initial commit, 4.5 stable

core/string/string_builder.cpp

@@ -0,0 +1,98 @@
+/**************************************************************************/
+/*  string_builder.cpp                                                    */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#include "string_builder.h"
+
+StringBuilder &StringBuilder::append(const String &p_string) {
+	if (p_string.is_empty()) {
+		return *this;
+	}
+
+	strings.push_back(p_string);
+	appended_strings.push_back(-1);
+
+	string_length += p_string.length();
+
+	return *this;
+}
+
+StringBuilder &StringBuilder::append(const char *p_cstring) {
+	int32_t len = strlen(p_cstring);
+
+	c_strings.push_back(p_cstring);
+	appended_strings.push_back(len);
+
+	string_length += len;
+
+	return *this;
+}
+
+String StringBuilder::as_string() const {
+	if (string_length == 0) {
+		return "";
+	}
+
+	String string;
+	string.resize_uninitialized(string_length + 1);
+	char32_t *buffer = string.ptrw();
+
+	int current_position = 0;
+
+	int godot_string_elem = 0;
+	int c_string_elem = 0;
+
+	for (uint32_t i = 0; i < appended_strings.size(); i++) {
+		const int32_t str_len = appended_strings[i];
+
+		if (str_len == -1) {
+			// Godot string
+			const String &s = strings[godot_string_elem];
+
+			memcpy(buffer + current_position, s.ptr(), s.length() * sizeof(char32_t));
+
+			current_position += s.length();
+
+			godot_string_elem++;
+		} else {
+			const char *s = c_strings[c_string_elem];
+
+			for (int32_t j = 0; j < str_len; j++) {
+				buffer[current_position + j] = s[j];
+			}
+
+			current_position += str_len;
+
+			c_string_elem++;
+		}
+	}
+	buffer[current_position] = 0;
+
+	return string;
+}