support limit

src/lib/xlist.c

@@ -46,6 +46,7 @@ static int xlist_ensure(xlist_t* l)
 int xlist_store(xlist_t* l, void* data)
 {
     int rc;
+    int idx;
 
     if (l == NULL) {
         return -EINVAL;
@@ -56,10 +57,26 @@ int xlist_store(xlist_t* l, void* data)
         return rc;
     }
 
-    l->data[l->count] = data;
+    idx          = l->count;
+    l->data[idx] = data;
     l->count++;
 
-    return 1;
+    return idx;
+}
+
+void* xlist_get(xlist_t* l, int idx)
+{
+    if ((l == NULL) || (idx < 0)) {
+        errno = EINVAL;
+        return NULL;
+    }
+
+    if (idx >= l->caps) {
+        errno = 0;
+        return NULL;
+    }
+
+    return (void*)l->data[idx];
 }
 
 void xlist_clear(xlist_t* l)
@@ -86,6 +103,31 @@ int xlist_iter(xlist_t* l, xlist_iter_fn_t fn, void* data)
     return 0;
 }
 
+int xlist_del(xlist_t* l, void* data)
+{
+    int i, j;
+
+    if (l == NULL) {
+        return -EINVAL;
+    }
+
+    j = -1;
+    i = 0;
+    while (i < l->count) {
+        if (l->data[i] == data) {
+            for (j = i + 1; j < l->count; j++) {
+                l->data[j - 1] = l->data[j];
+            }
+
+            l->count--;
+        } else {
+            i++;
+        }
+    }
+
+    return 1;
+}
+
 void* xlist_find(xlist_t* l, xlist_find_fn_t fn, ...)
 {
     int     i;