root/htags/dupindex.c

/* [<][>][^][v][top][bottom][index][help] */

DEFINITIONS

This source file includes following definitions.
  1. makedupindex

/*
 * Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
 *      Tama Communications Corporation
 *
 * This file is part of GNU GLOBAL.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#ifdef HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#include "cache.h"
#include "common.h"
#include "global.h"
#include "htags.h"

/*
 * Data for each tag file.
 *
 *                                    GTAGS         GRTAGS       GSYMS
 */
static const char *dirs[]    = {NULL, DEFS,         REFS,        SYMS};
static const char *kinds[]   = {NULL, "definition", "reference", "symbol"};
static const char *options[] = {NULL, "",           "r",         "s"};

/*
 * Make duplicate object index.
 *
 * If referred tag is only one, direct link which points the tag is generated.
 * Else if two or more tag exists, indirect link which points the tag list
 * is generated.
 */
int
makedupindex(void)
{
        STRBUF *sb = strbuf_open(0);
        STRBUF *command = strbuf_open(0);
        int definition_count = 0;
        char srcdir[MAXPATHLEN];
        int db;
        char buf[1024];
        FILEOP *fileop = NULL;
        FILE *op = NULL;
        FILE *ip = NULL;

        snprintf(srcdir, sizeof(srcdir), "../%s", SRCS);
        for (db = GTAGS; db < GTAGLIM; db++) {
                const char *kind = kinds[db];
                const char *option = options[db];
                int writing = 0;
                int count = 0;
                int entry_count = 0;
                char *ctags_x, tag[IDENTLEN], prev[IDENTLEN], first_line[MAXBUFLEN];

                if (gtags_exist[db] == 0)
                        continue;
                prev[0] = 0;
                first_line[0] = 0;
                /*
                 * construct command line.
                 */
                strbuf_reset(command);
                strbuf_sprintf(command, "%s -x%s --nofilter=path", global_path, option);
                /*
                 * Optimization when the --dynamic option is specified.
                 */
                if (dynamic) {
                        strbuf_puts(command, " --nosource");
                        if (db != GSYMS)
                                strbuf_puts(command, " --nofilter=sort");
                }
                strbuf_puts(command, " \".*\"");
                if ((ip = popen(strbuf_value(command), "r")) == NULL)
                        die("cannot execute command '%s'.", strbuf_value(command));
                while ((ctags_x = strbuf_fgets(sb, ip, STRBUF_NOCRLF)) != NULL) {
                        SPLIT ptable;

                        if (split(ctags_x, 2, &ptable) < 2) {
                                recover(&ptable);
                                die("too small number of parts.(1)\n'%s'", ctags_x);
                        }
                        strlimcpy(tag, ptable.part[PART_TAG].start, sizeof(tag));
                        recover(&ptable);

                        if (strcmp(prev, tag)) {
                                count++;
                                if (vflag)
                                        fprintf(stderr, " [%d] adding %s %s\n", count, kind, tag);
                                if (writing) {
                                        if (!dynamic) {
                                                fputs_nl(gen_list_end(), op);
                                                fputs_nl(body_end, op);
                                                fputs_nl(gen_page_end(), op);
                                                close_file(fileop);
                                                html_count++;
                                        }
                                        writing = 0;
                                        /*
                                         * cache record: " <file id> <entry number>"
                                         */
                                        snprintf(buf, sizeof(buf), " %d %d", count - 1, entry_count);
                                        cache_put(db, prev, buf);
                                }                               
                                /* single entry */
                                if (first_line[0]) {
                                        if (split(first_line, 4, &ptable) < 4) {
                                                recover(&ptable);
                                                die("too small number of parts.(2)\n'%s'", ctags_x);
                                        }
                                        snprintf(buf, sizeof(buf), "%s %s", ptable.part[PART_LNO].start, ptable.part[PART_PATH].start);
                                        cache_put(db, prev, buf);
                                        recover(&ptable);
                                }
                                /*
                                 * Chop the tail of the line. It is not important.
                                 * strlimcpy(first_line, ctags_x, sizeof(first_line));
                                 */
                                strncpy(first_line, ctags_x, sizeof(first_line));
                                first_line[sizeof(first_line) - 1] = '\0';
                                strlimcpy(prev, tag, sizeof(prev));
                                entry_count = 0;
                        } else {
                                /* duplicate entry */
                                if (first_line[0]) {
                                        if (!dynamic) {
                                                char path[MAXPATHLEN+1];

                                                snprintf(path, sizeof(path), "%s/%s/%d.%s", distpath, dirs[db], count, HTML);
                                                fileop = open_output_file(path, cflag);
                                                op = get_descripter(fileop);
                                                fputs_nl(gen_page_begin(tag, SUBDIR), op);
                                                fputs_nl(body_begin, op);
                                                fputs_nl(gen_list_begin(), op);
                                                fputs_nl(gen_list_body(srcdir, first_line), op);
                                        }
                                        writing = 1;
                                        entry_count++;
                                        first_line[0] = 0;
                                }
                                if (!dynamic) {
                                        fputs_nl(gen_list_body(srcdir, ctags_x), op);
                                }
                                entry_count++;
                        }
                }
                if (db == GTAGS)
                        definition_count = count;
                if (pclose(ip) != 0)
                        die("'%s' failed.", strbuf_value(command));
                if (writing) {
                        if (!dynamic) {
                                fputs_nl(gen_list_end(), op);
                                fputs_nl(body_end, op);
                                fputs_nl(gen_page_end(), op);
                                close_file(fileop);
                                html_count++;
                        }
                        /*
                         * cache record: " <file id> <entry number>"
                         */
                        snprintf(buf, sizeof(buf), " %d %d", count, entry_count);
                        cache_put(db, prev, buf);
                }
                if (first_line[0]) {
                        SPLIT ptable;

                        if (split(first_line, 4, &ptable) < 4) {
                                recover(&ptable);
                                die("too small number of parts.(3)\n'%s'", ctags_x);
                        }
                        snprintf(buf, sizeof(buf), "%s %s", ptable.part[PART_LNO].start, ptable.part[PART_PATH].start);
                        cache_put(db, prev, buf);
                        recover(&ptable);
                }
        }
        strbuf_close(sb);
        strbuf_close(command);
        return definition_count;
}

/* [<][>][^][v][top][bottom][index][help] */