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1#ifndef __CURL_TYPECHECK_GCC_H
2#define __CURL_TYPECHECK_GCC_H
3/***************************************************************************
4 * _ _ ____ _
5 * Project ___| | | | _ \| |
6 * / __| | | | |_) | |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
9 *
10 * Copyright (C) 1998 - 2008, 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 http://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 * $Id: typecheck-gcc.h,v 1.1 2008-12-12 16:46:08 ovyn Exp $
24 ***************************************************************************/
25
26/* wraps curl_easy_setopt() with typechecking */
27
28/* To add a new kind of warning, add an
29 * if(_curl_is_sometype_option(_curl_opt) && ! _curl_is_sometype(value))
30 * _curl_easy_setopt_err_sometype();
31 * block and define _curl_is_sometype_option, _curl_is_sometype and
32 * _curl_easy_setopt_err_sometype below
33 *
34 * To add an option that uses the same type as an existing option, you'll just
35 * need to extend the appropriate _curl_*_option macro
36 */
37#define curl_easy_setopt(handle, option, value) \
38__extension__ ({ \
39 __typeof__ (option) _curl_opt = option; \
40 if (__builtin_constant_p(_curl_opt)) { \
41 if (_curl_is_long_option(_curl_opt) && !_curl_is_long(value)) \
42 _curl_easy_setopt_err_long(); \
43 if (_curl_is_off_t_option(_curl_opt) && !_curl_is_off_t(value)) \
44 _curl_easy_setopt_err_curl_off_t(); \
45 if (_curl_is_string_option(_curl_opt) && !_curl_is_string(value)) \
46 _curl_easy_setopt_err_string(); \
47 if (_curl_is_write_cb_option(_curl_opt) && !_curl_is_write_cb(value)) \
48 _curl_easy_setopt_err_write_callback(); \
49 if ((_curl_opt) == CURLOPT_READFUNCTION && !_curl_is_read_cb(value)) \
50 _curl_easy_setopt_err_read_cb(); \
51 if ((_curl_opt) == CURLOPT_IOCTLFUNCTION && !_curl_is_ioctl_cb(value)) \
52 _curl_easy_setopt_err_ioctl_cb(); \
53 if ((_curl_opt) == CURLOPT_SOCKOPTFUNCTION && !_curl_is_sockopt_cb(value))\
54 _curl_easy_setopt_err_sockopt_cb(); \
55 if ((_curl_opt) == CURLOPT_OPENSOCKETFUNCTION && \
56 !_curl_is_opensocket_cb(value)) \
57 _curl_easy_setopt_err_opensocket_cb(); \
58 if ((_curl_opt) == CURLOPT_PROGRESSFUNCTION && \
59 !_curl_is_progress_cb(value)) \
60 _curl_easy_setopt_err_progress_cb(); \
61 if ((_curl_opt) == CURLOPT_DEBUGFUNCTION && !_curl_is_debug_cb(value)) \
62 _curl_easy_setopt_err_debug_cb(); \
63 if ((_curl_opt) == CURLOPT_SSL_CTX_FUNCTION && \
64 !_curl_is_ssl_ctx_cb(value)) \
65 _curl_easy_setopt_err_ssl_ctx_cb(); \
66 if (_curl_is_conv_cb_option(_curl_opt) && !_curl_is_conv_cb(value)) \
67 _curl_easy_setopt_err_conv_cb(); \
68 if ((_curl_opt) == CURLOPT_SEEKFUNCTION && !_curl_is_seek_cb(value)) \
69 _curl_easy_setopt_err_seek_cb(); \
70 if (_curl_is_cb_data_option(_curl_opt) && !_curl_is_cb_data(value)) \
71 _curl_easy_setopt_err_cb_data(); \
72 if ((_curl_opt) == CURLOPT_ERRORBUFFER && !_curl_is_error_buffer(value)) \
73 _curl_easy_setopt_err_error_buffer(); \
74 if ((_curl_opt) == CURLOPT_STDERR && !_curl_is_FILE(value)) \
75 _curl_easy_setopt_err_FILE(); \
76 if (_curl_is_postfields_option(_curl_opt) && !_curl_is_postfields(value)) \
77 _curl_easy_setopt_err_postfields(); \
