520 lines
12 KiB
C
520 lines
12 KiB
C
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/Attic/tif_acorn.c,v 1.1 1999-07-27 21:50:27 mike Exp $ */
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/*
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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 RISC OS specific Routines.
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* Developed out of the Unix version.
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* Peter Greenham, May 1995
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*/
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#include "tiffiop.h"
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#include <stdio.h>
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#include <stdlib.h>
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/*
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Low-level file handling
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~~~~~~~~~~~~~~~~~~~~~~~
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The functions in osfcn.h are unavailable when compiling under C, as it's a
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C++ header. Therefore they have been implemented here.
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Now, why have I done it this way?
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The definitive API library for RISC OS is Jonathan Coxhead's OSLib, which
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uses heavily optimised ARM assembler or even plain inline SWI calls for
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maximum performance and minimum runtime size. However, I don't want to make
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LIBTIFF need that to survive. Therefore I have also emulated the functions
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using macros to _swi() and _swix() defined in the swis.h header, and
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borrowing types from kernel.h, which is less efficient but doesn't need any
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third-party libraries.
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*/
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#ifdef INCLUDE_OSLIB
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#include "osfile.h"
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#include "osgbpb.h"
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#include "osargs.h"
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#include "osfind.h"
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#else
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/* OSLIB EMULATION STARTS */
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#include "kernel.h"
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#include "swis.h"
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/* From oslib:types.h */
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typedef unsigned int bits;
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typedef unsigned char byte;
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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#ifndef NULL
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#define NULL 0
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#endif
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#ifndef SKIP
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#define SKIP 0
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#endif
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/* From oslib:os.h */
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typedef _kernel_oserror os_error;
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typedef byte os_f;
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/* From oslib:osfile.h */
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#undef OS_File
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#define OS_File 0x8
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/* From oslib:osgbpb.h */
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#undef OS_GBPB
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#define OS_GBPB 0xC
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#undef OSGBPB_Write
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#define OSGBPB_Write 0x2
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#undef OSGBPB_Read
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#define OSGBPB_Read 0x4
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extern os_error *xosgbpb_write (os_f file,
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byte *data,
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int size,
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int *unwritten);
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extern int osgbpb_write (os_f file,
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byte *data,
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int size);
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#define xosgbpb_write(file, data, size, unwritten) \
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(os_error*) _swix(OS_GBPB, _IN(0)|_IN(1)|_IN(2)|_IN(3)|_IN(4)|_OUT(3), \
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OSGBPB_WriteAt, \
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file, \
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data, \
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size, \
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unwritten)
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#define osgbpb_write(file, data, size) \
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_swi(OS_GBPB, _IN(0)|_IN(1)|_IN(2)|_IN(3)|_RETURN(3), \
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OSGBPB_Write, \
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file, \
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data, \
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size)
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extern os_error *xosgbpb_read (os_f file,
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byte *buffer,
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int size,
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int *unread);
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extern int osgbpb_read (os_f file,
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byte *buffer,
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int size);
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#define xosgbpb_read(file, buffer, size, unread) \
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(os_error*) _swix(OS_GBPB, _IN(0)|_IN(1)|_IN(2)|_IN(3)|_OUT(3), \
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OSGBPB_Read, \
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file, \
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buffer, \
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size, \
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unread)
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#define osgbpb_read(file, buffer, size) \
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_swi(OS_GBPB, _IN(0)|_IN(1)|_IN(2)|_IN(3)|_RETURN(3), \
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OSGBPB_Read, \
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file, \
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buffer, \
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size)
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/* From oslib:osfind.h */
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#undef OS_Find
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#define OS_Find 0xD
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#undef OSFind_Openin
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#define OSFind_Openin 0x40
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#undef OSFind_Openout
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#define OSFind_Openout 0x80
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#undef OSFind_Openup
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#define OSFind_Openup 0xC0
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#undef OSFind_Close
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#define OSFind_Close 0x0
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#define xosfind_open(reason, file_name, path, file) \
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(os_error*) _swix(OS_Find, _IN(0)|_IN(1)|_IN(2)|_OUT(0), \
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reason, file_name, path, file)
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#define osfind_open(reason, file_name, path) \
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(os_f) _swi(OS_Find, _IN(0)|_IN(1)|_IN(2)|_RETURN(0), \
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reason, file_name, path)
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extern os_error *xosfind_openin (bits flags,
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char *file_name,
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char *path,
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os_f *file);
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extern os_f osfind_openin (bits flags,
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char *file_name,
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char *path);
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#define xosfind_openin(flags, file_name, path, file) \
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xosfind_open(flags | OSFind_Openin, file_name, path, file)
