/* $Id: tif_unix.c,v 1.23 2012-06-01 21:40:59 fwarmerdam 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 "itk_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"

static tmsize_t
_tiffReadProc(thandle_t fd, void* buf, tmsize_t size)
{
  size_t size_io = (size_t) size;
  if ((tmsize_t) size_io != size)
  {
    errno=EINVAL;
    return (tmsize_t) -1;
  }
  return ((tmsize_t) read((int) fd, buf, size_io));
}

static tmsize_t
_tiffWriteProc(thandle_t fd, void* buf, tmsize_t size)
{
  size_t size_io = (size_t) size;
  if ((tmsize_t) size_io != size)
  {
    errno=EINVAL;
    return (tmsize_t) -1;
  }
  return ((tmsize_t) write((int) fd, buf, size_io));
}

static uint64
_tiffSeekProc(thandle_t fd, uint64 off, int whence)
{
  off_t off_io = (off_t) off;
  if ((uint64) off_io != off)
  {
    errno=EINVAL;
    return (uint64) -1; /* this is really gross */
  }
  return((uint64)lseek((int)fd,off_io,whence));
}

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

static uint64
_tiffSizeProc(thandle_t fd)
{
  struct stat sb;
  if (fstat((int)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) {
    *pbase = (void*)
        mmap(0, (size_t)sizem, PROT_READ, MAP_SHARED, (int) 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;

  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, 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, "%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) {
      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)
{
  return (malloc((size_t) s));
}

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:
 */
