Rework the public API (#4829)

Related to #4186.

Some notable changes:
  - The term 'Error' now strictly refers to native Error objects defined in
    the ECMA standard, which are ordinary objects. All other uses of
    'error' or 'error reference' where the term refers to a thrown value is
    now called 'exception'.

  - Simplified the naming scheme of many String API functions. These functions
    will now also take an 'encoding' argument to specify the desired
    encoding in which to operate.

  - Removed the substring-copy-to-buffer functions. These functions
    behaved awkwardly, as they use character index to specify the
    start/end positions, and were mostly used incorrectly with byte
    offsets instead. The functionality can still be replicated with
    other functions if necessary.

  - String-to-buffer functions will no longer fail if the buffer is not
    sufficiently large, the string will instead be cropped.

  - Fixed the usage of the '_sz' prefix in many API functions. The term
    'sz' means zero-terminated string in hungarian notation, this was
    used incorrectly in many cases.

  - Renamed most of the public API functions to have shorter, more on-point
    names, rather than the often too long descriptive names. Functions are now
    also grouped by the type of value they operate on, where this makes
    sense.

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai@inf.u-szeged.hu

tests/unit-ext/module/jerry-module-test.c

@@ -80,13 +80,13 @@ const char eval_string7[] = "(function() {"
 static bool
 resolve_differently_handled_module (const jerry_value_t name, jerry_value_t *result)
 {
-  jerry_size_t name_size = jerry_get_utf8_string_size (name);
+  jerry_size_t name_size = jerry_string_size (name, JERRY_ENCODING_UTF8);
   JERRY_VLA (jerry_char_t, name_string, name_size);
-  jerry_string_to_utf8_char_buffer (name, name_string, name_size);
+  jerry_string_to_buffer (name, JERRY_ENCODING_UTF8, name_string, name_size);
 
   if (!strncmp ((char *) name_string, "differently-handled-module", name_size))
   {
-    (*result) = jerry_create_number (29);
+    (*result) = jerry_number (29);
     return true;
   }
   return false;
@@ -102,13 +102,13 @@ static jerryx_module_resolver_t differently_handled_module_resolver = { NULL, re
 static bool
 cache_check (const jerry_value_t name, jerry_value_t *result)
 {
-  jerry_size_t name_size = jerry_get_utf8_string_size (name);
+  jerry_size_t name_size = jerry_string_size (name, JERRY_ENCODING_UTF8);
   JERRY_VLA (jerry_char_t, name_string, name_size);
-  jerry_string_to_utf8_char_buffer (name, name_string, name_size);
+  jerry_string_to_buffer (name, JERRY_ENCODING_UTF8, name_string, name_size);
 
   if (!strncmp ((char *) name_string, "cache-check", name_size))
   {
-    (*result) = jerry_create_object ();
+    (*result) = jerry_object ();
     return true;
   }
   return false;
@@ -151,8 +151,8 @@ handle_require (const jerry_call_info_t *call_info_p, const jerry_value_t args_p
 static void
 assert_number (jerry_value_t js_value, double expected_result)
 {
-  TEST_ASSERT (!jerry_value_is_error (js_value));
-  TEST_ASSERT (jerry_get_number_value (js_value) == expected_result);
+  TEST_ASSERT (!jerry_value_is_exception (js_value));
+  TEST_ASSERT (jerry_value_as_number (js_value) == expected_result);
 } /* assert_number */
 
 static void
@@ -161,7 +161,7 @@ eval_one (const char *the_string, double expected_result)
   jerry_value_t js_eval_result =
     jerry_eval ((const jerry_char_t *) the_string, strlen (the_string), JERRY_PARSE_STRICT_MODE);
   assert_number (js_eval_result, expected_result);
-  jerry_release_value (js_eval_result);
+  jerry_value_free (js_eval_result);
 } /* eval_one */
 
 #ifndef ENABLE_INIT_FINI
@@ -184,27 +184,27 @@ main (int argc, char **argv)
 
   jerry_init (JERRY_INIT_EMPTY);
 
-  js_global = jerry_get_global_object ();
+  js_global = jerry_current_realm ();
 
-  js_function = jerry_create_external_function (handle_require);
-  js_property_name = jerry_create_string ((const jerry_char_t *) "require");
-  res = jerry_set_property (js_global, js_property_name, js_function);
-  TEST_ASSERT (!jerry_value_is_error (res));
+  js_function = jerry_function_external (handle_require);
+  js_property_name = jerry_string_sz ("require");
+  res = jerry_object_set (js_global, js_property_name, js_function);
+  TEST_ASSERT (!jerry_value_is_exception (res));
   TEST_ASSERT (jerry_value_is_boolean (res) && jerry_value_is_true (res));
-  jerry_release_value (res);
-  jerry_release_value (js_property_name);
-  jerry_release_value (js_function);
+  jerry_value_free (res);
+  jerry_value_free (js_property_name);
+  jerry_value_free (js_function);
 
-  js_function = jerry_create_external_function (handle_clear_require_cache);
-  js_property_name = jerry_create_string ((const jerry_char_t *) "clear_require_cache");
-  res = jerry_set_property (js_global, js_property_name, js_function);
-  TEST_ASSERT (!jerry_value_is_error (res));
+  js_function = jerry_function_external (handle_clear_require_cache);
+  js_property_name = jerry_string_sz ("clear_require_cache");
+  res = jerry_object_set (js_global, js_property_name, js_function);
+  TEST_ASSERT (!jerry_value_is_exception (res));
   TEST_ASSERT (jerry_value_is_boolean (res) && jerry_value_is_true (res));
-  jerry_release_value (res);
-  jerry_release_value (js_property_name);
-  jerry_release_value (js_function);
+  jerry_value_free (res);
+  jerry_value_free (js_property_name);
+  jerry_value_free (js_function);
 
-  jerry_release_value (js_global);
+  jerry_value_free (js_global);
 
   eval_one (eval_string1, 42);
   eval_one (eval_string2, 29);

tests/unit-ext/module/my-custom-module.c

@@ -22,7 +22,7 @@
 static jerry_value_t
 my_custom_module_on_resolve (void)
 {
-  return jerry_create_number (42);
+  return jerry_number (42);
 } /* my_custom_module_on_resolve */
 
 JERRYX_NATIVE_MODULE (MODULE_NAME, my_custom_module_on_resolve)