zOs/REXX/J
/* copy j begin *******************************************************
the j framework
jReset
jOpen
jClose
jRead
jWrite
**********************************************************************/
jRead: procedure expose m.
parse arg m
ix = m.m.readIx + 1
if ix > m.m.buf.0 then do
if m.m.jReading \== 1 then
return err('jRead('m') but not opened r')
if \ jReadBuf(m, m'.BUF') then
return 0
ix = 1
end
m.m.readIx = ix
m.m = m.m.buf.ix
return 1
endProcedure jRead
jReadBuf: procedure expose m.
parse arg m, rStem
interpret objMet(m, 'jRead')
m.m.bufI0 = m.m.bufI0 + m.rStem.0
return m.rStem.0 > 0
endProcedure jReadBuf
jReadVar: procedure expose m.
parse arg m, var
if arg() > 2 then call err '??? old interface' / 0
if \ jRead(m) then
return 0
m.var = m.m
return 1
endProcedure jReadVar
/*--- read next NonEmpty line ---------------------------------------*/
jReadNE: procedure expose m.
parse arg m
do while jRead(m)
if m.m <> '' then
return 1
end
return 0
endProcedure jReadNE
/*--- read next lines to stem ---------------------------------------*/
jReadSt: procedure expose m.
parse arg m, st
sx = 0
if m.m.readIx >= m.m.buf.0 then do
if jReadBuf(m, st) then
return 1
m.st.0 = 0
return 0
end
do rx = m.m.readIx+1 to m.m.buf.0
sx = sx + 1
m.st.sx = m.m.buf.rx
end
m.m.readIx = m.m.buf.0
m.st.0 = sx
return sx > 0
endProcedure jReadSt
jReadObRe: procedure expose m.
parse arg m
if arg() > 1 then call err '??? old interface' / 0
if jRead(m) then
return m.m
else
return ''
endProcedure jReadObRe
jReadO: procedure expose m.
parse arg m
if arg() > 1 then call err '??? old interface' /0
return jRead(m)
endProcedure jReadO
jWrite: procedure expose m.
parse arg m, line
ix = m.m.buf.0 + 1
m.m.buf.0 = ix
m.m.buf.ix = line
if ix > m.m.bufMax then
call jWriteBuf m
return
endProcedure jWrite
/*--- write the buf to destination ----------------------------------*/
jWriteBuf: procedure expose m.
parse arg m
if \ m.m.jWriting then
return err('jWrite('m') but not opened w')
wStem = m'.BUF'
interpret objMet(m, 'jWriteMax')
return
endProcedure jWriteBuf
jWriteSt: procedure expose m.
parse arg m, qStem
interpret objMet(m, 'jWriteSt')
return
endProcedure jWriteSt
jPosBefore: procedure expose m.
parse arg m, lx
interpret objMet(m, 'jPosBefore')
return m
endProcedure jPosBefore
jWriteAll: procedure expose m.
parse arg m, rdr
rdr = o2file(rdr)
met = objMet(m, 'jWriteAll')
if \ m.m.jWriting then
return err('jWriteAll('m',' rdr') but not opened w')
interpret met
return
endProcedure jWriteAll
jWriteNow: procedure expose m.
parse arg m, rdr
rdr = o2file(rdr)
interpret objMet(m, 'jWriteNow')
return
endProcedure jWriteNow
jCat: procedure expose m.
parse arg opt m
if m = '' then do
m = opt
opt = m.j.cWri
end
call jOpen m, opt
do ax=2 to arg()
call jWriteAll m, arg(ax)
end
call jClose m
return m
endProcedure jCat
jWriteNowImpl: procedure expose m.
parse arg m, rdr
call jOpen rdr, m.j.cRead
do while jRead(rdr)
if m.rdr.readIx == 1 then do
call jWriteSt m, rdr'.BUF'
m.rdr.readIx = m.rdr.buf.0
end
else
call jWrite m, m.rdr
end
call jClose rdr
return
endProcedure jWriteNow
/*--- reset JRW: fail if open, initialise ---------------------------*/
jReset0: procedure expose m.
