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/*
Copyright (C) 2015-2020, Dirk Krause
SPDX-License-Identifier: BSD-3-Clause
*/

/*
	WARNING: This file was generated by the dkct program (see
	http://dktools.sourceforge.net/ for details).
	Changes you make here will be lost if dkct is run again!
	You should modify the original source and run dkct on it.
	Original source: dk4dbitw.ctr
*/

/**	@file dk4dbitw.c The dk4dbitw module.
*/


#line 165 "dk4dbitw.ctr"

#include "dk4conf.h"

#include "dk4strw.h"
#include "dk4dbitw.h"
#include "dk4maasz.h"





#line 175 "dk4dbitw.ctr"



/**	Object for database traversal.
*/
typedef struct {
  void				*obj;	/**< Object for string traversal. */
  dk4dbi_wc_traverse_fct_t	*fct;	/**< String traversal function. */
} dk4dbi_wc_traversal_object_t;



int
dk4dbi_wc_del(
  dk4_dbi_t	*db,
  const wchar_t	*k,
  dk4_er_t	*erp
)
{
  dk4_er_t	 er;
  size_t	 ks	= 0;
  int		 back	= 0;
  if ((NULL != db) && (NULL != k)) {
    dk4error_init(&er);
    ks = dk4ma_size_t_mul(
      sizeof(wchar_t),
      dk4ma_size_t_add(1, dk4strw_len(k), &er),
      &er
    );
    if (DK4_E_NONE == er.ec) {
      back = dk4dbi_delete(db, k, ks, erp);
    } else {
      dk4error_copy(erp, &er);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}



int
dk4dbi_wc_set(
  dk4_dbi_t	*db,
  const wchar_t	*k,
  const wchar_t	*v,
  dk4_er_t	*erp
)
{
  dk4_er_t	 er;
  size_t	 ks	= 0;
  size_t	 vs	= 0;
  int		 back	= 0;

  if ((NULL != db) && (NULL != k)) {
    if (NULL != v) {
      dk4error_init(&er);
      ks = dk4ma_size_t_mul(
        sizeof(wchar_t),
        dk4ma_size_t_add(1, dk4strw_len(k), &er),
	&er
      );
      vs = dk4ma_size_t_mul(
        sizeof(wchar_t),
        dk4ma_size_t_add(1, dk4strw_len(v), &er),
	&er
      );
      if (DK4_E_NONE == er.ec) {
        back = dk4dbi_set(db, k, ks, v, vs, erp);
      } else {
        dk4error_copy(erp, &er);
      }
    } else {
      back = dk4dbi_wc_del(db, k, erp);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}



int
dk4dbi_wc_get(
  dk4_dbi_t	*db,
  const wchar_t	*k,
  wchar_t	*vbuf,
  size_t	 vsz,
  dk4_er_t	*erp
)
{
  dk4_er_t	 er;
  size_t	 ks	= 0;
  size_t	 ressz	= 0;
  int		 back	= 0;
  if ((NULL != vbuf) && (0 < vsz)) { *vbuf = L'\0'; }
  if ((NULL != db) && (NULL != k) && (NULL != vbuf) && (0 < vsz)) {
    dk4error_init(&er);
    ressz = dk4ma_size_t_mul(sizeof(wchar_t), vsz, &er);
    ks = dk4ma_size_t_mul(
      sizeof(wchar_t),
      dk4ma_size_t_add(1, dk4strw_len(k), &er),
      &er
    );
    if (DK4_E_NONE == er.ec) {
      if (0 != dk4dbi_get(db, k, ks, vbuf, &ressz, erp)) {
        if (0 == (ressz % sizeof(wchar_t))) {
	  ressz = ressz / sizeof(wchar_t);
          if (0 < ressz) {
	    if (L'\0' == vbuf[ressz - 1]) {
	      back = 1;
	    } else {
	      if (ressz < vsz) {
	        vbuf[ressz] = L'\0';
	        back = 1;
	      } else {
	        *vbuf = L'\0';
	        dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
	      }
	    }
	  } else {
	    *vbuf = L'\0';
	    dk4error_set_simple_error_code(erp, DK4_E_NOT_FOUND);
	  }
	} else {
	  *vbuf = L'\0';
	  dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
	}
      }
    } else {
      dk4error_copy(erp, &er);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}



/**	Function to traverse a simple database.
	The function must check the kb, ks, vb and vs arguments
	for validity, they are passed as found by the backend
	functions (this means pointers may be NULL, sizes may be 0).
	@param	Object modified during traversal, may be NULL.
	@param	kb	Key data.
	@param	ks	Key size.
	@param	vb	Value data.
	@param	vs	Value size.
	@return	1 on success, 0 on error (can continue), -1 on error (abort).
*/
static
int
dk4dbi_wc_internal_traverse(
  void		*obj,
  const void	*kb,
  size_t	 ks,
  const void	*vb,
  size_t	 vs
)
{
  dk4dbi_wc_traversal_object_t	*myobj;	/* Passed from dk4dbi_traverse() */
  const wchar_t			*pk;	/* Key pointer */
  const wchar_t			*pv;	/* Value pointer */
  int				 back	= 0;

  if ((NULL != obj) && (NULL != kb) && (NULL != vb)) {
    if ((0 == (ks % sizeof(wchar_t))) && (0 == (vs % sizeof(wchar_t)))) {
      ks = ks / sizeof(wchar_t);
      vs = vs / sizeof(wchar_t);
      if ((0 < ks) && (0 < vs)) {
	pk = (const wchar_t *)kb;
	pv = (const wchar_t *)vb;
	if (('\0' == pk[ks - 1]) && ('\0' == pv[vs - 1])) {
	  myobj = (dk4dbi_wc_traversal_object_t *)obj;
	  back = (*(myobj->fct))(myobj->obj, pk, pv);
	}
      }
    }
  }
  return back;
}


int
dk4dbi_wc_traverse(
  dk4_dbi_t			*db,
  void				*obj,
  dk4dbi_wc_traverse_fct_t	*fct
)
{
  dk4dbi_wc_traversal_object_t	 myobj;		/* Passed to dk4dbi_traverse */
  int				 back	= -1;

  if ((NULL != db) && (NULL != fct)) {
    myobj.obj = obj;
    myobj.fct = fct;
    back = dk4dbi_traverse(db, &myobj, dk4dbi_wc_internal_traverse);
  }
  return back;
}