/** BEGIN COPYRIGHT BLOCK
 * Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
 * Copyright (C) 2005 Red Hat, Inc.
 * All rights reserved.
 *
 * License: GPL (version 3 or any later version).
 * See LICENSE for details.
 * END COPYRIGHT BLOCK **/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif


#include "slap.h"

Slapi_RDN *
slapi_rdn_new()
{
    Slapi_RDN *rdn = (Slapi_RDN *)slapi_ch_malloc(sizeof(struct slapi_rdn));
    slapi_rdn_init(rdn);
    return rdn;
}

Slapi_RDN *
slapi_rdn_new_dn(const char *dn)
{
    Slapi_RDN *rdn = slapi_rdn_new();
    slapi_rdn_init_dn(rdn, dn);
    return rdn;
}

Slapi_RDN *
slapi_rdn_new_all_dn(const char *dn)
{
    Slapi_RDN *rdn = slapi_rdn_new();
    slapi_rdn_init_all_dn(rdn, dn);
    return rdn;
}

Slapi_RDN *
slapi_rdn_new_sdn(const Slapi_DN *sdn)
{
    Slapi_RDN *rdn = slapi_rdn_new();
    slapi_rdn_init_sdn(rdn, sdn);
    return rdn;
}

Slapi_RDN *
slapi_rdn_new_rdn(const Slapi_RDN *fromrdn)
{
    Slapi_RDN *rdn = slapi_rdn_new();
    slapi_rdn_init_rdn(rdn, fromrdn);
    return rdn;
}

void
slapi_rdn_init(Slapi_RDN *rdn)
{
    rdn->flag = 0;
    rdn->rdn = NULL;
    rdn->nrdn = NULL;
    rdn->rdns = NULL;
    rdn->all_rdns = NULL;
    rdn->all_nrdns = NULL;
    rdn->butcheredupto = -1; /* Means we haven't started converting '=' to '\0' in rdns */
}

void
slapi_rdn_init_dn(Slapi_RDN *rdn, const char *dn)
{
    slapi_rdn_init(rdn);
    if (dn != NULL) {
        char **dns = slapi_ldap_explode_dn(dn, 0);
        if (dns != NULL) {
            rdn->rdn = slapi_ch_strdup(dns[0]);
            slapi_ldap_value_free(dns);
        }
    }
}

/*
 * This function sets dn to Slapi_RDN.
 * Note: This function checks if the DN is in the root or sub suffix
 * the server owns.  If it is, the root or sub suffix is treated as one
 * "rdn" (e.g., "dc=sub,dc=example,dc=com") and 0 is returned.
 * If it is not, the DN is separated by ',' and each string is set to RDN
 * array. (e.g., input: "uid=A,ou=does_not_exist" ==> "uid=A", "ou=
 * does_not_exist") and 1 is returned.
 *
 * Return Value:  0 -- Success
 *               -1 -- Error (invalid input: NULL DN or RDN, empty RDN ",,")
 *                1 -- "dn" does not belong to the database; could be "rdn"
 */
static int
_slapi_rdn_init_all_dn_ext(Slapi_RDN *rdn, const Slapi_DN *sdn, int is_tombstone)
{
    const char *dn = NULL;
    const char *ndn = NULL;
    const Slapi_DN *suffix = NULL;
    char **dns = NULL;
    int rc = 1;

    if (NULL == rdn || NULL == sdn) {
        return -1;
    }

    dn = slapi_sdn_get_dn(sdn);
    if (NULL == dn) {
        return -1;
    }
    for (; isspace(*dn); dn++)
        ;

