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1 /* |
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2 |
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3 Copyright (C) 2004 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 #ifdef HAVE_CONFIG_H |
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24 #include <config.h> |
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25 #endif |
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26 |
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27 #include "str-vec.h" |
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28 #include "quit.h" |
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29 |
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30 #include "defun.h" |
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31 #include "error.h" |
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32 #include "ov.h" |
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33 #include "ov-uint64.h" |
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34 #include "ov-uint32.h" |
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35 #include "ov-uint16.h" |
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36 #include "ov-uint8.h" |
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37 #include "ov-int64.h" |
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38 #include "ov-int32.h" |
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39 #include "ov-int16.h" |
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40 #include "ov-int8.h" |
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41 #include "ov-scalar.h" |
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42 #include "ov-re-mat.h" |
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43 |
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44 // XXX FIXME XXX -- could probably eliminate some code duplication by |
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45 // clever use of templates. |
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46 |
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47 #define BITOPX(OP, FNAME, RET) \ |
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48 { \ |
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49 int nelx = x.numel (); \ |
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50 int nely = y.numel (); \ |
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51 \ |
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52 bool is_scalar_op = (nelx == 1 || nely == 1); \ |
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53 \ |
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54 dim_vector dvx = x.dims (); \ |
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55 dim_vector dvy = y.dims (); \ |
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56 \ |
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57 bool is_array_op = (dvx == dvy); \ |
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58 \ |
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59 if (is_array_op || is_scalar_op) \ |
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60 { \ |
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61 RET result; \ |
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62 \ |
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63 if (nelx != 1) \ |
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64 result.resize (dvx); \ |
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65 else \ |
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66 result.resize (dvy); \ |
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67 \ |
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68 for (int i = 0; i < nelx; i++) \ |
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69 if (is_scalar_op) \ |
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70 for (int k = 0; k < nely; k++) \ |
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71 result(i+k) = x(i) OP y(k); \ |
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72 else \ |
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73 result(i) = x(i) OP y(i); \ |
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74 \ |
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75 retval = result; \ |
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76 } \ |
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77 else \ |
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78 error ("%s: size of x and y must match, or one operand must be a scalar", FNAME); \ |
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79 } |
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80 |
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81 #define BITOP(OP, FNAME) \ |
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82 \ |
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83 octave_value retval; \ |
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84 \ |
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85 int nargin = args.length (); \ |
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86 \ |
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87 if (nargin == 2) \ |
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88 { \ |
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89 if (args(0).type_id () == octave_matrix::static_type_id () \ |
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90 || args(0).type_id () == octave_scalar::static_type_id () \ |
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91 || args(1).type_id () == octave_matrix::static_type_id () \ |
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92 || args(1).type_id () == octave_scalar::static_type_id ()) \ |
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93 { \ |
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94 bool arg0_is_int = true; \ |
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95 bool arg1_is_int = true; \ |
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96 \ |
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97 if (args(0).type_id () == octave_matrix::static_type_id () \ |
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98 || args(0).type_id () == octave_scalar::static_type_id ()) \ |
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99 arg0_is_int = false; \ |
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100 \ |
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101 if (args(1).type_id () == octave_matrix::static_type_id () \ |
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102 || args(1).type_id () == octave_scalar::static_type_id ()) \ |
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103 arg1_is_int = false; \ |
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104 \ |
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105 if (!arg0_is_int && !arg1_is_int) \ |
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106 { \ |
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107 uint64NDArray x (args(0).array_value ()); \ |
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108 uint64NDArray y (args(1).array_value ()); \ |
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109 if (! error_state) \ |
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110 BITOPX (OP, FNAME, uint64NDArray); \ |
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111 retval = retval.array_value (); \ |
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112 } \ |
