/* $Id: tif_win32.c 4718 2009-08-07 15:17:36Z adcockj $ */

/*
 * 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 Win32-specific Routines.  Adapted from tif_unix.c 4/5/95 by
 * Scott Wagner (wagner@itek.com), Itek Graphix, Rochester, NY USA
 */
#include "tiffiop.h"

static tsize_t
_tiffReadProc(thandle_t fd, tdata_t buf, tsize_t size)
{
    DWORD dwSizeRead;
    if (!ReadFile(fd, buf, size, &dwSizeRead, NULL))
        return(0);
    return ((tsize_t) dwSizeRead);
}

static tsize_t
_tiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size)
{
    DWORD dwSizeWritten;
    if (!WriteFile(fd, buf, size, &dwSizeWritten, NULL))
        return(0);
    return ((tsize_t) dwSizeWritten);
}

static toff_t
_tiffSeekProc(thandle_t fd, toff_t off, int whence)
{
    DWORD dwMoveMethod, dwMoveHigh;

        /* we use this as a special code, so avoid accepting it */
        if( off == 0xFFFFFFFF )
            return 0xFFFFFFFF;
        
    switch(whence)
    {
    case SEEK_SET:
        dwMoveMethod = FILE_BEGIN;
        break;
    case SEEK_CUR:
        dwMoveMethod = FILE_CURRENT;
        break;
    case SEEK_END:
        dwMoveMethod = FILE_END;
        break;
    default:
        dwMoveMethod = FILE_BEGIN;
        break;
    }
        dwMoveHigh = 0;
    return ((toff_t)SetFilePointer(fd, (LONG) off, (PLONG)&dwMoveHigh,
                                       dwMoveMethod));
}

static int
_tiffCloseProc(thandle_t fd)
{
    return (CloseHandle(fd) ? 0 : -1);
}

static toff_t
_tiffSizeProc(thandle_t fd)
{
    return ((toff_t)GetFileSize(fd, NULL));
}

#ifdef __BORLANDC__
#pragma argsused
#endif
static int
_tiffDummyMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
{
    return (0);
}

/*
 * From "Hermann Josef Hill" <lhill@rhein-zeitung.de>:
 *
 * Windows uses both a handle and a pointer for file mapping,
 * but according to the SDK documentation and Richter's book
 * "Advanced Windows Programming" it is safe to free the handle
 * after obtaining the file mapping pointer
 *
 * This removes a nasty OS dependency and cures a problem
 * with Visual C++ 5.0
 */
static int
_tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
{
    toff_t size;
    HANDLE hMapFile;

    if ((size = _tiffSizeProc(fd)) == 0xFFFFFFFF)
        return (0);
    hMapFile = CreateFileMapping(fd, NULL, PAGE_READONLY, 0, size, NULL);
    if (hMapFile == NULL)
        return (0);
    *pbase = MapViewOfFile(hMapFile, FILE_MAP_READ, 0, 0, 0);
    CloseHandle(hMapFile);
    if (*pbase == NULL)
        return (0);
    *psize = size;
    return(1);
}

#ifdef __BORLANDC__
#pragma argsused
#endif
static void
_tiffDummyUnmapProc(thandle_t fd, tdata_t base, toff_t size)
{
}

static void
_tiffUnmapProc(thandle_t fd, tdata_t base, toff_t size)
{
    UnmapViewOfFile(base);
}

/*
 * Open a TIFF file descriptor for read/writing.
 * Note that TIFFFdOpen and TIFFOpen recognise the character 'u' in the mode
 * string, which forces the file to be opened unmapped.
 */
TIFF*
TIFFFdOpen(int ifd, const char* name, const char* mode)
{
    TIFF* tif;
    BOOL fSuppressMap = (mode[1] == 'u' || (mode[1]!=0 && mode[2] == 'u'));

    tif = TIFFClientOpen(name, mode, (thandle_t)ifd,
            _tiffReadProc, _tiffWriteProc,
            _tiffSeekProc, _tiffCloseProc, _tiffSizeProc,
            fSuppressMap ? _tiffDummyMapProc : _tiffMapProc,
            fSuppressMap ? _tiffDummyUnmapProc : _tiffUnmapProc);
    if (tif)
        tif->tif_fd = ifd;
    return (tif);
}

/*
 * Open a TIFF file for read/writing.
 */
TIFF*
TIFFOpen(const char* name, const char* mode)
{
    static const char module[] = "TIFFOpen";
    thandle_t fd;
    int m;
    DWORD dwMode;
    TIFF* tif;

    m = _TIFFgetMode(mode, module);

    switch(m)
    {
    case O_RDONLY:
        dwMode = OPEN_EXISTING;
        break;
    case O_RDWR:
        dwMode = OPEN_ALWAYS;
        break;
    case O_RDWR|O_CREAT:
        dwMode = OPEN_ALWAYS;
        break;
    case O_RDWR|O_TRUNC:
        dwMode = CREATE_ALWAYS;
        break;
    case O_RDWR|O_CREAT|O_TRUNC:
        dwMode = CREATE_ALWAYS;
        break;
    default:
        return ((TIFF*)0);
    }
    fd = (thandle_t)CreateFileA(name,
        (m == O_RDONLY)?GENERIC_READ:(GENERIC_READ | GENERIC_WRITE),
        FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, dwMode,
        (m == O_RDONLY)?FILE_ATTRIBUTE_READONLY:FILE_ATTRIBUTE_NORMAL,
        NULL);
    if (fd == INVALID_HANDLE_VALUE) {
        TIFFErrorExt(0, module, "%s: Cannot open", name);
        return ((TIFF *)0);
    }

