438 lines
10 KiB
C
438 lines
10 KiB
C
/*
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* Copyright (c) 1988-1997 Sam Leffler
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* Copyright (c) 1991-1997 Silicon Graphics, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee, provided
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* that (i) the above copyright notices and this permission notice appear in
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* all copies of the software and related documentation, and (ii) the names of
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* Sam Leffler and Silicon Graphics may not be used in any advertising or
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* publicity relating to the software without the specific, prior written
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* permission of Sam Leffler and Silicon Graphics.
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*
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* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
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* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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*
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* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
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* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
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* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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/*
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* TIFF Library Win32-specific Routines. Adapted from tif_unix.c 4/5/95 by
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* Scott Wagner (wagner@itek.com), Itek Graphix, Rochester, NY USA
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*/
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#include "tiffiop.h"
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#include <windows.h>
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/*
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CreateFileA/CreateFileW return type 'HANDLE' while TIFFFdOpen() takes 'int',
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which is formally incompatible and can even seemingly be of different size:
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HANDLE is 64 bit under Win64, while int is still 32 bits there.
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However, only the lower 32 bits of a HANDLE are significant under Win64 as,
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for interoperability reasons, they must have the same values in 32- and
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64-bit programs running on the same system, see
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https://docs.microsoft.com/en-us/windows/win32/winprog64/interprocess-communication
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Because of this, it is safe to define the following trivial functions for
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casting between ints and HANDLEs, which are only really needed to avoid
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compiler warnings (and, perhaps, to make the code slightly more clear).
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Note that using the intermediate cast to "intptr_t" is crucial for warning
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avoidance, as this integer type has the same size as HANDLE in all builds.
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*/
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static inline thandle_t thandle_from_int(int ifd)
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{
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return (thandle_t)(intptr_t)ifd;
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}
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static inline int thandle_to_int(thandle_t fd)
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{
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return (int)(intptr_t)fd;
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}
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static tmsize_t
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_tiffReadProc(thandle_t fd, void* buf, tmsize_t size)
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{
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/* tmsize_t is 64bit on 64bit systems, but the WinAPI ReadFile takes
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* 32bit sizes, so we loop through the data in suitable 32bit sized
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* chunks */
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uint8_t* ma;
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uint64_t mb;
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DWORD n;
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DWORD o;
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tmsize_t p;
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ma=(uint8_t*)buf;
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mb=size;
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p=0;
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while (mb>0)
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{
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n=0x80000000UL;
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if ((uint64_t)n>mb)
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n=(DWORD)mb;
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if (!ReadFile(fd,(LPVOID)ma,n,&o,NULL))
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return(0);
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ma+=o;
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mb-=o;
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p+=o;
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if (o!=n)
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break;
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}
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return(p);
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}
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static tmsize_t
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_tiffWriteProc(thandle_t fd, void* buf, tmsize_t size)
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{
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/* tmsize_t is 64bit on 64bit systems, but the WinAPI WriteFile takes
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* 32bit sizes, so we loop through the data in suitable 32bit sized
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* chunks */
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uint8_t* ma;
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uint64_t mb;
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DWORD n;
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DWORD o;
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tmsize_t p;
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ma=(uint8_t*)buf;
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mb=size;
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p=0;
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while (mb>0)
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{
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n=0x80000000UL;
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if ((uint64_t)n>mb)
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n=(DWORD)mb;
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if (!WriteFile(fd,(LPVOID)ma,n,&o,NULL))
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return(0);
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ma+=o;
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mb-=o;
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p+=o;
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if (o!=n)
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break;
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}
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return(p);
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}
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static uint64_t
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_tiffSeekProc(thandle_t fd, uint64_t off, int whence)
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{
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LARGE_INTEGER offli;
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DWORD dwMoveMethod;
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offli.QuadPart = off;
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switch(whence)
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{
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case SEEK_SET:
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dwMoveMethod = FILE_BEGIN;
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break;
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case SEEK_CUR:
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dwMoveMethod = FILE_CURRENT;
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break;
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case SEEK_END:
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dwMoveMethod = FILE_END;
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break;
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default:
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dwMoveMethod = FILE_BEGIN;
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break;
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}
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offli.LowPart=SetFilePointer(fd,offli.LowPart,&offli.HighPart,dwMoveMethod);
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if ((offli.LowPart==INVALID_SET_FILE_POINTER)&&(GetLastError()!=NO_ERROR))
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offli.QuadPart=0;
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return(offli.QuadPart);
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}
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static int
