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+/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/Attic/tif_acorn.c,v 1.2.2.1 2010-06-08 18:50:41 bfriesen Exp $ */
+
+/*
+ * 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 RISC OS specific Routines.
+ * Developed out of the Unix version.
+ * Peter Greenham, May 1995
+ */
+#include "tiffiop.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+/*
+Low-level file handling
+~~~~~~~~~~~~~~~~~~~~~~~
+The functions in osfcn.h are unavailable when compiling under C, as it's a
+C++ header. Therefore they have been implemented here.
+
+Now, why have I done it this way?
+
+The definitive API library for RISC OS is Jonathan Coxhead's OSLib, which
+uses heavily optimised ARM assembler or even plain inline SWI calls for
+maximum performance and minimum runtime size. However, I don't want to make
+LIBTIFF need that to survive. Therefore I have also emulated the functions
+using macros to _swi() and _swix() defined in the swis.h header, and
+borrowing types from kernel.h, which is less efficient but doesn't need any
+third-party libraries.
+ */
+
+#ifdef INCLUDE_OSLIB
+
+#include "osfile.h"
+#include "osgbpb.h"
+#include "osargs.h"
+#include "osfind.h"
+
+#else
+
+/* OSLIB EMULATION STARTS */
+
+#include "kernel.h"
+#include "swis.h"
+
+/* From oslib:types.h */
+typedef unsigned int bits;
+typedef unsigned char byte;
+#ifndef TRUE
+#define TRUE 1
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+#ifndef NULL
+#define NULL 0
+#endif
+#ifndef SKIP
+#define SKIP 0
+#endif
+
+/* From oslib:os.h */
+typedef _kernel_oserror os_error;
+typedef byte os_f;
+
+/* From oslib:osfile.h */
+#undef OS_File
+#define OS_File 0x8
+
+/* From oslib:osgbpb.h */
+#undef OS_GBPB
+#define OS_GBPB 0xC
+#undef OSGBPB_Write
+#define OSGBPB_Write 0x2
+#undef OSGBPB_Read
+#define OSGBPB_Read 0x4
+
+extern os_error *xosgbpb_write (os_f file,
+ byte *data,
+ int size,
+ int *unwritten);
+extern int osgbpb_write (os_f file,
+ byte *data,
+ int size);
+
+#define xosgbpb_write(file, data, size, unwritten) \
+ (os_error*) _swix(OS_GBPB, _IN(0)|_IN(1)|_IN(2)|_IN(3)|_IN(4)|_OUT(3), \
+ OSGBPB_WriteAt, \
+ file, \
+ data, \
+ size, \
+ unwritten)
+
+#define osgbpb_write(file, data, size) \
+ _swi(OS_GBPB, _IN(0)|_IN(1)|_IN(2)|_IN(3)|_RETURN(3), \
+ OSGBPB_Write, \
+ file, \
+ data, \
+ size)
+
+extern os_error *xosgbpb_read (os_f file,
+ byte *buffer,
+ int size,
+ int *unread);
+extern int osgbpb_read (os_f file,
+ byte *buffer,
+ int size);
+
+#define xosgbpb_read(file, buffer, size, unread) \
+ (os_error*) _swix(OS_GBPB, _IN(0)|_IN(1)|_IN(2)|_IN(3)|_OUT(3), \
+ OSGBPB_Read, \
+ file, \
+ buffer, \
+ size, \
+ unread)
+
+#define osgbpb_read(file, buffer, size) \
+ _swi(OS_GBPB, _IN(0)|_IN(1)|_IN(2)|_IN(3)|_RETURN(3), \
+ OSGBPB_Read, \
+ file, \
+ buffer, \
+ size)
+
+/* From oslib:osfind.h */
+#undef OS_Find
+#define OS_Find 0xD
+#undef OSFind_Openin
+#define OSFind_Openin 0x40
+#undef OSFind_Openout
+#define OSFind_Openout 0x80
+#undef OSFind_Openup
+#define OSFind_Openup 0xC0
+#undef OSFind_Close
+#define OSFind_Close 0x0
+
+#define xosfind_open(reason, file_name, path, file) \
+ (os_error*) _swix(OS_Find, _IN(0)|_IN(1)|_IN(2)|_OUT(0), \
+ reason, file_name, path, file)
