path: Add p11_path_canon() function

Cleans up a filename with readable characters.

3 files changed, 34 insertions, 0 deletions

diff --git a/common/path.c b/common/path.c
index 8362765..89d9a67 100644
--- a/common/path.c
+++ b/common/path.c
@@ -315,3 +315,18 @@ p11_path_prefix (const char *string,
 	       strncmp (string, prefix, b) == 0 &&
 	       is_path_component_or_null (string[b]);
 }
+
+void
+p11_path_canon (char *name)
+{
+	static const char *VALID =
+		"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_";
+	int i;
+
+	return_if_fail (name != NULL);
+
+	for (i = 0; name[i] != '\0'; i++) {
+		if (strchr (VALID, name[i]) == NULL)
+			name[i] = '_';
+	}
+}
diff --git a/common/path.h b/common/path.h
index cd135cb..0b19a5d 100644
--- a/common/path.h
+++ b/common/path.h
@@ -64,4 +64,6 @@ char *       p11_path_parent    (const char *path);
 bool         p11_path_prefix    (const char *string,
                                  const char *prefix);
 
+void         p11_path_canon     (char *name);
+
 #endif /* P11_PATH_H__ */
diff --git a/common/tests/test-path.c b/common/tests/test-path.c
index 1671381..1f85dbb 100644
--- a/common/tests/test-path.c
+++ b/common/tests/test-path.c
@@ -201,6 +201,22 @@ test_prefix (void)
 	assert (p11_path_prefix ("/test//other//second", "/test"));
 }
 
+static void
+test_canon (void)
+{
+	char *test;
+
+	test = strdup ("2309haonutb;AOE@#$O ");
+	p11_path_canon (test);
+	assert_str_eq (test, "2309haonutb_AOE___O_");
+	free (test);
+
+	test = strdup ("22@# %ATI@#$onot");
+	p11_path_canon (test);
+	assert_str_eq (test, "22____ATI___onot");
+	free (test);
+}
+
 int
 main (int argc,
       char *argv[])
@@ -211,6 +227,7 @@ main (int argc,
 	p11_test (test_absolute, "/path/absolute");
 	p11_test (test_parent, "/path/parent");
 	p11_test (test_prefix, "/path/prefix");
+	p11_test (test_canon, "/path/canon");
 
 	return p11_test_run (argc, argv);
 }