add verify_utf8

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/src/libmdsserver/util.h b/src/libmdsserver/util.h
index 23804bc..514b86d 100644
--- a/src/libmdsserver/util.h
+++ b/src/libmdsserver/util.h
@@ -124,7 +124,7 @@ int full_write(int fd, const char* buffer, size_t length);
  * 
  * @param   fd      The file descriptor
  * @param   length  Output parameter for the length of the file, may be `NULL`
- * @return          The content of the file, you will need to free it. `NULL` on error.
+ * @return          The content of the file, you will need to free it. `NULL` on error
  */
 char* full_read(int fd, size_t* length);
 
@@ -151,6 +151,15 @@ int startswith_n(const char* haystack, const char* needle, size_t haystack_n, si
  */
 pid_t uninterruptable_waitpid(pid_t pid, int* restrict status, int options);
 
+/**
+ * Check whether a NUL-terminated string is encoded in UTF-8
+ * 
+ * @param   string              The string
+ * @param   allow_modified_nul  Whether Modified UTF-8 is allowed, which allows a two-byte encoding for NUL
+ * @return                      Zero if good, -1 on encoding error
+ */
+int verify_utf8(const char* string, int allow_modified_nul) __attribute__((pure));
+
 
 #endif