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thirtyflightsofloving/include/curl/typecheck-gcc.h

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inital commit of full repository
2019-03-13 19:20:07 +00:00
#ifndef __CURL_TYPECHECK_GCC_H
#define __CURL_TYPECHECK_GCC_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
/* wraps curl_easy_setopt() with typechecking */
/* To add a new kind of warning, add an
* if(_curl_is_sometype_option(_curl_opt))
* if(!_curl_is_sometype(value))
* _curl_easy_setopt_err_sometype();
* block and define _curl_is_sometype_option, _curl_is_sometype and
* _curl_easy_setopt_err_sometype below
*
* NOTE: We use two nested 'if' statements here instead of the && operator, in
* order to work around gcc bug #32061. It affects only gcc 4.3.x/4.4.x
* when compiling with -Wlogical-op.
*
* To add an option that uses the same type as an existing option, you'll just
* need to extend the appropriate _curl_*_option macro
*/
#define curl_easy_setopt(handle, option, value) \
__extension__ ({ \
__typeof__(option) _curl_opt = option; \
if(__builtin_constant_p(_curl_opt)) { \
if(_curl_is_long_option(_curl_opt)) \
if(!_curl_is_long(value)) \
_curl_easy_setopt_err_long(); \
if(_curl_is_off_t_option(_curl_opt)) \
if(!_curl_is_off_t(value)) \
_curl_easy_setopt_err_curl_off_t(); \
if(_curl_is_string_option(_curl_opt)) \
if(!_curl_is_string(value)) \
_curl_easy_setopt_err_string(); \
if(_curl_is_write_cb_option(_curl_opt)) \
if(!_curl_is_write_cb(value)) \
_curl_easy_setopt_err_write_callback(); \
if((_curl_opt) == CURLOPT_READFUNCTION) \
if(!_curl_is_read_cb(value)) \
_curl_easy_setopt_err_read_cb(); \
if((_curl_opt) == CURLOPT_IOCTLFUNCTION) \
if(!_curl_is_ioctl_cb(value)) \
_curl_easy_setopt_err_ioctl_cb(); \
if((_curl_opt) == CURLOPT_SOCKOPTFUNCTION) \
if(!_curl_is_sockopt_cb(value)) \
_curl_easy_setopt_err_sockopt_cb(); \
if((_curl_opt) == CURLOPT_OPENSOCKETFUNCTION) \
if(!_curl_is_opensocket_cb(value)) \
_curl_easy_setopt_err_opensocket_cb(); \
if((_curl_opt) == CURLOPT_PROGRESSFUNCTION) \
if(!_curl_is_progress_cb(value)) \
_curl_easy_setopt_err_progress_cb(); \
if((_curl_opt) == CURLOPT_DEBUGFUNCTION) \
if(!_curl_is_debug_cb(value)) \
_curl_easy_setopt_err_debug_cb(); \
if((_curl_opt) == CURLOPT_SSL_CTX_FUNCTION) \
if(!_curl_is_ssl_ctx_cb(value)) \
_curl_easy_setopt_err_ssl_ctx_cb(); \
if(_curl_is_conv_cb_option(_curl_opt)) \
if(!_curl_is_conv_cb(value)) \
_curl_easy_setopt_err_conv_cb(); \
if((_curl_opt) == CURLOPT_SEEKFUNCTION) \
if(!_curl_is_seek_cb(value)) \
_curl_easy_setopt_err_seek_cb(); \
if(_curl_is_cb_data_option(_curl_opt)) \
if(!_curl_is_cb_data(value)) \
_curl_easy_setopt_err_cb_data(); \
if((_curl_opt) == CURLOPT_ERRORBUFFER) \
if(!_curl_is_error_buffer(value)) \
_curl_easy_setopt_err_error_buffer(); \
if((_curl_opt) == CURLOPT_STDERR) \
if(!_curl_is_FILE(value)) \
_curl_easy_setopt_err_FILE(); \
if(_curl_is_postfields_option(_curl_opt)) \
if(!_curl_is_postfields(value)) \
_curl_easy_setopt_err_postfields(); \
if((_curl_opt) == CURLOPT_HTTPPOST) \
if(!_curl_is_arr((value), struct curl_httppost)) \
_curl_easy_setopt_err_curl_httpost(); \
if((_curl_opt) == CURLOPT_MIMEPOST) \
if(!_curl_is_ptr((value), curl_mime)) \
_curl_easy_setopt_err_curl_mimepost(); \
if(_curl_is_slist_option(_curl_opt)) \
if(!_curl_is_arr((value), struct curl_slist)) \
_curl_easy_setopt_err_curl_slist(); \
if((_curl_opt) == CURLOPT_SHARE) \
if(!_curl_is_ptr((value), CURLSH)) \
_curl_easy_setopt_err_CURLSH(); \
} \
curl_easy_setopt(handle, _curl_opt, value); \
})
/* wraps curl_easy_getinfo() with typechecking */
