#17 fixed relative path generation with root path

CMakeLists.txt

@@ -185,6 +185,8 @@ if(ENABLE_TESTS)
   create_test(DEFAULT relative skip_all)
   create_test(DEFAULT relative different_roots)
   create_test(DEFAULT relative check)
+  create_test(DEFAULT relative root_path_unix)
+  create_test(DEFAULT relative root_path_windows)
   create_test(DEFAULT root absolute)
   create_test(DEFAULT root unc)
   create_test(DEFAULT root device_unc)

src/cwalk.c

@@ -184,10 +184,13 @@ static bool cwk_path_get_first_segment_without_root(const char *path,
   // why this has to be done first.
   segment->path = path;
   segment->segments = segments;
+  segment->begin = segments;
+  segment->end = segments;
 
   // Now let's check whether this is an empty string. An empty string has no
   // segment it could use.
   if (*segments == '\0') {
+    segment->size = 0;
     return false;
   }
 
@@ -197,6 +200,7 @@ static bool cwk_path_get_first_segment_without_root(const char *path,
   while (cwk_path_is_separator(segments)) {
     ++segments;
     if (*segments == '\0') {
+      segment->size = 0;
       return false;
     }
   }

test/relative_test.c

@@ -225,6 +225,46 @@ int relative_relative()
   return EXIT_SUCCESS;
 }
 
+int relative_root_path_unix()
+{
+  char result[FILENAME_MAX];
+  size_t length;
+
+  cwk_path_set_style(CWK_STYLE_UNIX);
+
+  length = cwk_path_get_relative("/this/is/path_one", "/", result,
+                                 sizeof(result));
+  if (length != 8) {
+    return EXIT_FAILURE;
+  }
+
+  if (strcmp(result, "../../..") != 0) {
+    return EXIT_FAILURE;
+  }
+
+  return EXIT_SUCCESS;
+}
+
+int relative_root_path_windows()
+{
+  char result[FILENAME_MAX];
+  size_t length;
+
+  cwk_path_set_style(CWK_STYLE_WINDOWS);
+
+  length = cwk_path_get_relative("C:\\this\\is\\path_one", "C:\\", result,
+                                 sizeof(result));
+  if (length != 8) {
+    return EXIT_FAILURE;
+  }
+
+  if (strcmp(result, "..\\..\\..") != 0) {
+    return EXIT_FAILURE;
+  }
+
+  return EXIT_SUCCESS;
+}
+
 int relative_simple()
 {
   char result[FILENAME_MAX];