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- #ifndef lint
- static char rcsid[] = "$Header: /usr/people/sam/tiff/libtiff/RCS/tif_unix.c,v 1.6 93/08/25 09:34:24 sam Exp $";
- #endif
-
- /*
- * Copyright (c) 1988, 1989, 1990, 1991, 1992 Sam Leffler
- * Copyright (c) 1991, 1992 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.
- */
- #include "tiffiop.h"
- #include <unistd.h>
- #include <stdlib.h>
-
- static tsize_t
- _tiffReadProc(thandle_t fd, tdata_t buf, tsize_t size)
- {
- return (read((int) fd, buf, (size_t) size));
- }
-
- static tsize_t
- _tiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size)
- {
- return (write((int) fd, buf, (size_t) size));
- }
-
- static toff_t
- _tiffSeekProc(thandle_t fd, off_t off, int whence)
- {
- return ((toff_t) lseek((int) fd, (off_t) off, whence));
- }
-
- static int
- _tiffCloseProc(thandle_t fd)
- {
- return (close((int) fd));
- }
-
- #include <sys/stat.h>
-
- static toff_t
- _tiffSizeProc(thandle_t fd)
- {
- #ifdef _AM29K
- long fsize;
- return ((fsize = lseek((int) fd, 0, SEEK_END)) < 0 ? 0 : fsize);
- #else
- struct stat sb;
- return (toff_t) (fstat((int) fd, &sb) < 0 ? 0 : sb.st_size);
- #endif
- }
-
- #ifdef MMAP_SUPPORT
- #include <sys/mman.h>
-
- static int
- _tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
- {
- toff_t size = _tiffSizeProc(fd);
- if (size != (toff_t) -1) {
- *pbase = (tdata_t)
- mmap(0, size, PROT_READ, MAP_SHARED, (int) fd, 0);
- if (*pbase != (tdata_t) -1) {
- *psize = size;
- return (1);
- }
- }
- return (0);
- }
-
- static void
- _tiffUnmapProc(thandle_t fd, tdata_t base, toff_t size)
- {
- (void) munmap(base, (off_t) size);
- }
- #else /* !MMAP_SUPPORT */
- static int
- _tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
- {
- return (0);
- }
-
- static void
- _tiffUnmapProc(thandle_t fd, tdata_t base, toff_t size)
- {
- }
- #endif /* !MMAP_SUPPORT */
-
- /*
- * Open a TIFF file descriptor for read/writing.
- */
- TIFF*
- TIFFFdOpen(int fd, const char* name, const char* mode)
- {
- TIFF* tif;
-
- tif = TIFFClientOpen(name, mode,
- (thandle_t) fd,
- _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;
-
- m = _TIFFgetMode(mode, module);
- if (m == -1)
- return ((TIFF*)0);
- #ifdef _AM29K
- fd = open(name, m);
- #else
- fd = open(name, m, 0666);
- #endif
- if (fd < 0) {
- TIFFError(module, "%s: Cannot open", name);
- return ((TIFF *)0);
- }
- return (TIFFFdOpen(fd, name, mode));
- }
-
- void*
- _TIFFmalloc(size_t s)
- {
- return (malloc(s));
- }
-
- void
- _TIFFfree(void* p)
- {
- free(p);
- }
-
- void*
- _TIFFrealloc(void* p, size_t s)
- {
- return (realloc(p, s));
- }
-