Top Level Namespace

Defined Under Namespace

Modules: Bdb, Replication Classes: Array, Object

Instance Method Summary collapse

Instance Method Details

#create_header ⇒ Object 



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# File 'ext/extconf.rb', line 28

def create_header
  if File.exist?("bdb_aux._c")
    message("Not writing bdb_aux._c (defines), already exists\n")
    return
  end
  
  message("Writing bdb_aux._c (defines), this takes a while\n")

  db_header = $CPPFLAGS.split.select { |f| f =~ /^-I/ }.map { |e| 
    f = File.join(e[2..-1], 'db.h')
    File.exists?(f) ? f : nil
  }.select { |e| e }.first

  n=0
  defines=[]
  File.open(db_header) {|fd|
    File.open("bdb_aux._c","w") {|hd|
      hd.puts("/* This file automatically generated by extconf.rb */\n")
      fd.each_line {|l|
        if l =~ %r{^#define\s+(DBC?_\w*)\s+([^\/]*)\s*(.*?)(\/\*.*)?$}
          name = $1
          value = $2
          if macro_defined?(name,"#include <db.h>")
            case value
            when /^"/
              hd.print(%Q{cs(mBdb,%s);\n}%[name])
            when /^\(?(0x|\d)/
              hd.print(%Q{cu(mBdb,%s);\n}%[name])
            when /^\(?-/
              hd.print(%Q{ci(mBdb,%s);\n}%[name])
            else
              $stderr.puts "don't know how to handle #{name} #{value.strip}, guessing UINT"
              hd.print(%Q{cu(mBdb,%s);\n}%[name])
            end
            n+=1
          end
        end
      }
    }
    message("\nwrote #{n} defines\n")
  }
end