perf tools: Improve strfilter to append additional rules

Add strfilter__or/and to append additional rules to existing strfilter.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20150424094744.23967.97614.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/strfilter.c b/tools/perf/util/strfilter.c
index 79a757a..f3429cd 100644 (file)
--- a/tools/perf/util/strfilter.c
+++ b/tools/perf/util/strfilter.c
@@ -170,6 +170,46 @@ struct strfilter *strfilter__new(const char *rules, const char **err)
        return filter;
 }
 
+static int strfilter__append(struct strfilter *filter, bool _or,
+                            const char *rules, const char **err)
+{
+       struct strfilter_node *right, *root;
+       const char *ep = NULL;
+
+       if (!filter || !rules)
+               return -EINVAL;
+
+       right = strfilter_node__new(rules, &ep);
+       if (!right || *ep != '\0') {
+               if (err)
+                       *err = ep;
+               goto error;
+       }
+       root = strfilter_node__alloc(_or ? OP_or : OP_and, filter->root, right);
+       if (!root) {
+               ep = NULL;
+               goto error;
+       }
+
+       filter->root = root;
+       return 0;
+
+error:
+       strfilter_node__delete(right);
+       return ep ? -EINVAL : -ENOMEM;
+}
+
+int strfilter__or(struct strfilter *filter, const char *rules, const char **err)
+{
+       return strfilter__append(filter, true, rules, err);
+}
+
+int strfilter__and(struct strfilter *filter, const char *rules,
+                  const char **err)
+{
+       return strfilter__append(filter, false, rules, err);
+}
+
 static bool strfilter_node__compare(struct strfilter_node *node,
                                    const char *str)
 {

diff --git a/tools/perf/util/strfilter.h b/tools/perf/util/strfilter.h
index fe611f3..d007cdc 100644 (file)
--- a/tools/perf/util/strfilter.h
+++ b/tools/perf/util/strfilter.h
@@ -29,6 +29,32 @@ struct strfilter {
 struct strfilter *strfilter__new(const char *rules, const char **err);
 
 /**
+ * strfilter__or - Append an additional rule by logical-or
+ * @filter: Original string filter
+ * @rules: Filter rule to be appended at left of the root of
+ *         @filter by using logical-or.
+ * @err: Pointer which points an error detected on @rules
+ *
+ * Parse @rules and join it to the @filter by using logical-or.
+ * Return 0 if success, or return the error code.
+ */
+int strfilter__or(struct strfilter *filter,
+                 const char *rules, const char **err);
+
+/**
+ * strfilter__add - Append an additional rule by logical-and
+ * @filter: Original string filter
+ * @rules: Filter rule to be appended at left of the root of
+ *         @filter by using logical-and.
+ * @err: Pointer which points an error detected on @rules
+ *
+ * Parse @rules and join it to the @filter by using logical-and.
+ * Return 0 if success, or return the error code.
+ */
+int strfilter__and(struct strfilter *filter,
+                  const char *rules, const char **err);
+
+/**
  * strfilter__compare - compare given string and a string filter
  * @filter: String filter
  * @str: target string