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|
-- Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
-- All rights reserved.
-- Copyright (C) 2007-2009, 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 bits
import dq
import incl
namespace BOOT
module scan
--%
$RDigits ==
'"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
$smallLetters ==
'"abcdefghijklmnopqrstuvwxyz"
--% Separators
$SPACE == QENUM('" ", 0)
ESCAPE == QENUM('"__ ", 0)
STRING_CHAR == QENUM('"_" ", 0)
PLUSCOMMENT == QENUM('"+ ", 0)
MINUSCOMMENT == QENUM('"- ", 0)
RADIX_CHAR == QENUM('"r ", 0)
DOT == QENUM('". ", 0)
EXPONENT1 == QENUM('"E ", 0)
EXPONENT2 == QENUM('"e ", 0)
CLOSEPAREN == QENUM('") ", 0)
CLOSEANGLE == QENUM('"> ", 0)
QUESTION == QENUM('"? ",0)
--% Keywords
scanKeyWords == [ _
['"add", "ADD" ],_
['"and", "AND" ],_
['"assume","ASSUME" ],_
['"break", "BREAK" ],_
['"by", "BY" ],_
['"case", "CASE" ],_
['"default", "DEFAULT" ],_
['"define", "DEFN" ],_
['"do", "DO"],_
['"else", "ELSE" ],_
['"exist", "EXIST"],_
['"exit", "EXIT" ],_
['"export","EXPORT" ],_
['"forall", "FORALL"],_
['"for", "FOR" ],_
['"free", "FREE" ],_
['"from", "FROM" ],_
['"has", "HAS" ],_
['"if", "IF" ],_
['"import", "IMPORT" ],_
['"in", "IN" ],_
['"inline", "INLINE" ],_
['"is", "IS" ],_
['"isnt", "ISNT" ],_
['"iterate", "ITERATE"],_
['"local", "local" ],_
['"macro", "MACRO" ],_
['"mod", "MOD" ],_
['"or", "OR" ],_
['"pretend","PRETEND" ],_
['"quo","QUO" ],_
['"rem","REM" ],_
['"repeat","REPEAT" ],_
['"return","RETURN" ],_
['"rule","RULE" ],_
['"then","THEN" ],_
['"where","WHERE" ],_
['"while","WHILE" ],_
['"with","WITH" ],_
['"|","BAR"],_
['".","DOT" ],_
['"::","COERCE" ],_
['":","COLON" ],_
['":-","COLONDASH" ],_
['"@","AT" ],_
['",","COMMA" ],_
['";","SEMICOLON" ],_
['"**","POWER" ],_
['"*","TIMES" ],_
['"+","PLUS" ],_
['"-","MINUS" ],_
['"<","LT" ],_
['">","GT" ],_
['"<=","LE" ],_
['">=","GE" ],_
['"=", "EQUAL"],_
['"~=","NOTEQUAL" ],_
['"~","~" ],_
['"^","CARAT" ],_
['"..","SEG" ],_
['"#","#" ],_
['"&","AMPERSAND" ],_
['"$","$" ],_
['"/","SLASH" ],_
['"\","BACKSLASH" ],_
['"//","SLASHSLASH" ],_
['"\\","BACKSLASHBACKSLASH" ],_
['"/\","SLASHBACKSLASH" ],_
['"\/","BACKSLASHSLASH" ],_
['"=>","EXIT" ],_
['":=","BECOMES" ],_
['"==","DEF" ],_
['"==>","MDEF" ],_
['"->","ARROW" ],_
['"<-","LARROW" ],_
['"+->","GIVES" ],_
['"(","(" ],_
['")",")" ],_
['"(|","(|" ],_
['"|)","|)" ],_
['"[","[" ],_
['"]","]" ],_
['"[__]","[]" ],_
['"{","{" ],_
['"}","}" ],_
['"{__}","{}" ],_
['"[|","[|" ],_
['"|]","|]" ],_
['"[|__|]","[||]" ],_
['"{|","{|" ],_
['"|}","|}" ],_
['"{|__|}","{||}" ],_
['"<<","OANGLE" ],_
['">>","CANGLE" ],_
['"'", "'" ],_
['"`", "BACKQUOTE" ]_
]
scanKeyTableCons()==