    /* Suffix is a part of mapping tree. We should not free it */
    suffix = slapi_get_suffix_by_dn(sdn);
    if (suffix) {
        char *p;
        ndn = slapi_sdn_get_ndn(sdn);
        p = PL_strcaserstr(ndn, slapi_sdn_get_ndn(suffix));
        if (p) {
            if (p == ndn) { /* dn is suffix */
                charray_add(&dns, slapi_ch_strdup(dn));
                rc = 0; /* success */
            } else {
                int commas = 0;
                int len = strlen(dn);
                char *endp = NULL;
                /* count ',' in suffix */
                char *q = (char *)slapi_sdn_get_ndn(suffix);
                while (NULL != (q = PL_strchr(q, ','))) {
                    commas++;
                    q++;
                }
                /* found out the previous ',' (++commas-th) to suffix in dn */
                ++commas;
                q = endp = (char *)dn + len;
                while (commas > 0 && q) {
                    q = PL_strnrchr(dn, ',', len);
                    commas--;
                    if (q) {
                        len -= endp - q;
                        endp = q;
                    }
                }
                if (q) {
                    char bakup = *q;
                    *q = '\0';
                    dns = slapi_ldap_explode_dn(dn, 0);
                    if (NULL == dns) { /* if dn contains NULL RDN (e.g., ",,"),
                                          slapi_ldap_explode_dn returns NULL */
                        *q = bakup;
                        return -1;
                    }
                    /* add the suffix */
                    charray_add(&dns,
                                slapi_ch_strdup(slapi_sdn_get_dn(suffix)));
                    *q = bakup;
                    rc = 0; /* success */
                } else {
                    /* Given dn does not belong to this server. Just set it. */
                    dns = slapi_ldap_explode_dn(dn, 0);
                }
            }
        } else {
            /* Given dn does not belong to this server. Just set it. */
            dns = slapi_ldap_explode_dn(dn, 0);
        }
    } else {
        /* Given dn does not belong to this server. Just set it. */
        dns = slapi_ldap_explode_dn(dn, 0);
    }

    /* Get the last matched position */
    if (dns) {
        if (is_tombstone && slapi_is_special_rdn(dns[0], RDN_IS_TOMBSTONE)) {
            /* merge nsuniqueid=...,<rdn> into one rdn */
            rdn->rdn = slapi_ch_smprintf("%s,%s", dns[0], dns[1]);
            slapi_ch_free_string(&dns[0]);
            dns[0] = slapi_ch_strdup(rdn->rdn);
            charray_remove(dns, dns[1], 1);
        } else {
            rdn->rdn = slapi_ch_strdup(dns[0]);
        }
        rdn->all_rdns = dns;
        slapi_setbit_uchar(rdn->flag, FLAG_ALL_RDNS);
    }

    return rc;
}

/*
 * This function sets dn to Slapi_RDN.
 * Note: The underlying function _slapi_rdn_init_all_dn_ext checks if the DN
 * is in the root or sub suffix the server owns.  If it is, the root or sub
 * suffix is treated as one "rdn" (e.g., "dc=sub,dc=example,dc=com") and 0 is
 * returned.  If it is not, the DN is separated by ',' and each string is set
 * to RDN array. (e.g., input: "uid=A,ou=does_not_exist" ==> "uid=A", "ou=
 * does_not_exist") and 1 is returned.
 *
 * Return Value:  0 -- Success
 *               -1 -- Error
 *                1 -- dn does not belong to the database
 */
int
slapi_rdn_init_all_dn(Slapi_RDN *rdn, const char *dn)
{
    int rc = 0; /* success */
    Slapi_DN sdn;

    if (NULL == rdn || NULL == dn) {
        return -1;
    }
    slapi_rdn_init(rdn);
    slapi_sdn_init(&sdn);
    slapi_sdn_set_dn_byval(&sdn, dn);
    rc = _slapi_rdn_init_all_dn_ext(rdn, (const Slapi_DN *)&sdn, 0);
    slapi_sdn_done(&sdn);
    return rc;
}

/*
 * This function sets DN from sdn to Slapi_RDN.
 * Note: The underlying function _slapi_rdn_init_all_dn_ext checks if the DN
 * is in the root or sub suffix the server owns.  If it is, the root or sub
 * suffix is treated as one "rdn" (e.g., "dc=sub,dc=example,dc=com") and 0 is
 * returned.  If it is not, the DN is separated by ',' and each string is set
 * to RDN array. (e.g., input: "uid=A,ou=does_not_exist" ==> "uid=A", "ou=
 * does_not_exist") and 1 is returned.
 *
 * Return Value:  0 -- Success
 *               -1 -- Error
 *                1 -- dn does not belong to the database
 */
int
slapi_rdn_init_all_sdn_ext(Slapi_RDN *rdn, const Slapi_DN *sdn, int is_tombstone)
{
    int rc = 0; /* success */

    if (NULL == rdn || NULL == sdn) {
        return -1;
    }
    slapi_rdn_init(rdn);
    rc = _slapi_rdn_init_all_dn_ext(rdn, sdn, is_tombstone);
    return rc;
}

