4.4BSD/usr/share/man/cat3/re_exec.0

RE_COMP(3)                  BSD Programmer's Manual                 RE_COMP(3)

NNAAMMEE
     rree__ccoommpp, rree__eexxeecc - regular expression handler

SSYYNNOOPPSSIISS
     ##iinncclluuddee <<uunniissttdd..hh>>

     _c_h_a_r _*
     rree__ccoommpp(_c_o_n_s_t _c_h_a_r _*_s);

     _i_n_t
     rree__eexxeecc(_c_o_n_s_t _c_h_a_r _*_s);

DDEESSCCRRIIPPTTIIOONN
     This interface is made obsolete by regex(3).

     The rree__ccoommpp() function compiles a string into an internal form suitable
     for pattern matching.  The rree__eexxeecc() function checks the argument string
     against the last string passed to rree__ccoommpp().

     The rree__ccoommpp() function returns 0 if the string _s was compiled successful-
     ly; otherwise a string containing an error message is returned. If
     rree__ccoommpp() is passed 0 or a null string, it returns without changing the
     currently compiled regular expression.

     The rree__eexxeecc() function returns 1 if the string _s matches the last com-
     piled regular expression, 0 if the string _s failed to match the last com-
     piled regular expression, and -1 if the compiled regular expression was
     invalid (indicating an internal error).

     The strings passed to both rree__ccoommpp() and rree__eexxeecc() may have trailing or
     embedded newline characters; they are terminated by NULs. The regular ex-
     pressions recognized are described in the manual entry for ed(1),  given
     the above difference.

DDIIAAGGNNOOSSTTIICCSS
     The rree__eexxeecc() function returns -1 for an internal error.

     The rree__ccoommpp() function returns one of the following strings if an error
     occurs:

           No previous regular expression,
           Regular expression too long,
           unmatched \(,
           missing ],
           too many \(\) pairs,
           unmatched \).

SSEEEE AALLSSOO
     ed(1),  ex(1),  egrep(1),  fgrep(1),  grep(1),  regex(3)

HHIISSTTOORRYY
     The rree__ccoommpp() and rree__eexxeecc() functions appeared in 4.0BSD.

4.4BSD                           June 4, 1993                                1