/* FIXME: don't allow const pointers */
#define curl_easy_getinfo(handle, info, arg) \
__extension__ ({ \
__typeof__(info) _curl_info = info; \
if(__builtin_constant_p(_curl_info)) { \
if(_curl_is_string_info(_curl_info)) \
if(!_curl_is_arr((arg), char *)) \
_curl_easy_getinfo_err_string(); \
if(_curl_is_long_info(_curl_info)) \
if(!_curl_is_arr((arg), long)) \
_curl_easy_getinfo_err_long(); \
if(_curl_is_double_info(_curl_info)) \
if(!_curl_is_arr((arg), double)) \
_curl_easy_getinfo_err_double(); \
if(_curl_is_slist_info(_curl_info)) \
if(!_curl_is_arr((arg), struct curl_slist *)) \
_curl_easy_getinfo_err_curl_slist(); \
if(_curl_is_tlssessioninfo_info(_curl_info)) \
if(!_curl_is_arr((arg), struct curl_tlssessioninfo *)) \
_curl_easy_getinfo_err_curl_tlssesssioninfo(); \
if(_curl_is_certinfo_info(_curl_info)) \
if(!_curl_is_arr((arg), struct curl_certinfo *)) \
_curl_easy_getinfo_err_curl_certinfo(); \
if(_curl_is_socket_info(_curl_info)) \
if(!_curl_is_arr((arg), curl_socket_t)) \
_curl_easy_getinfo_err_curl_socket(); \
if(_curl_is_off_t_info(_curl_info)) \
if(!_curl_is_arr((arg), curl_off_t)) \
_curl_easy_getinfo_err_curl_off_t(); \
} \
curl_easy_getinfo(handle, _curl_info, arg); \
})
/* TODO: typechecking for curl_share_setopt() and curl_multi_setopt(),
* for now just make sure that the functions are called with three
* arguments
*/
#define curl_share_setopt(share,opt,param) curl_share_setopt(share,opt,param)
#define curl_multi_setopt(handle,opt,param) curl_multi_setopt(handle,opt,param)
/* the actual warnings, triggered by calling the _curl_easy_setopt_err*
* functions */
/* To define a new warning, use _CURL_WARNING(identifier, "message") */
#define _CURL_WARNING(id, message) \
static void __attribute__((__warning__(message))) \
__attribute__((__unused__)) __attribute__((__noinline__)) \
id(void) { __asm__(""); }
_CURL_WARNING(_curl_easy_setopt_err_long,
"curl_easy_setopt expects a long argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_curl_off_t,
"curl_easy_setopt expects a curl_off_t argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_string,
"curl_easy_setopt expects a "
"string ('char *' or char[]) argument for this option"
)
_CURL_WARNING(_curl_easy_setopt_err_write_callback,
"curl_easy_setopt expects a curl_write_callback argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_read_cb,
"curl_easy_setopt expects a curl_read_callback argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_ioctl_cb,
"curl_easy_setopt expects a curl_ioctl_callback argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_sockopt_cb,
"curl_easy_setopt expects a curl_sockopt_callback argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_opensocket_cb,
"curl_easy_setopt expects a "
"curl_opensocket_callback argument for this option"
)
_CURL_WARNING(_curl_easy_setopt_err_progress_cb,
"curl_easy_setopt expects a curl_progress_callback argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_debug_cb,
"curl_easy_setopt expects a curl_debug_callback argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_ssl_ctx_cb,
"curl_easy_setopt expects a curl_ssl_ctx_callback argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_conv_cb,
"curl_easy_setopt expects a curl_conv_callback argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_seek_cb,
"curl_easy_setopt expects a curl_seek_callback argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_cb_data,
"curl_easy_setopt expects a "
"private data pointer as argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_error_buffer,
"curl_easy_setopt expects a "
