1 files changed, 138 insertions, 0 deletions
diff --git a/tests/test25.c b/tests/test25.c
new file mode 100644
index 000000000..22e3761d8
--- /dev/null
+++ b/tests/test25.c
@@ -0,0 +1,138 @@
+#include <stdio.h>
+#include "utlist.h"
+
+typedef struct el {
+    int id;
+    struct el *next, *prev;
+} el;
+
+int main()
+{
+    int i;
+    int count;
+    el els[10], *e;
+    el *head = NULL;
+    for(i=0; i<10; i++) {
+        els[i].id=(int)'a'+i;
+    }
+
+    /* test CDL macros */
+    printf("CDL macros\n");
+    CDL_PREPEND(head,&els[0]);
+    CDL_PREPEND(head,&els[1]);
+    CDL_PREPEND(head,&els[2]);
+    CDL_FOREACH(head,e) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+    CDL_COUNT(head,e, count);
+    printf("count = %d\n", count);
+
+    /* point head to head->next */
+    printf("advancing head pointer\n");
+    head = head->next;
+    CDL_FOREACH(head,e) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+
+    /* follow circular loop a few times */
+    for(i=0,e=head; e && i<10; i++,e=e->next) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+
+    /* follow circular loop backwards a few times */
+    for(i=0,e=head; e && i<10; i++,e=e->prev) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+
+    printf("deleting b\n");
+    CDL_DELETE(head,&els[1]);
+    CDL_FOREACH(head,e) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+    printf("deleting (a)\n");
+    CDL_DELETE(head,&els[0]);
+    CDL_FOREACH(head,e) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+    printf("deleting (c)\n");
+    CDL_DELETE(head,&els[2]);
+    CDL_FOREACH(head,e) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+
+    /* test DL macros */
+    printf("DL macros\n");
+    DL_APPEND(head,&els[0]);
+    DL_APPEND(head,&els[1]);
+    DL_APPEND(head,&els[2]);
+    DL_FOREACH(head,e) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+    DL_COUNT(head,e, count);
+    printf("count = %d\n", count);
+
+    printf("deleting tail c\n");
+    DL_DELETE(head,&els[2]);
+    DL_FOREACH(head,e) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+
+    printf("deleting head a\n");
+    DL_DELETE(head,&els[0]);
+    DL_FOREACH(head,e) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+
+    printf("deleting head b\n");
+    DL_DELETE(head,&els[1]);
+    DL_FOREACH(head,e) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+
+    /* test LL macros */
+    printf("LL macros\n");
+    LL_APPEND(head,&els[0]);
+    LL_APPEND(head,&els[1]);
+    LL_APPEND(head,&els[2]);
+    LL_FOREACH(head,e) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+
+    LL_COUNT(head,e,count);
+    printf("count = %d\n", count);
+
+    printf("deleting tail c\n");
+    LL_DELETE(head,&els[2]);
+    LL_FOREACH(head,e) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+
+    printf("deleting head a\n");
+    LL_DELETE(head,&els[0]);
+    LL_FOREACH(head,e) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+
+    printf("deleting head b\n");
+    LL_DELETE(head,&els[1]);
+    LL_FOREACH(head,e) {
+        printf("%c ", e->id);
+    }
+    printf("\n");
+
+    return 0;
+}