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Get rid of some of "dereferencing type-punned" warnings by converting

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tdir_offset field of TIFFDirEntry structure into union.
This commit is contained in:
Andrey Kiselev 2008-04-14 09:05:25 +00:00
parent 3dc82cc7b7
commit 07818e9356
3 changed files with 26 additions and 28 deletions
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38
libtiff/tif_dirread.c
View File

@ -1,4 +1,4 @@
/* $Id: tif_dirread.c,v 1.140 2008-04-09 08:58:11 dron Exp $ */
/* $Id: tif_dirread.c,v 1.141 2008-04-14 09:05:25 dron Exp $ */
/*
* Copyright (c) 1988-1997 Sam Leffler
@ -751,8 +751,7 @@ static enum TIFFReadDirEntryErr TIFFReadDirEntryArray(TIFF* tif, TIFFDirEntry* d
else
{
enum TIFFReadDirEntryErr err;
uint32 offset;
offset=*(uint32*)(&direntry->tdir_offset);
uint32 offset = direntry->tdir_offset.toff_long;
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabLong(&offset);
err=TIFFReadDirEntryData(tif,(uint64)offset,(tmsize_t)datasize,data);
@ -770,8 +769,7 @@ static enum TIFFReadDirEntryErr TIFFReadDirEntryArray(TIFF* tif, TIFFDirEntry* d
else
{
enum TIFFReadDirEntryErr err;
uint64 offset;
offset=direntry->tdir_offset;
uint64 offset = direntry->tdir_offset.toff_long8;
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabLong8(&offset);
err=TIFFReadDirEntryData(tif,offset,(tmsize_t)datasize,data);
@ -2757,7 +2755,8 @@ static void TIFFReadDirEntryCheckedSbyte(TIFF* tif, TIFFDirEntry* direntry, int8
static void TIFFReadDirEntryCheckedShort(TIFF* tif, TIFFDirEntry* direntry, uint16* value)
{
*value=*(uint16*)(&direntry->tdir_offset);
*value = direntry->tdir_offset.toff_short;
//*value=*(uint16*)(&direntry->tdir_offset);
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabShort(value);
}
@ -2788,8 +2787,7 @@ static enum TIFFReadDirEntryErr TIFFReadDirEntryCheckedLong8(TIFF* tif, TIFFDirE
if (!(tif->tif_flags&TIFF_BIGTIFF))
{
enum TIFFReadDirEntryErr err;
uint32 offset;
offset=*(uint32*)(&direntry->tdir_offset);
uint32 offset = direntry->tdir_offset.toff_long;
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabLong(&offset);
err=TIFFReadDirEntryData(tif,offset,8,value);
@ -2797,7 +2795,7 @@ static enum TIFFReadDirEntryErr TIFFReadDirEntryCheckedLong8(TIFF* tif, TIFFDirE
return(err);
}
else
*value=direntry->tdir_offset;
*value = direntry->tdir_offset.toff_long8;
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabLong8(value);
return(TIFFReadDirEntryErrOk);
@ -2808,8 +2806,7 @@ static enum TIFFReadDirEntryErr TIFFReadDirEntryCheckedSlong8(TIFF* tif, TIFFDir
if (!(tif->tif_flags&TIFF_BIGTIFF))
{
enum TIFFReadDirEntryErr err;
uint32 offset;
offset=*(uint32*)(&direntry->tdir_offset);
uint32 offset = direntry->tdir_offset.toff_long;
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabLong(&offset);
err=TIFFReadDirEntryData(tif,offset,8,value);
@ -2832,8 +2829,7 @@ static enum TIFFReadDirEntryErr TIFFReadDirEntryCheckedRational(TIFF* tif, TIFFD
if (!(tif->tif_flags&TIFF_BIGTIFF))
{
enum TIFFReadDirEntryErr err;
uint32 offset;
offset=*(uint32*)(&direntry->tdir_offset);
uint32 offset = direntry->tdir_offset.toff_long;
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabLong(&offset);
err=TIFFReadDirEntryData(tif,offset,8,m);
@ -2841,7 +2837,7 @@ static enum TIFFReadDirEntryErr TIFFReadDirEntryCheckedRational(TIFF* tif, TIFFD
return(err);
}
else
*(uint64*)m=direntry->tdir_offset;
*(uint64*)m = direntry->tdir_offset.toff_long8;
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabArrayOfLong(m,2);
if (m[0]==0)
@ -2861,8 +2857,7 @@ static enum TIFFReadDirEntryErr TIFFReadDirEntryCheckedSrational(TIFF* tif, TIFF
if (!(tif->tif_flags&TIFF_BIGTIFF))
{
enum TIFFReadDirEntryErr err;
uint32 offset;
offset=*(uint32*)(&direntry->tdir_offset);
uint32 offset = direntry->tdir_offset.toff_long;
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabLong(&offset);
err=TIFFReadDirEntryData(tif,offset,8,m);
@ -2870,7 +2865,7 @@ static enum TIFFReadDirEntryErr TIFFReadDirEntryCheckedSrational(TIFF* tif, TIFF
return(err);
}
else
*(uint64*)m=direntry->tdir_offset;
*(uint64*)m=direntry->tdir_offset.toff_long8;
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabArrayOfLong(m,2);
if ((int32)m[0]==0)
@ -2896,8 +2891,7 @@ static enum TIFFReadDirEntryErr TIFFReadDirEntryCheckedDouble(TIFF* tif, TIFFDir
if (!(tif->tif_flags&TIFF_BIGTIFF))
{
enum TIFFReadDirEntryErr err;
uint32 offset;
offset=*(uint32*)(&direntry->tdir_offset);
uint32 offset = direntry->tdir_offset.toff_long;
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabLong(&offset);
err=TIFFReadDirEntryData(tif,offset,8,value);
@ -2905,7 +2899,7 @@ static enum TIFFReadDirEntryErr TIFFReadDirEntryCheckedDouble(TIFF* tif, TIFFDir
return(err);
}
else
*(uint64*)value=direntry->tdir_offset;
*(uint64*)value=direntry->tdir_offset.toff_long8;
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabLong8((uint64*)value);
return(TIFFReadDirEntryErrOk);
@ -4526,7 +4520,7 @@ TIFFFetchDirectory(TIFF* tif, uint64 diroff, TIFFDirEntry** pdir,
TIFFSwabLong8((uint64*)ma);
mb->tdir_count=*(uint64*)ma;
ma+=sizeof(uint64);
mb->tdir_offset=*(uint64*)ma;
mb->tdir_offset.toff_long8=*(uint64*)ma;
ma+=sizeof(uint64);
}
mb++;
@ -5252,7 +5246,7 @@ TIFFFetchSubjectDistance(TIFF* tif, TIFFDirEntry* dir)
}
else
{
*(uint64*)m=dir->tdir_offset;
*(uint64*)m=dir->tdir_offset.toff_long8;
err=TIFFReadDirEntryErrOk;
}
}

