/* Header */

/*
 * 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 Windows 3.x-specific Routines.
 */
#include "tiffiop.h"
#if defined(__WATCOMC__) || defined(__BORLANDC__) || defined(_MSC_VER)
#include <io.h>   /* for open, close, etc. function prototypes */
#endif

#include <windows.h>
#include <windowsx.h>
#include <memory.h>

static tsize_t 
_tiffReadProc(thandle_t fd, tdata_t buf, tsize_t size)
{
  return (_hread(fd, buf, size));
}

static tsize_t
_tiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size)
{
  return (_hwrite(fd, buf, size));
}

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

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

#include <sys/stat.h>

static toff_t
_tiffSizeProc(thandle_t fd)
{
  struct stat sb;
  return (fstat((int) fd, &sb) < 0 ? 0 : sb.st_size);
}

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, fd;
  OFSTRUCT of;
  int mm = 0;

  m = _TIFFgetMode(mode, module);
  if (m == -1)
    return ((TIFF*)0);
  if (m & O_CREAT) {
    if ((m & O_TRUNC) || OpenFile(name, &of, OF_EXIST) != HFILE_ERROR)
      mm |= OF_CREATE;
  }
  if (m & O_WRONLY)
    mm |= OF_WRITE;
  if (m & O_RDWR)
    mm |= OF_READWRITE;
  fd = OpenFile(name, &of, mm);
  if (fd < 0) {
    TIFFErrorExt(0, module, "%s: Cannot open", name);
    return ((TIFF*)0);
  }
  return (TIFFFdOpen(fd, name, mode));
}

tdata_t
_TIFFmalloc(tsize_t s)
{
  return (tdata_t) GlobalAllocPtr(GHND, (DWORD) s);
}

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

tdata_t
_TIFFrealloc(tdata_t p, tsize_t s)
{
  return (tdata_t) GlobalReAllocPtr(p, (DWORD) s, GHND);
}

void
_TIFFmemset(tdata_t p, int v, tsize_t c)
{
  char* pp = (char*) p;

  while (c > 0) {
    tsize_t chunk = 0x10000 - ((uint32) pp & 0xffff);/* What's left in segment */
    if (chunk > 0xff00)       /* No more than 0xff00 */
      chunk = 0xff00;
    if (chunk > c)          /* No more than needed */
      chunk = c;
    memset(pp, v, chunk);
    pp = (char*) (chunk + (char huge*) pp);
    c -= chunk;
  }
}

void
_TIFFmemcpy(tdata_t d, const tdata_t s, tsize_t c)
{
  if (c > 0xFFFF)
    hmemcpy((void _huge*) d, (void _huge*) s, c);
  else
    (void) memcpy(d, s, (size_t) c);
}

int
_TIFFmemcmp(const tdata_t d, const tdata_t s, tsize_t c)
{
  char* dd = (char*) d;
  char* ss = (char*) s;
  tsize_t chunks, chunkd, chunk;
  int result;

  while (c > 0) {
    chunks = 0x10000 - ((uint32) ss & 0xffff);  /* What's left in segment */
    chunkd = 0x10000 - ((uint32) dd & 0xffff);  /* What's left in segment */
    chunk = c;          /* Get the largest of     */
    if (chunk > chunks)       /*   c, chunks, chunkd,   */
      chunk = chunks;       /*   0xff00               */
    if (chunk > chunkd)
      chunk = chunkd;
    if (chunk > 0xff00)
      chunk = 0xff00;
    result = memcmp(dd, ss, chunk);
    if (result != 0)
      return (result);
    dd = (char*) (chunk + (char huge*) dd);
    ss = (char*) (chunk + (char huge*) ss);
    c -= chunk;
  }
  return (0);
}

static void
win3WarningHandler(const char* module, const char* fmt, va_list ap)
{
  char e[512] = { '\0' };
  if (module != NULL)
    strcat(strcpy(e, module), ":");
  vsprintf(e+strlen(e), fmt, ap);
  strcat(e, ".");
  MessageBox(GetActiveWindow(), e, "LibTIFF Warning",
      MB_OK|MB_ICONEXCLAMATION);
}
TIFFErrorHandler _TIFFwarningHandler = win3WarningHandler;

static void
win3ErrorHandler(const char* module, const char* fmt, va_list ap)
{
  char e[512] = { '\0' };
  if (module != NULL)
    strcat(strcpy(e, module), ":");
  vsprintf(e+strlen(e), fmt, ap);
  strcat(e, ".");
  MessageBox(GetActiveWindow(), e, "LibTIFF Error", MB_OK|MB_ICONSTOP);
}
TIFFErrorHandler _TIFFerrorHandler = win3ErrorHandler;
