add Log::put_multiline() methods

src/log/log.cpp

@@ -5,7 +5,7 @@
  */
 
 /*
- * Copyright (c) 2018-2021, Tomasz Sowa
+ * Copyright (c) 2018-2022, Tomasz Sowa
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -684,5 +684,51 @@ void Log::save_log()
 }
 
 
+
+Log & Log::put_multiline(const char * prefix, const char * msg)
+{
+	put_multiline_generic(prefix, msg);
+	return *this;
+}
+
+
+Log & Log::put_multiline(const wchar_t * prefix, const wchar_t * msg)
+{
+	put_multiline_generic(prefix, msg);
+	return *this;
+}
+
+
+Log & Log::put_multiline(const char * prefix, const std::string & msg)
+{
+	put_multiline_generic(prefix, msg.c_str());
+	return *this;
+}
+
+
+Log & Log::put_multiline(const wchar_t * prefix, const std::wstring & msg)
+{
+	put_multiline_generic(prefix, msg.c_str());
+	return *this;
+}
+
+
+Log & Log::put_multiline(const std::string & prefix, const std::string & msg)
+{
+	put_multiline_generic(prefix.c_str(), msg.c_str());
+	return *this;
+}
+
+
+Log & Log::put_multiline(const std::wstring & prefix, const std::wstring & msg)
+{
+	put_multiline_generic(prefix.c_str(), msg.c_str());
+	return *this;
+}
+
+
+
+
+
 } // namespace
 

src/log/log.h

@@ -5,7 +5,7 @@
  */
 
 /*
- * Copyright (c) 2018-2021, Tomasz Sowa
+ * Copyright (c) 2018-2022, Tomasz Sowa
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -156,6 +156,17 @@ public:
 	virtual Log & put_binary_blob(const char * blob, size_t blob_len);
 	virtual Log & put_binary_blob(const std::string & blob);
 
+	/*
+	 * put multiline message
+	 * first and last new characters are trimmed
+	 * at the beginning of each line a prefix is inserted
+	 */
+	virtual Log & put_multiline(const char * prefix, 		const char * msg);
+	virtual Log & put_multiline(const wchar_t * prefix, 	const wchar_t * msg);
+	virtual Log & put_multiline(const char * prefix, 		const std::string & msg);
+	virtual Log & put_multiline(const wchar_t * prefix, 	const std::wstring & msg);
+	virtual Log & put_multiline(const std::string & prefix, const std::string & msg);
+	virtual Log & put_multiline(const std::wstring & prefix, const std::wstring & msg);
 
 
 protected:
@@ -184,6 +195,10 @@ protected:
 	virtual void save_log();
 	virtual void save_log_and_clear();
 
+	template<typename CharType>
+	void put_multiline_generic(const CharType * prefix, const CharType * msg);
+
+
 };
 
 
@@ -221,11 +236,61 @@ Log & Log::log_string_generic(const StringType & value, size_t max_size)
 
 
 
+template<typename CharType>
+void Log::put_multiline_generic(const CharType * prefix, const CharType * msg)
+{
+	bool put_prefix = true;
+	bool was_new_line = false;
+	bool was_something_printed = false;
+
+	while( *msg )
+	{
+		if( static_cast<CharType>(*msg) == static_cast<CharType>('\n') )
+		{
+			was_new_line = true;
+			put_prefix = true;
+		}
+		else
+		{
+			if( was_new_line )
+			{
+				if( was_something_printed )
+				{
+					operator<<(logend);
+				}
+
+				was_new_line = false;
+			}
+
+			if( put_prefix )
+			{
+				operator<<(prefix);
+				put_prefix = false;
+			}
+
+			operator<<(*msg);
+			was_something_printed = true;
+		}
+
+		msg += 1;
+	}
+
+	if( was_something_printed )
+	{
+		operator<<(logend);
+	}
+}
+
+
 
 
 } // namespace
 
 
+
+
+
+
 #endif