1. 16 Jul, 2013 1 commit
    • antirez's avatar
      Make sure that ZADD can accept the full range of double values. · 112e7636
      antirez authored
      This fixes issue #1194, that contains many details.
      
      However in short, it was possible for ZADD to not accept as score values
      that was however possible to obtain with multiple calls to ZINCRBY, like
      in the following example:
      
      redis 127.0.0.1:6379> zadd k 2.5e-308 m
      (integer) 1
      redis 127.0.0.1:6379> zincrby k -2.4e-308 m
      "9.9999999999999694e-310"
      redis 127.0.0.1:6379> zscore k m
      "9.9999999999999694e-310"
      redis 127.0.0.1:6379> zadd k 9.9999999999999694e-310 m1
      (error) ERR value is not a valid float
      
      The problem was due to strtod() returning ERANGE in the following case
      specified by POSIX:
      
      "If the correct value would cause an underflow, a value whose magnitude
      is no greater than the smallest normalized positive number in the return
      type shall be returned and errno set to [ERANGE].".
      
      Now instead the returned value is accepted even when ERANGE is returned
      as long as the return value of the function is not negative or positive
      HUGE_VAL or zero.
      112e7636
  2. 12 Jul, 2013 1 commit
    • antirez's avatar
      Fixed compareStringObject() and introduced collateStringObject(). · d8fcbb66
      antirez authored
      compareStringObject was not always giving the same result when comparing
      two exact strings, but encoded as integers or as sds strings, since it
      switched to strcmp() when at least one of the strings were not sds
      encoded.
      
      For instance the two strings "123" and "123\x00456", where the first
      string was integer encoded, would result into the old implementation of
      compareStringObject() to return 0 as if the strings were equal, while
      instead the second string is "greater" than the first in a binary
      comparison.
      
      The same compasion, but with "123" encoded as sds string, would instead
      return a value < 0, as it is correct. It is not impossible that the
      above caused some obscure bug, since the comparison was not always
      deterministic, and compareStringObject() is used in the implementation
      of skiplists, hash tables, and so forth.
      
      At the same time, collateStringObject() was introduced by this commit, so
      that can be used by SORT command to return sorted strings usign
      collation instead of binary comparison. See next commit.
      d8fcbb66
  3. 28 Jan, 2013 2 commits
  4. 19 Jan, 2013 1 commit
    • guiquanz's avatar
      Fixed many typos. · 1caf0939
      guiquanz authored
      Conflicts fixed, mainly because 2.8 has no cluster support / files:
      	00-RELEASENOTES
      	src/cluster.c
      	src/crc16.c
      	src/redis-trib.rb
      	src/redis.h
      1caf0939
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