1 #ifndef CURLINC_SYSTEM_H
2 #define CURLINC_SYSTEM_H
3 /***************************************************************************
4  *                                  _   _ ____  _
5  *  Project                     ___| | | |  _ \| |
6  *                             / __| | | | |_) | |
7  *                            | (__| |_| |  _ <| |___
8  *                             \___|\___/|_| \_\_____|
9  *
10  * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
11  *
12  * This software is licensed as described in the file COPYING, which
13  * you should have received as part of this distribution. The terms
14  * are also available at https://curl.haxx.se/docs/copyright.html.
15  *
16  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17  * copies of the Software, and permit persons to whom the Software is
18  * furnished to do so, under the terms of the COPYING file.
19  *
20  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21  * KIND, either express or implied.
22  *
23  ***************************************************************************/
24 
25 /*
26  * Try to keep one section per platform, compiler and architecture, otherwise,
27  * if an existing section is reused for a different one and later on the
28  * original is adjusted, probably the piggybacking one can be adversely
29  * changed.
30  *
31  * In order to differentiate between platforms/compilers/architectures use
32  * only compiler built in predefined preprocessor symbols.
33  *
34  * curl_off_t
35  * ----------
36  *
37  * For any given platform/compiler curl_off_t must be typedef'ed to a 64-bit
38  * wide signed integral data type. The width of this data type must remain
39  * constant and independent of any possible large file support settings.
40  *
41  * As an exception to the above, curl_off_t shall be typedef'ed to a 32-bit
42  * wide signed integral data type if there is no 64-bit type.
43  *
44  * As a general rule, curl_off_t shall not be mapped to off_t. This rule shall
45  * only be violated if off_t is the only 64-bit data type available and the
46  * size of off_t is independent of large file support settings. Keep your
47  * build on the safe side avoiding an off_t gating.  If you have a 64-bit
48  * off_t then take for sure that another 64-bit data type exists, dig deeper
49  * and you will find it.
50  *
51  */
52 
53 #if defined(__DJGPP__) || defined(__GO32__)
54 #  if defined(__DJGPP__) && (__DJGPP__ > 1)
55 #    define CURL_TYPEOF_CURL_OFF_T     long long
56 #    define CURL_FORMAT_CURL_OFF_T     "lld"
57 #    define CURL_FORMAT_CURL_OFF_TU    "llu"
58 #    define CURL_SUFFIX_CURL_OFF_T     LL
59 #    define CURL_SUFFIX_CURL_OFF_TU    ULL
60 #  else
61 #    define CURL_TYPEOF_CURL_OFF_T     long
62 #    define CURL_FORMAT_CURL_OFF_T     "ld"
63 #    define CURL_FORMAT_CURL_OFF_TU    "lu"
64 #    define CURL_SUFFIX_CURL_OFF_T     L
