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TITLE CPARSE
INCLUDE COMSW.ASM
.xlist
.xcref
INCLUDE DOSSYM.ASM
INCLUDE DEVSYM.ASM
INCLUDE COMSEG.ASM
.list
.cref
INCLUDE COMEQU.ASM
DATARES SEGMENT PUBLIC
DATARES ENDS
TRANDATA SEGMENT PUBLIC
EXTRN BADCPMES:BYTE
TRANDATA ENDS
TRANSPACE SEGMENT PUBLIC
EXTRN CURDRV:BYTE,ELPOS:BYTE,STARTEL:WORD
EXTRN SKPDEL:BYTE,SWITCHAR:BYTE,ELCNT:BYTE
TRANSPACE ENDS
TRANCODE SEGMENT PUBLIC BYTE
ASSUME CS:TRANGROUP,DS:TRANGROUP,ES:TRANGROUP
EXTRN DELIM:NEAR,UPCONV:NEAR,PATHCHRCMP:NEAR
EXTRN SWLIST:BYTE,BADCDERR:NEAR,SCANOFF:NEAR,CERROR:NEAR
if KANJI
EXTRN TESTKANJ:NEAR
endif
SWCOUNT EQU 5
PUBLIC CPARSE
CPARSE:
;-----------------------------------------------------------------------;
; ENTRY: ;
; DS:SI Points input buffer ;
; ES:DI Points to the token buffer ;
; BL Special delimiter for this call ;
; Always checked last ;
; set it to space if there is no special delimiter ;
; EXIT: ;
; DS:SI Points to next char in the input buffer ;
; ES:DI Points to the token buffer ;
; [STARTEL] Points to start of last element of path in token ;
; points to a NUL for no element strings 'd:' 'd:/' ;
; CX Character count ;
; BH Condition Code ;
; Bit 1H of BH set if switch character ;
; Token buffer contains char after ;
; switch character ;
; BP has switch bits set (ORing only) ;
; Bit 2H of BH set if ? or * in token ;
; if * found element ? filled ;
; Bit 4H of BH set if path sep in token ;
; Bit 80H of BH set if the special delimiter ;
; was skipped at the start of this token ;
; Token buffer always starts d: for non switch tokens ;
; CARRY SET ;
; if CR on input ;
; token buffer not altered ;
; ;
; DOES NOT RETURN ON BAD PATH ERROR ;
; MODIFIES: ;
; CX, SI, AX, BH, DX and the Carry Flag ; ;
; ;
; -----------------------------------------------------------------------;
xor ax,ax
mov [STARTEL],DI ; No path element (Is DI correct?)
mov [ELPOS],al ; Start in 8 char prefix
mov [SKPDEL],al ; No skip delimiter yet
mov bh,al ; Init nothing
pushf ; save flags
push di ; save the token buffer addrss
xor cx,cx ; no chars in token buffer
moredelim:
LODSB
CALL DELIM
JNZ SCANCDONE
CMP AL,' '
JZ moredelim
CMP AL,9
JZ moredelim
xchg al,[SKPDEL]
or al,al
jz moredelim ; One non space/tab delimiter allowed
JMP x_done ; Nul argument
SCANCDONE:
IF NOT KANJI
call UPCONV
ENDIF
cmp al,bl ; Special delimiter?
jnz nospec
or bh,80H
jmp short moredelim
nospec:
cmp al,0DH ; a CR?
jne ncperror
jmp cperror
ncperror:
cmp al,[SWITCHAR] ; is the char the switch char?
jne na_switch ; yes, process...
jmp a_switch
na_switch:
cmp byte ptr [si],':'
jne anum_chard ; Drive not specified
IF KANJI
call UPCONV
ENDIF
call move_char
lodsb ; Get the ':'
call move_char
mov [STARTEL],di
mov [ELCNT],0
jmp anum_test
anum_chard:
mov [STARTEL],di
mov [ELCNT],0 ; Store of this char sets it to one
call PATHCHRCMP ; Starts with a pathchar?
jnz anum_char ; no
push ax
mov al,[CURDRV] ; Insert drive spec
add al,'A'
call move_char
mov al,':'
call move_char
pop ax
mov [STARTEL],di
mov [ELCNT],0
anum_char:
IF KANJI
call TESTKANJ
jz TESTDOT
call move_char
lodsb
jmp short notspecial
TESTDOT:
ENDIF
cmp al,'.'
jnz testquest
inc [ELPOS] ; flag in extension
mov [ELCNT],0FFH ; Store of the '.' resets it to 0
testquest:
cmp al,'?'
jnz testsplat
or bh,2
testsplat:
cmp al,'*'
jnz testpath
or bh,2
mov ah,7
cmp [ELPOS],0
jz gotelcnt
mov ah,2
gotelcnt:
mov al,'?'
sub ah,[ELCNT]
jc badperr2
xchg ah,cl
jcxz testpathx
qmove:
xchg ah,cl
call move_char
xchg ah,cl
loop qmove
testpathx:
xchg ah,cl
testpath:
call PATHCHRCMP
jnz notspecial
or bh,4
test bh,2 ; If just hit a '/', cannot have ? or * yet
jnz badperr
mov [STARTEL],di ; New element
INC [STARTEL] ; Point to char after /
mov [ELCNT],0FFH ; Store of '/' sets it to 0
mov [ELPOS],0
notspecial:
call move_char ; just an alphanum string
anum_test:
lodsb
IF NOT KANJI
call UPCONV
ENDIF
call DELIM
je x_done
cmp al,0DH
je x_done
cmp al,[SWITCHAR]
je x_done
cmp al,bl
je x_done
cmp al,':' ; ':' allowed as trailer because
; of devices
IF KANJI
je FOO15
jmp anum_char
FOO15:
ELSE
jne anum_char
ENDIF
mov byte ptr [si-1],' ' ; Change the trailing ':' to a space
jmp short x_done
badperr2:
mov dx,offset trangroup:BADCPMES
jmp CERROR
badperr:
jmp BADCDERR
cperror:
dec si ; adjust the pointer
pop di ; retrive token buffer address
popf ; restore flags
stc ; set the carry bit
return
x_done:
dec si ; adjust for next round
jmp short out_token
a_switch:
OR BH,1 ; Indicate switch
OR BP,GOTSWITCH
CALL SCANOFF
INC SI
cmp al,0DH
je cperror
call move_char ; store the character
CALL UPCONV
PUSH ES
PUSH DI
PUSH CX
PUSH CS
POP ES
ASSUME ES:TRANGROUP
MOV DI,OFFSET TRANGROUP:SWLIST
MOV CX,SWCOUNT
REPNE SCASB
JNZ out_tokenp
MOV AX,1
SHL AX,CL
OR BP,AX
out_tokenp:
POP CX
POP DI
POP ES
ASSUME ES:NOTHING
out_token:
mov al,0
stosb ; null at the end
pop di ; restore token buffer pointer
popf
clc ; clear carry flag
return
move_char:
stosb ; store char in token buffer
inc cx ; increment char count
inc [ELCNT] ; increment element count for * substi
return
TRANCODE ENDS
END
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