KeyTable:=MAKE_-HASHTABLE("CVEC",true)
for st in scanKeyWords repeat
HPUT(KeyTable,CAR st,second st)
KeyTable
scanKeyTable:=scanKeyTableCons()
scanInsert(s,d) ==
l := #s
h := QENUM(s,0)
u := ELT(d,h)
n := #u
k:=0
while l <= #(ELT(u,k)) repeat
k:=k+1
v := MAKE_-VEC(n+1)
for i in 0..k-1 repeat VEC_-SETELT(v,i,ELT(u,i))
VEC_-SETELT(v,k,s)
for i in k..n-1 repeat VEC_-SETELT(v,i+1,ELT(u,i))
VEC_-SETELT(d,h,v)
s
scanDictCons()==
l:= HKEYS scanKeyTable
d :=
a:=MAKE_-VEC(256)
b:=MAKE_-VEC(1)
VEC_-SETELT(b,0,MAKE_-CVEC 0)
for i in 0..255 repeat VEC_-SETELT(a,i,b)
a
for s in l repeat scanInsert(s,d)
d
scanDict:=scanDictCons()
scanPunCons()==
listing := HKEYS scanKeyTable
a:=MAKE_-BVEC 256
-- SETSIZE(a,256)
for i in 0..255 repeat BVEC_-SETELT(a,i,0)
for k in listing repeat
if not startsId? k.0
then BVEC_-SETELT(a,QENUM(k,0),1)
a
scanPun:=scanPunCons()
--for i in ["COLON","MINUS"] repeat
-- MAKEPROP(i,'PREGENERIC,'TRUE)
for i in [ _
["EQUAL" ,"="], _
["TIMES" ,"*"], _
["HAS" ,"has"], _
["CASE" ,"case"], _
["REM" ,"rem"], _
["MOD" ,"mod"], _
["QUO" ,"quo"], _
["SLASH" ,"/"], _
["BACKSLASH","\"], _
["SLASHSLASH" ,"//"], _
["BACKSLASHBACKSLASH","\\"], _
["SLASHBACKSLASH" ,"/\"], _
["BACKSLASHSLASH","\/"], _
["POWER" ,"**"], _
["CARAT" ,"^"], _
["PLUS" ,"+"], _
["MINUS" ,"-"], _
["LT" ,"<"], _
["GT" ,">"], _
["OANGLE" ,"<<"], _
["CANGLE" ,">>"], _
["LE" ,"<="], _
["GE" ,">="], _
["NOTEQUAL" ,"~="], _
["BY" ,"by"], _
["ARROW" ,"->"], _
["LARROW" ,"<-"], _
["BAR" ,"|"], _
["SEG" ,".."] _
] repeat MAKEPROP(first i,'INFGENERIC,second i)
-- Scanner
-- lineoftoks bites off a token-dq from a line-stream
-- returning the token-dq and the rest of the line-stream
scanIgnoreLine(ln,n)==
if null n
then n
else
fst:=QENUM(ln,0)
if EQ(fst,CLOSEPAREN)
then if incPrefix?('"command",1,ln)
then true
else nil
else n
nextline(s)==
if npNull s
then false
else
$f:= first s
$r:= rest s
$ln := rest $f
$linepos:=CAAR $f
$n:=STRPOSL('" ",$ln,0,true)-- spaces at beginning
$sz :=# $ln
true
lineoftoks(s)==
$f: local:=nil
$r:local :=nil
$ln:local :=nil
$linepos:local:=nil
$n:local:=nil
$sz:local := nil
$floatok:local:=true
if not nextline s
then CONS(nil,nil)
else
if null scanIgnoreLine($ln,$n) -- line of spaces or starts ) or >
then cons(nil,$r)
else
toks:=[]
a:= incPrefix?('"command",1,$ln)
a =>
$ln:=SUBSTRING($ln,8,nil)
b:= dqUnit constoken($ln,$linepos,["command",$ln],0)
cons([[b,s]],$r)
while $n<$sz repeat toks:=dqAppend(toks,scanToken())
if null toks
then cons([],$r)
else cons([[toks,s]],$r)
scanToken() ==
ln:=$ln
c:=QENUM($ln,$n)
linepos:=$linepos
n:=$n
ch:=$ln.$n
b:=
startsComment?() =>
scanComment()
[]
startsNegComment?() =>
scanNegComment()
[]
c= QUESTION =>
$n:=$n+1
lfid '"?"
