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      1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /*
      3  * The contents of this file are subject to the Mozilla Public
      4  * License Version 1.1 (the "License"); you may not use this file
      5  * except in compliance with the License. You may obtain a copy of
      6  * the License at http://www.mozilla.org/MPL/
      7  *
      8  * Software distributed under the License is distributed on an "AS
      9  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
     10  * implied. See the License for the specific language governing
     11  * rights and limitations under the License.
     12  *
     13  * The Original Code is the Netscape Portable Runtime (NSPR).
     14  *
     15  * The Initial Developer of the Original Code is Netscape
     16  * Communications Corporation.  Portions created by Netscape are
     17  * Copyright (C) 1998-2000 Netscape Communications Corporation.  All
     18  * Rights Reserved.
     19  *
     20  * Contributor(s):
     21  *
     22  * Alternatively, the contents of this file may be used under the
     23  * terms of the GNU General Public License Version 2 or later (the
     24  * "GPL"), in which case the provisions of the GPL are applicable
     25  * instead of those above.  If you wish to allow use of your
     26  * version of this file only under the terms of the GPL and not to
     27  * allow others to use your version of this file under the MPL,
     28  * indicate your decision by deleting the provisions above and
     29  * replace them with the notice and other provisions required by
     30  * the GPL.  If you do not delete the provisions above, a recipient
     31  * may use your version of this file under either the MPL or the
     32  * GPL.
     33  */
     34 
     35 
     36 /* author: jstewart */
     37 
     38 #if defined(_PRVERSION_H)
     39 #else
     40 #define _PRVERSION_H
     41 
     42 #include "prtypes.h"
     43 
     44 PR_BEGIN_EXTERN_C
     45 
     46 /* All components participating in the PR version protocol must expose
     47  * a structure and a function. The structure is defined below and named
     48  * according to the naming conventions outlined further below.  The function
     49  * is called libVersionPoint and returns a pointer to this structure.
     50  */
     51 
     52 /* on NT, always pack the structure the same. */
     53 #ifdef _WIN32
     54 #pragma pack(push, 8)
     55 #endif
     56 
     57 typedef struct {
     58     /*
     59      * The first field defines which version of this structure is in use.
     60      * At this time, only version 2 is specified. If this value is not
     61      * 2, you must read no further into the structure.
     62      */
     63     PRInt32    version;
     64 
     65     /* for Version 2, this is the body format. */
     66     PRInt64         buildTime;      /* 64 bits - usecs since midnight, 1/1/1970 */
     67     char *          buildTimeString;/* a human readable version of the time */
     68 
     69     PRUint8   vMajor;               /* Major version of this component */
     70     PRUint8   vMinor;               /* Minor version of this component */
     71     PRUint8   vPatch;               /* Patch level of this component */
     72 
     73     PRBool          beta;           /* true if this is a beta component */
     74     PRBool          debug;          /* true if this is a debug component */
     75     PRBool          special;        /* true if this component is a special build */
     76 
     77     char *          filename;       /* The original filename */
     78     char *          description;    /* description of this component */
     79     char *          security;       /* level of security in this component */
     80     char *          copyright;      /* The copyright for this file */
     81     char *          comment;        /* free form field for misc usage */
     82     char *          specialString;  /* the special variant for this build */
     83 } PRVersionDescription;
     84 
     85 /* on NT, restore the previous packing */
     86 #ifdef _WIN32
     87 #pragma pack(pop)
     88 #endif
     89 
     90 /*
     91  * All components must define an entrypoint named libVersionPoint which
     92  * is of type versionEntryPointType.
     93  *
     94  * For example, for a library named libfoo, we would have:
     95  *
     96  *   PRVersionDescription prVersionDescription_libfoo =
     97  *   {
     98  *       ...
     99  *   };
    100  *
    101  *   PR_IMPLEMENT(const PRVersionDescription*) libVersionPoint(void)
    102  *   {
    103  *       return &prVersionDescription_libfoo;
    104  *   }
    105  */
    106 typedef const PRVersionDescription *(*versionEntryPointType)(void);
    107 
    108 /*
    109  * Where you declare your libVersionPoint, do it like this:
    110  * PR_IMPLEMENT(const PRVersionDescription *) libVersionPoint(void) {
    111  *  fill it in...
    112  * }
    113  */
    114 
    115 /*
    116  * NAMING CONVENTION FOR struct
    117  *
    118  * all components should also expose a static PRVersionDescription
    119  * The name of the struct should be calculated as follows:
    120  * Take the value of filename. (If filename is not specified, calculate
    121  * a short, unique string.)  Convert all non-alphanumeric characters
    122  * to '_'.  To this, prepend "PRVersionDescription_".  Thus for libfoo.so,
    123  * the symbol name is "PRVersionDescription_libfoo_so".
    124  * so the file should have
    125  * PRVersionDescription PRVersionDescription_libfoo_so { fill it in };
    126  * on NT, this file should be declspec export.
    127  */
    128 
    129 PR_END_EXTERN_C
    130 
    131 #endif  /* defined(_PRVERSION_H) */
    132 
    133 /* prvrsion.h */
    134 
    135