+/****f* silcutil/SilcBufferAPI/silc_buffer_senlarge
+ *
+ * SYNOPSIS
+ *
+ * static inline
+ * SilcBuffer silc_buffer_senlarge(SilcStack stack, SilcBuffer sb,
+ * SilcUInt32 size);
+ *
+ * DESCRIPTION
+ *
+ * Enlarges the buffer by the amount of `size' if it doesn't have that
+ * must space in the data area and in the tail area. Moves the tail
+ * area automatically after enlarging so that the current data area
+ * is at least the size of `size'. If there is more space than `size'
+ * in the data area this does not do anything. If there is enough
+ * space in the tail area this merely moves the tail area to reveal
+ * the extra space. Returns FALSE on error.
+ *
+ * This routine use SilcStack are memory source. If `stack' is NULL
+ * reverts back to normal allocating routine.
+ *
+ ***/
+
+static inline
+SilcBool silc_buffer_senlarge(SilcStack stack, SilcBuffer sb, SilcUInt32 size)
+{
+ if (size > silc_buffer_len(sb)) {
+ if (size > silc_buffer_taillen(sb) + silc_buffer_len(sb))
+ if (silc_unlikely(!silc_buffer_srealloc(stack, sb,
+ silc_buffer_truelen(sb) +
+ (size - silc_buffer_taillen(sb) -
+ silc_buffer_len(sb)))))
+ return FALSE;
+ silc_buffer_pull_tail(sb, size - silc_buffer_len(sb));
+ }
+ return TRUE;
+}
+