1 // Copyright 2015 Google Inc. All rights reserved
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 // +build ignore
16
17 #include "stringprintf.h"
18
19 #include <assert.h>
20 #include <stdarg.h>
21
StringPrintf(const char * format,...)22 string StringPrintf(const char* format, ...) {
23 string str;
24 str.resize(128);
25 for (int i = 0; i < 2; i++) {
26 va_list args;
27 va_start(args, format);
28 int ret = vsnprintf(&str[0], str.size(), format, args);
29 va_end(args);
30 assert(ret >= 0);
31 if (static_cast<size_t>(ret) < str.size()) {
32 str.resize(ret);
33 return str;
34 }
35 str.resize(ret + 1);
36 }
37 assert(false);
38 __builtin_unreachable();
39 }
40