New modules 'unistr/u8-startswith', 'unistr/u16-startswith', 'unistr/u32-startswith'.

[gnulib.git] / lib / unistr / u-startswith.h

diff --git a/lib/unistr/u-startswith.h b/lib/unistr/u-startswith.h
new file mode 100644 (file)
index 0000000..131255c
--- /dev/null
+++ b/lib/unistr/u-startswith.h
@@ -0,0 +1,32 @@
+/* Substring test for UTF-8/UTF-16/UTF-32 strings.
+   Copyright (C) 2002, 2006 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This program is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Library General Public License as published
+   by the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+   USA.  */
+
+bool
+FUNC (const UNIT *str, const UNIT *prefix)
+{
+  for (;;)
+    {
+      UNIT uc1 = *str++;
+      UNIT uc2 = *prefix++;
+      if (uc2 == 0)
+       return true;
+      if (uc1 != uc2)
+       return false;
+    }
+}