1 /*
2  * Copyright 2017-2021 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 /*
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.
15  *
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
19  * details.
20  */
21 #ifndef OSSL_CRYPTO_CTYPE_H
22 # define OSSL_CRYPTO_CTYPE_H
23 # pragma once
24 
25 # define CTYPE_MASK_lower       0x1
26 # define CTYPE_MASK_upper       0x2
27 # define CTYPE_MASK_digit       0x4
28 # define CTYPE_MASK_space       0x8
29 # define CTYPE_MASK_xdigit      0x10
30 # define CTYPE_MASK_blank       0x20
31 # define CTYPE_MASK_cntrl       0x40
32 # define CTYPE_MASK_graph       0x80
33 # define CTYPE_MASK_print       0x100
34 # define CTYPE_MASK_punct       0x200
35 # define CTYPE_MASK_base64      0x400
36 # define CTYPE_MASK_asn1print   0x800
37 
38 # define CTYPE_MASK_alpha   (CTYPE_MASK_lower | CTYPE_MASK_upper)
39 # define CTYPE_MASK_alnum   (CTYPE_MASK_alpha | CTYPE_MASK_digit)
40 
41 /*
42  * The ascii mask assumes that any other classification implies that
43  * the character is ASCII and that there are no ASCII characters
44  * that aren't in any of the classifications.
45  *
46  * This assumption holds at the moment, but it might not in the future.
47  */
48 # define CTYPE_MASK_ascii   (~0)
49 
50 # ifdef CHARSET_EBCDIC
51 int ossl_toascii(int c);
52 int ossl_fromascii(int c);
53 # else
54 #  define ossl_toascii(c)       (c)
55 #  define ossl_fromascii(c)     (c)
56 # endif
57 int ossl_ctype_check(int c, unsigned int mask);
58 int ossl_tolower(int c);
59 int ossl_toupper(int c);
60 
61 int ossl_ascii_isdigit(const char inchar);
62 
63 # define ossl_isalnum(c)        (ossl_ctype_check((c), CTYPE_MASK_alnum))
64 # define ossl_isalpha(c)        (ossl_ctype_check((c), CTYPE_MASK_alpha))
65 # ifdef CHARSET_EBCDIC
66 # define ossl_isascii(c)        (ossl_ctype_check((c), CTYPE_MASK_ascii))
67 # else
68 # define ossl_isascii(c)        (((c) & ~127) == 0)
69 # endif
70 # define ossl_isblank(c)        (ossl_ctype_check((c), CTYPE_MASK_blank))
71 # define ossl_iscntrl(c)        (ossl_ctype_check((c), CTYPE_MASK_cntrl))
72 # define ossl_isdigit(c)        (ossl_ctype_check((c), CTYPE_MASK_digit))
73 # define ossl_isgraph(c)        (ossl_ctype_check((c), CTYPE_MASK_graph))
74 # define ossl_islower(c)        (ossl_ctype_check((c), CTYPE_MASK_lower))
75 # define ossl_isprint(c)        (ossl_ctype_check((c), CTYPE_MASK_print))
76 # define ossl_ispunct(c)        (ossl_ctype_check((c), CTYPE_MASK_punct))
77 # define ossl_isspace(c)        (ossl_ctype_check((c), CTYPE_MASK_space))
78 # define ossl_isupper(c)        (ossl_ctype_check((c), CTYPE_MASK_upper))
79 # define ossl_isxdigit(c)       (ossl_ctype_check((c), CTYPE_MASK_xdigit))
80 # define ossl_isbase64(c)       (ossl_ctype_check((c), CTYPE_MASK_base64))
81 # define ossl_isasn1print(c)    (ossl_ctype_check((c), CTYPE_MASK_asn1print))
82 
83 #endif
84