DBSEARCH

       Subroutine of DBFIND() to search a vector for specified values

       dbsearch, type, svals, values, good, [ /FULLSTRING, COUNT = ]

       type - type of search (output from dbfparse)
       svals - search values (output from dbfparse)
       values - array of values to search

       good - indices of good values

       /FULLSTRING - By default, one has a match if a search string is
               included in any part of a database value (substring match).
               But if /FULLSTRING is set, then all characters in the database
               value must match the search string (excluding leading and
               trailing blanks).    Both types of string searches are case
               insensitive.

       COUNT  - Integer scalar giving the number of valid matches

       The obsolete system variable !ERR is set to number of good values

       D. Lindler  July,1987
       Converted to IDL V5.0   W. Landsman   September 1997
       Added COUNT keyword, deprecate !ERR   W. Landsman   March 2000

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