===================================================================
RCS file: /home/cvs/OpenXM/src/asir-doc/parts/builtin/io.texi,v
retrieving revision 1.7
retrieving revision 1.13
diff -u -p -r1.7 -r1.13
--- OpenXM/src/asir-doc/parts/builtin/io.texi	2001/04/23 05:45:37	1.7
+++ OpenXM/src/asir-doc/parts/builtin/io.texi	2003/11/27 15:56:08	1.13
@@ -1,4 +1,4 @@
-@comment $OpenXM: OpenXM/src/asir-doc/parts/builtin/io.texi,v 1.6 2001/03/12 05:01:18 noro Exp $
+@comment $OpenXM: OpenXM/src/asir-doc/parts/builtin/io.texi,v 1.12 2003/11/01 23:58:44 takayama Exp $
 \BJP
 @node 入出力,,, 組み込み函数
 @section 入出力
@@ -16,6 +16,7 @@
 * bsave bload::
 * bload27::
 * print::
+* access::
 * open_file close_file get_line get_byte put_byte purge_stdin::
 @end menu
 
@@ -96,7 +97,7 @@ line of the input file is strongly recommended.
 @itemize @bullet
 \BJP
 @item
-実際のプログラムの書き方は, @xref{ユーザ言語 Asir}.
+実際のプログラムの書き方は, @pxref{ユーザ言語 Asir}.
  テキストファイルを読み込む場合, @code{cpp} 
 を通すので, C のプログラム同様 @code{#include}, @code{#define} を使うことができる. 
 @item
@@ -121,7 +122,7 @@ Windows 版もディレクトリのセパレータとして @samp
 \E
 \BEG
 @item
-@xref{User language Asir} for practical programming.
+See @ref{User language Asir} for practical programming.
 Since text files are read through @code{cpp},
 the user can use, as in C programs, @code{#include} and @code{#define}
 in @b{Asir} program source codes.
@@ -140,7 +141,7 @@ On Windows, @code{get_rootdir()/lib} is searched if 
 We recommend to write an @code{end} command at the last line of
 your program.  If not, @b{Asir} will not give you a prompt after it
 will have executed @code{load} command.
-(Escape with an interrupt character (@pxref{Interruption}),
+(Escape with an interrupt character (@ref{Interruption}),
 if you have lost yourself.)
 Even in such a situation,
 @b{Asir} itself is still ready to read keyboard inputs as usual.
@@ -521,17 +522,44 @@ The last 0 will not be printed. )
 @item 
 Formatted outputs are not currently supported.
 If one wishes to output multiple objects by a single @code{print()} command,
-use list like @code{[@var{obj1,...}]}, which is not so beautiful, but
+use list like @code{[@var{obj1},...]}, which is not so beautiful, but
 convenient to minimize programming efforts.
 \E
 @end itemize
 
 @example
-[8] def cat(L) @{ while ( L != [] ) @{ print(car(L),0); L = cdr(L);@} print(""); @}
+[8] def cat(L) @{ while ( L != [] ) @{ print(car(L),0); L = cdr(L);@}
+print(""); @}
 [9] cat([xyz,123,"gahaha"])$
 xyz123gahaha
 @end example
 
+\JP @node access,,, 入出力
+\EG @node aceess,,, Inputs and Outputs
+@subsection @code{access}
+@findex access
+
+@table @t
+@item access(@var{file})
+\JP :: @var{file} の存在をテストする. 
+\EG :: testing an existence of @var{file}.
+@end table
+
+@table @var
+@item return
+0 or 1
+@item file
+\JP ファイル名
+\EG filename
+@end table
+
+@itemize @bullet
+\BJP
+@item
+@var{file} が存在すれば 1, 存在しなければ 0 を返す. 
+\E
+@end itemize
+
 \JP @node open_file close_file get_line get_byte put_byte purge_stdin,,, 入出力
 \EG @node open_file close_file get_line get_byte put_byte purge_stdin,,, Inputs and Outputs
 @subsection @code{open_file}, @code{close_file}, @code{get_line}, @code{get_byte}, @code{put_byte}, @code{purge_stdin}
@@ -555,9 +583,9 @@ xyz123gahaha
 @item get_byte(@var{num})
 \JP :: 識別子 @var{num} のファイルから 1 バイト読む. 
 \EG :: Reads a byte from the file indicated by a descriptor @var{num}.
-@item put_byte(@var{num})
-\JP :: 識別子 @var{num} のファイルに 1 バイト書く.
-\EG :: Writes a byte to the file indicated by a descriptor @var{num}.
+@item put_byte(@var{num},@var{c})
+\JP :: 識別子 @var{num} のファイルに 1 バイト @var{c} を書く.
+\EG :: Writes a byte @var{c} to the file indicated by a descriptor @var{num}.
 @item purge_stdin()
 @item purge_stdin()
 \JP :: 標準入力のバッファをクリアする.
@@ -587,6 +615,9 @@ xyz123gahaha
 用の場合 @code{"w"}, 末尾追加の場合 @code{"a"} など.
 成功した場合, ファイル識別子として非負整数を返す. 失敗の場合エラーとなる. 
 不要になったファイルは @code{close_file()} でクローズする. 
+特別なファイル名 unix://stdin, unix://stdout, unix://stderr を与えると
+それぞれ標準入力, 標準出力, 標準エラー出力をオープンする.
+この場合モード指定は無視される.
 @item @code{get_line()} は現在オープンしているファイルから 1 行読み, 
 文字列として返す. 引数がない場合, 標準入力から 1 行読む.
 @item @code{get_byte()} は現在オープンしているファイルから 1 バイト読み
@@ -614,6 +645,10 @@ The stream pointer is set at the end of the file.
 If successful, it returns a non-negative integer as the file descriptor.
 Otherwise the system error function is called.
 Unnecessary files should be closed by @code{close_file()}.
+If the special file name unix://stdin or unix://stdout or unix://stderr
+is given, it returns the file descriptor for the standard input or
+the standard output or the standard error stream respectively.
+The mode argument is ignored in this case.
 @item @code{get_line()} reads a line from an opened file and returns the
 line as a string. If no argument is supplied, it reads a line from the
 standard input.