diff -ur ../eb-4.3.3.org/eb/appsub.c ./eb/appsub.c
--- ../eb-4.3.3.org/eb/appsub.c	2007-12-12 16:54:52.000000000 +0900
+++ ./eb/appsub.c	2008-10-15 12:10:29.000000000 +0900
@@ -241,7 +241,7 @@
     }
     stop_code_page = eb_uint4(buffer);
     if (0 < stop_code_page) {
-	if (zio_lseek(&subbook->zio, (stop_code_page - 1) * EB_SIZE_PAGE,
+      if (zio_lseek(&subbook->zio, (off_t) (stop_code_page - 1) * EB_SIZE_PAGE,
 	    SEEK_SET) < 0) {
 	    error_code = EB_ERR_FAIL_SEEK_APP;
 	    goto failed;
diff -ur ../eb-4.3.3.org/eb/binary.c ./eb/binary.c
--- ../eb-4.3.3.org/eb/binary.c	2007-12-12 16:54:52.000000000 +0900
+++ ./eb/binary.c	2008-10-15 12:23:02.000000000 +0900
@@ -197,7 +197,7 @@
 	char buffer[22];
 
 	if (zio_lseek(&book->subbook_current->text_zio,
-	    (position->page - 1) * EB_SIZE_PAGE + position->offset,
+	    (off_t) (position->page - 1) * EB_SIZE_PAGE + position->offset,
 	    SEEK_SET) < 0) {
 	    error_code = EB_ERR_FAIL_SEEK_BINARY;
 	    goto failed;
@@ -450,7 +450,7 @@
 	char buffer[22];
 
 	if (zio_lseek(&book->subbook_current->text_zio,
-	    (position->page - 1) * EB_SIZE_PAGE + position->offset,
+	    (off_t) (position->page - 1) * EB_SIZE_PAGE + position->offset,
 	    SEEK_SET) < 0) {
 	    error_code = EB_ERR_FAIL_SEEK_BINARY;
 	    goto failed;
@@ -677,7 +677,7 @@
 	    context->size = 0;
     } else {
 	if (zio_lseek(context->zio,
-	    (book->subbook_current->sound.start_page - 1) * EB_SIZE_PAGE + 32,
+	    (off_t) (book->subbook_current->sound.start_page - 1) * EB_SIZE_PAGE + 32,
 	    SEEK_SET) < 0) {
 	    error_code = EB_ERR_FAIL_SEEK_BINARY;
 	    goto failed;
diff -ur ../eb-4.3.3.org/eb/multi.c ./eb/multi.c
--- ../eb-4.3.3.org/eb/multi.c	2007-12-12 16:54:52.000000000 +0900
+++ ./eb/multi.c	2008-10-15 12:23:52.000000000 +0900
@@ -57,7 +57,7 @@
 	 * Read the index table page of the multi search.
 	 */
 	if (zio_lseek(&subbook->text_zio,
-	    (multi->search.start_page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
+	    (off_t) (multi->search.start_page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
 	    error_code = EB_ERR_FAIL_SEEK_TEXT;
 	    goto failed;
 	}
@@ -212,7 +212,7 @@
      * Read the page of the multi search.
      */
     if (zio_lseek(&subbook->text_zio,
-	(subbook->search_title_page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
+	(off_t) (subbook->search_title_page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
 	error_code = EB_ERR_FAIL_SEEK_TEXT;
 	goto failed;
     }
diff -ur ../eb-4.3.3.org/eb/narwfont.c ./eb/narwfont.c
--- ../eb-4.3.3.org/eb/narwfont.c	2007-12-12 16:54:52.000000000 +0900
+++ ./eb/narwfont.c	2008-10-15 12:24:40.000000000 +0900
@@ -151,7 +151,7 @@
     /*
      * Read information from the text file.
      */
-    if (zio_lseek(zio, (narrow_font->page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
+    if (zio_lseek(zio, (off_t) (narrow_font->page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
 	error_code = EB_ERR_FAIL_SEEK_FONT;
 	goto failed;
     }
@@ -276,7 +276,7 @@
     /*
      * Read glyphs.
      */
-    if (zio_lseek(zio, narrow_font->page * EB_SIZE_PAGE, SEEK_SET) < 0) {
+    if (zio_lseek(zio, (off_t) narrow_font->page * EB_SIZE_PAGE, SEEK_SET) < 0) {
 	error_code = EB_ERR_FAIL_SEEK_FONT;
 	goto failed;
     }
@@ -761,7 +761,7 @@
     if (narrow_current->glyphs == NULL) {
 	zio = &narrow_current->zio;
 
