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Applied changes for seek allowing 2-4GB seeks.

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This commit is contained in:
Frank Warmerdam 2000-01-28 21:42:48 +00:00
parent 592e7e59db
commit d9fbb1bc81
1 changed files with 14 additions and 7 deletions
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21
libtiff/tif_win32.c
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@ -1,4 +1,4 @@
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_win32.c,v 1.4 1999-11-27 21:43:59 warmerda Exp $ */ /* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_win32.c,v 1.5 2000-01-28 21:42:48 warmerda Exp $ */
/* /*
* Copyright (c) 1988-1997 Sam Leffler * Copyright (c) 1988-1997 Sam Leffler
@ -52,23 +52,30 @@ _tiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size)
static toff_t static toff_t
_tiffSeekProc(thandle_t fd, toff_t off, int whence) _tiffSeekProc(thandle_t fd, toff_t off, int whence)
{ {
DWORD dwMoveMethod; DWORD dwMoveMethod, dwMoveHigh;
/* we use this as a special code, so avoid accepting it */
if( off == 0xFFFFFFFF )
return 0xFFFFFFFF;
switch(whence) switch(whence)
{ {
case 0: case SEEK_SET:
dwMoveMethod = FILE_BEGIN; dwMoveMethod = FILE_BEGIN;
break; break;
case 1: case SEEK_CUR:
dwMoveMethod = FILE_CURRENT; dwMoveMethod = FILE_CURRENT;
break; break;
case 2: case SEEK_END:
dwMoveMethod = FILE_END; dwMoveMethod = FILE_END;
break; break;
default: default:
dwMoveMethod = FILE_BEGIN; dwMoveMethod = FILE_BEGIN;
break; break;
} }
return ((toff_t)SetFilePointer(fd, off, NULL, dwMoveMethod)); dwMoveHigh = 0;
return ((toff_t)SetFilePointer(fd, (LONG) off, (PLONG)&dwMoveHigh,
dwMoveMethod));
} }
static int static int
@ -109,7 +116,7 @@ _tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
toff_t size; toff_t size;
HANDLE hMapFile; HANDLE hMapFile;
if ((size = _tiffSizeProc(fd)) == (toff_t)-1) if ((size = _tiffSizeProc(fd)) == 0xFFFFFFFF)
return (0); return (0);
hMapFile = CreateFileMapping(fd, NULL, PAGE_READONLY, 0, size, NULL); hMapFile = CreateFileMapping(fd, NULL, PAGE_READONLY, 0, size, NULL);
if (hMapFile == NULL) if (hMapFile == NULL)