/* Copyright 1994 NEC Corporation, Tokyo, Japan.
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without
 * fee, provided that the above copyright notice appear in all copies
 * and that both that copyright notice and this permission notice
 * appear in supporting documentation, and that the name of NEC
 * Corporation not be used in advertising or publicity pertaining to
 * distribution of the software without specific, written prior
 * permission.  NEC Corporation makes no representations about the
 * suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * NEC CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN 
 * NO EVENT SHALL NEC CORPORATION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF 
 * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR 
 * OTHER TORTUOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 
 * PERFORMANCE OF THIS SOFTWARE. 
 */

#if !defined(lint) && !defined(__CODECENTER__)
static char rcsid[]="$Id: context.c,v 1.5 2003/09/17 08:50:52 aida_s Exp $";
#endif
/*LINTLIBRARY*/

#include "RKintern.h"
#include "patchlevel.h"
#include <canna/jrkanji.h>

#include <errno.h>

static unsigned long now_context = 0L;

#define	Calloc		calloc
#define cx_gwt		cx_extdata.ptr
#define	STRCMP(d, s)	strcmp((char *)(d), (char *)(s))

struct RkGram SG;
struct RkParam SX;

/* RkInitialize: Renbunsetsu Henkan shokika
 *	subeteno Renbunsetsu henkan kannsuu wo siyou suru maeni
 *      itido dake call suru koto.
 * returns: -1/0
 */
static struct RkContext	*CX;

#ifdef MMAP
/* If you compile with Visual C++, then please comment out the next 3 lines. */
#include <sys/types.h>  /* mmap */
#include <sys/mman.h>   /* mmap */
#include <fcntl.h>      /* mmap */
int fd_dic = -1;        /* mmap */
#endif

#ifdef WINDOWS_STYLE_FILENAME
#define DEFAULTGRAMDIC "/canna/fuzokugo.cbd"
#endif

#ifndef DEFAULTGRAMDIC
#define DEFAULTGRAMDIC "/canna/fuzokugo.d"
#endif

static int	
_RkInitialize(ddhome, numCache)
     char	*ddhome;
     int	numCache;
{
  int			i = strlen(ddhome);
  struct RkParam	*sx = &SX;
  struct DD		*dd = &sx->dd;
  char			*gramdic, *path;
  int con;
#ifdef __EMX__
  struct stat		statbuf;
#endif

#ifdef MMAP
  if((fd_dic == -1) && (fd_dic = open("/dev/zero", O_RDWR)) < 0) {
    con = -1;
    goto return_con;
  }
#endif

  if (sx->flag & SX_INITED) {
    con = -1;
    goto return_con;
  }

  gramdic = malloc(strlen(DEFAULTGRAMDIC) + i + 1);
  if (gramdic) {
    strcpy(gramdic, ddhome);
    strcat(gramdic, DEFAULTGRAMDIC);
    SG.gramdic = RkOpenGram(gramdic);
    (void)free(gramdic);
    if (SG.gramdic) {
      /* confirm user/ and group/ directory */
      path = malloc(strlen(ddhome) + strlen(USER_DIC_DIR) + 2);
      if (path) {
	strcpy(path, ddhome);
	strcat(path, "/");
	strcat(path, USER_DIC_DIR);
	if (mkdir(path, MKDIR_MODE) < 0 &&
	    errno != EEXIST) {
	  free(path);
	}
	else {
	  free(path);

	  path = malloc(strlen(ddhome) + strlen(GROUP_DIC_DIR) + 2);
	  if (path) {
	    strcpy(path, ddhome);
	    strcat(path, "/");
	    strcat(path, GROUP_DIC_DIR);
	    if (mkdir(path, MKDIR_MODE) < 0 &&
		errno != EEXIST) {
	      free(path);
	    }
	    else {
	      free(path);

