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-- Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
-- All rights reserved.
-- Copyright (C) 2007-2012, Gabriel Dos Reis.
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are
-- met:
--
-- - Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
--
-- - Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in
-- the documentation and/or other materials provided with the
-- distribution.
--
-- - Neither the name of The Numerical ALgorithms Group Ltd. nor the
-- names of its contributors may be used to endorse or promote products
-- derived from this software without specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import sys_-macros
namespace BOOT
$wildCard := char "*"
maskMatch?(mask,subject) ==
null mask => true
if not string? subject then subject := PNAME subject
or/[match?(pattern,subject) for pattern in mask]
substring?(part, whole, startpos) ==
--This function should be replaced by STRING<
np := # part
nw := # whole
np > nw - startpos => false
and/[CHAR_-EQUAL(part.ip, whole.iw)
for ip in 0..np-1 for iw in startpos.. ]
anySubstring?(part,whole,startpos) ==
np := # part
nw := # whole
or/[((k := i) and "and"/[CHAR_-EQUAL(part.ip,whole.iw)
for ip in 0..np - 1 for iw in i..]) for i in startpos..nw - np] => k
rightCharPosition(c,t,startpos) == --startpos often equals maxIndex t (rightmost)
k := startpos
for i in startpos..0 by -1 while c ~= stringChar(t,i) repeat (k := k - 1)
k
stringPosition(s,t,startpos) ==
n := # t
if startpos < 0 or startpos > n then error '"index out of range"
if # s = 0 then return startpos
r := findString(s,t,startpos)
if r = nil then n else r
superMatch?(opattern,subject) == --subject assumed to be DOWNCASEd
$wildCard : local := char "*"
pattern := patternCheck opattern
logicalMatch?(pattern,subject)
logicalMatch?(pattern,subject) == --subject assumed to be DOWNCASEd
pattern is [op,:argl] =>
op = "and" => and/[superMatch?(p,subject) for p in argl]
op = "or" => or/[superMatch?(p,subject) for p in argl]
op = "not" => not superMatch?(first argl,subject)
systemError '"unknown pattern form"
basicMatch?(pattern,subject)
patternCheck pattern == main where
--checks for escape characters, maybe new $wildCard
main() ==
-- pattern := pmTransFilter pattern --should no longer need this (rdj:10/1/91)
u := pos(char "__",pattern)
null u => pattern
not(and/[equal(pattern,i + 1,$wildCard) for i in u]) =>
sayBrightly ['"Invalid use of underscores in pattern: ",pattern]
'"!!!!!!!!!!!!!!"
c := wild(pattern,'($ _# % _& _@))
-- sayBrightlyNT ['"Choosing new wild card"]
-- pp c
$oldWild :local := $wildCard
$wildCard := c
pattern := mknew(pattern,first u,rest u,subString(pattern,0,first u))
-- sayBrightlyNT ['"Replacing pattern by"]
-- pp pattern
pattern
mknew(old,i,r,new) ==
new := strconc(new,old.(i + 1)) --add underscored character to string
null r => strconc(new,subWild(subString(old,i + 2),0))
mknew(old,first r,rest r,
strconc(new,subWild(subString(old,i + 2,(first r) - i - 1),i + 1)))
subWild(s,i) ==
(k := charPosition($oldWild,s,i)) < #s =>
strconc(subString(s,i,k - i),$wildCard,subWild(s,k + 1))
subString(s,i)
pos(c,s) ==
i := 0
n := maxIndex s
acc := nil
repeat
k := charPosition(c,s,i)
k > n => return reverse! acc
acc := [k,:acc]
i := k + 1
equal(p,n,c) ==
n > maxIndex p => false
p.n = c
wild(p,u) ==
for id in u repeat
c := char id
not(or/[p.i = c for i in 0..maxIndex(p)]) => return c
match?(pattern,subject) == --returns index of first character that matches
basicMatch?(pattern,DOWNCASE subject)
stringMatch(pattern,subject,wildcard) ==
not CHARP wildcard =>
systemError '"Wildcard must be a character"
$wildCard : local := wildcard
subject := DOWNCASE subject
k := basicMatch?(pattern,DOWNCASE subject) => k + 1
0
basicMatch?(pattern,target) ==
n := #pattern
p := charPosition($wildCard,pattern,0)
p = n => (pattern = target) and 0
if p ~= 0 then
-- pattern does not begin with a wild card
ans := 0
s := subString(pattern,0,p) --[pattern.i for i in 0..p-1]
not substring?(s,target,0) => return false
else if n = 1 then return 0
i := p -- starting position for searching the target
q := charPosition($wildCard,pattern,p+1)
ltarget := #target
while q ~= n repeat
s := subString(pattern,p+1,q-p-1) --[pattern.i for i in (p+1..q-1)]
i := stringPosition(s,target,i)
if null ans then ans := stringPosition(s,target,p)
-- for patterns beginning with wildcard, ans gives position of first match
if i = ltarget then return (returnFlag := true)
i := i + #s
p := q
q := charPosition($wildCard,pattern,q+1)
returnFlag => false
if p ~= q-1 then
-- pattern does not end with a wildcard
s := subString(pattern,p+1,q-p-1) --[pattern.i for i in (p+1..q-1)]
if not suffix?(s,target) then return false
if null ans then ans := 1 --pattern is a word preceded by a *
ans
matchSegment?(pattern,subject,k) ==
matchAnySegment?(pattern,DOWNCASE subject,k,nil)
matchAnySegment?(pattern,target,k,nc) == --k = start position; nc=#chars or nil
n := #pattern
p := charPosition($wildCard,pattern,0)
p = n =>
m := stringPosition(pattern,target,k)
m = #target => nil
null nc => true
m <= k + nc - n
if k ~= 0 and nc then
target := subString(target,k,nc)
k := 0
if p ~= 0 then
-- pattern does not begin with a wild card
ans := 0
s := subString(pattern,0,p) --[pattern.i for i in 0..p-1]
not substring?(s,target,k) => return false
else if n = 1 then return true
i := p + k -- starting position for searching the target
q := charPosition($wildCard,pattern,p+1)
ltarget := #target
while q ~= n repeat
s := subString(pattern,p+1,q-p-1) --[pattern.i for i in (p+1..q-1)]
i := stringPosition(s,target,i)
if i = ltarget then return (returnFlag := true)
i := i + #s
p := q
q := charPosition($wildCard,pattern,q+1)
returnFlag => false
if p ~= q-1 then
-- pattern does not end with a '&
s := subString(pattern,p+1,q-p-1) --[pattern.i for i in (p+1..q-1)]
if not suffix?(s,target) then return false
if null ans then ans := 1 --pattern is a word preceded by a *
true
infix?(s,t,x) == #s + #t >= #x and prefix?(s,x) and suffix?(t,x)
prefix?(s,t) == substring?(s,t,0)
suffix?(s,t) ==
m := #s; n := #t
if m > n then return false
substring?(s,t,(n-m))
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