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@google.com>
LKML-Reference: <1299715137-22768-2-git-send-email-dhsharp@google.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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;