krb5/ldap_util/kdb5_ldap_list.c

54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf#pragma ident   "%Z%%M% %I% %E% SMI"
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf/*
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * kadmin/ldap_util/kdb5_ldap_list.c
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf/* Copyright (c) 2004-2005, Novell, Inc.
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * All rights reserved.
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf *
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * Redistribution and use in source and binary forms, with or without
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * modification, are permitted provided that the following conditions are met:
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf *
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf *   * Redistributions of source code must retain the above copyright notice,
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf *       this list of conditions and the following disclaimer.
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf *   * Redistributions in binary form must reproduce the above copyright
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf *       notice, this list of conditions and the following disclaimer in the
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf *       documentation and/or other materials provided with the distribution.
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf *   * The copyright holder's name is not used to endorse or promote products
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf *       derived from this software without specific prior written permission.
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf *
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * POSSIBILITY OF SUCH DAMAGE.
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf/*
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * Miscellaneous functions for managing the string and integer lists
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf#include <k5-int.h>
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf#include "kdb5_ldap_list.h"
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf/*
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * Counts the number of entries in the given array of strings
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillfint list_count_str_array(char **list)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf{
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    int i = 0;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    if (list == NULL)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    return 0;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    for (i = 0; *list != NULL; list++) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    i++;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    return i;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf}
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf/*
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * Counts the number of entries in the given array of integers
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillfint list_count_int_array(int *list)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf{
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    int i = 0;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    if (list == NULL)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    return 0;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    for (i = 0; *list != END_OF_LIST; list++) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    i++;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    return i;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf}
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf/*
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * Frees the entries in a given list and not the list pointer
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillfvoid krb5_free_list_entries(list)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    char **list;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf{
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    if (list == NULL)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    return;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    for (; *list != NULL; list++) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    free(*list);
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    *list = NULL;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    return;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf}
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf/*
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * Tokenize the given string based on the delimiter provided
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * and return the result as a list
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillfkrb5_error_code
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillfkrb5_parse_list(buffer, delimiter, list)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    char *buffer;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    char *delimiter;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    char **list;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf{
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    char *str = NULL;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    char *token = NULL;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    char *ptrptr = NULL;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    char **plist = list;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    krb5_error_code retval = 0;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    int count = 0;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    if ((buffer == NULL) || (list == NULL) || (delimiter == NULL)) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    return EINVAL;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    str = strdup(buffer);
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    if (str == NULL)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    return ENOMEM;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    token = strtok_r(str, delimiter, &ptrptr);
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    for (count = 1; ((token != NULL) && (count < MAX_LIST_ENTRIES));
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf     plist++, count++) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    *plist = strdup(token);
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    if (*plist == NULL) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        retval = ENOMEM;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        goto cleanup;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    token = strtok_r(NULL, delimiter, &ptrptr);
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    *plist = NULL;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillfcleanup:
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    if (str) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    free(str);
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    str = NULL;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    if (retval)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    krb5_free_list_entries(list);
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    return retval;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf}
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillfint compare_int(m1, m2)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    const void *m1;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    const void *m2;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf{
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    int mi1 = *(const int *)m1;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    int mi2 = *(const int *)m2;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    return (mi1 - mi2);
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf}
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf/*
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * Modifies the destination list to contain or not to contain the
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * entries present in the source list, depending on the mode
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * (ADD or DELETE).
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillfvoid list_modify_str_array(destlist, sourcelist, mode)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    char ***destlist;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    const char **sourcelist;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    int mode;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf{
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    char **dlist = NULL, **tmplist = NULL;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    const char **slist = NULL;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    int dcount = 0, scount = 0, copycount = 0;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    int found = 0;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    if ((destlist == NULL) || (*destlist == NULL) || (sourcelist == NULL))
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    return;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    /* We need to add every entry present in the source list to
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf     * the destination list */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    if (mode == LIST_MODE_ADD) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    /* Traverse throught the end of destlist for appending */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    for (dlist = *destlist, dcount = 0; *dlist != NULL;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf         dlist++, dcount++) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        ;   /* NULL statement */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    /* Count the number of entries in the source list */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    for (slist = sourcelist, scount = 0; *slist != NULL;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf         slist++, scount++) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        ;   /* NULL statement */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    /* Reset the slist pointer to the start of source list */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    slist = sourcelist;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    /* Now append the source list to the existing destlist */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    if ((dcount + scount) < MAX_LIST_ENTRIES)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        copycount = scount;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    else
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        /* Leave the last entry for list terminator(=NULL) */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        copycount = (MAX_LIST_ENTRIES -1) - dcount;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    memcpy(dlist, slist, (sizeof(char *) * copycount));
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    dlist += copycount;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    *dlist = NULL;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    } else if (mode == LIST_MODE_DELETE) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    /* We need to delete every entry present in the source list
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf     * from the destination list */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    for (slist = sourcelist; *slist != NULL; slist++) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        for (dlist = *destlist; *dlist != NULL; dlist++) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        found = 0; /* value not found */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        /* DN is case insensitive string */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        if (strcasecmp(*dlist, *slist) == 0) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf            found = 1;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf            free(*dlist);
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf            /* Advance the rest of the entries by one */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf            for (tmplist = dlist; *tmplist != NULL; tmplist++) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf            *tmplist = *(tmplist+1);
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf            }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf            break;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    return;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf}
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf/*
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * Modifies the destination list to contain or not to contain the
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * entries present in the source list, depending on the mode
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf * (ADD or DELETE). where the list is array of integers.
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillfint list_modify_int_array(destlist, sourcelist, mode)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    int *destlist;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    const int *sourcelist;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    int mode;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf{
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    int *dlist = NULL, *tmplist = NULL;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    const int *slist = NULL;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    int dcount = 0, scount = 0, copycount = 0;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    int tcount = 0;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    if ((destlist == NULL) || (sourcelist == NULL))
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    return 0;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    /* We need to add every entry present in the source list to the
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf     * destination list */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    if (mode == LIST_MODE_ADD) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    /* Traverse throught the end of destlist for appending */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    for (dlist = destlist, dcount = 0; *dlist != END_OF_LIST;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf         dlist++, dcount++)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        ;   /* NULL statement */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    /* Count the number of entries in the source list */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    for (slist = sourcelist, scount = 0; *slist != END_OF_LIST;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf         slist++, scount++)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        ;   /* NULL statement */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    /* Reset the slist pointer to the start of source list */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    slist = sourcelist;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    /* Now append the source list to the existing destlist */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    if ((dcount + scount) < MAX_LIST_ENTRIES)
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        copycount = scount;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    else
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        /* Leave the last entry for list terminator(=NULL) */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        copycount = (MAX_LIST_ENTRIES -1) - dcount;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    memcpy(dlist, slist, (sizeof(int) * copycount));
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    dlist += copycount;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    *dlist = END_OF_LIST;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    tcount = dcount + copycount;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    } else if (mode == LIST_MODE_DELETE) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    /* We need to delete every entry present in the source list from
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf     * the destination list */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    for (slist = sourcelist; *slist != END_OF_LIST; slist++) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        for (dlist = destlist; *dlist != END_OF_LIST; dlist++) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        if (*dlist == *slist) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf            /* Advance the rest of the entries by one */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf            for (tmplist = dlist; *tmplist != END_OF_LIST; tmplist++) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf            *tmplist = *(tmplist+1);
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf            }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf            break;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    /* count the number of entries */
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    for (dlist = destlist, tcount = 0; *dlist != END_OF_LIST; dlist++) {
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf        tcount++;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    }
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf    return tcount;
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf}
54925bf60766fbb4f1f2d7c843721406a7b7a3fbwillf