"char buffer of CURL_ERROR_SIZE as argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_FILE,
"curl_easy_setopt expects a 'FILE *' argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_postfields,
"curl_easy_setopt expects a 'void *' or 'char *' argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_curl_httpost,
"curl_easy_setopt expects a 'struct curl_httppost *' "
"argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_curl_mimepost,
"curl_easy_setopt expects a 'curl_mime *' "
"argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_curl_slist,
"curl_easy_setopt expects a 'struct curl_slist *' argument for this option")
_CURL_WARNING(_curl_easy_setopt_err_CURLSH,
"curl_easy_setopt expects a CURLSH* argument for this option")
_CURL_WARNING(_curl_easy_getinfo_err_string,
"curl_easy_getinfo expects a pointer to 'char *' for this info")
_CURL_WARNING(_curl_easy_getinfo_err_long,
"curl_easy_getinfo expects a pointer to long for this info")
_CURL_WARNING(_curl_easy_getinfo_err_double,
"curl_easy_getinfo expects a pointer to double for this info")
_CURL_WARNING(_curl_easy_getinfo_err_curl_slist,
"curl_easy_getinfo expects a pointer to 'struct curl_slist *' for this info")
_CURL_WARNING(_curl_easy_getinfo_err_curl_tlssesssioninfo,
"curl_easy_getinfo expects a pointer to "
"'struct curl_tlssessioninfo *' for this info")
_CURL_WARNING(_curl_easy_getinfo_err_curl_certinfo,
"curl_easy_getinfo expects a pointer to "
"'struct curl_certinfo *' for this info")
_CURL_WARNING(_curl_easy_getinfo_err_curl_socket,
"curl_easy_getinfo expects a pointer to curl_socket_t for this info")
_CURL_WARNING(_curl_easy_getinfo_err_curl_off_t,
"curl_easy_getinfo expects a pointer to curl_off_t for this info")
/* groups of curl_easy_setops options that take the same type of argument */
/* To add a new option to one of the groups, just add
* (option) == CURLOPT_SOMETHING
* to the or-expression. If the option takes a long or curl_off_t, you don't
* have to do anything
*/
/* evaluates to true if option takes a long argument */
#define _curl_is_long_option(option) \
(0 < (option) && (option) < CURLOPTTYPE_OBJECTPOINT)
#define _curl_is_off_t_option(option) \
((option) > CURLOPTTYPE_OFF_T)
/* evaluates to true if option takes a char* argument */
#define _curl_is_string_option(option) \
((option) == CURLOPT_ABSTRACT_UNIX_SOCKET || \
(option) == CURLOPT_ACCEPT_ENCODING || \
(option) == CURLOPT_CAINFO || \
(option) == CURLOPT_CAPATH || \
(option) == CURLOPT_COOKIE || \
(option) == CURLOPT_COOKIEFILE || \
(option) == CURLOPT_COOKIEJAR || \
(option) == CURLOPT_COOKIELIST || \
(option) == CURLOPT_CRLFILE || \
(option) == CURLOPT_CUSTOMREQUEST || \
(option) == CURLOPT_DEFAULT_PROTOCOL || \
(option) == CURLOPT_DNS_INTERFACE || \
(option) == CURLOPT_DNS_LOCAL_IP4 || \
(option) == CURLOPT_DNS_LOCAL_IP6 || \
(option) == CURLOPT_DNS_SERVERS || \
(option) == CURLOPT_EGDSOCKET || \
(option) == CURLOPT_FTPPORT || \
(option) == CURLOPT_FTP_ACCOUNT || \
(option) == CURLOPT_FTP_ALTERNATIVE_TO_USER || \
(option) == CURLOPT_INTERFACE || \
(option) == CURLOPT_ISSUERCERT || \
(option) == CURLOPT_KEYPASSWD || \
(option) == CURLOPT_KRBLEVEL || \
(option) == CURLOPT_LOGIN_OPTIONS || \
(option) == CURLOPT_MAIL_AUTH || \
(option) == CURLOPT_MAIL_FROM || \
(option) == CURLOPT_NETRC_FILE || \
(option) == CURLOPT_NOPROXY || \
(option) == CURLOPT_PASSWORD || \
(option) == CURLOPT_PINNEDPUBLICKEY || \
(option) == CURLOPT_PRE_PROXY || \
(option) == CURLOPT_PROXY || \
(option) == CURLOPT_PROXYPASSWORD || \
(option) == CURLOPT_PROXYUSERNAME || \
(option) == CURLOPT_PROXYUSERPWD || \
