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//----------------------------------------------------------------------

//   Copyright 2010-2011 Mentor Graphics Corporation

//   All Rights Reserved Worldwide

//

//   Licensed under the Apache License, Version 2.0 (the

//   "License"); you may not use this file except in

//   compliance with the License.  You may obtain a copy of

//   the License at

//

//       http://www.apache.org/licenses/LICENSE-2.0

//

//   Unless required by applicable law or agreed to in

//   writing, software distributed under the License is

//   distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR

//   CONDITIONS OF ANY KIND, either express or implied.  See

//   the License for the specific language governing

//   permissions and limitations under the License.

//----------------------------------------------------------------------

`ifndef UVM_REGEX_NO_DPI

import "DPI-C" context function int uvm_re_match(string re, string str);

import "DPI-C" context function void uvm_dump_re_cache();

import "DPI-C" context function string uvm_glob_to_re(string glob);

`else

// The Verilog only version does not match regular expressions,

// it only does glob style matching.

function int uvm_re_match(string re, string str);

  int e, es, s, ss;

  string tmp;

  e  = 0; s  = 0;

  es = 0; ss = 0;

  if(re.len() == 0)

    return 0;

  // The ^ used to be used to remove the implicit wildcard, but now we don't

  // use implicit wildcard so this character is just stripped.

  if(re[0] == "^")

    re = re.substr(1, re.len()-1);

  //This loop is only needed when the first character of the re may not

  //be a *.

  while (s != str.len() && re.getc(e) != "*") begin

    if ((re.getc(e) != str.getc(s)) && (re.getc(e) != "?"))

      return 1;

    e++; s++;

  end

  while (s != str.len()) begin

    if (re.getc(e) == "*") begin

      e++;

      if (e == re.len()) begin

        return 0;

      end

      es = e;

      ss = s+1;

    end

    else if (re.getc(e) == str.getc(s) || re.getc(e) == "?") begin

      e++;

      s++;

    end

    else begin

      e = es;

      s = ss++;

    end

  end

  while (e < re.len() && re.getc(e) == "*")

    e++;

  if(e == re.len()) begin

    return 0;

  end

  else begin

    return 1;

  end

endfunction

function void uvm_dump_re_cache();

endfunction

function string uvm_glob_to_re(string glob);

  return glob;

endfunction

`endif