From aa82c562dbbbdabac2acc43d5002bfe8b46ca646 Mon Sep 17 00:00:00 2001
From: "B. Watson" <urchlay@slackware.uk>
Date: Sat, 11 Apr 2026 16:30:26 -0400
Subject: strlen() => strlen8(), save a measly 4 bytes. 7597 bytes free.

---
 src/complete.c |  3 ++-
 src/strlen8.s  | 24 ++++++++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100644 src/strlen8.s

(limited to 'src')

diff --git a/src/complete.c b/src/complete.c
index 0a7055b..fd889b2 100644
--- a/src/complete.c
+++ b/src/complete.c
@@ -47,12 +47,13 @@ void comp_add_pm_chan(const char *n) {
 }
 
 char match(const char *p, const char *q) {
+	extern unsigned char strlen8(const char *str);
 	char len;
 
 	while(*p == '#') p++;
 	while(*q == '#') q++;
 
-	len = strlen(p);
+	len = strlen8(p);
 	if(!len) return 0;
 
 	return strneq_i(p, q, len);
diff --git a/src/strlen8.s b/src/strlen8.s
new file mode 100644
index 0000000..c622d73
--- /dev/null
+++ b/src/strlen8.s
@@ -0,0 +1,24 @@
+ ; strlen() implementation that only looks at the first 256
+ ; byte of the string. returns 255 if the length is >=255.
+ ; saves a measly 4 bytes over the cc65 strlen().
+
+ ; extern unsigned char strlen8(const char *str);
+
+ .importzp ptr1
+ .export _strlen8
+
+_strlen8:
+ sta ptr1
+ stx ptr1+1
+ ldy #0
+@loop:
+ lda (ptr1),y
+ beq @done
+ iny
+ bne @loop
+ dey ; return(255) if Y rolls over
+@done:
+ tya
+ ldx #0 ; sadly necessary even though we return a char...
+ rts
+
-- 
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