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

/*
 * 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";
    thandle_t fd;
    int m;
    DWORD dwMode;
    int mbsize;
    char *mbname;
    TIFF *tif;

    m = _TIFFgetMode(mode, module);

    switch(m) {
        case O_RDONLY:            dwMode = OPEN_EXISTING; break;
        case O_RDWR:            dwMode = OPEN_ALWAYS;   break;
        case O_RDWR|O_CREAT:        dwMode = OPEN_ALWAYS;   break;
        case O_RDWR|O_TRUNC:        dwMode = CREATE_ALWAYS; break;
        case O_RDWR|O_CREAT|O_TRUNC:    dwMode = CREATE_ALWAYS; break;
        default:            return ((TIFF*)0);
    }

    fd = (thandle_t)CreateFileW(name,
        (m == O_RDONLY)?GENERIC_READ:(GENERIC_READ|GENERIC_WRITE),
        FILE_SHARE_READ, NULL, dwMode,
        (m == O_RDONLY)?FILE_ATTRIBUTE_READONLY:FILE_ATTRIBUTE_NORMAL,
        NULL);
    if (fd == INVALID_HANDLE_VALUE) {
        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 = (char *)_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);
    if(!tif)
        CloseHandle(fd);

    _TIFFfree(mbname);

    return tif;
}

tdata_t
_TIFFmalloc(tsize_t s)
{
    return ((tdata_t)GlobalAlloc(GMEM_FIXED, s));
}

void
_TIFFfree(tdata_t p)
{
    GlobalFree(p);
    return;
}

tdata_t
_TIFFrealloc(tdata_t p, tsize_t s)
{
        void* pvTmp;
        tsize_t old;

        if(p == NULL)
                return ((tdata_t)GlobalAlloc(GMEM_FIXED, s));

        old = GlobalSize(p);

        if (old>=s) {
                if ((pvTmp = GlobalAlloc(GMEM_FIXED, s)) != NULL) {
                    CopyMemory(pvTmp, p, s);
                    GlobalFree(p);
                }
        } else {
                if ((pvTmp = GlobalAlloc(GMEM_FIXED, s)) != NULL) {
                    CopyMemory(pvTmp, p, old);
                    GlobalFree(p);
                }
        }
        return ((tdata_t)pvTmp);
}

void
_TIFFmemset(void* p, int v, tsize_t c)
{
    FillMemory(p, c, (BYTE)v);
}

void
_TIFFmemcpy(void* d, const tdata_t s, tsize_t c)
{
    CopyMemory(d, s, c);
}

int
_TIFFmemcmp(const tdata_t p1, const tdata_t p2, tsize_t c)
{
    register const BYTE *pb1 = (const BYTE *) p1;
    register const BYTE *pb2 = (const BYTE *) p2;
    register DWORD dwTmp = c;
    register int iTmp;
    for (iTmp = 0; dwTmp-- && !iTmp; iTmp = (int)*pb1++ - (int)*pb2++)
        ;
    return (iTmp);
}

static void
Win32WarningHandler(const char* module, const char* fmt, va_list ap)
{
#ifndef TIF_PLATFORM_CONSOLE
    LPTSTR szTitle;
    LPTSTR szTmp;
    LPCTSTR szTitleText = "%s Warning";
    LPCTSTR szDefaultModule = "LIBTIFF";
    LPCTSTR szTmpModule = (module == NULL) ? szDefaultModule : module;
    if ((szTitle = (LPTSTR)LocalAlloc(LMEM_FIXED, (strlen(szTmpModule) +
        strlen(szTitleText) + strlen(fmt) + 128)*sizeof(char))) == NULL)
        return;
    sprintf(szTitle, szTitleText, szTmpModule);
    szTmp = szTitle + (strlen(szTitle)+2)*sizeof(char);
    vsprintf(szTmp, fmt, ap);
    MessageBoxA(GetFocus(), szTmp, szTitle, MB_OK | MB_ICONINFORMATION);
    LocalFree(szTitle);
    return;
#else
    if (module != NULL)
        fprintf(stderr, "%s: ", module);
    fprintf(stderr, "Warning, ");
    vfprintf(stderr, fmt, ap);
    fprintf(stderr, ".\n");
#endif        
}
TIFFErrorHandler _TIFFwarningHandler = Win32WarningHandler;

static void
Win32ErrorHandler(const char* module, const char* fmt, va_list ap)
{
#ifndef TIF_PLATFORM_CONSOLE
    LPTSTR szTitle;
    LPTSTR szTmp;
    LPCTSTR szTitleText = "%s Error";
    LPCTSTR szDefaultModule = "LIBTIFF";
    LPCTSTR szTmpModule = (module == NULL) ? szDefaultModule : module;
    if ((szTitle = (LPTSTR)LocalAlloc(LMEM_FIXED, (strlen(szTmpModule) +
        strlen(szTitleText) + strlen(fmt) + 128)*sizeof(char))) == NULL)
        return;
    sprintf(szTitle, szTitleText, szTmpModule);
    szTmp = szTitle + (strlen(szTitle)+2)*sizeof(char);
    vsprintf(szTmp, fmt, ap);
    MessageBoxA(GetFocus(), szTmp, szTitle, MB_OK | MB_ICONEXCLAMATION);
    LocalFree(szTitle);
    return;
#else
    if (module != NULL)
        fprintf(stderr, "%s: ", module);
    vfprintf(stderr, fmt, ap);
    fprintf(stderr, ".\n");
#endif        
}
TIFFErrorHandler _TIFFerrorHandler = Win32ErrorHandler;

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