Пример #1
0
/**
 * gpath_put: put path name
 *
 *	@param[in]	path	path name
 *	@param[in]	type	path type
 *			GPATH_SOURCE: source file,
 *			GPATH_OTHER: other file
 */
const char *
gpath_put(const char *path, int type)
{
	static char sfid[MAXFIDLEN];
	STATIC_STRBUF(sb);

	assert(opened > 0);
	if (_mode == 1 && created)
		return "";
	if (dbop_get(dbop, path) != NULL)
		return "";
	/*
	 * generate new file id for the path.
	 */
	snprintf(sfid, sizeof(sfid), "%d", _nextkey++);
	/*
	 * path => fid mapping.
	 */
	strbuf_clear(sb);
	strbuf_puts(sb, sfid);
	dbop_put_path(dbop, path, strbuf_value(sb), type == GPATH_OTHER ? "o" : NULL);
	/*
	 * fid => path mapping.
	 */
	strbuf_clear(sb);
	strbuf_puts(sb, path);
	dbop_put_path(dbop, sfid, strbuf_value(sb), type == GPATH_OTHER ? "o" : NULL);
	return (const char *)sfid;
}
Пример #2
0
/*
 * gpath_put: put path name
 *
 *	i)	path	path name
 *	i)	type	path type
 *			GPATH_SOURCE: source file
 *			GPATH_OTHER: other file
 */
void
gpath_put(const char *path, int type)
{
	char fid[MAXFIDLEN];
	STATIC_STRBUF(sb);

	assert(opened > 0);
	if (_mode == 1 && created)
		return;
	if (dbop_get(dbop, path) != NULL)
		return;
	/*
	 * generate new file id for the path.
	 */
	snprintf(fid, sizeof(fid), "%d", _nextkey++);
	/*
	 * path => fid mapping.
	 */
	strbuf_clear(sb);
	strbuf_puts0(sb, fid);
	if (type == GPATH_OTHER)
		strbuf_puts0(sb, "o");
	dbop_put_withlen(dbop, path, strbuf_value(sb), strbuf_getlen(sb));
	/*
	 * fid => path mapping.
	 */
	strbuf_clear(sb);
	strbuf_puts0(sb, path);
	if (type == GPATH_OTHER)
		strbuf_puts0(sb, "o");
	dbop_put_withlen(dbop, fid, strbuf_value(sb), strbuf_getlen(sb));
}
Пример #3
0
/**
 * is_defined_in_GTAGS: whether or not the name is defined in #GTAGS.
 *
 *	@param[in]	gtop
 *	@param[in]	name	tag name
 *	@return		0: not defined, 1: defined
 *
 * @note It is assumed that the input stream is sorted by the tag name.
 */
static int
is_defined_in_GTAGS(GTOP *gtop, const char *name)
{
	static char prev_name[MAXTOKEN+1];
	static int prev_result;

	if (!strcmp(name, prev_name))
		return prev_result;
	strlimcpy(prev_name, name, sizeof(prev_name));
	return prev_result = dbop_get(gtop->gtags, prev_name) ? 1 : 0;
}
Пример #4
0
/**
 * gpath_fid2path: convert id into path
 *
 *	@param[in]	fid	file id
 *	@param[out]	type	path type
 *			GPATH_SOURCE: source file,
 *			GPATH_OTHER: other file
 *	@return		path name
 */
const char *
gpath_fid2path(const char *fid, int *type)
{
	const char *path = dbop_get(dbop, fid);
	assert(opened > 0);
	if (path && type) {
		const char *flag = dbop_getflag(dbop);
		*type = (*flag == 'o') ? GPATH_OTHER : GPATH_SOURCE;
	}
	return path;
}
Пример #5
0
/**
 * gpath_path2fid: convert path into id
 *
 *	@param[in]	path	path name
 *	@param[out]	type	path type
 *			GPATH_SOURCE: source file,
 *			GPATH_OTHER: other file
 *	@return		file id
 */
const char *
gpath_path2fid(const char *path, int *type)
{
	const char *fid = dbop_get(dbop, path);
	assert(opened > 0);
	if (fid && type) {
		const char *flag = dbop_getflag(dbop);
		*type = (*flag == 'o') ? GPATH_OTHER : GPATH_SOURCE;
			
