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root |
1.1 |
#ifndef RXVT_UTIL_H |
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#define RXVT_UTIL_H |
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1.19 |
#include <cstdlib> |
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1.4 |
#include <cstring> |
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1.15 |
#define PP_CONCAT_(a, b) a ## b |
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#define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
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#define PP_STRINGIFY_(a) #a |
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#define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
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1.22 |
// actually, some gcc-3.x versions work, too |
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#define HAVE_GCC_BUILTINS (__GNUC__ >= 4) |
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#define HAVE_GCC_BUILTINS 0 |
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1.1 |
extern class byteorder { |
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static unsigned int e; // at least 32 bits |
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public: |
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byteorder (); |
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static bool big_endian () { return e == 0x11223344; }; |
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static bool network () { return e == 0x11223344; }; |
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static bool little_endian () { return e == 0x44332211; }; |
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static bool vax () { return e == 0x44332211; }; |
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} byteorder; |
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root |
1.16 |
// various utility functions |
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1.13 |
template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
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template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
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template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
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template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
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template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; } |
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template<typename T, typename U, typename V> static inline void clamp_it (T &v, U a, V b) { v = v < (T)a ? a : v >(T)b ? b : v; } |
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1.14 |
template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
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1.8 |
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1.21 |
// linear interpolation |
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template<typename T, typename U, typename P> |
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static inline |
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T lerp (T a, U b, P p) |
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{ |
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return (int(a) * int(p) + int(b) * int(100 - p)) / 100; |
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} |
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1.22 |
// some bit functions, xft fuck me plenty |
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#if HAVE_GCC_BUILTINS |
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static inline int ctz (unsigned int x) { return __builtin_ctz (x); } |
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static inline int popcount (unsigned int x) { return __builtin_popcount (x); } |
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#else |
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// count trailing zero bits and count # of one bits |
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int ctz (unsigned int x); |
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int popcount (unsigned int x); |
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#endif |
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root |
1.11 |
// in range including end |
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#define IN_RANGE_INC(val,beg,end) \ |
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1.9 |
((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
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1.1 |
|
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1.11 |
// in range excluding end |
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#define IN_RANGE_EXC(val,beg,end) \ |
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((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
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1.16 |
// makes dynamically allocated objects zero-initialised |
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1.4 |
struct zero_initialized { |
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void *operator new (size_t s); |
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void operator delete (void *p, size_t s); |
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}; |
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/* simplevec taken (and heavily modified), from: |
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* |
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* MICO --- a free CORBA implementation |
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* Copyright (C) 1997-98 Kay Roemer & Arno Puder |
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*/ |
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template<class T> |
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struct simplevec { |
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typedef T* iterator; |
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typedef const T* const_iterator; |
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typedef unsigned long size_type; |
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private: |
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size_type _last, _size; |
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T *_buf; |
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public: |
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const_iterator begin () const |
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{ |
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1.8 |
return &_buf[0]; |
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1.4 |
} |
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iterator begin () |
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{ |
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1.8 |
return &_buf[0]; |
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1.4 |
} |
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const_iterator end () const |
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{ |
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1.8 |
return &_buf[_last]; |
