moved tcp checksum calculation to header

Signed-off-by: Michael Krelin <hacker@klever.net>

2 files changed, 16 insertions, 13 deletions

diff --git a/src/eyetil.cc b/src/eyetil.cc
index 11e2fb7..cd22eea 100644
--- a/src/eyetil.cc
+++ b/src/eyetil.cc
@@ -82,8 +82,13 @@ binary_t md5_digester::final() {
 	throw std::runtime_error("failed to MD5_Final()");
     return rv;
 }
 
+uint16_t block512_t::tcpcksum(block512_t& data) {
+    uint32_t sum = std::accumulate(data.data,data.data+words,0);
+    while(uint32_t hw = sum>>16) sum = (sum&0xffff)+hw;
+    return 0xffff&~sum;
+}
 
 static void make_path_for_template(const std::string& p,mode_t m) {
     struct stat st;
     std::string pp;
@@ -149,21 +154,8 @@ bool tarchive_t::read_data_into_fd(int fd) {
     assert(a);
     return archive_read_data_into_fd(a,fd)==ARCHIVE_OK;
 }
 
-#pragma pack(1)
-struct block512_t {
-    enum { words = 512 / sizeof(uint16_t) };
-    uint16_t data[words];
-
-    static uint16_t tcpcksum(block512_t& data) {
-	uint32_t sum = std::accumulate(data.data,data.data+words,0);
-	while(uint32_t hw = sum>>16) sum = (sum&0xffff)+hw;
-	return 0xffff&~sum;
-    }
-
-};
-#pragma pack()
 
 binary_t integrity_digest(const void *ptr,size_t size,const std::string& ukey) {
     md5_digester rv;
     std::transform( (block512_t*)ptr, ((block512_t*)ptr)+size/sizeof(block512_t),
diff --git a/src/eyetil.h b/src/eyetil.h
index 03b9ba8..7517ba6 100644
--- a/src/eyetil.h
+++ b/src/eyetil.h
@@ -62,8 +62,19 @@ struct md5_digester {
 template<> inline void md5_digester::update<binary_t>(const binary_t& x) {
     update((const unsigned char*)&(x.front()),x.size());
 }
 
+#pragma pack(1)
+struct block512_t {
+    enum { words = 512 / sizeof(uint16_t) };
+    uint16_t data[words];
+
+    inline uint8_t *dptr(size_t o) { return ((uint8_t*)this)+o; }
+
+    static uint16_t tcpcksum(block512_t& data);
+};
+#pragma pack()
+
 class tmpdir_t {
     public:
 	std::string dir;