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Write the tif_nextdiroff value instead of a fixed zero when writing

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directory contents to preserve the ability to rewrite directories in place,
even in the middle of a directory chain.
This commit is contained in:
Frank Warmerdam 2007-08-24 20:49:38 +00:00
parent a6bea11162
commit 8b2b03ae11
2 changed files with 9 additions and 4 deletions
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7
ChangeLog
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@ -1,6 +1,11 @@
2007-08-24 Frank Warmerdam <warmerdam@pobox.com>
* tif_dirinfo.c: _TIFFMergeFields() now only merges in field
* tif_dirwrite.c: Write the tif_nextdiroff value instead of a fixed
zero when writing directory contents to preserve the ability to
rewrite directories in place, even in the middle of a directory
chain.
* tif_dirinfo.c: _TIFFMergeFields() now only merges in field
definitions that are missing. Existing definitions are silently
ignored.

6
libtiff/tif_dirwrite.c
View File

@ -1,4 +1,4 @@
/* $Id: tif_dirwrite.c,v 1.56 2007-07-10 11:52:02 dron Exp $ */
/* $Id: tif_dirwrite.c,v 1.57 2007-08-24 20:49:38 fwarmerdam Exp $ */
/*
* Copyright (c) 1988-1997 Sam Leffler
@ -781,7 +781,7 @@ TIFFWriteDirectorySec(TIFF* tif, int isimage, int imagedone, uint64* pdiroff)
n+=4;
o++;
}
*(uint32*)n=0;
*(uint32*)n = tif->tif_nextdiroff;
}
else
{
@ -811,7 +811,7 @@ TIFFWriteDirectorySec(TIFF* tif, int isimage, int imagedone, uint64* pdiroff)
n+=8;
o++;
}
*(uint64*)n=0;
*(uint64*)n = tif->tif_nextdiroff;
}
_TIFFfree(dir);
dir=NULL;