X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/d866803818fb47a851e5730ccff634f993ce6f68..af0b220756571bc8faf57a0c7b7389dd86a60376:/src/bitops.c

diff --git a/src/bitops.c b/src/bitops.c
index d309b7af..3ef0a8f3 100644
--- a/src/bitops.c
+++ b/src/bitops.c
@@ -1,3 +1,33 @@
+/* Bit operations.
+ *
+ * Copyright (c) 2009-2012, Salvatore Sanfilippo <antirez at gmail dot com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
 #include "redis.h"
 
 /* -----------------------------------------------------------------------------
@@ -114,14 +144,14 @@ void setbitCommand(redisClient *c) {
     o->ptr = sdsgrowzero(o->ptr,byte+1);
 
     /* Get current values */
-    byteval = ((char*)o->ptr)[byte];
+    byteval = ((uint8_t*)o->ptr)[byte];
     bit = 7 - (bitoffset & 0x7);
     bitval = byteval & (1 << bit);
 
     /* Update byte with new bit value and return original value */
     byteval &= ~(1 << bit);
     byteval |= ((on & 0x1) << bit);
-    ((char*)o->ptr)[byte] = byteval;
+    ((uint8_t*)o->ptr)[byte] = byteval;
     signalModifiedKey(c->db,c->argv[1]);
     server.dirty++;
     addReply(c, bitval ? shared.cone : shared.czero);
@@ -148,7 +178,7 @@ void getbitCommand(redisClient *c) {
             bitval = llbuf[byte] & (1 << bit);
     } else {
         if (byte < sdslen(o->ptr))
-            bitval = ((char*)o->ptr)[byte] & (1 << bit);
+            bitval = ((uint8_t*)o->ptr)[byte] & (1 << bit);
     }
 
     addReply(c, bitval ? shared.cone : shared.czero);
@@ -197,6 +227,7 @@ void bitopCommand(redisClient *c) {
             objects[j] = NULL;
             src[j] = NULL;
             len[j] = 0;
+            minlen = 0;
             continue;
         }
         /* Return an error if one of the keys is not a string. */
@@ -326,10 +357,9 @@ void bitopCommand(redisClient *c) {
 /* BITCOUNT key [start end] */
 void bitcountCommand(redisClient *c) {
     robj *o;
-    long start, end;
+    long start, end, strlen;
     unsigned char *p;
     char llbuf[32];
-    size_t strlen;
 
     /* Lookup, check for type, and return 0 for non existing keys. */
     if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.czero)) == NULL ||
@@ -356,7 +386,7 @@ void bitcountCommand(redisClient *c) {
         if (end < 0) end = strlen+end;
         if (start < 0) start = 0;
         if (end < 0) end = 0;
-        if ((unsigned)end >= strlen) end = strlen-1;
+        if (end >= strlen) end = strlen-1;
     } else if (c->argc == 2) {
         /* The whole string. */
         start = 0;