/* $Id: zebraapi.c,v 1.114 2003/09/05 10:51:17 adam Exp $
   Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003
   Index Data Aps

This file is part of the Zebra server.

Zebra is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.

Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with Zebra; see the file LICENSE.zebra.  If not, write to the
Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
*/

#include <assert.h>
#include <stdio.h>
#ifdef WIN32
#include <io.h>
#include <process.h>
#include <direct.h>
#else
#include <unistd.h>
#endif

#include <yaz/diagbib1.h>
#include <yaz/pquery.h>
#include <yaz/sortspec.h>
#include "index.h"
#include <charmap.h>
#include "zebraapi.h"

/* simple asserts to validate the most essential input args */
#define ASSERTZH assert(zh && zh->service)
#define ASSERTZHRES assert(zh && zh->service && zh->res)
#define ASSERTZS assert(zs)

/* A simple log macro */
/* don't break with older yazen that lack log_app2 */
#ifdef LOG_APP2
#define LOG_API LOG_APP2
#else
#define LOG_API LOG_DEBUG
#endif

static Res zebra_open_res (ZebraHandle zh);
static void zebra_close_res (ZebraHandle zh);


static void zebra_chdir (ZebraService zs)
{
    const char *dir ;
    ASSERTZS;
    yaz_log(LOG_API,"zebra_chdir");
    dir = res_get (zs->global_res, "chdir");
    if (!dir)
	return;
    logf (LOG_DEBUG, "chdir %s", dir);
#ifdef WIN32
    _chdir(dir);
#else
    chdir (dir);
#endif
}

static void zebra_flush_reg (ZebraHandle zh)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_flush_reg");
    zh->errCode=0;
    zebraExplain_flush (zh->reg->zei, zh);
    
    extract_flushWriteKeys (zh);
    zebra_index_merge (zh);
}

static struct zebra_register *zebra_register_open (ZebraService zs, 
                                                   const char *name,
                                                   int rw, int useshadow,
                                                   Res res,
                                                   const char *reg_path);
static void zebra_register_close (ZebraService zs, struct zebra_register *reg);

ZebraHandle zebra_open (ZebraService zs)
{
    ZebraHandle zh;
    const char *default_encoding;
    ASSERTZS;
    yaz_log(LOG_API,"zebra_open");

    if (!zs)
        return 0;

    zh = (ZebraHandle) xmalloc (sizeof(*zh));
    yaz_log (LOG_DEBUG, "zebra_open zs=%p returns %p", zs, zh);

    zh->service = zs;
    zh->reg = 0;          /* no register attached yet */
    zh->sets = 0;
    zh->destroyed = 0;
    zh->errCode = 0;
    zh->errString = 0;
    zh->res = 0; 

    zh->reg_name = xstrdup ("");
    zh->path_reg = 0;
    zh->num_basenames = 0;
    zh->basenames = 0;

    zh->trans_no = 0;
    zh->trans_w_no = 0;

    zh->lock_normal = 0;
    zh->lock_shadow = 0;

    zh->admin_databaseName = 0;

    zh->shadow_enable = 1;

    default_encoding = res_get_def(zs->global_res, "encoding", "ISO-8859-1");
    zh->record_encoding = xstrdup (default_encoding);

    zh->iconv_to_utf8 =
        yaz_iconv_open ("UTF-8", default_encoding);
    if (zh->iconv_to_utf8 == 0)
        yaz_log (LOG_WARN, "iconv: %s to UTF-8 unsupported",
           default_encoding);
    zh->iconv_from_utf8 =
        yaz_iconv_open (default_encoding, "UTF-8");
    if (zh->iconv_to_utf8 == 0)
        yaz_log (LOG_WARN, "iconv: UTF-8 to %s unsupported",
           default_encoding);

    zebra_mutex_cond_lock (&zs->session_lock);

    zh->next = zs->sessions;
    zs->sessions = zh;

    zebra_mutex_cond_unlock (&zs->session_lock);

    return zh;
}

ZebraService zebra_start (const char *configName)
{
    Res res;

    yaz_log(LOG_API|LOG_LOG,"zebra_start %s",configName);

    if ((res = res_open (configName, 0)))
    {
        ZebraService zh = xmalloc (sizeof(*zh));

	yaz_log (LOG_DEBUG, "Read resources `%s'", configName);
        
        zh->global_res = res;
        zh->configName = xstrdup(configName);
        zh->sessions = 0;
        
        zebra_chdir (zh);
        
        zebra_mutex_cond_init (&zh->session_lock);
        if (!res_get (zh->global_res, "passwd"))
            zh->passwd_db = NULL;
        else
        {
            zh->passwd_db = passwd_db_open ();
            if (!zh->passwd_db)
                logf (LOG_WARN|LOG_ERRNO, "passwd_db_open failed");
            else
                passwd_db_file (zh->passwd_db,
                                res_get (zh->global_res, "passwd"));
        }
        zh->path_root = res_get (zh->global_res, "root");
        return zh;
    }
    return 0;
}


void zebra_pidfname(ZebraService zs, char *path)
{
    zebra_lock_prefix (zs->global_res, path);
    strcat(path, "zebrasrv.pid");
}

static
struct zebra_register *zebra_register_open (ZebraService zs, const char *name,
                                            int rw, int useshadow, Res res,
                                            const char *reg_path)
{
    struct zebra_register *reg;
    int record_compression = REC_COMPRESS_NONE;
    char *recordCompression = 0;

    ASSERTZS;
    
    reg = xmalloc (sizeof(*reg));

    assert (name);
    reg->name = xstrdup (name);

    reg->seqno = 0;
    reg->last_val = 0;

    assert (res);

    yaz_log (LOG_LOG|LOG_API, "zebra_register_open rw = %d useshadow=%d p=%p,n=%s,rp=%s",
             rw, useshadow, reg, name, reg_path ? reg_path : "(none)");
    
    reg->dh = data1_createx (DATA1_FLAG_XML);
    if (!reg->dh)
        return 0;
    reg->bfs = bfs_create (res_get (res, "register"), reg_path);
    if (!reg->bfs)
    {
        data1_destroy(reg->dh);
        return 0;
    }
    if (useshadow)
        bf_cache (reg->bfs, res_get (res, "shadow"));
    data1_set_tabpath (reg->dh, res_get_def(res, "profilePath",
                                            DEFAULT_PROFILE_PATH));
    data1_set_tabroot (reg->dh, reg_path);
    reg->recTypes = recTypes_init (reg->dh);
    recTypes_default_handlers (reg->recTypes);

    reg->zebra_maps = zebra_maps_open (res, reg_path);
    reg->rank_classes = NULL;

    reg->key_buf = 0;

    reg->keys.buf_max = 0;
    reg->keys.buf = 0;
    reg->sortKeys.buf = 0;
    reg->sortKeys.buf_max = 0;

    reg->records = 0;
    reg->dict = 0;
    reg->sortIdx = 0;
    reg->isams = 0;
    reg->matchDict = 0;
    reg->isam = 0;
    reg->isamc = 0;
    reg->isamd = 0;
    reg->isamb = 0;
    reg->zei = 0;
    reg->matchDict = 0;
    reg->key_file_no = 0;
    
    zebraRankInstall (reg, rank1_class);
    zebraRankInstall (reg, rankzv_class);
    zebraRankInstall (reg, rankliv_class);

    recordCompression = res_get_def (res, "recordCompression", "none");
    if (!strcmp (recordCompression, "none"))
	record_compression = REC_COMPRESS_NONE;
    if (!strcmp (recordCompression, "bzip2"))
	record_compression = REC_COMPRESS_BZIP2;

