__((__unused__)), + int to __attribute__((__unused__))) +{ + return 0; +} + +Keymap +rl_make_bare_keymap(void) +{ + return NULL; +} + +Keymap +rl_get_keymap(void) +{ + return NULL; +} + +void +/*ARGSUSED*/ +rl_set_keymap(Keymap k __attribute__((__unused__))) +{ +} + +int +/*ARGSUSED*/ +rl_generic_bind(int type __attribute__((__unused__)), + const char * keyseq __attribute__((__unused__)), + const char * data __attribute__((__unused__)), + Keymap k __attribute__((__unused__))) +{ + return 0; +} + +int +/*ARGSUSED*/ +rl_bind_key_in_map(int key __attribute__((__unused__)), + rl_command_func_t *fun __attribute__((__unused__)), + Keymap k __attribute__((__unused__))) +{ + return 0; +} + +/* unsupported, but needed by python */ +void +rl_cleanup_after_signal(void) +{ +} + +int +rl_on_new_line(void) +{ + return 0; +} + +void +rl_free_line_state(void) +{ +} |