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1.4 |
} |
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iterator end () |
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{ |
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1.8 |
return &_buf[_last]; |
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1.4 |
} |
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size_type capacity () const |
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{ |
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1.8 |
return _size; |
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1.4 |
} |
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size_type size () const |
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{ |
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1.8 |
return _last; |
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1.4 |
} |
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private: |
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static T *alloc (size_type n) |
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{ |
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1.8 |
return (T *)::operator new ((size_t) (n * sizeof (T))); |
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1.4 |
} |
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static void dealloc (T *buf) |
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{ |
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1.8 |
if (buf) |
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::operator delete (buf); |
120 |
root |
1.4 |
} |
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void reserve (iterator where, size_type n) |
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{ |
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1.8 |
if (_last + n <= _size) { |
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memmove (where+n, where, (end ()-where)*sizeof (T)); |
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} else { |
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size_type sz = _last+n; |
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sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
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T *nbuf = alloc (sz); |
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if (_buf) { |
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memcpy (nbuf, begin (), (where-begin ())*sizeof (T)); |
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memcpy (nbuf + (where-begin ()) + n, where, |
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(end ()-where)*sizeof (T)); |
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dealloc (_buf); |
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} |
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_buf = nbuf; |
137 |
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_size = sz; |
138 |
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} |
139 |
root |
1.4 |
} |
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141 |
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public: |
142 |
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void reserve (size_type sz) |
143 |
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{ |
144 |
root |
1.8 |
if (_size < sz) { |
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sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
146 |
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T *nbuf = alloc (sz); |
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if (_buf) { |
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memcpy (nbuf, begin (), size ()*sizeof (T)); |
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dealloc (_buf); |
150 |
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} |
151 |
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_buf = nbuf; |
152 |
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_size = sz; |
153 |
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} |
154 |
root |
1.4 |
} |
155 |
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simplevec () |
156 |
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: _last(0), _size(0), _buf(0) |
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{ |
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} |
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simplevec (size_type n, const T& t = T ()) |
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: _last(0), _size(0), _buf(0) |
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{ |
162 |
root |
1.8 |
insert (begin (), n, t); |
163 |
root |
1.4 |
} |
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simplevec (const_iterator first, const_iterator last) |
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: _last(0), _size(0), _buf(0) |
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{ |
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root |
1.8 |
insert (begin (), first, last); |
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root |
1.4 |
} |
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simplevec (const simplevec<T> &v) |
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: _last(0), _size(0), _buf(0) |
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{ |
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root |
1.8 |
reserve (v._last); |
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memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
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_last = v._last; |
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root |
1.4 |
} |
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simplevec<T> &operator= (const simplevec<T> &v) |
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{ |
178 |
root |
1.8 |
if (this != &v) { |
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_last = 0; |
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reserve (v._last); |
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memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
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_last = v._last; |
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} |
184 |
root |
1.4 |
return *this; |
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} |
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~simplevec () |
187 |
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{ |
188 |
root |
1.8 |
dealloc (_buf); |
189 |
root |
1.4 |
} |
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const T &front () const |
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{ |
192 |
root |
1.8 |
//ministl_assert (size () > 0); |
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return _buf[0]; |
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root |
1.4 |
} |
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T &front () |
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{ |
197 |
root |
1.8 |
//ministl_assert (size () > 0); |
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return _buf[0]; |
199 |
root |
1.4 |
} |
200 |
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const T &back () const |
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{ |
202 |
root |
1.8 |
//ministl_assert (size () > 0); |
