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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 - 2015, 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/* wraps curl_easy_setopt() with typechecking */
26
27/* To add a new kind of warning, add an
28 * if(_curl_is_sometype_option(_curl_opt))
29 * if(!_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 * NOTE: We use two nested 'if' statements here instead of the && operator, in
35 * order to work around gcc bug #32061. It affects only gcc 4.3.x/4.4.x
36 * when compiling with -Wlogical-op.
37 *
38 * To add an option that uses the same type as an existing option, you'll just
39 * need to extend the appropriate _curl_*_option macro
40 */
41#define curl_easy_setopt(handle, option, value) \
42__extension__ ({ \
43 __typeof__ (option) _curl_opt = option; \
44 if(__builtin_constant_p(_curl_opt)) { \
45 if(_curl_is_long_option(_curl_opt)) \
46 if(!_curl_is_long(value)) \
47 _curl_easy_setopt_err_long(); \
48 if(_curl_is_off_t_option(_curl_opt)) \
49 if(!_curl_is_off_t(value)) \
50 _curl_easy_setopt_err_curl_off_t(); \
51 if(_curl_is_string_option(_curl_opt)) \
52 if(!_curl_is_string(value)) \
53 _curl_easy_setopt_err_string(); \
54 if(_curl_is_write_cb_option(_curl_opt)) \
55 if(!_curl_is_write_cb(value)) \
56 _curl_easy_setopt_err_write_callback(); \
57 if((_curl_opt) == CURLOPT_READFUNCTION) \
58 if(!_curl_is_read_cb(value)) \
59 _curl_easy_setopt_err_read_cb(); \
60 if((_curl_opt) == CURLOPT_IOCTLFUNCTION) \
61 if(!_curl_is_ioctl_cb(value)) \
62 _curl_easy_setopt_err_ioctl_cb(); \
63 if((_curl_opt) == CURLOPT_SOCKOPTFUNCTION) \
64 if(!_curl_is_sockopt_cb(value)) \
65 _curl_easy_setopt_err_sockopt_cb(); \
66 if((_curl_opt) == CURLOPT_OPENSOCKETFUNCTION) \
67 if(!_curl_is_opensocket_cb(value)) \
68 _curl_easy_setopt_err_opensocket_cb(); \
69 if((_curl_opt) == CURLOPT_PROGRESSFUNCTION) \
70 if(!_curl_is_progress_cb(value)) \
71 _curl_easy_setopt_err_progress_cb(); \
72 if((_curl_opt) == CURLOPT_DEBUGFUNCTION) \
73 if(!_curl_is_debug_cb(value)) \
74 _curl_easy_setopt_err_debug_cb(); \
75 if((_curl_opt) == CURLOPT_SSL_CTX_FUNCTION) \
76 if(!_curl_is_ssl_ctx_cb(value)) \
77 _curl_easy_setopt_err_ssl_ctx_cb(); \
78 if(_curl_is_conv_cb_option(_curl_opt)) \
79 if(!_curl_is_conv_cb(value)) \
80 _curl_easy_setopt_err_conv_cb(); \
81 if((_curl_opt) == CURLOPT_SEEKFUNCTION) \
82 if(!_curl_is_seek_cb(value)) \
83 _curl_easy_setopt_err_seek_cb(); \
84 if(_curl_is_cb_data_option(_curl_opt)) \
85 if(!_curl_is_cb_data(value)) \
86 _curl_easy_setopt_err_cb_data(); \
87 if((_curl_opt) == CURLOPT_ERRORBUFFER) \
88 if(!_curl_is_error_buffer(value)) \
89 _curl_easy_setopt_err_error_buffer(); \
90 if((_curl_opt) == CURLOPT_STDERR) \
91 if(!_curl_is_FILE(value)) \
92 _curl_easy_setopt_err_FILE(); \
93 if(_curl_is_postfields_option(_curl_opt)) \
94 if(!_curl_is_postfields(value)) \
95 _curl_easy_setopt_err_postfields(); \
96 if((_curl_opt) == CURLOPT_HTTPPOST) \
97 if(!_curl_is_arr((value), struct curl_httppost)) \
98 _curl_easy_setopt_err_curl_httpost(); \
99 if(_curl_is_slist_option(_curl_opt)) \
100 if(!_curl_is_arr((value), struct curl_slist)) \
101 _curl_easy_setopt_err_curl_slist(); \
102 if((_curl_opt) == CURLOPT_SHARE) \
103 if(!_curl_is_ptr((value), CURLSH)) \
104 _curl_easy_setopt_err_CURLSH(); \
105 } \
106 curl_easy_setopt(handle, _curl_opt, value); \
107})
108
109/* wraps curl_easy_getinfo() with typechecking */
110/* FIXME: don't allow const pointers */
111#define curl_easy_getinfo(handle, info, arg) \
112__extension__ ({ \
