/* "$Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_atari.c,v 1.2 2005/12/21 12:23:13 joris Exp $" */

/*

 * Copyright (c) 1988-1997 Sam Leffler

 * Copyright (c) 1991-1997 Silicon Graphics, Inc.

 *

 * Permission to use, copy, modify, distribute, and sell this software and 

 * its documentation for any purpose is hereby granted without fee, provided

 * that (i) the above copyright notices and this permission notice appear in

 * all copies of the software and related documentation, and (ii) the names of

 * Sam Leffler and Silicon Graphics may not be used in any advertising or

 * publicity relating to the software without the specific, prior written

 * permission of Sam Leffler and Silicon Graphics.

 * 

 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 

 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 

 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  

 * 

 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR

 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,

 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,

 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 

 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 

 * OF THIS SOFTWARE.

 */

/*

 * TIFF Library ATARI-specific Routines.

 */

#include "tiffiop.h"

#if defined(__TURBOC__)

#include <tos.h>

#include <stdio.h>

#else

#include <osbind.h>

#include <fcntl.h>

#endif

#ifndef O_ACCMODE

#define O_ACCMODE 3

#endif

#include <errno.h>

#define AEFILNF   -33

static tsize_t

_tiffReadProc(thandle_t fd, tdata_t buf, tsize_t size)

{

	long r;

	r = Fread((int) fd, size, buf);

	if (r < 0) {

		errno = (int)-r;

		r = -1;

	}

	return r;

}

static tsize_t

_tiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size)

{

	long r;

	r = Fwrite((int) fd, size, buf);

	if (r < 0) {

		errno = (int)-r;

		r = -1;

	}

	return r;

}

static toff_t

_tiffSeekProc(thandle_t fd, off_t off, int whence)

{

	char buf[256];

	long current_off, expected_off, new_off;

	if (whence == SEEK_END || off <= 0)

		return Fseek(off, (int) fd, whence);

	current_off = Fseek(0, (int) fd, SEEK_CUR); /* find out where we are */

	if (whence == SEEK_SET)

		expected_off = off;

	else

		expected_off = off + current_off;

	new_off = Fseek(off, (int) fd, whence);

	if (new_off == expected_off)

		return new_off;

	/* otherwise extend file -- zero filling the hole */

	if (new_off < 0)            /* error? */

		new_off = Fseek(0, (int) fd, SEEK_END); /* go to eof */

	_TIFFmemset(buf, 0, sizeof(buf));

	while (expected_off > new_off) {

		off = expected_off - new_off;

		if (off > sizeof(buf))

			off = sizeof(buf);

		if ((current_off = Fwrite((int) fd, off, buf)) != off)

			return (current_off > 0) ?

			    new_off + current_off : new_off;

		new_off += off;

	}

	return new_off;

}

static int

_tiffCloseProc(thandle_t fd)

{

	long r;

	r = Fclose((int) fd);

	if (r < 0) {

		errno = (int)-r;

		r = -1;

	}

	return (int)r;

}

static toff_t

_tiffSizeProc(thandle_t fd)

{

	long pos, eof;

	pos = Fseek(0, (int) fd, SEEK_CUR);

	eof = Fseek(0, (int) fd, SEEK_END);

	Fseek(pos, (int) fd, SEEK_SET);

	return eof;

}

static int

_tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)

{

	return (0);

}

static void

_tiffUnmapProc(thandle_t fd, tdata_t base, toff_t size)

{

}

/*

* Open a TIFF file descriptor for read/writing.

*/

TIFF*

TIFFFdOpen(int fd, const char* name, const char* mode)

{

	TIFF* tif;

	tif = TIFFClientOpen(name, mode,

		(thandle_t) fd,

		_tiffReadProc, _tiffWriteProc, _tiffSeekProc, _tiffCloseProc,

		_tiffSizeProc, _tiffMapProc, _tiffUnmapProc);

	if (tif)

		tif->tif_fd = fd;

	return (tif);

}

/*

* Open a TIFF file for read/writing.

*/

TIFF*

TIFFOpen(const char* name, const char* mode)

{

	static const char module[] = "TIFFOpen";

	int m;

	long fd;

	m = _TIFFgetMode(mode, module);

	if (m == -1)

		return ((TIFF*)0);

	if (m & O_TRUNC) {

		fd = Fcreate(name, 0);

	} else {

		fd = Fopen(name, m & O_ACCMODE);

		if (fd == AEFILNF && m & O_CREAT)

			fd = Fcreate(name, 0);

	}

	if (fd < 0)

		errno = (int)fd;

	if (fd < 0) {

		TIFFErrorExt(0, module, "%s: Cannot open", name);

		return ((TIFF*)0);

	}

	return (TIFFFdOpen(fd, name, mode));

}

#include <stdlib.h>

tdata_t

_TIFFmalloc(tsize_t s)

{

	return (malloc((size_t) s));

}

void

_TIFFfree(tdata_t p)

{

	free(p);

}

tdata_t

_TIFFrealloc(tdata_t p, tsize_t s)

{

	return (realloc(p, (size_t) s));

}

void

_TIFFmemset(tdata_t p, int v, size_t c)

{

	memset(p, v, (size_t) c);

}

void

_TIFFmemcpy(tdata_t d, const tdata_t s, size_t c)

{

	memcpy(d, s, (size_t) c);

}

int

_TIFFmemcmp(const tdata_t p1, const tdata_t p2, tsize_t c)

{

	return (memcmp(p1, p2, (size_t) c));

}

static void

atariWarningHandler(const char* module, const char* fmt, va_list ap)

{

	if (module != NULL)

		fprintf(stderr, "%s: ", module);

	fprintf(stderr, "Warning, ");

	vfprintf(stderr, fmt, ap);

	fprintf(stderr, ".\n");

}

TIFFErrorHandler _TIFFwarningHandler = atariWarningHandler;

static void

atariErrorHandler(const char* module, const char* fmt, va_list ap)

{

	if (module != NULL)

		fprintf(stderr, "%s: ", module);

	vfprintf(stderr, fmt, ap);

	fprintf(stderr, ".\n");

}

TIFFErrorHandler _TIFFerrorHandler = atariErrorHandler;