diff --git a/form/fty_regex.c b/form/fty_regex.c
new file mode 100644
index 0000000..247779f
--- /dev/null
+++ b/form/fty_regex.c
@@ -0,0 +1,306 @@
+/****************************************************************************
+ * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc.              *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/***************************************************************************
+*                                                                          *
+*  Author : Juergen Pfeifer                                                *
+*                                                                          *
+***************************************************************************/
+
+#include "form.priv.h"
+
+MODULE_ID("$Id: fty_regex.c,v 1.21 2007/10/13 19:33:50 tom Exp $")
+
+#if HAVE_REGEX_H_FUNCS		/* We prefer POSIX regex */
+#include <regex.h>
+
+typedef struct
+  {
+    regex_t *pRegExp;
+    unsigned long *refCount;
+  }
+RegExp_Arg;
+
+#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
+#undef RETURN
+static int reg_errno;
+
+static char *
+RegEx_Init(char *instring)
+{
+  reg_errno = 0;
+  return instring;
+}
+
+static char *
+RegEx_Error(int code)
+{
+  reg_errno = code;
+  return 0;
+}
+
+#define INIT 		register char *sp = RegEx_Init(instring);
+#define GETC()		(*sp++)
+#define PEEKC()		(*sp)
+#define UNGETC(c)	(--sp)
+#define RETURN(c)	return(c)
+#define ERROR(c)	return RegEx_Error(c)
+
+#if HAVE_REGEXP_H_FUNCS
+#include <regexp.h>
+#else
+#include <regexpr.h>
+#endif
+
+typedef struct
+{
+  char *compiled_expression;
+  unsigned long *refCount;
+}
+RegExp_Arg;
+
+/* Maximum Length we allow for a compiled regular expression */
+#define MAX_RX_LEN   (2048)
+#define RX_INCREMENT (256)
+
+#endif
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform
+|   Function      :  static void *Make_RegularExpression_Type(va_list * ap)
+|
+|   Description   :  Allocate structure for regex type argument.
+|
+|   Return Values :  Pointer to argument structure or NULL on error
++--------------------------------------------------------------------------*/
+static void *
+Make_RegularExpression_Type(va_list *ap)
+{
+#if HAVE_REGEX_H_FUNCS
+  char *rx = va_arg(*ap, char *);
+  RegExp_Arg *preg;
+
+  preg = typeMalloc(RegExp_Arg, 1);
+
+  if (preg)
+    {
+      T((T_CREATE("RegExp_Arg %p"), preg));
+      if (((preg->pRegExp = typeMalloc(regex_t, 1)) != 0)
+	  && !regcomp(preg->pRegExp, rx,
+		      (REG_EXTENDED | REG_NOSUB | REG_NEWLINE)))
+	{
+	  T((T_CREATE("regex_t %p"), preg->pRegExp));
+	  preg->refCount = typeMalloc(unsigned long, 1);
+
+	  *(preg->refCount) = 1;
+	}
+      else
+	{
+	  if (preg->pRegExp)
+	    free(preg->pRegExp);
+	  free(preg);
+	  preg = (RegExp_Arg *)0;
+	}
+    }
+  return ((void *)preg);
+#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
+  char *rx = va_arg(*ap, char *);
+  RegExp_Arg *pArg;
+
+  pArg = typeMalloc(RegExp_Arg, 1);
+
+  if (pArg)
+    {
+      int blen = RX_INCREMENT;
+
+      T((T_CREATE("RegExp_Arg %p"), pArg));
+      pArg->compiled_expression = NULL;
+      pArg->refCount = typeMalloc(unsigned long, 1);
+
+      *(pArg->refCount) = 1;
+
+      do
+	{
+	  char *buf = typeMalloc(char, blen);
+
+	  if (buf)
+	    {
+#if HAVE_REGEXP_H_FUNCS
+	      char *last_pos = compile(rx, buf, &buf[blen], '\0');
+
+#else /* HAVE_REGEXPR_H_FUNCS */
+	      char *last_pos = compile(rx, buf, &buf[blen]);
+#endif
+	      if (reg_errno)
+		{
+		  free(buf);
+		  if (reg_errno == 50)
+		    blen += RX_INCREMENT;
+		  else
+		    {
+		      free(pArg);
+		      pArg = NULL;
+		      break;
+		    }
+		}
+	      else
+		{
+		  pArg->compiled_expression = buf;
+		  break;
+		}
+	    }
+	}
+      while (blen <= MAX_RX_LEN);
+    }
+  if (pArg && !pArg->compiled_expression)
+    {
+      free(pArg);
+      pArg = NULL;
+    }
+  return (void *)pArg;
+#else
+  return 0;
+#endif
+}
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform
+|   Function      :  static void *Copy_RegularExpression_Type(
+|                                      const void * argp)
+|
+|   Description   :  Copy structure for regex type argument.
