/* $Id: tif_unix.c,v 1.28 2017-01-11 19:02:49 erouault 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 UNIX-specific Routines. These are should also work with the

 * Windows Common RunTime Library.

 */

#include "tif_config.h"

#ifdef HAVE_SYS_TYPES_H

# include <sys/types.h>

#endif

#include <errno.h>

#include <stdarg.h>

#include <stdlib.h>

#include <sys/stat.h>

#ifdef HAVE_UNISTD_H

# include <unistd.h>

#endif

#ifdef HAVE_FCNTL_H

# include <fcntl.h>

#endif

#ifdef HAVE_IO_H

# include <io.h>

#endif

#include "tiffiop.h"

#define TIFF_IO_MAX 2147483647U

typedef union fd_as_handle_union

{

	int fd;

	thandle_t h;

} fd_as_handle_union_t;

static tmsize_t

_tiffReadProc(thandle_t fd, void* buf, tmsize_t size)

{

	fd_as_handle_union_t fdh;

        const size_t bytes_total = (size_t) size;

        size_t bytes_read;

        tmsize_t count = -1;

	if ((tmsize_t) bytes_total != size)

	{

		errno=EINVAL;

		return (tmsize_t) -1;

	}

	fdh.h = fd;

        for (bytes_read=0; bytes_read < bytes_total; bytes_read+=count)

        {

                char *buf_offset = (char *) buf+bytes_read;

                size_t io_size = bytes_total-bytes_read;

                if (io_size > TIFF_IO_MAX)

                        io_size = TIFF_IO_MAX;

                count=read(fdh.fd, buf_offset, (TIFFIOSize_t) io_size);

                if (count <= 0)

                        break;

        }

        if (count < 0)

                return (tmsize_t)-1;

        return (tmsize_t) bytes_read;

}

static tmsize_t

_tiffWriteProc(thandle_t fd, void* buf, tmsize_t size)

{

	fd_as_handle_union_t fdh;

	const size_t bytes_total = (size_t) size;

        size_t bytes_written;

        tmsize_t count = -1;

	if ((tmsize_t) bytes_total != size)

	{

		errno=EINVAL;

		return (tmsize_t) -1;

	}

	fdh.h = fd;

        for (bytes_written=0; bytes_written < bytes_total; bytes_written+=count)

        {

                const char *buf_offset = (char *) buf+bytes_written;

                size_t io_size = bytes_total-bytes_written;

                if (io_size > TIFF_IO_MAX)

                        io_size = TIFF_IO_MAX;

                count=write(fdh.fd, buf_offset, (TIFFIOSize_t) io_size);

                if (count <= 0)

                        break;

        }

        if (count < 0)

                return (tmsize_t)-1;

        return (tmsize_t) bytes_written;

	/* return ((tmsize_t) write(fdh.fd, buf, bytes_total)); */

}

static uint64

_tiffSeekProc(thandle_t fd, uint64 off, int whence)

{

	fd_as_handle_union_t fdh;

	_TIFF_off_t off_io = (_TIFF_off_t) off;

	if ((uint64) off_io != off)

	{

		errno=EINVAL;

		return (uint64) -1; /* this is really gross */

	}

	fdh.h = fd;

	return((uint64)_TIFF_lseek_f(fdh.fd,off_io,whence));

}

static int

_tiffCloseProc(thandle_t fd)

{

	fd_as_handle_union_t fdh;

	fdh.h = fd;

	return(close(fdh.fd));

}

static uint64

_tiffSizeProc(thandle_t fd)

{

	_TIFF_stat_s sb;

	fd_as_handle_union_t fdh;

	fdh.h = fd;

	if (_TIFF_fstat_f(fdh.fd,&sb)<0)

		return(0);

	else

		return((uint64)sb.st_size);

}

#ifdef HAVE_MMAP

#include <sys/mman.h>

static int

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

{

	uint64 size64 = _tiffSizeProc(fd);

	tmsize_t sizem = (tmsize_t)size64;

	if ((uint64)sizem==size64) {

		fd_as_handle_union_t fdh;

		fdh.h = fd;