	}
	return fid;
}
Пример #6
0
/**
 * gpath_delete: delete specified path record
 *
 *	@param[in]	path	path name
 */
void
gpath_delete(const char *path)
{
	const char *fid;

	assert(opened > 0);
	assert(_mode == 2);
	assert(path[0] == '.' && path[1] == '/');
	fid = dbop_get(dbop, path);
	if (fid == NULL)
		return;
	dbop_delete(dbop, fid);
	dbop_delete(dbop, path);
}
Пример #7
0
static void
put_syms(int type, const char *tag, int lno, const char *path, const char *line_image, void *arg)
{
	struct parsefile_data *data = arg;
	const char *key;

	if (format == FORMAT_PATH && data->count > 0)
		return;
	switch (type) {
	case PARSER_DEF:
		if (!(data->target & TARGET_DEF))
			return;
		break;
	case PARSER_REF_SYM:
		if (!(data->target & (TARGET_REF | TARGET_SYM)))
			return;
		/*
		 * extract method when class method definition.
		 *
		 * Ex: Class::method(...)
		 *
		 * key	= 'method'
		 * data = 'Class::method  103 ./class.cpp ...'
		 */
		if (data->extractmethod) {
			if ((key = locatestring(tag, ".", MATCH_LAST)) != NULL)
				key++;
			else if ((key = locatestring(tag, "::", MATCH_LAST)) != NULL)
				key += 2;
			else
				key = tag;
		} else {
			key = tag;
		}
		if (data->target == TARGET_REF || data->target == TARGET_SYM) {
			if (dbop_get(data->dbop, key) != NULL) {
				if (!(data->target & TARGET_REF))
					return;
			} else {
				if (!(data->target & TARGET_SYM))
					return;
			}
		}
		break;
	default:
		return;
	}
	convert_put_using(data->cv, tag, path, lno, line_image, data->fid);
	data->count++;
}
Пример #8
0
/**
 * dbop_getoption: get option
 */
const char *
dbop_getoption(DBOP *dbop, const char *key)
{
	static char buf[1024];
	const char *p;

	if ((p = dbop_get(dbop, key)) == NULL)
		return NULL;
	if (dbop->lastsize < strlen(key))
		die("invalid format (dbop_getoption).");
	for (p += strlen(key); *p && isspace((unsigned char)*p); p++)
		;
	strlimcpy(buf, p, sizeof(buf));
	return buf;
}
Пример #9
0
/**
 * Tag command that supports referenced tag must call this function
 * to decide whether or not the tag is defined.
 */
int
defined(const char *name)
{
	if (dbop == NULL) {
		const char *dbpath;

		/*
		 * gtags(1) set GTAGSDBPATH to the path GTAGS exist.
		 */
		if (!(dbpath = getenv("GTAGSDBPATH")))
			dbpath = ".";
		dbop = dbop_open(makepath(dbpath, "GTAGS", NULL), 0, 0, 0);
		if (dbop == NULL)
			die("'GTAGS' not found.");
	}
	if (dbop_get(dbop, name))
		return 1;
	return 0;
}
Пример #10
0
/*
 * gpath_open: open gpath tag file
 *
 *	i)	dbpath	GTAGSDBPATH
 *	i)	mode	0: read only
 *			1: create
 *			2: modify
 *	r)		0: normal
 *			-1: error
 */
int
gpath_open(const char *dbpath, int mode)
{
	if (opened > 0) {
		if (mode != _mode)
			die("duplicate open with different mode.");
		opened++;
		return 0;
	}
	/*
	 * We create GPATH just first time.
	 */
	_mode = mode;
	if (mode == 1 && created)
		mode = 0;
	dbop = dbop_open(makepath(dbpath, dbname(GPATH), NULL), mode, 0644, 0);
	if (dbop == NULL)
		return -1;
	if (mode == 1) {
		dbop_putversion(dbop, create_version);
		_nextkey = 1;
		
