X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/5a181d43cbf84f8d4b60bac26b62722e8886bbea..a1b1c1ea3adb864c8c2e3feb4eaed890a9b505cf:/src/rio.c

diff --git a/src/rio.c b/src/rio.c
index 5a745840..44165d71 100644
--- a/src/rio.c
+++ b/src/rio.c
@@ -18,6 +18,8 @@
 #include "rio.h"
 #include "util.h"
 
+uint64_t crc64(uint64_t crc, const unsigned char *s, uint64_t l);
+
 /* Returns 1 or 0 for success/failure. */
 static size_t rioBufferWrite(rio *r, const void *buf, size_t len) {
     r->io.buffer.ptr = sdscatlen(r->io.buffer.ptr,(char*)buf,len);
@@ -58,6 +60,8 @@ static const rio rioBufferIO = {
     rioBufferRead,
     rioBufferWrite,
     rioBufferTell,
+    NULL,           /* update_checksum */
+    0,              /* current checksum */
     { { NULL, 0 } } /* union for io-specific vars */
 };
 
@@ -65,6 +69,8 @@ static const rio rioFileIO = {
     rioFileRead,
     rioFileWrite,
     rioFileTell,
+    NULL,           /* update_checksum */
+    0,              /* current checksum */
     { { NULL, 0 } } /* union for io-specific vars */
 };
 
@@ -79,6 +85,12 @@ void rioInitWithBuffer(rio *r, sds s) {
     r->io.buffer.pos = 0;
 }
 
+/* This function can be installed both in memory and file streams when checksum
+ * computation is needed. */
+void rioGenericUpdateChecksum(rio *r, const void *buf, size_t len) {
+    r->cksum = crc64(r->cksum,buf,len);
+}
+
 /* ------------------------------ Higher level interface ---------------------------
  * The following higher level functions use lower level rio.c functions to help
  * generating the Redis protocol for the Append Only File. */