	      sx->word = (struct nword *)0;
	      dd->dd_next = dd->dd_prev = dd;
	      sx->ddhome = allocStr(ddhome);
	      if (sx->ddhome) {
		SG.P_BB  = RkGetGramNum(SG.gramdic, "BB");
		SG.P_NN  = RkGetGramNum(SG.gramdic, "NN");
		SG.P_T00 = RkGetGramNum(SG.gramdic, "T00");
		SG.P_T30 = RkGetGramNum(SG.gramdic, "T30");
		SG.P_T35 = RkGetGramNum(SG.gramdic, "T35");
#ifdef LOGIC_HACK
		SG.P_KJ  = RkGetGramNum(SG.gramdic, "KJ");
#endif
		SG.P_Ftte  = RkGetGramNum(SG.gramdic, "Ftte");
		CX = (struct RkContext *)
		  Calloc(INIT_CONTEXT, sizeof(struct RkContext));
		if (CX) {
		  now_context += INIT_CONTEXT;
		  if (_RkInitializeCache(numCache) == 0) {
		    sx->ddpath = _RkCreateDDP(SYSTEM_DDHOME_NAME);
		    if (sx->ddpath) {
		      con = RkwCreateContext();
		      if (con >= 0) {
			sx->flag |= SX_INITED;
			goto return_con;
		      }
		      _RkFreeDDP(sx->ddpath);
		      sx->ddpath = (struct DD **)0;
		    }
		    _RkFinalizeCache();
		  }
		  free((char *)CX);
		  now_context = 0L;
		}
		free(sx->ddhome);
	      }
	    }
	  }
	}
      }
      RkCloseGram(SG.gramdic);
    }
  }
  con = -1;
 return_con:
  return con;
}

int
RkwInitialize(ddhome)
     char	*ddhome;
{
  /*
   * Word:	????
   * Cache:	36B*512 	= 20KB
   * Heap:	30*1024B	= 30KB
   */
  return(ddhome ? _RkInitialize(ddhome, 512*10) : -1);
}

/* RkFinalize: Renbunsetu henkan shuuryou shori
 *
 */
static void
_RkFinalizeWord()		/* finalize free word list */
{
  struct nword	*w, *t;
  
  /* dispose each page in list */
  for (w = SX.page; w; w = t) {
    t = w->nw_next;
    (void)free((char *)w);
  } 
  SX.word = (struct nword *)0;
  SX.page = (struct nword *)0;
  SX.word_in_use = 0;
  SX.page_in_use = 0;
}

void
RkwFinalize()
{
  struct RkParam	*sx = &SX;
  int	i;

  /* already initialized */
  if (!(sx->flag & SX_INITED))
    return;
  /* houchi sareta context wo close */
  for(i = 0; (unsigned long)i < now_context; i++)
    if (IS_LIVECTX(&CX[i]))
      RkwCloseContext(i);
  (void)free((char *)CX);
  now_context = 0L;
  /* sonohoka no shuuryou shori */
  _RkFinalizeWord();
  _RkFinalizeCache();
  (void)free((char *)sx->ddhome);
  sx->ddhome = (char *)0;
  _RkFreeDDP(sx->ddpath);
  RkCloseGram(SG.gramdic);
  sx->flag &= ~SX_INITED;

#ifdef MMAP
  close(fd_dic);
  fd_dic = -1;
#endif

  return;
}

/* RkGetSystem: System heno pointer wo motomeru
 */
struct RkParam	*
RkGetSystem()
{
  return(&SX);
}

/* RkGetSystemDD: System heno pointer wo motomeru
 */
struct DD	*
RkGetSystemDD()
{
  struct RkParam	*sx;
  return(((sx = RkGetSystem()) && sx->ddpath) ? sx->ddpath[0] : (struct DD *)0);
}

/* RkGetContext: Context heno pointer wo motomeru
 *	-> RKintern.h
 */
struct RkContext *
RkGetContext(cx_num)
     int	cx_num;
{
  return(IsLiveCxNum(cx_num) ? &CX[cx_num] : (struct RkContext *)0);
}

struct RkContext *
RkGetXContext(cx_num)
     int	cx_num;
{
  struct RkContext	*cx;
  
  cx = RkGetContext(cx_num);
  if (cx)
    if (!IS_XFERCTX(cx))
      cx = (struct RkContext *)0;
  return(cx);
}

void	
_RkEndBun(cx)
struct RkContext	*cx;
{
    struct DD	**ddp = cx->ddpath;
    int		c;