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_tiffCloseProc(thandle_t fd)
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{
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return (CloseHandle(fd) ? 0 : -1);
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}
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static uint64_t
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_tiffSizeProc(thandle_t fd)
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{
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LARGE_INTEGER m;
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if (GetFileSizeEx(fd,&m))
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return(m.QuadPart);
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else
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return(0);
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}
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static int
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_tiffDummyMapProc(thandle_t fd, void** pbase, toff_t* psize)
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{
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(void) fd;
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(void) pbase;
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(void) psize;
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return (0);
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}
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/*
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* From "Hermann Josef Hill" <lhill@rhein-zeitung.de>:
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*
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* Windows uses both a handle and a pointer for file mapping,
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* but according to the SDK documentation and Richter's book
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* "Advanced Windows Programming" it is safe to free the handle
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* after obtaining the file mapping pointer
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*
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* This removes a nasty OS dependency and cures a problem
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* with Visual C++ 5.0
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*/
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static int
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_tiffMapProc(thandle_t fd, void** pbase, toff_t* psize)
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{
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uint64_t size;
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tmsize_t sizem;
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HANDLE hMapFile;
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size = _tiffSizeProc(fd);
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sizem = (tmsize_t)size;
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if (!size || (uint64_t)sizem!=size)
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return (0);
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/* By passing in 0 for the maximum file size, it specifies that we
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create a file mapping object for the full file size. */
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hMapFile = CreateFileMapping(fd, NULL, PAGE_READONLY, 0, 0, NULL);
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if (hMapFile == NULL)
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return (0);
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*pbase = MapViewOfFile(hMapFile, FILE_MAP_READ, 0, 0, 0);
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CloseHandle(hMapFile);
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if (*pbase == NULL)
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return (0);
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*psize = size;
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return(1);
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}
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static void
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_tiffDummyUnmapProc(thandle_t fd, void* base, toff_t size)
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{
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(void) fd;
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(void) base;
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(void) size;
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}
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static void
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_tiffUnmapProc(thandle_t fd, void* base, toff_t size)
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{
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(void) fd;
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(void) size;
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UnmapViewOfFile(base);
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}
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/*
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* Open a TIFF file descriptor for read/writing.
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* Note that TIFFFdOpen and TIFFOpen recognise the character 'u' in the mode
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* string, which forces the file to be opened unmapped.
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*/
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TIFF*
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TIFFFdOpen(int ifd, const char* name, const char* mode)
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{
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TIFF* tif;
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int fSuppressMap;
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int m;
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fSuppressMap=0;
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for (m=0; mode[m]!=0; m++)
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{
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if (mode[m]=='u')
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{
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fSuppressMap=1;
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break;
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}
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}
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tif = TIFFClientOpen(name, mode, thandle_from_int(ifd),
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_tiffReadProc, _tiffWriteProc,
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_tiffSeekProc, _tiffCloseProc, _tiffSizeProc,
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fSuppressMap ? _tiffDummyMapProc : _tiffMapProc,
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fSuppressMap ? _tiffDummyUnmapProc : _tiffUnmapProc);
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if (tif)
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tif->tif_fd = ifd;
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return (tif);
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}
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#ifndef _WIN32_WCE
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/*
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* Open a TIFF file for read/writing.
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*/
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TIFF*
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TIFFOpen(const char* name, const char* mode)
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{
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static const char module[] = "TIFFOpen";
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thandle_t fd;
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int m;
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DWORD dwMode;
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TIFF* tif;
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m = _TIFFgetMode(mode, module);
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switch(m) {
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case O_RDONLY: dwMode = OPEN_EXISTING; break;
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case O_RDWR: dwMode = OPEN_ALWAYS; break;
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case O_RDWR|O_CREAT: dwMode = OPEN_ALWAYS; break;
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case O_RDWR|O_TRUNC: dwMode = CREATE_ALWAYS; break;
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case O_RDWR|O_CREAT|O_TRUNC: dwMode = CREATE_ALWAYS; break;
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default: return ((TIFF*)0);
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}
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fd = (thandle_t)CreateFileA(name,
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(m == O_RDONLY)?GENERIC_READ:(GENERIC_READ | GENERIC_WRITE),
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FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, dwMode,
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(m == O_RDONLY)?FILE_ATTRIBUTE_READONLY:FILE_ATTRIBUTE_NORMAL,
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NULL);
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if (fd == INVALID_HANDLE_VALUE) {
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TIFFErrorExt(0, module, "%s: Cannot open", name);
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return ((TIFF *)0);
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}
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tif = TIFFFdOpen(thandle_to_int(fd), name, mode);
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if(!tif)
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CloseHandle(fd);
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return tif;
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}
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/*
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* Open a TIFF file with a Unicode filename, for read/writing.