(option) == CURLOPT_PROXY_CAINFO || \
(option) == CURLOPT_PROXY_CAPATH || \
(option) == CURLOPT_PROXY_CRLFILE || \
(option) == CURLOPT_PROXY_KEYPASSWD || \
(option) == CURLOPT_PROXY_PINNEDPUBLICKEY || \
(option) == CURLOPT_PROXY_SERVICE_NAME || \
(option) == CURLOPT_PROXY_SSLCERT || \
(option) == CURLOPT_PROXY_SSLCERTTYPE || \
(option) == CURLOPT_PROXY_SSLKEY || \
(option) == CURLOPT_PROXY_SSLKEYTYPE || \
(option) == CURLOPT_PROXY_SSL_CIPHER_LIST || \
(option) == CURLOPT_PROXY_TLSAUTH_PASSWORD || \
(option) == CURLOPT_PROXY_TLSAUTH_USERNAME || \
(option) == CURLOPT_PROXY_TLSAUTH_TYPE || \
(option) == CURLOPT_RANDOM_FILE || \
(option) == CURLOPT_RANGE || \
(option) == CURLOPT_REFERER || \
(option) == CURLOPT_RTSP_SESSION_ID || \
(option) == CURLOPT_RTSP_STREAM_URI || \
(option) == CURLOPT_RTSP_TRANSPORT || \
(option) == CURLOPT_SERVICE_NAME || \
(option) == CURLOPT_SOCKS5_GSSAPI_SERVICE || \
(option) == CURLOPT_SSH_HOST_PUBLIC_KEY_MD5 || \
(option) == CURLOPT_SSH_KNOWNHOSTS || \
(option) == CURLOPT_SSH_PRIVATE_KEYFILE || \
(option) == CURLOPT_SSH_PUBLIC_KEYFILE || \
(option) == CURLOPT_SSLCERT || \
(option) == CURLOPT_SSLCERTTYPE || \
(option) == CURLOPT_SSLENGINE || \
(option) == CURLOPT_SSLKEY || \
(option) == CURLOPT_SSLKEYTYPE || \
(option) == CURLOPT_SSL_CIPHER_LIST || \
(option) == CURLOPT_TLSAUTH_PASSWORD || \
(option) == CURLOPT_TLSAUTH_TYPE || \
(option) == CURLOPT_TLSAUTH_USERNAME || \
(option) == CURLOPT_UNIX_SOCKET_PATH || \
(option) == CURLOPT_URL || \
(option) == CURLOPT_USERAGENT || \
(option) == CURLOPT_USERNAME || \
(option) == CURLOPT_USERPWD || \
(option) == CURLOPT_XOAUTH2_BEARER || \
0)
/* evaluates to true if option takes a curl_write_callback argument */
#define _curl_is_write_cb_option(option) \
((option) == CURLOPT_HEADERFUNCTION || \
(option) == CURLOPT_WRITEFUNCTION)
/* evaluates to true if option takes a curl_conv_callback argument */
#define _curl_is_conv_cb_option(option) \
((option) == CURLOPT_CONV_TO_NETWORK_FUNCTION || \
(option) == CURLOPT_CONV_FROM_NETWORK_FUNCTION || \
(option) == CURLOPT_CONV_FROM_UTF8_FUNCTION)
/* evaluates to true if option takes a data argument to pass to a callback */
#define _curl_is_cb_data_option(option) \
((option) == CURLOPT_CHUNK_DATA || \
(option) == CURLOPT_CLOSESOCKETDATA || \
(option) == CURLOPT_DEBUGDATA || \
(option) == CURLOPT_FNMATCH_DATA || \
(option) == CURLOPT_HEADERDATA || \
(option) == CURLOPT_INTERLEAVEDATA || \
(option) == CURLOPT_IOCTLDATA || \
(option) == CURLOPT_OPENSOCKETDATA || \
(option) == CURLOPT_PRIVATE || \
(option) == CURLOPT_PROGRESSDATA || \
(option) == CURLOPT_READDATA || \
(option) == CURLOPT_SEEKDATA || \
(option) == CURLOPT_SOCKOPTDATA || \
(option) == CURLOPT_SSH_KEYDATA || \
(option) == CURLOPT_SSL_CTX_DATA || \
(option) == CURLOPT_WRITEDATA || \
0)
/* evaluates to true if option takes a POST data argument (void* or char*) */
#define _curl_is_postfields_option(option) \
((option) == CURLOPT_POSTFIELDS || \
(option) == CURLOPT_COPYPOSTFIELDS || \
0)
/* evaluates to true if option takes a struct curl_slist * argument */
#define _curl_is_slist_option(option) \
((option) == CURLOPT_HTTP200ALIASES || \
(option) == CURLOPT_HTTPHEADER || \
(option) == CURLOPT_MAIL_RCPT || \
(option) == CURLOPT_POSTQUOTE || \
(option) == CURLOPT_PREQUOTE || \
(option) == CURLOPT_PROXYHEADER || \
(option) == CURLOPT_QUOTE || \
(option) == CURLOPT_RESOLVE || \
(option) == CURLOPT_TELNETOPTIONS || \
0)
/* groups of curl_easy_getinfo infos that take the same type of argument */
/* evaluates to true if info expects a pointer to char * argument */
