61d5ffaf10
issues in these areas:
.h's installed
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files needed in ~/legal for copyleft reasons.
762 lines
20 KiB
C++
762 lines
20 KiB
C++
// This may look like C code, but it is really -*- C++ -*-
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/*
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Copyright (C) 1988 Free Software Foundation
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written by Doug Lea (dl@rocky.oswego.edu)
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This file is part of the GNU C++ Library. This library is free
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software; you can redistribute it and/or modify it under the terms of
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the GNU Library General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your
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option) any later version. This library is distributed in the hope
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that it will be useful, but WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _BitString_h
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#ifdef __GNUG__
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#pragma interface
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#endif
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#define _BitString_h 1
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#include <stream.h>
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#include <limits.h>
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#include <bitprims.h>
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#define BITSTRBITS _BS_BITS_PER_WORD
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struct BitStrRep
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{
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unsigned int len; // length in bits
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unsigned short sz; // allocated slots
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_BS_word s[1]; // bits start here
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};
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extern BitStrRep* BStr_alloc(BitStrRep*, const _BS_word*, int, int,int);
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extern BitStrRep* BStr_resize(BitStrRep*, int);
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extern BitStrRep* BStr_copy(BitStrRep*, const BitStrRep*);
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extern BitStrRep* cmpl(const BitStrRep*, BitStrRep*);
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extern BitStrRep* and(const BitStrRep*, const BitStrRep*, BitStrRep*);
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extern BitStrRep* or(const BitStrRep*, const BitStrRep*, BitStrRep*);
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extern BitStrRep* xor(const BitStrRep*, const BitStrRep*, BitStrRep*);
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extern BitStrRep* diff(const BitStrRep*, const BitStrRep*, BitStrRep*);
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extern BitStrRep* cat(const BitStrRep*, const BitStrRep*, BitStrRep*);
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extern BitStrRep* cat(const BitStrRep*, unsigned int, BitStrRep*);
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extern BitStrRep* lshift(const BitStrRep*, int, BitStrRep*);
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class BitString;
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class BitPattern;
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class BitStrBit
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{
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protected:
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BitString& src;
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unsigned int pos;
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public:
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BitStrBit(BitString& v, int p);
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BitStrBit(const BitStrBit& b);
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~BitStrBit();
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operator unsigned int() const;
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int operator = (unsigned int b);
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};
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class BitSubString
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{
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friend class BitString;
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friend class BitPattern;
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protected:
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BitString& S;
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unsigned int pos;
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unsigned int len;
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BitSubString(BitString& x, int p, int l);
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BitSubString(const BitSubString& x);
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public:
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~BitSubString();
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BitSubString& operator = (const BitString&);
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BitSubString& operator = (const BitSubString&);
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int length() const;
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int empty() const;
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int OK() const;
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};
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class BitString
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{
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friend class BitSubString;
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friend class BitPattern;
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protected:
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BitStrRep* rep;
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int search(int, int, const _BS_word*, int, int) const;
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int match(int, int, int, const _BS_word*,int,int) const;
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BitSubString _substr(int first, int l);
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public:
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// constructors
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BitString();
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BitString(const BitString&);
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BitString(const BitSubString& y);
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~BitString();
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BitString& operator = (unsigned int bit);
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BitString& operator = (const BitString& y);
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BitString& operator = (const BitSubString& y);
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// equality & subset tests
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friend int operator == (const BitString&, const BitString&);
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friend int operator != (const BitString&, const BitString&);
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friend int operator < (const BitString&, const BitString&);
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friend int operator <= (const BitString&, const BitString&);
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friend int operator > (const BitString&, const BitString&);
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friend int operator >= (const BitString&, const BitString&);
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// procedural versions of operators
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friend void and(const BitString&, const BitString&, BitString&);
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friend void or(const BitString&, const BitString&, BitString&);
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friend void xor(const BitString&, const BitString&, BitString&);
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friend void diff(const BitString&, const BitString&, BitString&);
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friend void cat(const BitString&, const BitString&, BitString&);
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friend void cat(const BitString&, unsigned int, BitString&);
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friend void lshift(const BitString&, int, BitString&);
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friend void rshift(const BitString&, int, BitString&);
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friend void complement(const BitString&, BitString&);
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friend int lcompare(const BitString&, const BitString&);
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// assignment-based operators
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// (constuctive versions decalred inline below
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BitString& operator |= (const BitString&);
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BitString& operator &= (const BitString&);
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BitString& operator -= (const BitString&);
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BitString& operator ^= (const BitString&);
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BitString& operator += (const BitString&);
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BitString& operator += (unsigned int b);
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BitString& operator <<=(int s);
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BitString& operator >>=(int s);
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void complement();
