// Copyright (c) 2019, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
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// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef util_h
#define util_h

#import <Foundation/Foundation.h>

// As -[NSString stringByAddingPercentEscapesUsingEncoding:] has been
// deprecated with iOS 9.0 / OS X 10.11 SDKs, this function re-implements it
// using -[NSString stringByAddingPercentEncodingWithAllowedCharacters:] when
// using those SDKs.
static NSString *PercentEncodeNSString(NSString *key) {
#if (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && defined(__IPHONE_9_0) &&     \
__IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_9_0) ||                      \
(defined(MAC_OS_X_VERSION_MIN_REQUIRED) &&                                 \
defined(MAC_OS_X_VERSION_10_11) &&                                        \
MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_11)
  return [key stringByAddingPercentEncodingWithAllowedCharacters:
          [NSCharacterSet URLQueryAllowedCharacterSet]];
#else
  return [key stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
#endif
}

#endif /* util_h */