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 * Copyright (C) 1990-2007, Condor Team, Computer Sciences Department,
 * University of Wisconsin-Madison, WI.
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License.  You may
 * obtain a copy of the License at
 *    http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.


/** Class to interpret the Condor Version string. 
Every Condor binary contains a version string embedded into it at
compile time.  This class extracts that version string and can parse it.
Furthermore, this class can be used to determine if different components
of Condor are compatible with one another.      */
00029 class CondorVersionInfo

      /** Constructor.  Pass in the version string and subsystem to parse.
            Typically these parameters are NULL, then the version string and 
            subsystem compiled into this binary are used.  Other common sources 
            for a versionstring could be from the get_version_from_file() 
            method (which is static, so it can be invoked before calling
            the constructor), or passed as part of a protocol, etc.
            @param versionstring See condor_version.C for format.
            @param subssytem One of SHADOW, STARTER, TOOL, SCHEDD, COLLECTOR, etc.
      CondorVersionInfo(const char *versionstring = NULL, 
            const char *subsystem = NULL, const char *platformstring = NULL);

      CondorVersionInfo(CondorVersionInfo const &);

      /// Destructor.

      static char *get_version_from_file(const char* filename, 
                                          char *ver = NULL, int maxlen = 0);
      static char *get_platform_from_file(const char* filename, 
                                          char *platform = NULL, int maxlen = 0);

      /** Return the first number in the version ID.
            @return -1 on error */
00057       int getMajorVer() const
            { return myversion.MajorVer > 5 ? myversion.MajorVer : -1; }
      /** Return the second number in the version ID (the series id).
            @return -1 on error */
00061       int getMinorVer() const
            { return myversion.MajorVer > 5 ? myversion.MinorVer : -1; }
      /** Return the third number in the version ID (release id within the series).
            @return -1 on error */
00065       int getSubMinorVer() const
            { return myversion.MajorVer > 5 ? myversion.SubMinorVer : -1; }

      /** Return the Arch this version is built for. */
00070       char *getArchVer() const
            { return myversion.Arch; }    
      char *getOpSysVer() const
            { return myversion.OpSys; }   
      /** Report if this version id represents a stable or developer series 
            @return true if a stable series, otherwise false. */
00078       bool is_stable_series() const
            { return (myversion.MinorVer % 2 == 0);  }

      int compare_versions(const char* other_version_string) const;
      int compare_build_dates(const char* other_version_string) const;
      bool built_since_version(int MajorVer, int MinorVer, int SubMinorVer) const;

      // Note: for "month", 1=Jan, 2=Feb, etc, as you'd expect
      bool built_since_date(int month, int day, int year) const;

      bool is_compatible(const char* other_version_string, 
                                 const char* other_subsys = NULL) const;

      bool is_valid(const char* VersionString = NULL) const;

            // Constructs version string from version info.
            // Caller should free returned string when done with it.
            // Returns NULL on error.
      char *get_version_string() const;

      typedef struct VersionData {
            int MajorVer;
            int MinorVer;
            int SubMinorVer;
            int Scalar;
            time_t BuildDate;
            char *Arch;
            char *OpSys;
      } VersionData_t;

      VersionData_t myversion;
      char *mysubsys;

      bool string_to_VersionData(const char *,VersionData_t &) const;
      bool string_to_PlatformData(const char *,VersionData_t &) const;

      char *VersionData_to_string(VersionData_t const &ver) const;


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