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#define osfind_openin(flags, file_name, path) \
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osfind_open(flags | OSFind_Openin, file_name, path)
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extern os_error *xosfind_openout (bits flags,
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char *file_name,
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char *path,
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os_f *file);
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extern os_f osfind_openout (bits flags,
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char *file_name,
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char *path);
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#define xosfind_openout(flags, file_name, path, file) \
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xosfind_open(flags | OSFind_Openout, file_name, path, file)
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#define osfind_openout(flags, file_name, path) \
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osfind_open(flags | OSFind_Openout, file_name, path)
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extern os_error *xosfind_openup (bits flags,
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char *file_name,
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char *path,
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os_f *file);
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extern os_f osfind_openup (bits flags,
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char *file_name,
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char *path);
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#define xosfind_openup(flags, file_name, path, file) \
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xosfind_open(flags | OSFind_Openup, file_name, path, file)
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#define osfind_openup(flags, file_name, path) \
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osfind_open(flags | OSFind_Openup, file_name, path)
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extern os_error *xosfind_close (os_f file);
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extern void osfind_close (os_f file);
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#define xosfind_close(file) \
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(os_error*) _swix(OS_Find, _IN(0)|_IN(1), \
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OSFind_Close, \
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file)
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#define osfind_close(file) \
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(void) _swi(OS_Find, _IN(0)|_IN(1), \
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OSFind_Close, \
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file)
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/* From oslib:osargs.h */
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#undef OS_Args
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#define OS_Args 0x9
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#undef OSArgs_ReadPtr
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#define OSArgs_ReadPtr 0x0
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#undef OSArgs_SetPtr
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#define OSArgs_SetPtr 0x1
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#undef OSArgs_ReadExt
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#define OSArgs_ReadExt 0x2
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extern os_error *xosargs_read_ptr (os_f file,
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int *ptr);
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extern int osargs_read_ptr (os_f file);
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#define xosargs_read_ptr(file, ptr) \
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(os_error*) _swix(OS_Args, _IN(0)|_IN(1)|_OUT(2), \
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OSArgs_ReadPtr, \
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file, \
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ptr)
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#define osargs_read_ptr(file) \
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_swi(OS_Args, _IN(0)|_IN(1)|_RETURN(2), \
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OSArgs_ReadPtr, \
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file)
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extern os_error *xosargs_set_ptr (os_f file,
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int ptr);
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extern void osargs_set_ptr (os_f file,
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int ptr);
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#define xosargs_set_ptr(file, ptr) \
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(os_error*) _swix(OS_Args, _IN(0)|_IN(1)|_IN(2), \
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OSArgs_SetPtr, \
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file, \
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ptr)
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#define osargs_set_ptr(file, ptr) \
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(void) _swi(OS_Args, _IN(0)|_IN(1)|_IN(2), \
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OSArgs_SetPtr, \
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file, \
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ptr)
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extern os_error *xosargs_read_ext (os_f file,
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int *ext);
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extern int osargs_read_ext (os_f file);
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#define xosargs_read_ext(file, ext) \
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(os_error*) _swix(OS_Args, _IN(0)|_IN(1)|_OUT(2), \
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OSArgs_ReadExt, \
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file, \
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ext)
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#define osargs_read_ext(file) \
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_swi(OS_Args, _IN(0)|_IN(1)|_RETURN(2), \
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OSArgs_ReadExt, \
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file)
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/* OSLIB EMULATION ENDS */
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#endif
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#ifndef __osfcn_h
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/* Will be set or not during tiffcomp.h */
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/* You get this to compile under C++? Please say how! */
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extern int open(const char* name, int flags, int mode)
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{
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/* From what I can tell, should return <0 for failure */
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os_error* e = (os_error*) 1; /* Cheeky way to use a pointer eh? :-) */
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os_f file = (os_f) -1;
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flags = flags;
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switch(mode)
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{
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case O_RDONLY:
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{
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e = xosfind_openin(SKIP, name, SKIP, &file);
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break;
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}
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case O_WRONLY:
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case O_RDWR|O_CREAT:
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case O_RDWR|O_CREAT|O_TRUNC:
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{
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e = xosfind_openout(SKIP, name, SKIP, &file);
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break;
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}
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case O_RDWR:
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{
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e = xosfind_openup(SKIP, name, SKIP, &file);
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break;
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}
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}
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if (e)
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{
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file = (os_f) -1;
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}
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return (file);
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}
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extern int close(int fd)
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{
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return ((int) xosfind_close((os_f) fd));
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}
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extern int write(int fd, const char *buf, int nbytes)
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{
