duk_ret_t StyleContext::jsPropertyGetter(duk_context *_ctx) {
// Storing state for a Duktape/C function:
// http://duktape.org/guide.html#programming.9
duk_push_current_function(_ctx);
duk_get_prop_string(_ctx, -1, ATTR_ID);
auto* attr = static_cast<const Accessor*> (duk_to_pointer(_ctx, -1));
if (!attr || !attr->ctx || !attr->ctx->m_feature) {
logMsg("Error: no context set %p %p\n",
attr,
attr ? attr->ctx : nullptr);
duk_pop(_ctx);
return 0;
}
auto it = attr->ctx->m_feature->props.get(attr->key);
if (it.is<std::string>()) {
duk_push_string(_ctx, it.get<std::string>().c_str());
} else if (it.is<float>()) {
duk_push_number(_ctx, it.get<float>());
} else {
duk_push_undefined(_ctx);
}
return 1;
}
static duk_ret_t ctx_call_pushed_function(duk_context *ctx) {
VALUE block; // the block to yield
struct state *state;
int nargs = duk_get_top(ctx); // number of arguments of the block (arity)
VALUE args = rb_ary_new(); // the block to yield needs an array of arguments
VALUE result; // the result returned by yielding the block
duk_push_current_function(ctx);
// get the block which is a property of the pushed function
duk_get_prop_string(ctx, -1, "block");
block = (VALUE) duk_get_pointer(ctx, -1);
duk_pop(ctx);
// get the state so that we don't need to a create a new one
duk_get_prop_string(ctx, -1, "state");
state = (struct state *) duk_get_pointer(ctx, -1);
duk_pop(ctx);
// before pushing each argument to the array, each one needs to be converted into a ruby value
for (int i = 0; i < nargs; i++)
rb_ary_push(args, ctx_stack_to_value(state, i));
result = rb_proc_call(block, args); // yield
ctx_push_ruby_object(state, result);
return 1;
}
static duk_ret_t my_func(duk_context *ctx) {
printf("current magic (on entry): %ld\n", (long) duk_get_current_magic(ctx));
duk_push_current_function(ctx);
duk_set_magic(ctx, -1, 456);
printf("current magic (after set): %ld\n", (long) duk_get_current_magic(ctx));
return 0;
}
static duk_ret_t my_func(duk_context *ctx) {
duk_c_function funcptr;
printf("my_func, top=%ld\n", (long) duk_get_top(ctx));
duk_push_current_function(ctx);
printf("type=%d\n", (int) duk_get_type(ctx, -1));
printf("duk_is_object: %d\n", (int) duk_is_object(ctx, -1));
printf("duk_is_function: %d\n", (int) duk_is_function(ctx, -1));
funcptr = duk_get_c_function(ctx, -1);
printf("duk_get_c_function matches my_func: %d\n", (my_func == funcptr ? 1 : 0));
printf("final top: %ld\n", (long) duk_get_top(ctx));
return 0;
}
void test(duk_context *ctx) {
duk_ret_t rc;
/* first test what happens when there is no running function */
printf("no running function\n");
duk_push_current_function(ctx);
printf("type=%d\n", (int) duk_get_type(ctx, -1));