8
libtiff/tif_dirwrite.c
View File

@ -1,4 +1,4 @@
/* $Id: tif_dirwrite.c,v 1.66 2008-04-10 11:08:48 dron Exp $ */
/* $Id: tif_dirwrite.c,v 1.67 2008-04-14 09:05:26 dron Exp $ */
/*
* Copyright (c) 1988-1997 Sam Leffler
@ -2120,7 +2120,7 @@ TIFFWriteDirectoryTagData(TIFF* tif, uint32* ndir, TIFFDirEntry* dir, uint16 tag
dir[m].tdir_tag=tag;
dir[m].tdir_type=datatype;
dir[m].tdir_count=count;
dir[m].tdir_offset=0;
dir[m].tdir_offset.toff_long8 = 0;
if (datalength<=((tif->tif_flags&TIFF_BIGTIFF)?0x8U:0x4U))
_TIFFmemcpy(&dir[m].tdir_offset,data,datalength);
else
@ -2159,9 +2159,9 @@ TIFFWriteDirectoryTagData(TIFF* tif, uint32* ndir, TIFFDirEntry* dir, uint16 tag
}
else
{
dir[m].tdir_offset=na;
dir[m].tdir_offset.toff_long8 = na;
if (tif->tif_flags&TIFF_SWAB)
TIFFSwabLong8(&dir[m].tdir_offset);
TIFFSwabLong8(&dir[m].tdir_offset.toff_long8);
}
}
(*ndir)++;

8
libtiff/tiffiop.h
View File

@ -1,4 +1,4 @@
/* $Id: tiffiop.h,v 1.72 2008-04-10 11:08:48 dron Exp $ */
/* $Id: tiffiop.h,v 1.73 2008-04-14 09:05:26 dron Exp $ */
/*
* Copyright (c) 1988-1997 Sam Leffler
@ -86,7 +86,11 @@ typedef struct {
uint16 tdir_tag; /* see below */
uint16 tdir_type; /* data type; see below */
uint64 tdir_count; /* number of items; length in spec */
uint64 tdir_offset;
union {
uint16 toff_short;
uint32 toff_long;
uint64 toff_long8;
} tdir_offset; /* either offset or the data itself if fits */
} TIFFDirEntry;
typedef struct client_info {