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113 else \ |
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114 { \ |
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115 int p = (arg0_is_int ? 1 : 0); \ |
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116 int q = (arg0_is_int ? 0 : 1); \ |
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117 \ |
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118 NDArray dx = args(p).array_value (); \ |
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119 \ |
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120 if (args(q).type_id () == octave_uint64_matrix::static_type_id () \ |
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121 || args(q).type_id () == octave_uint64_scalar::static_type_id ()) \ |
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122 { \ |
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123 uint64NDArray x (dx); \ |
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124 uint64NDArray y = args(q).uint64_array_value (); \ |
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125 if (! error_state) \ |
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126 BITOPX (OP, FNAME, uint64NDArray); \ |
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127 } \ |
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128 else if (args(q).type_id () == octave_uint32_matrix::static_type_id () \ |
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129 || args(q).type_id () == octave_uint32_scalar::static_type_id ()) \ |
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130 { \ |
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131 uint32NDArray x (dx); \ |
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132 uint32NDArray y = args(q).uint32_array_value (); \ |
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133 if (! error_state) \ |
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134 BITOPX (OP, FNAME, uint32NDArray); \ |
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135 } \ |
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136 else if (args(q).type_id () == octave_uint16_matrix::static_type_id () \ |
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137 || args(q).type_id () == octave_uint16_scalar::static_type_id ()) \ |
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138 { \ |
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139 uint16NDArray x (dx); \ |
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140 uint16NDArray y = args(q).uint16_array_value (); \ |
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141 if (! error_state) \ |
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142 BITOPX (OP, FNAME, uint16NDArray); \ |
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143 } \ |
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144 else if (args(q).type_id () == octave_uint8_matrix::static_type_id () \ |
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145 || args(q).type_id () == octave_uint8_scalar::static_type_id ()) \ |
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146 { \ |
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147 uint8NDArray x (dx); \ |
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148 uint8NDArray y = args(q).uint8_array_value (); \ |
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149 if (! error_state) \ |
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150 BITOPX (OP, FNAME, uint8NDArray); \ |
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151 } \ |
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152 else if (args(q).type_id () == octave_int64_matrix::static_type_id () \ |
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153 || args(q).type_id () == octave_int64_scalar::static_type_id ()) \ |
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154 { \ |
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155 int64NDArray x (dx); \ |
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156 int64NDArray y = args(q).int64_array_value (); \ |
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157 if (! error_state) \ |
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158 BITOPX (OP, FNAME, int64NDArray); \ |
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159 } \ |
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160 else if (args(q).type_id () == octave_int32_matrix::static_type_id () \ |
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161 || args(q).type_id () == octave_int32_scalar::static_type_id ()) \ |
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162 { \ |
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163 int32NDArray x (dx); \ |
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164 int32NDArray y = args(q).int32_array_value (); \ |
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165 if (! error_state) \ |
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166 BITOPX (OP, FNAME, int32NDArray); \ |
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167 } \ |
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168 else if (args(q).type_id () == octave_int16_matrix::static_type_id () \ |
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169 || args(q).type_id () == octave_int16_scalar::static_type_id ()) \ |
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170 { \ |
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171 int16NDArray x (dx); \ |
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172 int16NDArray y = args(q).int16_array_value (); \ |
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173 if (! error_state) \ |
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174 BITOPX (OP, FNAME, int16NDArray); \ |
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175 } \ |
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176 else if (args(q).type_id () == octave_int8_matrix::static_type_id () \ |
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177 || args(q).type_id () == octave_int8_scalar::static_type_id ()) \ |
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178 { \ |
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179 int8NDArray x (dx); \ |
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180 int8NDArray y = args(q).int8_array_value (); \ |
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181 if (! error_state) \ |
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182 BITOPX (OP, FNAME, int8NDArray); \ |
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183 } \ |
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184 else \ |
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185 error ("%s: invalid operand type", FNAME); \ |
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186 } \ |
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187 } \ |
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188 else if (args(0).type_id () == args(1).type_id ()) \ |
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189 { \ |
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190 if (args(0).type_id () == octave_uint64_matrix::static_type_id () \ |
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191 || args(0).type_id () == octave_uint64_scalar::static_type_id ()) \ |
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192 { \ |
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193 uint64NDArray x = args(0).uint64_array_value (); \ |