printf("duk_is_object: %d\n", (int) duk_is_object(ctx, -1));
printf("duk_is_function: %d\n", (int) duk_is_function(ctx, -1));
duk_pop(ctx);
/* then test the basic case */
printf("basic case\n");
duk_push_c_function(ctx, my_func, 1 /*nargs*/);
duk_push_int(ctx, 123);
rc = duk_pcall(ctx, 1);
printf("rc=%d, result='%s'\n", (int) rc, duk_to_string(ctx, -1));
duk_pop(ctx);
}
static duk_ret_t test_func(duk_context *ctx, void *udata) {
(void) udata;
if (ctx) {
printf("dummy - return here\n"); fflush(stdout);
return 0;
}
/* Up-to-date for Duktape 1.3.0, alphabetical order:
* $ cd website/api; ls *.yaml
*/
(void) duk_alloc_raw(ctx, 0);
(void) duk_alloc(ctx, 0);
(void) duk_base64_decode(ctx, 0);
(void) duk_base64_encode(ctx, 0);
(void) duk_buffer_to_string(ctx, 0);
(void) duk_call_method(ctx, 0);
(void) duk_call_prop(ctx, 0, 0);
(void) duk_call(ctx, 0);
(void) duk_char_code_at(ctx, 0, 0);
(void) duk_check_stack_top(ctx, 0);
(void) duk_check_stack(ctx, 0);
(void) duk_check_type_mask(ctx, 0, 0);
(void) duk_check_type(ctx, 0, 0);
(void) duk_compact(ctx, 0);
(void) duk_compile_lstring_filename(ctx, 0, "dummy", 0);
(void) duk_compile_lstring(ctx, 0, "dummy", 0);
(void) duk_compile_string_filename(ctx, 0, "dummy");
(void) duk_compile_string(ctx, 0, "dummy");
(void) duk_compile(ctx, 0);
(void) duk_concat(ctx, 0);
(void) duk_config_buffer(ctx, 0, NULL, 0);
(void) duk_copy(ctx, 0, 0);
(void) duk_create_heap_default();
(void) duk_create_heap(NULL, NULL, NULL, NULL, NULL);
(void) duk_debugger_attach(ctx, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
(void) duk_debugger_cooperate(ctx);
(void) duk_debugger_detach(ctx);
(void) duk_debugger_notify(ctx, 0);
(void) duk_debugger_pause(ctx);
(void) duk_decode_string(ctx, 0, NULL, NULL);
(void) duk_def_prop(ctx, 0, 0);
(void) duk_del_prop_index(ctx, 0, 0);
(void) duk_del_prop_string(ctx, 0, "dummy");
(void) duk_del_prop(ctx, 0);
(void) duk_destroy_heap(ctx);
(void) duk_dump_function(ctx);
(void) duk_dup_top(ctx);
(void) duk_dup(ctx, 0);
(void) duk_enum(ctx, 0, 0);
(void) duk_equals(ctx, 0, 0);
duk_error_va(ctx, 0, NULL, NULL);
duk_error(ctx, 0, "dummy"); /* (void) cast won't work without variadic macros */
(void) duk_eval_lstring_noresult(ctx, "dummy", 0);
(void) duk_eval_lstring(ctx, "dummy", 0);
(void) duk_eval_noresult(ctx);
(void) duk_eval_string_noresult(ctx, "dummy");
(void) duk_eval_string(ctx, "dummy");
(void) duk_eval(ctx);
(void) duk_fatal(ctx, "dummy");
(void) duk_free_raw(ctx, NULL);
(void) duk_free(ctx, NULL);
(void) duk_gc(ctx, 0);
(void) duk_get_boolean(ctx, 0);
(void) duk_get_buffer_data(ctx, 0, NULL);
(void) duk_get_buffer(ctx, 0, NULL);
(void) duk_get_c_function(ctx, 0);
(void) duk_get_context(ctx, 0);