	} else {
		int format_version;
		const char *path = dbop_get(dbop, NEXTKEY);

		if (path == NULL)
			die("nextkey not found in GPATH.");
		_nextkey = atoi(path);
		format_version = dbop_getversion(dbop);
		if (format_version > support_version)
			die("GPATH seems new format. Please install the latest GLOBAL.");
		else if (format_version < support_version)
                        die("GPATH seems older format. Please remake tag files."); 
	}
	opened++;
	return 0;
}
Пример #11
0
int
main(int argc, char **argv)
{
	char dbpath[MAXPATHLEN];
	char cwd[MAXPATHLEN];
	STRBUF *sb = strbuf_open(0);
	int optchar;
	int option_index = 0;
	STATISTICS_TIME *tim;

	while ((optchar = getopt_long(argc, argv, "cd:f:iuIn:oOqvwse", long_options, &option_index)) != EOF) {
		switch (optchar) {
		case 0:
			/* already flags set */
			break;
		case OPT_CONFIG:
			show_config = 1;
			if (optarg)
				config_name = optarg;
			break;
		case OPT_GTAGSCONF:
			gtagsconf = optarg;
			break;
		case OPT_GTAGSLABEL:
			gtagslabel = optarg;
			break;
		case OPT_PATH:
			do_path = 1;
			if (!strcmp("absolute", optarg))
				convert_type = PATH_ABSOLUTE;
			else if (!strcmp("relative", optarg))
				convert_type = PATH_RELATIVE;
			else if (!strcmp("through", optarg))
				convert_type = PATH_THROUGH;
			else
				die("Unknown path type.");
			break;
		case OPT_SINGLE_UPDATE:
			iflag++;
			single_update = optarg;
			break;
		case OPT_ENCODE_PATH:
			if (strlen(optarg) > 255)
				die("too many encode chars.");
			if (strchr(optarg, '/') || strchr(optarg, '.'))
				die("cannot encode '/' and '.' in the path.");
			set_encode_chars((unsigned char *)optarg);
			break;
		case 'c':
			cflag++;
			break;
		case 'd':
			dump_target = optarg;
			break;
		case 'f':
			file_list = optarg;
			break;
		case 'i':
			iflag++;
			break;
		case 'u':
			uflag++;
			iflag++;
			break;
		case 'I':
			Iflag++;
			break;
		case 'o':
			/*
			 * Though the -o(--omit-gsyms) was removed, this code
			 * is left for compatibility.
			 */
			break;
		case 'O':
			Oflag++;
			break;
		case 'q':
			qflag++;
			setquiet();
			break;
		case 'w':
			wflag++;
			break;
		case 'v':
			vflag++;
			setverbose();
			break;
		default:
			usage();
			break;
		}
	}
	if (gtagsconf) {
		char path[MAXPATHLEN];

		if (realpath(gtagsconf, path) == NULL)
			die("%s not found.", gtagsconf);
		set_env("GTAGSCONF", path);
	}
	if (gtagslabel) {
		set_env("GTAGSLABEL", gtagslabel);
	}
	if (qflag)
		vflag = 0;
	if (show_version)
		version(NULL, vflag);
	if (show_help)
		help();

	argc -= optind;
        argv += optind;

