=================================================================== RCS file: /home/cvs/OpenXM/doc/issac2000/openxm-stackmachines.tex,v retrieving revision 1.7 retrieving revision 1.9 diff -u -p -r1.7 -r1.9 --- OpenXM/doc/issac2000/openxm-stackmachines.tex 2000/01/14 10:45:10 1.7 +++ OpenXM/doc/issac2000/openxm-stackmachines.tex 2000/01/15 12:18:42 1.9 @@ -1,18 +1,18 @@ -% $OpenXM: OpenXM/doc/issac2000/openxm-stackmachines.tex,v 1.6 2000/01/13 10:54:33 ohara Exp $ +% $OpenXM: OpenXM/doc/issac2000/openxm-stackmachines.tex,v 1.8 2000/01/15 03:46:27 noro Exp $ -\section{OpenXM Stack machines}\label{sec:ox-stackmachines} (Tamura) +\section{OpenXM Stack machines}\label{sec:ox-stackmachines} In OpenXM specification, all servers are stack machines. -These are called OpenXM stack machines. +%These are called OpenXM stack machines. When a server ox\_xyz gets an OX data message, -it translates the data into an object of its local mathematical system -and push the object on the stack. -The translation scheme together with definitions of mathematical operations -of the system ox\_xyz is called the {\it PhraseBook} of -ox\_xyz following the OpenMath specification. +it translates the data into a local object of ox\_xyz +and pushes the object onto the stack. +According to the OpenMath specification, +the translation scheme together with definitions of mathematical operations +of the system ox\_xyz is called the {\it PhraseBook} of ox\_xyz. Any OX command message starts with the int32 tag OX\_COMMAND. -The body is OpenXM stack machine operation code expressed by int32. +The body is an OpenXM stack machine operation code expressed by int32. The codes are listed below. \begin{verbatim} #define SM_popSerializedLocalObject 258 @@ -31,8 +31,6 @@ The codes are listed below. #define SM_executeStringByLocalParserInBatchMode 274 #define SM_getsp 275 #define SM_dupErrors 276 -#define SM_DUMMY_sendcmo 280 -#define SM_sync_ball 281 #define SM_control_kill 1024 #define SM_control_to_debug_mode 1025 #define SM_control_exit_debug_mode 1026 @@ -40,20 +38,25 @@ The codes are listed below. \end{verbatim} OpenXM does not have a standard for mathematical operation sets -while it is a work in progress in \cite{gap}. -Each OpenXM server has its own mathematical operation set. -Mathematical operations are performed as follows. -Mathematical operator name, such as fctr (asir factorization command), -is pushed as a string, -the stack machine command -SM\_executeFunction (269) pops the operator name, the number of arguments -and arguments, and -the OX stack machine evaluates the operator, and pushes the result on the stack. +while it is a work in progress in the GAP group \cite{gap}. +Each OpenXM server has its own set of mathematical operations, +which are performed as follows. +First, arguments for a mathematical operation +and the number of the arguments are pushed. +Second, +the mathematical operator name, +such as {\tt fctr} (asir factorization command), +is pushed as a string. +Finally, the stack machine command +{\tt SM\_executeFunction} (269) evaluates the operator and +pushes the result onto the stack +after poping the operator name, the number of arguments +and arguments. For example, the following code factorizes $x^{100}-1$ by calling -ox\_asir from asir. +{\tt ox\_asir} from asir. \begin{verbatim} P = ox_launch(); -ox_push_cmo(P,x^100-1); ox_push_cmo(P,ox_int32(1)); +ox_push_cmo(P,x^100-1); ox_push_cmo(P,ntoint32(1)); ox_push_cmd(P,269); Ans = ox_pop_cmo(P); \end{verbatim} @@ -69,10 +72,10 @@ error([8,fctr : invalid argument]) \end{verbatim} OpenXM server won't send error messages to the client -except when it receives a SM\_pop* command. -OX stackmachines works in the asynchronous mode which is similar +except when it receives a {\tt SM\_pop*} command. +OX stackmachines work in the asynchronous mode which is similar to X servers. -For servers for graphic applications, it is an advantageous feature. +For servers for graphic and sound applications, it is an advantageous feature. It is also easy to emulate RPC and a web server for MCP \cite{iamc} on our asynchronous OX stackmachines.