xmacros.h
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1 /*
2  * LibXDiff by Davide Libenzi ( File Differential Library )
3  * Copyright (C) 2003 Davide Libenzi
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this library; if not, see
17  * <http://www.gnu.org/licenses/>.
18  *
19  * Davide Libenzi <[email protected]>
20  *
21  */
22 
23 #if !defined(XMACROS_H)
24 #define XMACROS_H
25 
26 
27 
28 
29 #define XDL_MIN(a, b) ((a) < (b) ? (a): (b))
30 #define XDL_MAX(a, b) ((a) > (b) ? (a): (b))
31 #define XDL_ABS(v) ((v) >= 0 ? (v): -(v))
32 #define XDL_ISDIGIT(c) ((c) >= '0' && (c) <= '9')
33 #define XDL_ISSPACE(c) (isspace((unsigned char)(c)))
34 #define XDL_ADDBITS(v,b) ((v) + ((v) >> (b)))
35 #define XDL_MASKBITS(b) ((1UL << (b)) - 1)
36 #define XDL_HASHLONG(v,b) (XDL_ADDBITS((unsigned long)(v), b) & XDL_MASKBITS(b))
37 #define XDL_PTRFREE(p) do { if (p) { xdl_free(p); (p) = NULL; } } while (0)
38 #define XDL_LE32_PUT(p, v) \
39 do { \
40  unsigned char *__p = (unsigned char *) (p); \
41  *__p++ = (unsigned char) (v); \
42  *__p++ = (unsigned char) ((v) >> 8); \
43  *__p++ = (unsigned char) ((v) >> 16); \
44  *__p = (unsigned char) ((v) >> 24); \
45 } while (0)
46 #define XDL_LE32_GET(p, v) \
47 do { \
48  unsigned char const *__p = (unsigned char const *) (p); \
49  (v) = (unsigned long) __p[0] | ((unsigned long) __p[1]) << 8 | \
50  ((unsigned long) __p[2]) << 16 | ((unsigned long) __p[3]) << 24; \
51 } while (0)
52 
53 
54 #endif /* #if !defined(XMACROS_H) */