	/* If dbpath is specified, -O(--objdir) option is ignored. */
	if (argc > 0)
		Oflag = 0;
	if (show_config) {
		if (config_name)
			printconf(config_name);
		else
			fprintf(stdout, "%s\n", getconfline());
		exit(0);
	} else if (do_path) {
		/*
		 * This is the main body of path filter.
		 * This code extract path name from tag line and
		 * replace it with the relative or the absolute path name.
		 *
		 * By default, if we are in src/ directory, the output
		 * should be converted like follws:
		 *
		 * main      10 ./src/main.c  main(argc, argv)\n
		 * main      22 ./libc/func.c   main(argc, argv)\n
		 *		v
		 * main      10 main.c  main(argc, argv)\n
		 * main      22 ../libc/func.c   main(argc, argv)\n
		 *
		 * Similarly, the --path=absolute option specified, then
		 *		v
		 * main      10 /prj/xxx/src/main.c  main(argc, argv)\n
		 * main      22 /prj/xxx/libc/func.c   main(argc, argv)\n
		 */
		STRBUF *ib = strbuf_open(MAXBUFLEN);
		CONVERT *cv;
		char *ctags_x;

		if (argc < 3)
			die("gtags --path: 3 arguments needed.");
		cv = convert_open(convert_type, FORMAT_CTAGS_X, argv[0], argv[1], argv[2], stdout);
		while ((ctags_x = strbuf_fgets(ib, stdin, STRBUF_NOCRLF)) != NULL)
			convert_put(cv, ctags_x);
		convert_close(cv);
		strbuf_close(ib);
		exit(0);
	} else if (dump_target) {
		/*
		 * Dump a tag file.
		 */
		DBOP *dbop = NULL;
		const char *dat = 0;
		int is_gpath = 0;

		char* target_file = NULL;
		if (!test("f", dump_target)) {
			target_file = strchr(dump_target, ':');
			if (target_file == NULL) 
				die("file '%s' not found", dump_target);

			*target_file++ = 0; //move to the next char, which starts the target file.
			if (!test("f", dump_target)) {
				die("file '%s' not found.", dump_target);
			}
		}

		if ((dbop = dbop_open(dump_target, 0, 0, DBOP_RAW)) == NULL)
			die("file '%s' is not a tag file.", dump_target);
		/*
		 * The file which has a NEXTKEY record is GPATH.
		 */
		if (dbop_get(dbop, NEXTKEY))
			is_gpath = 1;

		if (target_file && !is_gpath) {
			die("dump target_file can only be used with GPATH");
		}

		if (target_file) {
			dat = dbop_get(dbop, target_file);
			if (dat == NULL) {
				die("target_file %s not found in GPATH", target_file);
			}
			time_t t = gpath_mtime(dbop, target_file);
			printf("%d\n", t);
		} else {
			for (dat = dbop_first(dbop, NULL, NULL, 0); dat != NULL; dat = dbop_next(dbop)) {
				const char *flag = is_gpath ? dbop_getflag(dbop) : "";

				if (*flag)
					if (is_gpath) {
						time_t t = gpath_mtime(dbop, dbop->lastkey);
						printf("%s\t%s\t%s\t%s\n", dbop->lastkey, dat, flag, ctime(&t));
					} else
						printf("%s\t%s\t%s\n", dbop->lastkey, dat, flag);
				else
					printf("%s\t%s\n", dbop->lastkey, dat);
			}
		}
		dbop_close(dbop);
		exit(0);
	} else if (Iflag) {
		if (!usable("mkid"))
			die("mkid not found.");
	}

	/*
	 * If 'gtags.files' exists, use it as a file list.
	 * If the file_list other than "-" is given, it must be readable file.
	 */
	if (file_list == NULL && test("f", GTAGSFILES))
		file_list = GTAGSFILES;
	if (file_list && strcmp(file_list, "-")) {
		if (test("d", file_list))
			die("'%s' is a directory.", file_list);
		else if (!test("f", file_list))
			die("'%s' not found.", file_list);
		else if (!test("r", file_list))
			die("'%s' is not readable.", file_list);
	}
	/*
	 * Regularize the path name for single updating (--single-update).
	 */
	if (single_update) {
		static char regular_path_name[MAXPATHLEN];
		char *p = single_update;
		
