remove support for non-ANSI compilation

*** 19,39 ****
   * CDDL HEADER END
   */
  /*      Copyright (c) 1988 AT&T */
  /*        All Rights Reserved   */
  
- 
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  #ifndef _REGEXP_H
  #define _REGEXP_H
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"        /* SVr4.0 1.9   */
- 
  #include <string.h>
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
--- 19,38 ----
   * CDDL HEADER END
   */
  /*      Copyright (c) 1988 AT&T */
  /*        All Rights Reserved   */
  
  /*
+  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+  *
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  #ifndef _REGEXP_H
  #define _REGEXP_H
  
  #include <string.h>
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
*** 68,94 ****
  static int      low;
  static int      size;
  
  static unsigned char    bittab[] = { 1, 2, 4, 8, 16, 32, 64, 128 };
  
- #ifdef  __STDC__
  int advance(const char *lp, const char *ep);
  static void getrnge(const char *str);
- #else
- int advance();
- static void getrnge();
- #endif
  
  char *
- #ifdef  __STDC__
  compile(char *instring, char *ep, const char *endbuf, int seof)
- #else
- compile(instring, ep, endbuf, seof)
- register char *ep;
- char *instring, *endbuf;
- int seof;
- #endif
  {
          INIT    /* Dependent declarations and initializations */
          register int c;
          register int eof = seof;
          char *lastep;
--- 67,81 ----
*** 313,330 ****
                  }
          }
          /*NOTREACHED*/
  }
  
- #ifdef  __STDC__
  int
  step(const char *p1, const char *p2)
- #else
- int
- step(p1, p2)
- register char *p1, *p2;
- #endif
  {
          char c;
  
  
          if (circf) {
--- 300,311 ----
*** 353,374 ****
          } while (*p1++);
          return (0);
  }
  
  int
- #ifdef  __STDC__
  advance(const char *lp, const char *ep)
- #else
- advance(lp, ep)
- register char *lp, *ep;
- #endif
  {
- #ifdef  __STDC__
          const char *curlp;
- #else
-         register char *curlp;
- #endif
          int c;
          char *bbeg;
          register char neg;
          size_t ct;
  
--- 334,346 ----
*** 578,593 ****
          }
          /*NOTREACHED*/
  }
  
  static void
- #ifdef  __STDC__
  getrnge(const char *str)
- #else
- getrnge(str)
- register char *str;
- #endif
  {
          low = *str++ & 0377;
          size = ((*str & 0377) == 255)? 20000: (*str &0377) - low;
  }
  
--- 550,560 ----