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// $Id$
#include "ace/OS_Dirent.h"
#include "ace/OS_String.h"
#include "ace/OS_Memory.h"
#include "ace/Log_Msg.h"
ACE_RCSID(ace, OS_Dirent, "$Id$")
#if !defined (ACE_HAS_INLINED_OSCALLS)
# include "ace/OS_Dirent.inl"
#endif /* ACE_HAS_INLINED_OS_CALLS */
ACE_DIR *
ACE_OS_Dirent::opendir_emulation (const ACE_TCHAR *filename)
{
#if defined (ACE_WIN32)
ACE_DIR *dir;
ACE_TCHAR extra[3] = {0,0,0};
/*
Note: the semantics of the win32 function FindFirstFile take the
basename(filename) as a pattern to be matched within the dirname(filename).
This is contrary to the behavior of the posix function readdir which treats
basename(filename) as a directory to be opened and read.
For this reason, we append a slash-star or backslash-star to the supplied
filename so the result is that FindFirstFile will do what we need.
According to the documentation for FindFirstFile, either a '/' or a '\' may
be used as a directory name separator.
Of course, it is necessary to ensure that this is only done if the trailing
filespec is not already there.
Phil Mesnier
*/
size_t lastchar = ACE_OS_String::strlen (filename);
if (lastchar > 0)
{
if (filename[lastchar-1] != '*')
{
if (filename[lastchar-1] != '/' && filename[lastchar-1] != '\\')
ACE_OS_String::strcpy (extra, ACE_LIB_TEXT ("/*"));
else
ACE_OS_String::strcpy (extra, ACE_LIB_TEXT ("*"));
}
}
ACE_NEW_RETURN (dir, ACE_DIR, 0);
ACE_NEW_RETURN (dir->directory_name_,
ACE_TCHAR[lastchar + ACE_OS_String::strlen (extra) + 1],
0);
ACE_OS_String::strcpy (dir->directory_name_, filename);
if (extra[0])
ACE_OS_String::strcat (dir->directory_name_, extra);
dir->current_handle_ = INVALID_HANDLE_VALUE;
dir->started_reading_ = 0;
return dir;
#else /* ACE_WIN32 */
ACE_UNUSED_ARG (filename);
ACE_NOTSUP_RETURN (0);
#endif /* ACE_WIN32 */
}
void
ACE_OS_Dirent::closedir_emulation (ACE_DIR *d)
{
#if defined (ACE_WIN32)
if (d->current_handle_ != INVALID_HANDLE_VALUE)
::FindClose (d->current_handle_);
d->current_handle_ = INVALID_HANDLE_VALUE;
d->started_reading_ = 0;
#else /* ACE_WIN32 */
ACE_UNUSED_ARG (d);
#endif /* ACE_WIN32 */
}
dirent *
ACE_OS_Dirent::readdir_emulation (ACE_DIR *d)
{
#if defined (ACE_WIN32)
if (!d->started_reading_)
{
d->current_handle_ = ACE_TEXT_FindFirstFile (d->directory_name_,
&(d->fdata_));
if (d->current_handle_ != INVALID_HANDLE_VALUE)
{
// Skip "." and ".."
int retval = 1;
while (*d->fdata_.cFileName == '.'
&& retval
&& d->fdata_.dwFileAttributes == FILE_ATTRIBUTE_DIRECTORY)
retval = ACE_TEXT_FindNextFile (d->current_handle_, &d->fdata_);
if (retval == 0)
{
::FindClose (d->current_handle_);
d->current_handle_ = INVALID_HANDLE_VALUE;
}
}
d->started_reading_ = 1;
}
else
{
int retval = ACE_TEXT_FindNextFile (d->current_handle_,
&(d->fdata_));
if (retval == 0)
{
// Make sure to close the handle explicitly to avoid a leak!
::FindClose (d->current_handle_);
d->current_handle_ = INVALID_HANDLE_VALUE;
}
}
if (d->current_handle_ != INVALID_HANDLE_VALUE)
{
d->dirent_ = (dirent *) ACE_OS_Memory::malloc (sizeof (dirent) +
(ACE_OS_String::strlen (d->fdata_.cFileName)
* sizeof (ACE_TCHAR)));
ACE_OS_String::strcpy (d->dirent_->d_name, d->fdata_.cFileName);
d->dirent_->d_reclen =
sizeof (dirent) +
(ACE_OS_String::strlen (d->dirent_->d_name) * sizeof (ACE_TCHAR));
return d->dirent_;
}
else
return 0;
#else /* ACE_WIN32 */
ACE_UNUSED_ARG (d);
ACE_NOTSUP_RETURN (0);
#endif /* ACE_WIN32 */
}
extern "C"
{
typedef int (*ACE_SCANDIR_COMPARATOR) (const void *, const void *);
}
int
ACE_OS_Dirent::scandir_emulation (const ACE_TCHAR *dirname,
dirent **namelist[],
int (*selector) (const dirent *entry),
int (*comparator) (const dirent **f1,
const dirent **f2))
{
ACE_DIR *dirp = ACE_OS_Dirent::opendir (dirname);
if (dirp == 0)
return -1;
// A sanity check here. "namelist" had better not be zero.
else if (namelist == 0)
return -1;
dirent **vector = 0;
dirent *dp;
int arena_size = 0;
int nfiles = 0;
int fail = 0;
// @@ This code shoulduse readdir_r() rather than readdir().
for (dp = ACE_OS_Dirent::readdir (dirp);
dp != 0;
dp = ACE_OS_Dirent::readdir (dirp))
{
if (selector && (*selector)(dp) == 0)
continue;
// If we get here, we have a dirent that the user likes.
if (nfiles == arena_size)
{
dirent **newv;
if (arena_size == 0)
arena_size = 10;
else
arena_size *= 2;
newv = (dirent **) ACE_OS_Memory::realloc (vector,
arena_size * sizeof (dirent *));
if (newv == 0)
{
fail = 1;
break;
}
vector = newv;
}
int dsize =
sizeof (dirent) +
((ACE_OS_String::strlen (dp->d_name) + 1) * sizeof (ACE_TCHAR));
dirent *newdp = (dirent *) ACE_OS_Memory::malloc (dsize);
if (newdp == 0)
{
fail = 1;
break;
}
vector[nfiles++] = (dirent *) ACE_OS_String::memcpy (newdp, dp, dsize);
}
if (fail)
{
ACE_OS_Dirent::closedir (dirp);
while (nfiles-- > 0)
ACE_OS_Memory::free (vector[nfiles]);
ACE_OS_Memory::free (vector);
return -1;
}
ACE_OS_Dirent::closedir (dirp);
*namelist = vector;
if (comparator)
ACE_OS::qsort (*namelist,
nfiles,
sizeof (dirent *),
(ACE_SCANDIR_COMPARATOR) comparator);
return nfiles;
}
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