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- #ifndef lint
- static char rcsid[] = "$Header: /usr/people/sam/tiff/libtiff/RCS/tif_apple.c,v 1.13 93/08/25 09:15:36 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 Macintosh-specific routines.
- *
- * These routines use only Toolbox and high-level File Manager traps.
- * They make no calls to the THINK C "unix" compatibility library. Also,
- * malloc is not used directly but it is still referenced internally by
- * the ANSI library in rare cases. Heap fragmentation by the malloc ring
- * buffer is therefore minimized.
- *
- * O_RDONLY and O_RDWR are treated identically here. The tif_mode flag is
- * checked in TIFFWriteCheck().
- *
- * Create below fills in a blank creator signature and sets the file type
- * to 'TIFF'. It is much better for the application to do this by Create'ing
- * the file first and TIFFOpen'ing it later.
- */
-
- #include "tiffiop.h"
- #include <Errors.h>
- #include <Files.h>
- #include <Memory.h>
-
- #ifdef __MWERKS__
- #include <Strings.h>
- #endif
-
- #if defined(applec) || defined(__MWERKS__)
- #define CtoPstr c2pstr
- #endif
-
- static tsize_t
- _tiffReadProc(thandle_t fd, tdata_t buf, tsize_t size)
- {
- return (FSRead((short) fd, (long*) &size, (char*) buf) == noErr ?
- size : (tsize_t) -1);
- }
-
- static tsize_t
- _tiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size)
- {
- return (FSWrite((short) fd, (long*) &size, (char*) buf) == noErr ?
- size : (tsize_t) -1);
- }
-
- static toff_t
- _tiffSeekProc(thandle_t fd, toff_t off, int whence)
- {
- long fpos, size;
-
- if (GetEOF((short) fd, &size) != noErr)
- return EOF;
- (void) GetFPos((short) fd, &fpos);
-
- switch (whence) {
- case SEEK_CUR:
- if (off + fpos > size)
- SetEOF((short) fd, off + fpos);
- if (SetFPos((short) fd, fsFromMark, off) != noErr)
- return EOF;
- break;
- case SEEK_END:
- if (off > 0)
- SetEOF((short) fd, off + size);
- if (SetFPos((short) fd, fsFromStart, off + size) != noErr)
- return EOF;
- break;
- case SEEK_SET:
- if (off > size)
- SetEOF((short) fd, off);
- if (SetFPos((short) fd, fsFromStart, off) != noErr)
- return EOF;
- break;
- }
-
- return (toff_t)(GetFPos((short) fd, &fpos) == noErr ? fpos : EOF);
- }
-
- 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)
- {
- }
-
- static int
- _tiffCloseProc(thandle_t fd)
- {
- return (FSClose((short) fd));
- }
-
- static toff_t
- _tiffSizeProc(thandle_t fd)
- {
- long size;
-
- if (GetEOF((short) fd, &size) != noErr) {
- TIFFError("_tiffSizeProc", "%s: Cannot get file size");
- return (-1L);
- }
- return ((toff_t) size);
- }
-
- void *
- _TIFFmalloc(size_t s)
- {
- return (NewPtr(s));
- }
-
- void
- _TIFFfree(void* p)
- {
- DisposePtr(p);
- }
-
- void *
- _TIFFrealloc(void* p, size_t s)
- {
- Ptr n = p;
-
- SetPtrSize(p, s);
- if (MemError() && (n = NewPtr(s)) != NULL) {
- BlockMove(p, n, GetPtrSize(p));
- DisposePtr(p);
- }
- return (n);
- }
-
- /*
- * 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";
- Str255 pname;
- FInfo finfo;
- short fref;
- OSErr err;
-
- strcpy((char*) pname, name);
- CtoPstr((char*) pname);
-
- switch (_TIFFgetMode(mode, module)) {
- default:
- return ((TIFF*) 0);
- case O_RDWR | O_CREAT | O_TRUNC:
- if (GetFInfo(pname, 0, &finfo) == noErr)
- FSDelete(pname, 0);
- /* fall through */
- case O_RDWR | O_CREAT:
- if ((err = GetFInfo(pname, 0, &finfo)) == fnfErr) {
- if (Create(pname, 0, ' ', 'TIFF') != noErr)
- goto badCreate;
- if (FSOpen(pname, 0, &fref) != noErr)
- goto badOpen;
- } else if (err == noErr) {
- if (FSOpen(pname, 0, &fref) != noErr)
- goto badOpen;
- } else
- goto badOpen;
- break;
- case O_RDONLY:
- case O_RDWR:
- if (FSOpen(pname, 0, &fref) != noErr)
- goto badOpen;
- break;
- }
- return (TIFFFdOpen((int) fref, name, mode));
- badCreate:
- TIFFError(module, "%s: Cannot create", name);
- return ((TIFF*) 0);
- badOpen:
- TIFFError(module, "%s: Cannot open", name);
- return ((TIFF*) 0);
- }
-