[wxWidgets.git] / src / tiff / contrib / acorn / convert

RISC OS Conversion log
======================

mkversion.c
~~~~~~~~~~~
The RISC OS command-line does not allow the direct creation of the version.h
file in the proper manner. To remedy this in such a way that the version
header is made at compiletime, I wrote this small program. It is fully
portable, so should work quite happily for any other platform that might need
it.

msg3states.c
~~~~~~~~~~~~
Needed getopt.c from the port folder, then compiled and worked fine.


tiff.h
~~~~~~

====1====

The symbol _MIPS_SZLONG, if not defined, causes a compiler error. Fixed by
ensuring it does exist. This looks to me like this wouldn't be an
Acorn-specific problem. The new code fragment is as follows:

#ifndef _MIPS_SZLONG
#define _MIPS_SZLONG 32
#endif
#if defined(__alpha) || _MIPS_SZLONG == 64


tiffcomp.h
~~~~~~~~~~

====1====

#if !defined(__MWERKS__) && !defined(THINK_C)
#include <sys/types.h>
#endif

Acorn also doesn't have this header so:

#if !defined(__MWERKS__) && !defined(THINK_C) && !defined(__acorn)
#include <sys/types.h>
#endif

====2====

#ifdef VMS
#include <file.h>
#include <unixio.h>
#else
#include <fcntl.h>
#endif

This seems to indicate that fcntl.h is included on all systems except
VMS. Odd, because I've never heard of it before. Sure it's in the ANSI
definition? Anyway, following change:

#ifdef VMS
#include <file.h>
#include <unixio.h>
#else
#ifndef __acorn
#include <fcntl.h>
#endif
#endif

This will probably change when I find out what it wants from fcntl.h!

====3====

#if defined(__MWERKS__) || defined(THINK_C) || defined(applec)
#include <stdlib.h>
#define	BSDTYPES
#endif

Added RISC OS to above thus:

#if defined(__MWERKS__) || defined(THINK_C) || defined(applec) || defined(__acorn)
#include <stdlib.h>
#define	BSDTYPES
#endif

====4====

/*
 * The library uses the ANSI C/POSIX SEEK_*
 * definitions that should be defined in unistd.h
 * (except on VMS where they are in stdio.h and
 * there is no unistd.h).
 */
#ifndef SEEK_SET
#if !defined(VMS) && !defined (applec) && !defined(THINK_C) && !defined(__MWERKS__)
#include <unistd.h>
#endif

RISC OS is like VMS and Mac in this regard. So changed to:

/*
 * The library uses the ANSI C/POSIX SEEK_*
 * definitions that should be defined in unistd.h
 * (except on VMS or the Mac or RISC OS, where they are in stdio.h and
 * there is no unistd.h).
 */
#ifndef SEEK_SET
#if !defined(VMS) && !defined (applec) && !defined(THINK_C) && !defined(__MWERKS__) && !defined(__acorn)
#include <unistd.h>
#endif
#endif

====5====

NB: HAVE_IEEEFP is defined in tiffconf.h, not tiffcomp.h as mentioned
in libtiff.README. (Note written on original port from 3.4beta004)

Acorn C/C++ claims to accord with IEEE 754, so no change (yet) to
tiffconf.h.

====6====

Unsure about whether this compiler supports inline functions. Will
leave it on for the time being and see if it works! (Likely if
everything else does.)

... Seems to be OK ...

====7====

Added to the end:

/*
 * osfcn.h is part of C++Lib on Acorn C/C++, and as such can't be used
 * on C alone. For that reason, the relevant functions have been
 * implemented by myself in tif_acorn.c, and the elements from the header
 * included here.
 */

#ifdef __acorn
#ifdef __cplusplus
#include <osfcn.h>
#else
#include "kernel.h"
#define	O_RDONLY	0
#define	O_WRONLY	1
#define	O_RDWR		2
#define	O_APPEND	8
#define	O_CREAT		0x200
#define	O_TRUNC		0x400
typedef long off_t;
extern int open(const char *name, int flags, int mode);
extern int close(int fd);
extern int write(int fd, const char *buf, int nbytes);
extern int read(int fd, char *buf, int nbytes);
extern off_t lseek(int fd, off_t offset, int whence);
#endif
#endif


