/* Id */

/*
 * 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
 */

#if defined ( _MSC_VER )
#pragma warning ( disable : 4115 )
#pragma warning(disable:4306) /* conversion from t1 to t2 of greater size */
#endif

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

void
TEXPORT
_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: */
