libedit/examples/tc1.c

/*	$NetBSD: tc1.c,v 1.5 2010/04/18 21:17:47 christos Exp $	*/

/*-
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Christos Zoulas of Cornell University.
 *
 * 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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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"
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1992, 1993\n\
	The Regents of the University of California.  All rights reserved.\n");
#endif /* not lint */

#if !defined(lint) && !defined(SCCSID)
#if 0
static char sccsid[] = "@(#)test.c	8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: tc1.c,v 1.5 2010/04/18 21:17:47 christos Exp $");
#endif
#endif /* not lint && not SCCSID */

/* from src/sys/sys/cdefs.h */
#ifndef __UNCONST
# define __UNCONST(a) ((void *)(unsigned long)(const void *)(a))
#endif

/*
 * test.c: A little test program
 */
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <sys/wait.h>
#include <ctype.h>
#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <locale.h>

#include "histedit.h"

static int continuation = 0;
volatile sig_atomic_t gotsig = 0;

static	unsigned char	complete(EditLine *, int);
	int	main(int, char **);
static	char   *prompt(EditLine *);
static	void	sig(int);

static char *
prompt(EditLine *el)
{
	static char a[] = "\1\033[7m\1Edit$\1\033[0m\1 ";
	static char b[] = "Edit> ";

	return (continuation ? b : a);
}

static void
sig(int i)
{
	gotsig = i;
}

static unsigned char
complete(EditLine *el, int ch)
{
	DIR *dd = opendir(".");
	struct dirent *dp;
	const char* ptr;
	const LineInfo *lf = el_line(el);
	int len;
	int res = CC_ERROR;

	/*
	 * Find the last word
	 */
	for (ptr = lf->cursor - 1;
	    !isspace((unsigned char)*ptr) && ptr > lf->buffer; ptr--)
		continue;
	len = lf->cursor - ++ptr;

	for (dp = readdir(dd); dp != NULL; dp = readdir(dd)) {
		if (len > strlen(dp->d_name))
			continue;
		if (strncmp(dp->d_name, ptr, len) == 0) {
			if (el_insertstr(el, &dp->d_name[len]) == -1)
				res = CC_ERROR;
			else
				res = CC_REFRESH;
			break;
		}
	}

	closedir(dd);
	return res;
}

int
main(int argc, char *argv[])
{
	EditLine *el = NULL;
	int num;
	const char *buf;
	Tokenizer *tok;
#if 0
	int lastevent = 0;
#endif
	int ncontinuation;
	History *hist;
	HistEvent ev;

	(void) setlocale(LC_CTYPE, "");
	(void) signal(SIGINT, sig);
	(void) signal(SIGQUIT, sig);
	(void) signal(SIGHUP, sig);
	(void) signal(SIGTERM, sig);

	hist = history_init();		/* Init the builtin history	*/
					/* Remember 100 events		*/
	history(hist, &ev, H_SETSIZE, 100);

	tok  = tok_init(NULL);		/* Initialize the tokenizer	*/

					/* Initialize editline		*/
	el = el_init(*argv, stdin, stdout, stderr);

	el_set(el, EL_EDITOR, "vi");	/* Default editor is vi		*/
	el_set(el, EL_SIGNAL, 1);	/* Handle signals gracefully	*/
	el_set(el, EL_PROMPT_ESC, prompt, '\1');/* Set the prompt function */

			/* Tell editline to use this history interface	*/
	el_set(el, EL_HIST, history, hist);

					/* Add a user-defined function	*/
	el_set(el, EL_ADDFN, "ed-complete", "Complete argument", complete);

					/* Bind tab to it 		*/
	el_set(el, EL_BIND, "^I", "ed-complete", NULL);

	/*
	 * Bind j, k in vi command mode to previous and next line, instead
	 * of previous and next history.
	 */
	el_set(el, EL_BIND, "-a", "k", "ed-prev-line", NULL);
	el_set(el, EL_BIND, "-a", "j", "ed-next-line", NULL);

	/*
	 * Source the user's defaults file.
	 */
	el_source(el, NULL);

	while ((buf = el_gets(el, &num)) != NULL && num != 0)  {
		int ac, cc, co;
#ifdef DEBUG
		int i;
#endif
		const char **av;
		const LineInfo *li;
		li = el_line(el);
#ifdef DEBUG
		(void) fprintf(stderr, "==> got %d %s", num, buf);
		(void) fprintf(stderr, "  > li `%.*s_%.*s'\n",
		    (li->cursor - li->buffer), li->buffer,
		    (li->lastchar - 1 - li->cursor),
		    (li->cursor >= li->lastchar) ? "" : li->cursor);

#endif
		if (gotsig) {
			(void) fprintf(stderr, "Got signal %d.\n", gotsig);
			gotsig = 0;
			el_reset(el);
		}

		if (!continuation && num == 1)
			continue;

		ac = cc = co = 0;
		ncontinuation = tok_line(tok, li, &ac, &av, &cc, &co);
		if (ncontinuation < 0) {
			(void) fprintf(stderr, "Internal error\n");
			continuation = 0;
			continue;
		}
#ifdef DEBUG
		(void) fprintf(stderr, "  > nc %d ac %d cc %d co %d\n",
		    ncontinuation, ac, cc, co);
#endif
#if 0
		if (continuation) {
			/*
			 * Append to the right event in case the user
			 * moved around in history.
			 */
			if (history(hist, &ev, H_SET, lastevent) == -1)
				err(1, "%d: %s", lastevent, ev.str);
			history(hist, &ev, H_ADD , buf);
		} else {
			history(hist, &ev, H_ENTER, buf);
			lastevent = ev.num;
		}
#else
				/* Simpler */
		history(hist, &ev, continuation ? H_APPEND : H_ENTER, buf);
#endif

		continuation = ncontinuation;
		ncontinuation = 0;
		if (continuation)
			continue;
#ifdef DEBUG
		for (i = 0; i < ac; i++) {
			(void) fprintf(stderr, "  > arg# %2d ", i);
			if (i != cc)
				(void) fprintf(stderr, "`%s'\n", av[i]);
			else
				(void) fprintf(stderr, "`%.*s_%s'\n",
				    co, av[i], av[i] + co);
		}
#endif

		if (strcmp(av[0], "history") == 0) {
			int rv;

			switch (ac) {
			case 1:
				for (rv = history(hist, &ev, H_LAST); rv != -1;
				    rv = history(hist, &ev, H_PREV))
					(void) fprintf(stdout, "%4d %s",
					    ev.num, ev.str);
				break;

			case 2:
				if (strcmp(av[1], "clear") == 0)
					 history(hist, &ev, H_CLEAR);
				else
					 goto badhist;
				break;

			case 3:
				if (strcmp(av[1], "load") == 0)
					 history(hist, &ev, H_LOAD, av[2]);
				else if (strcmp(av[1], "save") == 0)
					 history(hist, &ev, H_SAVE, av[2]);
				break;

			badhist:
			default:
				(void) fprintf(stderr,
				    "Bad history arguments\n");
				break;
			}
		} else if (el_parse(el, ac, av) == -1) {
			switch (fork()) {
			case 0:
				execvp(av[0], (char *const *)__UNCONST(av));
				perror(av[0]);
				_exit(1);
				/*NOTREACHED*/
				break;

			case -1:
				perror("fork");
				break;

			default:
				if (wait(&num) == -1)
					perror("wait");
				(void) fprintf(stderr, "Exit %x\n", num);
				break;
			}
		}

		tok_reset(tok);
	}

	el_end(el);
	tok_end(tok);
	history_end(hist);

	return (0);
}