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Another small improvement

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git-svn-id: svn://svn.cc65.org/cc65/trunk@2145 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz 2003-05-04 22:27:20 +00:00
parent c0ca2e2a62
commit cfe7a8c246
1 changed files with 6 additions and 6 deletions
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12
libsrc/common/strncpy.s
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@ -6,7 +6,7 @@
.export _strncpy .export _strncpy
.import popax .import popax
.importzp ptr1, ptr2, ptr3, tmp1, tmp2 .importzp ptr1, ptr2, tmp1, tmp2, tmp3
.proc _strncpy .proc _strncpy
@ -15,14 +15,14 @@
txa txa
eor #$FF eor #$FF
sta tmp2 ; Store -size - 1 sta tmp2 ; Store -size - 1
jsr popax ; get src jsr popax ; get src
sta ptr1 sta ptr1
stx ptr1+1 stx ptr1+1
jsr popax ; get dest jsr popax ; get dest
sta ptr2 sta ptr2
stx ptr2+1 stx ptr2+1
sta ptr3 ; remember for function return stx tmp3 ; remember for function return
stx ptr3+1
; Copy src -> dest up to size bytes ; Copy src -> dest up to size bytes
@ -41,7 +41,7 @@ L2: lda (ptr1),y ; Copy one character
inc ptr1+1 inc ptr1+1
inc ptr2+1 ; Bump high bytes inc ptr2+1 ; Bump high bytes
bne L1 ; Branch always bne L1 ; Branch always
; Fill the remaining bytes. A is zero if we come here ; Fill the remaining bytes. A is zero if we come here
L3: inx L3: inx
@ -57,8 +57,8 @@ L4: sta (ptr2),y
; Done, return dest ; Done, return dest
L9: lda ptr3 L9: lda ptr2 ; Get low byte
ldx ptr3+1 ldx tmp3 ; Get unchanged high byte
rts rts
.endproc .endproc