Scheme code for manipulating strings and characters.

lang/scheme/code/ext/strings/

   char_set/  Character Sets: Implementation of character sets 
              in Scheme.
   conc_str/  Conc-String: Strings for efficient concatenation.
   read_str/  Portable implementation of READ-STRING for 
              Scheme.
   str_ops/   Collection of miscellaneous procedures that 
              operate on strings.
   substr/    Substring matching code.
   unpack/    Unpack integers from a string.