NEW
  AUTO 3,1
*--------------------------------------
CORE.Init		lda #SL._
				>SYSCALL SListNew
				bcs .9

				>STA.G CC.hDefines

				lda #SL._
				>SYSCALL SListNew
				bcs .9

				>STA.G CC.hTags

				lda #SL._
				>SYSCALL SListNew
				bcs .9

				>STA.G CC.hSyms

				>LDYAI 256
				>SYSCALL GetMem
				bcs .9

				>STYA ZPSymBufPtr
				txa
				>STA.G CC.hSymBuf

				>LDYAI 256
				>SYSCALL GetMem
				bcs .9

				>STYA ScopeStk
				txa
				>STA.G CC.hScopeStk

				>LDYAI 256
				>SYSCALL GetMem
				bcs .9

				>STYA StmtStk
				txa
				>STA.G CC.hStmtStk

				lda #'_'
				>STA.G CC.Label

				lda #CC.LookupIdx
				tay
				sta (pData),y

*				clc
.9				rts
*--------------------------------------
CORE.Quit		jsr FIO.FClose
				bne CORE.Quit

				>LDA.G CC.hSyms
				beq .1

				>SYSCALL SListFree

.1				>LDA.G CC.hTags
				beq .2

				>SYSCALL SListFree

.2				>LDA.G CC.hDefines
				beq .4

				>SYSCALL SListFree

.4				>LDA.G CC.hDefineBuf
				jsr .7

				>LDA.G CC.hSymBuf
				jsr .7

.5				jsr SYM.LookupFree
				bcc .5

				>LDA.G CC.hScopeStk
				jsr .7

				>LDA.G CC.hStmtStk

.7				beq .8

				>SYSCALL FreeMem

.8				rts
*--------------------------------------
CORE.CompileFile
				>SLEEP

				ldy #S.PS.hStdIn
				lda (pPS),y
				>SYSCALL FEOF
				bcs .9

				tay
				bne .1

				>SYSCALL GetChar
				bcs .9					I/O err

				cmp #3					Ctrl-C
				beq .9

.1				jsr FIO.FGetS
				bcs .9

				jsr CORE.CompileLine
				bcc CORE.CompileFile

.9				rts
*--------------------------------------
CORE.CompileLine
				jsr CC.GetCharNB
				bcs .99

				cmp #C.CR				EOL....
				beq .8

				cmp #'#'				directive ?
				bne .1

				jmp DIR

.1				tax
				
				>LDA.G CC.DirState		FALSE state
				bmi .8

				txa

				cmp #'/'
				bne .2					comments ...

				jmp CORE.Comments
*--------------------------------------
.2				cmp #'}'				End of CPStmt ?
				beq .5

				jsr CORE.CompileStmt
				bcs .99

				jsr CC.GetCharNB
				bcs .98

				cmp #'{'
				bne .3

				jsr CORE.GetNCharNBNL	Skip '{'
				bcc CORE.CompileLine

.3				cmp #';'				End of Stmt ?
				bne .4

				jsr CORE.GetNCharNBNL	Skip ';'

				jsr STMT.Stmt.END
				bcs .99

				jsr CC.GetCharNB

.4				cmp #'}'				End of CPStmt ?
				bne CORE.CompileLine

.5				jsr CORE.GetNCharNBNL	Skip '}'

				jsr STMT.CPStmt.END
				bcs .99
			
				jsr CC.GetCharNB
				bcc .3

.98				lda #E.CSYN
				sec
.99				rts

.8				clc
				rts
*--------------------------------------
* keyword : for, while ....
*--------------------------------------
CORE.CompileStmt
				>LDYA L.CC.KW
				jsr CC.LookupID
				bcs .1					not an internal CC keyword....

				txa
				>STA.G CC.CmdSave
				jmp (J.CC.KW,x)
*--------------------------------------
* Declaration : typedef, type var or type func()
*--------------------------------------
.1				>LDYA L.CC.SCSPEC
				jsr CC.LookupID
				bcs .2

				jmp (J.CC.SCSPEC,x)

.2				>LDYA L.CC.TYPEQUAL
				jsr CC.LookupID
				bcs .3

				jmp DECL.X
*--------------------------------------
* Statement : ++var, var=, func();
*--------------------------------------
.3				jmp STMT.Get
*--------------------------------------
.99				lda #E.CSYN
				sec
.9				rts
*--------------------------------------
CORE.Comments	jsr CC.GetNextChar

				cmp #'/'
				beq .8					// skip line.....
				
				cmp #'*'
				bne .9					/* ....  
				