#define _curl_is_string_info(info) \
(CURLINFO_STRING < (info) && (info) < CURLINFO_LONG)
/* evaluates to true if info expects a pointer to long argument */
#define _curl_is_long_info(info) \
(CURLINFO_LONG < (info) && (info) < CURLINFO_DOUBLE)
/* evaluates to true if info expects a pointer to double argument */
#define _curl_is_double_info(info) \
(CURLINFO_DOUBLE < (info) && (info) < CURLINFO_SLIST)
/* true if info expects a pointer to struct curl_slist * argument */
#define _curl_is_slist_info(info) \
(((info) == CURLINFO_SSL_ENGINES) || ((info) == CURLINFO_COOKIELIST))
/* true if info expects a pointer to struct curl_tlssessioninfo * argument */
#define _curl_is_tlssessioninfo_info(info) \
(((info) == CURLINFO_TLS_SSL_PTR) || ((info) == CURLINFO_TLS_SESSION))
/* true if info expects a pointer to struct curl_certinfo * argument */
#define _curl_is_certinfo_info(info) ((info) == CURLINFO_CERTINFO)
/* true if info expects a pointer to struct curl_socket_t argument */
#define _curl_is_socket_info(info) \
(CURLINFO_SOCKET < (info) && (info) < CURLINFO_OFF_T)
/* true if info expects a pointer to curl_off_t argument */
#define _curl_is_off_t_info(info) \
(CURLINFO_OFF_T < (info))
/* typecheck helpers -- check whether given expression has requested type*/
/* For pointers, you can use the _curl_is_ptr/_curl_is_arr macros,
* otherwise define a new macro. Search for __builtin_types_compatible_p
* in the GCC manual.
* NOTE: these macros MUST NOT EVALUATE their arguments! The argument is
* the actual expression passed to the curl_easy_setopt macro. This
* means that you can only apply the sizeof and __typeof__ operators, no
* == or whatsoever.
*/
/* XXX: should evaluate to true iff expr is a pointer */
#define _curl_is_any_ptr(expr) \
(sizeof(expr) == sizeof(void *))
/* evaluates to true if expr is NULL */
/* XXX: must not evaluate expr, so this check is not accurate */
#define _curl_is_NULL(expr) \
(__builtin_types_compatible_p(__typeof__(expr), __typeof__(NULL)))
/* evaluates to true if expr is type*, const type* or NULL */
#define _curl_is_ptr(expr, type) \
(_curl_is_NULL(expr) || \
__builtin_types_compatible_p(__typeof__(expr), type *) || \
__builtin_types_compatible_p(__typeof__(expr), const type *))
/* evaluates to true if expr is one of type[], type*, NULL or const type* */
#define _curl_is_arr(expr, type) \
(_curl_is_ptr((expr), type) || \
__builtin_types_compatible_p(__typeof__(expr), type []))
/* evaluates to true if expr is a string */
#define _curl_is_string(expr) \
(_curl_is_arr((expr), char) || \
_curl_is_arr((expr), signed char) || \
_curl_is_arr((expr), unsigned char))
/* evaluates to true if expr is a long (no matter the signedness)
* XXX: for now, int is also accepted (and therefore short and char, which
* are promoted to int when passed to a variadic function) */
#define _curl_is_long(expr) \
(__builtin_types_compatible_p(__typeof__(expr), long) || \
__builtin_types_compatible_p(__typeof__(expr), signed long) || \
__builtin_types_compatible_p(__typeof__(expr), unsigned long) || \
__builtin_types_compatible_p(__typeof__(expr), int) || \
__builtin_types_compatible_p(__typeof__(expr), signed int) || \
__builtin_types_compatible_p(__typeof__(expr), unsigned int) || \
__builtin_types_compatible_p(__typeof__(expr), short) || \
__builtin_types_compatible_p(__typeof__(expr), signed short) || \
__builtin_types_compatible_p(__typeof__(expr), unsigned short) || \
__builtin_types_compatible_p(__typeof__(expr), char) || \
__builtin_types_compatible_p(__typeof__(expr), signed char) || \
__builtin_types_compatible_p(__typeof__(expr), unsigned char))
/* evaluates to true if expr is of type curl_off_t */
