+// copy file source to file dest
+void copy_file(const char *pathSrc, const char *pathDest);
+
+// extract key = value
+int parse_line (const char *line, char **key, char **value);
+
+// conversion
+int hex_char_to_int (char c);
+int hex_to_rgb (char *hex, int *r, int *g, int *b);
+void get_color (char *hex, double *rgb);
+