mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-22 16:31:07 +00:00
490 lines
7.7 KiB
Plaintext
490 lines
7.7 KiB
Plaintext
NEW
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AUTO 3,1
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.LIST OFF
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*--------------------------------------
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* Input:
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* ZPInputBufPtr, Y,A = Expected type/qual
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* Output:
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* CS, A = EC
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* CC, Y,A = type/qual, Value on Stack
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*--------------------------------------
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CSH.ExpEval ldx ZPPtr1
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phx
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ldx ZPPtr1+1 local : used by lookup
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phx
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ldx ZPPtr2 local : VarType
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phx
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ldx ZPPtr2+1 local : VarQual
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phx
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ldx ZPPtr3 local : BOP
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phx
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>STYA ZPPtr2 local : expected type/qual
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lda #$ff no previous OP
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pha
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*--------------------------------------
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.10 jsr CSH.GetCharNB
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bcs .19
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.11 cmp #'('
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bne .20
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jsr CSH.GetNextCharNB skip (
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bcs .19
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>LDYA ZPPtr2
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jsr CSH.ExpEval
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bcs .19
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>STYA ZPPtr2 update type/qual
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jsr CSH.GetCharNB
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bcs .19
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cmp #')'
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bne .19
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jsr CSH.GetNextCharNB skip )
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bcc .31
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.19 jmp .90
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*--------------------------------------
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.20 jsr CSH.IsLetter define, Fnc or Var ?
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bcs .22
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jsr CSH.GetDefine
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bcc .10
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jsr CSH.VarLookup
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bcs .21
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jsr CSH.GetValue Check type & Get value on stack
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bcs .29
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bra .30
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.21 >LDYA ZPPtr2 var type/qual
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jsr CSH.fCall X = function index
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bcs .29
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>STYA ZPPtr2 store real var type
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bra .30
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*--------------------------------------
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.22 jsr CSH.IsDigit10 number ?
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bcs .24
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ldy ZPPtr2
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bne .23
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ldy #CSH.T.SINT
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sty ZPPtr2
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stz ZPPtr2+1
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.23 jsr CSH.GetNumOnStack
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bcs .29
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bra .30
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.24 cmp #'"' String literal
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bne .90
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jsr CSH.AddContCharP
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.29 bcs .99
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*--------------------------------------
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.30 jsr CSH.GetCharNB
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bcs .90
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.31 cmp #';'
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beq .80
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cmp #','
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beq .80
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cmp #')'
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beq .80
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jsr CSH.IsOPChar
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bcs .90
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>LDYA L.CSH.BOPS we are at V1 op1 V2 op2...
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jsr CSH.LookupOP
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bcs .90
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stx ZPPtr3 save OP(n)
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.32 plx get OP(n-1)
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bmi .33 $ff....
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cpx ZPPtr3
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bcc .33 OP(n) has precedence, on stack : V1,V2
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>LDYA ZPPtr2 OP(n-1) has precedence...
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jsr CSH.BOP.EXEC compute V(n-1) <OP(n-1)> V(n)
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bcc .32
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bcs .99
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.33 phx push back OP(n-1)
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lda ZPPtr3 get OP(n)
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pha push OP(n) on stack
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jmp .10 go check for next token
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*--------------------------------------
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.80 plx any OP on stack ?
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bmi .88
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>LDYA ZPPtr2 Var Type
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jsr CSH.BOP.EXEC
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bcc .80
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bcs .99
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.90 lda #E.ESYN
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.99 plx
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bpl .99
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sec
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bra .89
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.88 clc
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>LDYA ZPPtr2 Type/Qual
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.89 plx
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stx ZPPtr3
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plx
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stx ZPPtr2+1
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plx
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stx ZPPtr2
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plx
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stx ZPPtr1+1
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plx
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stx ZPPtr1
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rts
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*--------------------------------------
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CSH.AddContCharP
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ldy #0
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.1 jsr CSH.GetNextChar
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bcs .9
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cmp #C.CR
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beq .9
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cmp #'"'
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beq .2
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sta (ZPCSHConst),y
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iny
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bra .1
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.2 lda #0
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sta (ZPCSHConst),y
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>PUSHW ZPCSHConst Push PTR on stack
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tya
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sec
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adc ZPCSHConst
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sta ZPCSHConst
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bcc .3
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inc ZPCSHConst+1
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.3 jsr CSH.GetNextChar Skip "
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clc
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rts
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.9 lda #E.ESYN
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sec
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rts
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*--------------------------------------
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CSH.GetNumOnStack
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cpy #CSH.T.FLOAT
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bcc .1
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bne .99
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>PUSHW ZPInputBufPtr
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>PUSHWI ZPInputBufPtr
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>SYSCALL StrToF
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clc
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rts
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.1 >PUSHW ZPInputBufPtr
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>PUSHWI ZPInputBufPtr
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>PUSHBI 10
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bcc .2
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>SYSCALL StrToUL
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bra .3
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.2 >SYSCALL StrToL
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.3 bcs .9
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ldy ZPPtr2
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lda CSH.TYPESIZE-1,y
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cmp #4
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beq .8
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cmp #2
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bne .4
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ldy #1
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>PULLA
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sta (pStack),y
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>PULLA
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sta (pStack),y
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clc
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rts
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.4 >PULLA