(void) duk_get_current_magic(ctx);
(void) duk_get_error_code(ctx, 0);
(void) duk_get_finalizer(ctx, 0);
(void) duk_get_global_string(ctx, 0);
(void) duk_get_heapptr(ctx, 0);
(void) duk_get_int(ctx, 0);
(void) duk_get_length(ctx, 0);
(void) duk_get_lstring(ctx, 0, NULL);
(void) duk_get_magic(ctx, 0);
(void) duk_get_memory_functions(ctx, NULL);
(void) duk_get_number(ctx, 0);
(void) duk_get_pointer(ctx, 0);
(void) duk_get_prop_index(ctx, 0, 0);
(void) duk_get_prop_string(ctx, 0, "dummy");
(void) duk_get_prop(ctx, 0);
(void) duk_get_prototype(ctx, 0);
(void) duk_get_string(ctx, 0);
(void) duk_get_top_index(ctx);
(void) duk_get_top(ctx);
(void) duk_get_type_mask(ctx, 0);
(void) duk_get_type(ctx, 0);
(void) duk_get_uint(ctx, 0);
(void) duk_has_prop_index(ctx, 0, 0);
(void) duk_has_prop_string(ctx, 0, "dummy");
(void) duk_has_prop(ctx, 0);
(void) duk_hex_decode(ctx, 0);
(void) duk_hex_encode(ctx, 0);
(void) duk_insert(ctx, 0);
(void) duk_instanceof(ctx, 0, 0);
(void) duk_is_array(ctx, 0);
(void) duk_is_boolean(ctx, 0);
(void) duk_is_bound_function(ctx, 0);
(void) duk_is_buffer(ctx, 0);
(void) duk_is_callable(ctx, 0);
(void) duk_is_c_function(ctx, 0);
(void) duk_is_constructor_call(ctx);
(void) duk_is_dynamic_buffer(ctx, 0);
(void) duk_is_ecmascript_function(ctx, 0);
(void) duk_is_error(ctx, 0);
(void) duk_is_eval_error(ctx, 0);
(void) duk_is_fixed_buffer(ctx, 0);
(void) duk_is_function(ctx, 0);
(void) duk_is_lightfunc(ctx, 0);
(void) duk_is_nan(ctx, 0);
(void) duk_is_null_or_undefined(ctx, 0);
(void) duk_is_null(ctx, 0);
(void) duk_is_number(ctx, 0);
(void) duk_is_object_coercible(ctx, 0);
(void) duk_is_object(ctx, 0);
(void) duk_is_pointer(ctx, 0);
(void) duk_is_primitive(ctx, 0);
(void) duk_is_range_error(ctx, 0);
(void) duk_is_reference_error(ctx, 0);
(void) duk_is_strict_call(ctx);
(void) duk_is_string(ctx, 0);
(void) duk_is_syntax_error(ctx, 0);
(void) duk_is_thread(ctx, 0);
(void) duk_is_type_error(ctx, 0);
(void) duk_is_undefined(ctx, 0);
(void) duk_is_uri_error(ctx, 0);
(void) duk_is_valid_index(ctx, 0);
(void) duk_join(ctx, 0);
(void) duk_json_decode(ctx, 0);
(void) duk_json_encode(ctx, 0);
(void) duk_load_function(ctx);
(void) duk_map_string(ctx, 0, NULL, NULL);
(void) duk_new(ctx, 0);
(void) duk_next(ctx, 0, 0);
(void) duk_normalize_index(ctx, 0);
(void) duk_pcall_method(ctx, 0);
(void) duk_pcall_prop(ctx, 0, 0);
(void) duk_pcall(ctx, 0);
(void) duk_pcompile_lstring_filename(ctx, 0, "dummy", 0);
(void) duk_pcompile_lstring(ctx, 0, "dummy", 0);
(void) duk_pcompile_string_filename(ctx, 0, "dummy");
(void) duk_pcompile_string(ctx, 0, "dummy");
(void) duk_pcompile(ctx, 0);
(void) duk_peval_lstring_noresult(ctx, "dummy", 0);