-	if (zio_lseek(zio, narrow_current->page * EB_SIZE_PAGE + offset,
+	if (zio_lseek(zio, (off_t) narrow_current->page * EB_SIZE_PAGE + offset,
 		SEEK_SET) < 0) {
 	    error_code = EB_ERR_FAIL_SEEK_FONT;
 	    goto failed;
@@ -848,7 +848,7 @@
     if (narrow_current->glyphs == NULL) {
 	zio = &narrow_current->zio;
 
-	if (zio_lseek(zio, narrow_current->page * EB_SIZE_PAGE + offset,
+	if (zio_lseek(zio, (off_t) narrow_current->page * EB_SIZE_PAGE + offset,
 		SEEK_SET) < 0) {
 	    error_code = EB_ERR_FAIL_SEEK_FONT;
 	    goto failed;
diff -ur ../eb-4.3.3.org/eb/readtext.c ./eb/readtext.c
--- ../eb-4.3.3.org/eb/readtext.c	2007-12-12 16:54:52.000000000 +0900
+++ ./eb/readtext.c	2008-10-15 15:01:51.000000000 +0900
@@ -99,7 +99,7 @@
     LOG(("in: eb_initialize_text_context(book=%d)", (int)book->code));
 
     book->text_context.code = EB_TEXT_INVALID;
-    book->text_context.location = -1;
+    book->text_context.location = (off_t) -1;
     book->text_context.out = NULL;
     book->text_context.out_rest_length = 0;
     book->text_context.unprocessed = NULL;
@@ -213,7 +213,7 @@
      */
     eb_reset_text_context(book);
     book->text_context.code = EB_TEXT_SEEKED;
-    book->text_context.location = (position->page - 1) * EB_SIZE_PAGE
+    book->text_context.location = (off_t) (position->page - 1) * EB_SIZE_PAGE
 	+ position->offset;
 
     /*
@@ -510,13 +510,13 @@
      * Seek START file and read data.
      */
     if (zio_lseek(&book->subbook_current->text_zio,
-	book->text_context.location, SEEK_SET) == -1) {
+	book->text_context.location, SEEK_SET) == (off_t) -1) {
 	error_code = EB_ERR_FAIL_SEEK_TEXT;
 	goto failed;
     }
     *text_length = zio_read(&book->subbook_current->text_zio, text,
 	text_max_length);
-    book->text_context.location += *text_length;
+    book->text_context.location += (off_t) *text_length;
     if (*text_length < 0) {
 	error_code = EB_ERR_FAIL_READ_TEXT;
 	goto failed;
@@ -610,7 +610,7 @@
      */
     if (book->code == cache_book_code
 	&& cache_location <= context->location
-	&& context->location < cache_location + cache_length) {
+	&& context->location < (off_t) cache_location + cache_length) {
 	cache_p = cache_buffer + (context->location - cache_location);
 	cache_rest_length = cache_length
 	    - (context->location - cache_location);
@@ -637,7 +637,7 @@
 	    if (0 < cache_rest_length)
 		memmove(cache_buffer, cache_p, cache_rest_length);
 	    if (zio_lseek(&book->subbook_current->text_zio,
-		context->location + cache_rest_length, SEEK_SET) == -1) {
+		(off_t) context->location + cache_rest_length, SEEK_SET) == -1) {
 		error_code = EB_ERR_FAIL_SEEK_TEXT;
 		goto failed;
 	    }
@@ -747,7 +747,7 @@
 		in_step = 2;
 		if (context->code == EB_TEXT_HEADING) {
 		    context->text_status = EB_TEXT_STATUS_SOFT_STOP;
-		    context->location += in_step;
+		    context->location += (off_t) in_step;
 		    goto succeeded;
 		}
 		hook = hookset->hooks + EB_HOOK_NEWLINE;
@@ -1414,7 +1414,7 @@
 	 */
 	cache_p += in_step;
 	cache_rest_length -= in_step;
-	context->location += in_step;
+	context->location += (off_t) in_step;
 	in_step = 0;
 
