Adds pushLimit: and popLimit: into GPBCodedInputStream (#2297)
Adds pushLimit: and popLimit: into GPBCodedInputStream
diff --git a/objectivec/GPBCodedInputStream.h b/objectivec/GPBCodedInputStream.h
index de27b18..fbe5009 100644
--- a/objectivec/GPBCodedInputStream.h
+++ b/objectivec/GPBCodedInputStream.h
@@ -218,6 +218,27 @@
- (size_t)position;
/**
+ * Moves the limit to the given byte offset starting at the current location.
+ *
+ * @exception GPBCodedInputStreamException If the requested bytes exceeed the
+ * current limit.
+ *
+ * @param byteLimit The number of bytes to move the limit, offset to the current
+ * location.
+ *
+ * @return The limit offset before moving the new limit.
+ */
+- (size_t)pushLimit:(size_t)byteLimit;
+
+/**
+ * Moves the limit back to the offset as it was before calling pushLimit:.
+ *
+ * @param oldLimit The number of bytes to move the current limit. Usually this
+ * is the value returned by the pushLimit: method.
+ */
+- (void)popLimit:(size_t)oldLimit;
+
+/**
* Verifies that the last call to -readTag returned the given tag value. This
* is used to verify that a nested group ended with the correct end tag.
*
diff --git a/objectivec/GPBCodedInputStream.m b/objectivec/GPBCodedInputStream.m
index 2b578dd..e8c8989 100644
--- a/objectivec/GPBCodedInputStream.m
+++ b/objectivec/GPBCodedInputStream.m
@@ -400,6 +400,14 @@
return state_.bufferPos;
}
+- (size_t)pushLimit:(size_t)byteLimit {
+ return GPBCodedInputStreamPushLimit(&state_, byteLimit);
+}
+
+- (void)popLimit:(size_t)oldLimit {
+ GPBCodedInputStreamPopLimit(&state_, oldLimit);
+}
+
- (double)readDouble {
return GPBCodedInputStreamReadDouble(&state_);
}
