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Annotation of pgp/src/cdefs.h, revision 1.1.1.2

1.1.1.2 ! root        1: /*
        !             2:  * Copyright (c) 1991, 1993
        !             3:  *     The Regents of the University of California.  All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)cdefs.h     8.1 (Berkeley) 6/2/93
        !            34:  */
        !            35: 
        !            36: #ifndef        _CDEFS_H_
        !            37: #define        _CDEFS_H_
        !            38: 
        !            39: #if defined(__cplusplus)
        !            40: #define        __BEGIN_DECLS   extern "C" {
        !            41: #define        __END_DECLS     };
        !            42: #else
        !            43: #define        __BEGIN_DECLS
        !            44: #define        __END_DECLS
        !            45: #endif
        !            46: 
        !            47: /*
        !            48:  * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
        !            49:  * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
        !            50:  * The __CONCAT macro is a bit tricky -- make sure you don't put spaces
        !            51:  * in between its arguments.  __CONCAT can also concatenate double-quoted
        !            52:  * strings produced by the __STRING macro, but this only works with ANSI C.
        !            53:  */
        !            54: #if defined(__STDC__) || defined(__cplusplus)
        !            55: #define        __P(protos)     protos          /* full-blown ANSI C */
        !            56: #define        __CONCAT(x,y)   x ## y
        !            57: #define        __STRING(x)     #x
        !            58: 
        !            59: #else  /* !(__STDC__ || __cplusplus) */
        !            60: #define        __P(protos)     ()              /* traditional C preprocessor */
        !            61: #define        __CONCAT(x,y)   x/**/y
        !            62: #define        __STRING(x)     "x"
        !            63: 
        !            64: #ifdef __GNUC__
        !            65: #define        const           __const         /* GCC: ANSI C with -traditional */
        !            66: #define        inline          __inline
        !            67: #define        signed          __signed
        !            68: #define        volatile        __volatile
        !            69: 
        !            70: #else  /* !__GNUC__ */
        !            71: #define        const                           /* delete ANSI C keywords */
        !            72: #define        inline
        !            73: #define        signed
        !            74: #define        volatile
        !            75: #endif /* !__GNUC__ */
        !            76: #endif /* !(__STDC__ || __cplusplus) */
        !            77: 
        !            78: /*
        !            79:  * GCC has extensions for declaring functions as `pure' (always returns
        !            80:  * the same value given the same inputs, i.e., has no external state and
        !            81:  * no side effects) and `dead' (nonreturning).  These mainly affect
        !            82:  * optimization and warnings.  Unfortunately, GCC complains if these are
        !            83:  * used under strict ANSI mode (`gcc -ansi -pedantic'), hence we need to
        !            84:  * define them only if compiling without this.
        !            85:  */
        !            86: #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
        !            87: #define __dead __volatile
        !            88: #define __pure __const
        !            89: #else
        !            90: #define __dead
        !            91: #define __pure
        !            92: #endif
        !            93: 
        !            94: #endif /* !_CDEFS_H_ */

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