203 |
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return _buf[_last-1]; |
204 |
root |
1.4 |
} |
205 |
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T &back () |
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{ |
207 |
root |
1.8 |
//ministl_assert (size () > 0); |
208 |
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return _buf[_last-1]; |
209 |
root |
1.4 |
} |
210 |
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bool empty () const |
211 |
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{ |
212 |
root |
1.8 |
return _last == 0; |
213 |
root |
1.4 |
} |
214 |
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void clear () |
215 |
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{ |
216 |
root |
1.8 |
_last = 0; |
217 |
root |
1.4 |
} |
218 |
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void push_back (const T &t) |
219 |
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{ |
220 |
root |
1.8 |
reserve (_last+1); |
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*end () = t; |
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++_last; |
223 |
root |
1.4 |
} |
224 |
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void push_back (T &t) |
225 |
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{ |
226 |
root |
1.8 |
reserve (_last+1); |
227 |
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*end () = t; |
228 |
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++_last; |
229 |
root |
1.4 |
} |
230 |
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void pop_back () |
231 |
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{ |
232 |
root |
1.8 |
//ministl_assert (size () > 0); |
233 |
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--_last; |
234 |
root |
1.4 |
} |
235 |
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const T &operator[] (size_type idx) const |
236 |
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{ |
237 |
root |
1.8 |
//ministl_assert (idx < size ()); |
238 |
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return _buf[idx]; |
239 |
root |
1.4 |
} |
240 |
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T &operator[] (size_type idx) |
241 |
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{ |
242 |
root |
1.8 |
//ministl_assert (idx < size ()); |
243 |
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return _buf[idx]; |
244 |
root |
1.4 |
} |
245 |
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iterator insert (iterator pos, const T &t) |
246 |
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{ |
247 |
root |
1.8 |
//ministl_assert (pos <= end ()); |
248 |
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long at = pos - begin (); |
249 |
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reserve (pos, 1); |
250 |
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pos = begin ()+at; |
251 |
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*pos = t; |
252 |
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++_last; |
253 |
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return pos; |
254 |
root |
1.4 |
} |
255 |
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iterator insert (iterator pos, const_iterator first, const_iterator last) |
256 |
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{ |
257 |
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//ministl_assert (pos <= end ()); |
258 |
root |
1.8 |
long n = last - first; |
259 |
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long at = pos - begin (); |
260 |
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if (n > 0) { |
261 |
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reserve (pos, n); |
262 |
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pos = begin ()+at; |
263 |
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memcpy (pos, first, (last-first)*sizeof (T)); |
264 |
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_last += n; |
265 |
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} |
266 |
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return pos; |
267 |
root |
1.4 |
} |
268 |
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iterator insert (iterator pos, size_type n, const T &t) |
269 |
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{ |
270 |
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//ministl_assert (pos <= end ()); |
271 |
root |
1.8 |
long at = pos - begin (); |
272 |
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if (n > 0) { |
273 |
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reserve (pos, n); |
274 |
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pos = begin ()+at; |
275 |
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for (int i = 0; i < n; ++i) |
276 |
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pos[i] = t; |
277 |
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_last += n; |
278 |
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} |
279 |
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return pos; |
280 |
root |
1.4 |
} |
281 |
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void erase (iterator first, iterator last) |
282 |
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{ |
283 |
root |
1.8 |
if (last != first) { |
284 |
root |
1.18 |
memmove (first, last, (end () - last) * sizeof (T)); |
285 |
root |
1.8 |
_last -= last - first; |
286 |
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} |
287 |
root |
1.4 |
} |
288 |
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void erase (iterator pos) |
289 |
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{ |
290 |
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if (pos != end ()) { |
291 |
root |
1.18 |
memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T)); |
292 |
root |
1.4 |
--_last; |
293 |
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} |
294 |
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} |
295 |
root |
1.8 |
void swap (simplevec<T> &t) |
296 |
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{ |
297 |
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::swap(_last, t._last); |
298 |
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::swap(_size, t._size); |
299 |
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::swap(_buf, t._buf); |
300 |
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} |
301 |
root |
1.4 |
}; |
302 |
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303 |
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template<class T> |
304 |
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bool operator== (const simplevec<T> &v1, const simplevec<T> &v2) |
305 |
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{ |
306 |
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if (v1.size () != v2.size ()) |
307 |
root |
1.8 |
return false; |
308 |
root |
1.4 |
return !v1.size () || !memcmp (&v1[0], &v2[0], v1.size ()*sizeof (T)); |
309 |
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} |
310 |
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311 |
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template<class T> |
312 |
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bool operator< (const simplevec<T> &v1, const simplevec<T> &v2) |