/*
 * This function sets DN from sdn to Slapi_RDN.
 * Note: The underlying function _slapi_rdn_init_all_dn_ext checks if the DN
 * is in the root or sub suffix the server owns.  If it is, the root or sub
 * suffix is treated as one "rdn" (e.g., "dc=sub,dc=example,dc=com") and 0 is
 * returned.  If it is not, the DN is separated by ',' and each string is set
 * to RDN array. (e.g., input: "uid=A,ou=does_not_exist" ==> "uid=A", "ou=
 * does_not_exist") and 1 is returned.
 *
 * Return Value:  0 -- Success
 *               -1 -- Error
 *                1 -- dn does not belong to the database
 */
int
slapi_rdn_init_all_sdn(Slapi_RDN *rdn, const Slapi_DN *sdn)
{
    int rc = 0; /* success */

    if (NULL == rdn || NULL == sdn) {
        return -1;
    }
    slapi_rdn_init(rdn);
    rc = _slapi_rdn_init_all_dn_ext(rdn, sdn, 0);
    return rc;
}

void
slapi_rdn_init_sdn(Slapi_RDN *rdn, const Slapi_DN *sdn)
{
    if (sdn != NULL) {
        slapi_rdn_init_dn(rdn, slapi_sdn_get_dn(sdn));
    } else {
        slapi_rdn_init(rdn);
    }
}

void
slapi_rdn_init_rdn(Slapi_RDN *rdn, const Slapi_RDN *fromrdn)
{
    slapi_rdn_init(rdn);
    rdn->rdn = slapi_ch_strdup(fromrdn->rdn);
}

/*
 * flags:
 * SLAPI_RDN_SET_DN_SKIP_UNIQUEID -- strip uniqueid, and set to rdn
 * SLAPI_RDN_SET_DN_INCLUDE_UNIQUEID -- set <uniqueid,rdn> to rdn
 */
void
slapi_rdn_set_dn_ext(Slapi_RDN *rdn, const char *dn, int flags)
{
    const char *mydn = dn;
    slapi_rdn_done(rdn);
    if (flags && slapi_is_special_rdn(dn, RDN_IS_TOMBSTONE)) {
        if (SLAPI_RDN_SET_DN_SKIP_UNIQUEID == flags) {
            mydn = dn + slapi_uniqueIDRdnSize() + 1 /*,*/;
            slapi_rdn_init_dn(rdn, mydn);
        } else if (SLAPI_RDN_SET_DN_INCLUDE_UNIQUEID == flags) {
            Slapi_DN sdn = {0};
            slapi_sdn_set_dn_byval(&sdn, dn);
            _slapi_rdn_init_all_dn_ext(rdn, (const Slapi_DN *)&sdn, 1);
            slapi_sdn_done(&sdn);
        }
    } else {
        slapi_rdn_init_dn(rdn, mydn);
    }
}

void
slapi_rdn_set_dn(Slapi_RDN *rdn, const char *dn)
{
    slapi_rdn_done(rdn);
    slapi_rdn_init_dn(rdn, dn);
}

void
slapi_rdn_set_all_dn(Slapi_RDN *rdn, const char *dn)
{
    slapi_rdn_done(rdn);
    slapi_rdn_init_all_dn(rdn, dn);
}

void
slapi_rdn_set_sdn(Slapi_RDN *rdn, const Slapi_DN *sdn)
{
    slapi_rdn_done(rdn);
    slapi_rdn_init_sdn(rdn, sdn);
}

void
slapi_rdn_set_rdn(Slapi_RDN *rdn, const Slapi_RDN *fromrdn)
{
    slapi_rdn_done(rdn);
    slapi_rdn_init_rdn(rdn, fromrdn);
}

static char **
slapi_rdn_get_rdns(Slapi_RDN *rdn)
{
    char **rdns = NULL;
    /* Check if rdns is upto date */
    if (!slapi_isbitset_uchar(rdn->flag, FLAG_RDNS)) {
        if (rdn->rdns != NULL) {
            slapi_ldap_value_free(rdn->rdns);
            rdn->rdns = NULL;
        }
        if (rdn->rdn != NULL) {
            rdn->rdns = slapi_ldap_explode_rdn(rdn->rdn, 0);
            rdns = rdn->rdns;
        }
        slapi_setbit_uchar(rdn->flag, FLAG_RDNS);
        rdn->butcheredupto = -1;
    }
    return rdns;
}