65 #    define CURL_SUFFIX_CURL_OFF_TU    UL
66 #  endif
67 #  define CURL_TYPEOF_CURL_SOCKLEN_T int
68 
69 #elif defined(__SALFORDC__)
70 #  define CURL_TYPEOF_CURL_OFF_T     long
71 #  define CURL_FORMAT_CURL_OFF_T     "ld"
72 #  define CURL_FORMAT_CURL_OFF_TU    "lu"
73 #  define CURL_SUFFIX_CURL_OFF_T     L
74 #  define CURL_SUFFIX_CURL_OFF_TU    UL
75 #  define CURL_TYPEOF_CURL_SOCKLEN_T int
76 
77 #elif defined(__BORLANDC__)
78 #  if (__BORLANDC__ < 0x520)
79 #    define CURL_TYPEOF_CURL_OFF_T     long
80 #    define CURL_FORMAT_CURL_OFF_T     "ld"
81 #    define CURL_FORMAT_CURL_OFF_TU    "lu"
82 #    define CURL_SUFFIX_CURL_OFF_T     L
83 #    define CURL_SUFFIX_CURL_OFF_TU    UL
84 #  else
85 #    define CURL_TYPEOF_CURL_OFF_T     __int64
86 #    define CURL_FORMAT_CURL_OFF_T     "I64d"
87 #    define CURL_FORMAT_CURL_OFF_TU    "I64u"
88 #    define CURL_SUFFIX_CURL_OFF_T     i64
89 #    define CURL_SUFFIX_CURL_OFF_TU    ui64
90 #  endif
91 #  define CURL_TYPEOF_CURL_SOCKLEN_T int
92 
93 #elif defined(__TURBOC__)
94 #  define CURL_TYPEOF_CURL_OFF_T     long
95 #  define CURL_FORMAT_CURL_OFF_T     "ld"
96 #  define CURL_FORMAT_CURL_OFF_TU    "lu"
97 #  define CURL_SUFFIX_CURL_OFF_T     L
98 #  define CURL_SUFFIX_CURL_OFF_TU    UL
99 #  define CURL_TYPEOF_CURL_SOCKLEN_T int
100 
101 #elif defined(__WATCOMC__)
102 #  if defined(__386__)
103 #    define CURL_TYPEOF_CURL_OFF_T     __int64
104 #    define CURL_FORMAT_CURL_OFF_T     "I64d"
105 #    define CURL_FORMAT_CURL_OFF_TU    "I64u"
106 #    define CURL_SUFFIX_CURL_OFF_T     i64
107 #    define CURL_SUFFIX_CURL_OFF_TU    ui64
108 #  else
109 #    define CURL_TYPEOF_CURL_OFF_T     long
110 #    define CURL_FORMAT_CURL_OFF_T     "ld"
111 #    define CURL_FORMAT_CURL_OFF_TU    "lu"
112 #    define CURL_SUFFIX_CURL_OFF_T     L
113 #    define CURL_SUFFIX_CURL_OFF_TU    UL
114 #  endif
115 #  define CURL_TYPEOF_CURL_SOCKLEN_T int
116 
117 #elif defined(__POCC__)
118 #  if (__POCC__ < 280)
119 #    define CURL_TYPEOF_CURL_OFF_T     long
120 #    define CURL_FORMAT_CURL_OFF_T     "ld"
121 #    define CURL_FORMAT_CURL_OFF_TU    "lu"
122 #    define CURL_SUFFIX_CURL_OFF_T     L
123 #    define CURL_SUFFIX_CURL_OFF_TU    UL
124 #  elif defined(_MSC_VER)
125 #    define CURL_TYPEOF_CURL_OFF_T     __int64
126 #    define CURL_FORMAT_CURL_OFF_T     "I64d"
127 #    define CURL_FORMAT_CURL_OFF_TU    "I64u"
128 #    define CURL_SUFFIX_CURL_OFF_T     i64
129 #    define CURL_SUFFIX_CURL_OFF_TU    ui64
130 #  else
131 #    define CURL_TYPEOF_CURL_OFF_T     long long
132 #    define CURL_FORMAT_CURL_OFF_T     "lld"
133 #    define CURL_FORMAT_CURL_OFF_TU    "llu"
134 #    define CURL_SUFFIX_CURL_OFF_T     LL
135 #    define CURL_SUFFIX_CURL_OFF_TU    ULL
136 #  endif
137 #  define CURL_TYPEOF_CURL_SOCKLEN_T int
138 
139 #elif defined(__LCC__)
140 #  define CURL_TYPEOF_CURL_OFF_T     long
141 #  define CURL_FORMAT_CURL_OFF_T     "ld"
