tcpdump  4.99.1
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netdissect-ctype.h
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1 /*
2  * Copyright (c) 1988-1997
3  * The Regents of the University of California. All rights reserved.
4  *
5  * Copyright (c) 1998-2012 Michael Richardson <mcr@tcpdump.org>
6  * The TCPDUMP project
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that: (1) source code distributions
10  * retain the above copyright notice and this paragraph in its entirety, (2)
11  * distributions including binary code include the above copyright notice and
12  * this paragraph in its entirety in the documentation or other materials
13  * provided with the distribution, and (3) all advertising materials mentioning
14  * features or use of this software display the following acknowledgement:
15  * ``This product includes software developed by the University of California,
16  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
17  * the University nor the names of its contributors may be used to endorse
18  * or promote products derived from this software without specific prior
19  * written permission.
20  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
21  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
22  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
23  */
24 
25 #ifndef netdissect_ctype_h
26 #define netdissect_ctype_h
27 
28 /*
29  * Locale-independent macros for testing character properties and
30  * stripping the 8th bit from characters.
31  *
32  * Byte values outside the ASCII range are considered unprintable, so
33  * both ND_ASCII_ISPRINT() and ND_ASCII_ISGRAPH() return "false" for them.
34  *
35  * Assumed to be handed a value between 0 and 255, i.e. don't hand them
36  * a char, as those might be in the range -128 to 127.
37  */
38 #define ND_ISASCII(c) (!((c) & 0x80)) /* value is an ASCII code point */
39 #define ND_ASCII_ISPRINT(c) ((c) >= 0x20 && (c) <= 0x7E)
40 #define ND_ASCII_ISGRAPH(c) ((c) > 0x20 && (c) <= 0x7E)
41 #define ND_ASCII_ISDIGIT(c) ((c) >= '0' && (c) <= '9')
42 #define ND_TOASCII(c) ((c) & 0x7F)
43 
44 /*
45  * Locale-independent macros for coverting to upper or lower case.
46  *
47  * Byte values outside the ASCII range are not converted. Byte values
48  * *in* the ASCII range are converted to byte values in the ASCII range;
49  * in particular, 'i' is upper-cased to 'I" and 'I' is lower-cased to 'i',
50  * even in Turkish locales.
51  */
52 #define ND_ASCII_TOLOWER(c) (((c) >= 'A' && (c) <= 'Z') ? (c) - 'A' + 'a' : (c))
53 #define ND_ASCII_TOUPPER(c) (((c) >= 'a' && (c) <= 'z') ? (c) - 'a' + 'A' : (c))
54 
55 #endif /* netdissect-ctype.h */
56