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text.c

/*                                                            -*- C -*-
 * Copyright (c) 1999, 2000, 01
 *    Motoyuki Kasahara
 *
 * 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 2, 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.
 */

/*
 * 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。
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif

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

#define MAXLEN_TEXT 1023

int
main(argc, argv)
    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。*/
    if (eb_set_subbook(&book, subbook_list[subbook_index]) < 0) {
        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);
}

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