78 if ((_curl_opt) == CURLOPT_HTTPPOST && \
79 !_curl_is_arr((value), struct curl_httppost)) \
80 _curl_easy_setopt_err_curl_httpost(); \
81 if (_curl_is_slist_option(_curl_opt) && \
82 !_curl_is_arr((value), struct curl_slist)) \
83 _curl_easy_setopt_err_curl_slist(); \
84 if ((_curl_opt) == CURLOPT_SHARE && !_curl_is_ptr((value), CURLSH)) \
85 _curl_easy_setopt_err_CURLSH(); \
86 } \
87 curl_easy_setopt(handle, _curl_opt, value); \
88})
89
90/* wraps curl_easy_getinfo() with typechecking */
91/* FIXME: don't allow const pointers */
92#define curl_easy_getinfo(handle, info, arg) \
93__extension__ ({ \
94 __typeof__ (info) _curl_info = info; \
95 if (__builtin_constant_p(_curl_info)) { \
96 if (_curl_is_string_info(_curl_info) && !_curl_is_arr((arg), char *)) \
97 _curl_easy_getinfo_err_string(); \
98 if (_curl_is_long_info(_curl_info) && !_curl_is_arr((arg), long)) \
99 _curl_easy_getinfo_err_long(); \
100 if (_curl_is_double_info(_curl_info) && !_curl_is_arr((arg), double)) \
101 _curl_easy_getinfo_err_double(); \
102 if (_curl_is_slist_info(_curl_info) && \
103 !_curl_is_arr((arg), struct curl_slist *)) \
104 _curl_easy_getinfo_err_curl_slist(); \
105 } \
106 curl_easy_getinfo(handle, _curl_info, arg); \
107})
108
109/* TODO: typechecking for curl_share_setopt() and curl_multi_setopt(),
110 * for now just make sure that the functions are called with three
111 * arguments
112 */
113#define curl_share_setopt(share,opt,param) curl_share_setopt(share,opt,param)
114#define curl_multi_setopt(handle,opt,param) curl_multi_setopt(handle,opt,param)
115
116
117/* the actual warnings, triggered by calling the _curl_easy_setopt_err*
118 * functions */
119
120/* To define a new warning, use _CURL_WARNING(identifier, "message") */
121#define _CURL_WARNING(id, message) \
122 static void __attribute__((warning(message))) __attribute__((unused)) \
123 __attribute__((noinline)) id(void) { __asm__(""); }
124
125_CURL_WARNING(_curl_easy_setopt_err_long,
126 "curl_easy_setopt expects a long argument for this option")
127_CURL_WARNING(_curl_easy_setopt_err_curl_off_t,
128 "curl_easy_setopt expects a curl_off_t argument for this option")
129_CURL_WARNING(_curl_easy_setopt_err_string,
130 "curl_easy_setopt expects a string (char* or char[]) argument for this option"
131 )
132_CURL_WARNING(_curl_easy_setopt_err_write_callback,
133 "curl_easy_setopt expects a curl_write_callback argument for this option")
134_CURL_WARNING(_curl_easy_setopt_err_read_cb,
135 "curl_easy_setopt expects a curl_read_callback argument for this option")
136_CURL_WARNING(_curl_easy_setopt_err_ioctl_cb,
137 "curl_easy_setopt expects a curl_ioctl_callback argument for this option")
138_CURL_WARNING(_curl_easy_setopt_err_sockopt_cb,
139 "curl_easy_setopt expects a curl_sockopt_callback argument for this option")
140_CURL_WARNING(_curl_easy_setopt_err_opensocket_cb,
141 "curl_easy_setopt expects a curl_opensocket_callback argument for this option"
142 )
143_CURL_WARNING(_curl_easy_setopt_err_progress_cb,
144 "curl_easy_setopt expects a curl_progress_callback argument for this option")
145_CURL_WARNING(_curl_easy_setopt_err_debug_cb,
146 "curl_easy_setopt expects a curl_debug_callback argument for this option")
