4 files changed, 37 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index ef71e96..df852dd 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CS=        com.c dis.c ht.c lib.c mem.c read.c state.c        val.c vm.c
 HS=chunk.h com.h dis.h ht.h lib.h mem.h read.h state.h util.h val.h vm.h
-CFLAGS=$(EXTRA_CFLAGS) -g -lm -Wall -Wpedantic -Werror=implicit-function-declaration
+CFLAGS=$(EXTRA_CFLAGS) -O3 -g -lm -Wall -Wpedantic -Werror=implicit-function-declaration
 
 bth: $(CS) $(HS) Makefile
 	$(CC) $(CFLAGS) -o bth $(CS)
diff --git a/lib.c b/lib.c
index dddd377..5d5d2b3 100644
--- a/lib.c
+++ b/lib.c
@@ -94,6 +94,27 @@ static Val fn_spend(State *S, int nargs, Val *args) {
 	}
 	return VAL_OBJ(objstring_take(S, new, len));
 }
+static Val fn_ssplit(State *S, int nargs, Val *args) {
+	CHECK(nargs==2,"need exactly 2 args for ssplit");
+	CHECK(IS_STRING(args[0]) && IS_STRING(args[1]), "need two strings for ssplit");
+	ObjString *delim = AS_STRING(args[0]);
+	ObjString *text = AS_STRING(args[1]);
+	CHECK(delim->len == 1, "need length-1 delimiter");
+	char delimc = delim->d[0];
+
+	ObjArr *out = objarr_new(S);
+	int start = 0;
+	for (int i = 0; i <= text->len; i++) {
+		if (text->d[i] == delimc || i == text->len) {
+			ObjString *new = objstring_copy(S, &text->d[start], i-start);
+			objarr_append(S, out, VAL_OBJ(new));
+			start = i + 1;
+		}
+	}
+
+	return VAL_OBJ(out);
+}
+
 
 
 typedef struct {
@@ -111,6 +132,7 @@ static BuiltinFunc builtin_funcs[] = {
 	{ "#", fn_len },
 	{ ",", fn_pend },
 	{ "s,", fn_spend },
+	{ "ssplit", fn_ssplit },
 	{ 0 },
 };
 
diff --git a/tests/ssplit.bth b/tests/ssplit.bth
new file mode 100644
index 0000000..4dbc860
--- /dev/null
+++ b/tests/ssplit.bth
@@ -0,0 +1,7 @@
+(say (ssplit " " "aaa bbb ccc"))
+(say (ssplit 'l "flucloxacillin"))
+(say (ssplit 'l "hi"))
+(say (ssplit 'l ""))
+(say (ssplit 'l 'local))
+(say (ssplit 'l 'focal))
+(say (ssplit 'l 'locate))
diff --git a/tests/ssplit.out b/tests/ssplit.out
new file mode 100644
index 0000000..fd23afa
--- /dev/null
+++ b/tests/ssplit.out
@@ -0,0 +1,7 @@
+[aaa bbb ccc]
+[f uc oxaci  in]
+[hi]
+[]
+[ oca ]
+[foca ]
+[ ocate]