void
slapi_rdn_free(Slapi_RDN **rdn)
{
    if (rdn != NULL) {
        slapi_rdn_done(*rdn);
        slapi_ch_free((void **)rdn);
    }
}

void
slapi_rdn_done(Slapi_RDN *rdn)
{
    if (rdn != NULL) {
        slapi_ch_free_string(&(rdn->rdn));
        slapi_ch_free_string(&(rdn->nrdn));
        slapi_ldap_value_free(rdn->rdns);
        slapi_ldap_value_free(rdn->all_rdns);
        slapi_ldap_value_free(rdn->all_nrdns);
        slapi_rdn_init(rdn);
    }
}

int
slapi_rdn_get_first(Slapi_RDN *rdn, char **type, char **value)
{
    return slapi_rdn_get_next(rdn, 0, type, value);
}

int
slapi_rdn_get_next(Slapi_RDN *rdn, int index, char **type, char **value)
{
    int returnindex;
    PR_ASSERT(index >= 0);
    if (rdn->rdns == NULL) {
        rdn->rdns = slapi_rdn_get_rdns(rdn);
    }

    if (rdn->rdns == NULL || rdn->rdns[index] == NULL) {
        *type = NULL;
        *value = NULL;
        returnindex = -1;
    } else {
        if (rdn->butcheredupto >= index) {
            /* the '=' has already been converted to a '\0' */
            *type = rdn->rdns[index];
            *value = *type + strlen(*type) + 1;
            returnindex = ++index;
        } else {
            *type = PL_strchr(rdn->rdns[index], '=');
            if (*type == NULL) {
                /* This just shouldn't happen... */
                *type = NULL;
                *value = NULL;
                returnindex = -1;
            } else {
                **type = '\0';
                *value = *type;
                (*value)++; /* Skip the '\0' */
                *type = rdn->rdns[index];
                rdn->butcheredupto = index;
                returnindex = ++index;
            }
        }
    }
    return returnindex;
}

int
slapi_rdn_get_index(Slapi_RDN *rdn, const char *type, const char *value, size_t length)
{
    int result;
    char *theValue;
    result = slapi_rdn_get_index_attr(rdn, type, &theValue);
    if (result != -1) {
        if (theValue == NULL || (strncasecmp(value, theValue, length) != 0)) {
            result = -1;
        }
    }
    return result;
}

int
slapi_rdn_get_index_attr(Slapi_RDN *rdn, const char *type, char **value)
{
    int result = -1;
    int index;
    char *theType;
    index = slapi_rdn_get_first(rdn, &theType, value);
    while (index != -1) {
        if (theType != NULL && value != NULL &&
            (strcasecmp(type, theType) == 0)) {
            result = index;
            index = -1;
        } else {
            index = slapi_rdn_get_next(rdn, index, &theType, value);
        }
    }
    return result;
}

int
slapi_rdn_contains_attr(Slapi_RDN *rdn, const char *type, char **value)
{
    return (slapi_rdn_get_index_attr(rdn, type, value) != -1);
}

int
slapi_rdn_contains(Slapi_RDN *rdn, const char *type, const char *value, size_t length)
{
    return (slapi_rdn_get_index(rdn, type, value, length) != -1);
}

int
slapi_rdn_is_multivalued(Slapi_RDN *rdn)
{
    char *p = NULL;
    if (rdn && rdn->rdn) {
        p = PL_strchr(rdn->rdn, '+');
    }
    if (p) {
        return 1;
    } else {
        return 0;
    }
}

/*
 * Return value 1: if rdn is a conflict rdn
 *              0: otherwise
 */
int
slapi_rdn_is_conflict(Slapi_RDN *rdn)
{
    if (!rdn) {
        return 0;
    }
    return slapi_is_special_rdn(slapi_rdn_get_nrdn(rdn), RDN_IS_CONFLICT);
}

int
slapi_rdn_add(Slapi_RDN *rdn, const char *type, const char *value)
{
    PR_ASSERT(NULL != type);
    PR_ASSERT(NULL != value);
    if (rdn->rdn == NULL) {
        /* type=value '\0' */
        rdn->rdn = slapi_create_dn_string("%s=%s", type, value);
    } else {
        char *newrdn = NULL;
        char *rp = rdn->rdn;
        PRUint32 uniqueidlen = slapi_uniqueIDRdnSize();

