/* REXX AMORTIZE Produce a report showing the progress of an amortization (mortgage). Syntax: AMORTIZE AT FROM PAYMENT Written by Frank Clarke in the Dark Ages Impact Analysis . SYSPROC TRAPOUT Modification History 20010718 fxc restructured */ arg argline address TSO /* REXXSKEL ver.20010524 */ arg parms "((" opts signal on syntax signal on novalue call TOOLKIT_INIT /* conventional start-up -*/ rc = trace(tv) info = parms /* to enable parsing */ call A_INIT /* -*/ "NEWSTACK" call B_HDR /* -*/ call C_CALC /* -*/ call D_LAST_PMT /* -*/ "DELSTACK" if \sw.nested then call DUMP_QUEUE /* -*/ exit /*@ AMORTIZE */ /* . ----------------------------------------------------------------- */ A_INIT: /*@ */ if branch then call BRANCH address TSO percentage = KEYWD("AT") start_yyyymm = KEYWD("FROM") pmnt_amt = KEYWD("PAYMENT") parse var parms prin_amt . if percentage = "" then call HELP if start_yyyymm = "" then call HELP if prin_amt = "" then call HELP if pmnt_amt = "" then call HELP parse var start_yyyymm yyyy 5 mm 7 . if datatype(yyyy) = "CHAR" |, datatype(mm) = "CHAR" then call HELP if mm < 1 | mm > 12 then call HELP prin_amt = Format(prin_amt,,2) pmnt_amt = Format(pmnt_amt,,2) eff_pct = (percentage/1200) net_amt = prin_amt total_int = 0 return /*@ A_INIT */ /* . ----------------------------------------------------------------- */ B_HDR: /*@ */ if branch then call BRANCH address TSO line = "Amortizing" , prin_amt "from" , yyyy mm "at" , percentage"% per annum by", pmnt_amt "per period." rc = Output(line) rc = Output(" ") line = " YYYY MM Principal Net Payment Intere" ||, "st New Net Amt Total Int" rc = Output(line) line = " ---- -- ----------- ------------ ----------" ||, "-- ------------ ------------" rc = Output(line) return /*@ B_HDR */ /* . ----------------------------------------------------------------- */ C_CALC: /*@ */ if branch then call BRANCH address TSO do until net_amt < pmnt_amt /* last pmnt is usu partial */ curr_int = net_amt * eff_pct /* monthly interest */ curr_int = Format(curr_int,,2) new_net_amt = net_amt + curr_int - pmnt_amt total_int = total_int + curr_int net_pmnt = pmnt_amt - curr_int line = Right(yyyy,7) Right(mm,2,0) Right(net_amt,12), Right(net_pmnt,12) Right(curr_int,12), Right(new_net_amt,12) Right(total_int,12) net_amt = new_net_amt /* set for next cycle */ rc = Output(line) mm = mm + 1 /* bump month */ if mm > 12 then do mm = mm // 12 yyyy = yyyy + 1 /* next year */ end end /* until worn down */ return /*@ C_CALC */ /* . ----------------------------------------------------------------- */ D_LAST_PMT: /*@ */ if branch then call BRANCH address TSO curr_int = net_amt * eff_pct /* interest for last pmnt */ curr_int = Format(curr_int,,2) pmnt_amt = net_amt + curr_int /* calc short payment */ new_net_amt = net_amt + curr_int - pmnt_amt /* must be zero */ total_int = total_int + curr_int net_pmnt = pmnt_amt - curr_int /* =net_amt */ line = Right(yyyy,7) Right(mm,2,0) Right(net_amt,12), Right(net_pmnt,12) Right(curr_int,12), Right(new_net_amt,12) Right(total_int,12) net_amt = new_net_amt /* must be zero */ rc = Output(line) call PURGE return /*@ D_LAST_PMT */ /* . ----------------------------------------------------------------- */ OUTPUT: /*@ */ address TSO parse arg text queue text return 0 /*@ OUTPUT */ /* . ----------------------------------------------------------------- */ PURGE: /*@ */ if branch then call BRANCH address TSO "ALLOC FI(TMP) DA(misc.text(am)) SHR REU" "EXECIO" queued() "DISKW TMP (FINIS" address ISPEXEC "EDIT DATASET(misc.text(am))" return /*@ PURGE */ /* . ----------------------------------------------------------------- */ LOCAL_PREINIT: /*@ customize opts */ address TSO 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" Produce a report showing the progress of an " say " amortization (mortgage). " say " " say " Syntax: "ex_nam" " say " AT " say " FROM " say " PAYMENT " say " " say " is the amount to be amortized. It will be " say " formatted to two decimal places. " say " " say " is the annual percentage rate. " say " " say " is the month of first payment. Enter a 6-digit " say " number composed of 4-digit year and 2-digit month" say " " say " is the monthly payment amount. " say " " "NEWSTACK"; pull ; "CLEAR" ; "DELSTACK " say " Debugging tools provided include: " say " " say " MONITOR: displays key information throughout processing. " say " " say " NOUPDT: by-pass all update logic. " say " " say " BRANCH: show all paragraph entries. " say " " say " TRACE tv: will use value following TRACE to place the " say " execution in 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 " .*/ 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 "QSTACK" /* how many stacks? */ stk2dump = rc - tk_init_stacks /* remaining stacks */ if stk2dump = 0 & queued() = 0 then return say "Total Stacks" rc , /* rc = #of stacks */ "Begin Stacks" tk_init_stacks , /* Stacks present at start */ "Stacks to DUMP" stk2dump do dd = rc to tk_init_stacks by -1 /* empty each one. */ say "Processing Stack #" dd "Total Lines:" queued() do queued();pull line;say line;end /* pump to the screen */ "DELSTACK" /* remove stack */ end /* dd = 1 to rc */ return /*@ DUMP_QUEUE */ /* . ----------------------------------------------------------------- */ 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+1) /* 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 sourceline(ssii) ; 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 */ 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 . sw.nested = sysvar("SYSNEST") = "YES" sw.batch = sysvar("SYSENV") = "BACK" sw.inispf = sysvar("SYSISPF") = "ACTIVE" parse value KEYWD("TRACE") "O" 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 */