    if (!(reg->records = rec_open (reg->bfs, rw, record_compression)))
    {
	logf (LOG_WARN, "rec_open");
	return 0;
    }
    if (rw)
    {
        reg->matchDict = dict_open (reg->bfs, GMATCH_DICT, 20, 1, 0);
    }
    if (!(reg->dict = dict_open (reg->bfs, FNAME_DICT, 40, rw, 0)))
    {
	logf (LOG_WARN, "dict_open");
	return 0;
    }
    if (!(reg->sortIdx = sortIdx_open (reg->bfs, rw)))
    {
	logf (LOG_WARN, "sortIdx_open");
	return 0;
    }
    if (res_get_match (res, "isam", "s", ISAM_DEFAULT))
    {
	struct ISAMS_M_s isams_m;
	if (!(reg->isams = isams_open (reg->bfs, FNAME_ISAMS, rw,
				      key_isams_m(res, &isams_m))))
	{
	    logf (LOG_WARN, "isams_open");
	    return 0;
	}
    }
    if (res_get_match (res, "isam", "i", ISAM_DEFAULT))
    {
	if (!(reg->isam = is_open (reg->bfs, FNAME_ISAM, key_compare, rw,
				  sizeof (struct it_key), res)))
	{
	    logf (LOG_WARN, "is_open");
	    return 0;
	}
    }
    if (res_get_match (res, "isam", "c", ISAM_DEFAULT))
    {
	struct ISAMC_M_s isamc_m;
	if (!(reg->isamc = isc_open (reg->bfs, FNAME_ISAMC,
				    rw, key_isamc_m(res, &isamc_m))))
	{
	    logf (LOG_WARN, "isc_open");
	    return 0;
	}
    }
    if (res_get_match (res, "isam", "d", ISAM_DEFAULT))
    {
	struct ISAMD_M_s isamd_m;
	
	if (!(reg->isamd = isamd_open (reg->bfs, FNAME_ISAMD,
				      rw, key_isamd_m(res, &isamd_m))))
	{
	    logf (LOG_WARN, "isamd_open");
	    return 0;
	}
    }
    if (res_get_match (res, "isam", "b", ISAM_DEFAULT))
    {
	struct ISAMC_M_s isamc_m;
	
	if (!(reg->isamb = isamb_open (reg->bfs, "isamb",
                                       rw, key_isamc_m(res, &isamc_m), 0)))
	{
	    logf (LOG_WARN, "isamb_open");
	    return 0;
	}
    }
    if (res_get_match (res, "isam", "bc", ISAM_DEFAULT))
    {
	struct ISAMC_M_s isamc_m;
	
	if (!(reg->isamb = isamb_open (reg->bfs, "isamb",
                                       rw, key_isamc_m(res, &isamc_m), 1)))
	{
	    logf (LOG_WARN, "isamb_open");
	    return 0;
	}
    }
    if (res_get_match (res, "isam", "null", ISAM_DEFAULT))
    {
	struct ISAMC_M_s isamc_m;
	
	if (!(reg->isamb = isamb_open (reg->bfs, "isamb",
                                       rw, key_isamc_m(res, &isamc_m), -1)))
	{
	    logf (LOG_WARN, "isamb_open");
	    return 0;
	}
    }
    reg->zei = zebraExplain_open (reg->records, reg->dh,
                                  res, rw, reg,
                                  explain_extract);
    if (!reg->zei)
    {
	logf (LOG_WARN, "Cannot obtain EXPLAIN information");
	return 0;
    }
    reg->active = 2;
    yaz_log (LOG_DEBUG, "zebra_register_open ok p=%p", reg);
    return reg;
}

int zebra_admin_shutdown (ZebraHandle zh)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_admin_shutdown");
    zh->errCode=0;

    zebra_mutex_cond_lock (&zh->service->session_lock);
    zh->service->stop_flag = 1;
    zebra_mutex_cond_unlock (&zh->service->session_lock);
    return 0;
}

int zebra_admin_start (ZebraHandle zh)
{
    ZebraService zs;
    ASSERTZH;
    yaz_log(LOG_API,"zebra_admin_start");
    zh->errCode=0;
    zs = zh->service;
    zebra_mutex_cond_lock (&zs->session_lock);
    zebra_mutex_cond_unlock (&zs->session_lock);
    return 0;
}

static void zebra_register_close (ZebraService zs, struct zebra_register *reg)
{
    ASSERTZS;
    yaz_log(LOG_LOG|LOG_API, "zebra_register_close p=%p", reg);
    reg->stop_flag = 0;
    zebra_chdir (zs);
    if (reg->records)
    {
        zebraExplain_close (reg->zei);
        dict_close (reg->dict);
        if (reg->matchDict)
            dict_close (reg->matchDict);
	sortIdx_close (reg->sortIdx);
	if (reg->isams)
	    isams_close (reg->isams);
        if (reg->isam)
            is_close (reg->isam);
        if (reg->isamc)
            isc_close (reg->isamc);
        if (reg->isamd)
            isamd_close (reg->isamd);
        if (reg->isamb)
            isamb_close (reg->isamb);
        rec_close (&reg->records);
    }

    recTypes_destroy (reg->recTypes);
    zebra_maps_close (reg->zebra_maps);
    zebraRankDestroy (reg);
    bfs_destroy (reg->bfs);
    data1_destroy (reg->dh);

    xfree (reg->sortKeys.buf);
    xfree (reg->keys.buf);

    xfree (reg->key_buf);
    xfree (reg->name);
    xfree (reg);
}

int zebra_stop(ZebraService zs)
{
    if (!zs)
        return 0;
    yaz_log (LOG_LOG|LOG_API, "zebra_stop");

    while (zs->sessions)
    {
        zebra_close (zs->sessions);
    }
        
    zebra_mutex_cond_destroy (&zs->session_lock);

    if (zs->passwd_db)
	passwd_db_close (zs->passwd_db);

    res_close (zs->global_res);
    xfree (zs->configName);
    xfree (zs->path_root);
    xfree (zs);
    return 0;
}

int zebra_close (ZebraHandle zh)
{
    ZebraService zs;
    struct zebra_session **sp;
    int i;

    yaz_log(LOG_API,"zebra_close");
    if (!zh)
        return 0;
    ASSERTZH;
    zh->errCode=0;
    
    zs = zh->service;
    yaz_log (LOG_DEBUG, "zebra_close zh=%p", zh);
    resultSetDestroy (zh, -1, 0, 0);

    if (zh->reg)
        zebra_register_close (zh->service, zh->reg);
    zebra_close_res (zh);

    xfree (zh->record_encoding);

    for (i = 0; i < zh->num_basenames; i++)
        xfree (zh->basenames[i]);
    xfree (zh->basenames);

    if (zh->iconv_to_utf8 != 0)
        yaz_iconv_close (zh->iconv_to_utf8);
    if (zh->iconv_from_utf8 != 0)
        yaz_iconv_close (zh->iconv_from_utf8);

    xfree (zh->admin_databaseName);
    zebra_mutex_cond_lock (&zs->session_lock);
    zebra_lock_destroy (zh->lock_normal);
    zebra_lock_destroy (zh->lock_shadow);
    sp = &zs->sessions;
    while (1)
    {
	assert (*sp);
	if (*sp == zh)
	{
	    *sp = (*sp)->next;
	    break;
	}
	sp = &(*sp)->next;
    }
    zebra_mutex_cond_unlock (&zs->session_lock);
    xfree (zh->reg_name);
    zh->service=0; /* more likely to trigger an assert */
    xfree (zh);
    return 0;
}

struct map_baseinfo {
    ZebraHandle zh;
    NMEM mem;
    int num_bases;
    char **basenames;
    int new_num_bases;
    char **new_basenames;
    int new_num_max;
};

static Res zebra_open_res (ZebraHandle zh)
{
    Res res = 0;
    char fname[512];
    ASSERTZH;
    zh->errCode=0;

