1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "chre/util/system/debug_dump.h"
18 #include <cstdio>
19
20 namespace chre {
21
debugDumpPrint(char * buffer,size_t * bufferPos,size_t bufferSize,const char * formatStr,...)22 bool debugDumpPrint(char *buffer, size_t *bufferPos, size_t bufferSize,
23 const char *formatStr, ...) {
24 bool success = false;
25 if (*bufferPos < bufferSize) {
26 va_list argList;
27 va_start(argList, formatStr);
28 int strLen = vsnprintf(&buffer[*bufferPos], bufferSize - *bufferPos,
29 formatStr, argList);
30 va_end(argList);
31
32 if (strLen >= 0) {
33 size_t strLenBytes = static_cast<size_t>(strLen);
34 if (bufferSize < strLenBytes ||
35 *bufferPos >= (bufferSize - strLenBytes)) {
36 *bufferPos = bufferSize;
37 buffer[bufferSize - 1] = '\0';
38 } else {
39 *bufferPos += strLenBytes;
40 success = true;
41 }
42 }
43 }
44
45 return success;
46 }
47
48 } // namespace chre
49