filter & csdbg::filter::set_expr ( const i8 *  expr, bool  icase  )

virtual

Set the filter expression.

Parameters

[in]	expr	the new expression
[in]	icase	true to ignore case on filtering, false otherwise

Returns

*this

Exceptions

csdbg::exception

Definition at line 96 of file filter.cpp.

References likely, m_expr, and unlikely.

Referenced by filter().

{
  if ( unlikely(expr == NULL) )
    throw exception("invalid argument: expr (=%p)", expr);

  regfree(&m_expr);
  i32 flags = REG_EXTENDED | REG_NOSUB;
  if ( unlikely(icase) )
    flags |= REG_ICASE;

  /* Compile the regular expression */
  i32 retval = regcomp(&m_expr, expr, flags);
  if ( likely(retval == 0) )
    return *this;

  /* If the expression compilation failed */
  i32 len = regerror(retval, &m_expr, NULL, 0);
  i8 errbuf[len];
  regerror(retval, &m_expr, errbuf, len);
  regfree(&m_expr);

  throw exception(
    "failed to compile filter '%s' (regex errno %d - %s)",
    expr,
    retval,
    errbuf
  );
}

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