/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */

/*

 * Copyright (c) 1993, 1994, 1995, 1996, 1997

 *	The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *	This product includes software developed by the Computer Systems

 *	Engineering Group at Lawrence Berkeley Laboratory.

 * 4. Neither the name of the University nor of the Laboratory may be used

 *    to endorse or promote products derived from this software without

 *    specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

#ifndef _diag_control_h

#define _diag_control_h

#include "pcap/compiler-tests.h"

#ifndef _MSC_VER

  /*

   * Clang and GCC both support this way of putting pragmas into #defines.

   * We don't use it unless we have a compiler that supports it; the

   * warning-suppressing pragmas differ between Clang and GCC, so we test

   * for both of those separately.

   */

  #define PCAP_DO_PRAGMA(x) _Pragma (#x)

#endif

/*

 * Suppress Flex warnings.

 */

#if defined(_MSC_VER)

  /*

   * This is Microsoft Visual Studio; we can use __pragma(warning(disable:XXXX))

   * and __pragma(warning(push/pop)).

   *

   * Suppress signed-vs-unsigned comparison, narrowing, and unreachable

   * code warnings.

   */

  #define DIAG_OFF_FLEX \

    __pragma(warning(push)) \

    __pragma(warning(disable:4127)) \

    __pragma(warning(disable:4242)) \

    __pragma(warning(disable:4244)) \

    __pragma(warning(disable:4702))

  #define DIAG_ON_FLEX  __pragma(warning(pop))

#elif PCAP_IS_AT_LEAST_CLANG_VERSION(2,8)

  /*

   * This is Clang 2.8 or later; we can use "clang diagnostic

   * ignored -Wxxx" and "clang diagnostic push/pop".

   *

   * Suppress -Wdocumentation warnings; GCC doesn't support -Wdocumentation,

   * at least according to the GCC 7.3 documentation.  Apparently, Flex

   * generates code that upsets at least some versions of Clang's

   * -Wdocumentation.

   */

  #define DIAG_OFF_FLEX \

    PCAP_DO_PRAGMA(clang diagnostic push) \

    PCAP_DO_PRAGMA(clang diagnostic ignored "-Wsign-compare") \

    PCAP_DO_PRAGMA(clang diagnostic ignored "-Wdocumentation") \

    PCAP_DO_PRAGMA(clang diagnostic ignored "-Wmissing-noreturn") \

    PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunused-parameter") \

    PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunreachable-code")

  #define DIAG_ON_FLEX \

    PCAP_DO_PRAGMA(clang diagnostic pop)

#elif PCAP_IS_AT_LEAST_GNUC_VERSION(4,6)

  /*

   * This is GCC 4.6 or later, or a compiler claiming to be that.

   * We can use "GCC diagnostic ignored -Wxxx" (introduced in 4.2)

   * and "GCC diagnostic push/pop" (introduced in 4.6).

   */

  #define DIAG_OFF_FLEX \

    PCAP_DO_PRAGMA(GCC diagnostic push) \

    PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wsign-compare") \

    PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunused-parameter") \

    PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunreachable-code")

  #define DIAG_ON_FLEX \

    PCAP_DO_PRAGMA(GCC diagnostic pop)

#else

  /*

   * Neither Visual Studio, nor Clang 2.8 or later, nor GCC 4.6 or later

   * or a compiler claiming to be that; there's nothing we know of that

   * we can do.

   */

  #define DIAG_OFF_FLEX

  #define DIAG_ON_FLEX

#endif

#ifdef YYBYACC

  /*

   * Berkeley YACC.

   *

   * It generates a global declaration of yylval, or the appropriately

   * prefixed version of yylval, in grammar.h, *even though it's been

   * told to generate a pure parser, meaning it doesn't have any global

   * variables*.  Bison doesn't do this.

   *

   * That causes a warning due to the local declaration in the parser

   * shadowing the global declaration.

   *

   * So, if the compiler warns about that, we turn off -Wshadow warnings.

   *

   * In addition, the generated code may have functions with unreachable

   * code, so suppress warnings about those.

