tif_unix.c

Go to the documentation of this file.

/*
 * 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 UNIX-specific Routines. These are should also work with the
 * Windows Common RunTime Library.
 */
 
#include "tif_config.h"
 
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
 
#include <errno.h>
 
#include <stdarg.h>
#include <stdlib.h>
#include <sys/stat.h>
 
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
 
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif
 
#ifdef HAVE_IO_H
# include <io.h>
#endif
 
#include "tiffiop.h"
 
 
#define TIFF_IO_MAX 2147483647U
 
 
typedef union fd_as_handle_union
{
    int fd;
    thandle_t h;
} fd_as_handle_union_t;
 
static tmsize_t
_tiffReadProc(thandle_t fd, void* buf, tmsize_t size)
{
    fd_as_handle_union_t fdh;
        const size_t bytes_total = (size_t) size;
        size_t bytes_read;
        tmsize_t count = -1;
    if ((tmsize_t) bytes_total != size)
    {
        errno=EINVAL;
        return (tmsize_t) -1;
    }
    fdh.h = fd;
        for (bytes_read=0; bytes_read < bytes_total; bytes_read+=count)
        {
                char *buf_offset = (char *) buf+bytes_read;
                size_t io_size = bytes_total-bytes_read;
                if (io_size > TIFF_IO_MAX)
                        io_size = TIFF_IO_MAX;
                count=read(fdh.fd, buf_offset, (TIFFIOSize_t) io_size);
                if (count <= 0)
                        break;
        }
        if (count < 0)
                return (tmsize_t)-1;
        return (tmsize_t) bytes_read;
}
 
static tmsize_t
_tiffWriteProc(thandle_t fd, void* buf, tmsize_t size)
{
    fd_as_handle_union_t fdh;
    const size_t bytes_total = (size_t) size;
        size_t bytes_written;
        tmsize_t count = -1;
    if ((tmsize_t) bytes_total != size)
    {
        errno=EINVAL;
        return (tmsize_t) -1;
    }
    fdh.h = fd;
        for (bytes_written=0; bytes_written < bytes_total; bytes_written+=count)
        {
                const char *buf_offset = (char *) buf+bytes_written;
                size_t io_size = bytes_total-bytes_written;
                if (io_size > TIFF_IO_MAX)
                        io_size = TIFF_IO_MAX;
                count=write(fdh.fd, buf_offset, (TIFFIOSize_t) io_size);
                if (count <= 0)
                        break;
        }
        if (count < 0)
                return (tmsize_t)-1;
        return (tmsize_t) bytes_written;
    /* return ((tmsize_t) write(fdh.fd, buf, bytes_total)); */
}
 
static uint64
_tiffSeekProc(thandle_t fd, uint64 off, int whence)
{
    fd_as_handle_union_t fdh;
    _TIFF_off_t off_io = (_TIFF_off_t) off;
    if ((uint64) off_io != off)
    {
        errno=EINVAL;
        return (uint64) -1; /* this is really gross */
    }
    fdh.h = fd;
    return((uint64)_TIFF_lseek_f(fdh.fd,off_io,whence));
}
 
static int
_tiffCloseProc(thandle_t fd)
{
    fd_as_handle_union_t fdh;
    fdh.h = fd;
    return(close(fdh.fd));
}
 
static uint64
_tiffSizeProc(thandle_t fd)
{
    _TIFF_stat_s sb;
    fd_as_handle_union_t fdh;
    fdh.h = fd;
    if (_TIFF_fstat_f(fdh.fd,&sb)<0)
        return(0);
    else
        return((uint64)sb.st_size);
}
 
#ifdef HAVE_MMAP
#include <sys/mman.h>
 
static int
_tiffMapProc(thandle_t fd, void** pbase, toff_t* psize)
{
    uint64 size64 = _tiffSizeProc(fd);
    tmsize_t sizem = (tmsize_t)size64;
    if ((uint64)sizem==size64) {
        fd_as_handle_union_t fdh;
        fdh.h = fd;
        *pbase = (void*)
            mmap(0, (size_t)sizem, PROT_READ, MAP_SHARED, fdh.fd, 0);
        if (*pbase != (void*) -1) {
            *psize = (tmsize_t)sizem;
            return (1);
        }
    }
    return (0);
}
 
static void
_tiffUnmapProc(thandle_t fd, void* base, toff_t size)
{
    (void) fd;
    (void) munmap(base, (off_t) size);
}
#else /* !HAVE_MMAP */
static int
_tiffMapProc(thandle_t fd, void** pbase, toff_t* psize)
{
    (void) fd; (void) pbase; (void) psize;
    return (0);
}
 
static void
_tiffUnmapProc(thandle_t fd, void* base, toff_t size)
{
    (void) fd; (void) base; (void) size;
}
#endif /* !HAVE_MMAP */
 
/*
 * Open a TIFF file descriptor for read/writing.
 */
TIFF*
TIFFFdOpen(int fd, const char* name, const char* mode)
{
    TIFF* tif;
 
    fd_as_handle_union_t fdh;
    fdh.fd = fd;
    tif = TIFFClientOpen(name, mode,
        fdh.h,
        _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;
    TIFF* tif;
 
    m = _TIFFgetMode(mode, module);
    if (m == -1)
        return ((TIFF*)0);
 
/* for cygwin and mingw */
#ifdef O_BINARY
    m |= O_BINARY;
#endif
 
    fd = open(name, m, 0666);
    if (fd < 0) {
        if (errno > 0 && strerror(errno) != NULL ) {
            TIFFErrorExt(0, module, "%s: %s", name, strerror(errno) );
        } else {
            TIFFErrorExt(0, module, "%s: Cannot open", name);
        }
        return ((TIFF *)0);
    }
 
    tif = TIFFFdOpen((int)fd, name, mode);
    if(!tif)
        close(fd);
    return tif;
}
 
#ifdef __WIN32__
#include <windows.h>
/*
 * 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";
    int m, fd;
    int mbsize;
    char *mbname;
    TIFF* tif;
 
    m = _TIFFgetMode(mode, module);
    if (m == -1)
        return ((TIFF*)0);
 
/* for cygwin and mingw */
#ifdef O_BINARY
    m |= O_BINARY;
#endif
 
    fd = _wopen(name, m, 0666);
    if (fd < 0) {
        TIFFErrorExt(0, module, "%ls: Cannot open", name);
        return ((TIFF *)0);
    }
 
    mbname = NULL;
    mbsize = WideCharToMultiByte(CP_ACP, 0, name, -1, NULL, 0, NULL, NULL);
    if (mbsize > 0) {
        mbname = _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);
    
    _TIFFfree(mbname);
    
    if(!tif)
        close(fd);
    return tif;
}
#endif
 
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));
}
 
static void
unixWarningHandler(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 = unixWarningHandler;
 
static void
unixErrorHandler(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 = unixErrorHandler;
 
/* vim: set ts=8 sts=8 sw=8 noet: */
 
/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 8
 * fill-column: 78
 * End:
 */