#define _curl_is_off_t(expr) \
(__builtin_types_compatible_p(__typeof__(expr), curl_off_t))
/* evaluates to true if expr is abuffer suitable for CURLOPT_ERRORBUFFER */
/* XXX: also check size of an char[] array? */
#define _curl_is_error_buffer(expr) \
(_curl_is_NULL(expr) || \
__builtin_types_compatible_p(__typeof__(expr), char *) || \
__builtin_types_compatible_p(__typeof__(expr), char[]))
/* evaluates to true if expr is of type (const) void* or (const) FILE* */
#if 0
#define _curl_is_cb_data(expr) \
(_curl_is_ptr((expr), void) || \
_curl_is_ptr((expr), FILE))
#else /* be less strict */
#define _curl_is_cb_data(expr) \
_curl_is_any_ptr(expr)
#endif
/* evaluates to true if expr is of type FILE* */
#define _curl_is_FILE(expr) \
(_curl_is_NULL(expr) || \
(__builtin_types_compatible_p(__typeof__(expr), FILE *)))
/* evaluates to true if expr can be passed as POST data (void* or char*) */
#define _curl_is_postfields(expr) \
(_curl_is_ptr((expr), void) || \
_curl_is_arr((expr), char))
/* FIXME: the whole callback checking is messy...
* The idea is to tolerate char vs. void and const vs. not const
* pointers in arguments at least
*/
/* helper: __builtin_types_compatible_p distinguishes between functions and
* function pointers, hide it */
#define _curl_callback_compatible(func, type) \
(__builtin_types_compatible_p(__typeof__(func), type) || \
__builtin_types_compatible_p(__typeof__(func) *, type))
/* evaluates to true if expr is of type curl_read_callback or "similar" */
#define _curl_is_read_cb(expr) \
(_curl_is_NULL(expr) || \
_curl_callback_compatible((expr), __typeof__(fread) *) || \
_curl_callback_compatible((expr), curl_read_callback) || \
_curl_callback_compatible((expr), _curl_read_callback1) || \
_curl_callback_compatible((expr), _curl_read_callback2) || \
_curl_callback_compatible((expr), _curl_read_callback3) || \
_curl_callback_compatible((expr), _curl_read_callback4) || \
_curl_callback_compatible((expr), _curl_read_callback5) || \
_curl_callback_compatible((expr), _curl_read_callback6))
typedef size_t (*_curl_read_callback1)(char *, size_t, size_t, void *);
typedef size_t (*_curl_read_callback2)(char *, size_t, size_t, const void *);
typedef size_t (*_curl_read_callback3)(char *, size_t, size_t, FILE *);
typedef size_t (*_curl_read_callback4)(void *, size_t, size_t, void *);
typedef size_t (*_curl_read_callback5)(void *, size_t, size_t, const void *);
typedef size_t (*_curl_read_callback6)(void *, size_t, size_t, FILE *);
/* evaluates to true if expr is of type curl_write_callback or "similar" */
#define _curl_is_write_cb(expr) \
(_curl_is_read_cb(expr) || \
_curl_callback_compatible((expr), __typeof__(fwrite) *) || \
_curl_callback_compatible((expr), curl_write_callback) || \
_curl_callback_compatible((expr), _curl_write_callback1) || \
_curl_callback_compatible((expr), _curl_write_callback2) || \
_curl_callback_compatible((expr), _curl_write_callback3) || \
_curl_callback_compatible((expr), _curl_write_callback4) || \
_curl_callback_compatible((expr), _curl_write_callback5) || \
_curl_callback_compatible((expr), _curl_write_callback6))
typedef size_t (*_curl_write_callback1)(const char *, size_t, size_t, void *);
typedef size_t (*_curl_write_callback2)(const char *, size_t, size_t,
const void *);
typedef size_t (*_curl_write_callback3)(const char *, size_t, size_t, FILE *);
typedef size_t (*_curl_write_callback4)(const void *, size_t, size_t, void *);
typedef size_t (*_curl_write_callback5)(const void *, size_t, size_t,
const void *);
