Initial BFD commit, work in progress.

lib/resource.c

@@ -366,21 +366,21 @@ mb_allocz(pool *p, unsigned size)
 
 /**
  * mb_realloc - reallocate a memory block
- * @p: pool
  * @m: memory block
  * @size: new size of the block
  *
  * mb_realloc() changes the size of the memory block @m to a given size.
  * The contents will be unchanged to the minimum of the old and new sizes;
- * newly allocated memory will be uninitialized. If @m is NULL, the call
- * is equivalent to mb_alloc(@p, @size).
+ * newly allocated memory will be uninitialized. Contrary to realloc()
+ * behavior, @m must be non-NULL, because the resource pool is inherited
+ * from it.
  *
  * Like mb_alloc(), mb_realloc() also returns a pointer to the memory
- * chunk , not to the resource, hence you have to free it using
+ * chunk, not to the resource, hence you have to free it using
  * mb_free(), not rfree().
  */
 void *
-mb_realloc(pool *p, void *m, unsigned size)
+mb_realloc(void *m, unsigned size)
 {
   struct mblock *ob = NULL;
 
@@ -392,9 +392,7 @@ mb_realloc(pool *p, void *m, unsigned size)
     }
 
   struct mblock *b = xrealloc(ob, sizeof(struct mblock) + size);
-
-  b->r.class = &mb_class;
-  add_tail(&p->inside, &b->r.n);
+  replace_node(&b->r.n, &b->r.n);
   b->size = size;
   return b->data;
 }
@@ -413,3 +411,18 @@ mb_free(void *m)
   rfree(b);
 }
 
+
+
+#define STEP_UP(x) ((x) + (x)/2 + 4)
+
+void
+buffer_realloc(void **buf, unsigned *size, unsigned need, unsigned item_size)
+{
+  unsigned nsize = MIN(*size, need);
+
+  while (nsize < need)
+    nsize = STEP_UP(nsize);
+
+  *buf = mb_realloc(*buf, nsize*isize);
+  *size = nsize;
+}