tif_acorn.c
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上传日期:2014-07-20
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- /* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_acorn.c,v 1.2 2005/12/21 12:23:13 joris 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;