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|
;
; string functions for lattice C
;
.xlist
include version.inc
include cmacros.inc
.list
sBegin data
assumes ds,data
externB XLTab
externB XUTab
sEnd
sBegin code
assumes cs,code
externP strlen
;
; strbscan (string, set) returns pointer to 1st char in set or end
;
cProc strbscan,<PUBLIC>,<SI,DI>
parmW str
parmW set
cBegin
push ds
pop es
cCall strlen,<set>
inc ax
mov bx, ax
mov si,str
cld
bscan:
lodsb
mov cx,bx
mov di,set
;
; While not in the set
;
repnz scasb
jnz bscan
lea ax,[si-1]
cEnd
;
; strbskip ( string, set ) returns pointer to 1st char not in set
;
cProc strbskip,<PUBLIC>,<SI,DI>
parmW str
parmW set
cBegin
push ds
pop es
cCall strlen,<set>
inc ax
mov bx, ax
mov si,str
cld
bskip:
lodsb
or al,al
jz eskip
mov cx,bx
mov di,set
;
; While not in the set
;
repnz scasb
jz bskip
eskip:
lea ax,[si-1]
cEnd
;
; strpre (s1, s2) returns -1 if s1 is a prefix of s2, 0 otherwise. Ignores
; case.
;
cProc strpre,<PUBLIC>,<si,di>
parmW pref
parmW str
cBegin
cld
mov si,pref
mov di,str
mov bx,dataOFFSET xltab
preCompare:
lodsb
mov ah,[di]
inc di
xlat
xchg ah,al
xlat
cmp ah,al
jnz preDif
or ah,ah
jnz preCompare
preYes:
mov ax,-1
jmp short preDone
preDif:
or ah,ah
jz preYes
xor ax,ax
preDone:
cEnd
sEnd
end
|
