307 lines
6.8 KiB
C
307 lines
6.8 KiB
C
/*
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* Copyright (c) 1996, 1997 Shigio Yamaguchi. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Shigio Yamaguchi.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* gtags.c 12-Dec-97
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*
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*/
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#include <sys/stat.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "global.h"
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char *progname = "gtags"; /* command name */
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static void usage __P((void));
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void main __P((int, char **));
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int incremental __P((char *));
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void tagadd __P((int, char *));
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void createtags __P((char *, int));
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char *current __P((void));
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static int iflag;
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static int oflag;
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static int vflag;
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static void
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usage()
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{
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fprintf(stderr, "usage:\t%s [-i][-o][-v][dbpath]\n", progname);
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exit(1);
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}
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void
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main(argc, argv)
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int argc;
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char *argv[];
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{
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char dbpath[MAXPATHLEN+1];
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char env[MAXENVLEN+1];
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char *p;
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int db;
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while (--argc > 0 && (++argv)[0][0] == '-') {
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for (p = argv[0] + 1; *p; p++) {
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switch (*p) {
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case 'i':
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iflag++;
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break;
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case 'o':
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oflag++;
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break;
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case 'v':
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vflag++;
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break;
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/* for compatibility */
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case 's':
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case 'e':
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break;
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default:
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usage();
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}
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}
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}
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if (argc > 0) {
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strcpy(dbpath, *argv);
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} else {
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if (!getcwd(dbpath, MAXPATHLEN))
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die("cannot get current directory.");
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}
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if (!strcmp(dbpath, "/"))
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die("It's root directory! What are you doing?");
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if (!test("d", dbpath))
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die1("directory '%s' not found.", dbpath);
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if (vflag)
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fprintf(stderr, "[%s] Gtags started\n", current());
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/*
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* teach gctags(1) where is dbpath.
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*/
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sprintf(env, "GTAGSDBPATH=%s", dbpath);
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putenv(env);
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/*
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* incremental update.
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*/
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if (iflag && test("f", makepath(dbpath, dbname(GTAGS))) &&
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test("f", makepath(dbpath, dbname(GRTAGS))))
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{
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(void)incremental(dbpath);
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exit(0);
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}
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if (iflag && vflag)
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fprintf(stderr, " GTAGS and GRTAGS not found. -i option ignored.\n");
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/*
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* create GTAGS, GRTAGS and GSYMS
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*/
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for (db = GTAGS; db < GTAGLIM; db++) {
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if (oflag && db == GSYMS)
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continue;
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if (vflag)
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fprintf(stderr, "[%s] Creating '%s'.\n", current(), dbname(db));
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createtags(dbpath, db);
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}
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if (vflag)
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fprintf(stderr, "[%s] Done.\n", current());
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exit(0);
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}
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/*
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* incremental: incremental update
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*
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* i) dbpath dbpath directory
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* r) 0: not updated, 1: updated
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*/
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int
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incremental(dbpath)
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char *dbpath;
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{
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struct stat sb;
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time_t gtags_mtime;
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int updated = 0;
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char *path;
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int db;
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if (vflag) {
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fprintf(stderr, " Tag found in '%s'.\n", dbpath);
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fprintf(stderr, " Incremental update.\n");
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}
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/*
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* get modified time of GTAGS.
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*/
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path = makepath(dbpath, dbname(GTAGS));
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if (stat(path, &sb) < 0)
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die1("stat failed '%s'.", path);
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gtags_mtime = sb.st_mtime;
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for (findopen(); (path = findread(NULL)) != NULL; ) {
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if (stat(path, &sb) < 0)
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die1("stat failed '%s'.", path);
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/*
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* only the path modified after GTAGS was modified.
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*/
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if (gtags_mtime < sb.st_mtime) {
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updated = 1;
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if (vflag)
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fprintf(stderr, " Updating tags of '%s' ...", path + 2);
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for (db = GTAGS; db < GTAGLIM; db++) {
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if (db == GSYMS && !test("f", makepath(dbpath, dbname(db))))
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continue;
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if (vflag)
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fprintf(stderr, "%s", dbname(db));
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tagopen(dbpath, db, 2);
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/*
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* GTAGS needed to make GRTAGS.
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*/
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if (db == GRTAGS)
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lookupopen(dbpath);
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tagdelete(path);
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if (vflag)
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fprintf(stderr, "..");
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tagadd(db, path);
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if (db == GRTAGS)
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lookupclose();
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tagclose();
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}
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if (vflag)
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fprintf(stderr, " Done.\n");
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}
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}
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findclose();
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if (vflag) {
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if (updated)
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fprintf(stderr, " Global databases have been modified.\n");
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else
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fprintf(stderr, " Global databases are up to date.\n");
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fprintf(stderr, "[%s] Done.\n", current());
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fprintf(stderr, " Done.\n");
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}
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return updated;
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}
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/*
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* tagadd: add records which has specified path.
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*
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* i) db 0: GTAGS, 1: GRTAGS, 2: GSYMS
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* i) path source file
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*/
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void
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tagadd(db, path)
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int db;
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char *path;
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{
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char *tagline, *p, *q;
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char key[IDENTLEN+1];
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FILE *ip;
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stropen();
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/*
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* make command line.
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*/
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strputs("gctags -Dex");
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if (db == GRTAGS)
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strputs("r");
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if (db == GSYMS)
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strputs("sc");
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strputc(' ');
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strputs(path);
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p = strclose();
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if (!(ip = popen(p, "r")))
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die1("cannot execute '%s'.", p);
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while ((tagline = mgets(ip, 0, NULL)) != NULL) {
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p = tagline;
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q = key;
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while (*p && !isspace(*p))
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*q++ = *p++;
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*q = 0;
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tagput(key, tagline);
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}
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pclose(ip);
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}
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/*
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* createtags: create tags file
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*
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* i) dbpath dbpath directory
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* i) db GTAGS, GRTAGS, GSYMS
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*/
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void
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createtags(dbpath, db)
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char *dbpath;
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int db;
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{
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char *path;
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/*
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* GTAGS needed to make GRTAGS.
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*/
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if (db == GRTAGS)
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lookupopen(dbpath);
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tagopen(dbpath, db, 1);
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for (findopen(); (path = findread(NULL)) != NULL; ) {
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/*
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* GSYMS doesn't treat asembler.
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*/
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if (db == GSYMS) {
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char *p = path + strlen(path) - 1;
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if ((*p == 's' || *p == 'S') && *(p - 1) == '.')
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continue;
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}
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if (vflag)
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fprintf(stderr, " extracting tags of %s.\n", path);
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tagadd(db, path);
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}
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findclose();
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tagclose();
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if (db == GRTAGS)
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lookupclose();
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}
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/*
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* current: current date and time
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*
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* r) date and time
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*/
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char *
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current(void)
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{
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static char buf[80];
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time_t tval;
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if (time(&tval) == -1)
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die("cannot get current time.");
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(void)strftime(buf, sizeof(buf), "%+", localtime(&tval));
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return buf;
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}
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