Helpers

- Implemented longestLine, which finds the longest line in a string.

src/text.cpp

@@ -283,6 +283,33 @@ int longestWord (const std::string& input)
   return longest;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+int longestLine (const std::string& input)
+{
+  int longest = 0;
+  int length = 0;
+  std::string::size_type i = 0;
+  int character;
+
+  while ((character = utf8_next_char (input, i)))
+  {
+    if (character == '\n')
+    {
+      if (length > longest)
+        longest = length;
+
+      length = 0;
+    }
+    else
+      ++length;
+  }
+
+  if (length > longest)
+    longest = length;
+
+  return longest;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 void extractLine (std::string& text, std::string& line, int length)
 {

src/text.h

@@ -39,6 +39,7 @@ std::string trimRight (const std::string& in, const std::string& t = " ");
 std::string trim (const std::string& in, const std::string& t = " ");
 std::string unquoteText (const std::string&);
 int longestWord (const std::string&);
+int longestLine (const std::string&);
 void extractLine (std::string&, std::string&, int);
 void splitq (std::vector<std::string>&, const std::string&, const char);
 void split (std::vector<std::string>&, const std::string&, const char);

test/text.t.cpp

@@ -35,7 +35,7 @@ Context context;
 ////////////////////////////////////////////////////////////////////////////////
 int main (int argc, char** argv)
 {
-  UnitTest t (255);
+  UnitTest t (258);
 
   // void wrapText (std::vector <std::string>& lines, const std::string& text, const int width)
   std::string text = "This is a test of the line wrapping code.";
@@ -255,6 +255,11 @@ int main (int argc, char** argv)
   t.is (longestWord ("this is a better test"),  6, "longestWord (this is a better test) --> 6");
   t.is (longestWord ("house Çirçös clown"),     6, "longestWord (Çirçös) --> 6");
 
+  // int longestLine (const std::string&)
+  t.is (longestLine ("one two three four"),    18, "longestLine (one two three four) --> 18");
+  t.is (longestLine ("one\ntwo three four"),   14, "longestLine (one\\ntwo three four) --> 14");
+  t.is (longestLine ("one\ntwo\nthree\nfour"),  5, "longestLine (one\\ntwo\\nthree\\nfour) --> 5");
+
   // std::string commify (const std::string& data)
   t.is (commify (""),           "",              "commify '' -> ''");
   t.is (commify ("1"),          "1",             "commify '1' -> '1'");