>     /*                                                            -*- 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:
>      *     text <book-path> <subbook-index> <number>
>      * 例:
>      *     text /cdrom 0 10
>      * 説明:
>      *     <book-path> で指定した CD-ROM 書籍から特定の副本を選び、本文
>      *     の先頭から <number> 個分の単語の説明を出力します。
>      *
>      *     <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 MAXLEN_TEXT 1023

>     int
>     main(int argc, char *argv[])
>     {
>         EB_Error_Code error_code;
>         EB_Book book;
>         EB_Subbook_Code subbook_list[EB_MAX_SUBBOOKS];
>         int subbook_count;
>         int subbook_index;
>         EB_Position text_position;
>         char text[MAXLEN_TEXT + 1];
>         ssize_t text_length;
>         int text_count;
>         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 number\n",
>                 argv[0]);
>             exit(1);
>         }
>         text_count = atoi(argv[3]);

>         /* 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;
>         }

>         /* テキストの開始位置を取得。*/
>         error_code = eb_text(&book, &text_position);
>         if (error_code != EB_SUCCESS) {
>             fprintf(stderr, "%s: failed to get text information, %s\n",
>                 argv[0], eb_error_message(error_code));
>             goto die;
>         }

>         /* テキストをシーク。*/
>         error_code = eb_seek_text(&book, &text_position);
>         if (error_code != EB_SUCCESS) {
>             fprintf(stderr, "%s: failed to seek text, %s\n",
>                 argv[0], eb_error_message(error_code));
>             goto die;
>         }

>         i = 0;
>         while (i < text_count) {
>             /* テキストを取得。*/
>             error_code = eb_read_text(&book, NULL, NULL, NULL, MAXLEN_TEXT,
>                 text, &text_length);
>             if (error_code != EB_SUCCESS) {
>                 fprintf(stderr, "%s: failed to read text, %s\n",
>                     argv[0], eb_error_message(error_code));
>                 goto die;
>             }
>             fputs(text, stdout);

>             if (!eb_is_text_stopped(&book))
>                 continue;

>             fputs("\n----------------------------------------\n", stdout);

>             /* 次の単語の説明へ移動。*/
>             error_code = eb_forward_text(&book, NULL);
>             if (error_code == EB_ERR_END_OF_CONTENT)
>                 fputs("\n[END]\n", stdout);
>             else if (error_code != EB_SUCCESS) {
>                 fprintf(stderr, "%s: failed to read text, %s\n",
>                     argv[0], eb_error_message(error_code));
>                 goto die;
>             }
>             i++;
>         }

>         /* 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);
>     }