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*/
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TIFF*
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TIFFOpenW(const wchar_t* name, const char* mode)
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{
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static const char module[] = "TIFFOpenW";
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thandle_t fd;
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int m;
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DWORD dwMode;
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int mbsize;
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char *mbname;
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TIFF *tif;
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m = _TIFFgetMode(mode, module);
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switch(m) {
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case O_RDONLY: dwMode = OPEN_EXISTING; break;
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case O_RDWR: dwMode = OPEN_ALWAYS; break;
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case O_RDWR|O_CREAT: dwMode = OPEN_ALWAYS; break;
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case O_RDWR|O_TRUNC: dwMode = CREATE_ALWAYS; break;
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case O_RDWR|O_CREAT|O_TRUNC: dwMode = CREATE_ALWAYS; break;
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default: return ((TIFF*)0);
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}
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fd = (thandle_t)CreateFileW(name,
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(m == O_RDONLY)?GENERIC_READ:(GENERIC_READ|GENERIC_WRITE),
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FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, dwMode,
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(m == O_RDONLY)?FILE_ATTRIBUTE_READONLY:FILE_ATTRIBUTE_NORMAL,
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NULL);
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if (fd == INVALID_HANDLE_VALUE) {
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TIFFErrorExt(0, module, "%S: Cannot open", name);
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return ((TIFF *)0);
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}
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mbname = NULL;
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mbsize = WideCharToMultiByte(CP_ACP, 0, name, -1, NULL, 0, NULL, NULL);
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if (mbsize > 0) {
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mbname = (char *)_TIFFmalloc(mbsize);
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if (!mbname) {
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TIFFErrorExt(0, module,
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"Can't allocate space for filename conversion buffer");
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return ((TIFF*)0);
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}
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WideCharToMultiByte(CP_ACP, 0, name, -1, mbname, mbsize,
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NULL, NULL);
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}
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tif = TIFFFdOpen(thandle_to_int(fd),
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(mbname != NULL) ? mbname : "<unknown>", mode);
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if(!tif)
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CloseHandle(fd);
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_TIFFfree(mbname);
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return tif;
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}
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#endif /* ndef _WIN32_WCE */
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void*
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_TIFFmalloc(tmsize_t s)
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{
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if (s == 0)
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return ((void *) NULL);
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return (malloc((size_t) s));
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}
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void* _TIFFcalloc(tmsize_t nmemb, tmsize_t siz)
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{
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if( nmemb == 0 || siz == 0 )
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return ((void *) NULL);
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return calloc((size_t) nmemb, (size_t)siz);
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}
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void
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_TIFFfree(void* p)
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{
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free(p);
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}
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void*
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_TIFFrealloc(void* p, tmsize_t s)
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{
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return (realloc(p, (size_t) s));
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}
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void
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_TIFFmemset(void* p, int v, tmsize_t c)
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{
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memset(p, v, (size_t) c);
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}
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void
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_TIFFmemcpy(void* d, const void* s, tmsize_t c)
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{
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memcpy(d, s, (size_t) c);
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}
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int
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_TIFFmemcmp(const void* p1, const void* p2, tmsize_t c)
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{
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return (memcmp(p1, p2, (size_t) c));
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}
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#ifndef _WIN32_WCE
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static void
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Win32WarningHandler(const char* module, const char* fmt, va_list ap)
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{
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if (module != NULL)
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fprintf(stderr, "%s: ", module);
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fprintf(stderr, "Warning, ");
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, ".\n");
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}
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TIFFErrorHandler _TIFFwarningHandler = Win32WarningHandler;
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static void
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Win32ErrorHandler(const char* module, const char* fmt, va_list ap)
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{
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if (module != NULL)
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fprintf(stderr, "%s: ", module);
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, ".\n");
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}
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TIFFErrorHandler _TIFFerrorHandler = Win32ErrorHandler;
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#endif /* ndef _WIN32_WCE */
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/* vim: set ts=8 sts=8 sw=8 noet: */
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/*
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* Local Variables:
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* mode: c
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* c-basic-offset: 8
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* fill-column: 78
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* End:
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*/
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