1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/* ftruncate replacement for Win32
Copyright (C) 2003 The GLib team
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation; either version 2.1,
or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
USA.
*/
#if defined __MSVCRT__ || defined __CYGWIN__ || defined __CYGWIN32__ || defined WIN32 || defined _WIN32 || defined __WIN32__
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#else
#error Sorry, an alternative ftruncate implementation is only provided for Win32. Write to help-smalltalk@gnu.org.
#endif
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
int
ftruncate (int fd, unsigned int size)
{
HANDLE hfile;
unsigned int curpos;
if (fd < 0)
{
errno = EBADF;
return -1;
}
hfile = (HANDLE) _get_osfhandle (fd);
curpos = SetFilePointer (hfile, 0, NULL, FILE_CURRENT);
if (curpos == ~0
|| SetFilePointer (hfile, size, NULL, FILE_BEGIN) == ~0
|| !SetEndOfFile (hfile))
{
int error = GetLastError ();
switch (error)
{
case ERROR_INVALID_HANDLE:
errno = EBADF;
break;
default:
errno = EIO;
break;
}
return -1;
}
return 0;
}
|
