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version 1.6, 2000/01/16 03:15:49 version 1.12, 2000/01/17 07:15:52
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 % $OpenXM: OpenXM/doc/issac2000/openxm-clients.tex,v 1.5 2000/01/15 06:26:06 takayama Exp $  % $OpenXM: OpenXM/doc/issac2000/openxm-clients.tex,v 1.11 2000/01/17 06:10:40 noro Exp $
   
 \section{OpenXM Clients}  \section{OpenXM Clients}
   
 \subsection{Risa/Asir}  \subsection{Risa/Asir}
   
 Risa/Asir provides a launcher to invoke an OpenXM server and to set up the  Risa/Asir provides a launcher {\tt ox\_launch}
 communication between the server and itself. As a client,  to invoke an OpenXM server and to set up the
 it provides many built-in functions for communication.  communication between the server and itself.
   
 \subsubsection{Setting up servers}  
 {\tt ox\_launch} is a general purpose launcher.  This application  
 invokes a server and sets up the server-client communication  
 according to the protocol stated in Section \ref{launcher}, then  
 itself becomes a control server.  
 Several facilities related to {{\tt ox\_launch}} are provided  
 as built-in functions of Risa/Asir: a function to invoke a server  
 automatically from a give host name and a server name, and a set  
 of functions to execute the port generation, {\tt bind}, {\tt listen},  
 {\tt connect} and {\tt accept} operations on sockets individually.  
   
 \subsubsection{Manipulating servers}  
 Fundamental operations on OpenXM servers are  Fundamental operations on OpenXM servers are
 exchange of {\tt OX} data and sending of {\tt SM} commands.  exchange of OX data and sending of stack machine commands.
 The following functions  As a client, Asir provides the following functions
 are provided to execute these primitive operations:  to execute these primitive operations:
 {\tt ox\_push\_cmo()} for pushing data to a server,  {\tt ox\_push\_cmo()} for pushing data,
 {\tt ox\_push\_cmd()} for sending an {\tt SM} command to a server  {\tt ox\_push\_cmd()} for sending a stack machine command
 and {\tt ox\_get()} for receiving data from a stream.  and {\tt ox\_get()} for receiving data from a stream.
   
 Some operations including the reset operation are realized by  Some operations including the reset operation are implemented by
 combining these primitives.  Among them, frequently used ones are  combining these primitives.  Among them, frequently used ones are
 provided as built-in functions. We show several ones.  provided as built-in functions. We show some of them.
   
 \begin{itemize}  \begin{itemize}
 \item {\tt ox\_pop\_cmo()}  \item {\tt ox\_pop\_cmo()}
Line 49  the function. It does not wait the termination of the 
Line 36  the function. It does not wait the termination of the 
 After sending {\tt SM\_control\_reset\_connection} to a control server,  After sending {\tt SM\_control\_reset\_connection} to a control server,
 it completes the operations stated in Section \ref{control}.  it completes the operations stated in Section \ref{control}.
 \end{itemize}  \end{itemize}
 Furthermore {\tt ox\_select()} is provided to detect streams ready for  Furthermore {\tt ox\_select()} is provided to detect if streams are ready for
 reading. It is realized by the {\tt select()} system call and is used  reading. It is implemented by the {\tt select()} system call and is used
 to avoid blocking on read operations.  to avoid blocking on read operations.
   
 \subsection{Mathematica}  \subsection{Mathematica}
   
 We provide an OpenXM client {\tt math2ox} written as an external module  We provide an OpenXM client {\tt math2ox} written as an external module
 for Mathematica.  Our client communicates with Mathematica by MathLink and  for Mathematica.
 with an OpenXM server by OpenXM protocols.  The module {\tt math2ox} communicates with Mathematica by MathLink and
   with any OpenXM server by the OpenXM protocol.
 By using the module {\tt math2ox},  By using the module {\tt math2ox},
 we can call OpenXM servers from Mathematica;  we can call OpenXM servers from Mathematica;
 here is an example of a computation of the de Rham cohomology groups  here is a demonstration of a computation of the de Rham cohomology groups
 of ${\bf C}^2 \setminus V(x^3-y^2)$.  of ${\bf C}^2 \setminus V(x^3-y^2)$ from Mathematica.
 {\footnotesize  {\footnotesize
 \begin{verbatim}  \begin{verbatim}
 In[1]:= Install["math2ox"]  In[1]:= Install["math2ox"]
 In[2]:= OxStart["../lib/sm1/bin/ox_sm1_forAsir"]  In[2]:= OxStart["../lib/sm1/bin/ox_sm1_forAsir"]
 In[3]:= OxExecute[" [(x^3-y^2) (x,y)] deRham "]  In[3]:= OxExecute[" [(x^3-y^2) (x,y)] deRham "]
 In[4]:= OxPopString[]  In[4]:= OxPopString[]
 Out[4]=  [ 1 , 1 , 0 ]  Out[4]=  [ 1 , 1 , 0 ]  (* The dimension of
                              cohomology groups *)
 \end{verbatim}  \end{verbatim}
 }  }
   
 \subsubsection{Functions}  The {\tt math2ox} adds the following functions to Mathematica.
   
 The {\tt math2ox} has the following functions.  
 \begin{quote}  \begin{quote}
 {\tt OxStart[s\_String]} \\  {\tt OxStart[s\_String]} \\
 {\tt OxStartInsecure[s\_String]} \\  {\tt OxStartInsecure[s\_String]} \\
Line 86  The {\tt math2ox} has the following functions.
Line 73  The {\tt math2ox} has the following functions.
 {\tt OxClose[]} \\  {\tt OxClose[]} \\
 {\tt OxReset[]}  {\tt OxReset[]}
 \end{quote}  \end{quote}
 For example, {\tt OxPopCMO[]} executes the same operation  Although the list of functions speaks itself,
 as {\tt ox\_pop\_cmo()} in Risa/Asir.  we add some explanations.
 By using the {\tt OxParse[]} function, one can send suitable OX messages,  The function {\tt OxPopCMO[]} executes the same operation
 written by the OX expression, to a server. OX expressions are  as {\tt ox\_pop\_cmo()} in Risa/Asir;
 Lisp-like expressions for OX messages and are defined  it pops data from the server stack.
 in~\cite{noro-takayama}.  
 The {\tt OxGet[]} receives an OX data message  The {\tt OxGet[]} receives an OX data message
 and returns its translation to an local object.  and returns its translation to an local object.
   The function {\tt OxParse[]} helps debugging to connect Mathematica
   and ox servers.
   By using the function, one can send OX messages,
   written by the OX expression, to a server.
   OX expressions are Lisp-like expressions for OX messages and are defined
   in~\cite{noro-takayama}.
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