(void) duk_peval_lstring(ctx, "dummy", 0);
(void) duk_peval_noresult(ctx);
(void) duk_peval_string_noresult(ctx, "dummy");
(void) duk_peval_string(ctx, "dummy");
(void) duk_peval(ctx);
(void) duk_pnew(ctx, 0);
(void) duk_pop_2(ctx);
(void) duk_pop_3(ctx);
(void) duk_pop_n(ctx, 0);
(void) duk_pop(ctx);
(void) duk_push_array(ctx);
(void) duk_push_boolean(ctx, 0);
(void) duk_push_buffer_object(ctx, 0, 0, 0, 0);
(void) duk_push_buffer(ctx, 0, 0);
(void) duk_push_c_function(ctx, NULL, 0);
(void) duk_push_c_lightfunc(ctx, NULL, 0, 0, 0);
(void) duk_push_context_dump(ctx);
(void) duk_push_current_function(ctx);
(void) duk_push_current_thread(ctx);
(void) duk_push_dynamic_buffer(ctx, 0);
(void) duk_push_error_object_va(ctx, 0, NULL, NULL);
(void) duk_push_error_object(ctx, 0, "dummy");
(void) duk_push_external_buffer(ctx);
(void) duk_push_false(ctx);
(void) duk_push_fixed_buffer(ctx, 0);
(void) duk_push_global_object(ctx);
(void) duk_push_global_stash(ctx);
(void) duk_push_heap_stash(ctx);
(void) duk_push_heapptr(ctx, NULL);
(void) duk_push_int(ctx, 0);
(void) duk_push_lstring(ctx, "dummy", 0);
(void) duk_push_nan(ctx);
(void) duk_push_null(ctx);
(void) duk_push_number(ctx, 0.0);
(void) duk_push_object(ctx);
(void) duk_push_pointer(ctx, NULL);
(void) duk_push_sprintf(ctx, "dummy");
(void) duk_push_string(ctx, "dummy");
(void) duk_push_this(ctx);
(void) duk_push_thread_new_globalenv(ctx);
(void) duk_push_thread_stash(ctx, NULL);
(void) duk_push_thread(ctx);
(void) duk_push_true(ctx);
(void) duk_push_uint(ctx, 0);
(void) duk_push_undefined(ctx);
(void) duk_push_vsprintf(ctx, "dummy", NULL);
(void) duk_put_function_list(ctx, 0, NULL);
(void) duk_put_global_string(ctx, NULL);
(void) duk_put_number_list(ctx, 0, NULL);
(void) duk_put_prop_index(ctx, 0, 0);
(void) duk_put_prop_string(ctx, 0, "dummy");
(void) duk_put_prop(ctx, 0);
(void) duk_realloc_raw(ctx, NULL, 0);
(void) duk_realloc(ctx, NULL, 0);
(void) duk_remove(ctx, 0);
(void) duk_replace(ctx, 0);
(void) duk_require_boolean(ctx, 0);
(void) duk_require_buffer_data(ctx, 0, NULL);
(void) duk_require_buffer(ctx, 0, NULL);
(void) duk_require_c_function(ctx, 0);
(void) duk_require_callable(ctx, 0);
(void) duk_require_context(ctx, 0);
(void) duk_require_function(ctx, 0);
(void) duk_require_heapptr(ctx, 0);
(void) duk_require_int(ctx, 0);
(void) duk_require_lstring(ctx, 0, NULL);
(void) duk_require_normalize_index(ctx, 0);
(void) duk_require_null(ctx, 0);
(void) duk_require_number(ctx, 0);
(void) duk_require_object_coercible(ctx, 0);
(void) duk_require_pointer(ctx, 0);
(void) duk_require_stack_top(ctx, 0);
(void) duk_require_stack(ctx, 0);
(void) duk_require_string(ctx, 0);
(void) duk_require_top_index(ctx);
