regcmp(1)                                               regcmp(1)



     NAME
          regcmp - regular expression compile

     SYNOPSIS
          regcmp [-] file ...

     DESCRIPTION
          regcmp, in most cases, precludes the need for calling
          regcmp(3X) from C programs.  This saves on both execution
          time and program size.  The command regcmp compiles the reg-
          ular expressions in file and places the output in file.i.
          If the - flag option is used, the output will be placed in
          file.c.  The format of entries in file is a name (C vari-
          able) followed by one or more blanks followed by a regular
          expression enclosed in double quotes.  The output of regcmp
          is C source code.  Compiled regular expressions are
          represented as extern char vectors.  file.i files may thus
          be included into C programs, or file.c files may be compiled
          and later loaded.  In the C program which uses the regcmp
          output, regex(abc,line) will apply the regular expression
          named abc to line.  Diagnostics are self-explanatory.

     EXAMPLES
          name     ``([A-Za-z][A-Za-z0-9_]*)$0''

          telno    ``\({0,1}([2-9][01][1-9])$0\){0,1} *''
                   ``([2-9][0-9]{2})$1[ -]{0,1}''
                   ``([0-9]{4})$2''

          In the C program that uses the

                   regcmp output,


                   regex(telno, line, area, exch, rest)


          will apply the regular expression named telno to line.


     FILES

          /usr/bin/regcmp


     SEE ALSO

          cc(1), lex(1), regcmp(3X).














     April, 1990                                                     1