punctuation? c => scanPunct ()
startsId? ch => scanWord (false)
c=$SPACE =>
scanSpace ()
[]
c = STRING_CHAR => scanString ()
digit? ch => scanNumber ()
c=ESCAPE => scanEscape()
scanError ()
null b => nil
dqUnit constoken(ln,linepos,b,n+lnExtraBlanks linepos)
-- to pair badge and badgee
-- lfid x== ["id",INTERN x]
lfid x== ["id",INTERN(x, '"BOOT")]
lfkey x==["key",keyword x]
lfinteger x==
["integer",x]
-- if EQUAL(x,'"0")
-- then ["id",INTERN x]
-- else if EQUAL(x,'"1")
-- then ["id",INTERN x]
-- else ["integer",x]
lfrinteger (r,x)==["integer",CONCAT (r,CONCAT('"r",x))]
--lfrfloat(a,w,v)==["rfloat",CONCAT(a,'"r.",v)]
lffloat(a,w,e)==["float",CONCAT(a,'".",w,'"e",e)]
lfstring x==if #x=1 then ["char",x] else ["string",x]
lfcomment x== ["comment", x]
lfnegcomment x== ["negcomment", x]
lferror x==["error",x]
lfspaces x==["spaces",x]
constoken(ln,lp,b,n)==
-- [b.0,b.1,cons(lp,n)]
a:=cons(b.0,b.1)
ncPutQ(a,"posn",cons(lp,n))
a
scanEscape()==
$n:=$n+1
a:=scanEsc()
if a then scanWord true else nil
scanEsc()==
if $n>=$sz
then if nextline($r)
then
while null $n repeat nextline($r)
scanEsc()
false
else false
else
n1:=STRPOSL('" ",$ln,$n,true)
if null n1
then if nextline($r)
then
while null $n repeat nextline($r)
scanEsc()
false
else false
else
if $n=n1
then true
else if QENUM($ln,n1)=ESCAPE
then
$n:=n1+1
scanEsc()
false
else
$n:=n1
startsNegComment?() or startsComment?() =>
nextline($r)
scanEsc()
false
false
startsComment?()==
if $n<$sz
then
if QENUM($ln,$n)=PLUSCOMMENT
then
www:=$n+1
if www>=$sz
then false
else QENUM($ln,www) = PLUSCOMMENT
else false
else false
startsNegComment?()==
if $n< $sz
then
if QENUM($ln,$n)=MINUSCOMMENT
then
www:=$n+1
if www>=$sz
then false
else QENUM($ln,www) = MINUSCOMMENT
else false
else false
scanNegComment()==
n:=$n
$n:=$sz
lfnegcomment SUBSTRING($ln,n,nil)
scanComment()==
n:=$n
$n:=$sz
lfcomment SUBSTRING($ln,n,nil)
scanPunct()==
sss:=subMatch($ln,$n)
a:= # sss
if a=0
then
scanError()
else
$n:=$n+a
scanKeyTr sss
scanKeyTr w==
if keyword w = "DOT"
then if $floatok
then scanPossFloat(w)
else lfkey w
else
$floatok:=not scanCloser? w
lfkey w
scanPossFloat (w)==
if $n>=$sz or not digit? $ln.$n
then lfkey w
else
w:=spleI(function digit?)
scanExponent('"0",w)
scanCloser == [")","}","]","|)","|}","|]"]
scanCloser? w== MEMQ(keyword w,scanCloser)
scanSpace()==
n:=$n
$n:=STRPOSL('" ",$ln,$n,true)
if null $n then $n:=# $ln
$floatok:=true
lfspaces ($n-n)
scanString()==
$n:=$n+1
$floatok:=false
lfstring scanS ()
scanS()==
if $n>=$sz
then
ncSoftError(cons($linepos,lnExtraBlanks $linepos+$n),"S2CN0001",[])
'""
else
n:=$n
strsym :=STRPOS ('"_"",$ln,$n,nil) or $sz
escsym:=STRPOS ('"__"
,$ln,$n,nil) or $sz
mn:=MIN(strsym,escsym)
if mn=$sz
then
$n:=$sz
ncSoftError(cons($linepos,lnExtraBlanks $linepos+$n),
"S2CN0001",[])
SUBSTRING($ln,n,nil)
else if mn=strsym
then
$n:=mn+1
SUBSTRING($ln,n,mn-n)
else --escape is found first
str:=SUBSTRING($ln,n,mn-n)-- before escape
$n:=mn+1
a:=scanEsc() -- case of end of line when false
b:=if a
then
str:=CONCAT(str,scanTransform($ln.$n))
$n:=$n+1
scanS()
else scanS()
CONCAT(str,b)
scanTransform x==x
--idChar? x== scanLetter x or DIGITP x or x in '(_? _%)
--scanLetter x==
-- if not CHARP x
-- then false
-- else STRPOSL(scanTrTable,x,0,NIL)
posend(line,n)==
while n<#line and idChar? line.n repeat n:=n+1
n