    if (zh->path_reg)
    {
        sprintf (fname, "%.200s/zebra.cfg", zh->path_reg);
        res = res_open (fname, zh->service->global_res);
        if (!res)
            res = zh->service->global_res;
    }
    else if (*zh->reg_name == 0)
    {
        res = zh->service->global_res;
    }
    else
    {
        yaz_log (LOG_WARN, "no register root specified");
        return 0;  /* no path for register - fail! */
    }
    return res;
}

static void zebra_close_res (ZebraHandle zh)
{
    ASSERTZH;
    zh->errCode=0;
    if (zh->res != zh->service->global_res)
        res_close (zh->res);
    zh->res = 0;
}

static int zebra_select_register (ZebraHandle zh, const char *new_reg)
{
    ASSERTZH;
    zh->errCode=0;
    if (zh->res && strcmp (zh->reg_name, new_reg) == 0)
        return 0;
    if (!zh->res)
    {
        assert (zh->reg == 0);
        assert (*zh->reg_name == 0);
    }
    else
    {
        if (zh->reg)
        {
            resultSetInvalidate (zh);
            zebra_register_close (zh->service, zh->reg);
            zh->reg = 0;
        }
        zebra_close_res(zh);
    }
    xfree (zh->reg_name);
    zh->reg_name = xstrdup (new_reg);

    xfree (zh->path_reg);
    zh->path_reg = 0;
    if (zh->service->path_root)
    {
        zh->path_reg = xmalloc (strlen(zh->service->path_root) + 
                                strlen(zh->reg_name) + 3);
        strcpy (zh->path_reg, zh->service->path_root);
        if (*zh->reg_name)
        {
            strcat (zh->path_reg, "/");
            strcat (zh->path_reg, zh->reg_name);
        }
    }
    zh->res = zebra_open_res (zh);
    
    if (zh->lock_normal)
        zebra_lock_destroy (zh->lock_normal);
    zh->lock_normal = 0;

    if (zh->lock_shadow)
        zebra_lock_destroy (zh->lock_shadow);
    zh->lock_shadow = 0;

    if (zh->res)
    {
        char fname[512];
        const char *lock_area  =res_get (zh->res, "lockDir");
        
        if (!lock_area && zh->path_reg)
            res_put (zh->res, "lockDir", zh->path_reg);
        sprintf (fname, "norm.%s.LCK", zh->reg_name);
        zh->lock_normal =
            zebra_lock_create (res_get(zh->res, "lockDir"), fname, 0);
        
        sprintf (fname, "shadow.%s.LCK", zh->reg_name);
        zh->lock_shadow =
            zebra_lock_create (res_get(zh->res, "lockDir"), fname, 0);

    }
    return 1;
}

void map_basenames_func (void *vp, const char *name, const char *value)
{
    struct map_baseinfo *p = (struct map_baseinfo *) vp;
    int i, no;
    char fromdb[128], todb[8][128];
    
    no =
	sscanf (value, "%127s %127s %127s %127s %127s %127s %127s %127s %127s",
		fromdb,	todb[0], todb[1], todb[2], todb[3], todb[4],
		todb[5], todb[6], todb[7]);
    if (no < 2)
	return ;
    no--;
    for (i = 0; i<p->num_bases; i++)
	if (p->basenames[i] && !STRCASECMP (p->basenames[i], fromdb))
	{
	    p->basenames[i] = 0;
	    for (i = 0; i < no; i++)
	    {
		if (p->new_num_bases == p->new_num_max)
		    return;
		p->new_basenames[(p->new_num_bases)++] = 
		    nmem_strdup (p->mem, todb[i]);
	    }
	    return;
	}
}

void map_basenames (ZebraHandle zh, ODR stream,
		    int *num_bases, char ***basenames)
{
    struct map_baseinfo info;
    struct map_baseinfo *p = &info;
    int i;
    ASSERTZH;
    yaz_log(LOG_API,"map_basenames ");
    zh->errCode=0;

    info.zh = zh;
    info.num_bases = *num_bases;
    info.basenames = *basenames;
    info.new_num_max = 128;
    info.new_num_bases = 0;
    info.new_basenames = (char **)
	odr_malloc (stream, sizeof(*info.new_basenames) * info.new_num_max);
    info.mem = stream->mem;

    res_trav (zh->service->global_res, "mapdb", &info, map_basenames_func);
    
    for (i = 0; i<p->num_bases; i++)
	if (p->basenames[i] && p->new_num_bases < p->new_num_max)
	{
	    p->new_basenames[(p->new_num_bases)++] = 
		nmem_strdup (p->mem, p->basenames[i]);
	}
    *num_bases = info.new_num_bases;
    *basenames = info.new_basenames;
    for (i = 0; i<*num_bases; i++)
	logf (LOG_LOG, "base %s", (*basenames)[i]);
}

int zebra_select_database (ZebraHandle zh, const char *basename)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_select_database %s",basename);
    zh->errCode=0;
    return zebra_select_databases (zh, 1, &basename);
}

int zebra_select_databases (ZebraHandle zh, int num_bases,
                            const char **basenames)
{
    int i;
    const char *cp;
    int len = 0;
    char *new_reg = 0;
    ASSERTZH;
    yaz_log(LOG_API,"zebra_select_databases n=%d [0]=%s",
		    num_bases,basenames[0]);
    zh->errCode=0;
    
    if (num_bases < 1)
    {
        zh->errCode = 23;
        return -1;
    }
    for (i = 0; i < zh->num_basenames; i++)
        xfree (zh->basenames[i]);
    xfree (zh->basenames);
    
    zh->num_basenames = num_bases;
    zh->basenames = xmalloc (zh->num_basenames * sizeof(*zh->basenames));
    for (i = 0; i < zh->num_basenames; i++)
        zh->basenames[i] = xstrdup (basenames[i]);

    cp = strrchr(basenames[0], '/');
    if (cp)
    {
        len = cp - basenames[0];
        new_reg = xmalloc (len + 1);
        memcpy (new_reg, basenames[0], len);
        new_reg[len] = '\0';
    }
    else
        new_reg = xstrdup ("");
    for (i = 1; i<num_bases; i++)
    {
        const char *cp1;

        cp1 = strrchr (basenames[i], '/');
        if (cp)
        {
            if (!cp1)
            {
                zh->errCode = 23;
                return -1;
            }
            if (len != cp1 - basenames[i] ||
                memcmp (basenames[i], new_reg, len))
            {
                zh->errCode = 23;
                return -1;
            }
        }
        else
        {
            if (cp1)
            {
                zh->errCode = 23;
                return -1;
            }
        }
    }
    zebra_select_register (zh, new_reg);
    xfree (new_reg);
    if (!zh->res)
    {
        zh->errCode = 109;
        return -1;
    }
    if (!zh->lock_normal || !zh->lock_shadow)
    {
        zh->errCode = 2;
	return -1;
    }
    return 0;
}

int zebra_search_RPN (ZebraHandle zh, ODR o,
		       Z_RPNQuery *query, const char *setname, int *hits)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_search_rpn");
    zh->errCode=0;
    zh->hits = 0;
    *hits = 0;

    if (zebra_begin_read (zh))
	return 1;

    zebra_livcode_transform(zh, query);

    resultSetAddRPN (zh, odr_extract_mem(o), query, 
                     zh->num_basenames, zh->basenames, setname);

    zebra_end_read (zh);

