fix fullpath/dir() with extension-less files

src/chuck_main.cpp

@@ -284,7 +284,7 @@ static void usage()
 #else
   extern "C" int chuck_main( int argc, const char ** argv )
 #endif
-{
+{    
     Chuck_Compiler * compiler = NULL;
     Chuck_VM * vm = NULL;
     Chuck_VM_Code * code = NULL;

src/util_string.cpp

@@ -399,6 +399,10 @@ std::string get_full_path( const std::string & fp )
 
     char * result = realpath(fp.c_str(), buf);
 
+    // try with .ck extension
+    if(result == NULL && !str_endsin(fp.c_str(), ".ck"))
+        result = realpath((fp + ".ck").c_str(), buf);
+
     if(result == NULL)
         return fp;
     else
@@ -410,6 +414,10 @@ std::string get_full_path( const std::string & fp )
 
 	DWORD result = GetFullPathName(fp.c_str(), MAX_PATH, buf, NULL);
 
+    // try with .ck extension
+    if(result == 0 && !str_endsin(fp.c_str(), ".ck"))
+        result = GetFullPathName((fp + ".ck").c_str(), MAX_PATH, buf, NULL);
+
 	if(result == 0)
 		return fp;
 	else
@@ -539,3 +547,11 @@ std::string normalize_directory_separator(const std::string &filepath)
     return std::string(filepath);
 #endif // __PLATFORM_WIN32__
 }
+
+int str_endsin(const char *str, const char *end)
+{
+    size_t len = strlen(str);
+    size_t endlen = strlen(end);
+
+    return strncmp(str+(len-endlen), end, endlen) == 0;
+}

src/util_string.h

@@ -73,6 +73,10 @@ std::string extract_filepath_dir(std::string &filepath);
 // convert \ to / (on Windows)
 std::string normalize_directory_separator(const std::string &filepath);
 
+// determine if the last characters of str match end exactly
+// e.g. to test file extension
+int str_endsin(const char *str, const char *end);
+
 //-----------------------------------------------------------------------------
 // name: parse_path_list()
 // desc: split "x:y:z"-style path list into {"x","y","z"}