.1 				jsr CORE.GetNCharNBNL
				bcs .9
				
				cmp #'*'				....*/
				bne .1

				jsr CC.GetNextChar
				bcs .9

				cmp #'/'
				bne .1
				
				jmp CC.GetNextChar
				
.8				clc
				rts

.9				lda #E.CSYN
				sec
				rts
*--------------------------------------
CORE.SkipLine	jsr CC.GetNextChar
				bcs .9

				cmp #C.CR
				bne CORE.SkipLine

				clc

.9				rts
*--------------------------------------
CC.LookupID		>STYA ZPLookupPtr
				jsr CC.GetIDLen
				bra CC.Lookup

CC.LookupAOP	>LDYA L.CC.AOPS
				>STYA ZPLookupPtr

				ldy #$ff

.1				iny
				lda (ZPLineBufPtr),y
				sec
				beq .9

				jsr CC.IsOPChar
				bcs .9

				cmp #'='
				bne .1

				iny

.8				tya
				bra CC.Lookup

.9				rts

CC.LookupOP		>STYA ZPLookupPtr
				jsr CC.GetOPLen

CC.Lookup		phy						Y = len
				ldx #0

.1				lda (ZPLookupPtr)
				beq .9					Ending 0, not found....

				pla
				pha						Get Back Len
				cmp (ZPLookupPtr)		Same Len ?
				bne .4

				tay
.2				lda (ZPLookupPtr),y

.3				dey
				cmp (ZPLineBufPtr),y
				bne .4

				tya
				bne .2

				pla						Found keyword...
				jsr CC.SkipA			..advance Ptr to char after it..

				lda ZPLookupPtr
				sec
				adc (ZPLookupPtr)
				tay
				lda ZPLookupPtr+1
				adc #0
				clc						Y,A = F() def, X = F() index
				rts

.4				inx
				inx
				lda (ZPLookupPtr)
				jsr CC.ZPLookupPtrAddAp1
				bra .1

.9				ldx #$FF
				pla
				sec
				rts
*--------------------------------------
CC.ZPLookupPtrAddAp1
				sec
				adc ZPLookupPtr
				sta ZPLookupPtr
				bcc .1

				inc ZPLookupPtr+1
.1				rts
*--------------------------------------
CC.GetDefine	>LDA.G CC.hDefines
				jsr CC.SListLookup
				bcs .9

				>LDYA ZPLineBufPtr
				>STYA.G CC.SaveDefine

				txa
				>STA.G CC.hDefineBuf

				>SYSCALL GetMemPtr
				>STYA ZPLineBufPtr

.9				rts
*--------------------------------------
CC.SListLookup	>PUSHA					hSList
				>PUSHA					...for SListGetData
				>PUSHW ZPLineBufPtr
				>PUSHWI 0				ScopeID
				>SYSCALL SListLookup
				bcs .99

				>PUSHA					KeyID.HI
				tya
				>PUSHA					KeyID.LO

				jsr CC.SkipX

				>PUSHWZ					allocate
				>PUSHWI 65535			all
				>PUSHWZ					From Start
				>SYSCALL SListGetData

.9				rts						Y,A = SymSize, X = hSymBuf

.99				inc pStack				discard extra hSList
				rts
*--------------------------------------
* CT Stack
*--------------------------------------
CC.Push			ldy StmtPtr
				dey
				beq .9

				sty StmtPtr

				sta (StmtStk),y
				clc
				rts

.9				lda #E.STKOVERFLOW
				sec
				rts
*--------------------------------------
* ZPLineBufPtr related Subs.....
*--------------------------------------
CC.SkipX		txa
CC.SkipA		clc
				adc ZPLineBufPtr
				sta ZPLineBufPtr
				bcc .8

				inc ZPLineBufPtr+1

.8				rts
*--------------------------------------
CC.GetOPLen		ldy #0

.1				iny
				lda (ZPLineBufPtr),y
				beq .8

				jsr CC.IsOPChar
				bcc .1

.8				tya
				rts
*--------------------------------------
CC.GetIDLen		ldy #0

.1				iny
				lda (ZPLineBufPtr),y
				beq .8

				jsr CC.IsLetterOrDigit
				bcc .1

.8				tya
				rts
*--------------------------------------
CC.GetCharNB	jsr CC.GetChar
				bcs CORE.GetNCharNB.RTS

