globals.c
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globals.c
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	#include <string.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <inttypes.h>

	#include "ant.h"
	#include "errors.h"
	#include "runtime.h"
	#include "internal.h"
	#include "descriptors.h"
	#include "silver/engine.h"

	#include "modules/buffer.h"
	#include "modules/events.h"
	#include "modules/collections.h"
	#include "modules/domexception.h"
	#include "modules/globals.h"

	ant_value_t js_report_error(ant_t js, ant_value_t args, int nargs) {
	if (nargs < 1) return js_mkerr_typed(js, JS_ERR_TYPE, "reportError requires 1 argument");

	ant_value_t error = args[0];
	ant_value_t global = js_glob(js);

	const char *msg = "";
	uint8_t et = vtype(error);

	if (et == T_STR) {
	msg = js_str(js, error);
	} else if (et == T_OBJ) {
	const char *m = get_str_prop(js, error, "message", 7, NULL);
	if (m && *m) msg = m;
	}

	if (!*msg) {
	ant_value_t str = js_tostring_val(js, error);
	if (vtype(str) == T_STR) { const char *s = js_str(js, str); if (s) msg = s; }
	}

	const char *filename = "";
	int lineno = 1, colno = 1;
	js_get_call_location(js, &filename, &lineno, &colno);
	if (!filename) filename = "";

	ant_value_t loc = js_get(js, global, "location");
	if (vtype(loc) == T_OBJ) {
	const char *href = get_str_prop(js, loc, "href", 4, NULL);
	if (href && *href) filename = href;
	}

	ant_value_t event = js_mkobj(js);
	js_set(js, event, "type", js_mkstr(js, "error", 5));
	js_set(js, event, "message", js_mkstr(js, msg, strlen(msg)));
	js_set(js, event, "filename", js_mkstr(js, filename, strlen(filename)));
	js_set(js, event, "lineno", js_mknum(lineno));
	js_set(js, event, "colno", js_mknum(colno));
	js_set(js, event, "error", error);

	js_dispatch_global_event(js, event);
	ant_value_t handler = js_get(js, global, "onerror");

	uint8_t ht = vtype(handler);
	if (ht == T_FUNC \|\| ht == T_CFUNC) {
	ant_value_t msg_str = js_mkstr(js, msg, strlen(msg));
	ant_value_t file_str = js_mkstr(js, filename, strlen(filename));
	ant_value_t call_args[5] = { msg_str, file_str, js_mknum(lineno), js_mknum(colno), error };
	sv_vm_call(js->vm, js, handler, global, call_args, 5, NULL, false);
	}

	return js_mkundef();
	}

	bool js_fire_unhandled_rejection(ant_t *js, ant_value_t promise_val, ant_value_t reason) {
	ant_value_t global = js_glob(js);
	ant_value_t handler = js_get(js, global, "onunhandledrejection");

	uint8_t ht = vtype(handler);
	if (ht != T_FUNC && ht != T_CFUNC) return false;

	ant_value_t event = js_mkobj(js);
	js_set(js, event, "type", js_mkstr(js, "unhandledrejection", 18));
	js_set(js, event, "reason", reason);
	js_set(js, event, "promise", promise_val);

	ant_value_t call_args[1] = { event };
	sv_vm_call(js->vm, js, handler, global, call_args, 1, NULL, false);

	return true;
	}

	void js_fire_rejection_handled(ant_t *js, ant_value_t promise_val, ant_value_t reason) {
	ant_value_t global = js_glob(js);
	ant_value_t handler = js_get(js, global, "onrejectionhandled");

	uint8_t ht = vtype(handler);
	if (ht != T_FUNC && ht != T_CFUNC) return;

	ant_value_t event = js_mkobj(js);
	js_set(js, event, "type", js_mkstr(js, "rejectionhandled", 16));
	js_set(js, event, "reason", reason);
	js_set(js, event, "promise", promise_val);

	ant_value_t call_args[1] = { event };
	sv_vm_call(js->vm, js, handler, global, call_args, 1, NULL, false);
	}

	static void sc_add_seen(ant_t *js, ant_value_t seen, ant_value_t val, ant_value_t clone) {
	char key[24];
	snprintf(key, sizeof(key), "%" PRIxPTR, (uintptr_t)vdata(val));
	js_set(js, seen, key, clone);
	}