142 #  define CURL_FORMAT_CURL_OFF_TU    "lu"
143 #  define CURL_SUFFIX_CURL_OFF_T     L
144 #  define CURL_SUFFIX_CURL_OFF_TU    UL
145 #  define CURL_TYPEOF_CURL_SOCKLEN_T int
146 
147 #elif defined(__SYMBIAN32__)
148 #  if defined(__EABI__)  /* Treat all ARM compilers equally */
149 #    define CURL_TYPEOF_CURL_OFF_T     long long
150 #    define CURL_FORMAT_CURL_OFF_T     "lld"
151 #    define CURL_FORMAT_CURL_OFF_TU    "llu"
152 #    define CURL_SUFFIX_CURL_OFF_T     LL
153 #    define CURL_SUFFIX_CURL_OFF_TU    ULL
154 #  elif defined(__CW32__)
155 #    pragma longlong on
156 #    define CURL_TYPEOF_CURL_OFF_T     long long
157 #    define CURL_FORMAT_CURL_OFF_T     "lld"
158 #    define CURL_FORMAT_CURL_OFF_TU    "llu"
159 #    define CURL_SUFFIX_CURL_OFF_T     LL
160 #    define CURL_SUFFIX_CURL_OFF_TU    ULL
161 #  elif defined(__VC32__)
162 #    define CURL_TYPEOF_CURL_OFF_T     __int64
163 #    define CURL_FORMAT_CURL_OFF_T     "lld"
164 #    define CURL_FORMAT_CURL_OFF_TU    "llu"
165 #    define CURL_SUFFIX_CURL_OFF_T     LL
166 #    define CURL_SUFFIX_CURL_OFF_TU    ULL
167 #  endif
168 #  define CURL_TYPEOF_CURL_SOCKLEN_T unsigned int
169 
170 #elif defined(__MWERKS__)
171 #  define CURL_TYPEOF_CURL_OFF_T     long long
172 #  define CURL_FORMAT_CURL_OFF_T     "lld"
173 #  define CURL_FORMAT_CURL_OFF_TU    "llu"
174 #  define CURL_SUFFIX_CURL_OFF_T     LL
175 #  define CURL_SUFFIX_CURL_OFF_TU    ULL
176 #  define CURL_TYPEOF_CURL_SOCKLEN_T int
177 
178 #elif defined(_WIN32_WCE)
179 #  define CURL_TYPEOF_CURL_OFF_T     __int64
180 #  define CURL_FORMAT_CURL_OFF_T     "I64d"
181 #  define CURL_FORMAT_CURL_OFF_TU    "I64u"
182 #  define CURL_SUFFIX_CURL_OFF_T     i64
183 #  define CURL_SUFFIX_CURL_OFF_TU    ui64
184 #  define CURL_TYPEOF_CURL_SOCKLEN_T int
185 
186 #elif defined(__MINGW32__)
187 #  define CURL_TYPEOF_CURL_OFF_T     long long
188 #  define CURL_FORMAT_CURL_OFF_T     "I64d"
189 #  define CURL_FORMAT_CURL_OFF_TU    "I64u"
190 #  define CURL_SUFFIX_CURL_OFF_T     LL
191 #  define CURL_SUFFIX_CURL_OFF_TU    ULL
192 #  define CURL_TYPEOF_CURL_SOCKLEN_T socklen_t
193 #  define CURL_PULL_SYS_TYPES_H      1
194 #  define CURL_PULL_WS2TCPIP_H       1
195 
196 #elif defined(__VMS)
197 #  if defined(__VAX)
198 #    define CURL_TYPEOF_CURL_OFF_T     long
199 #    define CURL_FORMAT_CURL_OFF_T     "ld"
200 #    define CURL_FORMAT_CURL_OFF_TU    "lu"
201 #    define CURL_SUFFIX_CURL_OFF_T     L
202 #    define CURL_SUFFIX_CURL_OFF_TU    UL
203 #  else
204 #    define CURL_TYPEOF_CURL_OFF_T     long long
205 #    define CURL_FORMAT_CURL_OFF_T     "lld"
206 #    define CURL_FORMAT_CURL_OFF_TU    "llu"
207 #    define CURL_SUFFIX_CURL_OFF_T     LL
208 #    define CURL_SUFFIX_CURL_OFF_TU    ULL
209 #  endif
210 #  define CURL_TYPEOF_CURL_SOCKLEN_T unsigned int
211 
212 #elif defined(__OS400__)
213 #  if defined(__ILEC400__)