147_CURL_WARNING(_curl_easy_setopt_err_ssl_ctx_cb,
148 "curl_easy_setopt expects a curl_ssl_ctx_callback argument for this option")
149_CURL_WARNING(_curl_easy_setopt_err_conv_cb,
150 "curl_easy_setopt expects a curl_conv_callback argument for this option")
151_CURL_WARNING(_curl_easy_setopt_err_seek_cb,
152 "curl_easy_setopt expects a curl_seek_callback argument for this option")
153_CURL_WARNING(_curl_easy_setopt_err_cb_data,
154 "curl_easy_setopt expects a private data pointer as argument for this option")
155_CURL_WARNING(_curl_easy_setopt_err_error_buffer,
156 "curl_easy_setopt expects a char buffer of CURL_ERROR_SIZE as argument for this option")
157_CURL_WARNING(_curl_easy_setopt_err_FILE,
158 "curl_easy_setopt expects a FILE* argument for this option")
159_CURL_WARNING(_curl_easy_setopt_err_postfields,
160 "curl_easy_setopt expects a void* or char* argument for this option")
161_CURL_WARNING(_curl_easy_setopt_err_curl_httpost,
162 "curl_easy_setopt expects a struct curl_httppost* argument for this option")
163_CURL_WARNING(_curl_easy_setopt_err_curl_slist,
164 "curl_easy_setopt expects a struct curl_slist* argument for this option")
165_CURL_WARNING(_curl_easy_setopt_err_CURLSH,
166 "curl_easy_setopt expects a CURLSH* argument for this option")
167
168_CURL_WARNING(_curl_easy_getinfo_err_string,
169 "curl_easy_getinfo expects a pointer to char * for this info")
170_CURL_WARNING(_curl_easy_getinfo_err_long,
171 "curl_easy_getinfo expects a pointer to long for this info")
172_CURL_WARNING(_curl_easy_getinfo_err_double,
173 "curl_easy_getinfo expects a pointer to double for this info")
174_CURL_WARNING(_curl_easy_getinfo_err_curl_slist,
175 "curl_easy_getinfo expects a pointer to struct curl_slist * for this info")
176
177/* groups of curl_easy_setops options that take the same type of argument */
178
179/* To add a new option to one of the groups, just add
180 * (option) == CURLOPT_SOMETHING
181 * to the or-expression. If the option takes a long or curl_off_t, you don't
182 * have to do anything
183 */
184
185/* evaluates to true if option takes a long argument */
186#define _curl_is_long_option(option) \
187 (0 < (option) && (option) < CURLOPTTYPE_OBJECTPOINT)
188
189#define _curl_is_off_t_option(option) \
190 ((option) > CURLOPTTYPE_OFF_T)
191
192/* evaluates to true if option takes a char* argument */
193#define _curl_is_string_option(option) \
194 ((option) == CURLOPT_URL || \
195 (option) == CURLOPT_PROXY || \
196 (option) == CURLOPT_INTERFACE || \
197 (option) == CURLOPT_NETRC_FILE || \
198 (option) == CURLOPT_USERPWD || \
199 (option) == CURLOPT_PROXYUSERPWD || \
200 (option) == CURLOPT_ENCODING || \
201 (option) == CURLOPT_REFERER || \
202 (option) == CURLOPT_USERAGENT || \
203 (option) == CURLOPT_COOKIE || \
204 (option) == CURLOPT_COOKIEFILE || \
205 (option) == CURLOPT_COOKIEJAR || \
206 (option) == CURLOPT_COOKIELIST || \
207 (option) == CURLOPT_FTPPORT || \
208 (option) == CURLOPT_FTP_ALTERNATIVE_TO_USER || \
209 (option) == CURLOPT_FTP_ACCOUNT || \
210 (option) == CURLOPT_RANGE || \
211 (option) == CURLOPT_CUSTOMREQUEST || \
212 (option) == CURLOPT_SSLCERT || \
213 (option) == CURLOPT_SSLCERTTYPE || \
