Return to fty_enum.c CVS log

Up to [local] / src / lib / libform

Update ncurses and associated libraries (form, panel, menu) to
6.4-20230826 (from 5.7-20081102).

Based on result from Thomas Dickey's ncu2openbsd script and then
modified. Switches to the upstream tput. Major bump for the ncurses
libraries and for libedit and libreadline.

Help from tb, millert.

ok deraadt sthen

/*	$OpenBSD: fty_enum.c,v 1.12 2023/10/17 09:52:10 nicm Exp $	*/
/****************************************************************************
 * Copyright 2020,2021 Thomas E. Dickey                                     *
 * Copyright 1998-2009,2010 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_enum.c,v 1.12 2023/10/17 09:52:10 nicm Exp $")

typedef struct
  {
    char **kwds;
    int count;
    bool checkcase;
    bool checkunique;
  }
enumARG;

typedef struct
  {
    char **kwds;
    int ccase;
    int cunique;
  }
enumParams;

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  static void *Generic_Enum_Type(void * arg)
|
|   Description   :  Allocate structure for enumeration type argument.
|
|   Return Values :  Pointer to argument structure or NULL on error
+--------------------------------------------------------------------------*/
static void *
Generic_Enum_Type(void *arg)
{
  enumARG *argp = (enumARG *)0;
  enumParams *params = (enumParams *)arg;

  if (params)
    {
      argp = typeMalloc(enumARG, 1);

      if (argp)
	{
	  int cnt = 0;
	  char **kp = (char **)0;
	  char **kwds = (char **)0;
	  int ccase, cunique;

	  T((T_CREATE("enumARG %p"), (void *)argp));
	  kwds = params->kwds;
	  ccase = params->ccase;
	  cunique = params->cunique;

	  argp->checkcase = ccase ? TRUE : FALSE;
	  argp->checkunique = cunique ? TRUE : FALSE;
	  argp->kwds = (char **)0;

	  kp = kwds;
	  while (kp && (*kp++))
	    cnt++;
	  argp->count = cnt;

	  if (cnt > 0)
	    {
	      char **kptarget;

	      /* We copy the keywords, because we can't rely on the fact
	         that the caller doesn't relocate or free the memory used
	         for the keywords (maybe he has GC)
	       */
	      argp->kwds = typeMalloc(char *, cnt + 1);

	      kp = kwds;
	      if ((kptarget = argp->kwds) != 0)
		{
		  while (kp && (*kp))
		    {
		      (*kptarget++) = strdup(*kp++);
		    }
		  *kptarget = (char *)0;
		}
	    }
	}
    }
  return (void *)argp;
}

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  static void *Make_Enum_Type( va_list * ap )
|
|   Description   :  Allocate structure for enumeration type argument.
|
|   Return Values :  Pointer to argument structure or NULL on error
+--------------------------------------------------------------------------*/
static void *
Make_Enum_Type(va_list *ap)
{
  enumParams params;

  params.kwds = va_arg(*ap, char **);
  params.ccase = va_arg(*ap, int);
  params.cunique = va_arg(*ap, int);

  return Generic_Enum_Type((void *)&params);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  static void *Copy_Enum_Type( const void * argp )
|
|   Description   :  Copy structure for enumeration type argument.
|
|   Return Values :  Pointer to argument structure or NULL on error.
+--------------------------------------------------------------------------*/
static void *
Copy_Enum_Type(const void *argp)
{
  enumARG *result = (enumARG *)0;

  if (argp)
    {
      const enumARG *ap = (const enumARG *)argp;

      result = typeMalloc(enumARG, 1);

      if (result)
	{
	  T((T_CREATE("enumARG %p"), (void *)result));
	  *result = *ap;

	  if (ap->count > 0)
	    {
	      char **kptarget;
	      char **kp = ap->kwds;
	      result->kwds = typeMalloc(char *, 1 + ap->count);

	      if ((kptarget = result->kwds) != 0)
		{
		  while (kp && (*kp))
		    {
		      (*kptarget++) = strdup(*kp++);
		    }
		  *kptarget = (char *)0;
		}
	    }
	}
    }
  return (void *)result;
}

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  static void Free_Enum_Type( void * argp )
|
|   Description   :  Free structure for enumeration type argument.
|
|   Return Values :  -
+--------------------------------------------------------------------------*/
static void
Free_Enum_Type(void *argp)
{
  if (argp)
    {
      const enumARG *ap = (const enumARG *)argp;

      if (ap->kwds && ap->count > 0)
	{
	  char **kp = ap->kwds;
	  int cnt = 0;

	  while (kp && (*kp))
	    {
	      free(*kp++);
	      cnt++;
	    }
	  assert(cnt == ap->count);
	  free(ap->kwds);
	}
      free(argp);
    }
}

#define SKIP_SPACE(x) while(((*(x))!='\0') && (is_blank(*(x)))) (x)++
#define NOMATCH 0
#define PARTIAL 1
#define EXACT   2

