| // Copyright 2016 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <fbl/string_buffer.h> |
| |
| #include <stdio.h> |
| #include <string.h> |
| |
| namespace fbl::internal { |
| |
| size_t StringBufferAppendPrintf(char* dest, size_t remaining, |
| const char* format, va_list ap) { |
| if (remaining == 0U) { |
| return 0U; |
| } |
| int count = vsnprintf(dest, remaining + 1U, format, ap); |
| if (count < 0) { |
| return 0U; |
| } |
| size_t length = static_cast<size_t>(count); |
| return length >= remaining ? remaining : length; |
| } |
| |
| } // namespace fbl::internal |
