1 | #ifndef RXVT_UTIL_H |
1 | #ifndef RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
3 | |
3 | |
4 | #include <cstdlib> |
4 | #include <stdlib.h> |
5 | #include <cstring> |
5 | #include <string.h> |
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6 | #include "ecb.h" |
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7 | #include "estl.h" |
6 | |
8 | |
7 | using namespace std; |
9 | #include "emman.h" |
8 | |
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9 | #define PP_CONCAT_(a, b) a ## b |
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10 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
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11 | #define PP_STRINGIFY_(a) #a |
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12 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
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13 | |
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14 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4)) |
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15 | |
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16 | #if __GNUC__ >= 4 |
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17 | # define rxvt_attribute(x) __attribute__(x) |
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18 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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19 | #else |
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20 | # define rxvt_attribute(x) |
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21 | # define expect(expr,value) (expr) |
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22 | #endif |
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23 | |
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24 | // put into ifs if you are very sure that the expression |
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25 | // is mostly true or mosty false. note that these return |
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26 | // booleans, not the expression. |
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27 | #define expect_false(expr) expect ((expr) != 0, 0) |
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28 | #define expect_true(expr) expect ((expr) != 0, 1) |
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29 | |
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30 | #define NORETURN rxvt_attribute ((noreturn)) |
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31 | #define UNUSED rxvt_attribute ((unused)) |
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32 | #define CONST rxvt_attribute ((const)) |
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33 | |
10 | |
34 | // increases code size unless -fno-enforce-eh-specs |
11 | // increases code size unless -fno-enforce-eh-specs |
35 | #if __GNUC__ |
12 | #if __GNUC__ |
36 | # define NOTHROW |
13 | # define NOTHROW |
37 | # define THROW(x) |
14 | # define THROW(x) |
38 | #else |
15 | #else |
39 | # define NOTHROW throw() |
16 | # define NOTHROW throw() |
40 | # define THROW(x) throw x |
17 | # define THROW(x) throw x |
41 | #endif |
18 | #endif |
42 | |
19 | |
43 | extern class byteorder { |
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44 | static unsigned int e; // at least 32 bits |
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45 | public: |
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46 | byteorder (); |
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47 | |
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48 | static bool big_endian () { return e == 0x11223344; }; |
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49 | static bool network () { return e == 0x11223344; }; |
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50 | static bool little_endian () { return e == 0x44332211; }; |
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51 | static bool vax () { return e == 0x44332211; }; |
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52 | } byteorder; |
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53 | |
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54 | // various utility functions |
20 | // various utility functions |
55 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
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56 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
21 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
57 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
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58 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
22 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
59 | |
23 | |
60 | 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; } |
24 | 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; } |
61 | 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; } |
25 | 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; } |
62 | |
26 | |
63 | 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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64 | |
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65 | template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); } |
27 | template<typename T> static inline T squared_diff (T a, T b) { return (a - b) * (a - b); } |
66 | |
28 | |
67 | // linear interpolation |
29 | // linear interpolation |
68 | template<typename T, typename U, typename P> |
30 | template<typename T, typename U, typename P> |
69 | static inline |
31 | static inline T |
70 | T lerp (T a, U b, P p) |
32 | lerp (T a, U b, P p) |
71 | { |
33 | { |
72 | return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100; |
34 | return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100; |
73 | } |
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74 | |
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75 | template <typename I, typename T> |
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76 | I find (I first, I last, const T& value) |
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77 | { |
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78 | while (first != last && *first != value) |
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79 | ++first; |
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80 | |
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81 | return first; |
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82 | } |
35 | } |
83 | |
36 | |
84 | // return a very temporary (and never deallocated) buffer. keep small. |
37 | // return a very temporary (and never deallocated) buffer. keep small. |
85 | void *rxvt_temp_buf (int len); |
38 | void *rxvt_temp_buf (int len); |
86 | |
39 | |
… | |
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88 | static inline T * |
41 | static inline T * |
89 | rxvt_temp_buf (int len) |
42 | rxvt_temp_buf (int len) |
90 | { |
43 | { |
91 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
44 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
92 | } |
45 | } |
93 | |
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94 | // some bit functions, xft fuck me plenty |
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95 | #if HAVE_GCC_BUILTINS |
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96 | static inline int ctz (unsigned int x) { return __builtin_ctz (x); } |
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97 | static inline int popcount (unsigned int x) { return __builtin_popcount (x); } |
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98 | #else |
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99 | // count trailing zero bits and count # of one bits |
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100 | int ctz (unsigned int x) CONST; |
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101 | int popcount (unsigned int x) CONST; |
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102 | #endif |
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103 | |
46 | |
104 | // in range including end |
47 | // in range including end |
105 | #define IN_RANGE_INC(val,beg,end) \ |
48 | #define IN_RANGE_INC(val,beg,end) \ |
106 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
49 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
107 | |
50 | |
… | |
… | |
111 | |
54 | |
112 | // for m >= -n, ensure remainder lies between 0..n-1 |
55 | // for m >= -n, ensure remainder lies between 0..n-1 |
113 | #define MOD(m,n) (((m) + (n)) % (n)) |
56 | #define MOD(m,n) (((m) + (n)) % (n)) |
114 | |
57 | |
115 | // makes dynamically allocated objects zero-initialised |
58 | // makes dynamically allocated objects zero-initialised |
116 | struct zero_initialized { |
