/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <stdio.h>
#include <ctype.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "error.h"

FILE	*errorfile;
FILE	*queryfile;
int	nerrors = 0;
Eptr	er_head;
Eptr	*errors;

int	nfiles = 0;
Eptr	**files;	/* array of pointers into errors */
int	language = INCC;

char	*currentfilename = "????";
char	*processname;
char	im_on[] = "/dev/tty";	/* my tty name */

boolean	query = FALSE;		/* query the operator if touch files */
boolean	notouch = FALSE;	/* don't touch ANY files */
boolean	terse	= FALSE;	/* Terse output */

char	*suffixlist = ".*";	/* initially, can touch any file */

static void try(char *name, int argc, char **argv);
static void forkvi(int argc, char **argv);
static int errorsort(const void *arg1, const void *arg2);


/*
 *	error [-I ignorename] [-n] [-q] [-t suffixlist] [-s] [-v] [infile]
 *
 *	-T:	terse output
 *
 *	-I:	the following name, `ignorename' contains a list of
 *		function names that are not to be treated as hard errors.
 *		Default: ~/.errorsrc
 *
 *	-n:	don't touch ANY files!
 *
 *	-q:	The user is to be queried before touching each
 *		file; if not specified, all files with hard, non
 *		ignorable errors are touched (assuming they can be).
 *
 *	-t:	touch only files ending with the list of suffices, each
 *		suffix preceded by a dot.
 *		eg, -t .c.y.l
 *		will touch only files ending with .c, .y or .l
 *
 *	-s:	print a summary of the error's categories.
 *
 *	-v:	after touching all files, overlay vi(1), ex(1) or ed(1)
 *		on top of error, entered in the first file with
 *		an error in it, with the appropriate editor
 *		set up to use the "next" command to get the other
 *		files containing errors.
 *
 *	-p:	(obsolete: for older versions of pi without bug
 *		fix regarding printing out the name of the main file
 *		with an error in it)
 *		Take the following argument and use it as the name of
 *		the pascal source file, suffix .p
 *
 *	-E:	show the errors in sorted order; intended for
 *		debugging.
 *
 *	-S:	show the errors in unsorted order
 *		(as they come from the error file)
 *
 *	infile:	The error messages come from this file.
 *		Default: stdin
 */
int
main(int argc, char *argv[])
{
	char	*cp;
	char	*ignorename = 0;
	int	ed_argc;
	char	**ed_argv;		/* return from touchfiles */
	boolean	show_errors = FALSE;
	boolean	Show_Errors = FALSE;
	boolean	pr_summary = FALSE;
	boolean	edit_files = FALSE;

	processname = argv[0];

