comterp

Langue: en

Autres versions - même langue

Version: 330740 (ubuntu - 24/10/10)

Section: 1 (Commandes utilisateur)

NAME

comterp - distributed command interpreter demonstrator

SYNOPSIS

comterp
comterp remote
comterp server 'portnum'
comterp logger 'portnum'
comterp client 'host' 'portnum' ['file']
comterp telcat 'host' 'portnum' ['file']
comterp run 'file'

DESCRIPTION

comterp demonstrates the command interpreter incorporated into ivtools. A user (or client program) can interact with comterp via stdin and stdout or telnet (when ACE is built in). The command syntax is a semi-colon separated list of commands with arbitrary number of parameters enclosed in parenthesis, with support for optional parameters and keyword arguments, i.e:


       command2(arg1 arg2 arg3 :key1 val1 :key2 val2);
       command1(arg1 arg2 arg3 :key1 val1 :key2 val2)

C-like binary expressions can be embedded anywhere in the command language, using the operators in the table below. Variables can be created on the fly with an assignment operator (i.e "ball=1" creates a integer "ball" variable set to 1). Unterminated expressions cause an automatic command line extension (until the parser determines the expression is complete). "(), "{}", and "[]" can all be used interchangeably.

COMMAND OPTIONS

comterp

Invoke a single command interpreter to interact with via stdin and stdout.

comterp remote

Invoke a single command interpreter, like the default, and include a remote command for accessing other comterp's in server mode.

comterp server 'portnum'

Listens for and accept connections on portnum, then setup a command interpreter to wait for and process commands from that connection.

comterp logger 'portnum'

Listens for and accept connections on portnum, then simply forward the incoming messages to stdout, while ack'ing back with newlines. For debugging purposes, not really a use of the interpreter.

comterp client 'host' 'portnum' ['file']

Connect to a portnum on a host and send/receive new-line terminated text buffers. For debugging purposes, not really a use of the interpreter.

comterp telcat 'host' 'portnum' ['file']

Connect to a portnum on a host, cat the file, then close the connection. Not really a use of the interpreter either.

comterp run 'file'

Run contents of file then exit.

OPERATOR TABLE

     Operators  Command Name   Priority    Order       Type
     ---------  ------------   --------    -----       ----
     .          dot            130         R-to-L      binary
     `          bquote         125         R-to-L      unary-prefix
     $          stream         125         R-to-L      unary-prefix
     !          negate         110         R-to-L      unary-prefix
     ~          bit_not        110         R-to-L      unary-prefix
     ++         incr           110         R-to-L      unary-prefix
     ++         incr_after     110         R-to-L      unary-postfix
     -          minus          110         R-to-L      unary-prefix
     --         decr           110         R-to-L      unary-prefix
     --         decr_after     110         R-to-L      unary-postfix
     **         repeat         90          L-to-R      binary
     ..         iterate        80          L-to-R      binary
     %          mod            70          L-to-R      binary
     *          mpy            70          L-to-R      binary
     /          div            70          L-to-R      binary
     +          add            60          L-to-R      binary
     -          sub            60          L-to-R      binary
     <<         lshift         55          L-to-R      binary
     >>         rshift         55          L-to-R      binary
     <          lt             50          L-to-R      binary
     <=         lt_or_eq       50          L-to-R      binary
     >          gt             50          L-to-R      binary
     >=         gt_or_eq       50          L-to-R      binary
     !=         not_eq         45          L-to-R      binary
     ==         eq             45          L-to-R      binary
     &          bit_and        44          L-to-R      binary
     ^          bit_xor        43          L-to-R      binary
     |          bit_or         42          L-to-R      binary
     &&         and            41          L-to-R      binary
     ||         or             40          L-to-R      binary
     ,          tuple          35          L-to-R      binary
     ,,         concat         33          L-to-R      binary
     %=         mod_assign     30          R-to-L      binary
     *=         mpy_assign     30          R-to-L      binary
     +=         add_assign     30          R-to-L      binary
     -=         sub_assign     30          R-to-L      binary
     /=         div_assign     30          R-to-L      binary
     =          assign         30          R-to-L      binary
     ;          seq            10          L-to-R      binary
 

MATHEMATICAL COMMANDS:


 n=min(a b) -- return minimum of a and b


 n=max(a b) -- return maximum of a and b


 n=abs(a) -- return absolute value of a


 dbl=exp(x) -- returns the value e raised to the power of x


 dbl=log(x) -- returns the natural logarithm of x


 dbl=log10(x) -- returns the base-10 logarithm of x


 dbl=pow(x y) -- returns the value of x raised to the power of y


 dbl=acos(x) -- returns the arc cosine of x in radians


 dbl=asin(x) -- returns the arc sine of x in radians


 dbl=atan(x) -- returns the arc tangent of x in radians


 dbl=atan2(y x) -- returns the arc tangent of y over x


 dbl=cos(x) -- returns the cosine of x radians


 dbl=sin(x) -- returns the sine of x radians


 dbl=tan(x) -- returns the tangent of x radians


 dbl=sqrt(x) -- returns square root of x


 dbl=pi() -- returns the value of pi


 dbl=radtodeg(dbl) -- convert radians to degrees


 dbl=degtorad(dbl) -- convert degrees to radians


 num=floor(num) -- return closest integer value less than or equal to argument


 num=ceil(num) -- return closest integer value greater than or equal to argument


 num=round(num) -- return closest integer value

AFFINE TRANSFORM AND MATRIX COMMANDS:


