W5

src/lib/functionlib.cpp

@@ -642,41 +642,69 @@ StringList regex_split(String pattern, String subject, String flags)
 
 #else
 
+// PCRE2 is not compiled into the wasm core; regex runs host-side (the host
+// already links libpcre2). One UCEB1-marshalled hostcall carries the request
+// {op,pattern,subject,flags,replacement} in and the result tree out — the host
+// runs the real regex_* and packs the answer. See uce_host_regex in
+// src/wasm/worker.cpp.
+extern "C" size_t uce_host_regex(const char* in, size_t in_len, char* out, size_t cap);
+
+static DValue wasm_regex_call(String op, String pattern, String subject, String flags, String replacement = "")
+{
+	DValue request;
+	request["op"] = op;
+	request["pattern"] = pattern;
+	request["subject"] = subject;
+	request["flags"] = flags;
+	request["replacement"] = replacement;
+	String encoded = ucb_encode(request);
+	size_t need = uce_host_regex(encoded.data(), encoded.size(), 0, 0);
+	if(need == 0)
+		return(DValue());
+	String buffer(need, 0);
+	size_t got = uce_host_regex(encoded.data(), encoded.size(), &buffer[0], need);
+	if(got == 0 || got > need)
+		return(DValue());
+	DValue response;
+	String error;
+	ucb_decode(String(buffer.data(), got), response, &error);
+	return(response);
+}
+
 bool regex_match(String pattern, String subject, String flags)
 {
-	(void)pattern; (void)subject; (void)flags;
-	return(false);
+	return(wasm_regex_call("match", pattern, subject, flags)["bool"].to_bool());
 }
 
 DValue regex_search(String pattern, String subject, String flags)
 {
-	DValue result;
-	result["matched"].set_bool(false);
-	result["pattern"] = pattern;
-	result["flags"] = flags == "" ? "default" : flags;
-	return(result);
+	DValue response = wasm_regex_call("search", pattern, subject, flags);
+	DValue* tree = response.key("tree");
+	return(tree ? *tree : DValue());
 }
 
 DValue regex_search_all(String pattern, String subject, String flags)
 {
-	DValue result;
-	result["matched"].set_bool(false);
-	result["pattern"] = pattern;
-	result["flags"] = flags == "" ? "default" : flags;
-	result["count"] = (f64)0;
-	return(result);
+	DValue response = wasm_regex_call("search_all", pattern, subject, flags);
+	DValue* tree = response.key("tree");
+	return(tree ? *tree : DValue());
 }
 
 String regex_replace(String pattern, String replacement, String subject, String flags)
 {
-	(void)pattern; (void)replacement; (void)flags;
-	return(subject);
+	return(wasm_regex_call("replace", pattern, subject, flags, replacement)["text"].to_string());
 }
 
 StringList regex_split(String pattern, String subject, String flags)
 {
-	(void)pattern; (void)flags;
-	return(StringList{ subject });
+	DValue response = wasm_regex_call("split", pattern, subject, flags);
+	StringList result;
+	DValue* list = response.key("list");
+	if(list)
+		list->each([&](const DValue& part, String) {
+			result.push_back(part.to_string());
+		});
+	return(result);
 }
 
 #endif