        if (slapi_is_special_rdn(rp, RDN_IS_TOMBSTONE)) {
            char *corerp = rp + uniqueidlen + 1;
            *(rp + uniqueidlen) = '\0';
            newrdn = slapi_create_dn_string("%s,%s=%s+%s", rp, type, value, corerp);
        } else {
            /* type=value+rdn '\0' */
            newrdn = slapi_create_dn_string("%s=%s+%s", type, value, rp);
        }
        slapi_ch_free_string(&rdn->rdn);
        rdn->rdn = newrdn;
    }
    slapi_unsetbit_uchar(rdn->flag, FLAG_RDNS);

    if (rdn->all_rdns && rdn->all_rdns[0]) {
        slapi_ch_free_string(&rdn->all_rdns[0]);
        rdn->all_rdns[0] = slapi_ch_strdup(rdn->rdn);
    }
    if (rdn->all_nrdns && rdn->all_nrdns[0]) {
        slapi_ch_free_string(&rdn->all_nrdns[0]);
        rdn->all_nrdns[0] = slapi_ch_strdup(rdn->rdn);
        slapi_dn_ignore_case(rdn->all_nrdns[0]);
    }
    return 1;
}

int
slapi_rdn_remove_index(Slapi_RDN *rdn, int atindex)
{
    Slapi_RDN newrdn;
    int result = 0;
    int index;
    char *theType;
    char *theValue;
    slapi_rdn_init(&newrdn);
    index = slapi_rdn_get_first(rdn, &theType, &theValue);
    while (index != -1) {
        if (index != atindex) {
            slapi_rdn_add(&newrdn, theType, theValue);
        } else {
            result = 1;
        }
        index = slapi_rdn_get_next(rdn, index, &theType, &theValue);
    }
    if (result) {
        slapi_rdn_set_rdn(rdn, &newrdn);
    }
    slapi_rdn_done(&newrdn);
    return result;
}

int
slapi_rdn_remove(Slapi_RDN *rdn, const char *type, const char *value, size_t length)
{
    int result = 0;
    if (rdn->rdn != NULL) {
        int atindex = slapi_rdn_get_index(rdn, type, value, length);
        if (atindex != -1) {
            result = slapi_rdn_remove_index(rdn, atindex);
        }
    }
    return result;
}

int
slapi_rdn_remove_attr(Slapi_RDN *rdn, const char *type)
{
    int result = 0;
    if (rdn->rdn != NULL) {
        char *value;
        int atindex = slapi_rdn_get_index_attr(rdn, type, &value);
        if (atindex != -1) {
            result = slapi_rdn_remove_index(rdn, atindex);
        }
    }
    return result;
}

int
slapi_rdn_isempty(const Slapi_RDN *rdn)
{
    return (rdn->rdn == NULL || rdn->rdn[0] == '\0');
}

int
slapi_rdn_get_num_components(Slapi_RDN *rdn)
{
    int i = 0;
    char **rdns = slapi_rdn_get_rdns(rdn);
    if (rdns != NULL) {
        for (i = 0; rdns[i] != NULL; i++)
            ;
    }
    return i;
}

int
slapi_rdn_compare(Slapi_RDN *rdn1, Slapi_RDN *rdn2)
{
    int r = 1;
    int n1 = slapi_rdn_get_num_components(rdn1);
    int n2 = slapi_rdn_get_num_components(rdn2);
    if (n1 == n2) {
        char *type, *value;
        int i = slapi_rdn_get_first(rdn1, &type, &value);
        while (r == 1 && i != -1) {
            r = slapi_rdn_contains(rdn2, type, value, strlen(value));
            i = slapi_rdn_get_next(rdn1, i, &type, &value);
        }
        if (r == 1) /* All rdn1's rdn components were in rdn2 */
        {
            r = 0; /* SAME */
        } else {
            r = -1; /* NOT SAME */
        }
    } else {
        r = -1; /* NOT SAME */
    }
    return r;
}

const char *
slapi_rdn_get_rdn(const Slapi_RDN *srdn)
{
    return srdn->rdn;
}

/*
 * if src is set, make a copy and return in inplace
 * if *inplace is set, try to use that in place, or
 * free it and set to a new value
 */
static void
normalize_case_helper(const char *copy, char **inplace)
{
    int rc;
    char **newdnaddr = NULL;
    char *newdn = NULL;
    char *dest = NULL;
    size_t dest_len = 0;