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// individual bit manipulation
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void set(int pos);
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void set(int from, int to);
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void set();
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void clear(int pos);
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void clear(int from, int to);
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void clear();
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void invert(int pos);
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void invert(int from, int to);
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int test(int pos) const;
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int test(int from, int to) const;
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void assign(int p, unsigned int bit);
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// indexing
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BitStrBit operator [] (int pos);
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// iterators
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int first(unsigned int bit = 1) const;
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int last(unsigned int b = 1) const;
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int next(int pos, unsigned int b = 1) const;
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int prev(int pos, unsigned int b = 1) const;
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int previous(int pos, unsigned int b = 1) const
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{ return prev(pos, b); } /* Obsolete synonym */
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// searching & matching
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int index(unsigned int bit, int startpos = 0) const ;
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int index(const BitString&, int startpos = 0) const;
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int index(const BitSubString&, int startpos = 0) const;
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int index(const BitPattern&, int startpos = 0) const;
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int contains(const BitString&) const;
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int contains(const BitSubString&) const;
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int contains(const BitPattern&) const;
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int contains(const BitString&, int pos) const;
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int contains(const BitSubString&, int pos) const;
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int contains(const BitPattern&, int pos) const;
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int matches(const BitString&, int pos = 0) const;
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int matches(const BitSubString&, int pos = 0) const;
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int matches(const BitPattern&, int pos = 0) const;
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// BitSubString extraction
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BitSubString at(int pos, int len);
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BitSubString at(const BitString&, int startpos = 0);
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BitSubString at(const BitSubString&, int startpos = 0);
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BitSubString at(const BitPattern&, int startpos = 0);
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BitSubString before(int pos);
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BitSubString before(const BitString&, int startpos = 0);
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BitSubString before(const BitSubString&, int startpos = 0);
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BitSubString before(const BitPattern&, int startpos = 0);
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BitSubString after(int pos);
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BitSubString after(const BitString&, int startpos = 0);
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BitSubString after(const BitSubString&, int startpos = 0);
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BitSubString after(const BitPattern&, int startpos = 0);
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// other friends & utilities
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friend BitString common_prefix(const BitString&, const BitString&,
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int pos = 0);
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friend BitString common_suffix(const BitString&, const BitString&,
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int pos = -1);
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friend BitString reverse(const BitString&);
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void right_trim(unsigned int bit);
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void left_trim(unsigned int bit);
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// status
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int empty() const ;
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int count(unsigned int bit = 1) const;
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int length() const;
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// convertors & IO
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friend BitString atoBitString(const char* s, char f='0', char t='1');
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// BitStringtoa is deprecated; do not use in new programs!
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friend const char* BitStringtoa(const BitString&, char f='0', char t='1');
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void printon(ostream&, char f='0', char t='1') const;
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friend BitString shorttoBitString(unsigned short);
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friend BitString longtoBitString(unsigned long);
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friend ostream& operator << (ostream& s, const BitString&);
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// misc
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void error(const char* msg) const;
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// indirect friends
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friend BitPattern atoBitPattern(const char* s,
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char f='0',char t='1',char x='X');
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friend const char* BitPatterntoa(const BitPattern& p,
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char f='0',char t='1',char x='X');
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int OK() const;
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};
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class BitPattern
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{
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public:
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BitString pattern;
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BitString mask;
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BitPattern();
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BitPattern(const BitPattern&);
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BitPattern(const BitString& p, const BitString& m);
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~BitPattern();
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friend const char* BitPatterntoa(const BitPattern& p,
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char f/*='0'*/,char t/*='1'*/,char x/*='X'*/);
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void printon(ostream&, char f='0',char t='1',char x='X') const;
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friend BitPattern atoBitPattern(const char* s, char f,char t, char x);
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friend ostream& operator << (ostream& s, const BitPattern&);
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int search(const _BS_word*, int, int) const;
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int match(const _BS_word* xs, int, int, int) const;
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int OK() const;
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};
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BitString operator & (const BitString& x, const BitString& y);
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BitString operator | (const BitString& x, const BitString& y);
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BitString operator ^ (const BitString& x, const BitString& y);
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BitString operator << (const BitString& x, int y);
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BitString operator >> (const BitString& x, int y);
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BitString operator - (const BitString& x, const BitString& y);
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BitString operator + (const BitString& x, const BitString& y);
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BitString operator + (const BitString& x, unsigned int y);
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BitString operator ~ (const BitString& x);
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int operator != (const BitString& x, const BitString& y);
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int operator>(const BitString& x, const BitString& y);
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int operator>=(const BitString& x, const BitString& y);
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extern BitStrRep _nilBitStrRep;
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extern BitString _nil_BitString;
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// primitive bit extraction
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// These must be inlined regardless of optimization.