 point=xform(x,y a00,a01,a10,a11,a20,a21) -- affine transform of x,y coordinates


 affine=invert(a00,a01,a10,a11,a20,a21) -- invert affine transform


 matrix=xpose(matrix) -- transpose an arbitrary matrix


 matrix=matrix*matrix -- matrix multiplication

STATISTICAL/RANDOM COMMANDS:


 sum(val1[,val2[,...,valn]]) -- return sum of values


 mean(val1[,val2[,...,valn]]) -- return mean of values


 var(val1[,val2[,...,valn]]) -- return variance of values


 stddev(val1[,val2[,...,valn]]) -- return standard deviation of values


 rand([minval,maxval]) -- return random number between 0 and 1 or minval,maxval


 srand(seedval) -- seed random number generator

LIST COMMANDS:


 
 lst=list([olst|strm|val] :strmlst) -- create list, copy list, or convert stream


 val=at(list|attrlist n :set val) -- return (or set) nth item in a list


 num=size(list|attrlist) -- return size of a list

STREAM COMMANDS:


 
 val=next(stream) -- return next value from stream


 strm=stream(ostrm|list) -- copy stream or convert list


 cnt=each(strm) -- traverse the stream returning its length

CONTROL COMMANDS (using post evaluation):


 val=cond(testexpr trueexpr falseexpr) -- evaluate testexpr, and if true, evaluate and return trueexpr, otherwise evaluate and return falseexpr


 val=if(testexpr :then expr :else expr) -- evaluate testexpr and execute the :then expression if true, the :else expression if false.


 val=for(initexpr whileexpr [nextexpr [bodyexpr]] :body expr) -- for loop


 val=while([testexpr [bodyexpr]] :nilchk :until :body expr ) -- while loop

OTHER COMMANDS


 help(cmdname [cmdname ...] :all :posteval) -- help for commands


 val=trace([flag] :get) -- toggle or set trace mode


 [str]=print(fmtstr val :string|:str :err) -- print value with format string
 [str]=print(val :string|:str :err) -- print value


 int|lst=symid(symbol [symbol ...]) -- return integer id(s) associated with symbol(s)


 sym|lst=symbol(symid [symid ...]) -- return symbol(s) associated with integer id(s)


 val|lst=symval(symbol [symbol ...]) -- return value(s) associated with symbol variables(s)


 sym|lst=symadd(symbol [symbol ...]) -- create symbol(s) and return without lookup.


 lst=split(symbol|string) -- split symbol or string into list of characters.


 str=join(clist :sym) -- join list of characters into string


 bool=eq(str1 str2 :n len) -- partial string comparison


 bool=eq(sym1 sym2 :sym) -- symbol comparison


 postfix(arg1 [arg2 [arg3 ... [argn]]]) -- echo unevaluated postfix arguments (with [narg|nkey] after defined commands, {narg|nkey} after undefined commands, (narg) after keys, and a * following post-evaluation commands)


 arr=posteval(arg1 [arg2 [arg3 ... [argn]]]) -- post-evaluate every fixed argument (until nil) and return array                                 

 sym=attrname(attribute) -- return name field of dotted pair
 val=attrval(attribute) -- return value field of dotted pair
 dotlst=dot(name) -- construct empty dotted pair list   


 quit() -- quit the interpreter


 exit() -- exit entire application


 val=run(filename) -- run commands from file


 val=remote(hoststr portnum cmdstr :nowait) -- remotely evaluate command string then locally evaluate result string


 val=eval(cmdstr [cmdstr ...] :symret ) -- evaluate string as commands, optionally return symbol instead of nil


 val=shell(cmdstr) -- evaluate command in shell


 usleep(msec) -- sleep microseconds


 mute([flag]) -- set or toggle mute flag


 nil([...]) -- accept any arguments and return nil


 c=char(num) -- convert any numeric to a char


 s=short(num) -- convert any numeric to a short


 i=int(num) -- convert any numeric to an int


 l=long(num) -- convert any numeric to a long


 f=float(num) -- convert any numeric to a float


 d=double(num) -- convert any numeric to a double


 sym|lst=type(val [val ...]) -- return type symbol(s) for value(s)


 sym|lst=class(val [val ...]) -- return class symbol(s) for value(s) of object type

ONLY IN SERVER MODE

str=timeexpr(comstr :sec n) -- command string to execute at intervals

SEE ALSO

       comdraw

WEB PAGES

        http://www.ivtools.org/ivtools/comterp.html