mirror of https://github.com/c-ares/c-ares.git
Brad House
5 months ago
parent
94b69fbd45
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adc6659486
7 changed files with 48 additions and 207 deletions
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/* MIT License
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* |
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* Copyright (c) 2009 Daniel Stenberg |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice (including the next |
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* paragraph) shall be included in all copies or substantial portions of the |
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* Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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* |
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* SPDX-License-Identifier: MIT |
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*/ |
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#ifndef __CARES_RULES_H |
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#define __CARES_RULES_H |
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/* ================================================================ */ |
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/* COMPILE TIME SANITY CHECKS */ |
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/* ================================================================ */ |
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/*
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* NOTE 1: |
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* ------- |
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* |
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* All checks done in this file are intentionally placed in a public |
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* header file which is pulled by ares.h when an application is |
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* being built using an already built c-ares library. Additionally |
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* this file is also included and used when building the library. |
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* |
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* If compilation fails on this file it is certainly sure that the |
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* problem is elsewhere. It could be a problem in the ares_build.h |
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* header file, or simply that you are using different compilation |
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* settings than those used to build the library. |
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* |
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* Nothing in this file is intended to be modified or adjusted by the |
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* c-ares library user nor by the c-ares library builder. |
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* |
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* Do not deactivate any check, these are done to make sure that the |
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* library is properly built and used. |
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* |
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* You can find further help on the c-ares development mailing list: |
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* http://lists.haxx.se/listinfo/c-ares/
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* |
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* NOTE 2 |
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* ------ |
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* |
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* Some of the following compile time checks are based on the fact |
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* that the dimension of a constant array can not be a negative one. |
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* In this way if the compile time verification fails, the compilation |
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* will fail issuing an error. The error description wording is compiler |
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* dependent but it will be quite similar to one of the following: |
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* |
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* "negative subscript or subscript is too large" |
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* "array must have at least one element" |
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* "-1 is an illegal array size" |
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* "size of array is negative" |
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* |
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* If you are building an application which tries to use an already |
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* built c-ares library and you are getting this kind of errors on |
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* this file, it is a clear indication that there is a mismatch between |
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* how the library was built and how you are trying to use it for your |
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* application. Your already compiled or binary library provider is the |
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* only one who can give you the details you need to properly use it. |
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*/ |
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/*
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* Verify that some macros are actually defined. |
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*/ |
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#ifndef CARES_TYPEOF_ARES_SOCKLEN_T |
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# error "CARES_TYPEOF_ARES_SOCKLEN_T definition is missing!" |
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Error Compilation_aborted_CARES_TYPEOF_ARES_SOCKLEN_T_is_missing |
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#endif |
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/*
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* Macros private to this header file. |
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*/ |
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#define CareschkszEQ(t, s) sizeof(t) == s ? 1 : -1 |
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#define CareschkszGE(t1, t2) sizeof(t1) >= sizeof(t2) ? 1 : -1 |
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/*
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* Verify that the size previously defined and expected for |
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* ares_socklen_t is actually the same as the one reported |
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* by sizeof() at compile time. |
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*/ |
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typedef char __cares_rule_02__[CareschkszEQ( |
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ares_socklen_t, sizeof(CARES_TYPEOF_ARES_SOCKLEN_T))]; |
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/*
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* Verify at compile time that the size of ares_socklen_t as reported |
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* by sizeof() is greater or equal than the one reported for int for |
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* the current compilation. |
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*/ |
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typedef char __cares_rule_03__[CareschkszGE(ares_socklen_t, int)]; |
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/* ================================================================ */ |
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/* EXTERNALLY AND INTERNALLY VISIBLE DEFINITIONS */ |
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/* ================================================================ */ |
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/*
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* Get rid of macros private to this header file. |
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*/ |
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#undef CareschkszEQ |
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#undef CareschkszGE |
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/*
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* Get rid of macros not intended to exist beyond this point. |
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*/ |
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#undef CARES_PULL_WS2TCPIP_H |
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#undef CARES_PULL_SYS_TYPES_H |
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#undef CARES_PULL_SYS_SOCKET_H |
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#undef CARES_TYPEOF_ARES_SOCKLEN_T |
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#endif /* __CARES_RULES_H */ |
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