Initial version.

src/nxt_array.c

@@ -0,0 +1,96 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#include <nxt_main.h>
+
+
+nxt_array_t *
+nxt_array_create(nxt_mem_pool_t *mp, nxt_uint_t n, size_t size)
+{
+    nxt_array_t  *array;
+
+    array = nxt_mem_alloc(mp, sizeof(nxt_array_t) + n * size);
+
+    if (nxt_slow_path(array == NULL)) {
+        return NULL;
+    }
+
+    array->elts = (char *) array + sizeof(nxt_array_t);
+    array->nelts = 0;
+    array->size = size;
+    array->nalloc = n;
+    array->mem_pool = mp;
+
+    return array;
+}
+
+
+void *
+nxt_array_add(nxt_array_t *array)
+{
+    void      *p;
+    uint32_t  nalloc, new_alloc;
+
+    nalloc = array->nalloc;
+
+    if (array->nelts == nalloc) {
+
+        if (nalloc < 16) {
+            /* Allocate new array twice larger than current. */
+            new_alloc = nalloc * 2;
+
+        } else {
+            /* Allocate new array 1.5 times larger than current. */
+            new_alloc = nalloc + nalloc / 2;
+        }
+
+        p = nxt_mem_alloc(array->mem_pool, array->size * new_alloc);
+
+        if (nxt_slow_path(p == NULL)) {
+            return NULL;
+        }
+
+        nxt_memcpy(p, array->elts, array->size * nalloc);
+
+        array->elts = p;
+        array->nalloc = new_alloc;
+    }
+
+    p = (char *) array->elts + array->size * array->nelts;
+    array->nelts++;
+
+    return p;
+}
+
+
+void *
+nxt_array_zero_add(nxt_array_t *array)
+{
+    void  *p;
+
+    p = nxt_array_add(array);
+
+    if (nxt_fast_path(p != NULL)) {
+        nxt_memzero(p, array->size);
+    }
+
+    return p;
+}
+
+
+void
+nxt_array_remove(nxt_array_t *array, void *elt)
+{
+    void  *last;
+
+    last = nxt_array_last(array);
+
+    if (elt != last) {
+        nxt_memcpy(elt, last, array->size);
+    }
+
+    array->nelts--;
+}