/* $Header: /cvsroot/Insight/Insight/Utilities/tiff/tif_apple.c,v 1.2 2005/09/16 19:53:39 jjomier 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 Macintosh-specific routines.
 *
 * These routines use only Toolbox and high-level File Manager traps.
 * They make no calls to the THINK C "unix" compatibility library.  Also,
 * malloc is not used directly but it is still referenced internally by
 * the ANSI library in rare cases.  Heap fragmentation by the malloc ring
 * buffer is therefore minimized.
 *
 * O_RDONLY and O_RDWR are treated identically here.  The tif_mode flag is
 * checked in TIFFWriteCheck().
 *
 * Create below fills in a blank creator signature and sets the file type
 * to 'TIFF'.  It is much better for the application to do this by Create'ing
 * the file first and TIFFOpen'ing it later.
 * ---------
 * This code has been "Carbonized", and may not work with older MacOS versions.
 * If so, grab the tif_apple.c out of an older libtiff distribution, like
 * 3.5.5 from www.libtiff.org.
 */

#include "tiffiop.h"
#include <Errors.h>
#include <Files.h>
#include <Memory.h>
#include <Script.h>

#if defined(__PPCC__) || defined(__SC__) || defined(__MRC__) || defined(applec)
#define  CtoPstr  c2pstr
#endif

static tsize_t
_tiffReadProc(thandle_t fd, tdata_t buf, tsize_t size)
{
  return (FSRead((short) fd, (long*) &size, (char*) buf) == noErr ?
      size : (tsize_t) -1);
}

static tsize_t
_tiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size)
{
  return (FSWrite((short) fd, (long*) &size, (char*) buf) == noErr ?
      size : (tsize_t) -1);
}

static toff_t
_tiffSeekProc(thandle_t fd, toff_t off, int whence)
{
  long fpos, size;

  if (GetEOF((short) fd, &size) != noErr)
    return EOF;
  (void) GetFPos((short) fd, &fpos);

  switch (whence) {
  case SEEK_CUR:
    if (off + fpos > size)
      SetEOF((short) fd, off + fpos);
    if (SetFPos((short) fd, fsFromMark, off) != noErr)
      return EOF;
    break;
  case SEEK_END:
    if (off > 0)
      SetEOF((short) fd, off + size);
    if (SetFPos((short) fd, fsFromStart, off + size) != noErr)
      return EOF;
    break;
  case SEEK_SET:
    if (off > size)
      SetEOF((short) fd, off);
    if (SetFPos((short) fd, fsFromStart, off) != noErr)
      return EOF;
    break;
  }

  return (toff_t)(GetFPos((short) fd, &fpos) == noErr ? fpos : 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)
{
}

static int
_tiffCloseProc(thandle_t fd)
{
  return (FSClose((short) fd));
}

static toff_t
_tiffSizeProc(thandle_t fd)
{
  long size;

  if (GetEOF((short) fd, &size) != noErr) {
    TIFFError("_tiffSizeProc", "%s: Cannot get file size");
    return (-1L);
  }
  return ((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);
}

static void ourc2pstr( char* inString )
{
  int  sLen = strlen( inString );
  BlockMoveData( inString, &inString[1], sLen );
  inString[0] = sLen;
}

/*
 * Open a TIFF file for read/writing.
 */
TIFF*
TIFFOpen(const char* name, const char* mode)
{
  static const char module[] = "TIFFOpen";
  Str255 pname;
  FInfo finfo;
  short fref;
  OSErr err;
  FSSpec  fSpec;

  strcpy((char*) pname, name);
  ourc2pstr((char*) pname);
  
  err = FSMakeFSSpec( 0, 0, pname, &fSpec );

  switch (_TIFFgetMode(mode, module)) {
  default:
    return ((TIFF*) 0);
  case O_RDWR | O_CREAT | O_TRUNC:
    if (FSpGetFInfo(&fSpec, &finfo) == noErr)
      FSpDelete(&fSpec);
    /* fall through */
  case O_RDWR | O_CREAT:
    if ((err = FSpGetFInfo(&fSpec, &finfo)) == fnfErr) {
      if (FSpCreate(&fSpec, '    ', 'TIFF', smSystemScript) != noErr)
        goto badCreate;
      if (FSpOpenDF(&fSpec, fsRdWrPerm, &fref) != noErr)
        goto badOpen;
    } else if (err == noErr) {
      if (FSpOpenDF(&fSpec, fsRdWrPerm, &fref) != noErr)
        goto badOpen;
    } else
      goto badOpen;
    break;
  case O_RDONLY:
    if (FSpOpenDF(&fSpec, fsRdPerm, &fref) != noErr)
      goto badOpen;
    break;
  case O_RDWR:
    if (FSpOpenDF(&fSpec, fsRdWrPerm, &fref) != noErr)
      goto badOpen;
    break;
  }
  return (TIFFFdOpen((int) fref, name, mode));
badCreate:
  TIFFError(module, "%s: Cannot create", name);
  return ((TIFF*) 0);
badOpen:
  TIFFError(module, "%s: Cannot open", name);
  return ((TIFF*) 0);
}

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));
}

tdata_t
_TIFFmalloc(tsize_t s)
{
  return (NewPtr((size_t) s));
}

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

tdata_t
_TIFFrealloc(tdata_t p, tsize_t s)
{
  Ptr n = p;

  SetPtrSize(p, (size_t) s);
  if (MemError() && (n = NewPtr((size_t) s)) != NULL) {
    BlockMove(p, n, GetPtrSize(p));
    DisposePtr(p);
  }
  return ((tdata_t) n);
}

static void
appleWarningHandler(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 = appleWarningHandler;

static void
appleErrorHandler(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 = appleErrorHandler;
