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version 1.5, 2000/01/15 06:26:06 version 1.10, 2000/01/17 01:24:27
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 % $OpenXM: OpenXM/doc/issac2000/openxm-clients.tex,v 1.4 2000/01/13 09:21:34 ohara Exp $  % $OpenXM: OpenXM/doc/issac2000/openxm-clients.tex,v 1.9 2000/01/17 00:48:06 takayama 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 to invoke an OpenXM server and to set up the
 communication between the server and itself. It also provides primitives  communication between the server and itself. As a client,
 for communication as built-in functions.  it provides many built-in functions for communication.
   
 \subsubsection{{\tt ox\_launch}}  \subsubsection{Setting up servers}
 {\tt ox\_launch} is a general purpose launcher.  This application  {\tt ox\_launch} is a general purpose launcher.  This application
 invokes a server and initiates the server-client communication  invokes a server and sets up the server-client communication
 according to the protocol stated in Section \ref{launcher}, then  according to the protocol stated in Section \ref{launcher}, then
 itself becomes a control server.  itself becomes a control server.
 Several facilities related to {{\tt ox\_launch}} are provided  Several facilities related to {{\tt ox\_launch}} are provided
Line 20  of functions to execute the port generation, {\tt bind
Line 20  of functions to execute the port generation, {\tt bind
 {\tt connect} and {\tt accept} operations on sockets individually.  {\tt connect} and {\tt accept} operations on sockets individually.
   
 \subsubsection{Manipulating servers}  \subsubsection{Manipulating servers}
   Fundamental operations on OpenXM servers are
 Fundamental operations on OpenXM servers are sending and receiving  exchange of {\tt OX} data and sending of {\tt SM} commands.
 of {\tt OX} data and sending of {\tt OX} commands. The following functions  The following functions
 are provided to execute these primitive operations:  are provided to execute these primitive operations:
 {\tt ox\_push\_cmo()} for pushing data to a server,  {\tt ox\_push\_cmo()} for pushing data to a server,
 {\tt ox\_push\_cmd()} for sending an {\tt SM} command to a server  {\tt ox\_push\_cmd()} for sending an {\tt SM} command to a server
 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 41  it receives the data from the stream.
Line 41  it receives the data from the stream.
 \item {\tt ox\_cmo\_rpc()}  \item {\tt ox\_cmo\_rpc()}
   
 After pushing the name of a function, arguments and the number of the  After pushing the name of a function, arguments and the number of the
 arguments to the stack of a server, it request the server to execute  arguments to the stack of a server, it requests the server to execute
 the function. It does not wait the termination of the function call.  the function. It does not wait the termination of the function call.
   
 \item {\tt ox\_reset()}  \item {\tt ox\_reset()}
Line 49  the function. It does not wait the termination of the 
Line 49  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 to Mathematica by MathLink and  for Mathematica.
 to 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  
 which respectively correspond those in Risa/Asir.  
 \begin{quote}  \begin{quote}
 {\tt OxStart[s\_String]} \\  {\tt OxStart[s\_String]} \\
 {\tt OxStartInsecure[s\_String]} \\  {\tt OxStartInsecure[s\_String]} \\
Line 87  which respectively correspond those in Risa/Asir.
Line 86  which respectively correspond those in Risa/Asir.
 {\tt OxClose[]} \\  {\tt OxClose[]} \\
 {\tt OxReset[]}  {\tt OxReset[]}
 \end{quote}  \end{quote}
 For example, the {\tt OxPopCMO[]} function above requests a server to  Although the list of functions speaks itself,
 send data on the stack to the stream, then it receives the data from the  we add some explanations.
 stream.  The function {\tt OxPopCMO[]} executes the same operation
   as {\tt ox\_pop\_cmo()} in Risa/Asir;
 By using the {\tt OxParse[]} function, we can send suitable OX messages,  it pops data from the server stack.
 written by the OX expression, to a server.  OX expressions are  
 Lisp-like expressions for OX messages and are defined  
 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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