parse arg m
if m.m.jReading == 1 | m.m.jWriting == 1 then
return err('still open jReset0('m')')
m.m.jUsers = 0
m.m.buf.0 = 0
m.m.wriMax = 0
call jCloseSet m
return m
endProcedure jReset0
jCloseSet: procedure expose m.
parse arg m
m.m.jReading = 0
m.m.jWriting = 0
m.m.readIx = 55e55
m.m.bufMax = -55e55
return m
endProcedure jCloseSet
jReset: procedure expose m.
parse arg m, arg, arg2
interpret objMet(m, 'oResetNoMut')
return m
endProcedure jReset
jOpen: procedure expose m.
parse arg m, opt
met = objMet(m, 'jOpen')
oUsers = m.m.jUsers
if opt = m.j.cRead then do
if m.m.jReading then
nop
else if m.m.jWriting then
return err('already opened for writing jOpen('m',' opt')')
else do
m.m.readIx = 0
m.m.bufI0 = 0
interpret met
m.m.jReading = 1
end
end
else if \ abbrev('>>', opt, 1) then do
return err('bad option' opt 'in jOpen('m',' opt')')
end
else do
if m.m.jWriting then
nop
else if m.m.jReading then
return err('already opened for reading jOpen('m',' opt')')
else do
m.m.bufI0 = 0
m.m.bufMax = m.m.wriMax
interpret met
m.m.jWriting = 1
end
end
m.m.jUsers = oUsers + 1
return m
endProcedure jOpen
/*--- close JRW flush buffer if writing ... -------------------------*/
jClose: procedure expose m.
parse arg m
oUsers = m.m.jUsers
if oUsers = 1 then do
if m.m.jWriting then do
wStem = m'.BUF'
interpret objMet(m, 'jWriteFlu')
end
interpret objMet(m, 'jClose')
call jCloseSet m
end
else if oUsers < 1 then
call err 'jClose' m 'but already closed'
m.m.jUsers = oUsers - 1
return m
endProcedure jClose
/*--- force physical close for errCleanup ---------------------------*/
jCloseClean: procedure expose m.
parse arg m
if m.m.jUsers = 0 then
return
m.m.jUsers = 1
return jClose(m)
endProcedure jCloseClean
/*--- cat the lines of the file together, with mid between lines,
fail if not all lines are strings -------------------*/
jCatLines: procedure expose m.
parse arg m, fmt
if abbrev(fmt, '-sql') then do
call err '-sql in jCatLines'
end
f2 = '%##fCatFmt' fmt
call jOpen m, m.j.cRead
if \ jRead(m) then do
call jClose m
return f(f2'%#0')
end
res = f(f2'%#1', m.m)
do while jRead(m)
res = res || f(f2, m.m)
end
call jClose m
return res || f(f2'%#r')
endProcedure jCatLines
jIni: procedure expose m.
