UTF8

- Merged libexpr changes.

src/utf8.cpp

@@ -1,7 +1,6 @@
 ////////////////////////////////////////////////////////////////////////////////
-// taskwarrior - a command line task list manager.
 //
-// Copyright 2006-2013, Paul Beckingham, Federico Hernandez.
+// Copyright 2013 - 2014, Paul Beckingham, Federico Hernandez.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
@@ -25,6 +24,7 @@
 //
 ////////////////////////////////////////////////////////////////////////////////
 
+#include <cmake.h>
 #include <string>
 #include <text.h>
 #include <utf8.h>
@@ -78,6 +78,9 @@ unsigned int utf8_codepoint (const std::string& input)
 //   - returns the next character
 unsigned int utf8_next_char (const std::string& input, std::string::size_type& i)
 {
+  if (input[i] == '\0')
+    return 0;
+
   // How many bytes in the sequence?
   int length = utf8_sequence (input[i]);
 

src/utf8.h

@@ -1,7 +1,6 @@
 ////////////////////////////////////////////////////////////////////////////////
-// taskwarrior - a command line task list manager.
 //
-// Copyright 2006-2013, Paul Beckingham, Federico Hernandez.
+// Copyright 2013 - 2014, Paul Beckingham, Federico Hernandez.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
@@ -40,6 +39,7 @@ unsigned int utf8_width (const std::string& str);
 unsigned int utf8_text_width (const std::string&);
 const std::string utf8_substr (const std::string&, unsigned int, unsigned int length = 0);
 
+int mk_wcwidth (wchar_t);
 
 #endif
 ////////////////////////////////////////////////////////////////////////////////

test/utf8.t.cpp

@@ -1,7 +1,6 @@
 ////////////////////////////////////////////////////////////////////////////////
-// taskwarrior - a command line task list manager.
 //
-// Copyright 2006-2013, Paul Beckingham, Federico Hernandez.
+// Copyright 2006 - 2014, Paul Beckingham, Federico Hernandez.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
@@ -25,7 +24,9 @@
 //
 ////////////////////////////////////////////////////////////////////////////////
 
+#include <cmake.h>
 #include <iostream>
+#include <stdlib.h>
 #include <utf8.h>
 #include <test.h>
 
@@ -34,6 +35,10 @@ int main (int argc, char** argv)
 {
   UnitTest t (17);
 
+  // Ensure environment has no influence.
+  unsetenv ("TASKDATA");
+  unsetenv ("TASKRC");
+
   std::string ascii_text      = "This is a test";
   std::string utf8_text       = "más sábado miércoles";
   std::string utf8_wide_text  = "改变各种颜色";