 	/*
@@ -1877,7 +1877,7 @@
     off_t current_location;
     off_t forward_location;
     off_t read_location;
-    off_t backward_location = -1;
+    off_t backward_location = (off_t) -1;
     char text_buffer[EB_SIZE_PAGE];
     char *text_buffer_p;
     ssize_t read_result;
@@ -1963,7 +1963,7 @@
      */
     current_location = book->text_context.location;
 
-    while (0 < book->text_context.location) {
+    while ((off_t) 0 < book->text_context.location) {
 	size_t backward_distance;
 	int i;
 
@@ -1984,8 +1984,8 @@
 	if (book->text_context.location < EB_SIZE_PAGE + 3)
 	    read_location = 0;
 	else
-	    read_location = book->text_context.location - EB_SIZE_PAGE + 3;
-	backward_distance = book->text_context.location - read_location;
+	    read_location = (off_t) book->text_context.location - EB_SIZE_PAGE + 3;
+	backward_distance = (off_t) book->text_context.location - read_location;
 
 	if (zio_lseek(&book->subbook_current->text_zio, read_location,
 	    SEEK_SET) == -1) {
@@ -2009,8 +2009,8 @@
 
 	while (0 <= i) {
 	    if (eb_uint2(text_buffer_p) == 0x1f02) {
-		book->text_context.location = read_location + i;
-		if (current_location <= book->text_context.location + 2) {
+		book->text_context.location = (off_t) read_location + i;
+		if (current_location <= (off_t) book->text_context.location + 2) {
 		    error_code = EB_ERR_END_OF_CONTENT;
 		    goto failed;
 		}
@@ -2026,32 +2026,32 @@
 	    }
 
 	    eb_reset_text_context(book);
-	    book->text_context.location = read_location + i;
+	    book->text_context.location = (off_t) read_location + i;
 	    error_code = eb_read_text_internal(book, appendix,
 		&eb_default_hookset, NULL, EB_SIZE_PAGE, NULL, NULL, 1);
 	    if (error_code != EB_SUCCESS
 		&& error_code != EB_ERR_END_OF_CONTENT)
 		goto failed;
 
-	    if (book->text_context.location >= current_location - 4
-		&& book->text_context.location <= current_location + 4
-		&& backward_location < 0)
-		forward_location = current_location;
-	    if (book->text_context.location >= forward_location - 4
-		&& book->text_context.location <= forward_location + 4)
-		backward_location = read_location + i;
-	    else if (book->text_context.location < forward_location)
+	    if (book->text_context.location >= (off_t) current_location - 4
+		&& book->text_context.location <= (off_t) current_location + 4
+		&& backward_location < (off_t) 0)
+		forward_location = (off_t) current_location;
+	    if (book->text_context.location >= (off_t) forward_location - 4
+		&& book->text_context.location <= (off_t) forward_location + 4)
+		backward_location = (off_t) read_location + i;
+	    else if (book->text_context.location < (off_t) forward_location)
 		goto loop_end;
 
 	    text_buffer_p--;
 	    i--;
 	}
 
-	book->text_context.location = read_location - 1;
+	book->text_context.location = (off_t) read_location - 1;
     }
 
