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 */

23 #if !defined(XMACROS_H)

24 #define XMACROS_H

27 #define GR_PRIME 0x9e370001UL

30 #define XDL_MIN(a, b) ((a) < (b) ? (a): (b))

31 #define XDL_MAX(a, b) ((a) > (b) ? (a): (b))

32 #define XDL_ABS(v) ((v) >= 0 ? (v): -(v))

34 #define XDL_HASHLONG(v, b) (((unsigned long)(v) * GR_PRIME) >> ((CHAR_BIT * sizeof(unsigned long)) - (b)))

35 #define XDL_PTRFREE(p) do { if (p) { xdl_free(p); (p) = NULL; } } while (0)

36 #define XDL_LE32_PUT(p, v) \

37 do { \

38 unsigned char *__p = (unsigned char *) (p); \

39 *__p++ = (unsigned char) (v); \

40 *__p++ = (unsigned char) ((v) >> 8); \

41 *__p++ = (unsigned char) ((v) >> 16); \

42 *__p = (unsigned char) ((v) >> 24); \

43 } while (0)

44 #define XDL_LE32_GET(p, v) \

45 do { \

46 unsigned char const *__p = (unsigned char const *) (p); \

47 (v) = (unsigned long) __p[0] | ((unsigned long) __p[1]) << 8 | \

48 ((unsigned long) __p[2]) << 16 | ((unsigned long) __p[3]) << 24; \

49 } while (0)