+
+#define osfind_open(reason, file_name, path) \
+ (os_f) _swi(OS_Find, _IN(0)|_IN(1)|_IN(2)|_RETURN(0), \
+ reason, file_name, path)
+
+extern os_error *xosfind_openin (bits flags,
+ char *file_name,
+ char *path,
+ os_f *file);
+extern os_f osfind_openin (bits flags,
+ char *file_name,
+ char *path);
+
+#define xosfind_openin(flags, file_name, path, file) \
+ xosfind_open(flags | OSFind_Openin, file_name, path, file)
+
+#define osfind_openin(flags, file_name, path) \
+ osfind_open(flags | OSFind_Openin, file_name, path)
+
+extern os_error *xosfind_openout (bits flags,
+ char *file_name,
+ char *path,
+ os_f *file);
+extern os_f osfind_openout (bits flags,
+ char *file_name,
+ char *path);
+
+#define xosfind_openout(flags, file_name, path, file) \
+ xosfind_open(flags | OSFind_Openout, file_name, path, file)
+
+#define osfind_openout(flags, file_name, path) \
+ osfind_open(flags | OSFind_Openout, file_name, path)
+
+extern os_error *xosfind_openup (bits flags,
+ char *file_name,
+ char *path,
+ os_f *file);
+extern os_f osfind_openup (bits flags,
+ char *file_name,
+ char *path);
+
+#define xosfind_openup(flags, file_name, path, file) \
+ xosfind_open(flags | OSFind_Openup, file_name, path, file)
+
+#define osfind_openup(flags, file_name, path) \
+ osfind_open(flags | OSFind_Openup, file_name, path)
+
+extern os_error *xosfind_close (os_f file);
+extern void osfind_close (os_f file);
+
+#define xosfind_close(file) \
+ (os_error*) _swix(OS_Find, _IN(0)|_IN(1), \
+ OSFind_Close, \
+ file)
+
+#define osfind_close(file) \
+ (void) _swi(OS_Find, _IN(0)|_IN(1), \
+ OSFind_Close, \
+ file)
+
+/* From oslib:osargs.h */
+#undef OS_Args
+#define OS_Args 0x9
+#undef OSArgs_ReadPtr
+#define OSArgs_ReadPtr 0x0
+#undef OSArgs_SetPtr
+#define OSArgs_SetPtr 0x1
+#undef OSArgs_ReadExt
+#define OSArgs_ReadExt 0x2
+
+extern os_error *xosargs_read_ptr (os_f file,
+ int *ptr);
+extern int osargs_read_ptr (os_f file);
+
+#define xosargs_read_ptr(file, ptr) \
+ (os_error*) _swix(OS_Args, _IN(0)|_IN(1)|_OUT(2), \
+ OSArgs_ReadPtr, \
+ file, \
+ ptr)
+
+#define osargs_read_ptr(file) \
+ _swi(OS_Args, _IN(0)|_IN(1)|_RETURN(2), \
+ OSArgs_ReadPtr, \
+ file)
+
+extern os_error *xosargs_set_ptr (os_f file,
+ int ptr);
+extern void osargs_set_ptr (os_f file,
+ int ptr);
+
+#define xosargs_set_ptr(file, ptr) \
+ (os_error*) _swix(OS_Args, _IN(0)|_IN(1)|_IN(2), \
+ OSArgs_SetPtr, \
+ file, \
+ ptr)
+
+#define osargs_set_ptr(file, ptr) \
+ (void) _swi(OS_Args, _IN(0)|_IN(1)|_IN(2), \
+ OSArgs_SetPtr, \
+ file, \
+ ptr)
+
+extern os_error *xosargs_read_ext (os_f file,
+ int *ext);
+extern int osargs_read_ext (os_f file);
+
+#define xosargs_read_ext(file, ext) \
+ (os_error*) _swix(OS_Args, _IN(0)|_IN(1)|_OUT(2), \
+ OSArgs_ReadExt, \
+ file, \
+ ext)
+
+#define osargs_read_ext(file) \
+ _swi(OS_Args, _IN(0)|_IN(1)|_RETURN(2), \
+ OSArgs_ReadExt, \
+ file)
+
+/* OSLIB EMULATION ENDS */
+
+#endif
+
+#ifndef __osfcn_h
+/* Will be set or not during tiffcomp.h */
+/* You get this to compile under C++? Please say how! */
+
+extern int open(const char* name, int flags, int mode)
+{
+ /* From what I can tell, should return <0 for failure */
+ os_error* e = (os_error*) 1; /* Cheeky way to use a pointer eh? :-) */