if m.j.ini == 1 then
return
m.j.ini = 1
m.j.cRead = '<'
m.j.cWri = '>'
m.j.cApp = '>>'
call classIni
am = "call err 'call of abstract method"
cLa= classNew('n JRWLazy u LazyRun', 'm',
, "oReset" m.class_lazyRetMutate,
"'call jReset0 m;' classMet(cl, 'jReset')",
, "jWriteMax return classMet(cl, 'jWrite') '; m.m.buf.0 = 0'" ,
, "jWriteFlu return classMet(cl, 'jWriteMax')",
, "jWriteSt return 'if m.m.buf.0 <> 0" ,
"| m.qStem.0 < m.m.bufMax / 2 then do;" ,
"call mAddSt m''.BUF'', qStem;" ,
"if m.m.buf.0 > m.m.bufMax then do;" ,
"wStem = m''.BUF'';'" ,
"classMet(cl, 'jWriteMax')'; end; end;",
"else do; wStem = qStem;' classMet(cl, 'jWrite') ';end'",
)
c1 = classNew('n JRW u ORun, f JREADING v, f JWRITING v', 'm',
, "METHODLAZY" cLa,
, "jReset" ,
, "jRead" am "jRead('m')'" ,
, "jWrite" am "jWrite('m',' wStem')'" ,
, "jWriteAll call jWriteNowImpl m, rdr",
, "jWriteNow call jWriteNowImpl m, rdr",
, "jOpen" am" jOpen('m',' opt')'" ,
, "jClose" ,
, "oRun call pipeWriteAll m",
, "o2String return jCatLines(m, fmt)",
, "o2File return m")
call classNew 'n JRWDelegOC u JRW', 'm',
, "jReset m.m.deleg = arg;" ,
, "jOpen call jOpen m.m.deleg, opt" ,
, "jClose call jClose m.m.deleg"
call classNew 'n JRWDeleg u JRWDelegOC', 'm',
, "jRead if \ jReadSt(m.m.deleg, rStem) then return 0",
, "jWrite call jWriteSt m.m.deleg, wStem" ,
am = "call err 'call errObject"
call classNew 'n JRWErr u JRW', 'm',
, "jWriteAll" er "jWriteAll 'm', rdr'",
, "jWriteNow" er "jWriteNow 'm', 'rdr'",
, "jClose" er "jClose 'm'"
call classNew 'n JSay u JRW', 'm',
, "jWrite do wx=1 to m.wStem.0;say o2Text(m.wStem.wx,157);end",
, "jOpen if \ abbrev(opt, m.j.cWri) then",
"call err 'can only write JSay#jOpen('m',' opt')';"
call classNew 'n JRWEof u JRW', 'm',
, "jRead return 0",
, "jOpen if opt \=='<' then call err 'JRWEof#open('m',' opt')'"
m.j.in = jOpen(oNew('JRWEof'), m.j.cRead)
m.j.out = jOpen(oNew('JSay'), '>')
m.j.say = m.j.out
m.j.errRead = "return err('jRead('m') but not opened r')"
m.j.errWrite = "return err('jWrite('m',' line') but not opened w')"
call classNew "n JBuf u JRW, f BUF s r", "m",
, "jReset call jBufReset m, arg, arg2" ,
, "jOpen call jBufOpen m, opt",
, "jRead return 0",
, "jWriteMax call err 'buf overflow'",
, "jWriteFlu ",
, "jWriteSt call mAddSt m'.BUF', qStem" ,
, "jWrite call mAddSt m'.BUF', wStem;" ,
"if m.m.buf.0 > m.m.bufMax then call err 'buf overflow'",
, "jPosBefore m.m.readIx = m.m.readIx+0;m.m.readIx = lx-1"
return
endProcedure jIni
/*--- return a JRW from rdr or in -----------------------------------*/
in2File: procedure expose m.
parse arg m
interpret objMet(m, 'in2File')
return err('in2File did not return')
endProcedure in2File
/* jstr is part of out interface --> in2Str */
in2Str: procedure expose m.
parse arg m, fmt
interpret objMet(m, 'in2Str')
return err('in2Str did not return')
endProcedure in2Str
in2Buf: procedure expose m.
parse arg m
interpret objMet(m, 'in2Buf')
return err('in2Buf did not return')
endProcedure in2Buf
in: procedure expose m.
if arg() > 0 then call err '??? old interface'
r = m.j.in
m.in_ret = jRead(r)
m.in = m.r
return m.in_ret
endProcedure in
inVar: procedure expose m.
parse arg var
return jReadVar(m.j.in, var)
endProcedure inVar
inObRe: procedure expose m.
if arg() > 0 then call err '??? old interface'
return jReadObRe(m.j.in)
endProcedure inObRe
inO: procedure expose m.
if arg() > 0 then call err '??? old interface'
return in()
endProcedure inO
out: procedure expose m.
parse arg line
call jWrite m.j.out, line
return 0
endProcedure out
/*--- out (part of) the lines of a stem ----------------------------*/
outSt: procedure expose m.
parse arg st, fx, tx
do lx=word(fx 1, 1) to word(tx m.st.0, 1)
call out m.st.lx
end
return st
endProcedure outSt
outX: procedure expose m.