214 #    define CURL_TYPEOF_CURL_OFF_T     long long
215 #    define CURL_FORMAT_CURL_OFF_T     "lld"
216 #    define CURL_FORMAT_CURL_OFF_TU    "llu"
217 #    define CURL_SUFFIX_CURL_OFF_T     LL
218 #    define CURL_SUFFIX_CURL_OFF_TU    ULL
219 #    define CURL_TYPEOF_CURL_SOCKLEN_T socklen_t
220 #    define CURL_PULL_SYS_TYPES_H      1
221 #    define CURL_PULL_SYS_SOCKET_H     1
222 #  endif
223 
224 #elif defined(__MVS__)
225 #  if defined(__IBMC__) || defined(__IBMCPP__)
226 #    if defined(_ILP32)
227 #    elif defined(_LP64)
228 #    endif
229 #    if defined(_LONG_LONG)
230 #      define CURL_TYPEOF_CURL_OFF_T     long long
231 #      define CURL_FORMAT_CURL_OFF_T     "lld"
232 #      define CURL_FORMAT_CURL_OFF_TU    "llu"
233 #      define CURL_SUFFIX_CURL_OFF_T     LL
234 #      define CURL_SUFFIX_CURL_OFF_TU    ULL
235 #    elif defined(_LP64)
236 #      define CURL_TYPEOF_CURL_OFF_T     long
237 #      define CURL_FORMAT_CURL_OFF_T     "ld"
238 #      define CURL_FORMAT_CURL_OFF_TU    "lu"
239 #      define CURL_SUFFIX_CURL_OFF_T     L
240 #      define CURL_SUFFIX_CURL_OFF_TU    UL
241 #    else
242 #      define CURL_TYPEOF_CURL_OFF_T     long
243 #      define CURL_FORMAT_CURL_OFF_T     "ld"
244 #      define CURL_FORMAT_CURL_OFF_TU    "lu"
245 #      define CURL_SUFFIX_CURL_OFF_T     L
246 #      define CURL_SUFFIX_CURL_OFF_TU    UL
247 #    endif
248 #    define CURL_TYPEOF_CURL_SOCKLEN_T socklen_t
249 #    define CURL_PULL_SYS_TYPES_H      1
250 #    define CURL_PULL_SYS_SOCKET_H     1
251 #  endif
252 
253 #elif defined(__370__)
254 #  if defined(__IBMC__) || defined(__IBMCPP__)
255 #    if defined(_ILP32)
256 #    elif defined(_LP64)
257 #    endif
258 #    if defined(_LONG_LONG)
259 #      define CURL_TYPEOF_CURL_OFF_T     long long
260 #      define CURL_FORMAT_CURL_OFF_T     "lld"
261 #      define CURL_FORMAT_CURL_OFF_TU    "llu"
262 #      define CURL_SUFFIX_CURL_OFF_T     LL
263 #      define CURL_SUFFIX_CURL_OFF_TU    ULL
264 #    elif defined(_LP64)
265 #      define CURL_TYPEOF_CURL_OFF_T     long
266 #      define CURL_FORMAT_CURL_OFF_T     "ld"
267 #      define CURL_FORMAT_CURL_OFF_TU    "lu"
268 #      define CURL_SUFFIX_CURL_OFF_T     L
269 #      define CURL_SUFFIX_CURL_OFF_TU    UL
270 #    else
271 #      define CURL_TYPEOF_CURL_OFF_T     long
272 #      define CURL_FORMAT_CURL_OFF_T     "ld"
273 #      define CURL_FORMAT_CURL_OFF_TU    "lu"
274 #      define CURL_SUFFIX_CURL_OFF_T     L
275 #      define CURL_SUFFIX_CURL_OFF_TU    UL
276 #    endif
277 #    define CURL_TYPEOF_CURL_SOCKLEN_T socklen_t
278 #    define CURL_PULL_SYS_TYPES_H      1
279 #    define CURL_PULL_SYS_SOCKET_H     1
280 #  endif
281 
282 #elif defined(TPF)
283 #  define CURL_TYPEOF_CURL_OFF_T     long
284 #  define CURL_FORMAT_CURL_OFF_T     "ld"
285 #  define CURL_FORMAT_CURL_OFF_TU    "lu"
286 #  define CURL_SUFFIX_CURL_OFF_T     L
287 #  define CURL_SUFFIX_CURL_OFF_TU    UL
