Add support for nan in RESP3 double (#1133)

1 files changed, 4 insertions, 2 deletions

diff --git a/read.c b/read.c
index 228d4d0..8e6d21b 100644
--- a/read.c
+++ b/read.c
@@ -303,11 +303,13 @@ static int processLineItem(redisReader *r) {
                 d = INFINITY; /* Positive infinite. */
             } else if (len == 4 && strcasecmp(buf,"-inf") == 0) {
                 d = -INFINITY; /* Negative infinite. */
+            } else if (len == 3 && strcasecmp(buf,"nan") == 0) {
+                d = NAN; /* nan. */
             } else {
                 d = strtod((char*)buf,&eptr);
                 /* RESP3 only allows "inf", "-inf", and finite values, while
-                 * strtod() allows other variations on infinity, NaN,
-                 * etc. We explicity handle our two allowed infinite cases
+                 * strtod() allows other variations on infinity,
+                 * etc. We explicity handle our two allowed infinite cases and NaN
                  * above, so strtod() should only result in finite values. */
                 if (buf[0] == '\0' || eptr != &buf[len] || !isfinite(d)) {
                     __redisReaderSetError(r,REDIS_ERR_PROTOCOL,