214 (option) == CURLOPT_SSLKEY || \
215 (option) == CURLOPT_SSLKEYTYPE || \
216 (option) == CURLOPT_KEYPASSWD || \
217 (option) == CURLOPT_SSLENGINE || \
218 (option) == CURLOPT_CAINFO || \
219 (option) == CURLOPT_CAPATH || \
220 (option) == CURLOPT_RANDOM_FILE || \
221 (option) == CURLOPT_EGDSOCKET || \
222 (option) == CURLOPT_SSL_CIPHER_LIST || \
223 (option) == CURLOPT_KRBLEVEL || \
224 (option) == CURLOPT_SSH_HOST_PUBLIC_KEY_MD5 || \
225 (option) == CURLOPT_SSH_PUBLIC_KEYFILE || \
226 (option) == CURLOPT_SSH_PRIVATE_KEYFILE || \
227 0)
228
229/* evaluates to true if option takes a curl_write_callback argument */
230#define _curl_is_write_cb_option(option) \
231 ((option) == CURLOPT_HEADERFUNCTION || \
232 (option) == CURLOPT_WRITEFUNCTION)
233
234/* evaluates to true if option takes a curl_conv_callback argument */
235#define _curl_is_conv_cb_option(option) \
236 ((option) == CURLOPT_CONV_TO_NETWORK_FUNCTION || \
237 (option) == CURLOPT_CONV_FROM_NETWORK_FUNCTION || \
238 (option) == CURLOPT_CONV_FROM_UTF8_FUNCTION)
239
240/* evaluates to true if option takes a data argument to pass to a callback */
241#define _curl_is_cb_data_option(option) \
242 ((option) == CURLOPT_WRITEDATA || \
243 (option) == CURLOPT_READDATA || \
244 (option) == CURLOPT_IOCTLDATA || \
245 (option) == CURLOPT_SOCKOPTDATA || \
246 (option) == CURLOPT_OPENSOCKETDATA || \
247 (option) == CURLOPT_PROGRESSDATA || \
248 (option) == CURLOPT_WRITEHEADER || \
249 (option) == CURLOPT_DEBUGDATA || \
250 (option) == CURLOPT_SSL_CTX_DATA || \
251 (option) == CURLOPT_SEEKDATA || \
252 (option) == CURLOPT_PRIVATE || \
253 0)
254
255/* evaluates to true if option takes a POST data argument (void* or char*) */
256#define _curl_is_postfields_option(option) \
257 ((option) == CURLOPT_POSTFIELDS || \
258 (option) == CURLOPT_COPYPOSTFIELDS || \
259 0)
260
261/* evaluates to true if option takes a struct curl_slist * argument */
262#define _curl_is_slist_option(option) \
263 ((option) == CURLOPT_HTTPHEADER || \
264 (option) == CURLOPT_HTTP200ALIASES || \
265 (option) == CURLOPT_QUOTE || \
266 (option) == CURLOPT_POSTQUOTE || \
267 (option) == CURLOPT_PREQUOTE || \
268 (option) == CURLOPT_TELNETOPTIONS || \
269 0)
270
271/* groups of curl_easy_getinfo infos that take the same type of argument */
272
273/* evaluates to true if info expects a pointer to char * argument */
274#define _curl_is_string_info(info) \
275 (CURLINFO_STRING < (info) && (info) < CURLINFO_LONG)
276
277/* evaluates to true if info expects a pointer to long argument */
278#define _curl_is_long_info(info) \
279 (CURLINFO_LONG < (info) && (info) < CURLINFO_DOUBLE)
280
281/* evaluates to true if info expects a pointer to double argument */
282#define _curl_is_double_info(info) \
283 (CURLINFO_DOUBLE < (info) && (info) < CURLINFO_SLIST)
284
285/* true if info expects a pointer to struct curl_slist * argument */
286#define _curl_is_slist_info(info) \
287 (CURLINFO_SLIST < (info))
288
289
290/* typecheck helpers -- check whether given expression has requested type*/
291
292/* For pointers, you can use the _curl_is_ptr/_curl_is_arr macros,
293 * otherwise define a new macro. Search for __builtin_types_compatible_p
294 * in the GCC manual.
