From cde6d0deed1b1e27ed13cc419500a31f1a498961 Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon>
Date: Mon, 30 Apr 2007 11:56:48 +0000
Subject: [PATCH] pbuf_alloc() / pbuf_realloc(): added LWIP_DEBUG_ASSERT() and
 cast operator when assigning s32_t to u16_t to get rid of compiler warnings

---
 src/core/pbuf.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/core/pbuf.c b/src/core/pbuf.c
index fcc7383b..e476450c 100644
--- a/src/core/pbuf.c
+++ b/src/core/pbuf.c
@@ -290,9 +290,10 @@ pbuf_alloc(pbuf_layer l, u16_t length, pbuf_flag flag)
       /* make previous pbuf point to this pbuf */
       r->next = q;
       /* set total length of this pbuf and next in chain */
-      q->tot_len = rem_len;
+      LWIP_DEBUG_ASSERT("rem_len < max_u16_t",rem_len < 0xffff);
+      q->tot_len = (u16_t)rem_len;
       /* this pbuf length is pool size, unless smaller sized tail */
-      q->len = rem_len > PBUF_POOL_BUFSIZE? PBUF_POOL_BUFSIZE: rem_len;
+      q->len = rem_len > PBUF_POOL_BUFSIZE? PBUF_POOL_BUFSIZE: (u16_t)rem_len;
       q->payload = (void *)((u8_t *)q + sizeof(struct pbuf));
       LWIP_ASSERT("pbuf_alloc: pbuf q->payload properly aligned",
               ((mem_ptr_t)q->payload % MEM_ALIGNMENT) == 0);
@@ -420,7 +421,8 @@ pbuf_realloc(struct pbuf *p, u16_t new_len)
     /* decrease remaining length by pbuf length */
     rem_len -= q->len;
     /* decrease total length indicator */
-    q->tot_len += grow;
+    LWIP_DEBUG_ASSERT("grow < max_u16_t",grow < 0xffff);
+    q->tot_len += (u16_t)grow;
     /* proceed to next pbuf in chain */
     q = q->next;
   }