		if (!test("f", p))
			die("'%s' not found.", p);
		if (isabspath(p))
			die("--single-update requires relative path name.");
		if (!(p[0] == '.' && p[1] == '/')) {
			snprintf(regular_path_name, MAXPATHLEN, "./%s", p);
			p = regular_path_name;
		}
		single_update = p;
	}
	if (!getcwd(cwd, MAXPATHLEN))
		die("cannot get current directory.");
	canonpath(cwd);
	/*
	 * Decide directory (dbpath) in which gtags make tag files.
	 *
	 * Gtags create tag files at current directory by default.
	 * If dbpath is specified as an argument then use it.
	 * If the -i option specified and both GTAGS and GRTAGS exists
	 * at one of the candidate directories then gtags use existing
	 * tag files.
	 */
	if (iflag) {
		if (argc > 0)
			realpath(*argv, dbpath);
		else if (!gtagsexist(cwd, dbpath, MAXPATHLEN, vflag))
			strlimcpy(dbpath, cwd, sizeof(dbpath));
	} else {
		if (argc > 0)
			realpath(*argv, dbpath);
		else if (Oflag) {
			char *objdir = getobjdir(cwd, vflag);

			if (objdir == NULL)
				die("Objdir not found.");
			strlimcpy(dbpath, objdir, sizeof(dbpath));
		} else
			strlimcpy(dbpath, cwd, sizeof(dbpath));
	}
	if (iflag && (!test("f", makepath(dbpath, dbname(GTAGS), NULL)) ||
		!test("f", makepath(dbpath, dbname(GRTAGS), NULL)) ||
		!test("f", makepath(dbpath, dbname(GPATH), NULL)))) {
		if (wflag)
			warning("GTAGS, GRTAGS or GPATH not found. -i option ignored.");
		iflag = 0;
	}
	if (!test("d", dbpath))
		die("directory '%s' not found.", dbpath);
	if (vflag)
		fprintf(stderr, "[%s] Gtags started.\n", now());
	/*
	 * load configuration file.
	 */
	openconf();
	if (getconfb("extractmethod"))
		extractmethod = 1;
	strbuf_reset(sb);
	if (getconfs("langmap", sb))
		langmap = check_strdup(strbuf_value(sb));
	strbuf_reset(sb);
	if (getconfs("gtags_parser", sb))
		gtags_parser = check_strdup(strbuf_value(sb));
	/*
	 * initialize parser.
	 */
	if (vflag && gtags_parser)
		fprintf(stderr, " Using plug-in parser.\n");
	parser_init(langmap, gtags_parser);
	if (vflag && file_list)
		fprintf(stderr, " Using '%s' as a file list.\n", file_list);
	/*
	 * Start statistics.
	 */
	init_statistics();
	/*
	 * incremental update.
	 */
	if (iflag) {
		/*
		 * Version check. If existing tag files are old enough
		 * gtagsopen() abort with error message.
		 */
		GTOP *gtop = gtags_open(dbpath, cwd, GTAGS, GTAGS_MODIFY, 0);
		gtags_close(gtop);
		/*
		 * GPATH is needed for incremental updating.
		 * Gtags check whether or not GPATH exist, since it may be
		 * removed by mistake.
		 */
		if (!test("f", makepath(dbpath, dbname(GPATH), NULL)))
			die("Old version tag file found. Please remake it.");
		(void)incremental(dbpath, cwd);
		print_statistics(statistics);
		exit(0);
	}
	/*
	 * create GTAGS and GRTAGS
	 */
	createtags(dbpath, cwd);
	/*
	 * create idutils index.
	 */
	if (Iflag) {
		tim = statistics_time_start("Time of creating ID");
		if (vflag)
			fprintf(stderr, "[%s] Creating indexes for idutils.\n", now());
		strbuf_reset(sb);
		strbuf_puts(sb, "mkid");
		if (vflag)
			strbuf_puts(sb, " -v");
		strbuf_sprintf(sb, " --file='%s/ID'", dbpath);
		if (vflag) {
#ifdef __DJGPP__
			if (is_unixy())	/* test for 4DOS as well? */
#endif
			strbuf_puts(sb, " 1>&2");
		} else {
			strbuf_puts(sb, " >/dev/null");
		}
		if (debug)
			fprintf(stderr, "executing mkid like: %s\n", strbuf_value(sb));
		if (system(strbuf_value(sb)))
			die("mkid failed: %s", strbuf_value(sb));
		if (chmod(makepath(dbpath, "ID", NULL), 0644) < 0)
			die("cannot chmod ID file.");
		statistics_time_end(tim);
	}
	if (vflag)
		fprintf(stderr, "[%s] Done.\n", now());
	closeconf();
	strbuf_close(sb);
	print_statistics(statistics);