295 * NOTE: these macros MUST NOT EVALUATE their arguments! The argument is
296 * the actual expression passed to the curl_easy_setopt macro. This
297 * means that you can only apply the sizeof and __typeof__ operators, no
298 * == or whatsoever.
299 */
300
301/* XXX: should evaluate to true iff expr is a pointer */
302#define _curl_is_any_ptr(expr) \
303 (sizeof(expr) == sizeof(void*))
304
305/* evaluates to true if expr is NULL */
306/* XXX: must not evaluate expr, so this check is not accurate */
307#define _curl_is_NULL(expr) \
308 (__builtin_types_compatible_p(__typeof__(expr), __typeof__(NULL)))
309
310/* evaluates to true if expr is type*, const type* or NULL */
311#define _curl_is_ptr(expr, type) \
312 (_curl_is_NULL(expr) || \
313 __builtin_types_compatible_p(__typeof__(expr), type *) || \
314 __builtin_types_compatible_p(__typeof__(expr), const type *))
315
316/* evaluates to true if expr is one of type[], type*, NULL or const type* */
317#define _curl_is_arr(expr, type) \
318 (_curl_is_ptr((expr), type) || \
319 __builtin_types_compatible_p(__typeof__(expr), type []))
320
321/* evaluates to true if expr is a string */
322#define _curl_is_string(expr) \
323 (_curl_is_arr((expr), char) || \
324 _curl_is_arr((expr), signed char) || \
325 _curl_is_arr((expr), unsigned char))
326
327/* evaluates to true if expr is a long (no matter the signedness)
328 * XXX: for now, int is also accepted (and therefore short and char, which
329 * are promoted to int when passed to a variadic function) */
330#define _curl_is_long(expr) \
331 (__builtin_types_compatible_p(__typeof__(expr), long) || \
332 __builtin_types_compatible_p(__typeof__(expr), signed long) || \
333 __builtin_types_compatible_p(__typeof__(expr), unsigned long) || \
334 __builtin_types_compatible_p(__typeof__(expr), int) || \
335 __builtin_types_compatible_p(__typeof__(expr), signed int) || \
336 __builtin_types_compatible_p(__typeof__(expr), unsigned int) || \
337 __builtin_types_compatible_p(__typeof__(expr), short) || \
338 __builtin_types_compatible_p(__typeof__(expr), signed short) || \
339 __builtin_types_compatible_p(__typeof__(expr), unsigned short) || \
340 __builtin_types_compatible_p(__typeof__(expr), char) || \
341 __builtin_types_compatible_p(__typeof__(expr), signed char) || \
342 __builtin_types_compatible_p(__typeof__(expr), unsigned char))
343
344/* evaluates to true if expr is of type curl_off_t */
345#define _curl_is_off_t(expr) \
346 (__builtin_types_compatible_p(__typeof__(expr), curl_off_t))
347
348/* evaluates to true if expr is abuffer suitable for CURLOPT_ERRORBUFFER */
349/* XXX: also check size of an char[] array? */
350#define _curl_is_error_buffer(expr) \
351 (__builtin_types_compatible_p(__typeof__(expr), char *) || \
352 __builtin_types_compatible_p(__typeof__(expr), char[]))
353
354/* evaluates to true if expr is of type (const) void* or (const) FILE* */
355#if 0
356#define _curl_is_cb_data(expr) \
357 (_curl_is_ptr((expr), void) || \
358 _curl_is_ptr((expr), FILE))
359#else /* be less strict */
360#define _curl_is_cb_data(expr) \
361 _curl_is_any_ptr(expr)
362#endif
363
364/* evaluates to true if expr is of type FILE* */
365#define _curl_is_FILE(expr) \
366 (__builtin_types_compatible_p(__typeof__(expr), FILE *))
367
368/* evaluates to true if expr can be passed as POST data (void* or char*) */
369#define _curl_is_postfields(expr) \
370 (_curl_is_ptr((expr), void) || \
371 _curl_is_arr((expr), char))
372
373/* FIXME: the whole callback checking is messy...