    *hits = zh->hits;
    return 0;
}

int zebra_records_retrieve (ZebraHandle zh, ODR stream,
			     const char *setname, Z_RecordComposition *comp,
			     oid_value input_format, int num_recs,
			     ZebraRetrievalRecord *recs)
{
    ZebraPosSet poset;
    int i, *pos_array, ret = 0;
    ASSERTZH;
    yaz_log(LOG_API,"zebra_records_retrieve n=%d",num_recs);
    zh->errCode=0;

    if (!zh->res)
    {
        zh->errCode = 30;
        zh->errString = odr_strdup (stream, setname);
        return -1;
    }
    
    zh->errCode = 0;

    if (zebra_begin_read (zh))
	return -1;

    pos_array = (int *) xmalloc (num_recs * sizeof(*pos_array));
    for (i = 0; i<num_recs; i++)
	pos_array[i] = recs[i].position;
    poset = zebraPosSetCreate (zh, setname, num_recs, pos_array);
    if (!poset)
    {
        logf (LOG_DEBUG, "zebraPosSetCreate error");
        zh->errCode = 30;
        zh->errString = nmem_strdup (stream->mem, setname);
	ret = -1;
    }
    else
    {
	for (i = 0; i<num_recs; i++)
	{
	    if (poset[i].term)
	    {
		recs[i].errCode = 0;
		recs[i].format = VAL_SUTRS;
		recs[i].len = strlen(poset[i].term);
		recs[i].buf = poset[i].term;
		recs[i].base = poset[i].db;
	    }
	    else if (poset[i].sysno)
	    {
		recs[i].errCode =
		    zebra_record_fetch (zh, poset[i].sysno, poset[i].score,
					stream, input_format, comp,
					&recs[i].format, &recs[i].buf,
					&recs[i].len,
					&recs[i].base);
		recs[i].errString = NULL;
	    }
	    else
	    {
	        char num_str[20];

		sprintf (num_str, "%d", pos_array[i]);	
		zh->errCode = 13;
                zh->errString = odr_strdup (stream, num_str);
		ret = -1;
                break;
	    }
	}
	zebraPosSetDestroy (zh, poset, num_recs);
    }
    zebra_end_read (zh);
    xfree (pos_array);
    return ret;
}

int zebra_scan (ZebraHandle zh, ODR stream, Z_AttributesPlusTerm *zapt,
		 oid_value attributeset,
		 int *position, int *num_entries, ZebraScanEntry **entries,
		 int *is_partial)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_scan");
    zh->errCode=0;
    if (zebra_begin_read (zh))
    {
	*entries = 0;
	*num_entries = 0;
	return 1;
    }
    rpn_scan (zh, stream, zapt, attributeset,
	      zh->num_basenames, zh->basenames, position,
	      num_entries, entries, is_partial, 0, 0);
    zebra_end_read (zh);
    return 0;
}

int zebra_sort (ZebraHandle zh, ODR stream,
		 int num_input_setnames, const char **input_setnames,
		 const char *output_setname, Z_SortKeySpecList *sort_sequence,
		 int *sort_status)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_sort");
    zh->errCode=0;
    if (zebra_begin_read (zh))
	return 1;
    resultSetSort (zh, stream->mem, num_input_setnames, input_setnames,
		   output_setname, sort_sequence, sort_status);
    zebra_end_read(zh);
    return 0;
}

int zebra_deleleResultSet(ZebraHandle zh, int function,
			  int num_setnames, char **setnames,
			  int *statuses)
{
    int i, status;
    ASSERTZH;
    yaz_log(LOG_API,"zebra_deleleResultSet n=%d",num_setnames);
    zh->errCode=0;
    if (zebra_begin_read(zh))
	return Z_DeleteStatus_systemProblemAtTarget;
    switch (function)
    {
    case Z_DeleteRequest_list:
	resultSetDestroy (zh, num_setnames, setnames, statuses);
	break;
    case Z_DeleteRequest_all:
	resultSetDestroy (zh, -1, 0, statuses);
	break;
    }
    zebra_end_read (zh);
    status = Z_DeleteStatus_success;
    for (i = 0; i<num_setnames; i++)
	if (statuses[i] == Z_DeleteStatus_resultSetDidNotExist)
	    status = statuses[i];
    return status;
}

int zebra_errCode (ZebraHandle zh)
{
    if (zh)
    {
        yaz_log(LOG_API,"zebra_errCode: %d",zh->errCode);
        return zh->errCode;
    }
    yaz_log(LOG_API,"zebra_errCode: o");
    return 0; 
}

const char *zebra_errString (ZebraHandle zh)
{
    const char *e="";
    if (zh)
        e= diagbib1_str (zh->errCode);
    yaz_log(LOG_API,"zebra_errString: %s",e);
    return e;
}

char *zebra_errAdd (ZebraHandle zh)
{
    char *a="";
    if (zh)
        a= zh->errString;
    yaz_log(LOG_API,"zebra_errAdd: %s",a);
    return a;
}

void zebra_clearError(ZebraHandle zh)
{
    if (zh)
    {
        zh->errCode=0;
        zh->errString="";
    }
}

int zebra_auth (ZebraHandle zh, const char *user, const char *pass)
{
    ZebraService zs;
    ASSERTZH;
    yaz_log(LOG_API,"zebra_auth u=%s p=%s",user,pass);
    zh->errCode=0;
    zs= zh->service;
    if (!zs->passwd_db || !passwd_db_auth (zs->passwd_db, user, pass))
    {
        logf(LOG_APP,"AUTHOK:%s", user?user:"ANONYMOUS");
	return 0;
    }

    logf(LOG_APP,"AUTHFAIL:%s", user?user:"ANONYMOUS");
    return 1;
}

int zebra_admin_import_begin (ZebraHandle zh, const char *database,
                               const char *record_type)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_admin_import_begin db=%s rt=%s", 
		     database, record_type);
    zh->errCode=0;
    if (zebra_select_database(zh, database))
        return 1;
    zebra_begin_trans (zh, 1);
    xfree (zh->admin_databaseName);
    zh->admin_databaseName = xstrdup(database);
    return 0;
}

int zebra_admin_import_end (ZebraHandle zh)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_admin_import_end");
    zh->errCode=0;
    zebra_end_trans (zh);
    return 0;
}

int zebra_admin_import_segment (ZebraHandle zh, Z_Segment *segment)
{
    int sysno;
    int i;
    ASSERTZH;
    yaz_log(LOG_API,"zebra_admin_import_segment");
    zh->errCode=0;
    for (i = 0; i<segment->num_segmentRecords; i++)
    {
	Z_NamePlusRecord *npr = segment->segmentRecords[i];
	const char *databaseName = npr->databaseName;

	if (!databaseName)
	    databaseName = zh->admin_databaseName;
	printf ("--------------%d--------------------\n", i);
	if (npr->which == Z_NamePlusRecord_intermediateFragment)
	{
	    Z_FragmentSyntax *fragment = npr->u.intermediateFragment;
	    if (fragment->which == Z_FragmentSyntax_notExternallyTagged)
	    {
		Odr_oct *oct = fragment->u.notExternallyTagged;
		printf ("%.*s", (oct->len > 100 ? 100 : oct->len) ,
			oct->buf);
		
		sysno = 0;
		extract_rec_in_mem (zh, "grs.sgml",
				    oct->buf, oct->len,
				    databaseName,
				    0 /* delete_flag */,
				    0 /* test_mode */,
				    &sysno /* sysno */,
				    1 /* store_keys */,
				    1 /* store_data */,
				    0 /* match criteria */);
	    }
	}
    }
    return 0;
}

int zebra_admin_exchange_record (ZebraHandle zh,
                                 const char *database,
                                 const char *rec_buf,
                                 size_t rec_len,
                                 const char *recid_buf, size_t recid_len,
                                 int action)
{
    int sysno = 0;
    char *rinfo = 0;
    char recid_z[256];
    ASSERTZH;
    yaz_log(LOG_API,"zebra_admin_exchange_record db=%s ac=%d",
		    database, action);
    zh->errCode=0;

    if (!recid_buf || recid_len <= 0 || recid_len >= sizeof(recid_z))
        return -1;
    memcpy (recid_z, recid_buf, recid_len);
    recid_z[recid_len] = 0;

    zebra_begin_trans(zh,1);

    rinfo = dict_lookup (zh->reg->matchDict, recid_z);
    if (rinfo)
    {
        if (action == 1)  /* fail if insert */
        {
	     zebra_end_trans(zh);
	     return -1;
	}