	return 0;
}
Пример #12
0
int
main(int argc, char **argv)
{
    char dbpath[MAXPATHLEN];
    char cwd[MAXPATHLEN];
    STRBUF *sb = strbuf_open(0);
    int optchar;
    int option_index = 0;
    STATISTICS_TIME *tim;

    /*
     * Setup GTAGSCONF and GTAGSLABEL environment variable
     * according to the --gtagsconf and --gtagslabel option.
     */
    preparse_options(argc, argv);
    /*
     * Get the project root directory.
     */
    if (!vgetcwd(cwd, MAXPATHLEN))
        die("cannot get current directory.");
    canonpath(cwd);
    /*
     * Load configuration file.
     */
    openconf(cwd);
    configuration();
    setenv_from_config();
    {
        char *env = getenv("GTAGS_OPTIONS");
        if (env && *env)
            argv = prepend_options(&argc, argv, env);
    }
    logging_arguments(argc, argv);
    while ((optchar = getopt_long(argc, argv, "cd:f:iIn:oOqvwse", long_options, &option_index)) != EOF) {
        switch (optchar) {
        case 0:
            /* already flags set */
            break;
        case OPT_CONFIG:
            show_config = 1;
            if (optarg)
                config_name = optarg;
            break;
        case OPT_GTAGSCONF:
        case OPT_GTAGSLABEL:
            /* These options are already parsed in preparse_options() */
            break;
        case OPT_SINGLE_UPDATE:
            iflag++;
            single_update = optarg;
            break;
        case OPT_ACCEPT_DOTFILES:
            set_accept_dotfiles();
            break;
        case 'c':
            cflag++;
            break;
        case 'd':
            dump_target = optarg;
            break;
        case 'f':
            file_list = optarg;
            break;
        case 'i':
            iflag++;
            break;
        case 'I':
            Iflag++;
            break;
        case 'o':
            /*
             * Though the -o(--omit-gsyms) was removed, this code
             * is left for compatibility.
             */
            break;
        case 'O':
            Oflag++;
            break;
        case 'q':
            qflag++;
            setquiet();
            break;
        case 'w':
            wflag++;
            break;
        case 'v':
            vflag++;
            setverbose();
            break;
        default:
            usage();
            break;
        }
    }
    if (qflag)
        vflag = 0;
    if (show_version)
        version(NULL, vflag);
    if (show_help)
        help();

    argc -= optind;
    argv += optind;

    /* If dbpath is specified, -O(--objdir) option is ignored. */
    if (argc > 0)
        Oflag = 0;
    if (show_config) {
        openconf(setupdbpath(0) == 0 ? get_root() : NULL);
        if (config_name)
            printconf(config_name);
        else
            fprintf(stdout, "%s\n", getconfline());
        exit(0);
    } else if (dump_target) {
        /*
         * Dump a tag file.
         */
        DBOP *dbop = NULL;
        const char *dat = 0;
        int is_gpath = 0;