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inc pStack
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inc pStack
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sta (pStack)
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.8 clc
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.9 rts
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.99 lda #E.TMISMATCH
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sec
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rts
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*--------------------------------------
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CSH.VarLookup >PUSHB.G CSH.hSymbols
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>PUSHW ZPInputBufPtr
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>SYSCALL SListLookup
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bcs .9
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phy
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pha
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txa
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* clc
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adc ZPInputBufPtr
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sta ZPInputBufPtr
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bcc .1
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inc ZPInputBufPtr+1
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clc
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.1 >PUSHB.G CSH.hSymbols
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pla
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>PUSHA
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pla
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>PUSHA KeyID
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>PUSHEA.G CSH.VarDef
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>PUSHWI 8 8 bytes
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>PUSHWI 0 From Start
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>SYSCALL SListGetData
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.9 rts
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*--------------------------------------
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CSH.GetValue lda ZPPtr2 target type
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beq .1
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>LDA.G CSH.VarDef Type
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cmp #CSH.T.VOID
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beq .11
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cmp ZPPtr2
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bne .9
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.11 lda ZPPtr2+1 qual
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>CMP.G CSH.VarDef+1
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beq .2
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.9 lda #E.TMISMATCH
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sec
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rts
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.1 >LDA.G CSH.VarDef Type
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sta ZPPtr2
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iny
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lda (pData),y
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sta ZPPtr2+1
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.2 lda ZPPtr3
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pha
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lda ZPPtr3+1
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pha
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>LDA.G CSH.VarDef+4
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sta ZPPtr3
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iny
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lda (pData),y
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sta ZPPtr3+1
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ldx ZPPtr2
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ldy CSH.TYPESIZE-1,x
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.3 dey
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lda (ZPPtr3),y
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>PUSHA
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tya
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bne .3
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pla
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sta ZPPtr3+1
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pla
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sta ZPPtr3
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clc
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rts
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*--------------------------------------
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* Input:
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* ZPInputBufPtr, Y,A = Expected type/qual
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* Output:
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* CS, A = EC
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* CC, Y,A = type/qual, Result on Stack
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*--------------------------------------
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CSH.fCall ldx ZPPtr1
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phx
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ldx ZPPtr1+1 local : fdef Ptr
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phx
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ldx ZPPtr2 local : type
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phx
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ldx ZPPtr2+1 local : qual
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phx
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ldx ZPPtr3 local : variadic size
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phx
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ldx ZPPtr3+1 local : f
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phx
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>STYA ZPPtr2 save Type/qual
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stz ZPPtr3 Reset VARIADIC byte count
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>LDYA L.CSH.FN
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jsr CSH.LookupFN
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bcs .10
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stx ZPPtr3+1 X = function index
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>STYA ZPPtr1 f() definition, starting at returned type
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jsr CSH.GetCharNB
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bcs .10
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cmp #'('
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bne .52
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jsr CSH.GetNextCharNB skip '('
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bcs .10
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jsr CSH.ZPPtr1GetW Y,A = Return value Type/Qual
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ldx ZPPtr2
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beq .1 no check required
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cpy ZPPtr2
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bne .91
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cmp ZPPtr2+1
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bne .91
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.1 >STYA ZPPtr2 this will be the returned type/qual
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jsr CSH.ZPPtr1GetNextW advance to arg list type
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beq .7 end of list, go check ending ')'
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*--------------------------------------
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.3 cpy #CSH.T.VARIADIC if VARIADIC, don't advance to next arg and assume type = 0
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bne .4
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ldy #0
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lda #0
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.4 jsr CSH.ExpEval Y,A = 0 if VARIADIC
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bcs .93
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jsr CSH.GetVarSize Y,A = Var Type/Qual
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tax
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lda (ZPPtr1)
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eor #CSH.T.VARIADIC
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bne .5
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txa
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clc make sure pointer only 2 bytes
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adc ZPPtr3
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sta ZPPtr3 Add to byte count
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bra .51 stay on VARIADIC tag
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.5 jsr CSH.ZPPtr1NextW
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.51 jsr CSH.GetCharNB
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.10 bcs .90
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cmp #','
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bne .6
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jsr CSH.GetNextCharNB Skip ,
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jsr CSH.ZPPtr1GetW
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bne .3 Another ARG....
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.52 bra .90 extra args....error
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.6 cmp #')'
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bne .90
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jsr CSH.ZPPtr1GetW
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beq .8 no more arg after ')', exit
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cpy #CSH.T.VARIADIC
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bne .90 missing arg
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>PUSHB ZPPtr3 push VARIADIC byte count
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bra .8
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.7 jsr CSH.GetCharNB
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bcs .90
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cmp #')'
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bne .90
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.8 jsr CSH.GetNextCharNB Skip )
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ldx ZPPtr3+1
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jsr CSH.Exec
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bcs .93
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>LDYA ZPPtr2 type/qual
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bra .93
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.90 lda #E.CSYN
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bra .92
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.91 lda #E.TMISMATCH
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.92 sec
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.93 plx
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stx ZPPtr3+1
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plx
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stx ZPPtr3
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plx
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stx ZPPtr2+1
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plx
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stx ZPPtr2
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plx
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stx ZPPtr1+1
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plx
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stx ZPPtr1
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.99 rts
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*--------------------------------------
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MAN
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SAVE usr/src/bin/csh.s.exp
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LOAD usr/src/bin/csh.s
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ASM
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