jnlib/

* stringhelp.c (utf8_charcount): New.
agent/
	* genkey.c (check_passphrase_constraints): Use UTF-8 aware strlen.

TODO

@@ -120,6 +120,4 @@
   There is at least one couple of duplicate files: inttype[_-]h.m4.
 
 * UTF-8
-** we need a function to count characters.
+  UTF-8 specific TODO.
-  Something like utf8_strlen.  This is needed to correclty count the
-  lengtgh of a passphrase.

agent/ChangeLog

@@ -1,9 +1,10 @@
 2007-01-25  Werner Koch  <wk@g10code.com>
 
-	* genkey.c (check_passphrase_constraints): Get ngettext call right.
+	* genkey.c (check_passphrase_constraints): Get ngettext call right
+	and use UTF-8 aware strlen.
 
 	* protect-tool.c (get_passphrase): New arg OPT_CHECK.
-	(get_new_passphrase): Enable OTP_CHECK on the first call.
+	(get_new_passphrase): Enable OPT_CHECK on the first call.
 	* command.c (cmd_get_passphrase): Implement option --check.
 
 2007-01-24  Werner Koch  <wk@g10code.com>

agent/genkey.c

@@ -84,7 +84,7 @@ check_passphrase_constraints (ctrl_t ctrl, const char *pw)
   if (!pw)
     pw = "";
 
-  if (strlen (pw) < minlen ) /* FIXME:  should be an utf-8 length. */
+  if (utf8_charcount (pw) < minlen ) 
     {
       char *desc = xtryasprintf 
         ( ngettext ("Warning:  You have entered a passphrase that%%0A"

jnlib/ChangeLog

@@ -1,3 +1,7 @@
+2007-01-25  Werner Koch  <wk@g10code.com>
+
+	* stringhelp.c (utf8_charcount): New.
+
 2006-11-29  Werner Koch  <wk@g10code.com>
 
 	* utf8conv.c (set_native_charset) [HAVE_W32_SYSTEM]: Fixed typo in

jnlib/stringhelp.c

@@ -547,6 +547,23 @@ sanitize_buffer (const void *p_arg, size_t n, int delim)
 }
 
 
+/* Given a string containing an UTF-8 encoded text, return the number
+   of characters in this string.  It differs from strlen in that it
+   only counts complete UTF-8 characters.  Note, that this function
+   does not take combined characters into account.  */
+size_t
+utf8_charcount (const char *s)
+{
+  size_t n;
+
+  for (n=0; *s; s++)
+    if ( (*s&0xc0) != 0x80 ) /* Exclude continuation bytes: 10xxxxxx */
+      n++;
+
+  return n;
+}
+
+
 /****************************************************
  **********  W32 specific functions  ****************
  ****************************************************/

jnlib/stringhelp.h

@@ -57,6 +57,9 @@ size_t print_sanitized_utf8_string (FILE *fp, const char *string, int delim);
 char *sanitize_buffer (const void *p, size_t n, int delim);
 
 
+size_t utf8_charcount (const char *s);
+
+
 #ifdef HAVE_W32_SYSTEM
 const char *w32_strerror (int ec);
 #endif