1  // Copyright 2020 Google LLC
 2  //
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 4  // modification, are permitted provided that the following conditions are
 5  // met:
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 8  // notice, this list of conditions and the following disclaimer.
 9  //     * Redistributions in binary form must reproduce the above
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28  
29  #include "encoding_util.h"
30  
31  #include <Availability.h>
32  #include <AvailabilityMacros.h>
33  #import <Foundation/Foundation.h>
34  
35  NSString* PercentEncodeNSString(NSString* key) {
36  #if (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && defined(__IPHONE_9_0) && \
37       __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_9_0) ||                  \
38      (defined(MAC_OS_X_VERSION_MIN_REQUIRED) &&                             \
39       defined(MAC_OS_X_VERSION_10_11) &&                                    \
40       MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_11)
41    return [key stringByAddingPercentEncodingWithAllowedCharacters:
42                    [NSCharacterSet URLQueryAllowedCharacterSet]];
43  #else
44    return [key stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
45  #endif
46  }