X-Git-Url: https://git.piment-noir.org/?p=TD_C.git;a=blobdiff_plain;f=TP_9%2Fexo2%2Fclist.c;h=2fd3dfd98f734570e2551f6a774d4af9eae9a62d;hp=0ee532f36b283d0a8795cf2b10348bf066acfb15;hb=5d64063095177554839e67ddc73193929f115d07;hpb=220a34552ecf9184ff6572e7bc472185bee26960

diff --git a/TP_9/exo2/clist.c b/TP_9/exo2/clist.c
index 0ee532f..2fd3dfd 100644
--- a/TP_9/exo2/clist.c
+++ b/TP_9/exo2/clist.c
@@ -1,23 +1,25 @@
+#include <stdio.h>
 #include <stdlib.h>
+#include <stdbool.h>
 
 #include "clist.h"
 
 link_t* list_new(int value) {
-    link_t* link_t_new;	
-    link_t_new = malloc(sizeof(link_t));
-    link_t_new->value = value;
-    link_t_new->next = NULL;
-    return link_t_new;
+    link_t* link_new;
+    link_new = malloc(sizeof(link_t));
+    link_new->value = value;
+    link_new->next = NULL;
+    return link_new;
 }
 
 link_t* list_append(link_t* head, int value) {
 
-    if (head == NULL) { 
+    if (head == NULL) {
         return head = list_new(value);
     } else {
         link_t* head_first = head;
         while (head->next != NULL) {
-    	    head = head->next; 
+            head = head->next;
         }
         head->next = list_new(value);
         return head_first;
@@ -26,49 +28,189 @@ link_t* list_append(link_t* head, int value) {
 
 link_t* list_prepend(link_t* head, int value) {
     link_t* first_link = list_new(value);
-    
+
     first_link->next = head;
     return first_link;
 }
 
+link_t* list_insert(link_t* head, unsigned index, int value) {
+
+    if (index == 0) {
+        return list_prepend(head, value);
+    } else if (index == list_count(head)) {
+        return list_append(head, value);
+    } else {
+        link_t* link_insrt = list_new(value);
+        link_t* head_first = head;
+        link_t* head_next = NULL;
+        for (unsigned i = 0; i < index-1; i++) {
+            head = head->next;
+        }
+        head_next = head->next;
+        head->next = link_insrt;
+        head = link_insrt;
+        head->next = head_next;
+        return head_first;
+    }
+}
+
+link_t* list_delete(link_t* head, unsigned index) {
+    link_t* head_prev = NULL;
+    link_t* head_next = NULL;
+    link_t* head_ret = NULL;
+
+    if (head == NULL) {
+        return NULL;
+    } else if (index == 0) {
+        head_next = head->next;
+        free(head);
+        head = head_next;
+        head_ret = head;
+    } else {
+        link_t* head_first = head;
+        for (unsigned i = 0; i < index-1; i++) {
+            head = head->next;
+        }
+        head_prev = head;
+        head = head->next;
+        head_next = head->next;
+        free(head);
+        head = head_prev;
+        head->next = head_next;
+        head_ret = head_first;
+    }
+    if (head_ret != NULL) {
+        return head_ret;
+    } else {
+        return NULL;
+    }
+}
+
+link_t* list_concat(link_t* first, link_t* second) {
+    link_t* head_first = first;
+
+    while (first->next != NULL) {
+        first = first->next;
+    }
+    first->next = second;
+    return head_first;
+}
+
+link_t* list_sort(link_t* head) {
+    int tmp;
+    bool isswaped;
+    link_t* head_first = head;
+
+    do {
+        isswaped = false;
+        while (head->next != NULL) {
+            if (head->value > head->next->value) {
+                tmp = head->value;
+                head->value = head->next->value;
+                head->next->value = tmp;
+                isswaped = true;
+            }
+            head = head->next;
+        }
+        /* Reloop at the beginning of the list until there's values swaped */
+        head = head_first;
+    } while (isswaped);
+    return head_first;
+}
+
+static link_t* _list_merge_sort(link_t* head1, link_t* head2) {
+    link_t* head_result = NULL;
+
+    if (head1 == NULL) {
+        return head2;
+    }
+    if (head2 == NULL) {
+        return head1;
+    }
+    if (head1->value < head2->value) {
+        head_result = head1;
+        head_result->next = _list_merge_sort(head1->next, head2);
+    } else {
+        head_result = head2;
+        head_result->next = _list_merge_sort(head1, head2->next);
+    }
+    return head_result;
+}
+
+link_t* list_merge_sort(link_t* head) {
+    link_t* head1;
+    link_t* head2;
+
+    if (head == NULL || head->next == NULL) {
+        return head;
+    }
+
+    head1 = head;
+    head2 = head->next;
+    while (head2 != NULL && head2->next != NULL) {
+        head = head->next;
+        head2 = head->next->next;
+    }
+    head2 = head->next;
+    head->next = NULL;
+
+    head1 = list_merge_sort(head1);
+    head2 = list_merge_sort(head2);
+    return _list_merge_sort(head1, head2);
+}
+
 unsigned list_count(link_t* head) {
-    int count = 0;
-    
-    if (head == NULL) { return count; }
-    count = 1;
-    while (head->next != NULL) {
+    unsigned count = 0;
+
+    while (head != NULL) {
         ++count;
         head = head->next;
-    } 
+    }
     return count;
 }
 
 void list_set(link_t* head, unsigned index, int value) {
+    unsigned count = 0;
 
-    //FIXME: check for the index value validity
-    for (unsigned count = 0; count < index; count++) {
+    while (head != NULL && count < index) {
+        ++count;
         head = head->next;
     }
-    head->value = value;
+    if (head != NULL) { head->value = value; }
 }
 
 int list_get(link_t* head, unsigned index) {
-    
-    if (index < list_count(head)) {
-        for (unsigned i = 0; i < index; i++) {
-            head = head->next; 
-        }
+    unsigned count = 0;
+
+    while (head != NULL && count < index) {
+        ++count;
+        head = head->next;
+    }
+    if (head != NULL) {
         return head->value;
-    } else { 
+    } else {
         return -1;
     }
 }
 
-void list_clear(link_t* link) {
+void list_clear(link_t* head) {
+    link_t* next_link = NULL;
 
-    while (link != NULL) {
-        link_t* next_link = link->next;
-        free(link);
-        link = next_link;
+    while (head != NULL) {
+        next_link = head->next;
+        free(head);
+        head = next_link;
+    }
+}
+
+void list_display_values(link_t* head) {
+    unsigned i = 0;
+
+    printf("------Begin------\n");
+    while (head != NULL) {
+        printf("value at [%d]=%d\n", i, head->value);
+        head = head->next;
+        i++;
     }
+    printf("------End------\n");
 }