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inline int BitStr_index(int l) { return (unsigned)(l) / BITSTRBITS; }
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inline int BitStr_pos(int l) { return l & (BITSTRBITS - 1); }
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// constructors & assignment
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inline BitString::BitString() :rep(&_nilBitStrRep) {}
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inline BitString::BitString(const BitString& x) :rep(BStr_copy(0, x.rep)) {}
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inline BitString::BitString(const BitSubString& y)
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:rep (BStr_alloc(0, y.S.rep->s, y.pos, y.pos+y.len, y.len)) {}
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inline BitString::~BitString()
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{
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if (rep != &_nilBitStrRep) delete rep;
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}
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inline BitString shorttoBitString(unsigned short w)
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{
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BitString r;
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_BS_word ww = w;
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#if _BS_BIGENDIAN
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abort();
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#endif
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r.rep = BStr_alloc(0, &ww, 0, 8 * sizeof(short), 8 * sizeof(short));
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return r;
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}
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inline BitString longtoBitString(unsigned long w)
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{
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BitString r;
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#if 1
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_BS_word u = w;
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r.rep = BStr_alloc(0, &u, 0, BITSTRBITS, BITSTRBITS);
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#else
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unsigned short u[2];
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u[0] = w & ((unsigned short)(~(0)));
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u[1] = w >> BITSTRBITS;
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r.rep = BStr_alloc(0, &u[0], 0, 2*BITSTRBITS, 2*BITSTRBITS);
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#endif
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return r;
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}
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inline BitString& BitString::operator = (const BitString& y)
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{
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rep = BStr_copy(rep, y.rep);
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return *this;
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}
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inline BitString& BitString::operator = (unsigned int b)
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{
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_BS_word bit = b;
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rep = BStr_alloc(rep, &bit, 0, 1, 1);
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return *this;
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}
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inline BitString& BitString::operator=(const BitSubString& y)
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{
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rep = BStr_alloc(rep, y.S.rep->s, y.pos, y.pos+y.len, y.len);
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return *this;
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}
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inline BitSubString::BitSubString(const BitSubString& x)
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:S(x.S), pos(x.pos), len(x.len) {}
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inline BitSubString::BitSubString(BitString& x, int p, int l)
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: S(x), pos(p), len(l) {}
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inline BitSubString::~BitSubString() {}
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inline BitPattern::BitPattern(const BitString& p, const BitString& m)
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:pattern(p), mask(m) {}
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inline BitPattern::BitPattern(const BitPattern& b)
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:pattern(b.pattern), mask(b.mask) {}
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inline BitPattern::BitPattern() {}
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inline BitPattern::~BitPattern() {}
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// procedural versions of operators
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inline void and(const BitString& x, const BitString& y, BitString& r)
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{
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r.rep = and(x.rep, y.rep, r.rep);
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}
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inline void or(const BitString& x, const BitString& y, BitString& r)
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{
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r.rep = or(x.rep, y.rep, r.rep);
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}
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inline void xor(const BitString& x, const BitString& y, BitString& r)
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{
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r.rep = xor(x.rep, y.rep, r.rep);
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}
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inline void diff(const BitString& x, const BitString& y, BitString& r)
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{
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r.rep = diff(x.rep, y.rep, r.rep);
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}
