X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/dbb27a0a90ca3800f5be1d8170e404b9e7b9bc44..b16e423430465013c14af1550f29e7c25c3a433c:/src/t_string.c?ds=sidebyside diff --git a/src/t_string.c b/src/t_string.c index d6143ed2..1e29a613 100644 --- a/src/t_string.c +++ b/src/t_string.c @@ -82,104 +82,6 @@ void getsetCommand(redisClient *c) { 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; @@ -462,4 +364,3 @@ void strlenCommand(redisClient *c) { checkType(c,o,REDIS_STRING)) return; addReplyLongLong(c,stringObjectLen(o)); } -