    cx->flags &= ~(CTX_XFER|CTX_XAUT);
    cx->concmode &= ~(RK_CONNECT_WORD | RK_MAKE_WORD |
		      RK_MAKE_KANSUUJI | RK_MAKE_EISUUJI);
    for (c = 0; c < 4; c++) {
	struct MD	*head, *md, *nd;

	head = cx->md[c];
	for (md = head->md_next; md != head; md = nd) {
	    struct DM 	*dm = md->md_dic;
	    struct DF	*df = dm->dm_file;
	    struct DD	*dd = df->df_direct;

	    nd = md->md_next;
	    if (md->md_flags & MD_MPEND) 	/* release pending */
		md->md_flags &= ~MD_MPEND;
	    if (md->md_flags & MD_UPEND) 	/* unmount pending */
		_RkUmountMD(cx, md);
	    else
	    if (!_RkIsInDDP(ddp, dd)) 		/* unreachable */
		_RkUmountMD(cx, md);
	};
    };
}

/* RkSetDicPath
 *
 */

int
RkwSetDicPath(cx_num, path)
     int	cx_num;
     char	*path;
{
  struct RkContext	*cx = RkGetContext(cx_num);
  struct DD		**new;
 
  new = _RkCreateDDP(path);
  if (new) {
    _RkFreeDDP(cx->ddpath);
    cx->ddpath = new;
    return(0);
  };
  return(-1);
}

/*
  fillContext -- コンテクスト構造体の決まったところに値を埋めてやる。

  return value:
    0 OK
   -1 ダメ
 */

static int
fillContext(cx_num)
int cx_num;
{
  struct RkContext *cx = &CX[cx_num];
  int i;

  /* create mount list headers */
  for (i = 0; i < 4; i++) {
    struct MD *mh;
    
    if (!(mh = (struct MD *)Calloc(1, sizeof(struct MD)))) {
      int j;

      for (j = 0 ; j < i; j++) {
	free((char *)cx->md[i]);
      }
      return -1;
    }
    mh->md_next = mh->md_prev = mh;
    mh->md_dic = (struct DM *)0;
    mh->md_flags = 0;
    cx->md[i] = mh;
  }
  cx->dmprev = (struct DM *)0;
  cx->qmprev = (struct DM *)0;
  cx->nv = (struct NV *)0;
  cx->ddpath = (struct DD **)0;
  cx->kouhomode = (unsigned long)0;
  cx->concmode = 0;
  cx->litmode = (unsigned long *)Calloc(MAXLIT, sizeof(unsigned long));
  cx->gram = &SG;
  if (cx->litmode) {
    for (i = 0; i < MAXLIT; i++) {
      cx->litmode[i] = 0x87654321;
    }
    cx->poss_cont = 0;
#ifdef EXTENSION_NEW
    cx->cx_gwt = (pointer)Calloc(1, sizeof(struct _rec));
    if (cx->cx_gwt) {
      struct _rec	*gwt = (struct _rec *)cx->cx_gwt;
      gwt->gwt_cx = -1;  /* means no GetWordTextdic context
			    is available */
      gwt->gwt_dicname = (unsigned char *)0;
      cx->flags = CTX_LIVE | CTX_NODIC;
      return 0;
    }
    free((char *)cx->litmode);
#else
    cx->flags = CTX_LIVE | CTX_NODIC;
    return 0;
#endif
  }
  return -1;
}

int
RkwCreateContext()
{
  int	cx_num, i;
  struct RkContext *newcx;
    
  /* saisho no aki context wo mitsukeru */
  for(cx_num = 0; cx_num < (int)now_context; cx_num++) {
    if(!CX[cx_num].flags) {
      /* create mount list headers */
      if (fillContext(cx_num) == 0) {
	return cx_num;
      }
    }
  }
  newcx = (RkContext *)realloc(CX, (size_t) sizeof(RkContext)
			       * (now_context+ADD_CONTEXT));
  if (newcx) {
    CX = newcx;
    for (i = now_context ; i < (int)now_context + ADD_CONTEXT ; i++) {
      CX[i].flags = (unsigned)0;
    }
    cx_num = now_context;
    now_context += ADD_CONTEXT;
    if (fillContext(cx_num) == 0) {
      return cx_num;
    }
  }
  return(-1);
}

int
RkwCloseContext(cx_num)
     int	cx_num;
{
  struct RkContext	*cx;
  int				i;

  if (!(cx  = RkGetContext(cx_num)))
    return(-1);
/* terminate bunsetu henkan */
  if (IS_XFERCTX(cx))
    RkwEndBun(cx_num, 0);
  _RkFreeDDP(cx->ddpath);
  cx->ddpath = (struct DD **)0;
  /* subete no jisho wo MD suru */
  for (i = 0; i < 4; i++) {
    struct MD	*mh, *m, *n;
    
