>     /*                                                            -*- C -*-
>      * Copyright (c) 1999-2006  Motoyuki Kasahara
>      *
>      * Redistribution and use in source and binary forms, with or without
>      * modification, are permitted provided that the following conditions
>      * are met:
>      * 1. Redistributions of source code must retain the above copyright
>      *    notice, this list of conditions and the following disclaimer.
>      * 2. Redistributions in binary form must reproduce the above copyright
>      *    notice, this list of conditions and the following disclaimer in the
>      *    documentation and/or other materials provided with the distribution.
>      * 3. Neither the name of the project nor the names of its contributors
>      *    may be used to endorse or promote products derived from this software
>      *    without specific prior written permission.
>      *
>      * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
>      * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>      * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
>      * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
>      * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
>      * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
>      * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
>      * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
>      * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
>      * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
>      * SUCH DAMAGE.
>      */

>     /*
>      * 使用方法:
>      *     word <book-path> <subbook-index> <word>
>      * 例:
>      *     word /cdrom 0 apple
>      * 説明:
>      *     <book-path> で指定した CD-ROM 書籍の特定の副本の中から <word>
>      *     という単語を完全一致検索で探し、ヒットしたすべてのエントリの
>      *     見出しを表示します。
>      *
>      *     <subbook-index> には、検索対象の副本のインデックスを指定しま
>      *     す。インデックスは、書籍の最初の副本から順に 0、1、2 ... に
>      *     なります。
>      */
>     #include <stdio.h>
>     #include <stdlib.h>

>     #include <eb/eb.h>
>     #include <eb/error.h>
>     #include <eb/text.h>

>     #define MAX_HITS 50
>     #define MAXLEN_HEADING 127

>     int
>     main(int argc, char *argv[])
>     {
>         EB_Error_Code error_code;
>         EB_Book book;
>         EB_Subbook_Code subbook_list[EB_MAX_SUBBOOKS];
>         EB_Hit hits[MAX_HITS];
>         char heading[MAXLEN_HEADING + 1];
>         int subbook_count;
>         int subbook_index;
>         int hit_count;
>         ssize_t heading_length;
>         int i;

>         /* コマンド行引数をチェック。*/
>         if (argc != 4) {
>             fprintf(stderr, "Usage: %s book-path subbook-index word\n",
>                 argv[0]);
>             exit(1);
>         }

>         /* EB ライブラリと `book' を初期化。*/
>         eb_initialize_library();
>         eb_initialize_book(&book);

>         /* 書籍を `book' に結び付ける。*/
>         error_code = eb_bind(&book, argv[1]);
>         if (error_code != EB_SUCCESS) {
>             fprintf(stderr, "%s: failed to bind the book, %s: %s\n",
>                 argv[0], eb_error_message(error_code), argv[1]);
>             goto die;
>         }

>         /* 副本の一覧を取得。*/
>         error_code = eb_subbook_list(&book, subbook_list, &subbook_count);
>         if (error_code != EB_SUCCESS) {
>             fprintf(stderr, "%s: failed to get the subbbook list, %s\n",
>                 argv[0], eb_error_message(error_code));
>             goto die;
>         }

>         /* 副本のインデックスを取得。*/
>         subbook_index = atoi(argv[2]);

>         /*「現在の副本 (current subbook)」を設定。*/
>         error_code = eb_set_subbook(&book, subbook_list[subbook_index]);
>         if (error_code != EB_SUCCESS) {
>             fprintf(stderr, "%s: failed to set the current subbook, %s\n",
>                 argv[0], eb_error_message(error_code));
>             goto die;
>         }

>         /* 単語検索のリクエストを送出。*/
>         error_code = eb_search_exactword(&book, argv[3]);
>         if (error_code != EB_SUCCESS) {
>             fprintf(stderr, "%s: failed to search for the word, %s: %s\n",
>                 argv[0], eb_error_message(error_code), argv[3]);
>             goto die;
>         }

>         for (;;) {
>             /* 残っているヒットエントリを取得。*/
>             error_code = eb_hit_list(&book, MAX_HITS, hits, &hit_count);
>             if (error_code != EB_SUCCESS) {
>                 fprintf(stderr, "%s: failed to get hit entries, %s\n",
>                     argv[0], eb_error_message(error_code));
>                 goto die;
>             }
>             if (hit_count == 0)
>                 break;

>             for (i = 0; i < hit_count; i++) {
>                 /* 見出しの位置へ移動。*/
>                 error_code = eb_seek_text(&book, &(hits[i].heading));
>                 if (error_code != EB_SUCCESS) {
>                     fprintf(stderr, "%s: failed to seek the subbook, %s\n",
>                         argv[0], eb_error_message(error_code));
>                     goto die;
>                 }

>                 /* 見出しを取得して表示。*/
>                 error_code = eb_read_heading(&book, NULL, NULL, NULL,
>                     MAXLEN_HEADING, heading, &heading_length);
>                 if (error_code != EB_SUCCESS) {
>                     fprintf(stderr, "%s: failed to read the subbook, %s\n",
>                         argv[0], eb_error_message(error_code));
>                     goto die;
>                 }
>                 printf("%s\n", heading);
>             }
>         }

>         /* 書籍と EB ライブラリの利用を終了。*/
>         eb_finalize_book(&book);
>         eb_finalize_library();
>         exit(0);

>         /* エラー発生で終了するときの処理。*/
>       die:
>         eb_finalize_book(&book);
>         eb_finalize_library();
>         exit(1);
>     }