(void) duk_require_type_mask(ctx, 0, 0);
(void) duk_require_uint(ctx, 0);
(void) duk_require_undefined(ctx, 0);
(void) duk_require_valid_index(ctx, 0);
(void) duk_resize_buffer(ctx, 0, 0);
(void) duk_safe_call(ctx, NULL, NULL, 0, 0);
(void) duk_safe_to_lstring(ctx, 0, NULL);
(void) duk_safe_to_string(ctx, 0);
(void) duk_set_finalizer(ctx, 0);
(void) duk_set_global_object(ctx);
(void) duk_set_magic(ctx, 0, 0);
(void) duk_set_prototype(ctx, 0);
(void) duk_set_top(ctx, 0);
(void) duk_steal_buffer(ctx, 0, NULL);
(void) duk_strict_equals(ctx, 0, 0);
(void) duk_substring(ctx, 0, 0, 0);
(void) duk_swap_top(ctx, 0);
(void) duk_swap(ctx, 0, 0);
(void) duk_throw(ctx);
(void) duk_to_boolean(ctx, 0);
(void) duk_to_buffer(ctx, 0, NULL);
(void) duk_to_defaultvalue(ctx, 0, 0);
(void) duk_to_dynamic_buffer(ctx, 0, NULL);
(void) duk_to_fixed_buffer(ctx, 0, NULL);
(void) duk_to_int32(ctx, 0);
(void) duk_to_int(ctx, 0);
(void) duk_to_lstring(ctx, 0, NULL);
(void) duk_to_null(ctx, 0);
(void) duk_to_number(ctx, 0);
(void) duk_to_object(ctx, 0);
(void) duk_to_pointer(ctx, 0);
(void) duk_to_primitive(ctx, 0, 0);
(void) duk_to_string(ctx, 0);
(void) duk_to_uint16(ctx, 0);
(void) duk_to_uint32(ctx, 0);
(void) duk_to_uint(ctx, 0);
(void) duk_to_undefined(ctx, 0);
(void) duk_trim(ctx, 0);
(void) duk_xcopy_top(ctx, NULL, 0);
(void) duk_xmove_top(ctx, NULL, 0);
printf("never here\n"); fflush(stdout);
return 0;
}
static duk_ret_t duk__handle_require(duk_context *ctx) {
/*
* Value stack handling here is a bit sloppy but should be correct.
* Call handling will clean up any extra garbage for us.
*/
const char *id;
const char *parent_id;
duk_idx_t module_idx;
duk_idx_t stash_idx;
duk_int_t ret;
duk_push_global_stash(ctx);
stash_idx = duk_normalize_index(ctx, -1);
duk_push_current_function(ctx);
(void) duk_get_prop_string(ctx, -1, "\xff" "moduleId");
parent_id = duk_require_string(ctx, -1);
(void) parent_id; /* not used directly; suppress warning */
/* [ id stash require parent_id ] */
id = duk_require_string(ctx, 0);
(void) duk_get_prop_string(ctx, stash_idx, "\xff" "modResolve");
duk_dup(ctx, 0); /* module ID */
duk_dup(ctx, -3); /* parent ID */
duk_call(ctx, 2);
/* [ ... stash ... resolved_id ] */
id = duk_require_string(ctx, -1);
if (duk__get_cached_module(ctx, id)) {
goto have_module; /* use the cached module */
}
duk__push_module_object(ctx, id, 0 /*main*/);
duk__put_cached_module(ctx); /* module remains on stack */
/*
* From here on out, we have to be careful not to throw. If it can't be
* avoided, the error must be caught and the module removed from the
* require cache before rethrowing. This allows the application to
* reattempt loading the module.
