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      1 /*
      2  * Copyright 2021 The OpenSSL Project Authors. All Rights Reserved.
      3  *
      4  * Licensed under the Apache License 2.0 (the "License").  You may not use
      5  * this file except in compliance with the License.  You can obtain a copy
      6  * in the file LICENSE in the source distribution or at
      7  * https://www.openssl.org/source/license.html
      8  */
      9 
     10 #ifndef OSSL_INTERNAL_UNICODE_H
     11 #define OSSL_INTERNAL_UNICODE_H
     12 #pragma once
     13 
     14 typedef enum {
     15     SURROGATE_MIN = 0xd800UL,
     16     SURROGATE_MAX = 0xdfffUL,
     17     UNICODE_MAX = 0x10ffffUL,
     18     UNICODE_LIMIT
     19 } UNICODE_CONSTANTS;
     20 
     21 static ossl_unused ossl_inline int is_unicode_surrogate(unsigned long value)
     22 {
     23     return value >= SURROGATE_MIN && value <= SURROGATE_MAX;
     24 }
     25 
     26 static ossl_unused ossl_inline int is_unicode_valid(unsigned long value)
     27 {
     28     return value <= UNICODE_MAX && !is_unicode_surrogate(value);
     29 }
     30 
     31 #endif
     32