From fef0e5211cd1cb9a2acb5dad6045d15cfd75fe5b Mon Sep 17 00:00:00 2001
From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Wed, 2 May 2012 11:47:50 -0400
Subject: [PATCH] Fix: add missing bt_ctf_get_int_len API

Useful to track the overflow of integer values.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---
 formats/ctf/events.c            | 14 ++++++++++++++
 include/babeltrace/ctf/events.h |  6 ++++++
 include/babeltrace/types.h      |  1 +
 types/integer.c                 | 11 +++++++++++
 4 files changed, 32 insertions(+)

diff --git a/formats/ctf/events.c b/formats/ctf/events.c
index 27a5fe7b..4fa8f303 100644
--- a/formats/ctf/events.c
+++ b/formats/ctf/events.c
@@ -357,6 +357,20 @@ int bt_ctf_get_int_byte_order(const struct definition *field)
 	return ret;
 }
 
+ssize_t bt_ctf_get_int_len(const struct definition *field)
+{
+	ssize_t ret;
+
+	if (field && bt_ctf_field_type(field) == CTF_TYPE_INTEGER) {
+		ret = (ssize_t) get_int_len(field);
+	} else {
+		ret = -1;
+		bt_ctf_field_set_error(-EINVAL);
+	}
+
+	return ret;
+}
+
 enum ctf_string_encoding bt_ctf_get_encoding(const struct definition *field)
 {
 	enum ctf_string_encoding ret = 0;
diff --git a/include/babeltrace/ctf/events.h b/include/babeltrace/ctf/events.h
index 30365aaa..1cfa9e3b 100644
--- a/include/babeltrace/ctf/events.h
+++ b/include/babeltrace/ctf/events.h
@@ -155,6 +155,12 @@ int bt_ctf_get_int_base(const struct definition *field);
  */
 int bt_ctf_get_int_byte_order(const struct definition *field);
 
+/*
+ * bt_ctf_get_int_len: return the size, in bits, of an int or a negative
+ * value on error
+ */
+ssize_t bt_ctf_get_int_len(const struct definition *field);
+
 /*
  * bt_ctf_get_encoding: return the encoding of an int or a string.
  * return a negative value on error
diff --git a/include/babeltrace/types.h b/include/babeltrace/types.h
index 845a8ae9..a0ad283d 100644
--- a/include/babeltrace/types.h
+++ b/include/babeltrace/types.h
@@ -371,6 +371,7 @@ int64_t get_signed_int(const struct definition *field);
 int get_int_signedness(const struct definition *field);
 int get_int_byte_order(const struct definition *field);
 int get_int_base(const struct definition *field);
+size_t get_int_len(const struct definition *field);	/* in bits */
 enum ctf_string_encoding get_int_encoding(const struct definition *field);
 
 /*
diff --git a/types/integer.c b/types/integer.c
index 808a4893..af5cc39f 100644
--- a/types/integer.c
+++ b/types/integer.c
@@ -129,6 +129,17 @@ int get_int_base(const struct definition *field)
 	return integer_declaration->base;
 }
 
+size_t get_int_len(const struct definition *field)
+{
+	struct definition_integer *integer_definition;
+	const struct declaration_integer *integer_declaration;
+
+	integer_definition = container_of(field, struct definition_integer, p);
+	integer_declaration = integer_definition->declaration;
+
+	return integer_declaration->len;
+}
+
 int get_int_byte_order(const struct definition *field)
 {
 	struct definition_integer *integer_definition;
-- 
2.34.1