Codechange: Generalize StringBuilder.

src/core/string_builder.cpp

@@ -0,0 +1,125 @@
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file string_builder.cpp Implementation of string composing. */
+
+#include "../stdafx.h"
+#include "string_builder.hpp"
+#include "utf8.hpp"
+#include "../safeguards.h"
+
+/**
+ * Append binary uint8.
+ */
+void BaseStringBuilder::PutUint8(uint8_t value)
+{
+	std::array<char, 1> buf{
+		static_cast<char>(value)
+	};
+	this->PutBuffer(buf);
+}
+
+/**
+ * Append binary int8.
+ */
+void BaseStringBuilder::PutSint8(int8_t value)
+{
+	this->PutUint8(static_cast<uint8_t>(value));
+}
+
+/**
+ * Append binary uint16 using little endian.
+ */
+void BaseStringBuilder::PutUint16LE(uint16_t value)
+{
+	std::array<char, 2> buf{
+		static_cast<char>(static_cast<uint8_t>(value)),
+		static_cast<char>(static_cast<uint8_t>(value >> 8))
+	};
+	this->PutBuffer(buf);
+}
+
+/**
+ * Append binary int16 using little endian.
+ */
+void BaseStringBuilder::PutSint16LE(int16_t value)
+{
+	this->PutUint16LE(static_cast<uint16_t>(value));
+}
+
+/**
+ * Append binary uint32 using little endian.
+ */
+void BaseStringBuilder::PutUint32LE(uint32_t value)
+{
+	std::array<char, 4> buf{
+		static_cast<char>(static_cast<uint8_t>(value)),
+		static_cast<char>(static_cast<uint8_t>(value >> 8)),
+		static_cast<char>(static_cast<uint8_t>(value >> 16)),
+		static_cast<char>(static_cast<uint8_t>(value >> 24))
+	};
+	this->PutBuffer(buf);
+}
+
+/**
+ * Append binary int32 using little endian.
+ */
+void BaseStringBuilder::PutSint32LE(int32_t value)
+{
+	this->PutUint32LE(static_cast<uint32_t>(value));
+}
+
+/**
+ * Append binary uint64 using little endian.
+ */
+void BaseStringBuilder::PutUint64LE(uint64_t value)
+{
+	std::array<char, 8> buf{
+		static_cast<char>(static_cast<uint8_t>(value)),
+		static_cast<char>(static_cast<uint8_t>(value >> 8)),
+		static_cast<char>(static_cast<uint8_t>(value >> 16)),
+		static_cast<char>(static_cast<uint8_t>(value >> 24)),
+		static_cast<char>(static_cast<uint8_t>(value >> 32)),
+		static_cast<char>(static_cast<uint8_t>(value >> 40)),
+		static_cast<char>(static_cast<uint8_t>(value >> 48)),
+		static_cast<char>(static_cast<uint8_t>(value >> 56))
+	};
+	this->PutBuffer(buf);
+}
+
+/**
+ * Append binary int64 using little endian.
+ */
+void BaseStringBuilder::PutSint64LE(int64_t value)
+{
+	this->PutUint64LE(static_cast<uint64_t>(value));
+}
+
+/**
+ * Append 8-bit char.
+ */
+void BaseStringBuilder::PutChar(char c)
+{
+	this->PutUint8(static_cast<uint8_t>(c));
+}
+
+/**
+ * Append UTF.8 char.
+ */
+void BaseStringBuilder::PutUtf8(char32_t c)
+{
+	auto [buf, len] = EncodeUtf8(c);
+	this->PutBuffer(buf, len);
+}
+
+/**
+ * Append buffer.
+ */
+void StringBuilder::PutBuffer(const char *str, size_type len)
+{
+	this->dest->append(str, len);
+}