1 | |
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2 | #ifndef NTL_WordVector__H |
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3 | #define NTL_WordVector__H |
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4 | |
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5 | /************************************************************** |
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6 | |
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7 | A WordVector is functionally similar to |
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8 | a generic NTL vector of _ntl_ulong. |
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9 | |
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10 | Be careful! the MaxLength() function does not return |
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11 | the max length ever set, but rather the max space allocated, |
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12 | which *may* be more. |
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13 | |
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14 | The FixLength() facility is not available. |
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15 | |
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16 | The reason for special-casing is efficiency (of course). |
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17 | |
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18 | **************************************************************/ |
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19 | |
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20 | |
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21 | |
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22 | #include <NTL/tools.h> |
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23 | #include <NTL/ZZ.h> |
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24 | |
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25 | NTL_OPEN_NNS |
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26 | |
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27 | |
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28 | |
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29 | #ifndef NTL_RANGE_CHECK |
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30 | #define NTL_WV_RANGE_CHECK_CODE |
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31 | #else |
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32 | #define NTL_WV_RANGE_CHECK_CODE if (i < 0 || !rep || i >= long(rep[-1])) RangeError(i); |
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33 | #endif |
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34 | |
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35 | // vectors are allocated in chunks of this size |
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36 | |
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37 | #ifndef NTL_WordVectorMinAlloc |
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38 | #define NTL_WordVectorMinAlloc (4) |
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39 | #endif |
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40 | |
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41 | // vectors are always expanded by at least this ratio |
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42 | |
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43 | #ifndef NTL_WordVectorExpansionRatio |
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44 | #define NTL_WordVectorExpansionRatio (1.2) |
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45 | #endif |
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46 | |
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47 | // controls initialization during input |
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48 | |
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49 | #ifndef NTL_WordVectorInputBlock |
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50 | #define NTL_WordVectorInputBlock 50 |
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51 | #endif |
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52 | |
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53 | |
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54 | class WordVector { |
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55 | public: |
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56 | _ntl_ulong *rep; |
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57 | void RangeError(long i) const; |
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58 | |
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59 | WordVector(WordVector& x, INIT_TRANS_TYPE) { rep = x.rep; x.rep = 0; } |
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60 | |
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61 | |
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62 | |
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63 | WordVector() { rep = 0; } |
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64 | WordVector(INIT_SIZE_TYPE, long n) { rep = 0; DoSetLength(n); } |
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65 | WordVector(const WordVector& a) { rep = 0; *this = a; } |
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66 | |
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67 | WordVector& operator=(const WordVector& a); |
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68 | |
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69 | ~WordVector(); |
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70 | void kill(); |
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71 | |
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72 | void DoSetLength(long n); |
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73 | |
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74 | void SetLength(long n) |
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75 | { |
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76 | _ntl_ulong *x = rep; |
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77 | if (x && long(x[-2] >> 1) >= n && n >= 0) |
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78 | x[-1] = n; |
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79 | else |
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80 | DoSetLength(n); |
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81 | } |
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82 | |
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83 | void ZeroLength() { if (rep) rep[-1] = 0; } |
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84 | |
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85 | void SetMaxLength(long n); |
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86 | void QuickSetLength(long n) { rep[-1] = _ntl_ulong(n); } |
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87 | |
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88 | long length() const { return (!rep) ? 0 : long(rep[-1]); } |
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89 | long MaxLength() const |
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90 | { return (!rep) ? 0 : long(rep[-2] >> 1); } |
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91 | |
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92 | _ntl_ulong& operator[](long i) |
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93 | { |
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94 | NTL_WV_RANGE_CHECK_CODE |
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95 | return rep[i]; |
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96 | } |
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97 | |
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98 | const _ntl_ulong& operator[](long i) const |
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99 | { |
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100 | NTL_WV_RANGE_CHECK_CODE |
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101 | return rep[i]; |
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102 | } |
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103 | |
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104 | _ntl_ulong& operator()(long i) { return (*this)[i-1]; } |
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105 | const _ntl_ulong& operator()(long i) const { return (*this)[i-1]; } |
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106 | |
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107 | |
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108 | const _ntl_ulong* elts() const { return rep; } |
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109 | _ntl_ulong* elts() { return rep; } |
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110 | |
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111 | static void swap_impl(WordVector& x, WordVector& y); |
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112 | static void append_impl(WordVector& v, _ntl_ulong a); |
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113 | static void append_impl(WordVector& v, const WordVector& w); |
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114 | }; |
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115 | |
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116 | inline void swap(WordVector& x, WordVector& y) |
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117 | { WordVector::swap_impl(x, y); } |
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118 | |
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119 | inline void append(WordVector& v, _ntl_ulong a) |
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120 | { WordVector::append_impl(v, a); } |
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121 | |
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122 | inline void append(WordVector& v, const WordVector& w) |
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123 | { WordVector::append_impl(v, w); } |
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124 | |
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125 | |
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126 | long operator==(const WordVector& a, const WordVector& b); |
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127 | long operator!=(const WordVector& a, const WordVector& b); |
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128 | |
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129 | |
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130 | long InnerProduct(const WordVector& a, const WordVector& b); |
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131 | |
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132 | void ShiftAdd(_ntl_ulong *cp, const _ntl_ulong* ap, long sa, long n); |
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133 | // cp = cp + (a << n) |
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134 | |
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135 | |
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136 | long WV_BlockConstructAlloc(WordVector& x, long d, long n); |
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137 | |
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138 | void WV_BlockConstructSet(WordVector& x, WordVector& y, long i); |
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139 | |
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140 | long WV_BlockDestroy(WordVector& x); |
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141 | |
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142 | long WV_storage(long d); |
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143 | |
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144 | |
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145 | |
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146 | |
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147 | |
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148 | NTL_CLOSE_NNS |
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149 | |
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150 | #endif |
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