	errorfile = stdin;
	if (argc > 1) {
		for (; (argc > 1) && (argv[1][0] == '-'); argc--, argv++) {
			for (cp = argv[1] + 1; *cp; cp++) {
				switch (*cp) {
				default:
					(void) fprintf(stderr,
					    "%s: -%c: Unknown flag\n",
					    processname, *cp);
					break;
				case 'n':
					notouch = TRUE;
					break;
				case 'q':
					query = TRUE;
					break;
				case 'S':
					Show_Errors = TRUE;
					break;
				case 's':
					pr_summary = TRUE;
					break;
				case 'v':
					edit_files = TRUE;
					break;
				case 'T':
					terse = TRUE;
					break;
				case 't':
					*cp-- = 0;
					argv++;
					argc--;
					if (argc > 1) {
						suffixlist = argv[1];
					}
					break;
				case 'I':	/* ignore file name */
					*cp-- = 0;
					argv++;
					argc--;
					if (argc > 1)
						ignorename = argv[1];
					break;
				}
			}
		}
	}
	if (notouch)
		suffixlist = 0;
	if (argc > 1) {
		if (argc > 3) {
			(void) fprintf(stderr,
			    "%s: Only takes 0 or 1 arguments\n",
			    processname);
			exit(3);
		}
		if ((errorfile = fopen(argv[1], "r")) == NULL) {
			(void) fprintf(stderr,
			    "%s: %s: No such file or directory for "
			    "reading errors.\n", processname, argv[1]);
			exit(4);
		}
	}
	if ((queryfile = fopen(im_on, "r")) == NULL) {
		if (query) {
			(void) fprintf(stderr,
			    "%s: Can't open \"%s\" to query the user.\n",
			    processname, im_on);
			exit(9);
		}
	}
	if (signal(SIGINT, onintr) == SIG_IGN)
		(void) signal(SIGINT, SIG_IGN);
	if (signal(SIGTERM, onintr) == SIG_IGN)
		(void) signal(SIGTERM, SIG_IGN);
	getignored(ignorename);
	eaterrors(&nerrors, &errors);
	if (Show_Errors)
		printerrors(TRUE, nerrors, errors);
	qsort(errors, nerrors, sizeof (Eptr), errorsort);
	if (show_errors)
		printerrors(FALSE, nerrors, errors);
	findfiles(nerrors, errors, &nfiles, &files);
	if (pr_summary) {
		if (nunknown)
			(void) fprintf(stdout,
			    "%d Errors are unclassifiable.\n",
			    nunknown);
		if (nignore)
			(void) fprintf(stdout,
			    "%d Errors are classifiable, but totally "
			    "discarded.\n", nignore);
		if (nsyncerrors)
			(void) fprintf(stdout,
			    "%d Errors are synchronization errors.\n",
			    nsyncerrors);
		if (nignore)
			(void) fprintf(stdout,
			    "%d Errors are discarded because they "
			    "refer to sacrosanct files.\n", ndiscard);
		if (nnulled)
			(void) fprintf(stdout,
			    "%d Errors are nulled because they refer "
			    "to specific functions.\n", nnulled);
		if (nnonspec)
			(void) fprintf(stdout,
			    "%d Errors are not specific to any file.\n",
			    nnonspec);
		if (nthisfile)
			(void) fprintf(stdout,
			    "%d Errors are specific to a given file, "
			    "but not to a line.\n", nthisfile);
		if (ntrue)
			(void) fprintf(stdout,
			    "%d Errors are true errors, and can be "
			    "inserted into the files.\n", ntrue);
	}
	filenames(nfiles, files);
	(void) fflush(stdout);
	if (touchfiles(nfiles, files, &ed_argc, &ed_argv) && edit_files)
		forkvi(ed_argc, ed_argv);
	return (0);
}

static void
forkvi(int argc, char **argv)
{
	if (query) {
		switch (inquire(terse
		    ? "Edit? "
		    : "Do you still want to edit the files you touched? ")) {
		case Q_NO:
		case Q_no:
			return;
		default:
			break;
		}
	}
	/*
	 *	ed_agument's first argument is
	 *	a vi/ex compatabile search argument
	 *	to find the first occurance of ###
	 */
	try("vi", argc, argv);
	try("ex", argc, argv);
	try("ed", argc-1, argv+1);
	(void) fprintf(stdout, "Can't find any editors.\n");
}

static void
try(char *name, int argc, char **argv)
{
	argv[0] = name;
	wordvprint(stdout, argc, argv);
	(void) fprintf(stdout, "\n");
	(void) fflush(stderr);
	(void) fflush(stdout);
	(void) sleep(2);
	if (freopen(im_on, "r", stdin) == NULL)
		return;
	if (freopen(im_on, "w", stdout) == NULL)
		return;
	(void) execvp(name, argv);
}

static int
errorsort(const void *arg1, const void *arg2)
{
	Eptr	*epp1 = (Eptr *)arg1;
	Eptr	*epp2 = (Eptr *)arg2;
	Eptr	ep1, ep2;
	int	order;

	/*
	 *	Sort by:
	 *	1)	synchronization, non specific, discarded errors first;
	 *	2)	nulled and true errors last
	 *		a)	grouped by similar file names
	 *			1)	grouped in ascending line number
	 */
	ep1 = *epp1; ep2 = *epp2;
	if (ep1 == 0 || ep2 == 0)
		return (0);
	if ((NOTSORTABLE(ep1->error_e_class)) ^
	    (NOTSORTABLE(ep2->error_e_class))) {
		return (NOTSORTABLE(ep1->error_e_class) ? -1 : 1);
	}
	if (NOTSORTABLE(ep1->error_e_class))	/* then both are */
		return (ep1->error_no - ep2->error_no);
	order = strcmp(ep1->error_text[0], ep2->error_text[0]);
	if (order == 0) {
		return (ep1->error_line - ep2->error_line);
	}
	return (order);
}