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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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209
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29 #include <stdlib.h> |
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30 |
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31 #include "Matrix.h" |
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32 #include "Range.h" |
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33 #include "idx-vector.h" |
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164
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34 #include "user-prefs.h" |
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35 #include "error.h" |
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36 #include "utils.h" |
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37 |
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38 idx_vector::idx_vector (const idx_vector& a) |
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39 { |
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191
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40 initialized = a.initialized; |
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41 |
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42 len = a.len; |
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43 if (len > 0) |
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44 { |
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45 data = new int [len]; |
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46 for (int i = 0; i < len; i++) |
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47 data[i] = a.data[i]; |
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48 |
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49 num_zeros = a.num_zeros; |
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50 num_ones = a.num_ones; |
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51 one_zero = a.one_zero; |
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52 |
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53 max_val = a.max_val; |
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54 min_val = a.min_val; |
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55 } |
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56 else |
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191
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57 data = (int *) 0; |
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58 } |
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59 |
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60 static inline int |
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61 tree_to_mat_idx (double x) |
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62 { |
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63 if (x > 0) |
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64 return ((int) (x + 0.5) - 1); |
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65 else |
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66 return ((int) (x - 0.5) - 1); |
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67 } |
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68 |
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164
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69 idx_vector::idx_vector (const Matrix& m, int do_ftn_idx, |
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70 const char *rc, int z_len = 0) |
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71 { |
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191
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72 initialized = 0; |
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73 |
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74 int nr = m.rows (); |
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75 int nc = m.columns (); |
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76 |
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77 if (nr == 0 || nc == 0) |
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78 { |
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79 len = 0; |
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80 data = (int *) 0; |
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81 num_zeros = 0; |
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82 num_ones = 0; |
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83 one_zero = 0; |
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191
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84 initialized = 1; |
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85 return; |
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86 } |
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87 else if (nr > 1 && nc > 1 && do_ftn_idx) |
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88 { |
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89 double *cop_out = m.fortran_vec (); |
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90 len = nr * nc; |
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91 data = new int [len]; |
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92 for (int i = 0; i < len; i++) |
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93 data[i] = tree_to_mat_idx (*cop_out++); |
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94 } |
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95 else if (nr == 1 && nc > 0) |
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96 { |
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97 len = nc; |
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98 data = new int [len]; |
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99 for (int i = 0; i < len; i++) |
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100 data[i] = tree_to_mat_idx (m.elem (0, i)); |
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101 } |
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102 else if (nc == 1 && nr > 0) |
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103 { |
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104 len = nr; |
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105 data = new int [len]; |
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106 for (int i = 0; i < len; i++) |
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107 data[i] = tree_to_mat_idx (m.elem (i, 0)); |
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108 } |
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109 else |
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110 { |
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111 error ("invalid matrix used as index"); |
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112 return; |
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113 } |
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114 |
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115 init_state (rc, z_len); |
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116 } |
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117 |
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118 idx_vector::idx_vector (const Range& r) |
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119 { |
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120 initialized = 0; |
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121 |
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122 len = r.nelem (); |
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123 |
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191
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124 if (len < 0) |
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125 { |
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126 error ("invalid range used as index"); |
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127 return; |
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128 } |
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129 else if (len == 0) |
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130 { |
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131 data = (int *) 0; |
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132 num_zeros = 0; |
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133 num_ones = 0; |
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134 one_zero = 0; |
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135 initialized = 1; |
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136 return; |
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137 } |
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138 |
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139 double b = r.base (); |
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140 double step = r.inc (); |
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141 |
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142 data = new int [len]; |
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143 |
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144 for (int i = 0; i < len; i++) |
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145 { |
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146 double val = b + i * step; |
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147 data[i] = tree_to_mat_idx (val); |
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148 } |
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149 |
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150 init_state (); |
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151 } |
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152 |
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153 idx_vector& |
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154 idx_vector::operator = (const idx_vector& a) |
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155 { |
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156 if (this != &a) |
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157 { |
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191
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158 initialized = a.initialized; |
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159 |
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160 delete [] data; |
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161 len = a.len; |
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162 data = new int [len]; |
