NAME

       Regexp - regular expression searching

SYNOPSIS

       #include <InterViews/regexp.h>

DESCRIPTION

       A  Regexp encapsulates a regular expression pattern and defines operations for searching and matching the
       pattern against a string.  The syntax of the regular expression pattern is the same as  that  for  ed(1).
       Information  can  be  obtained  about  the  most  recent  match  of  the regular expression (and its sub-
       expressions).

PUBLIC OPERATIONS

       Regexp(const char* pattern)
       Regexp(const char* pattern, int length)
              Construct a new Regexp for pattern.

       int Match(const char* text, int length, int index)
              Attempt a match against text (of length length) at position index.  The return value is the length
              of the matching string, or a negative number if the match failed.

       int Search(const char* text, int length, int index, int range)
              Search  for  a  match  in  the  string text (of length length).  Matches are attempted starting at
              positions between index and index plus range.  If range is positive the first match after index is
              reported.  If range is negative the first match before index is reported.  The return value is the
              index of the starting position of the match, or a negative number if there  is  no  match  in  the
              specified range.

       int BeginningOfMatch(int subexp)
       int EndOfMatch(int subexp)
              Return  information  about the most recent match.  If subexp is zero (the default), information is
              reported for the complete regular expression.  Other values of subexp refer to sub-expressions  in
              the  pattern.   For  example,  if  subexp  is  2,  information  is returned for the sub-expression
              specified by the second pair of \( and \) delimiters in the pattern.

SEE ALSO

       ed(1)