+|
+|   Return Values :  Pointer to argument structure or NULL on error.
++--------------------------------------------------------------------------*/
+static void *
+Copy_RegularExpression_Type(const void *argp)
+{
+#if (HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS)
+  const RegExp_Arg *ap = (const RegExp_Arg *)argp;
+  const RegExp_Arg *result = (const RegExp_Arg *)0;
+
+  if (ap)
+    {
+      *(ap->refCount) += 1;
+      result = ap;
+    }
+  return (void *)result;
+#else
+  return 0;
+#endif
+}
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform
+|   Function      :  static void Free_RegularExpression_Type(void * argp)
+|
+|   Description   :  Free structure for regex type argument.
+|
+|   Return Values :  -
++--------------------------------------------------------------------------*/
+static void
+Free_RegularExpression_Type(void *argp)
+{
+#if HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
+  RegExp_Arg *ap = (RegExp_Arg *)argp;
+
+  if (ap)
+    {
+      if (--(*(ap->refCount)) == 0)
+	{
+#if HAVE_REGEX_H_FUNCS
+	  if (ap->pRegExp)
+	    {
+	      free(ap->refCount);
+	      regfree(ap->pRegExp);
+	    }
+#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
+	  if (ap->compiled_expression)
+	    {
+	      free(ap->refCount);
+	      free(ap->compiled_expression);
+	    }
+#endif
+	  free(ap);
+	}
+    }
+#endif
+}
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform
+|   Function      :  static bool Check_RegularExpression_Field(
+|                                      FIELD * field,
+|                                      const void  * argp)
+|
+|   Description   :  Validate buffer content to be a valid regular expression
+|
+|   Return Values :  TRUE  - field is valid
+|                    FALSE - field is invalid
++--------------------------------------------------------------------------*/
+static bool
+Check_RegularExpression_Field(FIELD *field, const void *argp)
+{
+  bool match = FALSE;
+
+#if HAVE_REGEX_H_FUNCS
+  const RegExp_Arg *ap = (const RegExp_Arg *)argp;
+
+  if (ap && ap->pRegExp)
+    match = (regexec(ap->pRegExp, field_buffer(field, 0), 0, NULL, 0)
+	     ? FALSE
+	     : TRUE);
+#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
+  RegExp_Arg *ap = (RegExp_Arg *)argp;
+
+  if (ap && ap->compiled_expression)
+    match = (step(field_buffer(field, 0), ap->compiled_expression)
+	     ? TRUE
+	     : FALSE);
+#endif
+  return match;
+}
+
+static FIELDTYPE typeREGEXP =
+{
+  _HAS_ARGS | _RESIDENT,
+  1,				/* this is mutable, so we can't be const */
+  (FIELDTYPE *)0,
+  (FIELDTYPE *)0,
+  Make_RegularExpression_Type,
+  Copy_RegularExpression_Type,
+  Free_RegularExpression_Type,
+  Check_RegularExpression_Field,
+  NULL,
+  NULL,
+  NULL
+};
+
+NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_REGEXP = &typeREGEXP;
+
+/* fty_regex.c ends here */