    if (!inplace) { /* no place to put result */
        return;
    }

    if (!copy && !*inplace) { /* no string to operate on */
        return;
    }

    if (copy) {
        newdn = slapi_ch_strdup(copy);
        newdnaddr = &newdn;
    } else {
        newdnaddr = inplace;
    }

    rc = slapi_dn_normalize_case_ext(*newdnaddr, 0, &dest, &dest_len);
    if (rc < 0) {
        /* we give up, just case normalize in place */
        slapi_dn_ignore_case(*newdnaddr); /* ignore case */
    } else if (rc == 0) {
        /* dest points to *newdnaddr - normalized in place */
        *(dest + dest_len) = '\0';
    } else {
        /* dest is a new string */
        slapi_ch_free_string(newdnaddr);
        *newdnaddr = dest;
    }

    *inplace = *newdnaddr;
    return;
}

/* srdn is updated in the function, it cannot be const */
const char *
slapi_rdn_get_nrdn(Slapi_RDN *srdn)
{
    if (NULL == srdn || NULL == srdn->rdn) {
        return NULL;
    }
    if (NULL == srdn->nrdn) {
        if (srdn->all_nrdns && srdn->all_nrdns[0]) {
            srdn->nrdn = slapi_ch_strdup(srdn->all_nrdns[0]);
        } else if (srdn->all_rdns && srdn->all_rdns[0]) {
            srdn->nrdn = slapi_ch_strdup(srdn->all_rdns[0]);
            slapi_dn_ignore_case(srdn->nrdn);
        } else {
            normalize_case_helper(srdn->rdn, &srdn->nrdn);
        }
    }
    return (const char *)srdn->nrdn;
}

/*
 * Get the leaf (first) rdn from rdns or nrdns array depending on the flag
 *
 * flag: FLAG_ALL_RDNS -- raw (not normalized)
 *     : FLAG_ALL_NRDNS -- normalized
 *
 * Output: first rdn
 *
 * Return value: the index of the first rdn.
 *             : -1, if failed
 */
int
slapi_rdn_get_first_ext(Slapi_RDN *srdn, const char **firstrdn, int flag)
{
    char **ptr = NULL;
    int idx = -1;

    if (NULL == firstrdn) {
        return idx;
    }
    *firstrdn = NULL;
    if (NULL == srdn) {
        return idx;
    }

    if (FLAG_ALL_RDNS == flag) {
        ptr = srdn->all_rdns;
    } else if (FLAG_ALL_NRDNS == flag) {
        if (NULL == srdn->all_nrdns) {
            srdn->all_nrdns = charray_dup(srdn->all_rdns);
            for (ptr = srdn->all_nrdns; ptr && *ptr; ptr++) {
                normalize_case_helper(NULL, ptr);
            }
        }
        ptr = srdn->all_nrdns;
    }
    if (ptr) {
        *firstrdn = *ptr;
        idx = 0;
    }

    return idx;
}

/*
 * Get the top (last) rdn from rdns or nrdns array depending on the flag
 *
 * flag: FLAG_ALL_RDNS -- raw (not normalized)
 *     : FLAG_ALL_NRDNS -- normalized
 *
 * Output: last rdn
 *
 * Return value: the index of the last rdn.
 *             : -1, if failed
 */
int
slapi_rdn_get_last_ext(Slapi_RDN *srdn, const char **lastrdn, int flag)
{
    char **ptr = NULL;
    int idx = -1;

    if (NULL == lastrdn) {
        return idx;
    }
    *lastrdn = NULL;
    if (NULL == srdn) {
        return idx;
    }

    if (FLAG_ALL_RDNS == flag) {
        ptr = srdn->all_rdns;
    } else if (FLAG_ALL_NRDNS == flag) {
        if (NULL == srdn->all_nrdns) {
            srdn->all_nrdns = charray_dup(srdn->all_rdns);
            for (ptr = srdn->all_nrdns; ptr && *ptr; ptr++) {
                normalize_case_helper(NULL, ptr);
            }
        }
        ptr = srdn->all_nrdns;
    }
    if (ptr) {
        for (; ptr && *ptr; ptr++)
            idx++;
        ptr--;
    }
    if (ptr) {
        *lastrdn = *ptr;
    }

