From 98148a5575db1f552cf0d26a87945f6b3c6de1ed Mon Sep 17 00:00:00 2001
From: Tomasz Sowa <t.sowa@ttmath.org>
Date: Thu, 5 Dec 2024 17:49:32 +0100
Subject: [PATCH] add a Stream::new_empty() method

---
 src/log/log.cpp             | 6 ++++++
 src/log/log.h               | 2 ++
 src/textstream/stream.h     | 4 ++++
 src/textstream/textstream.h | 8 +++++++-
 4 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/log/log.cpp b/src/log/log.cpp
index af5ed8f..2f40e91 100644
--- a/src/log/log.cpp
+++ b/src/log/log.cpp
@@ -79,6 +79,12 @@ bool Log::is_wchar_stream() const
 }
 
 
+Log * Log::new_empty() const
+{
+	return new Log();
+}
+
+
 
 void Log::clear()
 {
diff --git a/src/log/log.h b/src/log/log.h
index 13cae96..1d93948 100644
--- a/src/log/log.h
+++ b/src/log/log.h
@@ -77,6 +77,8 @@ public:
 	bool is_char_stream() const;
 	bool is_wchar_stream() const;
 
+	Log * new_empty() const;
+
 	void   clear();
 	bool   empty() const;
 	size_t size() const;
diff --git a/src/textstream/stream.h b/src/textstream/stream.h
index 69dd17f..a1bd4b8 100644
--- a/src/textstream/stream.h
+++ b/src/textstream/stream.h
@@ -61,6 +61,8 @@ public:
 
 	virtual ~Stream() {};
 
+	virtual Stream * new_empty() const = 0;
+
 	virtual bool is_char_stream() const = 0;
 	virtual bool is_wchar_stream() const = 0;
 
@@ -79,6 +81,8 @@ public:
 	virtual char get_char(size_t index) const = 0;
 	virtual wchar_t get_wchar(size_t index) const = 0;
 
+	virtual void escape_input(bool) {};
+
 	virtual Stream & operator<<(const char * str) = 0;
 	virtual Stream & operator<<(const std::string & str) = 0;
 	virtual Stream & operator<<(const wchar_t * str) = 0;
diff --git a/src/textstream/textstream.h b/src/textstream/textstream.h
index f49a4e5..764d369 100644
--- a/src/textstream/textstream.h
+++ b/src/textstream/textstream.h
@@ -136,6 +136,8 @@ public:
 	bool is_char_stream() const;
 	bool is_wchar_stream() const;
 
+	TextStreamBase * new_empty() const;
+
 	void   clear();
 	bool   empty() const;
 	size_t size() const;
@@ -540,7 +542,11 @@ bool TextStreamBase<char_type, stack_size, heap_block_size>::is_wchar_stream() c
 }
 
 
-
+template<typename char_type, size_t stack_size, size_t heap_block_size>
+TextStreamBase<char_type, stack_size, heap_block_size> * TextStreamBase<char_type, stack_size, heap_block_size>::new_empty() const
+{
+	return new TextStreamBase<char_type, stack_size, heap_block_size>();
+}
 
 
 template<typename char_type, size_t stack_size, size_t heap_block_size>