113 __typeof__ (info) _curl_info = info; \
114 if(__builtin_constant_p(_curl_info)) { \
115 if(_curl_is_string_info(_curl_info)) \
116 if(!_curl_is_arr((arg), char *)) \
117 _curl_easy_getinfo_err_string(); \
118 if(_curl_is_long_info(_curl_info)) \
119 if(!_curl_is_arr((arg), long)) \
120 _curl_easy_getinfo_err_long(); \
121 if(_curl_is_double_info(_curl_info)) \
122 if(!_curl_is_arr((arg), double)) \
123 _curl_easy_getinfo_err_double(); \
124 if(_curl_is_slist_info(_curl_info)) \
125 if(!_curl_is_arr((arg), struct curl_slist *)) \
126 _curl_easy_getinfo_err_curl_slist(); \
127 } \
128 curl_easy_getinfo(handle, _curl_info, arg); \
129})
130
131/* TODO: typechecking for curl_share_setopt() and curl_multi_setopt(),
132 * for now just make sure that the functions are called with three
133 * arguments
134 */
135#define curl_share_setopt(share,opt,param) curl_share_setopt(share,opt,param)
136#define curl_multi_setopt(handle,opt,param) curl_multi_setopt(handle,opt,param)
137
138
139/* the actual warnings, triggered by calling the _curl_easy_setopt_err*
140 * functions */
141
142/* To define a new warning, use _CURL_WARNING(identifier, "message") */
143#define _CURL_WARNING(id, message) \
144 static void __attribute__((__warning__(message))) \
145 __attribute__((__unused__)) __attribute__((__noinline__)) \
146 id(void) { __asm__(""); }
147
148_CURL_WARNING(_curl_easy_setopt_err_long,
149 "curl_easy_setopt expects a long argument for this option")
150_CURL_WARNING(_curl_easy_setopt_err_curl_off_t,
151 "curl_easy_setopt expects a curl_off_t argument for this option")
152_CURL_WARNING(_curl_easy_setopt_err_string,
153 "curl_easy_setopt expects a "
154 "string (char* or char[]) argument for this option"
155 )
156_CURL_WARNING(_curl_easy_setopt_err_write_callback,
157 "curl_easy_setopt expects a curl_write_callback argument for this option")
158_CURL_WARNING(_curl_easy_setopt_err_read_cb,
159 "curl_easy_setopt expects a curl_read_callback argument for this option")
160_CURL_WARNING(_curl_easy_setopt_err_ioctl_cb,
161 "curl_easy_setopt expects a curl_ioctl_callback argument for this option")
162_CURL_WARNING(_curl_easy_setopt_err_sockopt_cb,
163 "curl_easy_setopt expects a curl_sockopt_callback argument for this option")
164_CURL_WARNING(_curl_easy_setopt_err_opensocket_cb,
165 "curl_easy_setopt expects a "
166 "curl_opensocket_callback argument for this option"
167 )
168_CURL_WARNING(_curl_easy_setopt_err_progress_cb,
169 "curl_easy_setopt expects a curl_progress_callback argument for this option")
170_CURL_WARNING(_curl_easy_setopt_err_debug_cb,
171 "curl_easy_setopt expects a curl_debug_callback argument for this option")
172_CURL_WARNING(_curl_easy_setopt_err_ssl_ctx_cb,
173 "curl_easy_setopt expects a curl_ssl_ctx_callback argument for this option")
174_CURL_WARNING(_curl_easy_setopt_err_conv_cb,
175 "curl_easy_setopt expects a curl_conv_callback argument for this option")
176_CURL_WARNING(_curl_easy_setopt_err_seek_cb,
177 "curl_easy_setopt expects a curl_seek_callback argument for this option")
178_CURL_WARNING(_curl_easy_setopt_err_cb_data,
179 "curl_easy_setopt expects a "
180 "private data pointer as argument for this option")
181_CURL_WARNING(_curl_easy_setopt_err_error_buffer,
182 "curl_easy_setopt expects a "
183 "char buffer of CURL_ERROR_SIZE as argument for this option")
184_CURL_WARNING(_curl_easy_setopt_err_FILE,
185 "curl_easy_setopt expects a FILE* argument for this option")
186_CURL_WARNING(_curl_easy_setopt_err_postfields,