   loop_end:
-    if (backward_location < 0) {
+    if (backward_location < (off_t) 0) {
 	error_code = EB_ERR_UNEXP_TEXT;
 	goto failed;
     }
diff -ur ../eb-4.3.3.org/eb/search.c ./eb/search.c
--- ../eb-4.3.3.org/eb/search.c	2007-12-12 16:54:52.000000000 +0900
+++ ./eb/search.c	2008-10-15 12:27:13.000000000 +0900
@@ -299,7 +299,7 @@
 	 * Seek and read a page.
 	 */
 	if (zio_lseek(&book->subbook_current->text_zio,
-	    (context->page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
+		      (off_t) (context->page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
 	    cache_book_code = EB_BOOK_NONE;
 	    error_code = EB_ERR_FAIL_SEEK_TEXT;
 	    goto failed;
@@ -603,7 +603,7 @@
 	 */
 	if (cache_book_code != book->code || cache_page != context->page) {
 	    if (zio_lseek(&book->subbook_current->text_zio,
-		(context->page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
+		(off_t) (context->page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
 		error_code = EB_ERR_FAIL_SEEK_TEXT;
 		goto failed;
 	    }
@@ -929,7 +929,7 @@
 	 */
 	if (cache_book_code != book->code || cache_page != context->page) {
 	    if (zio_lseek(&book->subbook_current->text_zio,
-		(context->page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
+		(off_t) (context->page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
 		error_code = EB_ERR_FAIL_SEEK_TEXT;
 		goto failed;
 	    }
@@ -1261,7 +1261,7 @@
 	 */
 	if (cache_book_code != book->code || cache_page != context->page) {
 	    if (zio_lseek(&book->subbook_current->text_zio,
-		(context->page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
+		(off_t) (context->page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
 		error_code = EB_ERR_FAIL_SEEK_TEXT;
 		goto failed;
 	    }
diff -ur ../eb-4.3.3.org/eb/subbook.c ./eb/subbook.c
--- ../eb-4.3.3.org/eb/subbook.c	2007-12-12 16:54:52.000000000 +0900
+++ ./eb/subbook.c	2008-10-15 12:27:47.000000000 +0900
@@ -190,7 +190,7 @@
 	 * Rewind the file descriptor of the start file.
 	 */
 	if (zio_lseek(&subbook->text_zio,
-	    (subbook->index_page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
+	    (off_t) (subbook->index_page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
 	    error_code = EB_ERR_FAIL_SEEK_TEXT;
 	    goto failed;
 	}
@@ -288,7 +288,7 @@
     /*
      * Read the index table in the subbook.
      */
-    if (zio_lseek(&subbook->text_zio, (subbook->index_page - 1) * EB_SIZE_PAGE,
+    if (zio_lseek(&subbook->text_zio, (off_t) (subbook->index_page - 1) * EB_SIZE_PAGE,
 	SEEK_SET) < 0) {
 	error_code = EB_ERR_FAIL_SEEK_TEXT;
 	goto failed;
diff -ur ../eb-4.3.3.org/eb/widefont.c ./eb/widefont.c
--- ../eb-4.3.3.org/eb/widefont.c	2008-01-14 22:53:58.000000000 +0900
+++ ./eb/widefont.c	2008-10-15 12:28:26.000000000 +0900
@@ -152,7 +152,7 @@
     /*
      * Read information from the text file.
      */
-    if (zio_lseek(zio, (wide_font->page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
+    if (zio_lseek(zio, (off_t) (wide_font->page - 1) * EB_SIZE_PAGE, SEEK_SET) < 0) {
 	error_code = EB_ERR_FAIL_SEEK_FONT;
 	goto failed;
     }
@@ -277,7 +277,7 @@
     /*
      * Read glyphs.
      */
-    if (zio_lseek(zio, wide_font->page * EB_SIZE_PAGE, SEEK_SET) < 0) {
+    if (zio_lseek(zio, (off_t) wide_font->page * EB_SIZE_PAGE, SEEK_SET) < 0) {
 	error_code = EB_ERR_FAIL_SEEK_FONT;
 	goto failed;
     }
@@ -762,7 +762,7 @@
     if (wide_current->glyphs == NULL) {
 	zio = &wide_current->zio;
 
-	if (zio_lseek(zio, wide_current->page * EB_SIZE_PAGE + offset,
+	if (zio_lseek(zio, (off_t) wide_current->page * EB_SIZE_PAGE + offset,
 		SEEK_SET) < 0) {
 	    error_code = EB_ERR_FAIL_SEEK_FONT;
 	    goto failed;
@@ -849,7 +849,7 @@
     if (wide_current->glyphs == NULL) {
 	zio = &wide_current->zio;
 
-	if (zio_lseek(zio, wide_current->page * EB_SIZE_PAGE + offset,
+	if (zio_lseek(zio, (off_t) wide_current->page * EB_SIZE_PAGE + offset,
 		SEEK_SET) < 0) {
 	    error_code = EB_ERR_FAIL_SEEK_FONT;
 	    goto failed;