*/
module_idx = duk_normalize_index(ctx, -1);
/* [ ... stash ... resolved_id module ] */
(void) duk_get_prop_string(ctx, stash_idx, "\xff" "modLoad");
duk_dup(ctx, -3); /* resolved ID */
(void) duk_get_prop_string(ctx, module_idx, "exports");
duk_dup(ctx, module_idx);
ret = duk_pcall(ctx, 3);
if (ret != DUK_EXEC_SUCCESS) {
duk__del_cached_module(ctx, id);
duk_throw(ctx); /* rethrow */
}
if (duk_is_string(ctx, -1)) {
duk_int_t ret;
/* [ ... module source ] */
#if DUK_VERSION >= 19999
ret = duk_safe_call(ctx, duk__eval_module_source, NULL, 2, 1);
#else
ret = duk_safe_call(ctx, duk__eval_module_source, 2, 1);
#endif
if (ret != DUK_EXEC_SUCCESS) {
duk__del_cached_module(ctx, id);
duk_throw(ctx); /* rethrow */
}
} else if (duk_is_undefined(ctx, -1)) {
duk_pop(ctx);
} else {
duk__del_cached_module(ctx, id);
duk_error(ctx, DUK_ERR_TYPE_ERROR, "invalid module load callback return value");
}
/* fall through */
have_module:
/* [ ... module ] */
(void) duk_get_prop_string(ctx, -1, "exports");
return 1;
}
static duk_ret_t duk__require(duk_context *ctx) {
const char *str_req_id; /* requested identifier */
const char *str_mod_id; /* require.id of current module */
duk_int_t pcall_rc;
/* NOTE: we try to minimize code size by avoiding unnecessary pops,
* so the stack looks a bit cluttered in this function. DUK__ASSERT_TOP()
* assertions are used to ensure stack configuration is correct at each
* step.
*/
/*
* Resolve module identifier into canonical absolute form.
*/
str_req_id = duk_require_string(ctx, DUK__IDX_REQUESTED_ID);
duk_push_current_function(ctx);
duk_get_prop_string(ctx, -1, "id");
str_mod_id = duk_get_string(ctx, DUK__IDX_REQUIRE_ID); /* ignore non-strings */
duk__resolve_module_id(ctx, str_req_id, str_mod_id);
str_req_id = NULL;
str_mod_id = NULL;
/* [ requested_id require require.id resolved_id last_comp ] */
DUK__ASSERT_TOP(ctx, DUK__IDX_LASTCOMP + 1);
/*
* Cached module check.
*
* If module has been loaded or its loading has already begun without
* finishing, return the same cached value (module.exports). The
* value is registered when module load starts so that circular
* references can be supported to some extent.
*/
duk_push_global_stash(ctx);
duk_get_prop_string(ctx, -1, "\xff" "module:Duktape");
duk_remove(ctx, -2); /* Lookup stashed, original 'Duktape' object. */
duk_get_prop_string(ctx, DUK__IDX_DUKTAPE, "modLoaded"); /* Duktape.modLoaded */
duk_require_type_mask(ctx, DUK__IDX_MODLOADED, DUK_TYPE_MASK_OBJECT);
DUK__ASSERT_TOP(ctx, DUK__IDX_MODLOADED + 1);
duk_dup(ctx, DUK__IDX_RESOLVED_ID);
if (duk_get_prop(ctx, DUK__IDX_MODLOADED)) {
/* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded Duktape.modLoaded[id] ] */
duk_get_prop_string(ctx, -1, "exports"); /* return module.exports */
return 1;
}
DUK__ASSERT_TOP(ctx, DUK__IDX_UNDEFINED + 1);
/* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined ] */
/*
* Module not loaded (and loading not started previously).
*
* Create a new require() function with 'id' set to resolved ID
* of module being loaded. Also create 'exports' and 'module'
* tables but don't register exports to the loaded table yet.
* We don't want to do that unless the user module search callbacks
* succeeds in finding the module.
*/
/* Fresh require: require.id is left configurable (but not writable)
* so that is not easy to accidentally tweak it, but it can still be
* done with Object.defineProperty().
*
* XXX: require.id could also be just made non-configurable, as there
* is no practical reason to touch it (at least from Ecmascript code).