    return idx;
}

/*
 * Get the previous rdn of the given index (idx) from rdns or nrdns array
 * depending on the flag -> rdn
 *
 * flag: FLAG_ALL_RDNS -- raw (not normalized)
 *     : FLAG_ALL_NRDNS -- normalized
 *
 * Output: prevrdn
 *
 * Return value: the index of the returned rdn.
 *             : -1, if failed or done
 */
int
slapi_rdn_get_prev_ext(Slapi_RDN *srdn, int idx, const char **prevrdn, int flag)
{
    int rc = -1;

    if (NULL == prevrdn) {
        return rc;
    }
    *prevrdn = NULL;
    if (NULL == srdn || idx <= 0) {
        return rc;
    }

    if (FLAG_ALL_RDNS == flag) {
        *prevrdn = srdn->all_rdns[idx - 1];
        rc = idx - 1;
    } else if (FLAG_ALL_NRDNS == flag) {
        *prevrdn = srdn->all_nrdns[idx - 1];
        rc = idx - 1;
    }

    return rc;
}

/*
 * Get the next rdn of the given index (idx) from rdns or nrdns array
 * depending on the flag -> rdn
 *
 * flag: FLAG_ALL_RDNS -- raw (not normalized)
 *     : FLAG_ALL_NRDNS -- normalized
 *
 * Output: nextrdn
 *
 * Return value: the index of the returned rdn.
 *             : -1, if failed or done
 */
int
slapi_rdn_get_next_ext(Slapi_RDN *srdn, int idx, const char **nextrdn, int flag)
{
    int rc = -1;

    if (NULL == nextrdn) {
        return rc;
    }
    *nextrdn = NULL;
    if (NULL == srdn || idx < 0) {
        return rc;
    }

    if (FLAG_ALL_RDNS == flag) {
        *nextrdn = srdn->all_rdns[idx + 1];
        rc = idx + 1;
    } else if (FLAG_ALL_NRDNS == flag) {
        *nextrdn = srdn->all_nrdns[idx + 1];
        rc = idx + 1;
    }

    return rc;
}

/*
 * addrdn is going to be freed when rdn is freed if byref is 0
 * if byref is non 0, the caller should not free it.
 */
int
slapi_rdn_add_rdn_to_all_rdns(Slapi_RDN *srdn, char *addrdn, int byref)
{
    if (NULL == srdn || NULL == addrdn || '\0' == *addrdn) {
        return -1;
    }
    charray_add(&(srdn->all_rdns), byref ? addrdn : slapi_ch_strdup(addrdn));
    return 0;
}

int
slapi_rdn_add_srdn_to_all_rdns(Slapi_RDN *srdn, Slapi_RDN *addsrdn)
{
    if (NULL == srdn || NULL == addsrdn) {
        return -1;
    }
    if (NULL == srdn->rdn) {
        srdn->rdn = slapi_ch_strdup(addsrdn->rdn);
    }
    charray_merge(&(srdn->all_rdns), addsrdn->all_rdns, 1 /* copy */);
    return 0;
}

/*
 * Get estimated DN length from all_rdns
 * If srdn is NULL or srdn does not have all_rdns, it returns -1;
 */
int
slapi_rdn_get_dn_len(Slapi_RDN *srdn)
{
    size_t len = -1;
    char **rdnp = NULL;

    if (NULL == srdn || NULL == srdn->all_rdns) {
        return len;
    }
    len = 0;
    for (rdnp = srdn->all_rdns; rdnp && *rdnp; rdnp++) {
        len += strlen(*rdnp) + 1; /* 1 for ',' */
    }
    len += 1;

    return len;
}

/*
 * Generate DN string from all_rdns
 * If srdn is NULL or srdn does not have all_rdns, it returns -1;
 */
int
slapi_rdn_get_dn(Slapi_RDN *srdn, char **dn)
{
    size_t len = 0;
    char **rdnp = NULL;
    char *ptr = NULL;
    char *enddn = NULL;

    if (NULL == srdn || NULL == srdn->all_rdns || NULL == dn) {
        return -1;
    }