187 "curl_easy_setopt expects a void* or char* argument for this option")
188_CURL_WARNING(_curl_easy_setopt_err_curl_httpost,
189 "curl_easy_setopt expects a struct curl_httppost* argument for this option")
190_CURL_WARNING(_curl_easy_setopt_err_curl_slist,
191 "curl_easy_setopt expects a struct curl_slist* argument for this option")
192_CURL_WARNING(_curl_easy_setopt_err_CURLSH,
193 "curl_easy_setopt expects a CURLSH* argument for this option")
194
195_CURL_WARNING(_curl_easy_getinfo_err_string,
196 "curl_easy_getinfo expects a pointer to char * for this info")
197_CURL_WARNING(_curl_easy_getinfo_err_long,
198 "curl_easy_getinfo expects a pointer to long for this info")
199_CURL_WARNING(_curl_easy_getinfo_err_double,
200 "curl_easy_getinfo expects a pointer to double for this info")
201_CURL_WARNING(_curl_easy_getinfo_err_curl_slist,
202 "curl_easy_getinfo expects a pointer to struct curl_slist * for this info")
203
204/* groups of curl_easy_setops options that take the same type of argument */
205
206/* To add a new option to one of the groups, just add
207 * (option) == CURLOPT_SOMETHING
208 * to the or-expression. If the option takes a long or curl_off_t, you don't
209 * have to do anything
210 */
211
212/* evaluates to true if option takes a long argument */
213#define _curl_is_long_option(option) \
214 (0 < (option) && (option) < CURLOPTTYPE_OBJECTPOINT)
215
216#define _curl_is_off_t_option(option) \
217 ((option) > CURLOPTTYPE_OFF_T)
218
219/* evaluates to true if option takes a char* argument */
220#define _curl_is_string_option(option) \
221 ((option) == CURLOPT_ACCEPT_ENCODING || \
222 (option) == CURLOPT_CAINFO || \
223 (option) == CURLOPT_CAPATH || \
224 (option) == CURLOPT_COOKIE || \
225 (option) == CURLOPT_COOKIEFILE || \
226 (option) == CURLOPT_COOKIEJAR || \
227 (option) == CURLOPT_COOKIELIST || \
228 (option) == CURLOPT_CRLFILE || \
229 (option) == CURLOPT_CUSTOMREQUEST || \
230 (option) == CURLOPT_DEFAULT_PROTOCOL || \
231 (option) == CURLOPT_DNS_INTERFACE || \
232 (option) == CURLOPT_DNS_LOCAL_IP4 || \
233 (option) == CURLOPT_DNS_LOCAL_IP6 || \
234 (option) == CURLOPT_DNS_SERVERS || \
235 (option) == CURLOPT_EGDSOCKET || \
236 (option) == CURLOPT_FTPPORT || \
237 (option) == CURLOPT_FTP_ACCOUNT || \
238 (option) == CURLOPT_FTP_ALTERNATIVE_TO_USER || \
239 (option) == CURLOPT_INTERFACE || \
240 (option) == CURLOPT_ISSUERCERT || \
241 (option) == CURLOPT_KEYPASSWD || \
242 (option) == CURLOPT_KRBLEVEL || \
243 (option) == CURLOPT_LOGIN_OPTIONS || \
244 (option) == CURLOPT_MAIL_AUTH || \
245 (option) == CURLOPT_MAIL_FROM || \
246 (option) == CURLOPT_NETRC_FILE || \
247 (option) == CURLOPT_NOPROXY || \
248 (option) == CURLOPT_PASSWORD || \
249 (option) == CURLOPT_PINNEDPUBLICKEY || \
250 (option) == CURLOPT_PROXY || \
251 (option) == CURLOPT_PROXYPASSWORD || \
252 (option) == CURLOPT_PROXYUSERNAME || \
253 (option) == CURLOPT_PROXYUSERPWD || \
254 (option) == CURLOPT_PROXY_SERVICE_NAME || \
255 (option) == CURLOPT_RANDOM_FILE || \
256 (option) == CURLOPT_RANGE || \
257 (option) == CURLOPT_REFERER || \
258 (option) == CURLOPT_RTSP_SESSION_ID || \
259 (option) == CURLOPT_RTSP_STREAM_URI || \
260 (option) == CURLOPT_RTSP_TRANSPORT || \
261 (option) == CURLOPT_SERVICE_NAME || \
262 (option) == CURLOPT_SOCKS5_GSSAPI_SERVICE || \
263 (option) == CURLOPT_SSH_HOST_PUBLIC_KEY_MD5 || \
264 (option) == CURLOPT_SSH_KNOWNHOSTS || \
265 (option) == CURLOPT_SSH_PRIVATE_KEYFILE || \
266 (option) == CURLOPT_SSH_PUBLIC_KEYFILE || \
267 (option) == CURLOPT_SSLCERT || \
268 (option) == CURLOPT_SSLCERTTYPE || \