				jsr CC.CheckCharNB
				bcc CORE.GetNCharNB.RTS
*--------------------------------------
CORE.GetNCharNB	jsr CC.GetNextChar
				bcs CORE.GetNCharNB.RTS

				jsr CC.CheckCharNB
				bcs CORE.GetNCharNB

CORE.GetNCharNB.RTS
				rts
*--------------------------------------
CORE.GetCharNBNL
				jsr CC.GetChar
				bcs CORE.GetNCharNB.RTS

				jsr CC.CheckCharNB
				bcs CORE.GetNCharNBNL

				cmp #C.CR
				clc
				bne CORE.GetNCharNB.RTS

				jsr FIO.FGetS
				bcc CORE.GetCharNBNL

				rts
*--------------------------------------
CORE.GetNCharNBNL
				jsr CC.GetChar
				bcs .9

				cmp #C.CR
				beq .1

				jsr CORE.GetNCharNB
				bcs .9

				cmp #C.CR
				clc
				bne .9

.1				jsr FIO.FGetS
				bcc CORE.GetCharNBNL

.9				rts
*--------------------------------------
CC.CheckSpace	jsr CC.GetChar
				bcs .90

				cmp #C.SPACE
				bne .90

				jsr CORE.GetNCharNB
				bcc .99

.90				lda #E.CSYN
				sec
.99				rts
*--------------------------------------
CC.CheckCharNB	cmp #C.SPACE
				beq .9

				cmp #C.TAB
				beq .9

				clc
.9				rts
*--------------------------------------
* https://riptutorial.com/c/example/16255/character-literals
* 'c', '\abefnrtv', '\123', '\xFF'
*--------------------------------------
CC.GetNextCharEsc
				jsr CC.GetNextChar
				bcs .9

				cmp #'\'
				bne .8

				jsr CC.GetNextChar
				bcs .8

				ldx #CC.EscChars.Cnt-1

.1				cmp CC.EscChars,x
				beq .6

				dex
				bpl .1

* TODO : \123, \xFF

				sec
				rts

.6				lda CC.EscCodes,x
				bit .9
				clc
				rts

.8				clc
				clv
.9				rts
*--------------------------------------
CC.GetNextChar	inc ZPLineBufPtr
				bne CC.GetChar

				inc ZPLineBufPtr+1
*--------------------------------------
CC.GetChar		lda (ZPLineBufPtr)
				bne .8

				phy

				>LDA.G CC.hDefineBuf
				beq .1

				phx

				>SYSCALL FreeMem

				>STZ.G CC.hDefineBuf

				>LDYA.G CC.SaveDefine
				>STYA ZPLineBufPtr

				plx
				ply
				bra CC.GetChar

.1				ply
				lda #C.CR

.8				clc
				rts
*---------------------------------------
CC.IsEndArg		cmp #']'
				beq .8

				cmp #','
				beq .8

				cmp #';'
				beq .8

				cmp #':'
				beq .8

				cmp #')'
				beq .8

				sec
				rts

.8				clc
				rts
*---------------------------------------
CC.IsOPChar		ldx #CC.OPChars.Cnt-1

.1				cmp CC.OPChars,x
				beq .8

				dex
				bpl .1

				sec
				rts

.8				clc
				rts
*---------------------------------------
CC.IsLetterOrDigit
				jsr CC.IsDigit10
				bcc CC.IsLetterRTS
*---------------------------------------
CC.IsLetter		cmp #'_'
				bne .1

				clc
				rts

.1				cmp #'A'
				bcc .9

				cmp #'Z'+1
				bcc CC.IsLetterRTS

				cmp #'a'
				bcc .9

				cmp #'z'+1

				rts						CC if lowercase

.9				sec
CC.IsLetterRTS	rts
*---------------------------------------
CC.IsDigit10	cmp #'0'
				bcc .9

				cmp #'9'+1
				rts						cc if ok, cs if not

.9				sec
				rts
*--------------------------------------
MAN
SAVE usr/src/bin/cc.s.core
LOAD usr/src/bin/cc.s
ASM