/* REXX ELEMLEN This demonstration program will calculate the length of storage required for a PL/I declared variable. This rtn has few diagnostic features and is meant to be called only by another REXX rtn. Written by Frank Clarke 20010514 rexxhead@yahoo.com Impact Analysis . SYSPROC TRAPOUT Modification History 20021119 fxc upgrade from v.19991109 to v.20021008; 20040708 fxc recognize CTL and CONTROLLED 20051206 fxc QUIET; 20240423 fxc DUMP_QUEUE quiet; */ arg argline address TSO /* REXXSKEL ver.20021008 */ arg parms "((" opts signal on syntax signal on novalue call TOOLKIT_INIT /* conventional start-up -*/ rc = Trace("O"); rc = Trace(tv) info = parms /* to enable parsing */ call A_INIT /* -*/ call B_ANALYZE /* -*/ push parms response if \sw.nested then call DUMP_QUEUE 'quiet' /* -*/ exit /*@ ELEMLEN */ /* . ----------------------------------------------------------------- */ A_INIT: /*@ */ address TSO parse value "0 0 0 0 0 0 0 0 0 0 0 0" with, stg_len , . parse value "" with t1 t2, varn arrspec arrlim , response , . return /*@ A_INIT */ /* . ----------------------------------------------------------------- */ B_ANALYZE: /*@ */ address TSO call BA_GET_VARNAME /* -*/ call BB_WHAT_TYPE /* -*/ if sw.0nodata then return /* no data type */ call BC_CALC_SPACE /* -*/ if sw.0baseelem then do response = "Align on" baseelem return /* */ end /* BASED */ if sw.0baseptr then do response = "Pointer aligned" return /* */ end /* BASED */ if arrlim = "Indet" then, stg_tot = "Indet" else, stg_tot = stg_len * arrlim response = "Length" stg_len "Depth" arrlim "Total" stg_tot return /*@ B_ANALYZE */ /* Parse the variable name from the input. Is it an array-spec? . ----------------------------------------------------------------- */ BA_GET_VARNAME: /*@ */ address TSO parse var info t1 info /* first token */ if Datatype(t1,"W") then do /* whole number */ if t1 = 1 then sw.0lvl1 = 1 parse var info t1 info /* variable name */ end varn = t1 if Left(info,1) = "(" then, /* separated arrayspec */ parse var info "(" arrspec ")" info if arrspec <> "" then, varn = varn"("Space(arrspec,0)")" parse var varn "(" arrspec ")" /* maybe was original */ if arrspec = "" then arrlim = 1 /* not an array */ else, if Pos(":",arrspec) > 0 then do /* range */ parse var arrspec lolim ":" hilim if Datatype(hilim,"W") + Datatype(lolim,"W") < 2 then do arrlim = "Indet" if sw.0lvl1 then arrlim = 1 /* based or controlled */ end else, arrlim = hilim - lolim + 1 /* 3:5 = 5-3+1=3 */ end else arrlim = arrspec if Datatype(arrlim,"W") = 0 then arrlim = "Indet" return /*@ BA_GET_VARNAME */ /* Determine type: BIN, DEC, CHAR, PIC, PTR. What else? . ----------------------------------------------------------------- */ BB_WHAT_TYPE: /*@ */ address TSO slug = Space(info,0) /* squeeze all spaces out */ if slug = "" then do sw.0nodata = "1" response = "Group of" arrlim return /* has no type */ end info = Space(info,1) /* compress */ reserve = "" do while info <> "" if Left(info,3) = "DEC" then do if Left(info,7) = "DECIMAL" then L = 7 ; else L = 3 info = Delstr(info,1,L) sw.0decimal = "1" call BBP_SNIP_PAREN /* -*/ end /* DEC */ else, if Left(info,3) = "PIC" then do if Left(info,7) = "PICTURE" then L = 7 ; else L = 3 info = Delstr(info,1,L) sw.0pic = "1" call BBQ_SNIP_QUOTE /* -*/ end /* PIC */ else, if Left(info,3) = "BIN" then do if Left(info,6) = "BINARY" then L = 6 ; else L = 3 info = Delstr(info,1,L) sw.0binary = "1" call BBP_SNIP_PAREN /* -*/ end /* BIN */ else, if Left(info,3) = "BIT" then do info = Delstr(info,1,3) sw.0bit = "1" call BBP_SNIP_PAREN /* -*/ end /* BIT */ else, if Left(info,4) = "CHAR" then do if Left(info,9) = "CHARACTER" then L = 9 ; else L = 4 info = Delstr(info,1,L) sw.0char = "1" call BBP_SNIP_PAREN /* -*/ end /* CHAR */ else, if Left(info,3) = "VAR" then do if Left(info,7) = "VARYING" then L = 7 ; else L = 3 info = Strip(Delstr(info,1,L)) sw.0varchar = "1" end /* VAR */ else, if Left(info,3) = "CTL" then do info = Strip(Delstr(info,1,3)) sw.0Ctl = 1 if arrlim = "Indet" then arrlim = 1 end /* CTL */ else, if Left(info,10) = "CONTROLLED" then do info = Strip(Delstr(info,1,10)) sw.0Ctl = 1 if arrlim = "Indet" then arrlim = 1 end /* CONTROLLED */ else, if Left(info,5) = "BASED" then do info = Strip(Delstr(info,1,5)) if Left(info,5) = "(ADDR" then do parse var info "(" . "(" baseelem "))" info info = Space(info,1) /* compress */ sw.0baseelem = "1" end /* ADDR */ else do parse var info "(" baseptr ")" info info = Space(info,1) /* compress */ sw.0baseptr = "1" end /* */ end /* BASED */ else, if Left(info,3) = "PTR" then do L = 3 info = Delstr(info,1,L) info = Space(info,1) /* compress */ sw.0ptr = "1" end /* PTR */ else, if Left(info,7) = "POINTER" then do L = 7 info = Delstr(info,1,L) info = Space(info,1) /* compress */ sw.0ptr = "1" end /* POINTER */ else, if Left(info,5) = "FLOAT" then do L = 5 info = Delstr(info,1,L) info = Space(info,1) /* compress */ sw.0float = "1" call BBP_SNIP_PAREN /* -*/ end /* FLOAT */ else, if Left(info,5) = "FIXED" then do L = 5 info = Delstr(info,1,L) info = Space(info,1) /* compress */ sw.0fixed = "1" call BBP_SNIP_PAREN /* -*/ end /* FIXED */ else, do parse var info badt info if sw.0Quiet = 0 then, say "Unrecognized token:" badt end end /* while info <> empty */ return /*@ BB_WHAT_TYPE */ /* For CHAR, DEC, and BIN, bounded by bananas. . ----------------------------------------------------------------- */ BBP_SNIP_PAREN: /*@ */ address TSO info = Strip(info) if Left(info,1) <> "(" then return parse var info slug ")" info reserve = reserve slug")" info = Space(info,1) return /*@ BBP_SNIP_PAREN */ /* For PIC, what's between the quotes? . ----------------------------------------------------------------- */ BBQ_SNIP_QUOTE: /*@ */ address TSO info = Strip(info) if Left(info,1) <> "'" then return parse var info "'"slug "'" info reserve = reserve "'"slug"'" info = Space(info,1) return /*@ BBQ_SNIP_QUOTE */ /* How much storage is implied by the dataspec? . ----------------------------------------------------------------- */ BC_CALC_SPACE: /*@ */ address TSO if sw.0fixed | sw.0float then, if sw.0decimal + sw.0binary = 0 then, sw.0decimal = 1 if sw.0decimal then do parse var reserve "(" dataspec ")" reserve parse var dataspec dataspec "," stg_len = (dataspec+2)%2 /* 5+2 %2 = 3 */ end ; else, /* DEC */ if sw.0binary then do parse var reserve "(" dataspec ")" reserve parse var dataspec dataspec "," if dataspec < 16 then stg_len = 2 ; else, if dataspec < 32 then stg_len = 4 ; else, if dataspec < 64 then stg_len = 8 end ; else, /* BIN */ if sw.0bit then do parse var reserve "(" dataspec ")" reserve stg_len = (dataspec + 7) % 8 end ; else, /* BIN */ if sw.0char then do parse var reserve "(" dataspec ")" reserve stg_len = dataspec if sw.0varchar then stg_len = stg_len + 2 end ; else, /* CHAR */ if sw.0ptr then do stg_len = 4 end ; else, /* PTR */ if sw.0baseelem then do stg_len = 0 end ; else, /* BASEELEM */ if sw.0baseptr then do stg_len = 0 end ; else, /* BASEPTR */ if sw.0pic then do parse var reserve "'" dataspec "'" reserve pt = Pos(")",dataspec) if pt <> 0 then do /* multiplier... */ multspec = Substr(Dataspec,1,pt+1) dataspec = Delstr(Dataspec,1,pt+1) parse var multspec "(" factor ")" end ; else factor = 0 /* pt <> 0 */ dataspec = Translate(dataspec," ","V") dataspec = Space(dataspec,0) /* squeeze */ stg_len = Length(dataspec) + factor end /* PIC */ return /*@ BC_CALC_SPACE */ /* . ----------------------------------------------------------------- */ LOCAL_PREINIT: /*@ customize opts */ address TSO sw.0Quiet = SWITCH("QUIET") return /*@ LOCAL_PREINIT */ /* subroutines below LOCAL_PREINIT are not selected by SHOWFLOW */ /* . ----------------------------------------------------------------- */ HELP: /*@ */ address TSO;"CLEAR" if helpmsg <> "" then do ; say helpmsg; say ""; end ex_nam = Left(exec_name,8) /* predictable size */ say " "ex_nam" demonstrates how to calculate the storage occupied by a " say " PL/I variable by examining the declaration. " say " " say " Syntax: "ex_nam" " say " " say " text a single PL/I data declaration. The process does " say " not respond well to embedded comments. The routine " say " will determine whether this is an array and whether " say " it is binary, decimal, character or picture. If " say " picture, the spec is checked for a repetition spec " say " and this length is included in the total length. " "NEWSTACK"; pull ; "CLEAR" ; "DELSTACK" say " Debugging tools provided include: " say " " say " MONITOR: displays key information throughout processing. " say " " say " TRACE tv: will use value following TRACE to place the execution in" say " REXX TRACE Mode. " say " " say " " say " Debugging tools can be accessed in the following manner: " say " " say " TSO "ex_nam" parameters (( debug-options " say " " say " For example: " say " " say " TSO "ex_nam" (( MONITOR TRACE ?R " if sysvar("SYSISPF") = "ACTIVE" then, address ISPEXEC "CONTROL DISPLAY REFRESH" exit /*@ HELP */ /* . ----------------------------------------------------------------- */ BRANCH: Procedure expose, /*@ */ sigl exec_name rc = trace("O") /* we do not want to see this */ arg brparm . origin = sigl /* where was I called from ? */ do currln = origin to 1 by -1 /* inch backward to label */ if Right(Word(Sourceline(currln),1),1) = ":" then do parse value sourceline(currln) with pgfname ":" . /* Label */ leave ; end /* name */ end /* currln */ select when brparm = "NAME" then return(pgfname) /* Return full name */ when brparm = "ID" then do /* wants the prefix */ parse var pgfname pgfpref "_" . /* get the prefix */ return(pgfpref) end /* brparm = "ID" */ otherwise say left(sigl,6) left(pgfname,40) exec_name "Time:" time("L") end /* select */ return /*@ BRANCH */ /* . ----------------------------------------------------------------- */ DUMP_QUEUE: /*@ Take whatever is in stack */ rc = trace("O") /* and write to the screen */ address TSO arg mode . "QSTACK" /* how many stacks? */ stk2dump = rc - tk_init_stacks /* remaining stacks */ if stk2dump = 0 & queued() = 0 then return if mode <> "QUIET" then, say "Total Stacks" rc , /* rc = #of stacks */ " Begin Stacks" tk_init_stacks , /* Stacks present at start */ " Excess Stacks to dump" stk2dump do dd = rc to tk_init_stacks by -1 /* empty each one. */ if mode <> "QUIET" then, say "Processing Stack #" dd " Total Lines:" queued() do queued();parse pull line;say line;end /* pump to the screen */ "DELSTACK" /* remove stack */ end /* dd = 1 to rc */ return /*@ DUMP_QUEUE */ /* Handle CLIST-form keywords added 20020513 . ----------------------------------------------------------------- */ CLKWD: Procedure expose info /*@ hide all except info */ arg kw kw = kw"(" /* form is 'KEY(DATA)' */ kw_pos = Pos(kw,info) /* find where it is, maybe */ if kw_pos = 0 then return "" /* send back a null, not found*/ rtpt = Pos(") ",info" ",kw_pos) /* locate end-paren */ slug = Substr(info,kw_pos,rtpt-kw_pos+1) /* isolate */ info = Delstr(info,kw_pos,rtpt-kw_pos+1) /* excise */ parse var slug (kw) slug /* drop kw */ slug = Reverse(Substr(Reverse(Strip(slug)),2)) return slug /*@CLKWD */ /* Handle multi-word keys 