269 (option) == CURLOPT_SSLENGINE || \
270 (option) == CURLOPT_SSLKEY || \
271 (option) == CURLOPT_SSLKEYTYPE || \
272 (option) == CURLOPT_SSL_CIPHER_LIST || \
273 (option) == CURLOPT_TLSAUTH_PASSWORD || \
274 (option) == CURLOPT_TLSAUTH_TYPE || \
275 (option) == CURLOPT_TLSAUTH_USERNAME || \
276 (option) == CURLOPT_UNIX_SOCKET_PATH || \
277 (option) == CURLOPT_URL || \
278 (option) == CURLOPT_USERAGENT || \
279 (option) == CURLOPT_USERNAME || \
280 (option) == CURLOPT_USERPWD || \
281 (option) == CURLOPT_XOAUTH2_BEARER || \
282 0)
283
284/* evaluates to true if option takes a curl_write_callback argument */
285#define _curl_is_write_cb_option(option) \
286 ((option) == CURLOPT_HEADERFUNCTION || \
287 (option) == CURLOPT_WRITEFUNCTION)
288
289/* evaluates to true if option takes a curl_conv_callback argument */
290#define _curl_is_conv_cb_option(option) \
291 ((option) == CURLOPT_CONV_TO_NETWORK_FUNCTION || \
292 (option) == CURLOPT_CONV_FROM_NETWORK_FUNCTION || \
293 (option) == CURLOPT_CONV_FROM_UTF8_FUNCTION)
294
295/* evaluates to true if option takes a data argument to pass to a callback */
296#define _curl_is_cb_data_option(option) \
297 ((option) == CURLOPT_CHUNK_DATA || \
298 (option) == CURLOPT_CLOSESOCKETDATA || \
299 (option) == CURLOPT_DEBUGDATA || \
300 (option) == CURLOPT_FNMATCH_DATA || \
301 (option) == CURLOPT_HEADERDATA || \
302 (option) == CURLOPT_INTERLEAVEDATA || \
303 (option) == CURLOPT_IOCTLDATA || \
304 (option) == CURLOPT_OPENSOCKETDATA || \
305 (option) == CURLOPT_PRIVATE || \
306 (option) == CURLOPT_PROGRESSDATA || \
307 (option) == CURLOPT_READDATA || \
308 (option) == CURLOPT_SEEKDATA || \
309 (option) == CURLOPT_SOCKOPTDATA || \
310 (option) == CURLOPT_SSH_KEYDATA || \
311 (option) == CURLOPT_SSL_CTX_DATA || \
312 (option) == CURLOPT_WRITEDATA || \
313 0)
314
315/* evaluates to true if option takes a POST data argument (void* or char*) */
316#define _curl_is_postfields_option(option) \
317 ((option) == CURLOPT_POSTFIELDS || \
318 (option) == CURLOPT_COPYPOSTFIELDS || \
319 0)
320
321/* evaluates to true if option takes a struct curl_slist * argument */
322#define _curl_is_slist_option(option) \
323 ((option) == CURLOPT_HTTP200ALIASES || \
324 (option) == CURLOPT_HTTPHEADER || \
325 (option) == CURLOPT_MAIL_RCPT || \
326 (option) == CURLOPT_POSTQUOTE || \
327 (option) == CURLOPT_PREQUOTE || \
328 (option) == CURLOPT_PROXYHEADER || \
329 (option) == CURLOPT_QUOTE || \
330 (option) == CURLOPT_RESOLVE || \
331 (option) == CURLOPT_TELNETOPTIONS || \
332 0)
333
334/* groups of curl_easy_getinfo infos that take the same type of argument */
335
336/* evaluates to true if info expects a pointer to char * argument */
337#define _curl_is_string_info(info) \
338 (CURLINFO_STRING < (info) && (info) < CURLINFO_LONG)
339
340/* evaluates to true if info expects a pointer to long argument */
341#define _curl_is_long_info(info) \
342 (CURLINFO_LONG < (info) && (info) < CURLINFO_DOUBLE)
343
344/* evaluates to true if info expects a pointer to double argument */
345#define _curl_is_double_info(info) \
346 (CURLINFO_DOUBLE < (info) && (info) < CURLINFO_SLIST)
347
348/* true if info expects a pointer to struct curl_slist * argument */
349#define _curl_is_slist_info(info) \
350 (CURLINFO_SLIST < (info))
351
352
353/* typecheck helpers -- check whether given expression has requested type*/
354
355/* For pointers, you can use the _curl_is_ptr/_curl_is_arr macros,
356 * otherwise define a new macro. Search for __builtin_types_compatible_p
357 * in the GCC manual.