313 |
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{ |
314 |
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unsigned long minlast = min (v1.size (), v2.size ()); |
315 |
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for (unsigned long i = 0; i < minlast; ++i) { |
316 |
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if (v1[i] < v2[i]) |
317 |
root |
1.8 |
return true; |
318 |
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if (v2[i] < v1[i]) |
319 |
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return false; |
320 |
root |
1.4 |
} |
321 |
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return v1.size () < v2.size (); |
322 |
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} |
323 |
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324 |
root |
1.1 |
|
325 |
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template<typename T> |
326 |
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struct vector : simplevec<T> |
327 |
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{ }; |
328 |
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329 |
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#if 0 |
330 |
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template<typename T> |
331 |
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struct rxvt_vec : simplevec<void *> { |
332 |
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typedef T *iterator; |
333 |
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334 |
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void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
335 |
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T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
336 |
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void erase (int i) { erase (begin () + i); } |
337 |
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void erase (iterator i) { simplevec<void *>::erase ((void **)i); } |
338 |
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iterator begin () const { return (iterator)simplevec<void *>::begin (); } |
339 |
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iterator end () const { return (iterator)simplevec<void *>::end (); } |
340 |
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T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
341 |
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const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
342 |
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}; |
343 |
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#endif |
344 |
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345 |
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template <typename I, typename T> |
346 |
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I find (I first, I last, const T& value) |
347 |
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{ |
348 |
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while (first != last && *first != value) |
349 |
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++first; |
350 |
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351 |
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return first; |
352 |
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} |
353 |
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354 |
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template<typename T> |
355 |
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struct auto_ptr { |
356 |
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T *p; |
357 |
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358 |
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auto_ptr () : p (0) { } |
359 |
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auto_ptr (T *a) : p (a) { } |
360 |
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361 |
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auto_ptr (auto_ptr<T> &a) |
362 |
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{ |
363 |
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p = a.p; |
364 |
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a.p = 0; |
365 |
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} |
366 |
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367 |
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template<typename A> |
368 |
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auto_ptr (auto_ptr<A> &a) |
369 |
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{ |
370 |
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p = a.p; |
371 |
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a.p = 0; |
372 |
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} |
373 |
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374 |
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~auto_ptr () |
375 |
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{ |
376 |
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delete p; |
377 |
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} |
378 |
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379 |
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// void because it makes sense in our context |
380 |
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void operator = (T *a) |
381 |
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{ |
382 |
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delete p; |
383 |
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p = a; |
384 |
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} |
385 |
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386 |
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void operator = (auto_ptr &a) |
387 |
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{ |
388 |
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*this = a.p; |
389 |
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a.p = 0; |
390 |
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} |
391 |
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392 |
|
|
template<typename A> |
393 |
|
|
void operator = (auto_ptr<A> &a) |
394 |
|
|
{ |
395 |
|
|
*this = a.p; |
396 |
|
|
a.p = 0; |
397 |
|
|
} |
398 |
|
|
|
399 |
|
|
operator T * () const { return p; } |
400 |
|
|
|
401 |
|
|
T *operator -> () const { return p; } |
402 |
|
|
T &operator * () const { return *p; } |
403 |
|
|
|
404 |
|
|
T *get () |
405 |
|
|
{ |
406 |
|
|
T *r = p; |
407 |
|
|
p = 0; |
408 |
|
|
return r; |
409 |
|
|
} |
410 |
|
|
}; |
411 |
|
|
|
412 |
|
|
typedef auto_ptr<char> auto_str; |
413 |
|
|
|
414 |
|
|
struct stringvec : simplevec<char *> |
415 |
|
|
{ |
416 |
|
|
~stringvec () |
417 |
|
|
{ |
418 |
|
|
for (char **c = begin (); c != end (); c++) |
419 |
root |
1.19 |
free (*c); |
420 |
root |
1.1 |
} |
421 |
|
|
}; |
422 |
root |
1.3 |
|
423 |
root |
1.20 |
// return a very temporary (and never deallocated) buffer. keep small. |
424 |
|
|
void *rxvt_temp_buf (int len); |
425 |
|
|
|
426 |
|
|
template<typename T> |
427 |
|
|
inline T * |
428 |
|
|
rxvt_temp_buf (int len) |
429 |
|
|
{ |
430 |
|
|
return (T *)rxvt_temp_buf (len * sizeof (T)); |
431 |
|
|
} |
432 |
|
|
|
433 |
root |
1.1 |
#endif |
434 |
|
|
|