    len = slapi_rdn_get_dn_len(srdn);
    *dn = (char *)slapi_ch_malloc(len);
    enddn = *dn + len - 1;
    ptr = *dn;
    for (rdnp = srdn->all_rdns; rdnp && *rdnp; rdnp++) {
        size_t mylen = strlen(*rdnp) + 1;
        if (ptr + mylen > enddn) {
            slapi_ch_free_string(dn);
            *dn = NULL;
            return -1;
        }
        PR_snprintf(ptr, len, "%s,", *rdnp);
        len -= mylen;
        ptr += mylen;
    }
    ptr = strrchr(*dn, ',');
    if (ptr) {
        *ptr = '\0';
        return 0;
    } else {
        slapi_ch_free_string(dn);
        *dn = NULL;
        return -1;
    }
}

int
slapi_srdn_copy(const Slapi_RDN *from, Slapi_RDN *to)
{
    if (NULL == from || NULL == to) {
        return -1;
    }
    slapi_rdn_done(to);
    to->rdn = slapi_ch_strdup(from->rdn);
    to->rdns = charray_dup(from->rdns);
    to->all_rdns = charray_dup(from->all_rdns);
    to->all_nrdns = charray_dup(from->all_nrdns);
    return 0;
}

int
slapi_rdn_replace_rdn(Slapi_RDN *srdn, char *new_rdn)
{
    if (NULL == srdn) {
        return -1;
    }

    slapi_ch_free_string(&(srdn->rdn));
    slapi_ch_free_string(&(srdn->nrdn));
    srdn->rdn = slapi_ch_strdup(new_rdn);
    normalize_case_helper(new_rdn, &srdn->nrdn);

    if (srdn->all_rdns) {
        slapi_ch_free_string(&(srdn->all_rdns[0]));
        srdn->all_rdns[0] = slapi_ch_strdup(srdn->rdn);
    }
    if (srdn->all_nrdns) {
        slapi_ch_free_string(&(srdn->all_nrdns[0]));
        srdn->all_nrdns[0] = slapi_ch_strdup(srdn->nrdn);
    }

    return 0;
}

int
slapi_rdn_partial_dup(Slapi_RDN *from, Slapi_RDN **to, int rdnidx)
{
    char **ptr = NULL;
    int lastidx = -1;

    if (NULL == from || NULL == to || rdnidx < 0) {
        return -1;
    }
    *to = NULL;

    for (ptr = from->all_rdns; ptr && *ptr; ptr++)
        lastidx++;
    if (rdnidx > lastidx) {
        return -1;
    }

    if (NULL == from->all_nrdns) {
        from->all_nrdns = charray_dup(from->all_rdns);
        for (ptr = from->all_nrdns; ptr && *ptr; ptr++) {
            normalize_case_helper(NULL, ptr);
        }
    }

    *to = slapi_rdn_new();

    (*to)->rdn = slapi_ch_strdup(from->all_rdns[rdnidx]);
    (*to)->nrdn = slapi_ch_strdup(from->all_nrdns[rdnidx]);
    (*to)->all_rdns = charray_dup(&(from->all_rdns[rdnidx]));
    (*to)->all_nrdns = charray_dup(&(from->all_nrdns[rdnidx]));
    return 0;
}

size_t
slapi_rdn_get_size(Slapi_RDN *srdn)
{
    size_t sz = 0;
    char **ptr;

    if (!srdn) {
        goto bail;
    }
    sz = sizeof(Slapi_RDN);
    if (srdn->rdn) {
        sz += strlen(srdn->rdn) + 1;
    }
    if (srdn->nrdn) {
        sz += strlen(srdn->nrdn) + 1;
    }
    if (srdn->rdns) {
        for (ptr = srdn->rdns; ptr && *ptr; ptr++) {
            sz += strlen(*ptr) + 1;
        }
    }
    if (srdn->all_rdns) {
        for (ptr = srdn->all_rdns; ptr && *ptr; ptr++) {
            sz += strlen(*ptr) + 1;
        }
    }
    if (srdn->all_nrdns) {
        for (ptr = srdn->all_nrdns; ptr && *ptr; ptr++) {
            sz += strlen(*ptr) + 1;
        }
    }
bail:
    return sz;
}

char *
slapi_rdn_get_value(const char *rdn)
{
    char *p = PL_strchr(rdn, '=');
    if (p) {
        p++;
        while (isspace(*p))
            p++;
        p = slapi_ch_strdup(p);
    }
    return p;
}

char *
slapi_rdn_get_value_by_ref(const char *rdn)
{
    char *p = PL_strchr(rdn, '=');
    if (p) {
        p++;
        while (isspace(*p))
            p++;
    }
    return p;
}