        memcpy (&sysno, rinfo+1, sizeof(sysno));
    }
    else
    {
        if (action == 2 || action == 3) /* fail if delete or update */
        {
	    zebra_end_trans(zh);
            return -1;
	}
    }
    extract_rec_in_mem (zh, "grs.sgml", rec_buf, rec_len, database,
                        action == 3 ? 1 : 0 /* delete flag */,
                        0, &sysno, 1, 1, 0);
    if (action == 1)
    {
        dict_insert (zh->reg->matchDict, recid_z, sizeof(sysno), &sysno);
    }
    else if (action == 3)
    {
        dict_delete (zh->reg->matchDict, recid_z);
    }
    zebra_end_trans(zh);
    return 0;
}

int delete_w_handle(const char *info, void *handle)
{
    ZebraHandle zh = (ZebraHandle) handle;
    ISAMC_P pos;

    if (*info == sizeof(pos))
    {
	memcpy (&pos, info+1, sizeof(pos));
	isamb_unlink(zh->reg->isamb, pos);
    }
    return 0;
}

static int delete_SU_handle(void *handle, int ord)
{
    ZebraHandle zh = (ZebraHandle) handle;
    char ord_buf[20];
    int ord_len;

    ord_len = key_SU_encode (ord, ord_buf);
    ord_buf[ord_len] = '\0';

    assert (zh->reg->isamb);
    dict_delete_subtree(zh->reg->dict, ord_buf,
			zh, delete_w_handle);
    return 0;
}

int zebra_drop_database  (ZebraHandle zh, const char *database)
{
    int ret = 0;
    ASSERTZH;
    yaz_log(LOG_API,"zebra_drop_database");
    zh->errCode = 0;

    if (zebra_select_database (zh, database))
        return -1;
    if (zebra_begin_trans (zh, 1))
        return -1;
    if (zh->reg->isamb)
    {
	zebraExplain_curDatabase (zh->reg->zei, database);
	
	zebraExplain_trav_ord(zh->reg->zei, zh, delete_SU_handle);
	zebraExplain_removeDatabase(zh->reg->zei, zh);
    }
    else
    {
	yaz_log(LOG_WARN, "drop database only supported for isam:b");
	ret = -1;
    }
    zebra_end_trans (zh);
    return ret;
}

int zebra_create_database (ZebraHandle zh, const char *database)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_create_database");
    zh->errCode=0;

    if (zebra_select_database (zh, database))
        return -1;
    if (zebra_begin_trans (zh, 1))
        return -1;

    /* announce database */
    if (zebraExplain_newDatabase (zh->reg->zei, database, 0 
                                  /* explainDatabase */))
    {
        zebra_end_trans (zh);
	zh->errCode = 224;
	zh->errString = "database already exist";
	return -1;
    }
    zebra_end_trans (zh);
    return 0;
}

int zebra_string_norm (ZebraHandle zh, unsigned reg_id,
		       const char *input_str, int input_len,
		       char *output_str, int output_len)
{
    WRBUF wrbuf;
    ASSERTZH;
    yaz_log(LOG_API,"zebra_string_norm ");
    zh->errCode=0;
    if (!zh->reg->zebra_maps)
	return -1;
    wrbuf = zebra_replace(zh->reg->zebra_maps, reg_id, "",
			  input_str, input_len);
    if (!wrbuf)
	return -2;
    if (wrbuf_len(wrbuf) >= output_len)
	return -3;
    if (wrbuf_len(wrbuf))
	memcpy (output_str, wrbuf_buf(wrbuf), wrbuf_len(wrbuf));
    output_str[wrbuf_len(wrbuf)] = '\0';
    return wrbuf_len(wrbuf);
}


int zebra_set_state (ZebraHandle zh, int val, int seqno)
{
    char state_fname[256];
    char *fname;
    long p = getpid();
    FILE *f;
    ASSERTZH;
    yaz_log(LOG_API,"zebra_set_state v=%d seq=%d", val, seqno);
    zh->errCode=0;

    sprintf (state_fname, "state.%s.LCK", zh->reg_name);
    fname = zebra_mk_fname (res_get(zh->res, "lockDir"), state_fname);
    f = fopen (fname, "w");

    yaz_log (LOG_DEBUG, "%c %d %ld", val, seqno, p);
    fprintf (f, "%c %d %ld\n", val, seqno, p);
    fclose (f);
    xfree (fname);
    return 0;
}

int zebra_get_state (ZebraHandle zh, char *val, int *seqno)
{
    char state_fname[256];
    char *fname;
    FILE *f;

    ASSERTZH;
    yaz_log(LOG_API,"zebra_get_state ");
    zh->errCode=0;
    sprintf (state_fname, "state.%s.LCK", zh->reg_name);
    fname = zebra_mk_fname (res_get(zh->res, "lockDir"), state_fname);
    f = fopen (fname, "r");
    *val = 'o';
    *seqno = 0;

    if (f)
    {
        fscanf (f, "%c %d", val, seqno);
        fclose (f);
    }
    xfree (fname);
    return 0;
}

int zebra_begin_read (ZebraHandle zh)
{
    return zebra_begin_trans(zh, 0);
}

int zebra_end_read (ZebraHandle zh)
{
    return zebra_end_trans(zh);
}

int zebra_begin_trans (ZebraHandle zh, int rw)
{
    if (!zh->res)
    {
        zh->errCode = 2;
        zh->errString = "zebra_begin_trans: no database selected";
        return -1;
    }
    ASSERTZHRES;
    yaz_log(LOG_API,"zebra_begin_trans rw=%d",rw);
    assert (zh->res);
    if (rw)
    {
        int pass;
        int seqno = 0;
        char val = '?';
        const char *rval = 0;
        
        (zh->trans_no++);
        if (zh->trans_w_no)
            return 0;
        if (zh->trans_no != 1)
        {
            zh->errCode = 2;
            zh->errString = "zebra_begin_trans: write trans not allowed within read trans";
            return -1;
        }
        if (zh->reg)
	{
            resultSetInvalidate (zh);
            zebra_register_close (zh->service, zh->reg);
	}
        zh->trans_w_no = zh->trans_no;

        zh->errCode=0;
        
        zh->records_inserted = 0;
        zh->records_updated = 0;
        zh->records_deleted = 0;
        zh->records_processed = 0;
        
#if HAVE_SYS_TIMES_H
        times (&zh->tms1);
#endif
        /* lock */
        if (zh->shadow_enable)
            rval = res_get (zh->res, "shadow");
        
        for (pass = 0; pass < 2; pass++)
        {
            if (rval)
            {
                zebra_lock_r (zh->lock_normal);
                zebra_lock_w (zh->lock_shadow);
            }
            else
            {
                zebra_lock_w (zh->lock_normal);
                zebra_lock_w (zh->lock_shadow);
            }
            
            zebra_get_state (zh, &val, &seqno);
            if (val == 'c')
            {
                yaz_log (LOG_LOG, "previous transaction didn't finish commit");
                zebra_unlock (zh->lock_shadow);
                zebra_unlock (zh->lock_normal);
                zebra_commit (zh);
                continue;
            }
            else if (val == 'd')
            {
                if (rval)
                {
                    BFiles bfs = bfs_create (res_get (zh->res, "shadow"),
                                             zh->path_reg);
                    yaz_log (LOG_LOG, "previous transaction didn't reach commit");
                    bf_commitClean (bfs, rval);
                    bfs_destroy (bfs);
            }
                else
                {
                    yaz_log (LOG_WARN, "your previous transaction didn't finish");
                }
            }
            break;
        }
        if (pass == 2)
        {
            yaz_log (LOG_FATAL, "zebra_begin_trans couldn't finish commit");
            abort();
            return -1;
        }
        zebra_set_state (zh, 'd', seqno);
        
        zh->reg = zebra_register_open (zh->service, zh->reg_name,
                                       1, rval ? 1 : 0, zh->res,
                                       zh->path_reg);
        if (zh->reg)
            zh->reg->seqno = seqno;
        else
        {
            zebra_set_state (zh, 'o', seqno);
            
            zebra_unlock (zh->lock_shadow);
            zebra_unlock (zh->lock_normal);

            zh->trans_no--;
            zh->trans_w_no = 0;

            zh->errCode = 2;
            zh->errString = "zebra_begin_trans: cannot open register";
            yaz_log(LOG_FATAL, zh->errString);
            return -1;
        }
    }
    else
    {
        int dirty = 0;
        char val;
        int seqno;
        
