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1 // Very simple integer vectors for indexing -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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24 #ifdef __GNUG__ |
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25 #pragma implementation |
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26 #endif |
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27 |
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164
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28 #include <iostream.h> |
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29 |
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30 #include "Matrix.h" |
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31 #include "Range.h" |
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32 #include "idx-vector.h" |
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164
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33 #include "user-prefs.h" |
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34 #include "error.h" |
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35 #include "utils.h" |
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36 |
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37 idx_vector::idx_vector (const idx_vector& a) |
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38 { |
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191
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39 initialized = a.initialized; |
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40 |
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41 len = a.len; |
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42 if (len > 0) |
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43 { |
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44 data = new int [len]; |
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45 for (int i = 0; i < len; i++) |
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46 data[i] = a.data[i]; |
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47 |
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48 num_zeros = a.num_zeros; |
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49 num_ones = a.num_ones; |
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50 one_zero = a.one_zero; |
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51 |
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52 max_val = a.max_val; |
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53 min_val = a.min_val; |
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54 } |
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55 else |
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191
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56 data = (int *) 0; |
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57 } |
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58 |
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59 static inline int |
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60 tree_to_mat_idx (double x) |
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61 { |
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62 if (x > 0) |
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63 return ((int) (x + 0.5) - 1); |
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64 else |
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65 return ((int) (x - 0.5) - 1); |
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66 } |
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67 |
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68 idx_vector::idx_vector (const Matrix& m, int do_ftn_idx, |
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69 const char *rc, int z_len = 0) |
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70 { |
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71 initialized = 0; |
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72 |
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73 int nr = m.rows (); |
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74 int nc = m.columns (); |
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75 |
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76 if (nr == 0 || nc == 0) |
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77 { |
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78 len = 0; |
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79 data = (int *) 0; |
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80 num_zeros = 0; |
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81 num_ones = 0; |
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82 one_zero = 0; |
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83 initialized = 1; |
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84 return; |
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85 } |
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86 else if (nr > 1 && nc > 1 && do_ftn_idx) |
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87 { |
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88 double *cop_out = m.fortran_vec (); |
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89 len = nr * nc; |
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90 data = new int [len]; |
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91 for (int i = 0; i < len; i++) |
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92 data[i] = tree_to_mat_idx (*cop_out++); |
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93 } |
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94 else if (nr == 1 && nc > 0) |
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95 { |
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96 len = nc; |
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97 data = new int [len]; |
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98 for (int i = 0; i < len; i++) |
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99 data[i] = tree_to_mat_idx (m.elem (0, i)); |
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100 } |
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101 else if (nc == 1 && nr > 0) |
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102 { |
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103 len = nr; |
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104 data = new int [len]; |
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105 for (int i = 0; i < len; i++) |
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106 data[i] = tree_to_mat_idx (m.elem (i, 0)); |
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107 } |
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108 else |
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109 { |
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110 error ("invalid matrix used as index"); |
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111 return; |
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112 } |
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113 |
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114 init_state (rc, z_len); |
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115 } |
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116 |
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117 idx_vector::idx_vector (const Range& r) |
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118 { |
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119 initialized = 0; |
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120 |
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121 len = r.nelem (); |
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122 |
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123 if (len < 0) |
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124 { |
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125 error ("invalid range used as index"); |
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126 return; |
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127 } |
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128 else if (len == 0) |
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129 { |
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130 data = (int *) 0; |
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131 num_zeros = 0; |
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132 num_ones = 0; |
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133 one_zero = 0; |
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134 initialized = 1; |
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135 return; |
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136 } |
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137 |
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138 double b = r.base (); |
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139 double step = r.inc (); |
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140 |
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141 data = new int [len]; |
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142 |
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143 for (int i = 0; i < len; i++) |
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144 { |
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145 double val = b + i * step; |
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146 data[i] = tree_to_mat_idx (val); |
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147 } |
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148 |
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149 init_state (); |
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150 } |
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151 |
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152 idx_vector& |
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153 idx_vector::operator = (const idx_vector& a) |
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154 { |
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155 if (this != &a) |
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156 { |
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191
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157 initialized = a.initialized; |
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158 |
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159 delete [] data; |
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160 len = a.len; |
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161 data = new int [len]; |
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162 for (int i = 0; i < len; i++) |
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163 data[i] = a.data[i]; |
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164 |
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165 num_zeros = a.num_zeros; |
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166 num_ones = a.num_ones; |
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167 one_zero = a.one_zero; |
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168 |
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169 max_val = a.max_val; |
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170 min_val = a.min_val; |
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171 } |
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172 return *this; |
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173 } |
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174 |
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175 void |
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176 idx_vector::init_state (const char *rc, int z_len = 0) |
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177 { |
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178 one_zero = 1; |
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179 num_zeros = 0; |
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180 num_ones = 0; |
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181 |
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182 min_val = max_val = data[0]; |
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183 |
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184 int i = 0; |
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185 do |
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186 { |
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187 if (data[i] == -1) |
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188 num_zeros++; |
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189 else if (data[i] == 0) |
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190 num_ones++; |
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191 |
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192 if (one_zero && data[i] != -1 && data[i] != 0) |
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193 one_zero = 0; |
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194 |
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195 if (data[i] > max_val) |
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196 max_val = data[i]; |
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197 |
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198 if (data[i] < min_val) |
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199 min_val = data[i]; |
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200 } |
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201 while (++i < len); |
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202 |
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203 if (one_zero && z_len == len) |
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204 { |
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205 if (num_zeros == len) |
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206 { |
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207 delete [] data; |
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208 len = 0; |
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209 data = (int *) 0; |
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210 num_zeros = 0; |
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211 num_ones = 0; |
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212 one_zero = 0; |
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213 } |
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214 else if (num_ones != len || user_pref.prefer_zero_one_indexing) |
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215 convert_one_zero_to_idx (); |
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216 } |
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217 else if (min_val < 0) |
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218 { |
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219 error ("%s index %d out of range", rc, min_val+1); |
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220 initialized = 0; |
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221 return; |
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222 } |
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223 |
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224 initialized = 1; |
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225 } |
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226 |
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227 void |
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228 idx_vector::convert_one_zero_to_idx (void) |
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229 { |
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230 if (num_ones == 0) |
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231 { |
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232 len = 0; |
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233 max_val = 0; |
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234 min_val = 0; |
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235 delete [] data; |
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236 } |
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237 else |
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238 { |
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239 assert (num_ones + num_zeros == len); |
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240 |
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241 int *new_data = new int [num_ones]; |
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242 int count = 0; |
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243 for (int i = 0; i < len; i++) |
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244 if (data[i] == 0) |
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245 new_data[count++] = i; |
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246 |
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247 delete [] data; |
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248 len = num_ones; |
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249 data = new_data; |
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250 |
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251 min_val = max_val = data[0]; |
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252 |
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253 i = 0; |
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254 do |
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255 { |
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256 if (data[i] > max_val) |
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257 max_val = data[i]; |
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258 |
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259 if (data[i] < min_val) |
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260 min_val = data[i]; |
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261 } |
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262 while (++i < len); |
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263 } |
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264 } |
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265 |
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266 ostream& |
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267 operator << (ostream& os, const idx_vector& a) |
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268 { |
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269 for (int i = 0; i < a.len; i++) |
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270 os << a.data[i] << "\n"; |
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271 return os; |
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272 } |
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273 |
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274 /* |
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275 ;;; Local Variables: *** |
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276 ;;; mode: C++ *** |
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277 ;;; page-delimiter: "^/\\*" *** |
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278 ;;; End: *** |
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279 */ |