--numend(line,n)==
-- while n<#line and digit? line.n repeat n:=n+1
-- n
--startsId? x== scanLetter x or x in '(_? _%)
digit? x== DIGITP x
scanW(b)== -- starts pointing to first char
n1:=$n -- store starting character position
$n:=$n+1 -- the first character is not tested
l:=$sz
endid:=posend($ln,$n)
if endid=l or QENUM($ln,endid) ~= ESCAPE
then -- not escaped
$n:=endid
[b,SUBSTRING($ln,n1,endid-n1)] -- l overflows
else -- escape and endid ~= l
str:=SUBSTRING($ln,n1,endid-n1)
$n:=endid+1
a:=scanEsc()
bb:=if a -- escape nonspace
then scanW(true)
else
if $n>=$sz
then [b,'""]
else
if idChar?($ln.$n)
then scanW(b)
else [b,'""]
[bb.0 or b,CONCAT(str,bb.1)]
scanWord(esp) ==
aaa:=scanW(false)
w:=aaa.1
$floatok:=false
if esp or aaa.0
then lfid w
else if keyword? w
then
$floatok:=true
lfkey w
else lfid w
spleI(dig)==spleI1(dig,false)
spleI1(dig,zro) ==
n:=$n
l:= $sz
while $n<l and FUNCALL(dig,($ln.$n)) repeat $n:=$n+1
if $n=l or QENUM($ln,$n) ~= ESCAPE
then if n=$n and zro
then '"0"
else SUBSTRING($ln,n,$n-n)
else -- escaped
str:=SUBSTRING($ln,n,$n-n)
$n:=$n+1
a:=scanEsc()
bb:=spleI1(dig,zro)-- escape, anyno spaces are ignored
CONCAT(str,bb)
scanCheckRadix(a,w)==
r := PARSE_-INTEGER a
ns:=#w
ns = 0 =>
ncSoftError([$linepos,:lnExtraBlanks $linepos+$n],"S2CN0004",[a])
done:=false
for i in 0..ns-1 repeat
a:=rdigit? w.i
if null a or a>=r
then ncSoftError(cons($linepos,lnExtraBlanks $linepos+$n-ns+i),
"S2CN0002", [w.i])
scanNumber() ==
a := spleI(function digit?)
if $n>=$sz
then lfinteger a
else
if QENUM($ln,$n) ~= RADIX_CHAR
then
if $floatok and QENUM($ln,$n)=DOT
then
n:=$n
$n:=$n+1
if $n<$sz and QENUM($ln,$n)=DOT
then
$n:=n
lfinteger a
else
w:=spleI1(function digit?,true)
scanExponent(a,w)
else lfinteger a
else
$n:=$n+1
w:=spleI1(function rdigit?,false)
scanCheckRadix(a,w)
if $n>=$sz
then
lfrinteger(a,w)
else if QENUM($ln,$n)=DOT
then
n:=$n
$n:=$n+1
if $n<$sz and QENUM($ln,$n)=DOT
then
$n:=n
lfrinteger(a,w)
else
--$n:=$n+1
v:=spleI1(function rdigit?,true)
scanCheckRadix(a,v)
scanExponent(CONCAT(a,'"r",w),v)
else lfrinteger(a,w)
scanExponent(a,w)==
if $n>=$sz
then lffloat(a,w,'"0")
else
n:=$n
c:=QENUM($ln,$n)
if c=EXPONENT1 or c=EXPONENT2
then
$n:=$n+1
if $n>=$sz
then
$n:=n
lffloat(a,w,'"0")
else if digit?($ln.$n)
then
e:=spleI(function digit?)
lffloat(a,w,e)
else
c1:=QENUM($ln,$n)
if c1=PLUSCOMMENT or c1=MINUSCOMMENT
then
$n:=$n+1
if $n>=$sz
then
$n:=n
lffloat(a,w,'"0")
else
if digit?($ln.$n)
then
e:=spleI(function digit?)
lffloat(a,w,
(if c1=MINUSCOMMENT then CONCAT('"-",e)else e))
else
$n:=n
lffloat(a,w,'"0")
else lffloat(a,w,'"0")
rdigit? x==
d := STRPOS(x,$RDigits,0,nil) => d
d := STRPOS(x,$smallLetters,0,nil) => 10 + d
nil
scanError()==
n:=$n
$n:=$n+1
ncSoftError(cons($linepos,lnExtraBlanks $linepos+$n),
"S2CN0003",[$ln.n])
lferror ($ln.n)
keyword st == HGET(scanKeyTable,st)
keyword? st == not null HGET(scanKeyTable,st)
subMatch(l,i)==substringMatch(l,scanDict,i)
substringMatch (l,d,i)==
h:= QENUM(l, i)
u:=ELT(d,h)
ll:=SIZE l
done:=false
s1:='""
for j in 0.. SIZE u - 1 while not done repeat
s:=ELT(u,j)
ls:=SIZE s
done:=if ls+i > ll
then false
else
eql:= true
for k in 1..ls-1 while eql repeat
eql:= EQL(QENUM(s,k),QENUM(l,k+i))
if eql
then
s1:=s
true
else false
s1
punctuation? c== scanPun.c=1
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