lstat_cache(): print a warning if doing ping-pong between cache types

diff --git a/utf8.c b/utf8.c
index dc3735364f85273c2a119b994ddb405c09dc395c..ddfdc5e2b88d346886f64e39a93ced85cc10a78e 100644 (file)
--- a/utf8.c
+++ b/utf8.c
@@ -246,6 +246,25 @@ int utf8_width(const char **start, size_t *remainder_p)
        return git_wcwidth(ch);
 }
 
+/*
+ * Returns the total number of columns required by a null-terminated
+ * string, assuming that the string is utf8.  Returns strlen() instead
+ * if the string does not look like a valid utf8 string.
+ */
+int utf8_strwidth(const char *string)
+{
+       int width = 0;
+       const char *orig = string;
+
+       while (1) {
+               if (!string)
+                       return strlen(orig);
+               if (!*string)
+                       return width;
+               width += utf8_width(&string, NULL);
+       }
+}
+
 int is_utf8(const char *text)
 {
        while (*text) {