| /* $Header: /cvsroot/freeimage/FreeImage/Source/LibTIFF/tif_acorn.c,v 1.27 2009/09/06 13:11:26 drolon 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; |