358 * NOTE: these macros MUST NOT EVALUATE their arguments! The argument is
359 * the actual expression passed to the curl_easy_setopt macro. This
360 * means that you can only apply the sizeof and __typeof__ operators, no
361 * == or whatsoever.
362 */
363
364/* XXX: should evaluate to true iff expr is a pointer */
365#define _curl_is_any_ptr(expr) \
366 (sizeof(expr) == sizeof(void*))
367
368/* evaluates to true if expr is NULL */
369/* XXX: must not evaluate expr, so this check is not accurate */
370#define _curl_is_NULL(expr) \
371 (__builtin_types_compatible_p(__typeof__(expr), __typeof__(NULL)))
372
373/* evaluates to true if expr is type*, const type* or NULL */
374#define _curl_is_ptr(expr, type) \
375 (_curl_is_NULL(expr) || \
376 __builtin_types_compatible_p(__typeof__(expr), type *) || \
377 __builtin_types_compatible_p(__typeof__(expr), const type *))
378
379/* evaluates to true if expr is one of type[], type*, NULL or const type* */
380#define _curl_is_arr(expr, type) \
381 (_curl_is_ptr((expr), type) || \
382 __builtin_types_compatible_p(__typeof__(expr), type []))
383
384/* evaluates to true if expr is a string */
385#define _curl_is_string(expr) \
386 (_curl_is_arr((expr), char) || \
387 _curl_is_arr((expr), signed char) || \
388 _curl_is_arr((expr), unsigned char))
389
390/* evaluates to true if expr is a long (no matter the signedness)
391 * XXX: for now, int is also accepted (and therefore short and char, which
392 * are promoted to int when passed to a variadic function) */
393#define _curl_is_long(expr) \
394 (__builtin_types_compatible_p(__typeof__(expr), long) || \
395 __builtin_types_compatible_p(__typeof__(expr), signed long) || \
396 __builtin_types_compatible_p(__typeof__(expr), unsigned long) || \
397 __builtin_types_compatible_p(__typeof__(expr), int) || \
398 __builtin_types_compatible_p(__typeof__(expr), signed int) || \
399 __builtin_types_compatible_p(__typeof__(expr), unsigned int) || \
400 __builtin_types_compatible_p(__typeof__(expr), short) || \
401 __builtin_types_compatible_p(__typeof__(expr), signed short) || \
402 __builtin_types_compatible_p(__typeof__(expr), unsigned short) || \
403 __builtin_types_compatible_p(__typeof__(expr), char) || \
404 __builtin_types_compatible_p(__typeof__(expr), signed char) || \
405 __builtin_types_compatible_p(__typeof__(expr), unsigned char))
406
407/* evaluates to true if expr is of type curl_off_t */
408#define _curl_is_off_t(expr) \
409 (__builtin_types_compatible_p(__typeof__(expr), curl_off_t))
410
411/* evaluates to true if expr is abuffer suitable for CURLOPT_ERRORBUFFER */
412/* XXX: also check size of an char[] array? */
413#define _curl_is_error_buffer(expr) \
414 (_curl_is_NULL(expr) || \
415 __builtin_types_compatible_p(__typeof__(expr), char *) || \
416 __builtin_types_compatible_p(__typeof__(expr), char[]))
417
418/* evaluates to true if expr is of type (const) void* or (const) FILE* */
419#if 0
420#define _curl_is_cb_data(expr) \
421 (_curl_is_ptr((expr), void) || \
422 _curl_is_ptr((expr), FILE))
423#else /* be less strict */
424#define _curl_is_cb_data(expr) \
425 _curl_is_any_ptr(expr)
426#endif
427
428/* evaluates to true if expr is of type FILE* */
429#define _curl_is_FILE(expr) \
430 (__builtin_types_compatible_p(__typeof__(expr), FILE *))
431
432/* evaluates to true if expr can be passed as POST data (void* or char*) */
433#define _curl_is_postfields(expr) \
434 (_curl_is_ptr((expr), void) || \
435 _curl_is_arr((expr), char))
436
437/* FIXME: the whole callback checking is messy...