288 #  define CURL_TYPEOF_CURL_SOCKLEN_T int
289 
290 #elif defined(__TINYC__) /* also known as tcc */
291 
292 #  define CURL_TYPEOF_CURL_OFF_T     long long
293 #  define CURL_FORMAT_CURL_OFF_T     "lld"
294 #  define CURL_FORMAT_CURL_OFF_TU    "llu"
295 #  define CURL_SUFFIX_CURL_OFF_T     LL
296 #  define CURL_SUFFIX_CURL_OFF_TU    ULL
297 #  define CURL_TYPEOF_CURL_SOCKLEN_T socklen_t
298 #  define CURL_PULL_SYS_TYPES_H      1
299 #  define CURL_PULL_SYS_SOCKET_H     1
300 
301 #elif defined(__SUNPRO_C) || defined(__SUNPRO_CC) /* Oracle Solaris Studio */
302 #  if !defined(__LP64) && (defined(__ILP32) ||                          \
303                            defined(__i386) ||                           \
304                            defined(__sparcv8) ||                        \
305                            defined(__sparcv8plus))
306 #    define CURL_TYPEOF_CURL_OFF_T     long long
307 #    define CURL_FORMAT_CURL_OFF_T     "lld"
308 #    define CURL_FORMAT_CURL_OFF_TU    "llu"
309 #    define CURL_SUFFIX_CURL_OFF_T     LL
310 #    define CURL_SUFFIX_CURL_OFF_TU    ULL
311 #  elif defined(__LP64) || \
312         defined(__amd64) || defined(__sparcv9)
313 #    define CURL_TYPEOF_CURL_OFF_T     long
314 #    define CURL_FORMAT_CURL_OFF_T     "ld"
315 #    define CURL_FORMAT_CURL_OFF_TU    "lu"
316 #    define CURL_SUFFIX_CURL_OFF_T     L
317 #    define CURL_SUFFIX_CURL_OFF_TU    UL
318 #  endif
319 #  define CURL_TYPEOF_CURL_SOCKLEN_T socklen_t
320 #  define CURL_PULL_SYS_TYPES_H      1
321 #  define CURL_PULL_SYS_SOCKET_H     1
322 
323 #elif defined(__xlc__) /* IBM xlc compiler */
324 #  if !defined(_LP64)
325 #    define CURL_TYPEOF_CURL_OFF_T     long long
326 #    define CURL_FORMAT_CURL_OFF_T     "lld"
327 #    define CURL_FORMAT_CURL_OFF_TU    "llu"
328 #    define CURL_SUFFIX_CURL_OFF_T     LL
329 #    define CURL_SUFFIX_CURL_OFF_TU    ULL
330 #  else
331 #    define CURL_TYPEOF_CURL_OFF_T     long
332 #    define CURL_FORMAT_CURL_OFF_T     "ld"
333 #    define CURL_FORMAT_CURL_OFF_TU    "lu"
334 #    define CURL_SUFFIX_CURL_OFF_T     L
335 #    define CURL_SUFFIX_CURL_OFF_TU    UL
336 #  endif
337 #  define CURL_TYPEOF_CURL_SOCKLEN_T socklen_t
338 #  define CURL_PULL_SYS_TYPES_H      1
339 #  define CURL_PULL_SYS_SOCKET_H     1
340 
341 /* ===================================== */
342 /*    KEEP MSVC THE PENULTIMATE ENTRY    */
343 /* ===================================== */
344 
345 #elif defined(_MSC_VER)
346 #  if (_MSC_VER >= 900) && (_INTEGRAL_MAX_BITS >= 64)
347 #    define CURL_TYPEOF_CURL_OFF_T     __int64
348 #    define CURL_FORMAT_CURL_OFF_T     "I64d"
349 #    define CURL_FORMAT_CURL_OFF_TU    "I64u"
350 #    define CURL_SUFFIX_CURL_OFF_T     i64
351 #    define CURL_SUFFIX_CURL_OFF_TU    ui64
352 #  else
353 #    define CURL_TYPEOF_CURL_OFF_T     long
354 #    define CURL_FORMAT_CURL_OFF_T     "ld"
