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checkin patches to implement nsILocalFile::GetDiskSpaceAvailable from Jason Eager and nsIFile::GetParent from pavlov. r=pavlov,blizzard,dougt. a=dougt

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blizzard%redhat.com 2000-04-01 20:07:14 +00:00
parent c02e95f57e
commit 71f21f226a
1 changed files with 109 additions and 1 deletions
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110
xpcom/io/nsLocalFileUnix.cpp
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@ -21,6 +21,8 @@
* Contributor(s):
* Mike Shaver <shaver@mozilla.org>
* Christopher Blizzard <blizzard@mozilla.org>
* Jason Eager <jce2@po.cwru.edu>
* Stuart Parmenter <pavlov@netscape.com>
*/
/*
@ -47,8 +49,25 @@
#include "nsILocalFile.h"
#include "nsLocalFileUnix.h"
#include "nsIComponentManager.h"
#include "nsString.h"
#include "prproces.h"
// we need these for statfs()
#ifdef HAVE_SYS_STATVFS_H
#include <sys/statvfs.h>
#endif
#ifdef HAVE_SYS_STATFS_H
#include <sys/statfs.h>
#endif
#ifdef HAVE_STATVFS
#define STATFS statvfs
#else
#define STATFS statfs
#endif
// On some platforms file/directory name comparisons need to
// be case-blind.
#if defined(VMS)
@ -912,14 +931,103 @@ NS_IMETHODIMP
nsLocalFile::GetDiskSpaceAvailable(PRInt64 *aDiskSpaceAvailable)
{
NS_ENSURE_ARG_POINTER(aDiskSpaceAvailable);
PRInt64 bytesFree = 0;
//These systems have the operations necessary to check disk space.
#if defined(HAVE_SYS_STATFS_H) || defined(HAVE_SYS_STATVFS_H)
// check to make sure that mPath is properly initialized
CHECK_mPath();
struct STATFS fs_buf;
// Members of the STATFS struct that you should know about:
// f_bsize = block size on disk.
// f_bavail = number of free blocks available to a non-superuser.
// f_bfree = number of total free blocks in file system.
if (STATFS(mPath, &fs_buf) < 0)
// The call to STATFS failed.
{
#ifdef DEBUG
printf("ERROR: GetDiskSpaceAvailable: STATFS call FAILED. \n");
#endif
return NS_ERROR_FAILURE;
}
#ifdef DEBUG_DISK_SPACE
printf("DiskSpaceAvailable: %d bytes\n",
fs_buf.f_bsize * (fs_buf.f_bavail - 1));
#endif
// The number of Bytes free = The number of free blocks available to
// a non-superuser, minus one as a fudge factor, multiplied by the size
// of the beforementioned blocks.
LL_I2L( bytesFree, (fs_buf.f_bsize * (fs_buf.f_bavail - 1) ) );
*aDiskSpaceAvailable = bytesFree;
return NS_OK;
#else
/*
** This platform doesn't have statfs or statvfs.
** I'm sure that there's a way to check for free disk space
** on platforms that don't have statfs
** (I'm SURE they have df, for example).
**
** Until we figure out how to do that, lets be honest
** and say that this command isn't implemented
** properly for these platforms yet.
*/
#ifdef DEBUG
printf("ERROR: GetDiskSpaceAvailable: Not implemented for plaforms without statfs.\n");
#endif
return NS_ERROR_NOT_IMPLEMENTED;
#endif /* HAVE_SYS_STATFS_H or HAVE_SYS_STATVFS_H */
}
NS_IMETHODIMP
nsLocalFile::GetParent(nsIFile **aParent)
{
NS_ENSURE_ARG_POINTER(aParent);
return NS_ERROR_NOT_IMPLEMENTED;
*aParent = nsnull;
CHECK_mPath();
nsCString parentPath = nsAutoString(mPath);
// check to see whether or not we need to cut off any trailing
// slashes
PRInt32 offset = parentPath.RFindChar('/');
PRInt32 length = parentPath.Length();
// eat of trailing slash marks
while ((length > 1) && offset && (length == (offset + 1))) {
parentPath.Truncate(offset);
offset = parentPath.RFindChar('/');
length = parentPath.Length();
}
if (offset == -1)
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
// for the case where we are at '/'
if (offset == 0)
offset++;
parentPath.Truncate(offset);
nsCOMPtr<nsILocalFile> localFile;
nsresult rv = NS_NewLocalFile(parentPath.GetBuffer(), getter_AddRefs(localFile));
if(NS_SUCCEEDED(rv) && localFile)
{
return localFile->QueryInterface(NS_GET_IID(nsIFile), (void**)aParent);
}
return rv;
}
/*