Module: GenerateHeader

Defined in:
ext/lapack/extconf.rb

Class Method Summary collapse

Class Method Details

.write(dir, outname, version = nil) ⇒ Object 



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# File 'ext/lapack/extconf.rb', line 27

def self.write(dir, outname, version = nil)
   outname = File.expand_path(outname)
   Dir.chdir(dir) {
      Dir.glob('*.P') { |f| File.unlink(f) }
      if system("f2c -R -P -\!c *.f")
         File.open(outname, "w") { |outfile|
            macro = File.basename(outname.upcase.gsub(".","_"))
            outfile.puts "#ifndef #{macro}"
            outfile.puts "#define #{macro}"
            outfile.puts "/* version #{version} */ " if version
            outfile.puts "/* generated #{Time.now} */"
            outfile.puts
            Dir.glob('*.P') { |pname|
               File.open(pname) { |pfile|
                  pfile.each { |line|
                     next unless line =~ %r!^extern!

                     # I don't understand why f2c inserts these ftnlen params
                     while line.gsub!(%r!, ftnlen [a-z]+_len\)!, ")") ; end

                     outfile.write line
                  }
               }
            }

            outfile.puts
            outfile.puts "#endif"
         }
      end
   }
end