zOs/REXX/MATCH
/* copy match begin **************************************************/
/*--- wildCard matching with the following wildchars:
* 0-n chars
? 1 char
fill matched expressions instem st if st is non empty
return 1 if mask matches wert ---------------------------------*/
match: procedure expose m.
parse arg wert, mask
if symbol('m.match_m.mask') == 'VAR' then
interpret m.match_m.mask
else
interpret matchGen('MATCH_M.'mask, mask, 'm')
endProcedure match
matchGG: procedure expose m.
parse arg wert, cd, vars
interpret cd
endProcedure matchGG
matchVars: procedure expose m.
parse arg wert, mask, vars
if symbol('m.match_v.mask') == 'VAR' then
interpret m.match_v.mask
else
interpret matchGen('MATCH_V.'mask, mask, 'v')
endProcedure match
matchRep: procedure expose m.
parse arg wert, mask, mOut
vars = 'MATCH_VV'
mm = mask'\>'mOut
if symbol('m.match_r.mm') == 'VAR' then
interpret m.match_r.mm
else
interpret matchGen('MATCH_R.'mm, mask, 'r', mOut)
endProcedure matchRep
matchGen: procedure expose m.
parse arg m, mask, opt, mOut
a = matchScan(match_sM, mask)
if symbol('m.match_g') \== 'VAR' then
m.match_g = 0
if opt \== 'r' then do
r = matchgenMat(a, opt, 1, m.a.0, 0)
end
else do
m.match_g = m.match_g + 1
sub = 'MATCH_G'm.match_g
m.sub = matchgenMat(a, 'v', 1, m.a.0, 0)
o = matchScan(match_sO, mOut)
r = matchGenRep(o, m.a.wildC)
r = 'if matchGG(wert, m.'sub', vars) then return' r';' ,
'else return "";'
end
m.m = r
return r
endProcedure matchGen
matchScan: procedure expose m.
parse arg a, mask, opt
s = match_scan
call scanSrc s, mask
ax = 0
vx = 0
m.a.wildC = ''
do forever
if scanUntil(s, '*?&\') then do
if m.a.ax == 'c' then do
m.a.ax.val = m.a.ax.val || m.s.tok
end
else do
ax = ax + 1
m.a.ax = 'c'
m.a.ax.val = m.s.tok
end
end
else if scanChar(s, 1) then do
if pos(m.s.tok, '*?') > 0 then do
ax = ax + 1
vx = vx + 1
m.a.ax = m.s.tok
m.a.ax.ref = vx
m.a.wildC = m.a.wildC || m.s.tok
end
else if m.s.tok == '\' then do
call scanChar s, 1
if pos(m.s.tok, '\*?&') < 1 then
return scanErr(s, 'bad char after \')
if abbrev(m.a.ax, 'c') then
m.a.ax.val = m.a.ax.val || m.s.tok
else do
ax = ax + 1
m.a.ax = 'c'
m.a.ax.val = m.s.tok
end
end
else if m.s.tok == '&' then do
if opt \== 'r' then
call scanErr s, '& in input'
if \ scanChar(s,1) | pos(m.s.tok, 'ms123456789')<1 then
call scanErr s, 'bad & name' m.s.tok
ax = ax + 1
m.a.ax = '&'
m.a.ax.ref = m.s.tok
end
else
call scanErr s, 'bad char 1 after until'
end
else
leave
end
m.a.0 = ax
if vx \== length(m.a.wildC) then
call scanErr 'vars' m.a.wildC 'mismatches' vx
return a
endProcedure matchScan
matchGenMat: procedure expose m.