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inline void cat(const BitString& x, const BitString& y, BitString& r)
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{
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r.rep = cat(x.rep, y.rep, r.rep);
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}
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inline void cat(const BitString& x, unsigned int y, BitString& r)
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{
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r.rep = cat(x.rep, y, r.rep);
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}
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inline void rshift(const BitString& x, int y, BitString& r)
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{
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r.rep = lshift(x.rep, -y, r.rep);
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}
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inline void lshift(const BitString& x, int y, BitString& r)
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{
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r.rep = lshift(x.rep, y, r.rep);
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}
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inline void complement(const BitString& x, BitString& r)
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{
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r.rep = cmpl(x.rep, r.rep);
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}
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// operators
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inline BitString& BitString::operator &= (const BitString& y)
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{
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and(*this, y, *this);
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return *this;
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}
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inline BitString& BitString::operator |= (const BitString& y)
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{
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or(*this, y, *this);
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return *this;
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}
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inline BitString& BitString::operator ^= (const BitString& y)
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{
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xor(*this, y, *this);
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return *this;
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}
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inline BitString& BitString::operator <<= (int y)
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{
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lshift(*this, y, *this);
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return *this;
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}
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inline BitString& BitString::operator >>= (int y)
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{
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rshift(*this, y, *this);
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return *this;
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}
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inline BitString& BitString::operator -= (const BitString& y)
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{
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diff(*this, y, *this);
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return *this;
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}
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inline BitString& BitString::operator += (const BitString& y)
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{
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cat(*this, y, *this);
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return *this;
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}
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inline BitString& BitString::operator += (unsigned int y)
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{
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cat(*this, y, *this);
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return *this;
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}
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inline void BitString::complement()
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{
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::complement(*this, *this);
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}
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#if defined(__GNUG__) && !defined(_G_NO_NRV)
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inline BitString operator & (const BitString& x, const BitString& y) return r
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{
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and(x, y, r);
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}
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inline BitString operator | (const BitString& x, const BitString& y) return r
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{
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or(x, y, r);
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}
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inline BitString operator ^ (const BitString& x, const BitString& y) return r
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{
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xor(x, y, r);
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}
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inline BitString operator << (const BitString& x, int y) return r
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{
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lshift(x, y, r);
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}
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inline BitString operator >> (const BitString& x, int y) return r
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{
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rshift(x, y, r);
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}
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inline BitString operator - (const BitString& x, const BitString& y) return r
