GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libform/fty_regex.c Lines: 0 26 0.0 %
Date: 2017-11-13 Branches: 0 22 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: fty_regex.c,v 1.9 2015/01/23 22:48:51 krw Exp $	*/
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/****************************************************************************
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 * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc.              *
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 *                                                                          *
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 * Permission is hereby granted, free of charge, to any person obtaining a  *
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 * copy of this software and associated documentation files (the            *
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 * "Software"), to deal in the Software without restriction, including      *
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 * without limitation the rights to use, copy, modify, merge, publish,      *
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 * distribute, distribute with modifications, sublicense, and/or sell       *
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 * copies of the Software, and to permit persons to whom the Software is    *
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 * furnished to do so, subject to the following conditions:                 *
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 *                                                                          *
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 * The above copyright notice and this permission notice shall be included  *
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 * in all copies or substantial portions of the Software.                   *
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 *                                                                          *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
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 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
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 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
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 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
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 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
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 *                                                                          *
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 * Except as contained in this notice, the name(s) of the above copyright   *
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 * holders shall not be used in advertising or otherwise to promote the     *
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 * sale, use or other dealings in this Software without prior written       *
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 * authorization.                                                           *
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 ****************************************************************************/
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/***************************************************************************
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*                                                                          *
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*  Author : Juergen Pfeifer                                                *
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*                                                                          *
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***************************************************************************/
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#include "form.priv.h"
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MODULE_ID("$Id: fty_regex.c,v 1.9 2015/01/23 22:48:51 krw Exp $")
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#if HAVE_REGEX_H_FUNCS		/* We prefer POSIX regex */
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#include <regex.h>
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typedef struct
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  {
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    regex_t *pRegExp;
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    unsigned long *refCount;
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  }
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RegExp_Arg;
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#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
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#undef RETURN
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static int reg_errno;
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static char *
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RegEx_Init(char *instring)
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{
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  reg_errno = 0;
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  return instring;
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}
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static char *
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RegEx_Error(int code)
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{
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  reg_errno = code;
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  return 0;
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}
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#define INIT 		register char *sp = RegEx_Init(instring);
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#define GETC()		(*sp++)
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#define PEEKC()		(*sp)
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#define UNGETC(c)	(--sp)
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#define RETURN(c)	return(c)
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#define ERROR(c)	return RegEx_Error(c)
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#if HAVE_REGEXP_H_FUNCS
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#include <regexp.h>
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#else
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#include <regexpr.h>
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#endif
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typedef struct
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{
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  char *compiled_expression;
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  unsigned long *refCount;
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}
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RegExp_Arg;
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/* Maximum Length we allow for a compiled regular expression */
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#define MAX_RX_LEN   (2048)
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#define RX_INCREMENT (256)
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#endif
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/*---------------------------------------------------------------------------
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|   Facility      :  libnform
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|   Function      :  static void *Make_RegularExpression_Type(va_list * ap)
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|
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|   Description   :  Allocate structure for regex type argument.
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|
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|   Return Values :  Pointer to argument structure or NULL on error
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+--------------------------------------------------------------------------*/
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static void *
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Make_RegularExpression_Type(va_list *ap)
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{
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#if HAVE_REGEX_H_FUNCS
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  char *rx = va_arg(*ap, char *);
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  RegExp_Arg *preg;
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  preg = typeMalloc(RegExp_Arg, 1);
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  if (preg)
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    {
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      T((T_CREATE("RegExp_Arg %p"), preg));
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      if (((preg->pRegExp = typeMalloc(regex_t, 1)) != 0)
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	  && !regcomp(preg->pRegExp, rx,
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		      (REG_EXTENDED | REG_NOSUB | REG_NEWLINE)))
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	{
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	  T((T_CREATE("regex_t %p"), preg->pRegExp));
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	  preg->refCount = typeMalloc(unsigned long, 1);
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	  *(preg->refCount) = 1;
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	}
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      else
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	{
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	  if (preg->pRegExp)
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	    free(preg->pRegExp);
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	  free(preg);
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	  preg = (RegExp_Arg *)0;
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	}
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    }
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  return ((void *)preg);
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#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
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  char *rx = va_arg(*ap, char *);
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  RegExp_Arg *pArg;
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  pArg = typeMalloc(RegExp_Arg, 1);
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  if (pArg)
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    {
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      int blen = RX_INCREMENT;
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      T((T_CREATE("RegExp_Arg %p"), pArg));
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      pArg->compiled_expression = NULL;
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      pArg->refCount = typeMalloc(unsigned long, 1);
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      *(pArg->refCount) = 1;
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      do
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	{
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	  char *buf = typeMalloc(char, blen);
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	  if (buf)
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	    {
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#if HAVE_REGEXP_H_FUNCS
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	      char *last_pos = compile(rx, buf, &buf[blen], '\0');
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#else /* HAVE_REGEXPR_H_FUNCS */
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	      char *last_pos = compile(rx, buf, &buf[blen]);
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#endif
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	      if (reg_errno)
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		{
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		  free(buf);
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		  if (reg_errno == 50)
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		    blen += RX_INCREMENT;
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		  else
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		    {
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		      free(pArg);
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		      pArg = NULL;
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		      break;
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		    }
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		}
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	      else
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		{
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		  pArg->compiled_expression = buf;
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		  break;
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		}
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	    }
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	}
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      while (blen <= MAX_RX_LEN);
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    }
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  if (pArg && !pArg->compiled_expression)
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    {
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      free(pArg);
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      pArg = NULL;
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    }
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  return (void *)pArg;
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#else
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  return 0;
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#endif
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}
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/*---------------------------------------------------------------------------
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|   Facility      :  libnform
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|   Function      :  static void *Copy_RegularExpression_Type(
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|                                      const void * argp)
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|
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|   Description   :  Copy structure for regex type argument.