59 | struct zero_initialized |
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60 | { |
117 | void *operator new (size_t s); |
61 | void *operator new (size_t s); |
118 | void operator delete (void *p, size_t s); |
62 | void operator delete (void *p, size_t s); |
119 | }; |
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120 | |
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121 | /* simplevec taken (and heavily modified), from: |
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122 | * |
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123 | * MICO --- a free CORBA implementation |
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124 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
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125 | */ |
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126 | template<class T> |
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127 | struct simplevec { |
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128 | typedef T* iterator; |
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129 | typedef const T* const_iterator; |
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130 | typedef unsigned long size_type; |
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131 | |
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132 | private: |
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133 | size_type _last, _size; |
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134 | T *_buf; |
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135 | |
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136 | public: |
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137 | const_iterator begin () const |
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138 | { |
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139 | return &_buf[0]; |
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140 | } |
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141 | iterator begin () |
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142 | { |
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143 | return &_buf[0]; |
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144 | } |
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145 | const_iterator end () const |
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146 | { |
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147 | return &_buf[_last]; |
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148 | } |
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149 | iterator end () |
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150 | { |
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151 | return &_buf[_last]; |
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152 | } |
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153 | size_type capacity () const |
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154 | { |
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155 | return _size; |
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156 | } |
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157 | size_type size () const |
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158 | { |
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159 | return _last; |
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160 | } |
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161 | |
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162 | private: |
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163 | static T *alloc (size_type n) |
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164 | { |
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165 | return (T *)::operator new ((size_t) (n * sizeof (T))); |
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166 | } |
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167 | static void dealloc (T *buf) |
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168 | { |
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169 | if (buf) |
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170 | ::operator delete (buf); |
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171 | } |
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172 | |
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173 | void reserve (iterator where, size_type n) |
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174 | { |
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175 | if (_last + n <= _size) { |
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176 | memmove (where+n, where, (end ()-where)*sizeof (T)); |
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177 | } else { |
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178 | size_type sz = _last+n; |
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179 | sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
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180 | T *nbuf = alloc (sz); |
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181 | if (_buf) { |
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182 | memcpy (nbuf, begin (), (where-begin ())*sizeof (T)); |
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183 | memcpy (nbuf + (where-begin ()) + n, where, |
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184 | (end ()-where)*sizeof (T)); |
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185 | dealloc (_buf); |
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186 | } |
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187 | _buf = nbuf; |
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188 | _size = sz; |
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189 | } |
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190 | } |
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191 | |
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192 | public: |
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193 | void reserve (size_type sz) |
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194 | { |
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195 | if (_size < sz) { |
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196 | sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
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197 | T *nbuf = alloc (sz); |
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198 | if (_buf) { |
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199 | memcpy (nbuf, begin (), size ()*sizeof (T)); |
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200 | dealloc (_buf); |
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201 | } |
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202 | _buf = nbuf; |
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203 | _size = sz; |
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204 | } |
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205 | } |
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206 | simplevec () |
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207 | : _last(0), _size(0), _buf(0) |
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208 | { |
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209 | } |
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210 | simplevec (size_type n, const T& t = T ()) |
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211 | : _last(0), _size(0), _buf(0) |
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212 | { |
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213 | insert (begin (), n, t); |
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214 | } |
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215 | simplevec (const_iterator first, const_iterator last) |
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216 | : _last(0), _size(0), _buf(0) |
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217 | { |
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218 | insert (begin (), first, last); |
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219 | } |
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220 | simplevec (const simplevec<T> &v) |
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221 | : _last(0), _size(0), _buf(0) |
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222 | { |
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223 | reserve (v._last); |
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224 | memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
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225 | _last = v._last; |
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226 | } |