374 * The idea is to tolerate char vs. void and const vs. not const
375 * pointers in arguments at least
376 */
377/* helper: __builtin_types_compatible_p distinguishes between functions and
378 * function pointers, hide it */
379#define _curl_callback_compatible(func, type) \
380 (__builtin_types_compatible_p(__typeof__(func), type) || \
381 __builtin_types_compatible_p(__typeof__(func), type*))
382
383/* evaluates to true if expr is of type curl_read_callback or "similar" */
384#define _curl_is_read_cb(expr) \
385 (_curl_is_NULL(expr) || \
386 __builtin_types_compatible_p(__typeof__(expr), __typeof__(fread)) || \
387 __builtin_types_compatible_p(__typeof__(expr), curl_read_callback) || \
388 _curl_callback_compatible((expr), _curl_read_callback1) || \
389 _curl_callback_compatible((expr), _curl_read_callback2) || \
390 _curl_callback_compatible((expr), _curl_read_callback3) || \
391 _curl_callback_compatible((expr), _curl_read_callback4) || \
392 _curl_callback_compatible((expr), _curl_read_callback5) || \
393 _curl_callback_compatible((expr), _curl_read_callback6))
394typedef size_t (_curl_read_callback1)(char *, size_t, size_t, void*);
395typedef size_t (_curl_read_callback2)(char *, size_t, size_t, const void*);
396typedef size_t (_curl_read_callback3)(char *, size_t, size_t, FILE*);
397typedef size_t (_curl_read_callback4)(void *, size_t, size_t, void*);
398typedef size_t (_curl_read_callback5)(void *, size_t, size_t, const void*);
399typedef size_t (_curl_read_callback6)(void *, size_t, size_t, FILE*);
400
401/* evaluates to true if expr is of type curl_write_callback or "similar" */
402#define _curl_is_write_cb(expr) \
403 (_curl_is_read_cb(expr) || \
404 __builtin_types_compatible_p(__typeof__(expr), __typeof__(fwrite)) || \
405 __builtin_types_compatible_p(__typeof__(expr), curl_write_callback) || \
406 _curl_callback_compatible((expr), _curl_write_callback1) || \
407 _curl_callback_compatible((expr), _curl_write_callback2) || \
408 _curl_callback_compatible((expr), _curl_write_callback3) || \
409 _curl_callback_compatible((expr), _curl_write_callback4) || \
410 _curl_callback_compatible((expr), _curl_write_callback5) || \
411 _curl_callback_compatible((expr), _curl_write_callback6))
412typedef size_t (_curl_write_callback1)(const char *, size_t, size_t, void*);
413typedef size_t (_curl_write_callback2)(const char *, size_t, size_t,
414 const void*);
415typedef size_t (_curl_write_callback3)(const char *, size_t, size_t, FILE*);
416typedef size_t (_curl_write_callback4)(const void *, size_t, size_t, void*);
417typedef size_t (_curl_write_callback5)(const void *, size_t, size_t,
418 const void*);
419typedef size_t (_curl_write_callback6)(const void *, size_t, size_t, FILE*);
420
421/* evaluates to true if expr is of type curl_ioctl_callback or "similar" */
422#define _curl_is_ioctl_cb(expr) \
423 (_curl_is_NULL(expr) || \
424 __builtin_types_compatible_p(__typeof__(expr), curl_ioctl_callback) || \
425 _curl_callback_compatible((expr), _curl_ioctl_callback1) || \
426 _curl_callback_compatible((expr), _curl_ioctl_callback2) || \
427 _curl_callback_compatible((expr), _curl_ioctl_callback3) || \
428 _curl_callback_compatible((expr), _curl_ioctl_callback4))
