added a relative function

include/cwalk.h

@@ -118,13 +118,24 @@ void cwk_path_get_root(const char *path, size_t *length);
  * @brief Determine whether the path is absolute or not.
  *
  * This function checks whether the path is an absolute path or not. A path is
- * considered to be absolute if it has a root.
+ * considered to be absolute if the root ends with a separator.
  *
  * @param path The path which will be checked.
  * @return Returns true if the path is absolute or false otherwise.
  */
 bool cwk_path_is_absolute(const char *path);
 
+/**
+ * @brief Determine whether the path is relative or not.
+ *
+ * This function checks whether the path is a relative path or not. A path is
+ * considered to be relative if the root does not end with a separator.
+ *
+ * @param path The path which will be checked.
+ * @return Returns true if the path is relative or false otherwise.
+ */
+bool cwk_path_is_relative(const char *path);
+
 /**
  * @brief Gets the basename from a file path.
  *

src/path.c

@@ -382,6 +382,12 @@ bool cwk_path_is_absolute(const char *path)
   return cwk_path_is_separator(&path[length - 1]);
 }
 
+bool cwk_path_is_relative(const char *path)
+{
+  // The path is relative if it is not absolute.
+  return !cwk_path_is_absolute(path);
+}
+
 void cwk_path_get_basename(const char *path, const char **basename,
   size_t *length)
 {
@@ -642,7 +648,6 @@ bool cwk_path_get_next_segment(struct cwk_segment *segment)
   // Tell the caller that we found a segment.
   return true;
 }
-
 bool cwk_path_get_previous_segment(struct cwk_segment *segment)
 {
   const char *c;
@@ -673,6 +678,7 @@ bool cwk_path_get_previous_segment(struct cwk_segment *segment)
 
   return true;
 }
+
 enum cwk_segment_type cwk_path_get_segment_type(
   const struct cwk_segment *segment)
 {
@@ -716,4 +722,4 @@ enum cwk_path_style cwk_path_get_style(void)
 {
   // Simply return the path style which we store in a global variable.
   return path_style;
-}
+}