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1 /* |
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2 |
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3 Copyright (C) 2003 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_dim_vector_h) |
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24 #define octave_dim_vector_h 1 |
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25 |
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26 #if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) |
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27 #pragma interface |
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28 #endif |
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29 |
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30 #include <cassert> |
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31 #include <string> |
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32 |
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33 #include "lo-sstream.h" |
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34 |
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35 class |
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36 dim_vector |
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37 { |
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38 public: |
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39 |
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40 dim_vector (void) : ndims (0), dims (0) { } |
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41 |
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42 dim_vector (int n) : ndims (1), dims (new int [1]) { dims[0] = n; } |
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43 |
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44 dim_vector (int r, int c) |
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45 : ndims (2), dims (new int [2]) { dims[0] = r; dims[1] = c; } |
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46 |
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47 dim_vector (int r, int c, int p) |
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48 : ndims (3), dims (new int [3]) { dims[0] = r; dims[1] = c; dims[2] = p; } |
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49 |
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50 dim_vector (const dim_vector& dv) |
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51 : ndims (dv.ndims) |
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52 { |
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53 if (dv.dims) |
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54 { |
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55 dims = new int [ndims]; |
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56 |
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57 for (int i = 0; i < ndims; i++) |
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58 dims[i] = dv.dims[i]; |
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59 } |
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60 else |
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61 dims = 0; |
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62 } |
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63 |
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64 dim_vector& operator = (const dim_vector& dv) |
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65 { |
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66 if (&dv != this) |
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67 { |
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68 ndims = dv.ndims; |
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69 |
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70 if (dv.dims) |
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71 { |
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72 dims = new int [ndims]; |
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73 |
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74 for (int i = 0; i < ndims; i++) |
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75 dims[i] = dv.dims[i]; |
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76 } |
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77 } |
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78 |
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79 return *this; |
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80 } |
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81 |
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82 ~dim_vector (void) { delete [] dims; } |
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83 |
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84 int length (void) const { return ndims; } |
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85 |
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86 int& elem (int i) |
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87 { |
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88 if (i >= ndims) |
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89 resize (i+1); |
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90 |
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91 return dims[i]; |
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92 } |
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93 |
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94 int elem (int i) const { return i < ndims ? dims[i] : -1; } |
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95 |
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96 int& operator () (int i) { return elem (i); } |
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97 |
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98 int operator () (int i) const { return elem (i); } |
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99 |
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100 void resize (int n) |
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101 { |
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102 if (n > ndims) |
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103 { |
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104 int *new_dims = new int [n]; |
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105 |
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106 for (int i = 0; i < ndims; i++) |
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107 new_dims[i] = dims[i]; |
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108 |
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109 for (int i = ndims; i < n; i++) |
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110 new_dims[i] = 0; |
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111 |
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112 delete [] dims; |
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113 |
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114 dims = new_dims; |
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115 |
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116 ndims = n; |
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117 } |
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118 else |
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119 ndims = n; |
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120 } |
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121 |
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122 std::string str (void) const |
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123 { |
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124 OSSTREAM buf; |
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125 |
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126 for (int i = 0; i < ndims; i++) |
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127 { |
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128 buf << dims[i]; |
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129 |
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130 if (i < ndims - 1) |
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131 buf << "x"; |
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132 } |
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133 |
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134 buf << OSSTREAM_ENDS; |
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135 |
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136 std::string retval = OSSTREAM_STR (buf); |
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137 |
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138 OSSTREAM_FREEZE (buf); |
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139 |
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140 return retval; |
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141 } |
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142 |
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143 bool all_zero (void) const |
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144 { |
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145 bool retval = true; |
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146 |
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147 for (int i = 0; i < ndims; i++) |
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148 { |
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149 if (dims[i] != 0) |
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150 { |
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151 retval = false; |
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152 break; |
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153 } |
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154 } |
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155 |
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156 return retval; |
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157 } |
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158 |
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159 private: |
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160 |
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161 int ndims; |
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162 int *dims; |
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163 }; |
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164 |
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165 static inline bool |
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166 operator == (const dim_vector& a, const dim_vector& b) |
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167 { |
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168 bool retval = true; |
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169 |
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170 int a_len = a.length (); |
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171 int b_len = b.length (); |
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172 |
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173 if (a_len != b_len) |
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174 retval = false; |
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175 else |
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176 { |
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177 for (int i = 0; i < a_len; i++) |
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178 { |
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179 if (a(i) != b(i)) |
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180 { |
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181 retval = false; |
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182 break; |
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183 } |
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184 } |
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185 } |
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186 |
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187 return retval; |
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188 } |
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189 |
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190 static inline bool |
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191 operator != (const dim_vector& a, const dim_vector& b) |
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192 { |
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193 return ! operator == (a, b); |
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194 } |
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195 |
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196 #endif |
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197 |
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198 /* |
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199 ;;; Local Variables: *** |
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200 ;;; mode: C++ *** |
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201 ;;; End: *** |
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202 */ |
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203 |