	static ant_value_t sc_lookup_seen(ant_t *js, ant_value_t seen, ant_value_t val) {
	char key[24];
	snprintf(key, sizeof(key), "%" PRIxPTR, (uintptr_t)vdata(val));
	ant_value_t found = js_get(js, seen, key);
	return (vtype(found) == T_UNDEF) ? js_mkundef() : found;
	}

	static const char *sc_ta_type_name(TypedArrayType type) {
	static const char *names[] = {
	"Int8Array", "Uint8Array", "Uint8ClampedArray",
	"Int16Array", "Uint16Array",
	"Int32Array", "Uint32Array",
	"Float32Array", "Float64Array",
	"BigInt64Array", "BigUint64Array"
	};
	int i = (int)type;
	if (i < 0 \|\| i > 10) return "Uint8Array";
	return names[i];
	}

	static ant_value_t sc_clone_rec(ant_t *js, ant_value_t val, ant_value_t seen) {
	uint8_t t = vtype(val);

	if (t == T_UNDEF \|\| t == T_NULL \|\| t == T_BOOL \|\| t == T_NUM \|\| t == T_BIGINT \|\| t == T_STR) return val;
	if (t == T_SYMBOL) return js_throw(js, make_dom_exception(js, "Symbol cannot be serialized", "DataCloneError"));

	if (t == T_TYPEDARRAY) {
	ant_value_t existing = sc_lookup_seen(js, seen, val);
	if (vtype(existing) != T_UNDEF) return existing;

	TypedArrayData ta = (TypedArrayData )js_gettypedarray(val);
	if (!ta \|\| !ta->buffer)
	return js_throw(js, make_dom_exception(js, "TypedArray could not be cloned", "DataCloneError"));

	ArrayBufferData *new_buf = create_array_buffer_data(ta->byte_length);
	if (!new_buf) return js_mkerr(js, "out of memory");
	if (ta->byte_length > 0) memcpy(new_buf->data, ta->buffer->data + ta->byte_offset, ta->byte_length);

	ant_value_t clone = create_typed_array(js, ta->type, new_buf, 0, ta->length, sc_ta_type_name(ta->type));
	sc_add_seen(js, seen, val, clone);

	return clone;
	}

	if (t == T_FUNC \|\| t == T_CFUNC \|\| t == T_CLOSURE)
	return js_throw(js, make_dom_exception(js, "() => {} could not be cloned", "DataCloneError"));
	if (t == T_PROMISE \|\| t == T_GENERATOR)
	return js_throw(js, make_dom_exception(js, "Value could not be cloned", "DataCloneError"));
	if (!is_object_type(val))
	return js_throw(js, make_dom_exception(js, "Value could not be cloned", "DataCloneError"));

	ant_value_t existing = sc_lookup_seen(js, seen, val);
	if (vtype(existing) != T_UNDEF) return existing;

	if (t == T_ARR) {
	ant_value_t clone = js_mkarr(js);
	sc_add_seen(js, seen, val, clone);

	ant_offset_t len = js_arr_len(js, val);
	for (ant_offset_t i = 0; i < len; i++) {
	ant_value_t ic = sc_clone_rec(js, js_arr_get(js, val, i), seen);
	if (is_err(ic)) return ic;
	js_arr_push(js, clone, ic);
	}

	return clone;
	}

	ant_object_t *obj_ptr = js_obj_ptr(val);
	if (!obj_ptr)
	return js_throw(js, make_dom_exception(js, "Value could not be cloned", "DataCloneError"));

	if (obj_ptr->type_tag == T_WEAKMAP \|\| obj_ptr->type_tag == T_WEAKSET)
	return js_throw(js, make_dom_exception(js, "WeakMap/WeakSet could not be cloned", "DataCloneError"));

	if (obj_ptr->type_tag == T_MAP) {
	ant_value_t clone = js_mkobj(js);
	js_obj_ptr(clone)->type_tag = T_MAP;

	ant_value_t map_proto = js_get_ctor_proto(js, "Map", 3);
	if (is_special_object(map_proto)) js_set_proto_init(clone, map_proto);

	map_entry_t *new_head = ant_calloc(sizeof(map_entry_t ));
	if (!new_head) return js_mkerr(js, "out of memory");