   */

  #if defined(_MSC_VER)

    /*

     * This is Microsoft Visual Studio; we can use

     * __pragma(warning(disable:XXXX)) and __pragma(warning(push/pop)).

     */

    #define DIAG_OFF_BISON_BYACC \

      __pragma(warning(push)) \

      __pragma(warning(disable:4702))

    #define DIAG_ON_BISON_BYACC  __pragma(warning(pop))

  #elif PCAP_IS_AT_LEAST_CLANG_VERSION(2,8)

    /*

     * This is Clang 2.8 or later; we can use "clang diagnostic

     * ignored -Wxxx" and "clang diagnostic push/pop".

     */

    #define DIAG_OFF_BISON_BYACC \

      PCAP_DO_PRAGMA(clang diagnostic push) \

      PCAP_DO_PRAGMA(clang diagnostic ignored "-Wshadow") \

      PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunreachable-code")

    #define DIAG_ON_BISON_BYACC \

      PCAP_DO_PRAGMA(clang diagnostic pop)

  #elif PCAP_IS_AT_LEAST_GNUC_VERSION(4,6)

    /*

     * This is GCC 4.6 or later, or a compiler claiming to be that.

     * We can use "GCC diagnostic ignored -Wxxx" (introduced in 4.2)

     * and "GCC diagnostic push/pop" (introduced in 4.6).

     */

    #define DIAG_OFF_BISON_BYACC \

      PCAP_DO_PRAGMA(GCC diagnostic push) \

      PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wshadow") \

      PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunreachable-code")

    #define DIAG_ON_BISON_BYACC \

      PCAP_DO_PRAGMA(GCC diagnostic pop)

  #else

    /*

     * Neither Clang 2.8 or later nor GCC 4.6 or later or a compiler

     * claiming to be that; there's nothing we know of that we can do.

     */

    #define DIAG_OFF_BISON_BYACC

    #define DIAG_ON_BISON_BYACC

  #endif

#else

  /*

   * Bison.

   *

   * The generated code may have functions with unreachable code, so

   * suppress warnings about those.

   */

  #if defined(_MSC_VER)

    /*

     * This is Microsoft Visual Studio; we can use

     * __pragma(warning(disable:XXXX)) and __pragma(warning(push/pop)).

     *

     * Suppress some /Wall warnings.

     */

    #define DIAG_OFF_BISON_BYACC \

      __pragma(warning(push)) \

      __pragma(warning(disable:4127)) \

      __pragma(warning(disable:4242)) \

      __pragma(warning(disable:4244)) \

      __pragma(warning(disable:4702))

    #define DIAG_ON_BISON_BYACC  __pragma(warning(pop))

  #elif PCAP_IS_AT_LEAST_CLANG_VERSION(2,8)

    /*

     * This is Clang 2.8 or later; we can use "clang diagnostic

     * ignored -Wxxx" and "clang diagnostic push/pop".

     */

    #define DIAG_OFF_BISON_BYACC \

      PCAP_DO_PRAGMA(clang diagnostic push) \

      PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunreachable-code")

    #define DIAG_ON_BISON_BYACC \

      PCAP_DO_PRAGMA(clang diagnostic pop)

  #elif PCAP_IS_AT_LEAST_GNUC_VERSION(4,6)

    /*

     * This is GCC 4.6 or later, or a compiler claiming to be that.

     * We can use "GCC diagnostic ignored -Wxxx" (introduced in 4.2)

     * and "GCC diagnostic push/pop" (introduced in 4.6).

     */

    #define DIAG_OFF_BISON_BYACC \

      PCAP_DO_PRAGMA(GCC diagnostic push) \

      PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunreachable-code")

    #define DIAG_ON_BISON_BYACC \

      PCAP_DO_PRAGMA(GCC diagnostic pop)

  #else

    /*

     * Neither Clang 2.8 or later nor GCC 4.6 or later or a compiler

     * claiming to be that; there's nothing we know of that we can do.

     */

    #define DIAG_OFF_BISON_BYACC

    #define DIAG_ON_BISON_BYACC

  #endif

#endif

#endif /* _diag_control_h */