+/*
+ * 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"
#include <math.h> /* isnan(), isinf() */
if (unit == UNIT_SECONDS) milliseconds *= 1000;
}
- if (lookupKeyWrite(c->db,key) != NULL && nx) {
+ if (nx && lookupKeyWrite(c->db,key) != NULL) {
addReply(c,shared.czero);
return;
}
server.dirty++;
}
-static int getBitOffsetFromArgument(redisClient *c, robj *o, size_t *offset) {
- long long loffset;
- char *err = "bit offset is not an integer or out of range";
-
- if (getLongLongFromObjectOrReply(c,o,&loffset,err) != REDIS_OK)
- return REDIS_ERR;
-
- /* Limit offset to 512MB in bytes */
- if ((loffset < 0) || ((unsigned long long)loffset >> 3) >= (512*1024*1024))
- {
- addReplyError(c,err);
- return REDIS_ERR;
- }
-
- *offset = (size_t)loffset;
- return REDIS_OK;
-}
-
-void setbitCommand(redisClient *c) {
- robj *o;
- char *err = "bit is not an integer or out of range";
- size_t bitoffset;
- int byte, bit;
- int byteval, bitval;
- long on;
-
- if (getBitOffsetFromArgument(c,c->argv[2],&bitoffset) != REDIS_OK)
- return;
-
- if (getLongFromObjectOrReply(c,c->argv[3],&on,err) != REDIS_OK)
- return;
-
- /* Bits can only be set or cleared... */
- if (on & ~1) {
- addReplyError(c,err);
- return;
- }
-
- o = lookupKeyWrite(c->db,c->argv[1]);
- if (o == NULL) {
- o = createObject(REDIS_STRING,sdsempty());
- dbAdd(c->db,c->argv[1],o);
- } else {
- if (checkType(c,o,REDIS_STRING)) return;
-
- /* Create a copy when the object is shared or encoded. */
- if (o->refcount != 1 || o->encoding != REDIS_ENCODING_RAW) {
- robj *decoded = getDecodedObject(o);
- o = createStringObject(decoded->ptr, sdslen(decoded->ptr));
- decrRefCount(decoded);
- dbOverwrite(c->db,c->argv[1],o);
- }
- }
-
- /* Grow sds value to the right length if necessary */
- byte = bitoffset >> 3;
- o->ptr = sdsgrowzero(o->ptr,byte+1);
-
- /* Get current values */
- byteval = ((char*)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;
- signalModifiedKey(c->db,c->argv[1]);
- server.dirty++;
- addReply(c, bitval ? shared.cone : shared.czero);
-}
-
-void getbitCommand(redisClient *c) {
- robj *o;
- char llbuf[32];
- size_t bitoffset;
- size_t byte, bit;
- size_t bitval = 0;
-
- if (getBitOffsetFromArgument(c,c->argv[2],&bitoffset) != REDIS_OK)
- return;
-
- if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.czero)) == NULL ||
- checkType(c,o,REDIS_STRING)) return;
-
- byte = bitoffset >> 3;
- bit = 7 - (bitoffset & 0x7);
- if (o->encoding != REDIS_ENCODING_RAW) {
- if (byte < (size_t)ll2string(llbuf,sizeof(llbuf),(long)o->ptr))
- bitval = llbuf[byte] & (1 << bit);
- } else {
- if (byte < sdslen(o->ptr))
- bitval = ((char*)o->ptr)[byte] & (1 << bit);
- }
-
- addReply(c, bitval ? shared.cone : shared.czero);
-}
-
void setrangeCommand(redisClient *c) {
robj *o;
long offset;
if (getLongLongFromObjectOrReply(c,o,&value,NULL) != REDIS_OK) return;
oldvalue = value;
- value += incr;
- if ((incr < 0 && value > oldvalue) || (incr > 0 && value < oldvalue)) {
+ if ((incr < 0 && oldvalue < 0 && incr < (LLONG_MIN-oldvalue)) ||
+ (incr > 0 && oldvalue > 0 && incr > (LLONG_MAX-oldvalue))) {
addReplyError(c,"increment or decrement would overflow");
return;
}
+ value += incr;
new = createStringObjectFromLongLong(value);
if (o)
dbOverwrite(c->db,c->argv[1],new);
checkType(c,o,REDIS_STRING)) return;
addReplyLongLong(c,stringObjectLen(o));
}
-
projects / redis.git / blobdiff