Function _ReplyWithRoundedDouble

src/slow_log/slow_log.c:21–32

redis prints doubles with up to 17 digits of precision, which captures the inaccuracy of many floating-point numbers (such as 0.1) By using the %g format and a precision of 5 significant digits, we avoid many awkward representations like RETURN 0.1 emitting "0.10000000000000001", though we're still subject to many of the typical issues with floating-point error

// awkward representations like RETURN 0.1 emitting "0.10000000000000001",
// though we're still subject to many of the typical issues with floating-point error
static inline void _ReplyWithRoundedDouble
(
	RedisModuleCtx *ctx,
	double d
) {
	// get length required to print number
	int len = snprintf(NULL, 0, "%.5g", d);
	char str[len + 1];
	sprintf(str, "%.5g", d);
	// output string-formatted number
	RedisModule_ReplyWithStringBuffer(ctx, str, len);
}

static SlowLogItem *_SlowLogItem_New
(