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Date: Wed, 9 Mar 2011 15:58:56 -0800
From: David Sharp <dhsharp@...gle.com>
To: linux-kernel@...r.kernel.org, rostedt@...dmis.org
Cc: mrubin@...gle.com, David Sharp <dhsharp@...gle.com>
Subject: [PATCH trace-cmd 2/3] parse-events: support additional operators: '!', '~', and '!='
Add support for the unary operators '!' and '~', and support '!=' so that
it is differentiated from '!'.
Signed-off-by: David Sharp <dhsharp@...gle.com>
---
parse-events.c | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/parse-events.c b/parse-events.c
index bfb7ff5..507621b 100644
--- a/parse-events.c
+++ b/parse-events.c
@@ -1564,6 +1564,9 @@ static int get_op_prio(char *op)
{
if (!op[1]) {
switch (op[0]) {
+ case '~':
+ case '!':
+ return 4;
case '*':
case '/':
case '%':
@@ -1642,6 +1645,7 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
goto out_free;
}
switch (token[0]) {
+ case '~':
case '!':
case '+':
case '-':
@@ -2981,6 +2985,21 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
left = eval_num_arg(data, size, event, arg->op.left);
right = eval_num_arg(data, size, event, arg->op.right);
switch (arg->op.op[0]) {
+ case '!':
+ switch (arg->op.op[1]) {
+ case 0:
+ val = !right;
+ break;
+ case '=':
+ val = left != right;
+ break;
+ default:
+ die("unknown op '%s'", arg->op.op);
+ }
+ break;
+ case '~':
+ val = ~right;
+ break;
case '|':
if (arg->op.op[1])
val = left || right;
--
1.7.3.1
--
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