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/******************************************************************************
* $Id: tifvsi.cpp 10645 2007-01-18 02:22:39Z warmerdam $
*
* Project: GeoTIFF Driver
* Purpose: Implement system hook functions for libtiff on top of CPL/VSI,
* including > 2GB support. Based on tif_unix.c from libtiff
* distribution.
* Author: Frank Warmerdam, warmerdam@pobox.com
*
******************************************************************************
* Copyright (c) 2005, Frank Warmerdam, warmerdam@pobox.com
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
/*
* TIFF Library UNIX-specific Routines.
*/
#include "tiffio.h"
#include "cpl_vsi.h"
// We avoid including xtiffio.h since it drags in the libgeotiff version
// of the VSI functions.
CPL_C_START
extern TIFF CPL_DLL * XTIFFClientOpen(const char* name, const char* mode,
thandle_t thehandle,
TIFFReadWriteProc, TIFFReadWriteProc,
TIFFSeekProc, TIFFCloseProc,
TIFFSizeProc,
TIFFMapFileProc, TIFFUnmapFileProc);
CPL_C_END
static tsize_t
_tiffReadProc(thandle_t fd, tdata_t buf, tsize_t size)
{
return VSIFReadL( buf, 1, size, (FILE *) fd );
}
static tsize_t
_tiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size)
{
return VSIFWriteL( buf, 1, size, (FILE *) fd );
}
static toff_t
_tiffSeekProc(thandle_t fd, toff_t off, int whence)
{
if( VSIFSeekL( (FILE *) fd, off, whence ) == 0 )
return (toff_t) VSIFTellL( (FILE *) fd );
else
return (toff_t) -1;
}
static int
_tiffCloseProc(thandle_t fd)
{
return VSIFCloseL( (FILE *) fd );
}
static toff_t
_tiffSizeProc(thandle_t fd)
{
vsi_l_offset old_off;
toff_t file_size;
old_off = VSIFTellL( (FILE *) fd );
VSIFSeekL( (FILE *) fd, 0, SEEK_END );
file_size = (toff_t) VSIFTellL( (FILE *) fd );
VSIFSeekL( (FILE *) fd, old_off, SEEK_SET );
return file_size;
}
static int
_tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
{
(void) fd; (void) pbase; (void) psize;
return (0);
}
static void
_tiffUnmapProc(thandle_t fd, tdata_t base, toff_t size)
{
(void) fd; (void) base; (void) size;
}
/*
* Open a TIFF file for read/writing.
*/
TIFF* VSI_TIFFOpen(const char* name, const char* mode)
{
static const char module[] = "TIFFOpen";
int i, a_out;
char access[32];
FILE *fp;
TIFF *tif;
a_out = 0;
access[0] = '\0';
for( i = 0; mode[i] != '\0'; i++ )
{
if( mode[i] == 'r'
|| mode[i] == 'w'
|| mode[i] == '+'
|| mode[i] == 'a' )
{
access[a_out++] = mode[i];
access[a_out] = '\0';
}
}
strcat( access, "b" );
fp = VSIFOpenL( name, access );
if (fp == NULL) {
if( errno >= 0 )
TIFFError(module,"%s: %s", name, VSIStrerror( errno ) );
else
TIFFError(module, "%s: Cannot open", name);
return ((TIFF *)0);
}
tif = XTIFFClientOpen(name, mode,
(thandle_t) fp,
_tiffReadProc, _tiffWriteProc,
_tiffSeekProc, _tiffCloseProc, _tiffSizeProc,
_tiffMapProc, _tiffUnmapProc);
if( tif == NULL )
VSIFCloseL( fp );
return tif;
}
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