355 #    define CURL_FORMAT_CURL_OFF_TU    "lu"
356 #    define CURL_SUFFIX_CURL_OFF_T     L
357 #    define CURL_SUFFIX_CURL_OFF_TU    UL
358 #  endif
359 #  define CURL_TYPEOF_CURL_SOCKLEN_T int
360 
361 /* ===================================== */
362 /*    KEEP GENERIC GCC THE LAST ENTRY    */
363 /* ===================================== */
364 
365 #elif defined(__GNUC__) && !defined(_SCO_DS)
366 #  if !defined(__LP64__) &&                                             \
367   (defined(__ILP32__) || defined(__i386__) || defined(__hppa__) ||      \
368    defined(__ppc__) || defined(__powerpc__) || defined(__arm__) ||      \
369    defined(__sparc__) || defined(__mips__) || defined(__sh__) ||        \
370    defined(__XTENSA__) ||                                               \
371    (defined(__SIZEOF_LONG__) && __SIZEOF_LONG__ == 4)  ||               \
372    (defined(__LONG_MAX__) && __LONG_MAX__ == 2147483647L))
373 #    define CURL_TYPEOF_CURL_OFF_T     long long
374 #    define CURL_FORMAT_CURL_OFF_T     "lld"
375 #    define CURL_FORMAT_CURL_OFF_TU    "llu"
376 #    define CURL_SUFFIX_CURL_OFF_T     LL
377 #    define CURL_SUFFIX_CURL_OFF_TU    ULL
378 #  elif defined(__LP64__) || \
379         defined(__x86_64__) || defined(__ppc64__) || defined(__sparc64__) || \
380         (defined(__SIZEOF_LONG__) && __SIZEOF_LONG__ == 8) || \
381         (defined(__LONG_MAX__) && __LONG_MAX__ == 9223372036854775807L)
382 #    define CURL_TYPEOF_CURL_OFF_T     long
383 #    define CURL_FORMAT_CURL_OFF_T     "ld"
384 #    define CURL_FORMAT_CURL_OFF_TU    "lu"
385 #    define CURL_SUFFIX_CURL_OFF_T     L
386 #    define CURL_SUFFIX_CURL_OFF_TU    UL
387 #  endif
388 #  define CURL_TYPEOF_CURL_SOCKLEN_T socklen_t
389 #  define CURL_PULL_SYS_TYPES_H      1
390 #  define CURL_PULL_SYS_SOCKET_H     1
391 
392 #else
393 /* generic "safe guess" on old 32 bit style */
394 # define CURL_TYPEOF_CURL_OFF_T     long
395 # define CURL_FORMAT_CURL_OFF_T     "ld"
396 # define CURL_FORMAT_CURL_OFF_TU    "lu"
397 # define CURL_SUFFIX_CURL_OFF_T     L
398 # define CURL_SUFFIX_CURL_OFF_TU    UL
399 # define CURL_TYPEOF_CURL_SOCKLEN_T int
400 #endif
401 
402 #ifdef _AIX
403 /* AIX needs <sys/poll.h> */
404 #define CURL_PULL_SYS_POLL_H
405 #endif
406 
407 
408 /* CURL_PULL_WS2TCPIP_H is defined above when inclusion of header file  */
409 /* ws2tcpip.h is required here to properly make type definitions below. */
410 #ifdef CURL_PULL_WS2TCPIP_H
411 #  include <winsock2.h>
412 #  include <windows.h>
413 #  include <ws2tcpip.h>
414 #endif
415 
416 /* CURL_PULL_SYS_TYPES_H is defined above when inclusion of header file  */
417 /* sys/types.h is required here to properly make type definitions below. */
418 #ifdef CURL_PULL_SYS_TYPES_H
419 #  include <sys/types.h>
420 #endif
421 
422 /* CURL_PULL_SYS_SOCKET_H is defined above when inclusion of header file  */