+ os_f file = (os_f) -1;
+
+ flags = flags;
+
+ switch(mode)
+ {
+ case O_RDONLY:
+ {
+ e = xosfind_openin(SKIP, name, SKIP, &file);
+ break;
+ }
+ case O_WRONLY:
+ case O_RDWR|O_CREAT:
+ case O_RDWR|O_CREAT|O_TRUNC:
+ {
+ e = xosfind_openout(SKIP, name, SKIP, &file);
+ break;
+ }
+ case O_RDWR:
+ {
+ e = xosfind_openup(SKIP, name, SKIP, &file);
+ break;
+ }
+ }
+ if (e)
+ {
+ file = (os_f) -1;
+ }
+ return (file);
+}
+
+extern int close(int fd)
+{
+ return ((int) xosfind_close((os_f) fd));
+}
+
+extern int write(int fd, const char *buf, int nbytes)
+{
+ /* Returns number of bytes written */
+ return (nbytes - osgbpb_write((os_f) fd, (const byte*) buf, nbytes));
+}
+
+extern int read(int fd, char *buf, int nbytes)
+{
+ /* Returns number of bytes read */
+ return (nbytes - osgbpb_read((os_f) fd, (byte*) buf, nbytes));
+}
+
+extern off_t lseek(int fd, off_t offset, int whence)
+{
+ int absolute = 0;
+
+ switch (whence)
+ {
+ case SEEK_SET:
+ {
+ absolute = (int) offset;
+ break;
+ }
+ case SEEK_CUR:
+ {
+ absolute = osargs_read_ptr((os_f) fd) + (int) offset;
+ break;
+ }
+ case SEEK_END:
+ {
+ absolute = osargs_read_ext((os_f) fd) + (int) offset;
+ break;
+ }
+ }
+
+ osargs_set_ptr((os_f) fd, absolute);
+
+ return ((off_t) osargs_read_ptr((os_f) fd));
+}
+#endif
+
+static tsize_t
+_tiffReadProc(thandle_t fd, tdata_t buf, tsize_t size)
+{
+ return ((tsize_t) read((int) fd, buf, (size_t) size));
+}
+
+static tsize_t
+_tiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size)
+{
+ return ((tsize_t) write((int) fd, buf, (size_t) size));
+}
+
+static toff_t
+_tiffSeekProc(thandle_t fd, toff_t off, int whence)
+{
+ return ((toff_t) lseek((int) fd, (off_t) off, whence));
+}
+
+static int
+_tiffCloseProc(thandle_t fd)
+{
+ return (close((int) fd));
+}
+
+static toff_t
+_tiffSizeProc(thandle_t fd)
+{
+ return (lseek((int) fd, SEEK_END, SEEK_SET));
+}
+
+#ifdef HAVE_MMAP
+#error "I didn't know Acorn had that!"
+#endif
+
+/* !HAVE_MMAP */
+static int
+_tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
+{
+ (void) fd; (void) pbase; (void) psize;
+ return (0);
+}
+
+static void
+_tiffUnmapProc(thandle_t fd, tdata_t base, toff_t size)
+{
+ (void) fd; (void) base; (void) size;
+}
+
+/*
+ * 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);
+ }
+
+ fd = open(name, 0, m);
+
+ if (fd < 0)
+ {
+ TIFFErrorExt(0, module, "%s: Cannot open", name);
+ return ((TIFF *)0);
+ }
+ return (TIFFFdOpen(fd, name, mode));
+}
+
+void*
+_TIFFmalloc(tsize_t s)
+{
+ return (malloc((size_t) s));
+}
+
+void
+_TIFFfree(tdata_t p)
+{
+ free(p);
+}
+
+void*
+_TIFFrealloc(tdata_t p, tsize_t s)
+{
+ return (realloc(p, (size_t) s));
+}
+
+void
+_TIFFmemset(tdata_t p, int v, tsize_t c)
+{
+ memset(p, v, (size_t) c);
+}
+
+void
+_TIFFmemcpy(tdata_t d, const tdata_t s, tsize_t c)
+{
+ memcpy(d, s, (size_t) c);
+}
+
+int
+_TIFFmemcmp(const tdata_t p1, const tdata_t p2, tsize_t c)
+{
+ return (memcmp(p1, p2, (size_t) c));
+}
+
+static void
+acornWarningHandler(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 = acornWarningHandler;
+
+static void
+acornErrorHandler(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 = acornErrorHandler;
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 8
+ * fill-column: 78
+ * End:
+ */