*/
duk_push_c_function(ctx, duk__require, 1 /*nargs*/);
duk_push_string(ctx, "name");
duk_push_string(ctx, "require");
duk_def_prop(ctx, DUK__IDX_FRESH_REQUIRE, DUK_DEFPROP_HAVE_VALUE); /* not writable, not enumerable, not configurable */
duk_push_string(ctx, "id");
duk_dup(ctx, DUK__IDX_RESOLVED_ID);
duk_def_prop(ctx, DUK__IDX_FRESH_REQUIRE, DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_SET_CONFIGURABLE); /* a fresh require() with require.id = resolved target module id */
/* Module table:
* - module.exports: initial exports table (may be replaced by user)
* - module.id is non-writable and non-configurable, as the CommonJS
* spec suggests this if possible
* - module.filename: not set, defaults to resolved ID if not explicitly
* set by modSearch() (note capitalization, not .fileName, matches Node.js)
* - module.name: not set, defaults to last component of resolved ID if
* not explicitly set by modSearch()
*/
duk_push_object(ctx); /* exports */
duk_push_object(ctx); /* module */
duk_push_string(ctx, "exports");
duk_dup(ctx, DUK__IDX_EXPORTS);
duk_def_prop(ctx, DUK__IDX_MODULE, DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_SET_WRITABLE | DUK_DEFPROP_SET_CONFIGURABLE); /* module.exports = exports */
duk_push_string(ctx, "id");
duk_dup(ctx, DUK__IDX_RESOLVED_ID); /* resolved id: require(id) must return this same module */
duk_def_prop(ctx, DUK__IDX_MODULE, DUK_DEFPROP_HAVE_VALUE); /* module.id = resolved_id; not writable, not enumerable, not configurable */
duk_compact(ctx, DUK__IDX_MODULE); /* module table remains registered to modLoaded, minimize its size */
DUK__ASSERT_TOP(ctx, DUK__IDX_MODULE + 1);
/* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined fresh_require exports module ] */
/* Register the module table early to modLoaded[] so that we can
* support circular references even in modSearch(). If an error
* is thrown, we'll delete the reference.
*/
duk_dup(ctx, DUK__IDX_RESOLVED_ID);
duk_dup(ctx, DUK__IDX_MODULE);
duk_put_prop(ctx, DUK__IDX_MODLOADED); /* Duktape.modLoaded[resolved_id] = module */
/*
* Call user provided module search function and build the wrapped
* module source code (if necessary). The module search function
* can be used to implement pure Ecmacsript, pure C, and mixed
* Ecmascript/C modules.
*
* The module search function can operate on the exports table directly
* (e.g. DLL code can register values to it). It can also return a
* string which is interpreted as module source code (if a non-string
* is returned the module is assumed to be a pure C one). If a module
* cannot be found, an error must be thrown by the user callback.
*
* Because Duktape.modLoaded[] already contains the module being
* loaded, circular references for C modules should also work
* (although expected to be quite rare).
*/
duk_push_string(ctx, "(function(require,exports,module){");
/* Duktape.modSearch(resolved_id, fresh_require, exports, module). */
duk_get_prop_string(ctx, DUK__IDX_DUKTAPE, "modSearch"); /* Duktape.modSearch */
duk_dup(ctx, DUK__IDX_RESOLVED_ID);
duk_dup(ctx, DUK__IDX_FRESH_REQUIRE);
duk_dup(ctx, DUK__IDX_EXPORTS);
duk_dup(ctx, DUK__IDX_MODULE); /* [ ... Duktape.modSearch resolved_id last_comp fresh_require exports module ] */
pcall_rc = duk_pcall(ctx, 4 /*nargs*/); /* -> [ ... source ] */
DUK__ASSERT_TOP(ctx, DUK__IDX_MODULE + 3);
if (pcall_rc != DUK_EXEC_SUCCESS) {
/* Delete entry in Duktape.modLoaded[] and rethrow. */
goto delete_rethrow;
}
/* If user callback did not return source code, module loading
* is finished (user callback initialized exports table directly).
*/
if (!duk_is_string(ctx, -1)) {
/* User callback did not return source code, so module loading
* is finished: just update modLoaded with final module.exports
* and we're done.
