Use only US-ASCII charset when comparing stings as caseless as required by standard.

Comparisons for HTTP headers must not be affected by locale settings.

1 files changed, 62 insertions, 0 deletions

diff --git a/src/microhttpd/mhd_str.h b/src/microhttpd/mhd_str.h
new file mode 100644
index 00000000..59902e80
--- /dev/null
+++ b/src/microhttpd/mhd_str.h
@@ -0,0 +1,62 @@
+/*
+  This file is part of libmicrohttpd
+  Copyright (C) 2015 Karlson2k (Evgeny Grin)
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+/**
+ * @file microhttpd/mhd_str.h
+ * @brief  Header for string manipulating helpers
+ * @author Karlson2k (Evgeny Grin)
+ */
+
+#ifndef MHD_STR_H
+#define MHD_STR_H 1
+
+#include <stdint.h>
+
+/*
+ * Block of functions/macros that use US-ASCII charset as required by HTTP
+ * standards. Not affected by current locale settings.
+ */
+
+/**
+ * Check two string for equality, ignoring case of US-ASCII letters.
+ * @param str1 first string to compare
+ * @param str2 second string to compare
+ * @return non-zero if two strings are equal, zero otherwise.
+ */
+int
+MHD_str_equal_caseless_ (const char * str1,
+                 const char * str2);
+
+
+/**
+ * Check two string for equality, ignoring case of US-ASCII letters and
+ * checking not more than @a maxlen characters.
+ * Compares up to first terminating null character, but not more than
+ * first @a maxlen characters.
+ * @param str1 first string to compare
+ * @param str2 second string to compare
+ * @patam maxlen maximum number of characters to compare
+ * @return non-zero if two strings are equal, zero otherwise.
+ */
+int
+MHD_str_equal_caseless_n_ (const char * const str1,
+                  const char * const str2,
+                  size_t maxlen);
+
+#endif /* MHD_STR_H */