aboutsummaryrefslogtreecommitdiff
path: root/common/scummsys.h
blob: 291de87dc9270a144354f44c590daf507f62a90d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#ifndef COMMON_SCUMMSYS_H
#define COMMON_SCUMMSYS_H

// This is a convenience macro to test whether the compiler used is a GCC
// version, which is at least major.minor.
#define GCC_ATLEAST(major, minor) (defined(__GNUC__) && (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))))

#if defined(_WIN32_WCE) && _WIN32_WCE < 300
	#define NONSTANDARD_PORT
#endif

#if defined(NONSTANDARD_PORT)

	// Ports which need to perform #includes and #defines visible in
	// virtually all the source of ScummVM should do so by providing a
	// "portdefs.h" header file (and not by directly modifying this
	// header file).
	#include <portdefs.h>
#else // defined(NONSTANDARD_PORT)

	#if defined(WIN32)

		#ifdef _MSC_VER

		// FIXME: The placement of the workaround functions for MSVC below
		// require us to include stdio.h and stdarg.h for MSVC here. This
		// is not exactly nice...
		// We should think of a better way of doing this.
		#include <stdio.h>
		#include <stdarg.h>

		// MSVC's vsnprintf is either non-existent (2003) or bugged since it
		// does not always include a terminating NULL (2005+). To work around
		// that we fix up the _vsnprintf included. Note that the return value
		// will still not match C99's specs!
		inline int vsnprintf_msvc(char *str, size_t size, const char *format, va_list args) {
			// We do not pass size - 1 here, to ensure we would get the same
			// return value as when we would use _vsnprintf directly, since
			// for example Common::String::format relies on this.
			int retValue = _vsnprintf(str, size, format, args);
			str[size - 1] = 0;
			return retValue;
		}

		#define vsnprintf vsnprintf_msvc

		// Visual Studio does not include snprintf in its standard C library.
		// Instead it includes a function called _snprintf with somewhat
		// similar semantics. The minor difference is that the return value in
		// case the formatted string exceeds the buffer size is different.
		// A much more dangerous one is that _snprintf does not always include
		// a terminating null (Whoops!). Instead we map to our fixed vsnprintf.
		inline int snprintf(char *str, size_t size, const char *format, ...) {
			va_list args;
			va_start(args, format);
			int len = vsnprintf(str, size, format, args);
			va_end(args);
			return len;
		}
		#endif

		#if !defined(_WIN32_WCE)

		#define WIN32_LEAN_AND_MEAN		// Exclude rarely-used stuff from Windows headers
		#define NOGDICAPMASKS
		#define OEMRESOURCE
		#define NONLS
		#define NOICONS
		#define NOMCX
		#define NOPROFILER
		#define NOKANJI
		#define NOSERVICE
		#define NOMETAFILE
		#define NOCOMM
		#define NOCRYPT
		#define NOIME
		#define NOATOM
		#define NOCTLMGR
		#define NOCLIPBOARD
		#define NOMEMMGR
		#define NOSYSMETRICS
		#define NOMENUS
		#define NOOPENFILE
		#define NOWH
		#define NOSOUND
		#define NODRAWTEXT

		#endif

		#if defined(ARRAYSIZE)
		// VS2005beta2 introduces new stuff in winnt.h
		#undef ARRAYSIZE
		#endif

	#endif

	#if defined(__QNXNTO__)
	#include <strings.h>	/* For strcasecmp */
	#endif

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <stdarg.h>
	#include <assert.h>
	#include <ctype.h>
	// MSVC does not define M_PI, M_SQRT2 and other math defines by default.
	// _USE_MATH_DEFINES must be defined in order to have these defined, thus
	// we enable it here. For more information, check:
	// http://msdn.microsoft.com/en-us/library/4hwaceh6(v=VS.100).aspx
	#define _USE_MATH_DEFINES
	#include <math.h>

	// FIXME: We sadly can't assume standard C++ headers to be present on every
	// system we support, so we should get rid of this. The solution should be to
	// write a simple placement new on our own. It might be noteworthy we can't
	// easily do that for systems which do have a <new>, since it might clash with
	// the default definition otherwise!
	// Symbian does not have <new> but the new operator
	#if !defined(__SYMBIAN32__)
	#include <new>
	#endif
#endif

// Include our C++11 compatability header for pre-C++11 compilers.
#if __cplusplus < 201103L
#include "common/c++11-compat.h"
#endif

// Use config.h, generated by configure
#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif


// In the following we configure various targets, in particular those
// which can't use our "configure" tool and hence don't use config.h.
//
// Some #defines that occur here frequently:
// SCUMM_LITTLE_ENDIAN
//    - Define this on a little endian target
// SCUMM_BIG_ENDIAN
//    - Define this on a big endian target
// SCUMM_NEED_ALIGNMENT
//    - Define this if your system has problems reading e.g. an int32 from an odd address
// SMALL_SCREEN_DEVICE
//    - ...
// ...