*/
goto return_exports;
}
/* Finish the wrapped module source. Force module.filename as the
* function .fileName so it gets set for functions defined within a
* module. This also ensures loggers created within the module get
* the module ID (or overridden filename) as their default logger name.
* (Note capitalization: .filename matches Node.js while .fileName is
* used elsewhere in Duktape.)
*/
duk_push_string(ctx, "})");
duk_concat(ctx, 3);
if (!duk_get_prop_string(ctx, DUK__IDX_MODULE, "filename")) {
/* module.filename for .fileName, default to resolved ID if
* not present.
*/
duk_pop(ctx);
duk_dup(ctx, DUK__IDX_RESOLVED_ID);
}
pcall_rc = duk_pcompile(ctx, DUK_COMPILE_EVAL);
if (pcall_rc != DUK_EXEC_SUCCESS) {
goto delete_rethrow;
}
pcall_rc = duk_pcall(ctx, 0); /* -> eval'd function wrapper (not called yet) */
if (pcall_rc != DUK_EXEC_SUCCESS) {
goto delete_rethrow;
}
/* Module has now evaluated to a wrapped module function. Force its
* .name to match module.name (defaults to last component of resolved
* ID) so that it is shown in stack traces too. Note that we must not
* introduce an actual name binding into the function scope (which is
* usually the case with a named function) because it would affect the
* scope seen by the module and shadow accesses to globals of the same name.
* This is now done by compiling the function as anonymous and then forcing
* its .name without setting a "has name binding" flag.
*/
duk_push_string(ctx, "name");
if (!duk_get_prop_string(ctx, DUK__IDX_MODULE, "name")) {
/* module.name for .name, default to last component if
* not present.
*/
duk_pop(ctx);
duk_dup(ctx, DUK__IDX_LASTCOMP);
}
duk_def_prop(ctx, -3, DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_FORCE);
/*
* Call the wrapped module function.
*
* Use a protected call so that we can update Duktape.modLoaded[resolved_id]
* even if the module throws an error.
*/
/* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined fresh_require exports module mod_func ] */
DUK__ASSERT_TOP(ctx, DUK__IDX_MODULE + 2);
duk_dup(ctx, DUK__IDX_EXPORTS); /* exports (this binding) */
duk_dup(ctx, DUK__IDX_FRESH_REQUIRE); /* fresh require (argument) */
duk_get_prop_string(ctx, DUK__IDX_MODULE, "exports"); /* relookup exports from module.exports in case it was changed by modSearch */
duk_dup(ctx, DUK__IDX_MODULE); /* module (argument) */
DUK__ASSERT_TOP(ctx, DUK__IDX_MODULE + 6);
/* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined fresh_require exports module mod_func exports fresh_require exports module ] */
pcall_rc = duk_pcall_method(ctx, 3 /*nargs*/);
if (pcall_rc != DUK_EXEC_SUCCESS) {
/* Module loading failed. Node.js will forget the module
* registration so that another require() will try to load
* the module again. Mimic that behavior.
*/
goto delete_rethrow;
}
/* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined fresh_require exports module result(ignored) ] */
DUK__ASSERT_TOP(ctx, DUK__IDX_MODULE + 2);
/* fall through */
return_exports:
duk_get_prop_string(ctx, DUK__IDX_MODULE, "exports");
duk_compact(ctx, -1); /* compact the exports table */
return 1; /* return module.exports */
delete_rethrow:
duk_dup(ctx, DUK__IDX_RESOLVED_ID);
duk_del_prop(ctx, DUK__IDX_MODLOADED); /* delete Duktape.modLoaded[resolved_id] */
duk_throw(ctx); /* rethrow original error */
return 0; /* not reachable */
}
//void duk_push_current_function(duk_context *ctx);
void aperl_duk_push_current_function(duk_context *ctx) {
duk_push_current_function(ctx);
}