	*new_head = NULL;
	js_set_slot(clone, SLOT_DATA, ANT_PTR(new_head));
	sc_add_seen(js, seen, val, clone);

	map_entry_t **src_head = get_map_from_obj(js, val);
	if (src_head && *src_head) {
	map_entry_t e, tmp;
	HASH_ITER(hh, *src_head, e, tmp) {
	ant_value_t vc = sc_clone_rec(js, e->value, seen);
	if (is_err(vc)) return vc;

	map_entry_t *ne = ant_calloc(sizeof(map_entry_t));
	if (!ne) return js_mkerr(js, "out of memory");
	ne->key = strdup(e->key);
	ne->value = vc;
	HASH_ADD_STR(*new_head, key, ne);
	}}

	return clone;
	}

	if (obj_ptr->type_tag == T_SET) {
	ant_value_t clone = js_mkobj(js);
	js_obj_ptr(clone)->type_tag = T_SET;

	ant_value_t set_proto = js_get_ctor_proto(js, "Set", 3);
	if (is_special_object(set_proto)) js_set_proto_init(clone, set_proto);

	set_entry_t *new_head = ant_calloc(sizeof(set_entry_t ));
	if (!new_head) return js_mkerr(js, "out of memory");
	*new_head = NULL;
	js_set_slot(clone, SLOT_DATA, ANT_PTR(new_head));
	sc_add_seen(js, seen, val, clone);

	set_entry_t **src_head = get_set_from_obj(js, val);
	if (src_head && *src_head) {
	set_entry_t e, tmp;
	HASH_ITER(hh, *src_head, e, tmp) {
	ant_value_t vc = sc_clone_rec(js, e->value, seen);
	if (is_err(vc)) return vc;

	set_entry_t *ne = ant_calloc(sizeof(set_entry_t));
	if (!ne) return js_mkerr(js, "out of memory");
	ne->key = strdup(e->key);
	ne->value = vc;
	HASH_ADD_STR(*new_head, key, ne);
	}}

	return clone;
	}

	if (js_get_slot(val, SLOT_ERROR_BRAND) == js_true) {
	ant_value_t clone = js_mkobj(js);
	sc_add_seen(js, seen, val, clone);

	const char *msg = get_str_prop(js, val, "message", 7, NULL);
	const char *name = get_str_prop(js, val, "name", 4, NULL);
	const char *stack = get_str_prop(js, val, "stack", 5, NULL);

	if (msg) js_set(js, clone, "message", js_mkstr(js, msg, strlen(msg)));
	if (name) js_set(js, clone, "name", js_mkstr(js, name, strlen(name)));
	if (stack) js_set(js, clone, "stack", js_mkstr(js, stack, strlen(stack)));
	js_set_slot(clone, SLOT_ERROR_BRAND, js_true);

	ant_value_t err_type = js_get_slot(val, SLOT_ERR_TYPE);
	if (vtype(err_type) != T_UNDEF) js_set_slot(clone, SLOT_ERR_TYPE, err_type);

	return clone;
	}

	ant_value_t date_proto = js_get_ctor_proto(js, "Date", 4);
	if (
	vtype(date_proto) != T_UNDEF
	&& is_object_type(date_proto)
	&& js_is_prototype_of(js, date_proto, val)
	) {
	ant_value_t clone = js_mkobj(js);
	js_set_proto_init(clone, date_proto);
	js_set_slot(clone, SLOT_DATA, js_get_slot(val, SLOT_DATA));
	sc_add_seen(js, seen, val, clone);

	return clone;
	}

	ant_value_t clone = js_mkobj(js);
	sc_add_seen(js, seen, val, clone);

	ant_iter_t iter = js_prop_iter_begin(js, val);
	const char *key;
	size_t key_len;
	ant_value_t pval;

	while (js_prop_iter_next(&iter, &key, &key_len, &pval)) {
	ant_value_t pc = sc_clone_rec(js, pval, seen);
	if (is_err(pc)) { js_prop_iter_end(&iter); return pc; }
	js_set(js, clone, key, pc);
	}

	js_prop_iter_end(&iter);
	return clone;
	}

	ant_value_t js_structured_clone(ant_t js, ant_value_t args, int nargs) {
	if (nargs < 1) return js_mkundef();
	// TODO: transfer option (args[1]) accepted but not yet implemented
	ant_value_t seen = js_mkobj(js);
	return sc_clone_rec(js, args[0], seen);
	}

	void init_globals_module(void) {
	ant_t *js = rt->js;
	ant_value_t global = js_glob(js);

	js_set(js, global, "reportError", js_mkfun(js_report_error));
	js_set_descriptor(js, global, "reportError", 11, JS_DESC_W \| JS_DESC_C);

	js_set(js, global, "structuredClone", js_mkfun(js_structured_clone));
	js_set_descriptor(js, global, "structuredClone", 15, JS_DESC_W \| JS_DESC_C);
	}

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