source: releases/0.10.0/lib/smb_deps.c @ 245

Last change on this file since 245 was 136, checked in by tim, 16 years ago

fixed various integer issues and memory allocation issues

polished error message functions and added initial messages in a few places

  • Property svn:keywords set to Id
File size: 4.0 KB
Line 
1/*
2 * This file contains miscellaneous pieces of code which regfio.c
3 * depends upon, from the Samba Subversion tree.  See:
4 *   http://websvn.samba.org/cgi-bin/viewcvs.cgi/trunk/source/
5 *
6 * Copyright (C) 2005-2006,2009 Timothy D. Morgan
7 * Copyright (C) 1992-2005 Samba development team
8 *               (see individual files under Subversion for details.)
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 3 of the License.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * $Id: smb_deps.c 136 2009-01-23 17:29:51Z tim $
24 */
25
26#include "../include/smb_deps.h"
27
28
29/* These act as replacements for numerous Samba memory allocation
30 *   functions.
31 */
32void* zalloc(size_t size)
33{
34  void* ret_val = NULL;
35  if((size > 0) && (ret_val = (void*)malloc(size)) != NULL)
36    memset(ret_val, 0, size);
37
38  return ret_val;
39}
40
41void* zcalloc(size_t size, unsigned int count)
42{
43  return zalloc(size*count);
44}
45
46/* From lib/time.c */
47
48/****************************************************************************
49 Put a 8 byte filetime from a time_t
50 This takes real GMT as input and converts to kludge-GMT
51****************************************************************************/
52void unix_to_nt_time(NTTIME *nt, time_t t)
53{
54  double d;
55 
56  if (t==0) 
57  {
58    nt->low = 0;
59    nt->high = 0;
60    return;
61  }
62 
63  if (t == TIME_T_MAX) 
64  {
65    nt->low = 0xffffffff;
66    nt->high = 0x7fffffff;
67    return;
68  }             
69 
70  if (t == -1) 
71  {
72    nt->low = 0xffffffff;
73    nt->high = 0xffffffff;
74    return;
75  }             
76 
77  /* this converts GMT to kludge-GMT */
78  /* XXX: This was removed due to difficult dependency requirements. 
79   *      So far, times appear to be correct without this adjustment, but
80   *      that may be proven wrong with adequate testing.
81   */
82  /* t -= TimeDiff(t) - get_serverzone(); */
83 
84  d = (double)(t);
85  d += TIME_FIXUP_CONSTANT;
86  d *= 1.0e7;
87 
88  nt->high = (uint32)(d * (1.0/(4.0*(double)(1<<30))));
89  nt->low  = (uint32)(d - ((double)nt->high)*4.0*(double)(1<<30));
90}
91
92
93/****************************************************************************
94 Interpret an 8 byte "filetime" structure to a time_t
95 It's originally in "100ns units since jan 1st 1601"
96
97 An 8 byte value of 0xffffffffffffffff will be returned as (time_t)0.
98
99 It appears to be kludge-GMT (at least for file listings). This means
100 its the GMT you get by taking a localtime and adding the
101 serverzone. This is NOT the same as GMT in some cases. This routine
102 converts this to real GMT.
103****************************************************************************/
104time_t nt_time_to_unix(const NTTIME* nt)
105{
106  double d;
107  time_t ret;
108  /* The next two lines are a fix needed for the
109     broken SCO compiler. JRA. */
110  time_t l_time_min = TIME_T_MIN;
111  time_t l_time_max = TIME_T_MAX;
112 
113  if (nt->high == 0 || (nt->high == 0xffffffff && nt->low == 0xffffffff))
114    return(0);
115 
116  d = ((double)nt->high)*4.0*(double)(1<<30);
117  d += (nt->low&0xFFF00000);
118  d *= 1.0e-7;
119 
120  /* now adjust by 369 years to make the secs since 1970 */
121  d -= TIME_FIXUP_CONSTANT;
122 
123  if (d <= l_time_min)
124    return (l_time_min);
125 
126  if (d >= l_time_max)
127    return (l_time_max);
128 
129  ret = (time_t)(d+0.5);
130 
131  /* this takes us from kludge-GMT to real GMT */
132  /* XXX: This was removed due to difficult dependency requirements. 
133   *      So far, times appear to be correct without this adjustment, but
134   *      that may be proven wrong with adequate testing.
135   */
136  /*
137    ret -= get_serverzone();
138    ret += LocTimeDiff(ret);
139  */
140
141  return(ret);
142}
143
144/* End of stuff from lib/time.c */
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