438 * The idea is to tolerate char vs. void and const vs. not const
439 * pointers in arguments at least
440 */
441/* helper: __builtin_types_compatible_p distinguishes between functions and
442 * function pointers, hide it */
443#define _curl_callback_compatible(func, type) \
444 (__builtin_types_compatible_p(__typeof__(func), type) || \
445 __builtin_types_compatible_p(__typeof__(func), type*))
446
447/* evaluates to true if expr is of type curl_read_callback or "similar" */
448#define _curl_is_read_cb(expr) \
449 (_curl_is_NULL(expr) || \
450 __builtin_types_compatible_p(__typeof__(expr), __typeof__(fread)) || \
451 __builtin_types_compatible_p(__typeof__(expr), curl_read_callback) || \
452 _curl_callback_compatible((expr), _curl_read_callback1) || \
453 _curl_callback_compatible((expr), _curl_read_callback2) || \
454 _curl_callback_compatible((expr), _curl_read_callback3) || \
455 _curl_callback_compatible((expr), _curl_read_callback4) || \
456 _curl_callback_compatible((expr), _curl_read_callback5) || \
457 _curl_callback_compatible((expr), _curl_read_callback6))
458typedef size_t (_curl_read_callback1)(char *, size_t, size_t, void*);
459typedef size_t (_curl_read_callback2)(char *, size_t, size_t, const void*);
460typedef size_t (_curl_read_callback3)(char *, size_t, size_t, FILE*);
461typedef size_t (_curl_read_callback4)(void *, size_t, size_t, void*);
462typedef size_t (_curl_read_callback5)(void *, size_t, size_t, const void*);
463typedef size_t (_curl_read_callback6)(void *, size_t, size_t, FILE*);
464
465/* evaluates to true if expr is of type curl_write_callback or "similar" */
466#define _curl_is_write_cb(expr) \
467 (_curl_is_read_cb(expr) || \
468 __builtin_types_compatible_p(__typeof__(expr), __typeof__(fwrite)) || \
469 __builtin_types_compatible_p(__typeof__(expr), curl_write_callback) || \
470 _curl_callback_compatible((expr), _curl_write_callback1) || \
471 _curl_callback_compatible((expr), _curl_write_callback2) || \
472 _curl_callback_compatible((expr), _curl_write_callback3) || \
473 _curl_callback_compatible((expr), _curl_write_callback4) || \
474 _curl_callback_compatible((expr), _curl_write_callback5) || \
475 _curl_callback_compatible((expr), _curl_write_callback6))
476typedef size_t (_curl_write_callback1)(const char *, size_t, size_t, void*);
477typedef size_t (_curl_write_callback2)(const char *, size_t, size_t,
478 const void*);
479typedef size_t (_curl_write_callback3)(const char *, size_t, size_t, FILE*);
480typedef size_t (_curl_write_callback4)(const void *, size_t, size_t, void*);
481typedef size_t (_curl_write_callback5)(const void *, size_t, size_t,
482 const void*);
483typedef size_t (_curl_write_callback6)(const void *, size_t, size_t, FILE*);
484
485/* evaluates to true if expr is of type curl_ioctl_callback or "similar" */
486#define _curl_is_ioctl_cb(expr) \
487 (_curl_is_NULL(expr) || \
488 __builtin_types_compatible_p(__typeof__(expr), curl_ioctl_callback) || \
489 _curl_callback_compatible((expr), _curl_ioctl_callback1) || \
490 _curl_callback_compatible((expr), _curl_ioctl_callback2) || \
491 _curl_callback_compatible((expr), _curl_ioctl_callback3) || \
492 _curl_callback_compatible((expr), _curl_ioctl_callback4))
493typedef curlioerr (_curl_ioctl_callback1)(CURL *, int, void*);
494typedef curlioerr (_curl_ioctl_callback2)(CURL *, int, const void*);
495typedef curlioerr (_curl_ioctl_callback3)(CURL *, curliocmd, void*);