    /* destroy mount list */
    mh = cx->md[i];
    if (mh) {
      for (m = mh->md_next; m != mh; m = n) {
	n = m->md_next;
	(void)_RkUmountMD(cx, m);
      };
      (void)free((char *)mh);
      cx->md[i] = (struct MD *)0;
    };
  };
  cx->dmprev = (struct DM *)0;
  cx->qmprev = (struct DM *)0;
  /* convertion table */
  if (cx->litmode) {
    (void)free((char *)cx->litmode);
    cx->litmode = (unsigned long *)0;
  }
  cx->flags = 0;

  /* free grammatical dictionary */
  cx->gram->refcount--;
  if (cx->gram->refcount == 0 && cx->gram != &SG) {
    RkCloseGram(cx->gram->gramdic);
    free((char *)cx->gram);
  }
  cx->gram = (struct RkGram *)0;

#ifdef EXTENSION_NEW
  if (cx->cx_gwt) {
    struct _rec	*gwt = (struct _rec *)cx->cx_gwt;
    if (gwt) {
      (void)RkwCloseContext(gwt->gwt_cx);
      if (gwt->gwt_dicname)
	(void)free((char *)gwt->gwt_dicname);
      (void)free((char *)gwt);
    };
    cx->cx_gwt = (pointer)0;
  };
  freeTdn(cx);
#endif
  return 0;
}
/* RkDuplicateContext
 *	onaji naiyou no context wo sakuseisuru
 */
int RkwDuplicateContext pro((int));

int
RkwDuplicateContext(cx_num)
     int	cx_num;
{
  struct RkContext	*sx;
  int			dup = -1;

  dup = RkwCreateContext();
  if (dup >= 0) {
    int		i;
    struct RkContext	*dx;
    
    sx  = RkGetContext(cx_num);
    if (sx) {
      dx = RkGetContext(dup);

      /* use the same grammatical information */
      dx->gram = sx->gram;
      dx->gram->refcount++;
      if (!(sx->flags & CTX_NODIC)) {
	dx->flags &= ~CTX_NODIC;
      }
      
      /* copy the mount list */
      for (i = 0; i < 4; i++) {
	struct MD	*mh, *md;
	
	/* should mount dictionaries in reverse order */
	mh = sx->md[i];
	for (md = mh->md_prev; md != mh; md = md->md_prev) 
	  (void)_RkMountMD(dx, md->md_dic, md->md_freq,
			   md->md_flags & MD_WRITE, 0);
      };
      dx->ddpath = _RkCopyDDP(sx->ddpath);
      if (sx->litmode && dx->litmode) 
	for (i = 0; i < MAXLIT; i++)
	  dx->litmode[i] = sx->litmode[i];
    } else {
      RkwCloseContext(dup);
      return -1;
    }
  }
  return(dup);
}

/* RkMountDic: append the specified dictionary at the end of the mount list */
int
RkwMountDic(cx_num, name, mode)
     int	cx_num;		/* context specified */
     char	*name;		/* the name of dictonary */
     int	mode;		/* mount mode */
{
  struct RkContext	*cx;
  int firsttime;

  if (!name)
    return(-1);
  cx = RkGetContext(cx_num);
  if (cx) {
    struct DM *dm, *qm;

    firsttime = (cx->flags & CTX_NODIC) ? 1 : 0;
    if (firsttime) { /* 最初にマウント*しようと*したら降ろす */
      cx->flags &= ~CTX_NODIC;
    }

    dm = _RkSearchDicWithFreq(cx->ddpath, name, &qm);
    if (dm) {
      struct MD	*mh = cx->md[dm->dm_class];
      struct MD	*md, *nd;
      int		count = 0;
      
