aboutsummaryrefslogtreecommitdiff
path: root/amforth-6.5/common/words/cscan.asm
diff options
context:
space:
mode:
Diffstat (limited to 'amforth-6.5/common/words/cscan.asm')
-rw-r--r--amforth-6.5/common/words/cscan.asm56
1 files changed, 56 insertions, 0 deletions
diff --git a/amforth-6.5/common/words/cscan.asm b/amforth-6.5/common/words/cscan.asm
new file mode 100644
index 0000000..e043f60
--- /dev/null
+++ b/amforth-6.5/common/words/cscan.asm
@@ -0,0 +1,56 @@
+; ( addr1 n1 c -- addr1 n2 )
+; String
+; Scan string at addr1/n1 for the first occurance of c, leaving addr1/n2, char at n2 is first non-c character
+
+.if cpu_msp430==1
+ HEADER(XT_CSCAN,5,"cscan",DOCOLON)
+.endif
+
+.if cpu_avr8==1
+VE_CSCAN:
+ .dw $ff05
+ .db "cscan"
+ .dw VE_HEAD
+ .set VE_HEAD = VE_CSCAN
+XT_CSCAN:
+ .dw DO_COLON
+PFA_CSCAN:
+.endif
+ .dw XT_TO_R
+ .dw XT_OVER
+PFA_CSCAN1:
+ .dw XT_DUP
+ .dw XT_CFETCH
+ .dw XT_R_FETCH
+ .dw XT_EQUAL
+ .dw XT_ZEROEQUAL
+ .dw XT_DOCONDBRANCH
+ DEST(PFA_CSCAN2)
+ .dw XT_SWAP
+ .dw XT_1MINUS
+ .dw XT_SWAP
+ .dw XT_OVER
+ .dw XT_ZEROLESS ; not negative
+ .dw XT_ZEROEQUAL
+ .dw XT_DOCONDBRANCH
+ DEST(PFA_CSCAN2)
+ .dw XT_1PLUS
+ .dw XT_DOBRANCH
+ DEST(PFA_CSCAN1)
+PFA_CSCAN2:
+ .dw XT_NIP
+ .dw XT_OVER
+ .dw XT_MINUS
+ .dw XT_R_FROM
+ .dw XT_DROP
+ .dw XT_EXIT
+
+; : my-cscan ( addr len c -- addr len' )
+; >r over ( -- addr len addr )
+; begin
+; dup c@ r@ <> while
+; swap 1- swap over 0 >= while
+; 1+
+; repeat then
+; nip over - r> drop
+; ;