496typedef curlioerr (_curl_ioctl_callback4)(CURL *, curliocmd, const void*);
497
498/* evaluates to true if expr is of type curl_sockopt_callback or "similar" */
499#define _curl_is_sockopt_cb(expr) \
500 (_curl_is_NULL(expr) || \
501 __builtin_types_compatible_p(__typeof__(expr), curl_sockopt_callback) || \
502 _curl_callback_compatible((expr), _curl_sockopt_callback1) || \
503 _curl_callback_compatible((expr), _curl_sockopt_callback2))
504typedef int (_curl_sockopt_callback1)(void *, curl_socket_t, curlsocktype);
505typedef int (_curl_sockopt_callback2)(const void *, curl_socket_t,
506 curlsocktype);
507
508/* evaluates to true if expr is of type curl_opensocket_callback or
509 "similar" */
510#define _curl_is_opensocket_cb(expr) \
511 (_curl_is_NULL(expr) || \
512 __builtin_types_compatible_p(__typeof__(expr), curl_opensocket_callback) ||\
513 _curl_callback_compatible((expr), _curl_opensocket_callback1) || \
514 _curl_callback_compatible((expr), _curl_opensocket_callback2) || \
515 _curl_callback_compatible((expr), _curl_opensocket_callback3) || \
516 _curl_callback_compatible((expr), _curl_opensocket_callback4))
517typedef curl_socket_t (_curl_opensocket_callback1)
518 (void *, curlsocktype, struct curl_sockaddr *);
519typedef curl_socket_t (_curl_opensocket_callback2)
520 (void *, curlsocktype, const struct curl_sockaddr *);
521typedef curl_socket_t (_curl_opensocket_callback3)
522 (const void *, curlsocktype, struct curl_sockaddr *);
523typedef curl_socket_t (_curl_opensocket_callback4)
524 (const void *, curlsocktype, const struct curl_sockaddr *);
525
526/* evaluates to true if expr is of type curl_progress_callback or "similar" */
527#define _curl_is_progress_cb(expr) \
528 (_curl_is_NULL(expr) || \
529 __builtin_types_compatible_p(__typeof__(expr), curl_progress_callback) || \
530 _curl_callback_compatible((expr), _curl_progress_callback1) || \
531 _curl_callback_compatible((expr), _curl_progress_callback2))
532typedef int (_curl_progress_callback1)(void *,
533 double, double, double, double);
534typedef int (_curl_progress_callback2)(const void *,
535 double, double, double, double);
536
537/* evaluates to true if expr is of type curl_debug_callback or "similar" */
538#define _curl_is_debug_cb(expr) \
539 (_curl_is_NULL(expr) || \
540 __builtin_types_compatible_p(__typeof__(expr), curl_debug_callback) || \
541 _curl_callback_compatible((expr), _curl_debug_callback1) || \
542 _curl_callback_compatible((expr), _curl_debug_callback2) || \
543 _curl_callback_compatible((expr), _curl_debug_callback3) || \
544 _curl_callback_compatible((expr), _curl_debug_callback4) || \
545 _curl_callback_compatible((expr), _curl_debug_callback5) || \
546 _curl_callback_compatible((expr), _curl_debug_callback6) || \
547 _curl_callback_compatible((expr), _curl_debug_callback7) || \
548 _curl_callback_compatible((expr), _curl_debug_callback8))
549typedef int (_curl_debug_callback1) (CURL *,
550 curl_infotype, char *, size_t, void *);
551typedef int (_curl_debug_callback2) (CURL *,
552 curl_infotype, char *, size_t, const void *);
553typedef int (_curl_debug_callback3) (CURL *,
554 curl_infotype, const char *, size_t, void *);
555typedef int (_curl_debug_callback4) (CURL *,
556 curl_infotype, const char *, size_t, const void *);
557typedef int (_curl_debug_callback5) (CURL *,
558 curl_infotype, unsigned char *, size_t, void *);
559typedef int (_curl_debug_callback6) (CURL *,
560 curl_infotype, unsigned char *, size_t, const void *);
