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addReplyDouble(): format infinite in a libc agnostic way.

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There are systems that when printing +/- infinte with printf-family
functions will not use the usual "inf" "-inf", but different strings.
Handle that explicitly.

Fixes issue #930.
This commit is contained in:
antirez 2013-07-17 15:04:22 +02:00
parent f590dd82ce
commit b9cc90a119
1 changed files with 10 additions and 3 deletions
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13
src/networking.c
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@ -29,6 +29,7 @@
#include "redis.h" #include "redis.h"
#include <sys/uio.h> #include <sys/uio.h>
#include <math.h>
static void setProtocolError(redisClient *c, int pos); static void setProtocolError(redisClient *c, int pos);
@ -415,9 +416,15 @@ void setDeferredMultiBulkLength(redisClient *c, void *node, long length) {
void addReplyDouble(redisClient *c, double d) { void addReplyDouble(redisClient *c, double d) {
char dbuf[128], sbuf[128]; char dbuf[128], sbuf[128];
int dlen, slen; int dlen, slen;
dlen = snprintf(dbuf,sizeof(dbuf),"%.17g",d); if (isinf(d)) {
slen = snprintf(sbuf,sizeof(sbuf),"$%d\r\n%s\r\n",dlen,dbuf); /* Libc in odd systems (Hi Solaris!) will format infinite in a
addReplyString(c,sbuf,slen); * different way, so better to handle it in an explicit way. */
addReplyBulkCString(c, d > 0 ? "inf" : "-inf");
} else {
dlen = snprintf(dbuf,sizeof(dbuf),"%.17g",d);
slen = snprintf(sbuf,sizeof(sbuf),"$%d\r\n%s\r\n",dlen,dbuf);
addReplyString(c,sbuf,slen);
}
} }
/* Add a long long as integer reply or bulk len / multi bulk count. /* Add a long long as integer reply or bulk len / multi bulk count.