//
// By default we try to use pragma push/pop to ensure various structs we use
// are "packed". If your compiler doesn't support this pragma, you are in for
// a problem. If you are lucky, there is a compiler switch, or another pragma,
// doing the same thing -- in that case, try to modify common/pack-begin.h and
// common/pack-end.h accordingly. Or maybe your port simply *always* packs
// everything, in which case you could #undefine SCUMMVM_USE_PRAGMA_PACK.
//
// If neither is possible, tough luck. Try to contact the team, maybe we can
// come up with a solution, though I wouldn't hold my breath on it :-/.
//
#define SCUMMVM_USE_PRAGMA_PACK

//
// Determine the host endianess and whether memory alignment is required.
//
#if !defined(HAVE_CONFIG_H)

	#if defined(__DC__) || \
		  defined(__DS__) || \
		  defined(__GP32__) || \
		  defined(IPHONE) || \
		  defined(__PLAYSTATION2__) || \
		  defined(__PSP__) || \
		  defined(__SYMBIAN32__)

		#define SCUMM_LITTLE_ENDIAN
		#define SCUMM_NEED_ALIGNMENT

	#elif defined(_WIN32_WCE) || defined(_MSC_VER) || defined(__MINGW32__)

		#define SCUMM_LITTLE_ENDIAN

	#elif defined(__amigaos4__) || defined(__N64__) || defined(__WII__)

		#define SCUMM_BIG_ENDIAN
		#define SCUMM_NEED_ALIGNMENT

	#elif defined(SDL_BACKEND)
		// On SDL based ports, we try to use SDL_BYTEORDER to determine the
		// endianess. We explicitly do this as the *last* thing we try, so that
		// platform specific settings have precedence.
		#include <SDL_endian.h>

		#if SDL_BYTEORDER == SDL_LIL_ENDIAN
		#define SCUMM_LITTLE_ENDIAN
		#elif SDL_BYTEORDER == SDL_BIG_ENDIAN
		#define SCUMM_BIG_ENDIAN
		#else
		#error Neither SDL_BIG_ENDIAN nor SDL_LIL_ENDIAN is set.
		#endif

	#else

		#error No system type defined, host endianess unknown.

	#endif
#endif


//
// Some more system specific settings.
// TODO/FIXME: All of these should be moved to backend specific files (such as portdefs.h)
//
#if defined(DINGUX)

	// Very BAD hack following, used to avoid triggering an assert in uClibc dingux library
	// "toupper" when pressing keyboard function keys.
	#undef toupper
	#define toupper(c) (((c & 0xFF) >= 97) && ((c & 0xFF) <= 122) ? ((c & 0xFF) - 32) : (c & 0xFF))

#elif defined(__PSP__)

	#include <malloc.h>
	#include "backends/platform/psp/memory.h"

	/* to make an efficient, inlined memcpy implementation */
	#define memcpy(dst, src, size)   psp_memcpy(dst, src, size)

#endif


//
// Fallbacks / default values for various special macros
//
#ifndef GCC_PRINTF
	#if defined(__GNUC__) || defined(__INTEL_COMPILER)
		#define GCC_PRINTF(x,y) __attribute__((__format__(__printf__, x, y)))
	#else
		#define GCC_PRINTF(x,y)
	#endif
#endif

#ifndef PACKED_STRUCT
	#if defined(__GNUC__) || defined(__INTEL_COMPILER)
		#define PACKED_STRUCT __attribute__((__packed__))
	#else
		#define PACKED_STRUCT
	#endif
#endif

#ifndef FORCEINLINE
	#if defined(_MSC_VER)
		#define FORCEINLINE __forceinline
	#elif GCC_ATLEAST(3, 1)
		#define FORCEINLINE inline __attribute__((__always_inline__))
	#else
		#define FORCEINLINE inline
	#endif
#endif

#ifndef PLUGIN_EXPORT
	#if defined(_MSC_VER) || defined(_WIN32_WCE) || defined(__MINGW32__)
		#define PLUGIN_EXPORT __declspec(dllexport)
	#else
		#define PLUGIN_EXPORT
	#endif
#endif

#ifndef NORETURN_PRE
	#if defined(_MSC_VER)
		#define NORETURN_PRE __declspec(noreturn)
	#else
		#define NORETURN_PRE
	#endif
#endif

#ifndef NORETURN_POST
	#if defined(__GNUC__) || defined(__INTEL_COMPILER)
		#define NORETURN_POST __attribute__((__noreturn__))
	#else
		#define NORETURN_POST
	#endif
#endif

#ifndef STRINGBUFLEN
  #if defined(__N64__) || defined(__DS__)
    #define STRINGBUFLEN 256
  #else
    #define STRINGBUFLEN 1024
  #endif
#endif

#ifndef MAXPATHLEN
#define MAXPATHLEN 256
#endif

#ifndef scumm_va_copy
	#if defined(va_copy)
		#define scumm_va_copy va_copy
	#elif defined(__va_copy)
		#define scumm_va_copy __va_copy
	#elif defined(_MSC_VER) || defined(__SYMBIAN32__)
		#define scumm_va_copy(dst, src)       ((dst) = (src))
	#else
		#error scumm_va_copy undefined for this port
	#endif
#endif



//
// Typedef our system types unless they have already been defined by config.h,
// or SCUMMVM_DONT_DEFINE_TYPES is set.
//
#if !defined(HAVE_CONFIG_H) && !defined(SCUMMVM_DONT_DEFINE_TYPES)
	typedef unsigned char byte;
	typedef unsigned char uint8;
	typedef signed char int8;
	typedef unsigned short uint16;
	typedef signed short int16;
	typedef unsigned int uint32;
	typedef signed int int32;
	typedef unsigned int uint;
#endif


//
// Overlay color type (FIXME: shouldn't be declared here)
//
typedef uint16 OverlayColor;

#include "common/forbidden.h"

#endif