/* $Id: tif_unix.c,v 1.6 2005/11/18 15:48:42 malaterre 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"

#include <stdlib.h>
#include <sys/stat.h>

#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#if HAVE_FCNTL_H
# include <fcntl.h>
#endif

#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif

#if HAVE_IO_H
# include <io.h>
#endif

#include "tiffiop.h"

static tsize_t
_tiffReadProc(thandle_t fd, tdata_t buf, tsize_t size)
{
  return ((tsize_t) read((int) (long int)fd, buf, (size_t) size));
}

static tsize_t
_tiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size)
{
  return ((tsize_t) write((int) (long int)fd, buf, (size_t) size));
}

static toff_t
_tiffSeekProc(thandle_t fd, toff_t off, int whence)
{
  return ((toff_t) lseek((int) (long int)fd, (off_t) off, whence));
}

static int
_tiffCloseProc(thandle_t fd)
{
  return (close((int) (long int)fd));
}


static toff_t
_tiffSizeProc(thandle_t fd)
{
#ifdef _AM29K
  long fsize;
  return ((fsize = lseek((int) fd, 0, SEEK_END)) < 0 ? 0 : fsize);
#else
  struct stat sb;
  return (toff_t) (fstat((int) (long int)fd, &sb) < 0 ? 0 : sb.st_size);
#endif
}

#ifdef HAVE_MMAP
#include <sys/mman.h>

static int
_tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
{
  toff_t size = _tiffSizeProc(fd);
  if (size != (toff_t) -1) {
    *pbase = (tdata_t)
        mmap(0, size, PROT_READ, MAP_SHARED, (int) (long int)fd, 0);
    if (*pbase != (tdata_t) -1) {
      *psize = size;
      return (1);
    }
  }
  return (0);
}

static void
_tiffUnmapProc(thandle_t fd, tdata_t base, toff_t size)
{
  (void) fd;
  (void) munmap(base, (off_t) size);
}
#else /* !HAVE_MMAP */
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;
}
#endif /* !HAVE_MMAP */

/*
 * 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) (long int)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, fd;
        TIFF* tif;

  m = _TIFFgetMode(mode, module);
  if (m == -1)
    return ((TIFF*)0);

/* for cygwin and mingw */        
#ifdef O_BINARY
        m |= O_BINARY;
#endif        
        
#ifdef _AM29K
  fd = open(name, m);
#else
  fd = open(name, m, 0666);
#endif
  if (fd < 0) {
    TIFFError(module, "%s: Cannot open", name);
    return ((TIFF *)0);
  }

  tif = TIFFFdOpen((int)fd, name, mode);
  if(!tif)
    close(fd);
  return tif;
}

#ifdef __WIN32__
/*
 * 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) {
    TIFFError(module, "%s: 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) {
      TIFFError(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(tsize_t s)
{
  return (malloc((size_t) s));
}

void
_TIFFfree(tdata_t p)
{
  free(p);
}

void*
_TIFFrealloc(tdata_t p, tsize_t s)
{
  return (realloc(p, (size_t) s));
}

void
_TIFFmemset(tdata_t p, int v, tsize_t c)
{
  memset(p, v, (size_t) c);
}

void
_TIFFmemcpy(tdata_t d, const tdata_t s, tsize_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
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;
