2 * Copyright 2017-2022 The OpenSSL Project Authors. All Rights Reserved.
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
11 * This version of ctype.h provides a standardised and platform
12 * independent implementation that supports seven bit ASCII characters.
13 * The specific intent is to not pass extended ASCII characters (> 127)
14 * even if the host operating system would.
16 * There is EBCDIC support included for machines which use this. However,
17 * there are a number of concerns about how well EBCDIC is supported
18 * throughout the rest of the source code. Refer to issue #4154 for
21 #ifndef OSSL_CRYPTO_CTYPE_H
22 # define OSSL_CRYPTO_CTYPE_H
25 # include <openssl/e_os2.h>
27 # define CTYPE_MASK_lower 0x1
28 # define CTYPE_MASK_upper 0x2
29 # define CTYPE_MASK_digit 0x4
30 # define CTYPE_MASK_space 0x8
31 # define CTYPE_MASK_xdigit 0x10
32 # define CTYPE_MASK_blank 0x20
33 # define CTYPE_MASK_cntrl 0x40
34 # define CTYPE_MASK_graph 0x80
35 # define CTYPE_MASK_print 0x100
36 # define CTYPE_MASK_punct 0x200
37 # define CTYPE_MASK_base64 0x400
38 # define CTYPE_MASK_asn1print 0x800
40 # define CTYPE_MASK_alpha (CTYPE_MASK_lower | CTYPE_MASK_upper)
41 # define CTYPE_MASK_alnum (CTYPE_MASK_alpha | CTYPE_MASK_digit)
44 * The ascii mask assumes that any other classification implies that
45 * the character is ASCII and that there are no ASCII characters
46 * that aren't in any of the classifications.
48 * This assumption holds at the moment, but it might not in the future.
50 # define CTYPE_MASK_ascii (~0)
52 # ifdef CHARSET_EBCDIC
53 int ossl_toascii(int c);
54 int ossl_fromascii(int c);
56 # define ossl_toascii(c) (c)
57 # define ossl_fromascii(c) (c)
59 int ossl_ctype_check(int c, unsigned int mask);
61 int ossl_tolower(int c);
62 int ossl_toupper(int c);
64 int ossl_isdigit(int c);
65 int ossl_islower(int c);
66 int ossl_isupper(int c);
68 int ossl_ascii_isdigit(int c);
70 # define ossl_isalnum(c) (ossl_ctype_check((c), CTYPE_MASK_alnum))
71 # define ossl_isalpha(c) (ossl_ctype_check((c), CTYPE_MASK_alpha))
72 # ifdef CHARSET_EBCDIC
73 # define ossl_isascii(c) (ossl_ctype_check((c), CTYPE_MASK_ascii))
75 # define ossl_isascii(c) (((c) & ~127) == 0)
77 # define ossl_isblank(c) (ossl_ctype_check((c), CTYPE_MASK_blank))
78 # define ossl_iscntrl(c) (ossl_ctype_check((c), CTYPE_MASK_cntrl))
79 # define ossl_isgraph(c) (ossl_ctype_check((c), CTYPE_MASK_graph))
80 # define ossl_isprint(c) (ossl_ctype_check((c), CTYPE_MASK_print))
81 # define ossl_ispunct(c) (ossl_ctype_check((c), CTYPE_MASK_punct))
82 # define ossl_isspace(c) (ossl_ctype_check((c), CTYPE_MASK_space))
83 # define ossl_isxdigit(c) (ossl_ctype_check((c), CTYPE_MASK_xdigit))
84 # define ossl_isbase64(c) (ossl_ctype_check((c), CTYPE_MASK_base64))
85 # define ossl_isasn1print(c) (ossl_ctype_check((c), CTYPE_MASK_asn1print))