ucx: ucx/list.c@1031dd910f8e (annotated)

ucx/list.c@1031dd910f8e (annotated)

ucx/list.c

Thu, 10 Apr 2014 11:18:12 +0200

author: Mike Becker <universe@uap-core.de>
date: Thu, 10 Apr 2014 11:18:12 +0200
changeset 161: 1031dd910f8e
parent 128: b79b1ce438dd
child 172: 7084e8e8433c
permissions: -rw-r--r--

fixed ucx_list_remove crashing when removing the last element of a list

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
  * Copyright 2013 Olaf Wintermann. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *   1. Redistributions of source code must retain the above copyright
  *      notice, this list of conditions and the following disclaimer.
  *
  *   2. Redistributions in binary form must reproduce the above copyright
  *      notice, this list of conditions and the following disclaimer in the
  *      documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include "list.h"
 UcxList *ucx_list_clone(UcxList *l, copy_func fnc, void *data) {
     return ucx_list_clone_a(ucx_default_allocator(), l, fnc, data);
 }
 UcxList *ucx_list_clone_a(UcxAllocator *alloc, UcxList *l,
         copy_func fnc, void *data) {
     UcxList *ret = NULL;
     while (l) {
         if (fnc) {
             ret = ucx_list_append_a(alloc, ret, fnc(l->data, data));
         } else {
             ret = ucx_list_append_a(alloc, ret, l->data);
         }
         l = l->next;
     }
     return ret;
 }
 int ucx_list_equals(const UcxList *l1, const UcxList *l2,
         cmp_func fnc, void* data) {
     if (l1 == l2) return 1;
     while (l1 != NULL && l2 != NULL) {
         if (fnc == NULL) {
             if (l1->data != l2->data) return 0;
         } else {
             if (fnc(l1->data, l2->data, data) != 0) return 0;
         }
         l1 = l1->next;
         l2 = l2->next;
     }
     return (l1 == NULL && l2 == NULL);
 }
 void ucx_list_free(UcxList *l) {
     ucx_list_free_a(ucx_default_allocator(), l);
 }
 void ucx_list_free_a(UcxAllocator *alloc, UcxList *l) {
     UcxList *e = l, *f;
     while (e != NULL) {
         f = e;
         e = e->next;
         alloc->free(alloc->pool, f);
     }
 }
 UcxList *ucx_list_append(UcxList *l, void *data)  {
     return ucx_list_append_a(ucx_default_allocator(), l, data);
 }
 UcxList *ucx_list_append_a(UcxAllocator *alloc, UcxList *l, void *data)  {
     UcxList *nl = (UcxList*) alloc->malloc(alloc->pool, sizeof(UcxList));
     if (!nl) {
         return NULL;
     }
     nl->data = data;
     nl->next = NULL;
     if (l) {
         UcxList *t = ucx_list_last(l);
         t->next = nl;
         nl->prev = t;
         return l;
     } else {
         nl->prev = NULL;
         return nl;
     }
 }
 UcxList *ucx_list_prepend(UcxList *l, void *data) {
     return ucx_list_prepend_a(ucx_default_allocator(), l, data);
 }
 UcxList *ucx_list_prepend_a(UcxAllocator *alloc, UcxList *l, void *data) {
     UcxList *nl = ucx_list_append_a(alloc, NULL, data);
     if (!nl) {
         return NULL;
     }
     l = ucx_list_first(l);
     if (l) {
         nl->next = l;
         l->prev = nl;
     }
     return nl;
 }
 UcxList *ucx_list_concat(UcxList *l1, UcxList *l2) {
     if (l1) {
         UcxList *last = ucx_list_last(l1);
         last->next = l2;
         l2->prev = last;
         return l1;
     } else {
         return l2;
     }
 }
 UcxList *ucx_list_last(const UcxList *l) {
     if (l == NULL) return NULL;
     const UcxList *e = l;
     while (e->next != NULL) {
         e = e->next;
     }
     return (UcxList*)e;
 }
 ssize_t ucx_list_indexof(const UcxList *list, const UcxList *elem) {
     ssize_t index = 0;
     while (list) {
         if (list == elem) {
             return index;
         }
         list = list->next;
         index++;
     }
     return -1;
 }
 UcxList *ucx_list_get(const UcxList *l, int index) {
     if (l == NULL) return NULL;
     const UcxList *e = l;
