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/*
This file is part of KCachegrind.
SPDX-FileCopyrightText: 2003-2016 Josef Weidendorfer <Josef.Weidendorfer@gmx.de>
SPDX-License-Identifier: GPL-2.0-only
*/
/*
* Utility classes for KCachegrind
*/
#ifndef UTILS_H
#define UTILS_H
#include <qstring.h>
class QIODevice;
typedef unsigned long long uint64;
typedef long long int64;
/**
* A simple, constant string class
*
* For use with zero-copy strings from mapped files.
*/
class FixString {
public:
// constructor for an invalid string
FixString() { _len = 0; _str = nullptr; }
/**
* FixString never does a deep copy! You have to make sure that
* the string starting at the char pointer is valid through the
* lifetime of FixString.
*/
FixString(const char*, int len);
int len() { return _len; }
const char* ascii() { return _str; }
bool isEmpty() { return _len == 0; }
bool isValid() { return _str != nullptr; }
// sets <c> to first character and returns true if length >0
bool first(char& c)
{ if (_len==0) return false; c=_str[0]; return true; }
void set(const char* s, int l) { _str=s; _len=l; }
bool stripFirst(char&);
bool stripPrefix(const char*);
/**
* Strip leading and trailing spaces
*/
void stripSurroundingSpaces();
/**
* Strip leading spaces
*/
void stripSpaces();
/**
* Strip name: [A-Za-z_][0-9A_Za-z_]*
*/
bool stripName(FixString&);
/**
* Strip string until char appears or end. Strips char, too.
*/
FixString stripUntil(char);
bool stripUInt(uint&, bool stripSpaces = true);
bool stripUInt64(uint64&, bool stripSpaces = true);
bool stripInt64(int64&, bool stripSpaces = true);
operator QString() const
{ return QString::fromLocal8Bit(_str,_len); }
private:
const char* _str;
int _len;
};
/**
* A class for fast line by line reading of a read-only ASCII file
*/
class FixFile {
public:
FixFile(QIODevice*, const QString&);
~FixFile();
/**
* Read next line into @p str.
* @param str is the target string
* @returns false on error or EOF.
*/
bool nextLine(FixString& str);
bool exists() { return !_openError; }
unsigned len() { return _len; }
unsigned current() { return _current - _base; }
bool setCurrent(unsigned pos);
void rewind() { setCurrent(0); }
private:
char *_base, *_current;
QByteArray _data;
unsigned _len, _currentLeft;
bool _used_mmap, _openError;
QIODevice* _file;
QString _filename;
};
/**
* A list of pointers, only able to append items.
* Optimized for speed, not space.
*/
template<class type>
class AppendList {
public:
AppendList();
~AppendList() { clear(); }
void setAutoDelete(bool);
void clear();
void append(const type*);
unsigned count() const { return _count; }
unsigned containsRef(const type*) const;
type* current();
type* first();
type* next();
private:
static const int firstLen = 8;
static const int maxLen = 256;
struct AppendListChunk {
int size;
struct AppendListChunk* next;
type* data[1];
};
struct AppendListChunk *_next, *_current, *_last;
int _count, _currentIndex, _lastIndex;
bool _autoDelete;
type* _first[firstLen];
};
#endif
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