===============================================================================

tif_acorn.c
~~~~~~~~~~~

Created file tif_acorn.c, copied initially from tif_unix.c

Documented internally where necessary.

Note that I have implemented the low-level file-handling functions normally
found in osfcn.h in here, and put the header info at the bottom of
tiffcomp.h. This is further documented from a RISC OS perspective inside the
file.

===============================================================================
Commit	Line	Data
8414a40c VZ	1	RISC OS Conversion log
	2	======================
	3
	4	mkversion.c
	5	~~~~~~~~~~~
	6	The RISC OS command-line does not allow the direct creation of the version.h
	7	file in the proper manner. To remedy this in such a way that the version
	8	header is made at compiletime, I wrote this small program. It is fully
	9	portable, so should work quite happily for any other platform that might need
	10	it.
	11
	12	msg3states.c
	13	~~~~~~~~~~~~
	14	Needed getopt.c from the port folder, then compiled and worked fine.
	15
	16
	17	tiff.h
	18	~~~~~~
	19
	20	====1====
	21
	22	The symbol _MIPS_SZLONG, if not defined, causes a compiler error. Fixed by
	23	ensuring it does exist. This looks to me like this wouldn't be an
	24	Acorn-specific problem. The new code fragment is as follows:
	25
	26	#ifndef _MIPS_SZLONG
	27	#define _MIPS_SZLONG 32
	28	#endif
	29	#if defined(__alpha) \|\| _MIPS_SZLONG == 64
	30
	31
	32
	33	tiffcomp.h
	34	~~~~~~~~~~
	35
	36	====1====
	37
	38	#if !defined(__MWERKS__) && !defined(THINK_C)
	39	#include <sys/types.h>
	40	#endif
	41
	42	Acorn also doesn't have this header so:
	43
	44	#if !defined(__MWERKS__) && !defined(THINK_C) && !defined(__acorn)
	45	#include <sys/types.h>
	46	#endif
	47
	48	====2====
	49
	50	#ifdef VMS
	51	#include <file.h>
	52	#include <unixio.h>
	53	#else
	54	#include <fcntl.h>
	55	#endif
	56
	57	This seems to indicate that fcntl.h is included on all systems except
	58	VMS. Odd, because I've never heard of it before. Sure it's in the ANSI
	59	definition? Anyway, following change:
	60
	61	#ifdef VMS
	62	#include <file.h>
	63	#include <unixio.h>
	64	#else
65	#ifndef __acorn
66	#include <fcntl.h>
67	#endif
68	#endif
69
70	This will probably change when I find out what it wants from fcntl.h!
71
72	====3====
73
74	#if defined(__MWERKS__) \|\| defined(THINK_C) \|\| defined(applec)
75	#include <stdlib.h>
76	#define BSDTYPES
77	#endif
78
79	Added RISC OS to above thus:
80
81	#if defined(__MWERKS__) \|\| defined(THINK_C) \|\| defined(applec) \|\| defined(__acorn)
82	#include <stdlib.h>
83	#define BSDTYPES
84	#endif
85
86	====4====
87
88	/*
89	* The library uses the ANSI C/POSIX SEEK_*
90	* definitions that should be defined in unistd.h
91	* (except on VMS where they are in stdio.h and
92	* there is no unistd.h).
93	*/
94	#ifndef SEEK_SET
95	#if !defined(VMS) && !defined (applec) && !defined(THINK_C) && !defined(__MWERKS__)
96	#include <unistd.h>
97	#endif
98
99	RISC OS is like VMS and Mac in this regard. So changed to:
100
101	/*
102	* The library uses the ANSI C/POSIX SEEK_*
103	* definitions that should be defined in unistd.h
104	* (except on VMS or the Mac or RISC OS, where they are in stdio.h and
105	* there is no unistd.h).
106	*/
107	#ifndef SEEK_SET
108	#if !defined(VMS) && !defined (applec) && !defined(THINK_C) && !defined(__MWERKS__) && !defined(__acorn)
109	#include <unistd.h>
110	#endif
111	#endif
112
113	====5====
114
115	NB: HAVE_IEEEFP is defined in tiffconf.h, not tiffcomp.h as mentioned
116	in libtiff.README. (Note written on original port from 3.4beta004)
117
118	Acorn C/C++ claims to accord with IEEE 754, so no change (yet) to
119	tiffconf.h.
120
121	====6====
122
123	Unsure about whether this compiler supports inline functions. Will
124	leave it on for the time being and see if it works! (Likely if
125	everything else does.)
126
127	... Seems to be OK ...
128
129	====7====
130
131	Added to the end:
132
133	/*
134	* osfcn.h is part of C++Lib on Acorn C/C++, and as such can't be used
135	* on C alone. For that reason, the relevant functions have been
136	* implemented by myself in tif_acorn.c, and the elements from the header
137	* included here.
138	*/
139
140	#ifdef __acorn
141	#ifdef __cplusplus
142	#include <osfcn.h>
143	#else
144	#include "kernel.h"
145	#define O_RDONLY 0
146	#define O_WRONLY 1
147	#define O_RDWR 2
148	#define O_APPEND 8
149	#define O_CREAT 0x200
150	#define O_TRUNC 0x400
151	typedef long off_t;
152	extern int open(const char *name, int flags, int mode);
153	extern int close(int fd);
154	extern int write(int fd, const char *buf, int nbytes);
155	extern int read(int fd, char *buf, int nbytes);
156	extern off_t lseek(int fd, off_t offset, int whence);
157	#endif
158	#endif
159
160
161	===============================================================================
162
163	tif_acorn.c
164	~~~~~~~~~~~
165
166	Created file tif_acorn.c, copied initially from tif_unix.c
167
168	Documented internally where necessary.
169
170	Note that I have implemented the low-level file-handling functions normally
171	found in osfcn.h in here, and put the header info at the bottom of
172	tiffcomp.h. This is further documented from a RISC OS perspective inside the
173	file.
174
175	===============================================================================