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Fix GEOHASH negative shifting in a more compatible way.

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antirez 2019-12-18 12:57:32 +01:00
parent e6e58e455c
commit 5a72c5058c
1 changed files with 9 additions and 1 deletions
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10
src/geo.c
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@ -737,7 +737,15 @@ void geohashCommand(client *c) {
char buf[12]; char buf[12];
int i; int i;
for (i = 0; i < 11; i++) { for (i = 0; i < 11; i++) {
int idx = (hash.bits >> (52-((i+1)*5))) & 0x1f; int idx;
if (i == 10) {
/* We have just 52 bits, but the API used to output
* an 11 bytes geohash. For compatibility we assume
* zero. */
idx = 0;
} else {
idx = (hash.bits >> (52-((i+1)*5))) & 0x1f;
}
buf[i] = geoalphabet[idx]; buf[i] = geoalphabet[idx];
} }
buf[11] = '\0'; buf[11] = '\0';