429typedef curlioerr (_curl_ioctl_callback1)(CURL *, int, void*);
430typedef curlioerr (_curl_ioctl_callback2)(CURL *, int, const void*);
431typedef curlioerr (_curl_ioctl_callback3)(CURL *, curliocmd, void*);
432typedef curlioerr (_curl_ioctl_callback4)(CURL *, curliocmd, const void*);
433
434/* evaluates to true if expr is of type curl_sockopt_callback or "similar" */
435#define _curl_is_sockopt_cb(expr) \
436 (_curl_is_NULL(expr) || \
437 __builtin_types_compatible_p(__typeof__(expr), curl_sockopt_callback) || \
438 _curl_callback_compatible((expr), _curl_sockopt_callback1) || \
439 _curl_callback_compatible((expr), _curl_sockopt_callback2))
440typedef int (_curl_sockopt_callback1)(void *, curl_socket_t, curlsocktype);
441typedef int (_curl_sockopt_callback2)(const void *, curl_socket_t,
442 curlsocktype);
443
444/* evaluates to true if expr is of type curl_opensocket_callback or "similar" */
445#define _curl_is_opensocket_cb(expr) \
446 (_curl_is_NULL(expr) || \
447 __builtin_types_compatible_p(__typeof__(expr), curl_opensocket_callback) ||\
448 _curl_callback_compatible((expr), _curl_opensocket_callback1) || \
449 _curl_callback_compatible((expr), _curl_opensocket_callback2) || \
450 _curl_callback_compatible((expr), _curl_opensocket_callback3) || \
451 _curl_callback_compatible((expr), _curl_opensocket_callback4))
452typedef curl_socket_t (_curl_opensocket_callback1)
453 (void *, curlsocktype, struct curl_sockaddr *);
454typedef curl_socket_t (_curl_opensocket_callback2)
455 (void *, curlsocktype, const struct curl_sockaddr *);
456typedef curl_socket_t (_curl_opensocket_callback3)
457 (const void *, curlsocktype, struct curl_sockaddr *);
458typedef curl_socket_t (_curl_opensocket_callback4)
459 (const void *, curlsocktype, const struct curl_sockaddr *);
460
461/* evaluates to true if expr is of type curl_progress_callback or "similar" */
462#define _curl_is_progress_cb(expr) \
463 (_curl_is_NULL(expr) || \
464 __builtin_types_compatible_p(__typeof__(expr), curl_progress_callback) || \
465 _curl_callback_compatible((expr), _curl_progress_callback1) || \
466 _curl_callback_compatible((expr), _curl_progress_callback2))
467typedef int (_curl_progress_callback1)(void *,
468 double, double, double, double);
469typedef int (_curl_progress_callback2)(const void *,
470 double, double, double, double);
471
472/* evaluates to true if expr is of type curl_debug_callback or "similar" */
473#define _curl_is_debug_cb(expr) \
474 (_curl_is_NULL(expr) || \
475 __builtin_types_compatible_p(__typeof__(expr), curl_debug_callback) || \
476 _curl_callback_compatible((expr), _curl_debug_callback1) || \
477 _curl_callback_compatible((expr), _curl_debug_callback2) || \
478 _curl_callback_compatible((expr), _curl_debug_callback3) || \
479 _curl_callback_compatible((expr), _curl_debug_callback4))
480typedef int (_curl_debug_callback1) (CURL *,
481 curl_infotype, char *, size_t, void *);
482typedef int (_curl_debug_callback2) (CURL *,
483 curl_infotype, char *, size_t, const void *);
484typedef int (_curl_debug_callback3) (CURL *,
485 curl_infotype, const char *, size_t, void *);
486typedef int (_curl_debug_callback4) (CURL *,
487 curl_infotype, const char *, size_t, const void *);
488
