tif_win32.c

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/*
 * 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
 */

/*
  CreateFileA/CreateFileW return type 'HANDLE'.

  thandle_t is declared like

    DECLARE_HANDLE(thandle_t);

  in tiffio.h.

  Windows (from winnt.h) DECLARE_HANDLE logic looks like

  #ifdef STRICT
    typedef void *HANDLE;
  #define DECLARE_HANDLE(name) struct name##__ { int unused; }; typedef struct name##__ *name
  #else
    typedef PVOID HANDLE;
  #define DECLARE_HANDLE(name) typedef HANDLE name
  #endif

  See http://bugzilla.maptools.org/show_bug.cgi?id=1941 for problems in WIN64
  builds resulting from this.  Unfortunately, the proposed patch was lost.

*/
  
#include <precomp.h>

#include <stdlib.h>
#include <windef.h>
#include <winbase.h>
#include <winuser.h>
#include <winnls.h>

static tmsize_t
_tiffReadProc(thandle_t fd, void* buf, tmsize_t size)
{
    /* tmsize_t is 64bit on 64bit systems, but the WinAPI ReadFile takes
     * 32bit sizes, so we loop through the data in suitable 32bit sized
     * chunks */
    uint8* ma;
    uint64 mb;
    DWORD n;
    DWORD o;
    tmsize_t p;
    ma=(uint8*)buf;
    mb=size;
    p=0;
    while (mb>0)
    {
        n=0x80000000UL;
        if ((uint64)n>mb)
            n=(DWORD)mb;
        if (!ReadFile(fd,(LPVOID)ma,n,&o,NULL))
            return(0);
        ma+=o;
        mb-=o;
        p+=o;
        if (o!=n)
            break;
    }
    return(p);
}

static tmsize_t
_tiffWriteProc(thandle_t fd, void* buf, tmsize_t size)
{
    /* tmsize_t is 64bit on 64bit systems, but the WinAPI WriteFile takes
     * 32bit sizes, so we loop through the data in suitable 32bit sized
     * chunks */
    uint8* ma;
    uint64 mb;
    DWORD n;
    DWORD o;
    tmsize_t p;
    ma=(uint8*)buf;
    mb=size;
    p=0;
    while (mb>0)
    {
        n=0x80000000UL;
        if ((uint64)n>mb)
            n=(DWORD)mb;
        if (!WriteFile(fd,(LPVOID)ma,n,&o,NULL))
            return(0);
        ma+=o;
        mb-=o;
        p+=o;
        if (o!=n)
            break;
    }
    return(p);
}

static uint64
_tiffSeekProc(thandle_t fd, uint64 off, int whence)
{
    LARGE_INTEGER offli;
    DWORD dwMoveMethod;
    offli.QuadPart = off;
    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;
    }
    offli.LowPart=SetFilePointer(fd,offli.LowPart,&offli.HighPart,dwMoveMethod);
    if ((offli.LowPart==INVALID_SET_FILE_POINTER)&&(GetLastError()!=NO_ERROR))
        offli.QuadPart=0;
    return(offli.QuadPart);
}

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

static uint64
_tiffSizeProc(thandle_t fd)
{
    ULARGE_INTEGER m;
    m.LowPart=GetFileSize(fd,&m.HighPart);
    return(m.QuadPart);
}

static int
_tiffDummyMapProc(thandle_t fd, void** pbase, toff_t* psize)
{
    (void) fd;
    (void) pbase;
    (void) 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, void** pbase, toff_t* psize)
{
    uint64 size;
    tmsize_t sizem;
    HANDLE hMapFile;

    size = _tiffSizeProc(fd);
    sizem = (tmsize_t)size;
    if ((uint64)sizem!=size)
        return (0);

    /* By passing in 0 for the maximum file size, it specifies that we
       create a file mapping object for the full file size. */
    hMapFile = CreateFileMapping(fd, NULL, PAGE_READONLY, 0, 0, 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);
}

static void
_tiffDummyUnmapProc(thandle_t fd, void* base, toff_t size)
{
    (void) fd;
    (void) base;
    (void) size;
}

static void
_tiffUnmapProc(thandle_t fd, void* base, toff_t size)
{
    (void) fd;
    (void) 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;
    int fSuppressMap;
    int m;
    fSuppressMap=0;
    for (m=0; mode[m]!=0; m++)
    {
        if (mode[m]=='u')
        {
            fSuppressMap=1;
            break;
        }
    }
    tif = TIFFClientOpen(name, mode, (thandle_t)ifd, /* FIXME: WIN64 cast to pointer warning */
            _tiffReadProc, _tiffWriteProc,
            _tiffSeekProc, _tiffCloseProc, _tiffSizeProc,
            fSuppressMap ? _tiffDummyMapProc : _tiffMapProc,
            fSuppressMap ? _tiffDummyUnmapProc : _tiffUnmapProc);
    if (tif)
        tif->tif_fd = ifd;
    return (tif);
}

#ifndef _WIN32_WCE

/*
 * 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);   /* FIXME: WIN64 cast from pointer to int warning */
    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 | 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);
    }

    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,    /* FIXME: WIN64 cast from pointer to int warning */
             (mbname != NULL) ? mbname : "<unknown>", mode);
    if(!tif)
        CloseHandle(fd);

    _TIFFfree(mbname);

    return tif;
}

#endif /* ndef _WIN32_WCE */

void*
_TIFFmalloc(tmsize_t s)
{
        if (s == 0)
                return ((void *) NULL);

    return (malloc((size_t) s));
}

void* _TIFFcalloc(tmsize_t nmemb, tmsize_t siz)
{
    if( nmemb == 0 || siz == 0 )
        return ((void *) NULL);

    return calloc((size_t) nmemb, (size_t)siz);
}

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));
}

#ifndef _WIN32_WCE

#if (_MSC_VER < 1500)
#  define vsnprintf _vsnprintf
#endif

static void
Win32WarningHandler(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 = Win32WarningHandler;

static void
Win32ErrorHandler(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 = Win32ErrorHandler;

#endif /* ndef _WIN32_WCE */

/* vim: set ts=8 sts=8 sw=8 noet: */
/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 8
 * fill-column: 78
 * End:
 */