        (zh->trans_no)++;
        
        if (zh->trans_no != 1)
        {
            zebra_flush_reg (zh);
            return 0;
        }
        zh->errCode=0;
#if HAVE_SYS_TIMES_H
        times (&zh->tms1);
#endif
        if (!zh->res)
        {
            (zh->trans_no)--;
            zh->errCode = 109;
            return -1;
        }
        if (!zh->lock_normal || !zh->lock_shadow)
        {
            (zh->trans_no)--;
            zh->errCode = 2;
            return -1;
        }
        zebra_get_state (zh, &val, &seqno);
        if (val == 'd')
            val = 'o';
        
        if (!zh->reg)
            dirty = 1;
        else if (seqno != zh->reg->seqno)
        {
            yaz_log (LOG_LOG, "reopen seqno cur/old %d/%d",
                     seqno, zh->reg->seqno);
            dirty = 1;
        }
        else if (zh->reg->last_val != val)
        {
            yaz_log (LOG_LOG, "reopen last cur/old %d/%d",
                     val, zh->reg->last_val);
            dirty = 1;
        }
        if (!dirty)
            return 0;
        
        if (val == 'c')
            zebra_lock_r (zh->lock_shadow);
        else
            zebra_lock_r (zh->lock_normal);
        
        if (zh->reg)
            zebra_register_close (zh->service, zh->reg);
        zh->reg = zebra_register_open (zh->service, zh->reg_name,
                                       0, val == 'c' ? 1 : 0,
                                       zh->res, zh->path_reg);
        if (!zh->reg)
        {
            zebra_unlock (zh->lock_normal);
            zebra_unlock (zh->lock_shadow);
            zh->trans_no--;
            zh->errCode = 109;
            return -1;
        }
        zh->reg->last_val = val;
        zh->reg->seqno = seqno;
    }
    return 0;
}

int zebra_end_trans (ZebraHandle zh)
{
    ZebraTransactionStatus dummy;
    yaz_log(LOG_API,"zebra_end_trans");
    return zebra_end_transaction(zh, &dummy);
}

int zebra_end_transaction (ZebraHandle zh, ZebraTransactionStatus *status)
{
    char val;
    int seqno;
    const char *rval;

    ASSERTZH;
    yaz_log(LOG_API,"zebra_end_transaction");

    status->processed = 0;
    status->inserted  = 0;
    status->updated   = 0;
    status->deleted   = 0;
    status->utime     = 0;
    status->stime     = 0;

    if (!zh->res || !zh->reg)
    {
        zh->errCode = 2;
        zh->errString = "zebra_end_trans: no open transaction";
        return -1;
    }
    if (zh->trans_no != zh->trans_w_no)
    {
        zh->trans_no--;
        if (zh->trans_no != 0)
            return 0;

        /* release read lock */

        zebra_unlock (zh->lock_normal);
        zebra_unlock (zh->lock_shadow);
    }
    else
    {   /* release write lock */
        zh->trans_no--;
        zh->trans_w_no = 0;
        
        yaz_log (LOG_LOG, "zebra_end_trans");
        rval = res_get (zh->res, "shadow");
        
        zebraExplain_runNumberIncrement (zh->reg->zei, 1);
        
        zebra_flush_reg (zh);
        
        resultSetInvalidate (zh);

        zebra_register_close (zh->service, zh->reg);
        zh->reg = 0;
        
        yaz_log (LOG_LOG, "Records: %7d i/u/d %d/%d/%d", 
                 zh->records_processed, zh->records_inserted,
                 zh->records_updated, zh->records_deleted);
        
        status->processed = zh->records_processed;
        status->inserted = zh->records_inserted;
        status->updated = zh->records_updated;
        status->deleted = zh->records_deleted;
        
        zebra_get_state (zh, &val, &seqno);
        if (val != 'd')
        {
            BFiles bfs = bfs_create (rval, zh->path_reg);
            yaz_log (LOG_LOG, "deleting shadow stuff val=%c", val);
            bf_commitClean (bfs, rval);
            bfs_destroy (bfs);
        }
        if (!rval)
            seqno++;
        zebra_set_state (zh, 'o', seqno);
        
        zebra_unlock (zh->lock_shadow);
        zebra_unlock (zh->lock_normal);
        
    }
#if HAVE_SYS_TIMES_H
    times (&zh->tms2);
    logf (LOG_LOG, "user/system: %ld/%ld",
          (long) (zh->tms2.tms_utime - zh->tms1.tms_utime),
          (long) (zh->tms2.tms_stime - zh->tms1.tms_stime));
    
    status->utime = (long) (zh->tms2.tms_utime - zh->tms1.tms_utime);
    status->stime = (long) (zh->tms2.tms_stime - zh->tms1.tms_stime);
#endif
    return 0;
}

int zebra_repository_update (ZebraHandle zh)
{
    ASSERTZH;
    zh->errCode=0;
    logf (LOG_LOG|LOG_API, "updating %s", zh->rGroup.path);
    repositoryUpdate (zh);    
    return zh->errCode;
}

int zebra_repository_delete (ZebraHandle zh)
{
    ASSERTZH;
    zh->errCode=0;
    logf (LOG_LOG|LOG_API, "deleting %s", zh->rGroup.path);
    repositoryDelete (zh);
    return zh->errCode;
}

int zebra_repository_show (ZebraHandle zh)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_repository_show");
    zh->errCode=0;
    repositoryShow (zh);
    return zh->errCode;
}

static int zebra_commit_ex (ZebraHandle zh, int clean_only)
{
    int seqno;
    char val;
    const char *rval;
    BFiles bfs;
    ASSERTZH;
    zh->errCode=0;

    if (!zh->res)
    {
        zh->errCode = 109;
        return -1;
    }
    rval = res_get (zh->res, "shadow");    
    if (!rval)
    {
        logf (LOG_WARN, "Cannot perform commit");
        logf (LOG_WARN, "No shadow area defined");
        return 0;
    }

    zebra_lock_w (zh->lock_normal);
    zebra_lock_r (zh->lock_shadow);

    bfs = bfs_create (res_get (zh->res, "register"), zh->path_reg);

    zebra_get_state (zh, &val, &seqno);

    if (rval && *rval)
        bf_cache (bfs, rval);
    if (bf_commitExists (bfs))
    {
        if (clean_only)
            zebra_set_state (zh, 'd', seqno);
        else
        {
            zebra_set_state (zh, 'c', seqno);
            
            logf (LOG_LOG, "commit start");
            bf_commitExec (bfs);
#ifndef WIN32
            sync ();
#endif
        }
        logf (LOG_LOG, "commit clean");
        bf_commitClean (bfs, rval);
        seqno++;
        zebra_set_state (zh, 'o', seqno);
    }
    else
    {
        logf (LOG_LOG, "nothing to commit");
    }
    bfs_destroy (bfs);

    zebra_unlock (zh->lock_shadow);
    zebra_unlock (zh->lock_normal);
    return 0;
}

int zebra_clean (ZebraHandle zh)
{
    yaz_log(LOG_API,"zebra_clean");
    return zebra_commit_ex(zh, 1);
}