      /* search the dictionary */
      for (md = mh->md_next; md != mh; md = nd) {
	nd = md->md_next;
	if (md->md_dic == dm) {	/* already mounted */
	  /* cancel the previous unmount */
	  if (md->md_flags & MD_UPEND)
	    md->md_flags &= ~MD_UPEND;
	  count++;
	};
      };
      if (!count) {
	return _RkMountMD(cx, dm, qm, mode, firsttime);
      }
    }
  }
  return(-1);
}
/* RkUnmountDic: removes the specified dictionary from the mount list */
int
RkwUnmountDic(cx_num, name)
     int	cx_num;
     char	*name;
{
  struct RkContext	*cx;
  int			i;

  if (!name)
    return(-1);
  cx = RkGetContext(cx_num);
  if (cx) {
    for (i = 0; i < 4; i++)  {
      struct MD	*mh = cx->md[i];
      struct MD	*md, *nd;
      
      for (md = mh->md_next; md != mh; md = nd) {
	struct DM	*dm = md->md_dic;
	char *ename;

	ename = md->md_freq ? md->md_freq->dm_nickname : dm->dm_nickname;
	nd = md->md_next;
	if (!STRCMP(ename, name)) {
	  _RkUmountMD(cx, md);
	}
      }
    }
    return(0);
  }
  return(-1);
}

/* RkRemountDic: relocate the specified dictionary among the mount list */
int
RkwRemountDic(cx_num, name, mode)
     int	cx_num;		/* context specified */
     char	*name;		/* the name of dictonary */
     int	mode;		/* mount mode */
{
  struct RkContext	*cx;
  int			i, isfound = 0;
  char *ename;

  if (!name)
    return(-1);
  cx = RkGetContext(cx_num);
  if (cx) {
    for (i = 0; i < 4; i++) {
      struct MD	*mh = cx->md[i];
      struct MD	*md, *pd;
      
      /* do in reverse order */
      for (md = mh->md_prev; md != mh; md = pd) {
	struct DM	*dm = md->md_dic;

	ename = md->md_freq ? md->md_freq->dm_nickname : dm->dm_nickname;
	pd = md->md_prev;
	if (!STRCMP(ename, name)) {
	  /* remove from mount list */
	  md->md_prev->md_next = md->md_next;
	  md->md_next->md_prev = md->md_prev;
	  /* insert according to the mode */
	  if (!mode) {    /* sentou he */
	    md->md_next = mh->md_next;
	    md->md_prev = mh;
	    mh->md_next->md_prev = md;
	    mh->md_next = md;
	  } else {          /* saigo he */
	    md->md_next = mh;
	    md->md_prev = mh->md_prev;
	    mh->md_prev->md_next = md;
	    mh->md_prev = md;
	  };
	  isfound++;
	};
      };
    };
    if (isfound)
      return(0);
  };
  return(-1);
}

/* RkGetDicList: collects the names of the mounted dictionaies */
int
RkwGetMountList(cx_num, mdname, maxmdname)
     int	cx_num;
     char	*mdname;
     int	maxmdname;
{
  struct RkContext	*cx;
  struct MD		*mh, *md;
  int			p, i, j;
  int			count = -1;
  
  cx  = RkGetContext(cx_num);
  if (cx) {
    i = count = 0;
    for (p = 0; p < 4; p++) {
      mh = cx->md[p];
      for (md = mh->md_next; md != mh; md = md->md_next) {
	struct DM	*dm = md->md_dic;
	char *name;
	
	if (md->md_flags & (MD_MPEND|MD_UPEND)) {
	  continue;
	};
	name = md->md_freq ? md->md_freq->dm_nickname : dm->dm_nickname;
	j = i + strlen(name) + 1;
	if (j + 1 < maxmdname) {
	  if (mdname) {
	    (void)strcpy(mdname + i, name);
	  }
	  i = j;
	  count++;
	};
      };
    };
    if (i + 1 < maxmdname && mdname)
      mdname[i++] = (char)0;
  };
  return(count);
}