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227 | simplevec<T> &operator= (const simplevec<T> &v) |
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228 | { |
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229 | if (this != &v) { |
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230 | _last = 0; |
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231 | reserve (v._last); |
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232 | memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
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233 | _last = v._last; |
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234 | } |
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235 | return *this; |
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236 | } |
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237 | ~simplevec () |
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238 | { |
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239 | dealloc (_buf); |
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240 | } |
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241 | const T &front () const |
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242 | { |
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243 | //ministl_assert (size () > 0); |
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244 | return _buf[0]; |
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245 | } |
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246 | T &front () |
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247 | { |
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248 | //ministl_assert (size () > 0); |
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249 | return _buf[0]; |
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250 | } |
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251 | const T &back () const |
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252 | { |
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253 | //ministl_assert (size () > 0); |
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254 | return _buf[_last-1]; |
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255 | } |
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256 | T &back () |
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257 | { |
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258 | //ministl_assert (size () > 0); |
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259 | return _buf[_last-1]; |
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260 | } |
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261 | bool empty () const |
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262 | { |
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263 | return _last == 0; |
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264 | } |
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265 | void clear () |
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266 | { |
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267 | _last = 0; |
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268 | } |
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269 | void push_back (const T &t) |
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270 | { |
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271 | reserve (_last+1); |
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272 | *end () = t; |
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273 | ++_last; |
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274 | } |
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275 | void push_back (T &t) |
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276 | { |
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277 | reserve (_last+1); |
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278 | *end () = t; |
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279 | ++_last; |
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280 | } |
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281 | void pop_back () |
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282 | { |
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283 | //ministl_assert (size () > 0); |
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284 | --_last; |
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285 | } |
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286 | const T &operator[] (size_type idx) const |
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287 | { |
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288 | //ministl_assert (idx < size ()); |
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289 | return _buf[idx]; |
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290 | } |
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291 | T &operator[] (size_type idx) |
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292 | { |
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293 | //ministl_assert (idx < size ()); |
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294 | return _buf[idx]; |
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295 | } |
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296 | iterator insert (iterator pos, const T &t) |
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297 | { |
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298 | //ministl_assert (pos <= end ()); |
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299 | long at = pos - begin (); |
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300 | reserve (pos, 1); |
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301 | pos = begin ()+at; |
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302 | *pos = t; |
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303 | ++_last; |
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304 | return pos; |
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305 | } |
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306 | iterator insert (iterator pos, const_iterator first, const_iterator last) |
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307 | { |
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308 | //ministl_assert (pos <= end ()); |
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309 | long n = last - first; |
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310 | long at = pos - begin (); |
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311 | if (n > 0) { |
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312 | reserve (pos, n); |
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313 | pos = begin ()+at; |
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314 | memcpy (pos, first, (last-first)*sizeof (T)); |
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315 | _last += n; |
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316 | } |
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317 | return pos; |
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318 | } |
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319 | iterator insert (iterator pos, size_type n, const T &t) |
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320 | { |
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321 | //ministl_assert (pos <= end ()); |
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322 | long at = pos - begin (); |
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323 | if (n > 0) { |
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324 | reserve (pos, n); |
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325 | pos = begin ()+at; |
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326 | for (int i = 0; i < n; ++i) |
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327 | pos[i] = t; |
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328 | _last += n; |
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329 | } |
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330 | return pos; |
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331 | } |
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332 | void erase (iterator first, iterator last) |
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333 | { |
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334 | if (last != first) { |
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335 | memmove (first, last, (end () - last) * sizeof (T)); |
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336 | _last -= last - first; |
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337 | } |
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338 | } |
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339 | void erase (iterator pos) |
