Liren Large Software Subsidy 7/07.iso/c/c220/4.ddi/LIB/SRC/ENV.PF

Text File | 1990-12-16 | 1.1 KB | 30 lines

pragma c_include('implement.pf');
package Env;
   pragma routine_aliasing_convention(Implement.RTE_aliasing);
   { Package for processing the MS-DOS environemt string }

   var Env_separator:Char;    -- Separates substrings;
                                --    default: Dos -';', unix, xenix - ':'.
   iterator Each_env_field(const Name: String):(const S: String); external;
      {Iterator on each field of env name. A field is separated by Env_separator.}
      {If Name not found in environment, then routine returns without yielding}
      {anything.}

   { Example:
        Suppose the name PATH has been set to "/BIN;A:/;B:/XYZ"

        for S in Each_env_field('PATH') do ...
            yields the following strings in S:  '/BIN' 'A:/' 'B:/XYZ'
   }

   { Each Env_separator-separated substring of S. }
   iterator Each_env_substring(const S:String):(const Substring:String);external;

   -- Obtain the entire environment string as a single chunk:
   type Env_string = String(256);
   function Get_env(const Name: String): Env_string;        External;

   end;