From: Denis Ovsienko <denis@ovsienko.info>
Date: Mon, 9 Dec 2024 23:02:10 +0000 (+0000)
Subject: In gencode.c use SWAPLONG() from pcap-util.h.
X-Git-Url: https://git.tcpdump.org/libpcap/commitdiff_plain/4fc98f5dd4c64a98de233abec602b59601280204

In gencode.c use SWAPLONG() from pcap-util.h.

Add a header guard to pcap-util.h while at it.
---

diff --git a/gencode.c b/gencode.c
index 3ddd8b4c..7cd144cd 100644
--- a/gencode.c
+++ b/gencode.c
@@ -47,6 +47,7 @@
 #include "pcap/sll.h"
 #include "pcap/ipnet.h"
 #include "diag-control.h"
+#include "pcap-util.h"
 
 #include "scanner.h"
 
@@ -2097,14 +2098,6 @@ gen_false(compiler_state_t *cstate)
 	return gen_uncond(cstate, 0);
 }
 
-/*
- * Byte-swap a 32-bit number.
- * ("htonl()" or "ntohl()" won't work - we want to byte-swap even on
- * big-endian platforms.)
- */
-#define	SWAPLONG(y) \
-((((y)&0xff)<<24) | (((y)&0xff00)<<8) | (((y)&0xff0000)>>8) | (((y)>>24)&0xff))
-
 /*
  * Generate code to match a particular packet type.
  *
diff --git a/pcap-util.h b/pcap-util.h
index 5b40e45b..7c4d88c8 100644
--- a/pcap-util.h
+++ b/pcap-util.h
@@ -21,6 +21,9 @@
  * pcap-util.h - common code for various files
  */
 
+#ifndef pcap_util_h
+#define pcap_util_h
+
 /*
  * We use the "receiver-makes-right" approach to byte order;
  * because time is at a premium when we are writing the file.
@@ -49,3 +52,5 @@
 
 extern void pcapint_post_process(int linktype, int swapped,
     struct pcap_pkthdr *hdr, u_char *data);
+
+#endif // pcap_util_h