/* RkGetDicList: collects the names of dictionary */

struct dics {
  char *nickname, *dicname;
  int dictype;
};

static int diccmp pro((const struct dics *, const struct dics *));

static int
diccmp(a, b)
const struct dics *a, *b;
{
  int res;

  res = strcmp(a->nickname, b->nickname);
  if (res == 0) {
    res = strcmp(a->dicname, b->dicname);
    if (res == 0) {
      if (a->dictype == b->dictype) {
	res = 0;
      }
      else if (a->dictype == DF_FREQDIC) {
	res = -1;
      }
      else if (b->dictype == DF_FREQDIC) {
	res = 1;
      }
      else if (a->dictype == DF_PERMDIC) {
	res = -1;
      }
      else if (b->dictype == DF_PERMDIC) {
	res = 1;
      }
      else {
	res = 0;
      }
    }
  }
  return res;
}

int
RkwGetDicList(cx_num, mdname, maxmdname)
     int	cx_num;
     char	*mdname;
     int	maxmdname;
{
  struct RkContext	*cx;
  struct DD   		**ddp, *dd;
  struct DF   		*df, *fh;
  struct DM  		*dm, *mh;
  int			i, j, k, n;
  int			count = -1;
  struct dics *diclist;

  /* まず数を数える */
  if ((cx  = RkGetContext(cx_num)) && (ddp = cx->ddpath)) {
    count = 0;
    for (i = 0; (dd = ddp[i]) != (struct DD *)0 ; i++) {
      fh = &dd->dd_files;
      for (df = fh->df_next; df != fh; df = df->df_next) {
	mh = &df->df_members;
	for (dm = mh->dm_next; dm != mh; dm = dm->dm_next) {
	  count++;
	}
      }
    }
    /* 辞書リストの配列を malloc する */
    diclist = (struct dics *)malloc(count * sizeof(struct dics));
    if (diclist) {
      struct dics *dicp = diclist, *prevdicp = (struct dics *)0;

      for (i = 0 ; (dd = ddp[i]) != (struct DD *)0 ; i++) {
	fh = &dd->dd_files;
	for (df = fh->df_next; df != fh; df = df->df_next) {
	  mh = &df->df_members;
	  for (dm = mh->dm_next; dm != mh; dm = dm->dm_next) {
	    dicp->nickname = dm->dm_nickname;
	    dicp->dicname = dm->dm_dicname;
	    dicp->dictype = df->df_type;
	    dicp++;
	  }
	}
      }
      qsort(diclist, count, sizeof(struct dics), 
	    (int (*) pro((const void *, const void *)))diccmp);

      n = count;
      for (i = j = 0, dicp = diclist ; i < n ; i++, dicp++) {
	if (prevdicp && !strcmp(prevdicp->nickname, dicp->nickname)) {
	  /* prev と今の辞書とで nickname が一致している場合 */
	  count--;
	}
	else {
	  k = j + strlen(dicp->nickname) + 1;
	  if (k + 1 < maxmdname) {
	    if (mdname) {
	      (void)strcpy(mdname + j, dicp->nickname);
	      j = k;
	    }
	  }
	  prevdicp = dicp;
	}
      }
      if (j + 1 < maxmdname && mdname) {
	mdname[j++] = 0;
      }
      free((char *)diclist);
    }
    else {
      count = -1; /* やっぱり正確な数が分からなかった */
    }
  }
  return(count);
}

/* RkGetDirList: collects the names of directories */
int
RkwGetDirList(cx_num, ddname, maxddname)
     int	cx_num;
     char	*ddname;
     int	maxddname;
{
  struct RkContext	*cx;
  struct DD   		**ddp, *dd;
  int			p, i, j;
  int			count = -1;

  if ((cx  = RkGetContext(cx_num)) && (ddp = cx->ddpath)) {
    i = count = 0;
    for (p = 0; (dd = ddp[p]) != (struct DD *)0 ; p++) {
      j = i + strlen(dd->dd_name) + 1;
      if (j + 1 < maxddname) {
	if (ddname)
	  (void)strcpy(ddname + i, dd->dd_name);
	i = j;
	count++;
      };
    };
    if (i + 1 < maxddname && ddname)
      ddname[i++] = (char)0;
  };
  return(count);
}

