Fix hash function in xdiff library
[git/git.git] / xdiff / xmacros.h
CommitLineData
3443546f
LT
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, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 * Davide Libenzi <davidel@xmailserver.org>
20 *
21 */
22
23#if !defined(XMACROS_H)
24#define XMACROS_H
25
26
3443546f
LT
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')
9de08346
LT
33#define XDL_ADDBITS(v,b) ((v) + ((v) >> (b)))
34#define XDL_MASKBITS(b) ((1UL << (b)) - 1)
35#define XDL_HASHLONG(v,b) (XDL_ADDBITS((unsigned long)(v), b) & XDL_MASKBITS(b))
3443546f
LT
36#define XDL_PTRFREE(p) do { if (p) { xdl_free(p); (p) = NULL; } } while (0)
37#define XDL_LE32_PUT(p, v) \
38do { \
39 unsigned char *__p = (unsigned char *) (p); \
40 *__p++ = (unsigned char) (v); \
41 *__p++ = (unsigned char) ((v) >> 8); \
42 *__p++ = (unsigned char) ((v) >> 16); \
43 *__p = (unsigned char) ((v) >> 24); \
44} while (0)
45#define XDL_LE32_GET(p, v) \
46do { \
47 unsigned char const *__p = (unsigned char const *) (p); \
48 (v) = (unsigned long) __p[0] | ((unsigned long) __p[1]) << 8 | \
49 ((unsigned long) __p[2]) << 16 | ((unsigned long) __p[3]) << 24; \
50} while (0)
51
52
53#endif /* #if !defined(XMACROS_H) */
54