561typedef int (_curl_debug_callback7) (CURL *,
562 curl_infotype, const unsigned char *, size_t, void *);
563typedef int (_curl_debug_callback8) (CURL *,
564 curl_infotype, const unsigned char *, size_t, const void *);
565
566/* evaluates to true if expr is of type curl_ssl_ctx_callback or "similar" */
567/* this is getting even messier... */
568#define _curl_is_ssl_ctx_cb(expr) \
569 (_curl_is_NULL(expr) || \
570 __builtin_types_compatible_p(__typeof__(expr), curl_ssl_ctx_callback) || \
571 _curl_callback_compatible((expr), _curl_ssl_ctx_callback1) || \
572 _curl_callback_compatible((expr), _curl_ssl_ctx_callback2) || \
573 _curl_callback_compatible((expr), _curl_ssl_ctx_callback3) || \
574 _curl_callback_compatible((expr), _curl_ssl_ctx_callback4) || \
575 _curl_callback_compatible((expr), _curl_ssl_ctx_callback5) || \
576 _curl_callback_compatible((expr), _curl_ssl_ctx_callback6) || \
577 _curl_callback_compatible((expr), _curl_ssl_ctx_callback7) || \
578 _curl_callback_compatible((expr), _curl_ssl_ctx_callback8))
579typedef CURLcode (_curl_ssl_ctx_callback1)(CURL *, void *, void *);
580typedef CURLcode (_curl_ssl_ctx_callback2)(CURL *, void *, const void *);
581typedef CURLcode (_curl_ssl_ctx_callback3)(CURL *, const void *, void *);
582typedef CURLcode (_curl_ssl_ctx_callback4)(CURL *, const void *, const void *);
583#ifdef HEADER_SSL_H
584/* hack: if we included OpenSSL's ssl.h, we know about SSL_CTX
585 * this will of course break if we're included before OpenSSL headers...
586 */
587typedef CURLcode (_curl_ssl_ctx_callback5)(CURL *, SSL_CTX, void *);
588typedef CURLcode (_curl_ssl_ctx_callback6)(CURL *, SSL_CTX, const void *);
589typedef CURLcode (_curl_ssl_ctx_callback7)(CURL *, const SSL_CTX, void *);
590typedef CURLcode (_curl_ssl_ctx_callback8)(CURL *, const SSL_CTX,
591 const void *);
592#else
593typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback5;
594typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback6;
595typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback7;
596typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback8;
597#endif
598
599/* evaluates to true if expr is of type curl_conv_callback or "similar" */
600#define _curl_is_conv_cb(expr) \
601 (_curl_is_NULL(expr) || \
602 __builtin_types_compatible_p(__typeof__(expr), curl_conv_callback) || \
603 _curl_callback_compatible((expr), _curl_conv_callback1) || \
604 _curl_callback_compatible((expr), _curl_conv_callback2) || \
605 _curl_callback_compatible((expr), _curl_conv_callback3) || \
606 _curl_callback_compatible((expr), _curl_conv_callback4))
607typedef CURLcode (*_curl_conv_callback1)(char *, size_t length);
608typedef CURLcode (*_curl_conv_callback2)(const char *, size_t length);
609typedef CURLcode (*_curl_conv_callback3)(void *, size_t length);
610typedef CURLcode (*_curl_conv_callback4)(const void *, size_t length);
611
612/* evaluates to true if expr is of type curl_seek_callback or "similar" */
613#define _curl_is_seek_cb(expr) \
614 (_curl_is_NULL(expr) || \
615 __builtin_types_compatible_p(__typeof__(expr), curl_seek_callback) || \
616 _curl_callback_compatible((expr), _curl_seek_callback1) || \
617 _curl_callback_compatible((expr), _curl_seek_callback2))
618typedef CURLcode (*_curl_seek_callback1)(void *, curl_off_t, int);
619typedef CURLcode (*_curl_seek_callback2)(const void *, curl_off_t, int);
620
621
622#endif /* __CURL_TYPECHECK_GCC_H */
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