		*pbase = (void*)

		    mmap(0, (size_t)sizem, PROT_READ, MAP_SHARED, fdh.fd, 0);

		if (*pbase != (void*) -1) {

			*psize = (tmsize_t)sizem;

			return (1);

		}

	}

	return (0);

}

static void

_tiffUnmapProc(thandle_t fd, void* base, toff_t size)

{

	(void) fd;

	(void) munmap(base, (off_t) size);

}

#else /* !HAVE_MMAP */

static int

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

{

	(void) fd; (void) pbase; (void) psize;

	return (0);

}

static void

_tiffUnmapProc(thandle_t fd, void* base, toff_t size)

{

	(void) fd; (void) base; (void) size;

}

#endif /* !HAVE_MMAP */

/*

 * Open a TIFF file descriptor for read/writing.

 */

TIFF*

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

{

	TIFF* tif;

	fd_as_handle_union_t fdh;

	fdh.fd = fd;

	tif = TIFFClientOpen(name, mode,

	    fdh.h,

	    _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, fd;

	TIFF* tif;

	m = _TIFFgetMode(mode, module);

	if (m == -1)

		return ((TIFF*)0);

/* for cygwin and mingw */

#ifdef O_BINARY

	m |= O_BINARY;

#endif

	fd = open(name, m, 0666);

	if (fd < 0) {

		if (errno > 0 && strerror(errno) != NULL ) {

			TIFFErrorExt(0, module, "%s: %s", name, strerror(errno) );

		} else {

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

		}

		return ((TIFF *)0);

	}

	tif = TIFFFdOpen((int)fd, name, mode);

	if(!tif)

		close(fd);

	return tif;

}

#ifdef __WIN32__

#include <windows.h>

/*

 * Open a TIFF file with a Unicode filename, for read/writing.

 */

TIFF*

TIFFOpenW(const wchar_t* name, const char* mode)

{

	static const char module[] = "TIFFOpenW";

	int m, fd;

	int mbsize;

	char *mbname;

	TIFF* tif;

	m = _TIFFgetMode(mode, module);

	if (m == -1)

		return ((TIFF*)0);

/* for cygwin and mingw */

#ifdef O_BINARY

	m |= O_BINARY;

#endif

	fd = _wopen(name, m, 0666);

	if (fd < 0) {

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

		return ((TIFF *)0);

	}

	mbname = NULL;

	mbsize = WideCharToMultiByte(CP_ACP, 0, name, -1, NULL, 0, NULL, NULL);

	if (mbsize > 0) {

		mbname = _TIFFmalloc(mbsize);

		if (!mbname) {

			TIFFErrorExt(0, module,

			"Can't allocate space for filename conversion buffer");

			return ((TIFF*)0);

		}

		WideCharToMultiByte(CP_ACP, 0, name, -1, mbname, mbsize,

				    NULL, NULL);

	}

	tif = TIFFFdOpen((int)fd, (mbname != NULL) ? mbname : "<unknown>",

			 mode);

	_TIFFfree(mbname);

	if(!tif)

		close(fd);

	return tif;

}

#endif

void*

_TIFFmalloc(tmsize_t s)

{

        if (s == 0)

                return ((void *) NULL);

	return (malloc((size_t) s));

}

void* _TIFFcalloc(tmsize_t nmemb, tmsize_t siz)

{

    if( nmemb == 0 || siz == 0 )

        return ((void *) NULL);

    return calloc((size_t) nmemb, (size_t)siz);

}

void

_TIFFfree(void* p)

{

	free(p);

}

void*

_TIFFrealloc(void* p, tmsize_t s)

{

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

}

void

_TIFFmemset(void* p, int v, tmsize_t c)

{

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

}

void

_TIFFmemcpy(void* d, const void* s, tmsize_t c)

{

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

}

int

_TIFFmemcmp(const void* p1, const void* p2, tmsize_t c)

{

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

}

static void

unixWarningHandler(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 = unixWarningHandler;

static void

unixErrorHandler(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 = unixErrorHandler;

/* vim: set ts=8 sts=8 sw=8 noet: */

/*

 * Local Variables:

 * mode: c

 * c-basic-offset: 8

 * fill-column: 78

 * End:

 */