From 3c960cd5a26c224c4e7c507dfed9c8176cef00a3 Mon Sep 17 00:00:00 2001
From: Jeff Morriss <jeff.morriss@ulticom.com>
Date: Thu, 8 Oct 2009 14:28:23 +0000
Subject: [PATCH] As requested by Gregory Seidman on -dev: add CRC32 functions
 to libwireshark.def.  Use consistent indentation in crc32.c.

svn path=/trunk/; revision=30401
---
 epan/crc32.c          | 66 ++++++++++++++++++++++---------------------
 epan/libwireshark.def |  8 ++++++
 2 files changed, 42 insertions(+), 32 deletions(-)

diff --git a/epan/crc32.c b/epan/crc32.c
index 7ea1eb8918..bd7a023613 100644
--- a/epan/crc32.c
+++ b/epan/crc32.c
@@ -171,7 +171,8 @@ const guint32 crc32_ccitt_table[256] = {
 
 #define CRC32_CCITT_SEED    0xFFFFFFFF
 
-guint32 calculate_crc32c(const void *buf, int len, guint32 crc)
+guint32
+calculate_crc32c(const void *buf, int len, guint32 crc)
 {
 	const guint8 *p = (const guint8 *)buf;
 	crc = CRC32C_SWAP(crc);
@@ -184,63 +185,64 @@ guint32 calculate_crc32c(const void *buf, int len, guint32 crc)
 guint32
 crc32_ccitt(const guint8 *buf, guint len)
 {
-  return ( crc32_ccitt_seed(buf, len, CRC32_CCITT_SEED) );
+	return (crc32_ccitt_seed(buf, len, CRC32_CCITT_SEED));
 }
 
 guint32
 crc32_ccitt_seed(const guint8 *buf, guint len, guint32 seed)
 {
-  guint i;
-  guint32 crc32 = seed;
+	guint i;
+	guint32 crc32 = seed;
 
-  for (i = 0; i < len; i++)
-    crc32 = crc32_ccitt_table[(crc32 ^ buf[i]) & 0xff] ^ (crc32 >> 8);
+	for (i = 0; i < len; i++)
+		crc32 = crc32_ccitt_table[(crc32 ^ buf[i]) & 0xff] ^ (crc32 >> 8);
 
-  return ( ~crc32 );
+	return ( ~crc32 );
 }
 
 guint32
 crc32_ccitt_tvb(tvbuff_t *tvb, guint len)
 {
-  const guint8* buf;
+	const guint8* buf;
 
-  tvb_ensure_bytes_exist(tvb, 0, len);  /* len == -1 not allowed */
-  buf = tvb_get_ptr(tvb, 0, len);
+	tvb_ensure_bytes_exist(tvb, 0, len);  /* len == -1 not allowed */
+	buf = tvb_get_ptr(tvb, 0, len);
 
-  return ( crc32_ccitt_seed(buf, len, CRC32_CCITT_SEED) );
+	return ( crc32_ccitt_seed(buf, len, CRC32_CCITT_SEED) );
 }
 
 guint32
 crc32_ccitt_tvb_offset(tvbuff_t *tvb, guint offset, guint len)
 {
-  const guint8* buf;
+	const guint8* buf;
 
-  tvb_ensure_bytes_exist(tvb, offset, len);  /* len == -1 not allowed */
-  buf = tvb_get_ptr(tvb, offset, len);
+	tvb_ensure_bytes_exist(tvb, offset, len);  /* len == -1 not allowed */
+	buf = tvb_get_ptr(tvb, offset, len);
 
-  return ( crc32_ccitt(buf, len) );
+	return ( crc32_ccitt(buf, len) );
 }
 
 guint32
 crc32_ccitt_tvb_seed(tvbuff_t *tvb, guint len, guint32 seed)
 {
-  const guint8* buf;
+	const guint8* buf;
 
-  tvb_ensure_bytes_exist(tvb, 0, len);  /* len == -1 not allowed */
-  buf = tvb_get_ptr(tvb, 0, len);
+	tvb_ensure_bytes_exist(tvb, 0, len);  /* len == -1 not allowed */
+	buf = tvb_get_ptr(tvb, 0, len);
 
-  return ( crc32_ccitt_seed(buf, len, seed) );
+	return ( crc32_ccitt_seed(buf, len, seed) );
 }
 
 guint32
-crc32_ccitt_tvb_offset_seed(tvbuff_t *tvb, guint offset, guint len, guint32 seed)
+crc32_ccitt_tvb_offset_seed(tvbuff_t *tvb, guint offset, guint len,
+			    guint32 seed)
 {
-  const guint8* buf;
+	const guint8* buf;
 
-  tvb_ensure_bytes_exist(tvb, offset, len);  /* len == -1 not allowed */
-  buf = tvb_get_ptr(tvb, offset, len);
+	tvb_ensure_bytes_exist(tvb, offset, len);  /* len == -1 not allowed */
+	buf = tvb_get_ptr(tvb, offset, len);
 
-  return ( crc32_ccitt_seed(buf, len, seed) );
+	return ( crc32_ccitt_seed(buf, len, seed) );
 }
 
 /*
@@ -255,15 +257,15 @@ crc32_ccitt_tvb_offset_seed(tvbuff_t *tvb, guint offset, guint len, guint32 seed
 guint32
 crc32_802_tvb(tvbuff_t *tvb, guint len)
 {
-  guint32 c_crc;
+	guint32 c_crc;
 
-  c_crc = crc32_ccitt_tvb(tvb, len);
+	c_crc = crc32_ccitt_tvb(tvb, len);
 
-  /* Byte reverse. */
-  c_crc = ((unsigned char)(c_crc>>0)<<24) |
-    ((unsigned char)(c_crc>>8)<<16) |
-    ((unsigned char)(c_crc>>16)<<8) |
-    ((unsigned char)(c_crc>>24)<<0);
+	/* Byte reverse. */
+	c_crc = ((unsigned char)(c_crc>>0)<<24) |
+		((unsigned char)(c_crc>>8)<<16) |
+		((unsigned char)(c_crc>>16)<<8) |
+		((unsigned char)(c_crc>>24)<<0);
 
-  return ( c_crc );
+	return ( c_crc );
 }
diff --git a/epan/libwireshark.def b/epan/libwireshark.def
index aa97c2e942..67a46e0bc9 100644
--- a/epan/libwireshark.def
+++ b/epan/libwireshark.def
@@ -108,6 +108,14 @@ copy_file_binary_mode
 copy_prefs
 crc16_ccitt_tvb
 crc16_plain_tvb_offset
+calculate_crc32c
+crc32_ccitt
+crc32_ccitt_seed
+crc32_ccitt_tvb
+crc32_ccitt_tvb_offset
+crc32_ccitt_tvb_seed
+crc32_ccitt_tvb_offset_seed
+crc32_802_tvb
 create_dissector_handle
 create_persconffile_dir
 create_persconffile_profile