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{
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diff(x, y, r);
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}
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inline BitString operator + (const BitString& x, const BitString& y) return r
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{
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cat(x, y, r);
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}
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inline BitString operator + (const BitString& x, unsigned int y) return r
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{
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cat(x, y, r);
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}
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inline BitString operator ~ (const BitString& x) return r
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{
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complement(x, r);
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}
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#else /* NO_NRV */
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inline BitString operator & (const BitString& x, const BitString& y)
|
|
{
|
|
BitString r; and(x, y, r); return r;
|
|
}
|
|
|
|
inline BitString operator | (const BitString& x, const BitString& y)
|
|
{
|
|
BitString r; or(x, y, r); return r;
|
|
}
|
|
|
|
inline BitString operator ^ (const BitString& x, const BitString& y)
|
|
{
|
|
BitString r; xor(x, y, r); return r;
|
|
}
|
|
|
|
inline BitString operator << (const BitString& x, int y)
|
|
{
|
|
BitString r; lshift(x, y, r); return r;
|
|
}
|
|
|
|
inline BitString operator >> (const BitString& x, int y)
|
|
{
|
|
BitString r; rshift(x, y, r); return r;
|
|
}
|
|
|
|
inline BitString operator - (const BitString& x, const BitString& y)
|
|
{
|
|
BitString r; diff(x, y, r); return r;
|
|
}
|
|
|
|
inline BitString operator + (const BitString& x, const BitString& y)
|
|
{
|
|
BitString r; cat(x, y, r); return r;
|
|
}
|
|
|
|
inline BitString operator + (const BitString& x, unsigned int y)
|
|
{
|
|
BitString r; cat(x, y, r); return r;
|
|
}
|
|
|
|
inline BitString operator ~ (const BitString& x)
|
|
{
|
|
BitString r; complement(x, r); return r;
|
|
}
|
|
|
|
#endif
|
|
|
|
// status, matching
|
|
|
|
inline int BitString::length() const
|
|
{
|
|
return rep->len;
|
|
}
|
|
|
|
inline int BitString::empty() const
|
|
{
|
|
return rep->len == 0;
|
|
}
|
|
|
|
inline int BitString::index(const BitString& y, int startpos) const
|
|
{
|
|
return search(startpos, rep->len, y.rep->s, 0, y.rep->len);
|
|
}
|
|
|
|
inline int BitString::index(const BitSubString& y, int startpos) const
|
|
{
|
|
return search(startpos, rep->len, y.S.rep->s, y.pos, y.pos+y.len);
|
|
}
|
|
|
|
inline int BitString::contains(const BitString& y) const
|
|
{
|
|
return search(0, rep->len, y.rep->s, 0, y.rep->len) >= 0;
|
|
}
|
|
|
|
inline int BitString::contains(const BitSubString& y) const
|
|
{
|
|
return search(0, rep->len, y.S.rep->s, y.pos, y.pos+y.len) >= 0;
|
|
}
|
|
|
|
inline int BitString::contains(const BitString& y, int p) const
|
|
{
|
|
return match(p, rep->len, 0, y.rep->s, 0, y.rep->len);
|
|
}
|
|
|
|
inline int BitString::matches(const BitString& y, int p) const
|
|
{
|
|
return match(p, rep->len, 1, y.rep->s, 0, y.rep->len);
|
|
}
|
|
|
|
inline int BitString::contains(const BitSubString& y, int p) const
|
|
{
|
|
return match(p, rep->len, 0, y.S.rep->s, y.pos, y.pos+y.len);
|
|
}
|
|
|
|
inline int BitString::matches(const BitSubString& y, int p) const
|
|
{
|
|
return match(p, rep->len, 1, y.S.rep->s, y.pos, y.pos+y.len);
|
|
}
|
|
|
|
inline int BitString::contains(const BitPattern& r) const
|
|
{
|
|
return r.search(rep->s, 0, rep->len) >= 0;
|
|
}
|
|
|
|
inline int BitString::contains(const BitPattern& r, int p) const
|
|
{
|
|
return r.match(rep->s, p, rep->len, 0);
|
|
}
|
|
|
|
inline int BitString::matches(const BitPattern& r, int p) const
|
|
{
|
|
return r.match(rep->s, p, rep->len, 1);
|
|
}
|
|
|
|
inline int BitString::index(const BitPattern& r, int startpos) const
|
|
{
|
|
return r.search(rep->s, startpos, rep->len);
|
|
}
|
|
|
|
inline int BitSubString::length() const
|
|
{
|
|
return len;
|
|
}
|
|
|
|
inline int BitSubString::empty() const
|
|
{
|
|
return len == 0;
|
|
}
|
|
|
|
inline int operator != (const BitString& x, const BitString& y)
|
|
{
|
|
return !(x == y);
|
|
}
|
|
|
|
inline int operator>(const BitString& x, const BitString& y)
|
|
{
|
|
return y < x;
|
|
}
|
|
|
|
inline int operator>=(const BitString& x, const BitString& y)
|
|
{
|
|
return y <= x;
|
|
}
|
|
|
|
inline int BitString::first(unsigned int b) const
|
|
{
|
|
return next(-1, b);
|
|
}
|
|
|
|
inline int BitString::last(unsigned int b) const
|
|
{
|
|
return prev(rep->len, b);
|
|
}
|
|
|
|
inline int BitString::index(unsigned int bit, int startpos) const
|
|
{
|
|
if (startpos >= 0)
|
|
return next(startpos - 1, bit);
|
|
else
|
|
return prev(rep->len + startpos + 1, bit);
|
|
}
|
|
|
|
inline void BitString::right_trim(unsigned int b)
|
|
{
|
|
int nb = (b == 0)? 1 : 0;
|
|
rep = BStr_resize(rep, prev(rep->len, nb) + 1);
|
|
}
|
|
|
|
inline void BitString::left_trim(unsigned int b)
|
|
{
|
|
int nb = (b == 0)? 1 : 0;
|
|
int p = next(-1, nb);
|
|
rep = BStr_alloc(rep, rep->s, p, rep->len, rep->len - p);
|
|
}
|
|
|
|
inline int BitString::test(int i) const
|
|
{
|
|
return ((unsigned)(i) >= rep->len)? 0 :
|
|
((rep->s[BitStr_index(i)] & (1 << (BitStr_pos(i)))) != 0);
|
|
}
|
|
|
|
|
|
// subscripting
|
|
|
|
inline BitStrBit::BitStrBit(const BitStrBit& b) :src(b.src), pos(b.pos) {}
|
|
|
|
inline BitStrBit::BitStrBit(BitString& v, int p) :src(v), pos(p) {}
|
|
|
|
inline BitStrBit::~BitStrBit() {}
|
|
|
|
inline BitStrBit::operator unsigned int() const
|
|
{
|
|
return src.test(pos);
|
|
}
|
|
|
|
inline int BitStrBit::operator = (unsigned int b)
|
|
{
|
|
src.assign(pos, b); return b;
|
|
}
|
|
|
|
inline BitStrBit BitString::operator [] (int i)
|
|
{
|
|
if ((unsigned)(i) >= rep->len) error("illegal bit index");
|
|
return BitStrBit(*this, i);
|
|
}
|
|
|
|
inline BitSubString BitString::_substr(int first, int l)
|
|
{
|
|
if (first < 0 || l <= 0 || (unsigned)(first + l) > rep->len)
|
|
return BitSubString(_nil_BitString, 0, 0) ;
|
|
else
|
|
return BitSubString(*this, first, l);
|
|
}
|
|
|
|
#endif
|