parse arg a, opt, fx, tx, minLL
ml = 0
if fx == 1 then do
do ax=1 to m.a.0
if m.a.ax == '?' then
ml = ml + 1
else if m.a.ax == 'c' then
ml = ml + length(m.a.ax.val)
m.a.minLen.ax = ml
end
end
r = ''
ret1 = ''
ret1After = ''
lO = 0
do fy=fx to tx
if m.a.fy == 'c' then do
r = r 'if substr(wert,' (1+lO)
if fy < m.a.0 then
r = r',' length(m.a.fy.val)
r = r') \==' quote(m.a.fy.val, "'") 'then return 0;'
lO = lO + length(m.a.fy.val)
end
else if m.a.fy == '?' then do
lO = lO + 1
if opt == 'v' then
ret1 = ret1 'm.vars.'m.a.fy.ref ,
'= substr(wert,' lO', 1);'
end
else if m.a.fy == '*' then
leave
else
call err 'bad match ast' a'.'fy m.a.fy
end
rO = 0
do ty=tx by -1 to fy
if m.a.ty == 'c' then do
rO = rO + length(m.a.ty.val)
r = r 'if substr(wert, length(wert) -' (rO - 1)',' ,
length(m.a.ty.val)')' ,
'\==' quote(m.a.ty.val, "'") 'then return 0;'
end
else if m.a.ty == '?' then do
rO = rO + 1
if opt == 'v' then
ret1 = ret1 'm.vars.'m.a.fy.ref ,
'= substr(wert, length(wert) -' (rO-1)', 1);'
end
else if m.a.ty == '*' then
leave
else
call err 'bad match ast' a'.'fy m.a.fy
end
if fy > ty then do /* every thing is handled with fix len */
if fx = tx & abbrev(m.a.fx, 'c') then
r = 'if wert \==' quote(m.a.fx.val, "'") ,
'then return 0;'
else
r = 'if length(wert) \==' (lO + rO) 'then return 0;' r
end
else do
myMiLe = m.a.minLen.ty
if fy > 1 then do
fq = fy -1
myMiLe = myMiLe - m.a.minLen.fq
end
if minLL < myMiLe then
r = 'if length(wert) <' myMiLe 'then return 0;' r
if fy = ty & m.a.fy == '*' then /* single * */
ret1 = ret1 'm.vars.'m.a.fy.ref ,
'= substr(wert,' (1+lO)', length(wert) -' (lO+rO)');'
else if fy < ty & abbrev(m.a.fy, '*') ,
& abbrev(m.a.ty, '*') then do
/* several variable length parts */
suMiLe = m.a.minLen.ty - m.a.minLen.fy
m.match_g = m.match_g + 1
sub = 'MATCH_G'm.match_g
m.sub = matchGenMat(a, opt, fy+1, ty, suMiLe)
if rO = 0 then
subV = 'substr(wert, lx)'
else do
r = r 'wSub = left(wert, length(wert) -' rO');'
subV = 'substr(wSub, lx)'
end
r = r 'do lx = length(wert) -' (suMiLe+rO-1) ,
'by -1 to' (lO+1)';' ,
'if \ matchGG('subV', m.'sub', vars) then' ,
'iterate;'
ret1 = ret1 'm.vars.'m.a.fy.ref '= substr(wert,' (lO+1) ,
|| ', lx -' (lO+1)');'
ret1After = 'end; return 0;'
end
else
call err 'matchGenMat bad case' a'.'fy m.a.fy a'.'ty m.a.ty
end
if opt == 'v' & fx == 1 then do
if r <> '' then
r = 'm.vars.0 = -9;' r
ret1 = ret1 'm.vars.0 =' length(m.a.wildC)';'
end
r = r ret1 'return 1;' ret1After
return r
endProcedure matchGenMat
matchGenRep: procedure expose m.
parse arg o, wildC
xQ = 0
xS = 0
do ox=1 to m.o.0
if m.o.ox == '?' then do
xQ = pos('?', wildC, xQ+1)
if xQ < 1 then
call err 'unmatchted ?' ox
m.o.ox.re2 = xQ
end
else if m.o.ox == '*' then do
xS = pos('*', wildC, xS+1)
if xS < 1 then
call err 'unmatchted *' ox
m.o.ox.re2 = xS
end
else if m.o.ox == '&' & m.o.ox.ref >> '0' then do
if m.o.ox.ref > length(wildC) then
call err '&'m.o.ox.ref 'but wildcards' wildC
xQ = m.o.ox.ref
xS = xQ
m.o.ox.re2 = xQ
end
end
r = ''
do ox=1 to m.o.0
if abbrev(m.o.ox, 'c') then
r = r '||' quote(m.o.ox.val, "'")
else if m.o.ox == '&' & m.o.ox.re2 == 's' then
r = r '|| wert'
else if m.o.ox == '&' & m.o.ox.re2 == 'm' then
r = r '||' quote(mask, "'")
else if pos(m.o.ox, '*?&') > 0 then
r = r '|| m.vars.'m.o.ox.re2
end
if r=='' then
return "''"
else
return substr(r, 5)
endProcedure matchGenRep
/* copy match end ****************************************************/