linux-kernel - Re: [PATCH 4/4] trace-cmd: Support '+' opcode in print format

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Date:	Mon, 25 Jul 2011 10:02:32 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Vaibhav Nagarnaik <vnagarnaik@...gle.com>
Cc:	Michael Rubin <mrubin@...gle.com>,
	David Sharp <dhsharp@...gle.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] trace-cmd: Support '+' opcode in print format

On Fri, 2011-07-15 at 20:00 -0700, Vaibhav Nagarnaik wrote:
> The '+' opcode is not supported in the arguments for the print format.
> This patch adds support for it.

Thanks! This was on my todo list.

-- Steve

> 
> Signed-off-by: Vaibhav Nagarnaik <vnagarnaik@...gle.com>
> ---
>  parse-events.c |   12 ++++++++++++
>  1 files changed, 12 insertions(+), 0 deletions(-)
> 
> diff --git a/parse-events.c b/parse-events.c
> index 068c77f..2e39415 100644
> --- a/parse-events.c
> +++ b/parse-events.c
> @@ -2033,6 +2033,18 @@ static int arg_num_eval(struct print_arg *arg, long long *val)
>  				break;
>  			*val = left - right;
>  			break;
> +		case '+':
> +			if (arg->op.left->type == PRINT_NULL)
> +				left = 0;
> +			else
> +				ret = arg_num_eval(arg->op.left, &left);
> +			if (!ret)
> +				break;
> +			ret = arg_num_eval(arg->op.right, &right);
> +			if (!ret)
> +				break;
> +			*val = left + right;
> +			break;
>  		default:
>  			do_warning("unknown op '%s'", arg->op.op);
>  			ret = 0;


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