20020513 . ----------------------------------------------------------------- */ KEYWD: Procedure expose info /*@ hide all vars, except info*/ arg kw kw_pos = wordpos(kw,info) /* find where it is, maybe */ if kw_pos = 0 then return "" /* send back a null, not found*/ kw_val = word(info,kw_pos+Words(kw))/* get the next word */ info = Delword(info,kw_pos,2) /* remove both */ return kw_val /*@ KEYWD */ /* . ----------------------------------------------------------------- */ KEYPHRS: Procedure expose, /*@ */ info helpmsg exec_name /* except these three */ arg kp wp = wordpos(kp,info) /* where is it? */ if wp = 0 then return "" /* not found */ front = subword(info,1,wp-1) /* everything before kp */ back = subword(info,wp+1) /* everything after kp */ parse var back dlm back /* 1st token must be 2 bytes */ if length(dlm) <> 2 then /* Must be two bytes */ helpmsg = helpmsg "Invalid length for delimiter("dlm") with KEYPHRS("kp")" if wordpos(dlm,back) = 0 then /* search for ending delimiter*/ helpmsg = helpmsg "No matching second delimiter("dlm") with KEYPHRS("kp")" if helpmsg <> "" then call HELP /* Something is wrong */ parse var back kpval (dlm) back /* get everything b/w delim */ info = front back /* restore remainder */ return Strip(kpval) /*@ KEYPHRS */ /* . ----------------------------------------------------------------- */ NOVALUE: /*@ */ say exec_name "raised NOVALUE at line" sigl say " " say "The referenced variable is" condition("D") say " " zsigl = sigl signal SHOW_SOURCE /*@ NOVALUE */ /* . ----------------------------------------------------------------- */ SHOW_SOURCE: /*@ */ call DUMP_QUEUE /* Spill contents of stacks -*/ if sourceline() <> "0" then /* to screen */ say sourceline(zsigl) rc = trace("?R") nop exit /*@ SHOW_SOURCE */ /* . ----------------------------------------------------------------- */ SS: Procedure /*@ Show Source */ arg ssbeg ssend . if ssend = "" then ssend = 10 if \datatype(ssbeg,"W") | \datatype(ssend,"W") then return ssend = ssbeg + ssend do ssii = ssbeg to ssend ; say Strip(sourceline(ssii),'T') ; end return /*@ SS */ /* . ----------------------------------------------------------------- */ SWITCH: Procedure expose info /*@ */ arg kw sw_val = Wordpos(kw,info) > 0 /* exists = 1; not found = 0 */ if sw_val then /* exists */ info = Delword(info,Wordpos(kw,info),1) /* remove it */ return sw_val /*@ SWITCH */ /* . ----------------------------------------------------------------- */ SYNTAX: /*@ */ errormsg = exec_name "encountered REXX error" rc "in line" sigl":", errortext(rc) say errormsg zsigl = sigl signal SHOW_SOURCE /*@ SYNTAX */ /* Can call TRAPOUT. . ----------------------------------------------------------------- */ TOOLKIT_INIT: /*@ */ address TSO info = Strip(opts,"T",")") /* clip trailing paren */ parse source sys_id how_invokt exec_name DD_nm DS_nm, as_invokt cmd_env addr_spc usr_tokn parse value "" with tv helpmsg . parse value 0 "ISR00000 YES" "Error-Press PF1" with, sw. zerrhm zerralrm zerrsm if SWITCH("TRAPOUT") then do "TRAPOUT" exec_name parms "(( TRACE R" info exit end /* trapout */ sw.nested = sysvar("SYSNEST") = "YES" sw.batch = sysvar("SYSENV") = "BACK" sw.inispf = sysvar("SYSISPF") = "ACTIVE" if Word(parms,1) = "?" then call HELP /* I won't be back */ "QSTACK" ; tk_init_stacks = rc /* How many stacks? */ parse value SWITCH("BRANCH") SWITCH("MONITOR") SWITCH("NOUPDT") with, branch monitor noupdt . parse value mvsvar("SYSNAME") sysvar("SYSNODE") with, #tk_cpu node . parse value KEYWD("TRACE") "N" with tv . tk_globalvars = "exec_name tv helpmsg sw. zerrhm zerralrm ", "zerrsm zerrlm tk_init_stacks branch monitor ", "noupdt" call LOCAL_PREINIT /* for more opts -*/ return /*@ TOOLKIT_INIT */