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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 (at) 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 converting 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 
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