int zebra_commit (ZebraHandle zh)
{
    yaz_log(LOG_API,"zebra_commit");
    return zebra_commit_ex(zh, 0);
}

int zebra_init (ZebraHandle zh)
{
    const char *rval;
    BFiles bfs = 0;
    ASSERTZH;
    yaz_log(LOG_API,"zebra_init");
    zh->errCode=0;

    if (!zh->res)
    {
        zh->errCode = 109;
        return -1;
    }
    rval = res_get (zh->res, "shadow");

    bfs = bfs_create (res_get (zh->service->global_res, "register"),
                      zh->path_reg);
    if (rval && *rval)
        bf_cache (bfs, rval);
    
    bf_reset (bfs);
    bfs_destroy (bfs);
    zebra_set_state (zh, 'o', 0);
    return 0;
}

int zebra_compact (ZebraHandle zh)
{
    BFiles bfs;
    ASSERTZH;
    yaz_log(LOG_API,"zebra_compact");
    zh->errCode=0;
    if (!zh->res)
    {
        zh->errCode = 109;
        return -1;
    }
    bfs = bfs_create (res_get (zh->res, "register"), zh->path_reg);
    inv_compact (bfs);
    bfs_destroy (bfs);
    return 0;
}

int zebra_record_insert (ZebraHandle zh, const char *buf, int len, int *sysno)
{
    int sysn=0;
    ASSERTZH;
    yaz_log(LOG_API,"zebra_record_insert");
    if (sysno)
	*sysno=0;
    zh->errCode=0;
    if (zebra_begin_trans (zh, 1))
        return -1;
    extract_rec_in_mem (zh, "grs.sgml",
                        buf, len,
                        "Default",  /* database */
                        0 /* delete_flag */,
                        0 /* test_mode */,
                        &sysn /* sysno */,
                        1 /* store_keys */,
                        1 /* store_data */,
                        0 /* match criteria */);
    if (zebra_end_trans (zh))
        return -1;
    if (sysno)
	*sysno=sysn;
    return 0;
}

int zebra_set_group (ZebraHandle zh, struct recordGroup *rg)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_set_group");
    zh->errCode=0;
    memcpy (&zh->rGroup, rg, sizeof(*rg));
    return 0;
}

int zebra_result (ZebraHandle zh, int *code, char **addinfo)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_result");
    *code = zh->errCode;
    *addinfo = zh->errString;
    return 0;
}

int zebra_shadow_enable (ZebraHandle zh, int value)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_shadow_enable");
    zh->errCode=0;
    zh->shadow_enable = value;
    return 0;
}

int zebra_record_encoding (ZebraHandle zh, const char *encoding)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_record_encoding");
    zh->errCode=0;
    xfree (zh->record_encoding);

    /*
     * Fixme!
     * Something about charset aliases. Oleg???
     */

    if (zh->iconv_to_utf8 != 0)
        yaz_iconv_close(zh->iconv_to_utf8);
    if (zh->iconv_from_utf8 != 0)
        yaz_iconv_close(zh->iconv_from_utf8);
    
    zh->record_encoding = xstrdup (encoding);
    
    logf(LOG_DEBUG, "Reset record encoding: %s", encoding);
    
    zh->iconv_to_utf8 =
        yaz_iconv_open ("UTF-8", encoding);
    if (zh->iconv_to_utf8 == 0)
        yaz_log (LOG_WARN, "iconv: %s to UTF-8 unsupported", encoding);
    zh->iconv_from_utf8 =
        yaz_iconv_open (encoding, "UTF-8");
    if (zh->iconv_to_utf8 == 0)
        yaz_log (LOG_WARN, "iconv: UTF-8 to %s unsupported", encoding);

    return 0;
}

int zebra_set_resource(ZebraHandle zh, const char *name, const char *value)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_set_resource %s:%s",name,value);
    zh->errCode=0;
    res_put(zh->res, name, value);
    return 0;
}

const char *zebra_get_resource(ZebraHandle zh,
                               const char *name, const char *defaultvalue)
{
    const char *v;
    ASSERTZH;
    v= res_get_def( zh->res, name, (char *)defaultvalue);
    zh->errCode=0;
    yaz_log(LOG_API,"zebra_get_resource %s:%s",name,v);
    return v;
}

/* moved from zebra_api_ext.c by pop */
/* FIXME: Should this really be public??? -Heikki */

int zebra_trans_no (ZebraHandle zh)
{
    ASSERTZH;
    yaz_log(LOG_API,"zebra_trans_no");
    return zh->trans_no;
}

int zebra_get_shadow_enable (ZebraHandle zh)
{
    yaz_log(LOG_API,"zebra_get_shadow_enable");
    return (zh->shadow_enable);
}

int zebra_set_shadow_enable (ZebraHandle zh, int value)
{
    yaz_log(LOG_API,"zebra_set_shadow_enable %d",value);
    zh->shadow_enable = value;
    return 0;
}

int init_recordGroup (struct recordGroup *rg)
{
    assert(rg);
    yaz_log(LOG_API,"init_recordGroup");
    rg->groupName = NULL;
    rg->databaseName = NULL;
    rg->path = NULL;
    rg->recordId = NULL;
    rg->recordType = NULL;
    rg->flagStoreData = -1;
    rg->flagStoreKeys = -1; 
    rg->flagRw = 1;
    rg->databaseNamePath = 0;
    rg->explainDatabase = 0; 
    rg->fileVerboseLimit = 100000; 
    rg->followLinks = -1;
    return 0;
} 


/* This is from extract.c... it seems useful, when extract_rec_in mem is 
   called... and in general... Should be moved to somewhere else */
void res_get_recordGroup (ZebraHandle zh,
			  struct recordGroup *rGroup,
			  const char *ext)
{
    char gprefix[128];
    char ext_res[128]; 
    
    yaz_log(LOG_API,"res_get_recordGroup e=%s",ext);
    if (!rGroup->groupName || !*rGroup->groupName)
	*gprefix = '\0';
    else 
	sprintf (gprefix, "%s.", rGroup->groupName);
    
    /* determine file type - depending on extension */
    if (!rGroup->recordType) {
	sprintf (ext_res, "%srecordType.%s", gprefix, ext);
	if (!(rGroup->recordType = res_get (zh->res, ext_res))) {
	    sprintf (ext_res, "%srecordType", gprefix);
	    rGroup->recordType = res_get (zh->res, ext_res);
	}
    }
    /* determine match criteria */
    if (!rGroup->recordId) { 
	sprintf (ext_res, "%srecordId.%s", gprefix, ext);
	if (!(rGroup->recordId = res_get (zh->res, ext_res))) {
	    sprintf (ext_res, "%srecordId", gprefix);
	    rGroup->recordId = res_get (zh->res, ext_res);
	}
    } 
    
    /* determine database name */
    if (!rGroup->databaseName) {
	sprintf (ext_res, "%sdatabase.%s", gprefix, ext);
	if (!(rGroup->databaseName = res_get (zh->res, ext_res))) { 
	    sprintf (ext_res, "%sdatabase", gprefix);
	    rGroup->databaseName = res_get (zh->res, ext_res);
	}
    }
    if (!rGroup->databaseName)
	rGroup->databaseName = "Default";
    
    /* determine if explain database */
    sprintf (ext_res, "%sexplainDatabase", gprefix);
    rGroup->explainDatabase =
	atoi (res_get_def (zh->res, ext_res, "0"));
    
    /* storeData */
    if (rGroup->flagStoreData == -1)
    {
	const char *sval;
	sprintf (ext_res, "%sstoreData.%s", gprefix, ext);
	if (!(sval = res_get (zh->res, ext_res)))
	{
	    sprintf (ext_res, "%sstoreData", gprefix);
	    sval = res_get (zh->res, ext_res);
	}
	if (sval)
	    rGroup->flagStoreData = atoi (sval);
    }
    if (rGroup->flagStoreData == -1) 
	rGroup->flagStoreData = 0;
    