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163 for (int i = 0; i < len; i++) |
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164 data[i] = a.data[i]; |
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165 |
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166 num_zeros = a.num_zeros; |
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167 num_ones = a.num_ones; |
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168 one_zero = a.one_zero; |
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169 |
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170 max_val = a.max_val; |
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171 min_val = a.min_val; |
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172 } |
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173 return *this; |
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174 } |
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175 |
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176 void |
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177 idx_vector::init_state (const char *rc, int z_len = 0) |
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178 { |
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179 one_zero = 1; |
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180 num_zeros = 0; |
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181 num_ones = 0; |
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182 |
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183 min_val = max_val = data[0]; |
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184 |
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185 int i = 0; |
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186 do |
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187 { |
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188 if (data[i] == -1) |
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189 num_zeros++; |
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190 else if (data[i] == 0) |
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191 num_ones++; |
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192 |
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193 if (one_zero && data[i] != -1 && data[i] != 0) |
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194 one_zero = 0; |
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195 |
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196 if (data[i] > max_val) |
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197 max_val = data[i]; |
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198 |
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199 if (data[i] < min_val) |
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200 min_val = data[i]; |
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201 } |
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202 while (++i < len); |
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203 |
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204 if (one_zero && z_len == len) |
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205 { |
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206 if (num_zeros == len) |
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207 { |
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208 delete [] data; |
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209 len = 0; |
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210 data = (int *) 0; |
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211 num_zeros = 0; |
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212 num_ones = 0; |
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213 one_zero = 0; |
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214 } |
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215 else if (num_ones != len || user_pref.prefer_zero_one_indexing) |
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216 convert_one_zero_to_idx (); |
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217 } |
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218 else if (min_val < 0) |
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219 { |
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220 error ("%s index %d out of range", rc, min_val+1); |
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221 initialized = 0; |
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222 return; |
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223 } |
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224 |
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225 initialized = 1; |
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226 } |
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227 |
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228 void |
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229 idx_vector::convert_one_zero_to_idx (void) |
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230 { |
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231 if (num_ones == 0) |
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232 { |
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233 len = 0; |
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234 max_val = 0; |
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235 min_val = 0; |
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236 delete [] data; |
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237 } |
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238 else |
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239 { |
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240 assert (num_ones + num_zeros == len); |
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241 |
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242 int *new_data = new int [num_ones]; |
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243 int count = 0; |
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244 for (int i = 0; i < len; i++) |
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245 if (data[i] == 0) |
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246 new_data[count++] = i; |
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247 |
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248 delete [] data; |
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249 len = num_ones; |
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250 data = new_data; |
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251 |
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252 min_val = max_val = data[0]; |
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253 |
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254 i = 0; |
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255 do |
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256 { |
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257 if (data[i] > max_val) |
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258 max_val = data[i]; |
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259 |
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260 if (data[i] < min_val) |
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261 min_val = data[i]; |
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262 } |
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263 while (++i < len); |
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264 } |
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265 } |
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266 |
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267 static inline int |
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268 intcmp (int *i, int *j) |
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269 { |
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270 return (*i - *j); |
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271 } |
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272 |
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227
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273 int |
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274 idx_vector::checkelem (int n) const |
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275 { |
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276 if (n < 0 || n >= len) |
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277 { |
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278 error ("idx-vector: index out of range"); |
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279 return 0; |
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280 } |
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281 |
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282 return elem (n); |
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283 } |
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284 |
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285 void |
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286 idx_vector::sort (void) |
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287 { |
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288 qsort ((void *) data, len, sizeof (int), |
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289 (int (*)(void*, void*)) intcmp); |
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290 } |
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291 |
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292 ostream& |
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293 operator << (ostream& os, const idx_vector& a) |
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294 { |
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295 for (int i = 0; i < a.len; i++) |
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296 os << a.data[i] << "\n"; |
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297 return os; |
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298 } |
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299 |
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300 /* |
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301 ;;; Local Variables: *** |
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302 ;;; mode: C++ *** |
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303 ;;; page-delimiter: "^/\\*" *** |
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304 ;;; End: *** |
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305 */ |