typedef size_t (*_curl_write_callback6)(const void *, size_t, size_t, FILE *);
/* evaluates to true if expr is of type curl_ioctl_callback or "similar" */
#define _curl_is_ioctl_cb(expr) \
(_curl_is_NULL(expr) || \
_curl_callback_compatible((expr), curl_ioctl_callback) || \
_curl_callback_compatible((expr), _curl_ioctl_callback1) || \
_curl_callback_compatible((expr), _curl_ioctl_callback2) || \
_curl_callback_compatible((expr), _curl_ioctl_callback3) || \
_curl_callback_compatible((expr), _curl_ioctl_callback4))
typedef curlioerr (*_curl_ioctl_callback1)(CURL *, int, void *);
typedef curlioerr (*_curl_ioctl_callback2)(CURL *, int, const void *);
typedef curlioerr (*_curl_ioctl_callback3)(CURL *, curliocmd, void *);
typedef curlioerr (*_curl_ioctl_callback4)(CURL *, curliocmd, const void *);
/* evaluates to true if expr is of type curl_sockopt_callback or "similar" */
#define _curl_is_sockopt_cb(expr) \
(_curl_is_NULL(expr) || \
_curl_callback_compatible((expr), curl_sockopt_callback) || \
_curl_callback_compatible((expr), _curl_sockopt_callback1) || \
_curl_callback_compatible((expr), _curl_sockopt_callback2))
typedef int (*_curl_sockopt_callback1)(void *, curl_socket_t, curlsocktype);
typedef int (*_curl_sockopt_callback2)(const void *, curl_socket_t,
curlsocktype);
/* evaluates to true if expr is of type curl_opensocket_callback or
"similar" */
#define _curl_is_opensocket_cb(expr) \
(_curl_is_NULL(expr) || \
_curl_callback_compatible((expr), curl_opensocket_callback) || \
_curl_callback_compatible((expr), _curl_opensocket_callback1) || \
_curl_callback_compatible((expr), _curl_opensocket_callback2) || \
_curl_callback_compatible((expr), _curl_opensocket_callback3) || \
_curl_callback_compatible((expr), _curl_opensocket_callback4))
typedef curl_socket_t (*_curl_opensocket_callback1)
(void *, curlsocktype, struct curl_sockaddr *);
typedef curl_socket_t (*_curl_opensocket_callback2)
(void *, curlsocktype, const struct curl_sockaddr *);
typedef curl_socket_t (*_curl_opensocket_callback3)
(const void *, curlsocktype, struct curl_sockaddr *);
typedef curl_socket_t (*_curl_opensocket_callback4)
(const void *, curlsocktype, const struct curl_sockaddr *);
/* evaluates to true if expr is of type curl_progress_callback or "similar" */
#define _curl_is_progress_cb(expr) \
(_curl_is_NULL(expr) || \
_curl_callback_compatible((expr), curl_progress_callback) || \
_curl_callback_compatible((expr), _curl_progress_callback1) || \
_curl_callback_compatible((expr), _curl_progress_callback2))
typedef int (*_curl_progress_callback1)(void *,
double, double, double, double);
typedef int (*_curl_progress_callback2)(const void *,
double, double, double, double);
/* evaluates to true if expr is of type curl_debug_callback or "similar" */
#define _curl_is_debug_cb(expr) \
(_curl_is_NULL(expr) || \
_curl_callback_compatible((expr), curl_debug_callback) || \
_curl_callback_compatible((expr), _curl_debug_callback1) || \
_curl_callback_compatible((expr), _curl_debug_callback2) || \
_curl_callback_compatible((expr), _curl_debug_callback3) || \
_curl_callback_compatible((expr), _curl_debug_callback4) || \
_curl_callback_compatible((expr), _curl_debug_callback5) || \
_curl_callback_compatible((expr), _curl_debug_callback6) || \
_curl_callback_compatible((expr), _curl_debug_callback7) || \
_curl_callback_compatible((expr), _curl_debug_callback8))
typedef int (*_curl_debug_callback1) (CURL *,
curl_infotype, char *, size_t, void *);
typedef int (*_curl_debug_callback2) (CURL *,
curl_infotype, char *, size_t, const void *);
typedef int (*_curl_debug_callback3) (CURL *,