489/* evaluates to true if expr is of type curl_ssl_ctx_callback or "similar" */
490/* this is getting even messier... */
491#define _curl_is_ssl_ctx_cb(expr) \
492 (_curl_is_NULL(expr) || \
493 __builtin_types_compatible_p(__typeof__(expr), curl_ssl_ctx_callback) || \
494 _curl_callback_compatible((expr), _curl_ssl_ctx_callback1) || \
495 _curl_callback_compatible((expr), _curl_ssl_ctx_callback2) || \
496 _curl_callback_compatible((expr), _curl_ssl_ctx_callback3) || \
497 _curl_callback_compatible((expr), _curl_ssl_ctx_callback4) || \
498 _curl_callback_compatible((expr), _curl_ssl_ctx_callback5) || \
499 _curl_callback_compatible((expr), _curl_ssl_ctx_callback6) || \
500 _curl_callback_compatible((expr), _curl_ssl_ctx_callback7) || \
501 _curl_callback_compatible((expr), _curl_ssl_ctx_callback8))
502typedef CURLcode (_curl_ssl_ctx_callback1)(CURL *, void *, void *);
503typedef CURLcode (_curl_ssl_ctx_callback2)(CURL *, void *, const void *);
504typedef CURLcode (_curl_ssl_ctx_callback3)(CURL *, const void *, void *);
505typedef CURLcode (_curl_ssl_ctx_callback4)(CURL *, const void *, const void *);
506#ifdef HEADER_SSL_H
507/* hack: if we included OpenSSL's ssl.h, we know about SSL_CTX
508 * this will of course break if we're included before OpenSSL headers...
509 */
510typedef CURLcode (_curl_ssl_ctx_callback5)(CURL *, SSL_CTX, void *);
511typedef CURLcode (_curl_ssl_ctx_callback6)(CURL *, SSL_CTX, const void *);
512typedef CURLcode (_curl_ssl_ctx_callback7)(CURL *, const SSL_CTX, void *);
513typedef CURLcode (_curl_ssl_ctx_callback8)(CURL *, const SSL_CTX, const void *);
514#else
515typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback5;
516typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback6;
517typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback7;
518typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback8;
519#endif
520
521/* evaluates to true if expr is of type curl_conv_callback or "similar" */
522#define _curl_is_conv_cb(expr) \
523 (_curl_is_NULL(expr) || \
524 __builtin_types_compatible_p(__typeof__(expr), curl_conv_callback) || \
525 _curl_callback_compatible((expr), _curl_conv_callback1) || \
526 _curl_callback_compatible((expr), _curl_conv_callback2) || \
527 _curl_callback_compatible((expr), _curl_conv_callback3) || \
528 _curl_callback_compatible((expr), _curl_conv_callback4))
529typedef CURLcode (*_curl_conv_callback1)(char *, size_t length);
530typedef CURLcode (*_curl_conv_callback2)(const char *, size_t length);
531typedef CURLcode (*_curl_conv_callback3)(void *, size_t length);
532typedef CURLcode (*_curl_conv_callback4)(const void *, size_t length);
533
534/* evaluates to true if expr is of type curl_seek_callback or "similar" */
535#define _curl_is_seek_cb(expr) \
536 (_curl_is_NULL(expr) || \
537 __builtin_types_compatible_p(__typeof__(expr), curl_seek_callback) || \
538 _curl_callback_compatible((expr), _curl_seek_callback1) || \
539 _curl_callback_compatible((expr), _curl_seek_callback2))
540typedef CURLcode (*_curl_seek_callback1)(void *, curl_off_t, int);
541typedef CURLcode (*_curl_seek_callback2)(const void *, curl_off_t, int);
542
543
544#endif /* __CURL_TYPECHECK_GCC_H */
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