parse arg line
if symbol('m.tst_m') \== 'VAR' then
call jWrite m.j.out, line
else
call tstOut m.tst_m, line
return 0
endProcedure out
outO: procedure expose m.
parse arg arg
call out arg
return
endProcedure outO
/*--- jBuf: buffer read or write (supports datataypes) --------------*/
jBuf: procedure expose m.
m = oNew(m.class_jBuf) /* calls jBufReset */
do ax=1 to arg()
m.m.buf.ax = arg(ax)
end
m.m.buf.0 = ax-1
return m
endProcedure jBuf
/*--- jText: write text to deleg ------------------------------------*/
jText: procedure expose m.
parse arg rdr, opt
return oNew(jClassNew1sRdr('JText', 'm.m.maxL = arg2' , ,
, 'call mAdd rStem, o2Text($i, m.m.maxL)'),rdr, opt)
jBufReset: procedure expose m.
parse arg m
call oMutate m, m.class_jBuf
do ax=1 to arg() - 1
m.m.buf.ax = arg(ax+1)
end
m.m.buf.0 = ax-1
m.m.wriMax = 1e30
return m
endProcedure jBufReset
jBufOpen: procedure expose m.
parse arg m, opt
if opt == m.j.cRead then do
m.m.readIx = 0
return m
end
if opt == m.j.cWri then
m.m.buf.0 = 0
else if opt \== m.j.cApp then
call err 'jBufOpen('m',' opt') with bad opt'
return m
endProcedure jBufOpen
jBufCopy:
parse arg rdr
b = jOpen(jBuf(), m.j.cWri)
call jWriteNow b, rdr
return jClose(b)
endProcedure jBufCopy
jSingle: procedure expose m.
parse arg m
call jOpen m, '<'
one = jRead(m)
two = jRead(m)
call jClose m
if \ one then
if arg() < 2 then
call err 'empty file in jSingle('m')'
else
return arg(2)
if two then
call err '2 or more recs in jSingle('m')'
return m.m
endProcedure jSingle
/*--- lazily create a reader class for 1s protocol ------------------*/
jClassNew1sRdr: procedure expose m.
parse arg cla, reset, op, rd, cls
return classNew('n?' cla 'u JRWDelegOC', 'm',
, 'jReset m.m.delegSp = in2file(arg);' reset ,
, 'jOpen m.m.deleg = in2file(m.m.delegSp);' ,
'call jOpen m.m.deleg, opt;' op ,
, 'jRead if \ jRdr1sRead(m, rStem,' ,
quote(repAll(rd, '$i', 'm.dg.buf.ix'), '"'),
') then return 0' ,
, 'jWrite call jRdr1sWrite m, wStem,' ,
quote(repAll(rd, '$i', 'm.wStem.wx'), '"'),
, 'jClose' cls||left(';', cls <> '') 'call jClose m.m.deleg')
endProcedure jNewClassRdr1s
jRdr1sRead: procedure expose m.
parse arg m, rStem, add1s
m.rStem.0 = 0
dg = m.m.deleg
do while jRead(dg)
do ix = m.dg.readIx to m.dg.buf.0
interpret add1s
end
m.dg.readIx = ix - 1
if m.rStem.0 >= 100 then
return 1
end
return m.rStem.0 > 0
endProcedure jRdr1sRead
jRdr1sWrite: procedure expose m.
parse arg m, wStem, add1s
dg = m.m.deleg
rStem = dg'.BUF'
do wx=1 to m.wStem.0
interpret add1s
end
if m.rStem.0 > m.dg.bufMax then
call jWriteBuf dg
return
endProcedure jRdr1sWrite
/*--- jTalkRdr: say strings, out objects ----------------------------*/
jTalkRdr: procedure expose m.
parse arg rdr, opt
return oNew(jClassNew1sRdr('JTalkRdr', , ,
, "if oKindOfString($i) then say o2string($i);" ,
"else call mAdd rStem, $i"), rdr, opt)
/* copy j end ********************************************************/