        if (!test("f", dump_target))
            die("file '%s' not found.", dump_target);
        if ((dbop = dbop_open(dump_target, 0, 0, DBOP_RAW)) == NULL)
            die("file '%s' is not a tag file.", dump_target);
        /*
         * The file which has a NEXTKEY record is GPATH.
         */
        if (dbop_get(dbop, NEXTKEY))
            is_gpath = 1;
        for (dat = dbop_first(dbop, NULL, NULL, 0); dat != NULL; dat = dbop_next(dbop)) {
            const char *flag = is_gpath ? dbop_getflag(dbop) : "";

            if (*flag)
                printf("%s\t%s\t%s\n", dbop->lastkey, dat, flag);
            else
                printf("%s\t%s\n", dbop->lastkey, dat);
        }
        dbop_close(dbop);
        exit(0);
    } else if (Iflag) {
#define REQUIRED_MKID_VERSION "4.5"
        char *p;

        if (!usable("mkid"))
            die("mkid not found.");
        if (read_first_line("mkid --version", sb))
            die("mkid cannot executed.");
        p = strrchr(strbuf_value(sb), ' ');
        if (p == NULL)
            die("invalid version string of mkid: %s", strbuf_value(sb));
        switch (check_version(p + 1, REQUIRED_MKID_VERSION)
#ifdef _WIN32
                || strcmp(p + 1, "3.2.99") == 0
#endif
               )  {
        case 1:
            break;	/* OK */
        case 0:
            die("mkid version %s or later is required.", REQUIRED_MKID_VERSION);
        default:
            die("invalid version string of mkid: %s", strbuf_value(sb));
        }
    }

    /*
     * If 'gtags.files' exists, use it as a file list.
     * If the file_list other than "-" is given, it must be readable file.
     */
    if (file_list == NULL && test("f", GTAGSFILES))
        file_list = GTAGSFILES;
    if (file_list && strcmp(file_list, "-")) {
        if (test("d", file_list))
            die("'%s' is a directory.", file_list);
        else if (!test("f", file_list))
            die("'%s' not found.", file_list);
        else if (!test("r", file_list))
            die("'%s' is not readable.", file_list);
    }
    /*
     * Regularize the path name for single updating (--single-update).
     */
    if (single_update) {
        static char regular_path_name[MAXPATHLEN];
        char *p = single_update;

        if (!test("f", p))
            die("'%s' not found.", p);
#if _WIN32 || __DJGPP__
        for (; *p; p++)
            if (*p == '\\')
                *p = '/';
        p = single_update;
#define LOCATEFLAG MATCH_AT_FIRST|IGNORE_CASE
#else
#define LOCATEFLAG MATCH_AT_FIRST
#endif
        if (isabspath(p)) {
            char *q = locatestring(p, cwd, LOCATEFLAG);

            if (q && *q == '/')
                snprintf(regular_path_name, MAXPATHLEN, "./%s", q + 1);
            else
                die("path '%s' is out of the project.", p);

        } else {
            if (p[0] == '.' && p[1] == '/')
                snprintf(regular_path_name, MAXPATHLEN, "%s", p);
            else
                snprintf(regular_path_name, MAXPATHLEN, "./%s", p);
        }
        single_update = regular_path_name;
    }
    /*
     * Decide directory (dbpath) in which gtags make tag files.
     *
     * Gtags create tag files at current directory by default.
     * If dbpath is specified as an argument then use it.
     * If the -i option specified and both GTAGS and GRTAGS exists
     * at one of the candidate directories then gtags use existing
     * tag files.
     */
    if (iflag) {
        if (argc > 0)
            realpath(*argv, dbpath);
        else if (!gtagsexist(cwd, dbpath, MAXPATHLEN, vflag))
            strlimcpy(dbpath, cwd, sizeof(dbpath));
    } else {
        if (argc > 0)
            realpath(*argv, dbpath);
        else if (Oflag) {
            char *objdir = getobjdir(cwd, vflag);