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340 | { |
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341 | if (pos != end ()) { |
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342 | memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T)); |
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343 | --_last; |
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344 | } |
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345 | } |
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346 | void swap (simplevec<T> &t) |
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347 | { |
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348 | ::swap(_last, t._last); |
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349 | ::swap(_size, t._size); |
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350 | ::swap(_buf, t._buf); |
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351 | } |
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352 | }; |
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353 | |
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354 | template<class T> |
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355 | bool operator== (const simplevec<T> &v1, const simplevec<T> &v2) |
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356 | { |
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357 | if (v1.size () != v2.size ()) |
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358 | return false; |
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359 | return !v1.size () || !memcmp (&v1[0], &v2[0], v1.size ()*sizeof (T)); |
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360 | } |
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361 | |
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362 | template<class T> |
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363 | bool operator< (const simplevec<T> &v1, const simplevec<T> &v2) |
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364 | { |
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365 | unsigned long minlast = min (v1.size (), v2.size ()); |
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366 | for (unsigned long i = 0; i < minlast; ++i) { |
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367 | if (v1[i] < v2[i]) |
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368 | return true; |
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369 | if (v2[i] < v1[i]) |
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370 | return false; |
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371 | } |
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372 | return v1.size () < v2.size (); |
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373 | } |
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374 | |
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375 | |
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376 | template<typename T> |
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377 | struct vector : simplevec<T> |
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378 | { |
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379 | }; |
63 | }; |
380 | |
64 | |
381 | struct stringvec : simplevec<char *> |
65 | struct stringvec : simplevec<char *> |
382 | { |
66 | { |
383 | ~stringvec () |
67 | ~stringvec () |
… | |
… | |
387 | } |
71 | } |
388 | }; |
72 | }; |
389 | |
73 | |
390 | #if 0 |
74 | #if 0 |
391 | template<typename T> |
75 | template<typename T> |
392 | struct rxvt_vec : simplevec<void *> { |
76 | struct rxvt_vec : simplevec<void *> |
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77 | { |
393 | typedef T *iterator; |
78 | typedef T *iterator; |
394 | |
79 | |
395 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
80 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
396 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
81 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
397 | void erase (int i) { erase (begin () + i); } |
82 | void erase (int i) { erase (begin () + i); } |
… | |
… | |
401 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
86 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
402 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
87 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
403 | }; |
88 | }; |
404 | #endif |
89 | #endif |
405 | |
90 | |
406 | template<typename T> |
91 | typedef estl::scoped_array<char> auto_str; |
407 | struct auto_ptr { |
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408 | T *p; |
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409 | |
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410 | auto_ptr () : p (0) { } |
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411 | auto_ptr (T *a) : p (a) { } |
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412 | |
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413 | auto_ptr (auto_ptr<T> &a) |
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414 | { |
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415 | p = a.p; |
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416 | a.p = 0; |
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417 | } |
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418 | |
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419 | template<typename A> |
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420 | auto_ptr (auto_ptr<A> &a) |
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421 | { |
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422 | p = a.p; |
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423 | a.p = 0; |
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424 | } |
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425 | |
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426 | ~auto_ptr () |
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427 | { |
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428 | delete p; |
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429 | } |
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430 | |
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431 | // void because it makes sense in our context |
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432 | void operator = (T *a) |
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433 | { |
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434 | delete p; |
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435 | p = a; |
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436 | } |
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437 | |
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438 | void operator = (auto_ptr &a) |
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439 | { |
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440 | *this = a.p; |
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441 | a.p = 0; |
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442 | } |
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443 | |
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444 | template<typename A> |
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445 | void operator = (auto_ptr<A> &a) |
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446 | { |
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447 | *this = a.p; |
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448 | a.p = 0; |
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449 | } |
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450 | |
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451 | operator T * () const { return p; } |
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452 | |
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453 | T *operator -> () const { return p; } |
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454 | T &operator * () const { return *p; } |
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455 | |
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456 | T *get () |
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457 | { |
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458 | T *r = p; |
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459 | p = 0; |
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460 | return r; |
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461 | } |
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462 | }; |
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463 | |
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464 | typedef auto_ptr<char> auto_str; |
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465 | |
92 | |
466 | #endif |
93 | #endif |
467 | |
94 | |