     while (e->next && index > 0) {
         e = e->next;
         index--;
     }
     return (UcxList*)(index == 0 ? e : NULL);
 }
 ssize_t ucx_list_find(UcxList *l, void *elem, cmp_func fnc, void *cmpdata) {
     ssize_t index = 0;
     UCX_FOREACH(e, l) {
         if (fnc) {
             if (fnc(elem, e->data, cmpdata) == 0) {
                 return index;
             }
         } else {
             if (elem == e->data) {
                 return index;
             }
         }
         index++;
     }
     return -1;
 }
 int ucx_list_contains(UcxList *l, void *elem, cmp_func fnc, void *cmpdata) {
     return ucx_list_find(l, elem, fnc, cmpdata) > -1;
 }
 size_t ucx_list_size(const UcxList *l) {
     if (l == NULL) return 0;
     const UcxList *e = l;
     size_t s = 1;
     while (e->next != NULL) {
         e = e->next;
         s++;
     }
     return s;
 }
 UcxList *ucx_list_sort_merge(int length,
         UcxList* restrict ls, UcxList* restrict le, UcxList* restrict re,
         cmp_func fnc, void* data) {
     UcxList** sorted = (UcxList**) malloc(sizeof(UcxList*)*length);
     UcxList *rc, *lc;
     lc = ls; rc = le;
     int n = 0;
     while (lc && lc != le && rc != re) {
         if (fnc(lc->data, rc->data, data) <= 0) {
             sorted[n] = lc;
             lc = lc->next;
         } else {
             sorted[n] = rc;
             rc = rc->next;
         }
         n++;
     }
     while (lc && lc != le) {
         sorted[n] = lc;
         lc = lc->next;
         n++;
     }
     while (rc && rc != re) {
         sorted[n] = rc;
         rc = rc->next;
         n++;
     }
     // Update pointer
     sorted[0]->prev = NULL;
     for (int i = 0 ; i < length-1 ; i++) {
         sorted[i]->next = sorted[i+1];
         sorted[i+1]->prev = sorted[i];
     }
     sorted[length-1]->next = NULL;
     UcxList *ret = sorted[0];
     free(sorted);
     return ret;
 }
 UcxList *ucx_list_sort(UcxList *l, cmp_func fnc, void *data) {
     if (l == NULL) {
         return NULL;
     }
     UcxList *lc;
     int ln = 1;
     UcxList *restrict ls = l, *restrict le, *restrict re;
     lc = ls;
     while (lc->next != NULL && fnc(lc->next->data, lc->data, data) > 0) {
         lc = lc->next;
         ln++;
     }
     le = lc->next;
     if (le == NULL) {
         return l; // this list is already sorted :)
     } else {
         UcxList *rc;
         int rn = 1;
         rc = le;
         while (rc->next != NULL && fnc(rc->next->data, rc->data, data) > 0) {
             rc = rc->next;
             rn++;
         }
         re = rc->next;
         // Something left? Sort it!
         UcxList *remainder = re;
         size_t remainder_length = ucx_list_size(remainder);
         if (remainder != NULL) {
             remainder = ucx_list_sort(remainder, fnc, data);
         }
         // {ls,...,le->prev} and {rs,...,re->prev} are sorted - merge them
         UcxList *sorted = ucx_list_sort_merge(ln+rn,
                 ls, le, re,
                 fnc, data);
         // merge sorted list with (also sorted) remainder
         l = ucx_list_sort_merge(ln+rn+remainder_length,
                 sorted, remainder, NULL, fnc, data);
         return l;
     }
 }
 UcxList *ucx_list_first(const UcxList *l) {
     if (!l) {
         return NULL;
     }
     const UcxList *e = l;
     while (e->prev) {
         e = e->prev;
     }
     return (UcxList *)e;
 }
 UcxList *ucx_list_remove(UcxList *l, UcxList *e) {
     return ucx_list_remove_a(ucx_default_allocator(), l, e);
 }
 UcxList *ucx_list_remove_a(UcxAllocator *alloc, UcxList *l, UcxList *e) {
     if (l == e) {
         l = e->next;
     }
     if (e->next) {
         e->next->prev = e->prev;
     }
     if (e->prev) {
         e->prev->next = e->next;
     }
     alloc->free(alloc->pool, e);
     return l;
 }

Mercurial > hg > ucx / annotate

ucx/list.c@1031dd910f8e (annotated)

ucx/list.c