810b14f5c2
Bug: 65560369 Test: unit tests written, manually tested in incident_report tool Change-Id: Ibb588fe3affc9675db4cfc2835eea31d1bbb701b
82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
/*
|
|
* Copyright (C) 2017 The Android Open Source Project
|
|
*
|
|
* 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 INCIDENT_HELPER_UTIL_H
|
|
#define INCIDENT_HELPER_UTIL_H
|
|
|
|
#include <string>
|
|
#include <vector>
|
|
#include <sstream>
|
|
|
|
typedef std::vector<std::string> header_t;
|
|
typedef std::vector<std::string> record_t;
|
|
typedef std::string (*trans_func) (const std::string&);
|
|
|
|
const char DEFAULT_NEWLINE = '\n';
|
|
const std::string DEFAULT_WHITESPACE = " \t";
|
|
|
|
/**
|
|
* When a text has a table format like this
|
|
* line 1: HeadA HeadB HeadC
|
|
* line 2: v1 v2 v3
|
|
* line 3: v11 v12 v13
|
|
*
|
|
* We want to parse the line in structure given the delimiter.
|
|
* parseHeader is used to parse the firse line of the table and returns a list of strings in lower case
|
|
* parseRecord is used to parse other lines and returns a list of strings
|
|
* empty strings are skipped
|
|
*/
|
|
header_t parseHeader(const std::string& line, const std::string& delimiters = DEFAULT_WHITESPACE);
|
|
record_t parseRecord(const std::string& line, const std::string& delimiters = DEFAULT_WHITESPACE);
|
|
|
|
/**
|
|
* When the line starts with the given key, the function returns true
|
|
* as well as the line argument is changed to the rest part of the original.
|
|
* e.g. "ZRAM: 6828K physical used for 31076K in swap (524284K total swap)" becomes
|
|
* "6828K physical used for 31076K in swap (524284K total swap)" when given key "ZRAM:",
|
|
* otherwise the line is not changed.
|
|
*/
|
|
bool hasPrefix(std::string* line, const char* key);
|
|
|
|
/**
|
|
* Reader class reads data from given fd in streaming fashion.
|
|
* The buffer size is controlled by capacity parameter.
|
|
*/
|
|
class Reader
|
|
{
|
|
public:
|
|
Reader(const int fd);
|
|
Reader(const int fd, const size_t capacity);
|
|
~Reader();
|
|
|
|
bool readLine(std::string* line, const char newline = DEFAULT_NEWLINE);
|
|
bool ok(std::string* error);
|
|
|
|
private:
|
|
int mFd; // set mFd to -1 when read EOF()
|
|
const size_t mMaxSize;
|
|
size_t mBufSize;
|
|
char* mBuf; // implements a circular buffer
|
|
|
|
int mRead;
|
|
int mFlushed;
|
|
std::string mStatus;
|
|
// end of read
|
|
inline bool EOR() { return mFd == -1 && mBufSize == 0; };
|
|
};
|
|
|
|
#endif // INCIDENT_HELPER_UTIL_H
|