/* RkDefineDic
 *	mount the dictionary onto the specified context.
 */
int
RkwDefineDic(cx_num, name, word)
     int	cx_num;
     char	*name;
     Wchar	*word;
{
  struct RkContext	*cx;
  int			i;

  if ((cx = RkGetContext(cx_num)) && word && name) {
    char        *prevname = (char *)0;

    if (cx->dmprev)
      prevname = cx->dmprev->dm_nickname;
    if (cx->qmprev)
      prevname = cx->qmprev->dm_nickname;
    
    if (prevname && !STRCMP(prevname, name))
      return(DST_CTL(cx->dmprev, cx->qmprev, DST_DoDefine, word,
		     cx->gram->gramdic));
    else {
      for (i = 0; i < 4; i++)  {
	struct MD	*mh = cx->md[i];
	struct MD	*md, *nd;
	
	for (md = mh->md_next; md != mh; md = nd) {
	  struct DM	*dm = md->md_dic;
	  struct DM	*qm = md->md_freq;
	  char          *dname = (char *)0;

	  if (dm)
	    dname = dm->dm_nickname;
	  if (qm)
	    dname = qm->dm_nickname;
	  
	  if (dname) {
	    if (!STRCMP(dname, name)) {
	      cx->dmprev = dm;
	      cx->qmprev = qm;
	      return(DST_CTL(dm, qm, DST_DoDefine, word, cx->gram->gramdic));
	    }
	  }
	  nd = md->md_next;
	}
      }
    }
  }
  return(-1);
}


/* RkDeleteDic
 *	mount the dictionary onto the specified context.
 */
int
RkwDeleteDic(cx_num, name, word)
     int	cx_num;
     char	*name;
     Wchar	*word;
{
  struct RkContext	*cx;
  int			i;
  
  if ((cx = RkGetContext(cx_num)) && name) {
    char        *prevname = (char *)0;
    
    if (cx->dmprev)
      prevname = cx->dmprev->dm_nickname;
    if (cx->qmprev)
      prevname = cx->qmprev->dm_nickname;

    if (prevname && !STRCMP(prevname, name))
      return(DST_CTL(cx->dmprev, cx->qmprev, DST_DoDelete, word, 
		     cx->gram->gramdic));
    else {
      for (i = 0; i < 4; i++)  {
	struct MD	*mh = cx->md[i];
	struct MD	*md, *nd;
	
	for (md = mh->md_next; md != mh; md = nd) {
	  struct DM	*dm = md->md_dic;
	  struct DM	*qm = md->md_freq;
	  char          *dname = (char *)0;

	  if (dm)
	    dname = dm->dm_nickname;
	  if (qm)
	    dname = qm->dm_nickname;
	  
	  if (dname) {
	    if (!STRCMP(dname, name)) {
	      cx->dmprev = dm;
	      cx->qmprev = qm;
	      return(DST_CTL(dm, qm, DST_DoDelete, word, cx->gram->gramdic));
	    }
	  }
	  nd = md->md_next;
	}
      }
    }
  }
  return(-1);
}

#ifdef STANDALONE /* The following code is as simulating the code in
 lib/RKC API.  In case STANDALONE, it becomes possible for libRK to be
 linked with libcanna directly. */

int RkwSetAppName pro((int, char *));

int
RkwSetAppName(Context, name)
int Context;
char *name;
{
  return 0;
}

char *RkwGetServerName pro((void));

char *
RkwGetServerName()
{
  return (char *)NULL;
}

int RkwGetProtocolVersion pro((int *, int *));

int
RkwGetProtocolVersion(majorp, minorp)
int *majorp, *minorp;
{
    *majorp = CANNA_MAJOR_MINOR / 1000;
    *minorp = CANNA_MAJOR_MINOR % 1000;
    return 0;
}

int RkwGetServerVersion(int *, int *);

int
RkwGetServerVersion(majorp, minorp)
int *majorp, *minorp;
{
  *majorp = CANNA_MAJOR_MINOR / 1000;
  *minorp = CANNA_MAJOR_MINOR % 1000;
  return 0;
}

int
RkwSetUserInfo(user, group, topdir)
char *user, *group, *topdir;
{
  return 1;
}

#endif /* STANDALONE */
