1 files changed, 48 insertions, 0 deletions
diff --git a/Firestore/core/src/firebase/firestore/util/string_printf.h b/Firestore/core/src/firebase/firestore/util/string_printf.h
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+++ b/Firestore/core/src/firebase/firestore/util/string_printf.h
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+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_UTIL_STRING_PRINTF_H_
+#define FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_UTIL_STRING_PRINTF_H_
+
+#include <stdarg.h>
+
+#include <string>
+
+#include <absl/base/attributes.h>
+
+namespace firebase {
+namespace firestore {
+namespace util {
+
+/** Return a C++ string. */
+std::string StringPrintf(const char* format, ...)
+    ABSL_PRINTF_ATTRIBUTE(1, 2);
+
+/** Append result to a supplied string. */
+void StringAppendF(std::string* dst, const char* format, ...)
+    ABSL_PRINTF_ATTRIBUTE(2, 3);
+
+/**
+ * Lower-level routine that takes a va_list and appends to a specified
+ * string.  All other routines are just convenience wrappers around it.
+ */
+void StringAppendV(std::string* dst, const char* format, va_list ap);
+
+}  // namespace util
+}  // namespace firestore
+}  // namespace firebase
+
+#endif  // FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_UTIL_STRING_FORMAT_H_