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|
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|   Return Values :  Pointer to argument structure or NULL on error.
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+--------------------------------------------------------------------------*/
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static void *
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Copy_RegularExpression_Type(const void *argp)
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{
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#if (HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS)
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  const RegExp_Arg *ap = (const RegExp_Arg *)argp;
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  const RegExp_Arg *result = (const RegExp_Arg *)0;
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  if (ap)
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    {
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      *(ap->refCount) += 1;
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      result = ap;
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    }
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  return (void *)result;
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#else
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  return 0;
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#endif
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}
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/*---------------------------------------------------------------------------
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|   Facility      :  libnform
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|   Function      :  static void Free_RegularExpression_Type(void * argp)
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|
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|   Description   :  Free structure for regex type argument.
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|
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|   Return Values :  -
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+--------------------------------------------------------------------------*/
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static void
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Free_RegularExpression_Type(void *argp)
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{
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#if HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
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  RegExp_Arg *ap = (RegExp_Arg *)argp;
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  if (ap)
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    {
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      if (--(*(ap->refCount)) == 0)
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	{
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#if HAVE_REGEX_H_FUNCS
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	  if (ap->pRegExp)
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	    {
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	      free(ap->refCount);
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	      regfree(ap->pRegExp);
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	    }
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#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
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	  if (ap->compiled_expression)
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	    {
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	      free(ap->refCount);
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	      free(ap->compiled_expression);
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	    }
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#endif
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	  free(ap);
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	}
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    }
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#endif
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}
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/*---------------------------------------------------------------------------
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|   Facility      :  libnform
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|   Function      :  static bool Check_RegularExpression_Field(
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|                                      FIELD * field,
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|                                      const void  * argp)
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|
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|   Description   :  Validate buffer content to be a valid regular expression
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|
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|   Return Values :  TRUE  - field is valid
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|                    FALSE - field is invalid
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+--------------------------------------------------------------------------*/
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static bool
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Check_RegularExpression_Field(FIELD *field, const void *argp)
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{
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  bool match = FALSE;
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#if HAVE_REGEX_H_FUNCS
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  const RegExp_Arg *ap = (const RegExp_Arg *)argp;
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  if (ap && ap->pRegExp)
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    match = (regexec(ap->pRegExp, field_buffer(field, 0), 0, NULL, 0)
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	     ? FALSE
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	     : TRUE);
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#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
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  RegExp_Arg *ap = (RegExp_Arg *)argp;
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  if (ap && ap->compiled_expression)
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    match = (step(field_buffer(field, 0), ap->compiled_expression)
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	     ? TRUE
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	     : FALSE);
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#endif
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  return match;
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}
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static FIELDTYPE typeREGEXP =
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{
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  _HAS_ARGS | _RESIDENT,
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  1,				/* this is mutable, so we can't be const */
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  (FIELDTYPE *)0,
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  (FIELDTYPE *)0,
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  Make_RegularExpression_Type,
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  Copy_RegularExpression_Type,
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  Free_RegularExpression_Type,
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  Check_RegularExpression_Field,
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  NULL,
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  NULL,
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  NULL
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};
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NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_REGEXP = &typeREGEXP;
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/* fty_regex.c ends here */