Add strfilter__string to recover rules string from strfilter.
This will be good for debugging.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu...@hitachi.com>
---
tools/perf/util/strfilter.c | 67 +++++++++++++++++++++++++++++++++++++++++++
tools/perf/util/strfilter.h | 9 ++++++
2 files changed, 76 insertions(+)
diff --git a/tools/perf/util/strfilter.c b/tools/perf/util/strfilter.c
index f3429cd..bcae659 100644
--- a/tools/perf/util/strfilter.c
+++ b/tools/perf/util/strfilter.c
@@ -237,3 +237,70 @@ bool strfilter__compare(struct strfilter *filter, const
char *str)
return false;
return strfilter_node__compare(filter->root, str);
}
+
+static int strfilter_node__sprint(struct strfilter_node *node, char *buf);
+
+/* sprint node in parenthesis if needed */
+static int strfilter_node__sprint_pt(struct strfilter_node *node, char *buf)
+{
+ int len;
+ int pt = node->r ? 2 : 0; /* don't need to check node->l */
+
+ if (buf && pt)
+ *buf++ = '(';
+ len = strfilter_node__sprint(node, buf);
+ if (len < 0)
+ return len;
+ if (buf && pt)
+ *(buf + len) = ')';
+ return len + pt;
+}
+
+static int strfilter_node__sprint(struct strfilter_node *node, char *buf)
+{
+ int len = 0, rlen;
+
+ if (!node || !node->p)
+ return -EINVAL;
+
+ switch (*node->p) {
+ case '|':
+ case '&':
+ len = strfilter_node__sprint_pt(node->l, buf);
+ if (len < 0)
+ return len;
+ case '!':
+ if (buf) {
+ *(buf + len++) = *node->p;
+ buf += len;
+ } else
+ len++;
+ rlen = strfilter_node__sprint_pt(node->r, buf);
+ if (rlen < 0)
+ return rlen;
+ len += rlen;
+ break;
+ default:
+ len = strlen(node->p);
+ if (buf)
+ strcpy(buf, node->p);
+ }
+
+ return len;
+}
+
+char *strfilter__string(struct strfilter *filter)
+{
+ int len;
+ char *ret = NULL;
+
+ len = strfilter_node__sprint(filter->root, NULL);
+ if (len < 0)
+ return NULL;
+
+ ret = malloc(len + 1);
+ if (ret)
+ strfilter_node__sprint(filter->root, ret);
+
+ return ret;
+}
diff --git a/tools/perf/util/strfilter.h b/tools/perf/util/strfilter.h
index d007cdc..cff5eda 100644
--- a/tools/perf/util/strfilter.h
+++ b/tools/perf/util/strfilter.h
@@ -71,4 +71,13 @@ bool strfilter__compare(struct strfilter *filter, const char
*str);
*/
void strfilter__delete(struct strfilter *filter);
+/**
+ * strfilter__string - Reconstruct a rule string from filter
+ * @filter: String filter to reconstruct
+ *
+ * Reconstruct a rule string from @filter. This will be good for
+ * debug messages. Note that returning string must be freed afterward.
+ */
+char *strfilter__string(struct strfilter *filter);
+
#endif
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