Ignore whitespace only lines in brewing and furnace recipes (#4332)

src/BrewingRecipes.cpp

@@ -45,8 +45,9 @@ void cBrewingRecipes::ReloadRecipes(void)
 			ParsingLine.erase(FirstCommentSymbol);
 		}
 
-		if (ParsingLine.empty())
+		if (IsOnlyWhitespace(ParsingLine))
 		{
+			// Ignore empty and whitespace only lines
 			continue;
 		}
 		AddRecipeFromLine(ParsingLine, LineNum);

src/FurnaceRecipe.cpp

@@ -68,14 +68,6 @@ void cFurnaceRecipe::ReloadRecipes(void)
 	while (std::getline(f, ParsingLine))
 	{
 		LineNum++;
-		if (ParsingLine.empty())
-		{
-			// There is a problem here on Android. Text files transferred from another OS may have a newline representation Android's implementation of getline doesn't expect
-			// Thus, part of a newline may be left in ParsingLine. ::empty() thus thinks the string isn't empty, and the below code outputs interesting errors since it was passed a nearly empty string
-			// Ref: https://stackoverflow.com/questions/6089231/getting-std-ifstream-to-handle-lf-cr-and-crlf
-			// TODO: There is a solution in the above reference, but it isn't very pretty. Fix it somehow.
-			continue;
-		}
 
 		// Remove comments from the line:
 		size_t FirstCommentSymbol = ParsingLine.find('#');
@@ -84,6 +76,12 @@ void cFurnaceRecipe::ReloadRecipes(void)
 			ParsingLine.erase(ParsingLine.begin() + static_cast<const long>(FirstCommentSymbol), ParsingLine.end());
 		}
 
+		if (IsOnlyWhitespace(ParsingLine))
+		{
+			// Ignore empty and whitespace only lines
+			continue;
+		}
+
 		switch (ParsingLine[0])
 		{
 			case '#':

src/StringUtils.cpp

@@ -1071,3 +1071,11 @@ bool StringToFloat(const AString & a_String, float & a_Num)
 	return true;
 }
 
+
+
+
+
+bool IsOnlyWhitespace(const AString & a_String)
+{
+	return std::all_of(a_String.cbegin(), a_String.cend(), isspace);
+}

src/StringUtils.h

@@ -148,6 +148,9 @@ extern AString StringsConcat(const AStringVector & a_Strings, char a_Separator);
 /** Converts a string into a float. Returns false if the conversion fails. */
 extern bool StringToFloat(const AString & a_String, float & a_Num);
 
+/** Returns true if only whitespace characters are present in the string */
+bool IsOnlyWhitespace(const AString & a_String);
+