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/* Returns number of bytes written */
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return (nbytes - osgbpb_write((os_f) fd, (const byte*) buf, nbytes));
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}
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extern int read(int fd, char *buf, int nbytes)
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{
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/* Returns number of bytes read */
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return (nbytes - osgbpb_read((os_f) fd, (byte*) buf, nbytes));
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}
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extern off_t lseek(int fd, off_t offset, int whence)
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{
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int absolute = 0;
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switch (whence)
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{
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case SEEK_SET:
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{
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absolute = (int) offset;
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break;
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}
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case SEEK_CUR:
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{
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absolute = osargs_read_ptr((os_f) fd) + (int) offset;
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break;
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}
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case SEEK_END:
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{
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absolute = osargs_read_ext((os_f) fd) + (int) offset;
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break;
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}
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}
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osargs_set_ptr((os_f) fd, absolute);
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return ((off_t) osargs_read_ptr((os_f) fd));
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}
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#endif
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static tsize_t
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_tiffReadProc(thandle_t fd, tdata_t buf, tsize_t size)
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{
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return ((tsize_t) read((int) fd, buf, (size_t) size));
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}
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static tsize_t
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_tiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size)
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{
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return ((tsize_t) write((int) fd, buf, (size_t) size));
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}
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static toff_t
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_tiffSeekProc(thandle_t fd, toff_t off, int whence)
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{
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return ((toff_t) lseek((int) fd, (off_t) off, whence));
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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 (close((int) fd));
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}
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static toff_t
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_tiffSizeProc(thandle_t fd)
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{
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return (lseek((int) fd, SEEK_END, SEEK_SET));
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}
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#ifdef HAVE_MMAP
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#error "I didn't know Acorn had that!"
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#endif
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/* !HAVE_MMAP */
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static int
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_tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
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{
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(void) fd; (void) pbase; (void) psize;
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return (0);
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}
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static void
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_tiffUnmapProc(thandle_t fd, tdata_t base, toff_t size)
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{
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(void) fd; (void) base; (void) size;
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}
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/*
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* Open a TIFF file descriptor for read/writing.
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*/
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TIFF*
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TIFFFdOpen(int fd, const char* name, const char* mode)
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{
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TIFF* tif;
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tif = TIFFClientOpen(name, mode,
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(thandle_t) fd,
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_tiffReadProc, _tiffWriteProc,
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_tiffSeekProc, _tiffCloseProc, _tiffSizeProc,
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_tiffMapProc, _tiffUnmapProc);
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if (tif)
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{
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tif->tif_fd = fd;
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}
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return (tif);
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}
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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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int m, fd;
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m = _TIFFgetMode(mode, module);
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if (m == -1)
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{
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return ((TIFF*) 0);
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}
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fd = open(name, 0, m);
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if (fd < 0)
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{
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TIFFError(module, "%s: Cannot open", name);
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return ((TIFF *)0);
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}
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return (TIFFFdOpen(fd, name, mode));
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}
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void*
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_TIFFmalloc(tsize_t s)
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{
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return (malloc((size_t) s));
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}
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void
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_TIFFfree(tdata_t 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(tdata_t p, tsize_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(tdata_t p, int v, tsize_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(tdata_t d, const tdata_t s, tsize_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 tdata_t p1, const tdata_t p2, tsize_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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static void
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acornWarningHandler(const char* module, const char* fmt, va_list ap)
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{
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if (module != NULL)
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{
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fprintf(stderr, "%s: ", module);
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}
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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 = acornWarningHandler;
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static void
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acornErrorHandler(const char* module, const char* fmt, va_list ap)
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{
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if (module != NULL)
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{
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fprintf(stderr, "%s: ", module);
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}
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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 = acornErrorHandler;
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