curl_infotype, const char *, size_t, void *);
typedef int (*_curl_debug_callback4) (CURL *,
curl_infotype, const char *, size_t, const void *);
typedef int (*_curl_debug_callback5) (CURL *,
curl_infotype, unsigned char *, size_t, void *);
typedef int (*_curl_debug_callback6) (CURL *,
curl_infotype, unsigned char *, size_t, const void *);
typedef int (*_curl_debug_callback7) (CURL *,
curl_infotype, const unsigned char *, size_t, void *);
typedef int (*_curl_debug_callback8) (CURL *,
curl_infotype, const unsigned char *, size_t, const void *);
/* evaluates to true if expr is of type curl_ssl_ctx_callback or "similar" */
/* this is getting even messier... */
#define _curl_is_ssl_ctx_cb(expr) \
(_curl_is_NULL(expr) || \
_curl_callback_compatible((expr), curl_ssl_ctx_callback) || \
_curl_callback_compatible((expr), _curl_ssl_ctx_callback1) || \
_curl_callback_compatible((expr), _curl_ssl_ctx_callback2) || \
_curl_callback_compatible((expr), _curl_ssl_ctx_callback3) || \
_curl_callback_compatible((expr), _curl_ssl_ctx_callback4) || \
_curl_callback_compatible((expr), _curl_ssl_ctx_callback5) || \
_curl_callback_compatible((expr), _curl_ssl_ctx_callback6) || \
_curl_callback_compatible((expr), _curl_ssl_ctx_callback7) || \
_curl_callback_compatible((expr), _curl_ssl_ctx_callback8))
typedef CURLcode (*_curl_ssl_ctx_callback1)(CURL *, void *, void *);
typedef CURLcode (*_curl_ssl_ctx_callback2)(CURL *, void *, const void *);
typedef CURLcode (*_curl_ssl_ctx_callback3)(CURL *, const void *, void *);
typedef CURLcode (*_curl_ssl_ctx_callback4)(CURL *, const void *,
const void *);
#ifdef HEADER_SSL_H
/* hack: if we included OpenSSL's ssl.h, we know about SSL_CTX
* this will of course break if we're included before OpenSSL headers...
*/
typedef CURLcode (*_curl_ssl_ctx_callback5)(CURL *, SSL_CTX, void *);
typedef CURLcode (*_curl_ssl_ctx_callback6)(CURL *, SSL_CTX, const void *);
typedef CURLcode (*_curl_ssl_ctx_callback7)(CURL *, const SSL_CTX, void *);
typedef CURLcode (*_curl_ssl_ctx_callback8)(CURL *, const SSL_CTX,
const void *);
#else
typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback5;
typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback6;
typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback7;
typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback8;
#endif
/* evaluates to true if expr is of type curl_conv_callback or "similar" */
#define _curl_is_conv_cb(expr) \
(_curl_is_NULL(expr) || \
_curl_callback_compatible((expr), curl_conv_callback) || \
_curl_callback_compatible((expr), _curl_conv_callback1) || \
_curl_callback_compatible((expr), _curl_conv_callback2) || \
_curl_callback_compatible((expr), _curl_conv_callback3) || \
_curl_callback_compatible((expr), _curl_conv_callback4))
typedef CURLcode (*_curl_conv_callback1)(char *, size_t length);
typedef CURLcode (*_curl_conv_callback2)(const char *, size_t length);
typedef CURLcode (*_curl_conv_callback3)(void *, size_t length);
typedef CURLcode (*_curl_conv_callback4)(const void *, size_t length);
/* evaluates to true if expr is of type curl_seek_callback or "similar" */
#define _curl_is_seek_cb(expr) \
(_curl_is_NULL(expr) || \
_curl_callback_compatible((expr), curl_seek_callback) || \
_curl_callback_compatible((expr), _curl_seek_callback1) || \
_curl_callback_compatible((expr), _curl_seek_callback2))
typedef CURLcode (*_curl_seek_callback1)(void *, curl_off_t, int);
typedef CURLcode (*_curl_seek_callback2)(const void *, curl_off_t, int);
#endif /* __CURL_TYPECHECK_GCC_H */
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