/* $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; |