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git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/common/strcmp.s

@@ -0,0 +1,35 @@
+;
+; Ullrich von Bassewitz, 31.05.1998
+;
+; int strcmp (const char* s1, const char* s2);
+;
+
+	.export		_strcmp
+	.import		popax
+	.importzp	ptr1, ptr2
+
+_strcmp:
+	sta	ptr2		; Save s2
+	stx	ptr2+1
+	jsr	popax 		; Get s1
+	sta	ptr1
+	stx	ptr1+1
+	ldy	#0
+
+loop:	lda	(ptr1),y
+ 	cmp	(ptr2),y
+	bne    	L1
+	tax	  		; end of strings?
+	beq	L3
+	iny
+	bne	loop
+	inc	ptr1+1
+	inc	ptr2+1
+	bne	loop
+
+L1:	bcs	L2
+	ldx	#$FF
+	rts
+
+L2:	ldx	#$01
+L3:	rts