    /* storeKeys */
    if (rGroup->flagStoreKeys == -1)
    {
	const char *sval;
	
	sprintf (ext_res, "%sstoreKeys.%s", gprefix, ext);
	sval = res_get (zh->res, ext_res);
	if (!sval)
	{
	    sprintf (ext_res, "%sstoreKeys", gprefix);
	    sval = res_get (zh->res, ext_res);
	}
	if (!sval)
	    sval = res_get (zh->res, "storeKeys");
	if (sval)
	    rGroup->flagStoreKeys = atoi (sval);
    }
    if (rGroup->flagStoreKeys == -1)
	rGroup->flagStoreKeys = 0;
} 


/* almost the same as zebra_records_retrieve ... but how did it work? 
   I mean for multiple records ??? CHECK ??? */
void api_records_retrieve (ZebraHandle zh, ODR stream,
			   const char *setname, Z_RecordComposition *comp,
			   oid_value input_format, int num_recs,
			   ZebraRetrievalRecord *recs)
{
    ZebraPosSet poset;
    int i, *pos_array;
    yaz_log(LOG_API,"api_records_retrieve s=%s n=%d",setname,num_recs);

    if (!zh->res)
    {
        zh->errCode = 30;
        zh->errString = odr_strdup (stream, setname);
        return;
    }
    
    zh->errCode = 0; 

    if (zebra_begin_read (zh))
	return;

    pos_array = (int *) xmalloc (num_recs * sizeof(*pos_array));
    for (i = 0; i<num_recs; i++)
	pos_array[i] = recs[i].position;
    poset = zebraPosSetCreate (zh, setname, num_recs, pos_array);
    if (!poset)
    {
        logf (LOG_DEBUG, "zebraPosSetCreate error");
        zh->errCode = 30;
        zh->errString = nmem_strdup (stream->mem, setname);
    }
    else
    {
	for (i = 0; i<num_recs; i++)
	{
	    if (poset[i].term)
	    {
		recs[i].errCode = 0;
		recs[i].format = VAL_SUTRS;
		recs[i].len = strlen(poset[i].term);
		recs[i].buf = poset[i].term;
		recs[i].base = poset[i].db;
		recs[i].sysno = 0;
	    
	    }
	    else if (poset[i].sysno)
	    {
	      /* changed here ??? CHECK ??? */
	      char *b;
		recs[i].errCode =
		    zebra_record_fetch (zh, poset[i].sysno, poset[i].score,
					stream, input_format, comp,
					&recs[i].format, 
					&b,
					&recs[i].len,
					&recs[i].base);
		recs[i].buf = (char *) odr_malloc(stream,recs[i].len);
		memcpy(recs[i].buf, b, recs[i].len);
		recs[i].errString = 0; /* Hmmm !!! we should get this */ 
		recs[i].sysno = poset[i].sysno;
		recs[i].score = poset[i].score;
	    }
	    else
	    {
	        char num_str[20];

		sprintf (num_str, "%d", pos_array[i]);	
		zh->errCode = 13;
                zh->errString = odr_strdup (stream, num_str);
                break;
	    }

	}
	zebraPosSetDestroy (zh, poset, num_recs);
    }
    zebra_end_read (zh);
    xfree (pos_array);
}


/* ---------------------------------------------------------------------------
  Record insert(=update), delete 

  If sysno is provided, then it's used to identify the reocord.
  If not, and match_criteria is provided, then sysno is guessed
  If not, and a record is provided, then sysno is got from there
NOTE: Now returns 0 at success and updates sysno, which is an int*
  20-jun-2003 Heikki
*/

int zebra_insert_record (ZebraHandle zh, 
			 struct recordGroup *rGroup,
			 const char *recordType,
			 int *sysno, const char *match, const char *fname,
			 const char *buf, int buf_size,
			 int force_update) /* This one is ignored */
 
{
    int res;
    yaz_log(LOG_API,"zebra_insert_record sysno=%d", *sysno);

    if (buf_size < 1) buf_size = strlen(buf);

    zebra_begin_trans(zh, 1);
    res=bufferExtractRecord (zh, buf, buf_size, rGroup, 
			     0, /* delete_flag  */
			     0, /* test_mode */
			     recordType,
			     sysno,   
			     match, fname,
			     force_update, 
			     0); /* allow_update */
    zebra_end_trans(zh); 
    if (res < 0) return (res);
    return res; 
}

int zebra_update_record (ZebraHandle zh, 
			 struct recordGroup *rGroup,
			 const char *recordType,
			 int* sysno, const char *match, const char *fname,
			 const char *buf, int buf_size,
			 int force_update)
{
    int res;

    yaz_log(LOG_API,"zebra_update_record sysno=%d", *sysno);

    if (buf_size < 1) buf_size = strlen(buf);

    zebra_begin_trans(zh, 1);
    res=bufferExtractRecord (zh, buf, buf_size, rGroup, 
			     0, /* delete_flag */
			     0, /* test_mode */
			     recordType,
			     sysno,   
			     match, fname,
			     force_update, 
			     1); /* allow_update */
    zebra_end_trans(zh); 
    return res; 
}

int zebra_delete_record (ZebraHandle zh, 
			 struct recordGroup *rGroup, 
			 const char *recordType,
			 int *sysno, const char *match, const char *fname,
			 const char *buf, int buf_size,
			 int force_update) 
{
    int res;
    yaz_log(LOG_API,"zebra_delete_record sysno=%d", *sysno);

    if (buf_size < 1) buf_size = strlen(buf);

    zebra_begin_trans(zh, 1);
    res=bufferExtractRecord (zh, buf, buf_size, rGroup, 
			     1, /* delete_flag */
			     0, /* test_mode */
			     recordType,
			     sysno,
			     match,fname,
			     force_update,
			     1); /* allow_update */
    zebra_end_trans(zh);
    return res;   
}

/* ---------------------------------------------------------------------------
  Searching 
*/

int zebra_search_PQF (ZebraHandle zh, const char *pqf_query,
		      const char *setname, int *numhits)
{
    int hits = 0;
    int res=-1;
    Z_RPNQuery *query;
    ODR odr = odr_createmem(ODR_ENCODE);

    yaz_log(LOG_API,"zebra_search_PQF s=%s q=%s",setname, pqf_query);
    
    query = p_query_rpn (odr, PROTO_Z3950, pqf_query);
    
    if (!query)
        yaz_log (LOG_WARN, "bad query %s\n", pqf_query);
    else
        res=zebra_search_RPN (zh, odr, query, setname, &hits);
    
    odr_destroy(odr);

    yaz_log(LOG_API,"Hits: %d",hits);

    if (numhits)
	*numhits=hits;

    return res;
}

/* ---------------------------------------------------------------------------
  Sort - a simplified interface, with optional read locks.
  FIXME - This is a horrible name, will conflict with half the applications
*/
int zebra_sort_by_specstr (ZebraHandle zh, 
			   ODR stream,
			   const char *sort_spec,
			   const char *output_setname,
			   const char **input_setnames) 
{
    int num_input_setnames = 0;
    int sort_status = 0;
    Z_SortKeySpecList *sort_sequence = yaz_sort_spec (stream, sort_spec);
    yaz_log(LOG_API,"sort (FIXME) ");
    if (!sort_sequence)
    {
        logf(LOG_WARN,"invalid sort specs '%s'", sort_spec);
        zh->errCode = 207;
	return -1;
    }
    
    /* we can do this, since the perl typemap code for char** will 
       put a NULL at the end of list */
    while (input_setnames[num_input_setnames]) num_input_setnames++;

    if (zebra_begin_read (zh))
        return -1;
    
    resultSetSort (zh, stream->mem, num_input_setnames, input_setnames,
                   output_setname, sort_sequence, &sort_status);
    
    zebra_end_read(zh);
    return sort_status;
}