423 /* sys/socket.h is required here to properly make type definitions below. */
424 #ifdef CURL_PULL_SYS_SOCKET_H
425 #  include <sys/socket.h>
426 #endif
427 
428 /* CURL_PULL_SYS_POLL_H is defined above when inclusion of header file    */
429 /* sys/poll.h is required here to properly make type definitions below.   */
430 #ifdef CURL_PULL_SYS_POLL_H
431 #  include <sys/poll.h>
432 #endif
433 
434 /* Data type definition of curl_socklen_t. */
435 #ifdef CURL_TYPEOF_CURL_SOCKLEN_T
436   typedef CURL_TYPEOF_CURL_SOCKLEN_T curl_socklen_t;
437 #endif
438 
439 /* Data type definition of curl_off_t. */
440 
441 #ifdef CURL_TYPEOF_CURL_OFF_T
442   typedef CURL_TYPEOF_CURL_OFF_T curl_off_t;
443 #endif
444 
445 /*
446  * CURL_ISOCPP and CURL_OFF_T_C definitions are done here in order to allow
447  * these to be visible and exported by the external libcurl interface API,
448  * while also making them visible to the library internals, simply including
449  * curl_setup.h, without actually needing to include curl.h internally.
450  * If some day this section would grow big enough, all this should be moved
451  * to its own header file.
452  */
453 
454 /*
455  * Figure out if we can use the ## preprocessor operator, which is supported
456  * by ISO/ANSI C and C++. Some compilers support it without setting __STDC__
457  * or  __cplusplus so we need to carefully check for them too.
458  */
459 
460 #if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus) || \
461   defined(__HP_aCC) || defined(__BORLANDC__) || defined(__LCC__) || \
462   defined(__POCC__) || defined(__SALFORDC__) || defined(__HIGHC__) || \
463   defined(__ILEC400__)
464   /* This compiler is believed to have an ISO compatible preprocessor */
465 #define CURL_ISOCPP
466 #else
467   /* This compiler is believed NOT to have an ISO compatible preprocessor */
468 #undef CURL_ISOCPP
469 #endif
470 
471 /*
472  * Macros for minimum-width signed and unsigned curl_off_t integer constants.
473  */
474 
475 #if defined(__BORLANDC__) && (__BORLANDC__ == 0x0551)
476 #  define CURLINC_OFF_T_C_HLPR2(x) x
477 #  define CURLINC_OFF_T_C_HLPR1(x) CURLINC_OFF_T_C_HLPR2(x)
478 #  define CURL_OFF_T_C(Val)  CURLINC_OFF_T_C_HLPR1(Val) ## \
479                              CURLINC_OFF_T_C_HLPR1(CURL_SUFFIX_CURL_OFF_T)
480 #  define CURL_OFF_TU_C(Val) CURLINC_OFF_T_C_HLPR1(Val) ## \
481                              CURLINC_OFF_T_C_HLPR1(CURL_SUFFIX_CURL_OFF_TU)
482 #else
483 #  ifdef CURL_ISOCPP
484 #    define CURLINC_OFF_T_C_HLPR2(Val,Suffix) Val ## Suffix
485 #  else
486 #    define CURLINC_OFF_T_C_HLPR2(Val,Suffix) Val/**/Suffix
487 #  endif
488 #  define CURLINC_OFF_T_C_HLPR1(Val,Suffix) CURLINC_OFF_T_C_HLPR2(Val,Suffix)
489 #  define CURL_OFF_T_C(Val)  CURLINC_OFF_T_C_HLPR1(Val,CURL_SUFFIX_CURL_OFF_T)
490 #  define CURL_OFF_TU_C(Val) CURLINC_OFF_T_C_HLPR1(Val,CURL_SUFFIX_CURL_OFF_TU)
491 #endif
492 
493 #endif /* CURLINC_SYSTEM_H */
494