feat: cut over to WASM backend

src/wasm/core.cpp

@@ -103,6 +103,11 @@ extern "C" void uce_wasm_link_anchors()
 		(void*)(const char* (*)(const char*, int))&strchr,
 		(void*)(const char* (*)(const char*, int))&strrchr,
 		(void*)(const char* (*)(const char*, const char*))&strstr,
+		// ctype family (int(int)); units use these directly
+		(void*)&isalnum, (void*)&isalpha, (void*)&isblank, (void*)&iscntrl,
+		(void*)&isdigit, (void*)&isgraph, (void*)&islower, (void*)&isprint,
+		(void*)&ispunct, (void*)&isspace, (void*)&isupper, (void*)&isxdigit,
+		(void*)&tolower, (void*)&toupper,
 	};
 	(void)libc_anchors;
 }
@@ -170,8 +175,13 @@ struct RequestPropsScope
 	}
 };
 
-// kind values shared with the host loader (see src/wasm/worker.h)
-enum WasmResolveKind { WASM_RESOLVE_COMPONENT = 0, WASM_RESOLVE_RENDER = 1, WASM_RESOLVE_EXISTS = 2 };
+// kind values shared with the host loader (src/wasm/worker.cpp)
+enum WasmResolveKind {
+	WASM_RESOLVE_COMPONENT = 0,
+	WASM_RESOLVE_RENDER = 1,
+	WASM_RESOLVE_EXISTS = 2,
+	WASM_RESOLVE_ONCE = 3,
+};
 
 static s32 wasm_resolve_target(String target, s32 kind, String* resolved_out = 0)
 {
@@ -205,6 +215,26 @@ bool component_exists(String name)
 	return(component_resolve(name) != "");
 }
 
+// Run a unit's ONCE() handler at most once per request (native
+// compiler_run_unit_once_if_needed semantics): dedup on the resolved unit
+// path via request.once_units. The handler emits head assets, etc.
+static void wasm_run_once(const String& resolved, Request& request)
+{
+	if(resolved == "")
+		return;
+	if(request.once_units.find(resolved) != request.once_units.end())
+		return;
+	request.once_units.insert(resolved);
+	s32 once_slot = wasm_resolve_target(resolved, WASM_RESOLVE_ONCE);
+	if(once_slot == 0)
+		return;
+	String previous_unit = request.resources.current_unit_file;
+	request.resources.current_unit_file = resolved;
+	request_ref_handler once_handler = (request_ref_handler)(uintptr_t)once_slot;
+	once_handler(request);
+	request.resources.current_unit_file = previous_unit;
+}
+
 void component_render(String name, DValue props, Request& request)
 {
 	String resolved;
@@ -214,6 +244,7 @@ void component_render(String name, DValue props, Request& request)
 		print(component_error_banner("component not found: " + trim(name)));
 		return;
 	}
+	wasm_run_once(resolved, request);
 	RequestPropsScope props_scope(&request, props);
 	String previous_unit = request.resources.current_unit_file;
 	if(resolved != "")
@@ -249,6 +280,7 @@ void unit_render(String file_name, Request& request)
 		print(component_error_banner("unit not found: " + trim(file_name)));
 		return;
 	}
+	wasm_run_once(resolved, request);
 	String previous_unit = request.resources.current_unit_file;
 	if(resolved != "")
 		request.resources.current_unit_file = resolved;
@@ -261,6 +293,15 @@ void unit_render(String file_name) { unit_render(file_name, *context); }
 
 extern "C" {
 
+// Host calls this to render the request's entry unit. Routing through
+// unit_render gives the entry the same ONCE() + dispatch semantics as
+// components (the host pre-loaded it, so resolution is a cache hit).
+void uce_wasm_render_entry(const char* path, size_t len)
+{
+	// the host always runs uce_wasm_core_init + apply_context before this
+	unit_render(String(path, len), *context);
+}
+
 void* uce_alloc(size_t len)
 {
 	return(malloc(len));