add template argument for size in StringBuffer

Until now the pre-allocated array size was defined to be 64 without
a way of adjusting it from the calling side.

This commit adds the size as a template parameter.

core/string_buffer.cpp

@@ -1,103 +0,0 @@
-/*************************************************************************/
-/*  string_buffer.cpp                                                    */
-/*************************************************************************/
-/*                       This file is part of:                           */
-/*                           GODOT ENGINE                                */
-/*                      https://godotengine.org                          */
-/*************************************************************************/
-/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
-/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
-/*                                                                       */
-/* 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_buffer.h"
-
-#include <string.h>
-
-StringBuffer &StringBuffer::append(CharType p_char) {
-	reserve(string_length + 2);
-	current_buffer_ptr()[string_length++] = p_char;
-	return *this;
-}
-
-StringBuffer &StringBuffer::append(const String &p_string) {
-	return append(p_string.c_str());
-}
-
-StringBuffer &StringBuffer::append(const char *p_str) {
-	int len = strlen(p_str);
-	reserve(string_length + len + 1);
-
-	CharType *buf = current_buffer_ptr();
-	for (const char *c_ptr = p_str; *c_ptr; ++c_ptr) {
-		buf[string_length++] = *c_ptr;
-	}
-	return *this;
-}
-
-StringBuffer &StringBuffer::append(const CharType *p_str, int p_clip_to_len) {
-	int len = 0;
-	while ((p_clip_to_len < 0 || len < p_clip_to_len) && p_str[len]) {
-		++len;
-	}
-	reserve(string_length + len + 1);
-	memcpy(&(current_buffer_ptr()[string_length]), p_str, len * sizeof(CharType));
-	string_length += len;
-
-	return *this;
-}
-
-StringBuffer &StringBuffer::reserve(int p_size) {
-	if (p_size < SHORT_BUFFER_SIZE || p_size < buffer.size())
-		return *this;
-
-	bool need_copy = string_length > 0 && buffer.empty();
-	buffer.resize(next_power_of_2(p_size));
-	if (need_copy) {
-		memcpy(buffer.ptrw(), short_buffer, string_length * sizeof(CharType));
-	}
-
-	return *this;
-}
-
-int StringBuffer::length() const {
-	return string_length;
-}
-
-String StringBuffer::as_string() {
-	current_buffer_ptr()[string_length] = '\0';
-	if (buffer.empty()) {
-		return String(short_buffer);
-	} else {
-		buffer.resize(string_length + 1);
-		return buffer;
-	}
-}
-
-double StringBuffer::as_double() {
-	current_buffer_ptr()[string_length] = '\0';
-	return String::to_double(current_buffer_ptr());
-}
-
-int64_t StringBuffer::as_int() {
-	current_buffer_ptr()[string_length] = '\0';
-	return String::to_int(current_buffer_ptr());
-}

core/string_buffer.h

@@ -32,9 +32,10 @@
 #define STRING_BUFFER_H
 
 #include "ustring.h"
+#include <string.h>
 
+template <int SHORT_BUFFER_SIZE = 64>
 class StringBuffer {
-	static const int SHORT_BUFFER_SIZE = 64;
 
 	CharType short_buffer[SHORT_BUFFER_SIZE];
 	String buffer;
@@ -80,4 +81,83 @@ public:
 	}
 };
 
+template <int SHORT_BUFFER_SIZE>
+StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::append(CharType p_char) {
+	reserve(string_length + 2);
+	current_buffer_ptr()[string_length++] = p_char;
+	return *this;
+}
+
+template <int SHORT_BUFFER_SIZE>
+StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::append(const String &p_string) {
+	return append(p_string.c_str());
+}
+
+template <int SHORT_BUFFER_SIZE>
+StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::append(const char *p_str) {
+	int len = strlen(p_str);
+	reserve(string_length + len + 1);
+
+	CharType *buf = current_buffer_ptr();
+	for (const char *c_ptr = p_str; *c_ptr; ++c_ptr) {
+		buf[string_length++] = *c_ptr;
+	}
+	return *this;
+}
+
+template <int SHORT_BUFFER_SIZE>
+StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::append(const CharType *p_str, int p_clip_to_len) {
+	int len = 0;
+	while ((p_clip_to_len < 0 || len < p_clip_to_len) && p_str[len]) {
+		++len;
+	}
+	reserve(string_length + len + 1);
+	memcpy(&(current_buffer_ptr()[string_length]), p_str, len * sizeof(CharType));
+	string_length += len;
+
+	return *this;
+}
+
+template <int SHORT_BUFFER_SIZE>
+StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::reserve(int p_size) {
+	if (p_size < SHORT_BUFFER_SIZE || p_size < buffer.size())
+		return *this;
+
+	bool need_copy = string_length > 0 && buffer.empty();
+	buffer.resize(next_power_of_2(p_size));
+	if (need_copy) {
+		memcpy(buffer.ptrw(), short_buffer, string_length * sizeof(CharType));
+	}
+
+	return *this;
+}
+
+template <int SHORT_BUFFER_SIZE>
+int StringBuffer<SHORT_BUFFER_SIZE>::length() const {
+	return string_length;
+}
+
+template <int SHORT_BUFFER_SIZE>
+String StringBuffer<SHORT_BUFFER_SIZE>::as_string() {
+	current_buffer_ptr()[string_length] = '\0';
+	if (buffer.empty()) {
+		return String(short_buffer);
+	} else {
+		buffer.resize(string_length + 1);
+		return buffer;
+	}
+}
+
+template <int SHORT_BUFFER_SIZE>
+double StringBuffer<SHORT_BUFFER_SIZE>::as_double() {
+	current_buffer_ptr()[string_length] = '\0';
+	return String::to_double(current_buffer_ptr());
+}
+
+template <int SHORT_BUFFER_SIZE>
+int64_t StringBuffer<SHORT_BUFFER_SIZE>::as_int() {
+	current_buffer_ptr()[string_length] = '\0';
+	return String::to_int(current_buffer_ptr());
+}
+
 #endif

core/variant_parser.cpp

@@ -178,7 +178,7 @@ Error VariantParser::get_token(Stream *p_stream, Token &r_token, int &line, Stri
 			};
 			case '#': {
 
-				StringBuffer color_str;
+				StringBuffer<> color_str;
 				color_str += '#';
 				while (true) {
 					CharType ch = p_stream->get_char();
@@ -299,7 +299,7 @@ Error VariantParser::get_token(Stream *p_stream, Token &r_token, int &line, Stri
 				if (cchar == '-' || (cchar >= '0' && cchar <= '9')) {
 					//a number
 
-					StringBuffer num;
+					StringBuffer<> num;
 #define READING_SIGN 0
 #define READING_INT 1
 #define READING_DEC 2
@@ -378,7 +378,7 @@ Error VariantParser::get_token(Stream *p_stream, Token &r_token, int &line, Stri
 
 				} else if ((cchar >= 'A' && cchar <= 'Z') || (cchar >= 'a' && cchar <= 'z') || cchar == '_') {
 
-					StringBuffer id;
+					StringBuffer<> id;
 					bool first = true;
 
 					while ((cchar >= 'A' && cchar <= 'Z') || (cchar >= 'a' && cchar <= 'z') || cchar == '_' || (!first && cchar >= '0' && cchar <= '9')) {