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  static int Compare(const unsigned char * s,
|                                       const unsigned char * buf,
|                                       bool  ccase )
|
|   Description   :  Check whether or not the text in 'buf' matches the
|                    text in 's', at least partial.
|
|   Return Values :  NOMATCH   - buffer doesn't match
|                    PARTIAL   - buffer matches partially
|                    EXACT     - buffer matches exactly
+--------------------------------------------------------------------------*/
static int
Compare(const unsigned char *s, const unsigned char *buf,
	bool ccase)
{
  SKIP_SPACE(buf);		/* Skip leading spaces in both texts */
  SKIP_SPACE(s);

  if (*buf == '\0')
    {
      return (((*s) != '\0') ? NOMATCH : EXACT);
    }
  else
    {
      if (ccase)
	{
	  while (*s++ == *buf)
	    {
	      if (*buf++ == '\0')
		return EXACT;
	    }
	}
      else
	{
	  while (toupper(*s++) == toupper(*buf))
	    {
	      if (*buf++ == '\0')
		return EXACT;
	    }
	}
    }
  /* At this location buf points to the first character where it no longer
     matches with s. So if only blanks are following, we have a partial
     match otherwise there is no match */
  SKIP_SPACE(buf);
  if (*buf)
    return NOMATCH;

  /* If it happens that the reference buffer is at its end, the partial
     match is actually an exact match. */
  return ((s[-1] != '\0') ? PARTIAL : EXACT);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  static bool Check_Enum_Field(
|                                      FIELD * field,
|                                      const void  * argp)
|
|   Description   :  Validate buffer content to be a valid enumeration value
|
|   Return Values :  TRUE  - field is valid
|                    FALSE - field is invalid
+--------------------------------------------------------------------------*/
static bool
Check_Enum_Field(FIELD *field, const void *argp)
{
  char **kwds = ((const enumARG *)argp)->kwds;
  bool ccase = ((const enumARG *)argp)->checkcase;
  bool unique = ((const enumARG *)argp)->checkunique;
  unsigned char *bp = (unsigned char *)field_buffer(field, 0);
  char *s, *t, *p;

  while (kwds && (s = (*kwds++)))
    {
      int res;

      if ((res = Compare((unsigned char *)s, bp, ccase)) != NOMATCH)
	{
	  p = t = s;		/* t is at least a partial match */
	  if ((unique && res != EXACT))
	    {
	      while (kwds && (p = *kwds++))
		{
		  if ((res = Compare((unsigned char *)p, bp, ccase)) != NOMATCH)
		    {
		      if (res == EXACT)
			{
			  t = p;
			  break;
			}
		      else
			t = (char *)0;
		    }
		}
	    }
	  if (t)
	    {
	      set_field_buffer(field, 0, t);
	      return TRUE;
	    }
	  if (!p)
	    break;
	}
    }
  return FALSE;
}

static const char *dummy[] =
{(char *)0};

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  static bool Next_Enum(FIELD * field,
|                                          const void * argp)
|
|   Description   :  Check for the next enumeration value
|
|   Return Values :  TRUE  - next value found and loaded
|                    FALSE - no next value loaded
+--------------------------------------------------------------------------*/
static bool
Next_Enum(FIELD *field, const void *argp)
{
  const enumARG *args = (const enumARG *)argp;
  char **kwds = args->kwds;
  bool ccase = args->checkcase;
  int cnt = args->count;
  unsigned char *bp = (unsigned char *)field_buffer(field, 0);

  if (kwds)
    {
      while (cnt--)
	{
	  if (Compare((unsigned char *)(*kwds++), bp, ccase) == EXACT)
	    break;
	}
      if (cnt <= 0)
	kwds = args->kwds;
      if ((cnt >= 0) || (Compare((const unsigned char *)dummy, bp, ccase) == EXACT))
	{
	  set_field_buffer(field, 0, *kwds);
	  return TRUE;
	}
    }
  return FALSE;
}

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  static bool Previous_Enum(
|                                          FIELD * field,
|                                          const void * argp)
|
|   Description   :  Check for the previous enumeration value
|
|   Return Values :  TRUE  - previous value found and loaded
|                    FALSE - no previous value loaded
+--------------------------------------------------------------------------*/
static bool
Previous_Enum(FIELD *field, const void *argp)
{
  const enumARG *args = (const enumARG *)argp;
  int cnt = args->count;
  char **kwds = &args->kwds[cnt - 1];
  bool ccase = args->checkcase;
  unsigned char *bp = (unsigned char *)field_buffer(field, 0);

  if (kwds)
    {
      while (cnt--)
	{
	  if (Compare((unsigned char *)(*kwds--), bp, ccase) == EXACT)
	    break;
	}

      if (cnt <= 0)
	kwds = &args->kwds[args->count - 1];

      if ((cnt >= 0) || (Compare((const unsigned char *)dummy, bp, ccase) == EXACT))
	{
	  set_field_buffer(field, 0, *kwds);
	  return TRUE;
	}
    }
  return FALSE;
}

static FIELDTYPE typeENUM =
{
  _HAS_ARGS | _HAS_CHOICE | _RESIDENT,
  1,				/* this is mutable, so we can't be const */
  (FIELDTYPE *)0,
  (FIELDTYPE *)0,
  Make_Enum_Type,
  Copy_Enum_Type,
  Free_Enum_Type,
  INIT_FT_FUNC(Check_Enum_Field),
  INIT_FT_FUNC(NULL),
  INIT_FT_FUNC(Next_Enum),
  INIT_FT_FUNC(Previous_Enum),
#if NCURSES_INTEROP_FUNCS
  Generic_Enum_Type
#endif
};

FORM_EXPORT_VAR(FIELDTYPE *) TYPE_ENUM = &typeENUM;

#if NCURSES_INTEROP_FUNCS
/* The next routines are to simplify the use of ncurses from
   programming languages with restrictions on interop with C level
   constructs (e.g. variable access or va_list + ellipsis constructs)
*/
FORM_EXPORT(FIELDTYPE *)
_nc_TYPE_ENUM(void)
{
  return TYPE_ENUM;
}
#endif

/* fty_enum.c ends here */