            if (objdir == NULL)
                die("Objdir not found.");
            strlimcpy(dbpath, objdir, sizeof(dbpath));
        } else
            strlimcpy(dbpath, cwd, sizeof(dbpath));
    }
    if (iflag && (!test("f", makepath(dbpath, dbname(GTAGS), NULL)) ||
                  !test("f", makepath(dbpath, dbname(GRTAGS), NULL)) ||
                  !test("f", makepath(dbpath, dbname(GPATH), NULL)))) {
        if (wflag)
            warning("GTAGS, GRTAGS or GPATH not found. -i option ignored.");
        iflag = 0;
    }
    if (!test("d", dbpath))
        die("directory '%s' not found.", dbpath);
    if (vflag)
        fprintf(stderr, "[%s] Gtags started.\n", now());
    /*
     * initialize parser.
     */
    if (vflag && gtags_parser)
        fprintf(stderr, " Using plug-in parser.\n");
    parser_init(langmap, gtags_parser);
    if (vflag && file_list)
        fprintf(stderr, " Using '%s' as a file list.\n", file_list);
    /*
     * Start statistics.
     */
    init_statistics();
    /*
     * incremental update.
     */
    if (iflag) {
        /*
         * Version check. If existing tag files are old enough
         * gtagsopen() abort with error message.
         */
        GTOP *gtop = gtags_open(dbpath, cwd, GTAGS, GTAGS_MODIFY, 0);
        gtags_close(gtop);
        /*
         * GPATH is needed for incremental updating.
         * Gtags check whether or not GPATH exist, since it may be
         * removed by mistake.
         */
        if (!test("f", makepath(dbpath, dbname(GPATH), NULL)))
            die("Old version tag file found. Please remake it.");
        (void)incremental(dbpath, cwd);
        print_statistics(statistics);
        exit(0);
    }
    /*
     * create GTAGS and GRTAGS
     */
    createtags(dbpath, cwd);
    /*
     * create idutils index.
     */
    if (Iflag) {
        FILE *op;
        GFIND *gp;
        const char *path;

        tim = statistics_time_start("Time of creating ID");
        if (vflag)
            fprintf(stderr, "[%s] Creating indexes for idutils.\n", now());
        strbuf_reset(sb);
        /*
         * Since idutils stores the value of PWD in ID file, we need to
         * force idutils to follow our style.
         */
#if _WIN32 || __DJGPP__
        strbuf_puts(sb, "mkid --files0-from=-");
#else
        strbuf_sprintf(sb, "PWD=%s mkid --files0-from=-", quote_shell(cwd));
#endif
        if (vflag)
            strbuf_puts(sb, " -v");
        strbuf_sprintf(sb, " --file=%s/ID", quote_shell(dbpath));
        if (vflag) {
#ifdef __DJGPP__
            if (is_unixy())	/* test for 4DOS as well? */
#endif
                strbuf_puts(sb, " 1>&2");
        } else {
            strbuf_puts(sb, " >" NULL_DEVICE);
#ifdef __DJGPP__
            if (is_unixy())	/* test for 4DOS as well? */
#endif
                strbuf_puts(sb, " 2>&1");
        }
        if (debug)
            fprintf(stderr, "executing mkid like: %s\n", strbuf_value(sb));
        op = popen(strbuf_value(sb), "w");
        if (op == NULL)
            die("cannot execute '%s'.", strbuf_value(sb));
        gp = gfind_open(dbpath, NULL, GPATH_BOTH);
        while ((path = gfind_read(gp)) != NULL) {
            fputs(path, op);
            fputc('\0', op);
        }
        gfind_close(gp);
        if (pclose(op) != 0)
            die("terminated abnormally '%s' (errno = %d).", strbuf_value(sb), errno);
        if (test("f", makepath(dbpath, "ID", NULL)))
            if (chmod(makepath(dbpath, "ID", NULL), 0644) < 0)
                die("cannot chmod ID file.");
        statistics_time_end(tim);
    }
    if (vflag)
        fprintf(stderr, "[%s] Done.\n", now());
    closeconf();
    strbuf_close(sb);
    print_statistics(statistics);

    return 0;
}