add str_cmp()

include/re_fmt.h

@@ -105,6 +105,7 @@ uint8_t ch_hex(char ch);
 int  str_hex(uint8_t *hex, size_t len, const char *str);
 void str_ncpy(char *dst, const char *src, size_t n);
 int  str_dup(char **dst, const char *src);
+int  str_cmp(const char *s1, const char *s2);
 int  str_casecmp(const char *s1, const char *s2);
 size_t str_len(const char *s);
 const char *str_error(int errnum, char *buf, size_t sz);

src/fmt/str.c

@@ -94,6 +94,24 @@ int str_dup(char **dst, const char *src)
  * @return an integer less than, equal to, or greater than zero if s1 is found
  *         respectively, to be less than, to match, or be greater than s2
  */
+int str_cmp(const char *s1, const char *s2)
+{
+	if (!s1 || !s2)
+		return 1;
+
+	return strcmp(s1, s2);
+}
+
+
+/**
+ * Compare two 0-terminated strings, ignoring case
+ *
+ * @param s1 First string
+ * @param s2 Second string
+ *
+ * @return an integer less than, equal to, or greater than zero if s1 is found
+ *         respectively, to be less than, to match, or be greater than s2
+ */
 int str_casecmp(const char *s1, const char *s2)
 {
 	/* Same strings -> equal */