/*
 * 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);
}