mirror of
https://github.com/A2osX/A2osX.git
synced 2024-09-10 07:54:37 +00:00
250 lines
4.0 KiB
Plaintext
250 lines
4.0 KiB
Plaintext
NEW
|
||
AUTO 3,1
|
||
.LIST OFF
|
||
*--------------------------------------
|
||
* Input:
|
||
* ZPInputBufPtr, A = Expected type
|
||
* Output:
|
||
* CS, A = EC
|
||
* CC, X = Var Type, Value on Stack
|
||
*--------------------------------------
|
||
CSH.ExpEval ldx ZPPtr1
|
||
phx
|
||
ldx ZPPtr1+1 local : used by lookup
|
||
phx
|
||
ldx ZPPtr2 local : VarType
|
||
phx
|
||
ldx ZPPtr2+1 local : BOP
|
||
phx
|
||
|
||
sta ZPPtr2 local : expected type
|
||
|
||
lda #$ff
|
||
pha
|
||
*--------------------------------------
|
||
.10 jsr CSH.GetCharNB
|
||
bcs .19
|
||
|
||
.11 cmp #'('
|
||
bne .20
|
||
|
||
jsr CSH.GetNextCharNB skip (
|
||
bcs .19
|
||
|
||
lda ZPPtr2
|
||
|
||
jsr CSH.ExpEval
|
||
bcs .19
|
||
stx ZPPtr2
|
||
|
||
jsr CSH.GetCharNB
|
||
bcs .19
|
||
cmp #')'
|
||
bne .19
|
||
|
||
jsr CSH.GetNextCharNB skip )
|
||
bcc .31
|
||
.19 jmp .90
|
||
*--------------------------------------
|
||
.20 jsr CSH.IsLetter define, Fnc or Var ?
|
||
bcs .22
|
||
|
||
jsr CSH.GetDefine
|
||
bcc .10
|
||
|
||
jsr CSH.GetVar
|
||
bcs .21
|
||
|
||
ldx ZPPtr2 YA=VarID, X=expected var type (or 0=any)
|
||
|
||
jsr CSH.GetVarValueOnStack Y,A = VarID, Get value on stack
|
||
bcs .29
|
||
|
||
stx ZPPtr2 store real var type
|
||
bra .30
|
||
|
||
.21 lda ZPPtr2 var type
|
||
jsr CSH.fCall X = function index
|
||
bcs .29
|
||
|
||
stx ZPPtr2 store real var type
|
||
bra .30
|
||
|
||
.22 jsr CSH.IsDigit10 number ?
|
||
bcs .24
|
||
|
||
ldx ZPPtr2
|
||
bne .23
|
||
|
||
ldx #CSH.T.INT
|
||
stx ZPPtr2
|
||
|
||
.23 jsr CSH.GetNumOnStack
|
||
bcs .29
|
||
bra .30
|
||
|
||
.24 cmp #'"' String literal
|
||
bne .90
|
||
jsr CSH.AddContCharP
|
||
.29 bcs .99
|
||
*--------------------------------------
|
||
.30 jsr CSH.GetCharNB
|
||
bcs .90
|
||
|
||
.31 cmp #','
|
||
beq .80
|
||
|
||
cmp #')'
|
||
beq .80
|
||
|
||
cmp #';'
|
||
beq .80
|
||
|
||
jsr CSH.IsOPChar
|
||
bcs .90
|
||
|
||
>LDYA L.CSH.BOPS we are at V1 op1 V2 op2...
|
||
jsr CSH.LookupOP
|
||
bcs .90
|
||
|
||
stx ZPPtr2+1 save OP(n)
|
||
|
||
.32 pla get OP(n-1)
|
||
bmi .33 $ff....
|
||
|
||
cmp ZPPtr2+1
|
||
bcc .33 OP(n) has precedence, on stack : V1,V2
|
||
|
||
tax OP(n-1) has precedence...
|
||
|
||
lda ZPPtr2 Var Type
|
||
jsr CSH.BOP.EXEC compute V(n-1) <OP(n-1)> V(n)
|
||
bcc .32
|
||
|
||
bcs .99
|
||
|
||
.33 pha push back OP(n-1)
|
||
lda ZPPtr2+1 get OP(n)
|
||
pha push OP(n) on stack
|
||
|
||
jmp .10 go check for next token
|
||
*--------------------------------------
|
||
.80 plx any OP on stack ?
|
||
bmi .88
|
||
|
||
lda ZPPtr2 Var Type
|
||
jsr CSH.BOP.EXEC
|
||
bcc .80
|
||
|
||
bcs .99
|
||
|
||
.90 lda #CSH.E.SYNTAX
|
||
|
||
.99 plx
|
||
bpl .99
|
||
|
||
sec
|
||
.HS 90 BCC
|
||
.88 clc
|
||
|
||
ldx ZPPtr2 X = Var Type
|
||
|
||
ply
|
||
sty ZPPtr2+1
|
||
ply
|
||
sty ZPPtr2
|
||
ply
|
||
sty ZPPtr1+1
|
||
ply
|
||
sty ZPPtr1
|
||
rts
|
||
*--------------------------------------
|
||
CSH.AddContCharP
|
||
ldy #0
|
||
|
||
.1 jsr CSH.GetNextChar
|
||
bcs .9
|
||
cmp #C.CR
|
||
beq .9
|
||
cmp #'"'
|
||
beq .2
|
||
sta (ZPCSHConst),y
|
||
iny
|
||
bra .1
|
||
|
||
.2 lda #0
|
||
sta (ZPCSHConst),y
|
||
>PUSHW ZPCSHConst Push PTR on stack
|
||
|
||
tya
|
||
sec
|
||
adc ZPCSHConst
|
||
sta ZPCSHConst
|
||
bcc .3
|
||
inc ZPCSHConst+1
|
||
.3 jsr CSH.GetNextChar Skip "
|
||
|
||
clc
|
||
rts
|
||
.9 lda #CSH.E.SYNTAX
|
||
sec
|
||
rts
|
||
*--------------------------------------
|
||
CSH.GetNumOnStack
|
||
txa
|
||
beq .99
|
||
|
||
.10 cpx #CSH.T.FLOAT
|
||
bcc .1
|
||
bne .99
|
||
|
||
>PUSHW ZPInputBufPtr
|
||
>PUSHWI ZPInputBufPtr
|
||
>SYSCALL StrToF
|
||
clc
|
||
rts
|
||
|
||
.1 >PUSHW ZPInputBufPtr
|
||
>PUSHWI ZPInputBufPtr
|
||
>PUSHBI 10
|
||
phx
|
||
cpx #CSH.T.UCHAR
|
||
bcc .2
|
||
>SYSCALL StrToUL
|
||
bra .3
|
||
|
||
.2 >SYSCALL StrToL
|
||
|
||
.3 plx
|
||
bcs .9
|
||
|
||
lda CSH.TYPESIZE,x
|
||
cmp #4
|
||
beq .8
|
||
|
||
cmp #2
|
||
bne .4
|
||
ldy #1
|
||
>PULLA
|
||
sta (pStack),y
|
||
>PULLA
|
||
sta (pStack),y
|
||
clc
|
||
rts
|
||
|
||
.4 >PULLA
|
||
inc pStack
|
||
inc pStack
|
||
sta (pStack)
|
||
.8 clc
|
||
.9 rts
|
||
|
||
.99 lda #CSH.E.TMISMATCH
|
||
sec
|
||
rts
|
||
*--------------------------------------
|
||
MAN
|
||
SAVE usr/src/bin/csh.s.exp
|
||
LOAD usr/src/bin/csh.s
|
||
ASM
|