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194 uint64NDArray y = args(1).uint64_array_value (); \ |
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195 if (! error_state) \ |
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196 BITOPX (OP, FNAME, uint64NDArray); \ |
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197 } \ |
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198 else if (args(0).type_id () == octave_uint32_matrix::static_type_id () \ |
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199 || args(0).type_id () == octave_uint32_scalar::static_type_id ()) \ |
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200 { \ |
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201 uint32NDArray x = args(0).uint32_array_value (); \ |
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202 uint32NDArray y = args(1).uint32_array_value (); \ |
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203 if (! error_state) \ |
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204 BITOPX (OP, FNAME, uint32NDArray); \ |
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205 } \ |
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206 else if (args(0).type_id () == octave_uint16_matrix::static_type_id () \ |
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207 || args(0).type_id () == octave_uint16_scalar::static_type_id ()) \ |
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208 { \ |
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209 uint16NDArray x = args(0).uint16_array_value (); \ |
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210 uint16NDArray y = args(1).uint16_array_value (); \ |
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211 if (! error_state) \ |
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212 BITOPX (OP, FNAME, uint16NDArray); \ |
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213 } \ |
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214 else if (args(0).type_id () == octave_uint8_matrix::static_type_id () \ |
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215 || args(0).type_id () == octave_uint8_scalar::static_type_id ()) \ |
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216 { \ |
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217 uint8NDArray x = args(0).uint8_array_value (); \ |
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218 uint8NDArray y = args(1).uint8_array_value (); \ |
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219 if (! error_state) \ |
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220 BITOPX (OP, FNAME, uint8NDArray); \ |
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221 } \ |
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222 else if (args(0).type_id () == octave_int64_matrix::static_type_id () \ |
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223 || args(0).type_id () == octave_int64_scalar::static_type_id ()) \ |
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224 { \ |
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225 int64NDArray x = args(0).int64_array_value (); \ |
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226 int64NDArray y = args(1).int64_array_value (); \ |
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227 if (! error_state) \ |
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228 BITOPX (OP, FNAME, int64NDArray); \ |
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229 } \ |
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230 else if (args(0).type_id () == octave_int32_matrix::static_type_id () \ |
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231 || args(0).type_id () == octave_int32_scalar::static_type_id ()) \ |
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232 { \ |
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233 int32NDArray x = args(0).int32_array_value (); \ |
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234 int32NDArray y = args(1).int32_array_value (); \ |
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235 if (! error_state) \ |
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236 BITOPX (OP, FNAME, int32NDArray); \ |
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237 } \ |
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238 else if (args(0).type_id () == octave_int16_matrix::static_type_id () \ |
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239 || args(0).type_id () == octave_int16_scalar::static_type_id ()) \ |
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240 { \ |
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241 int16NDArray x = args(0).int16_array_value (); \ |
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242 int16NDArray y = args(1).int16_array_value (); \ |
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243 if (! error_state) \ |
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244 BITOPX (OP, FNAME, int16NDArray); \ |
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245 } \ |
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246 else if (args(0).type_id () == octave_int8_matrix::static_type_id () \ |
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247 || args(0).type_id () == octave_int8_scalar::static_type_id ()) \ |
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248 { \ |
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249 int8NDArray x = args(0).int8_array_value (); \ |
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250 int8NDArray y = args(1).int8_array_value (); \ |
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251 if (! error_state) \ |
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252 BITOPX (OP, FNAME, int8NDArray); \ |
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253 } \ |
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254 else \ |
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255 error ("%s: invalid operand type", FNAME); \ |
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256 } \ |
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257 else \ |
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258 error ("%s: must have matching operand types", FNAME); \ |
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259 } \ |
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260 else \ |
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261 print_usage (FNAME); \ |
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262 \ |
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263 return retval |
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264 |
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265 DEFUN (bitand, args, , |
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266 "-*- texinfo -*-\n\ |
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267 @deftypefn {Built-in Function} {} bitand (@var{x}, @var{y})\n\ |
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268 Return the bitwise AND of nonnegative integers.\n\ |
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269 @var{x}, @var{y} must be in range [0..bitmax]\n\ |
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270 @end deftypefn\n\ |
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271 @seealso{bitor, bitxor, bitset, bitget, bitcmp, bitshift, bitmax}") |
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272 { |
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273 BITOP (&, "bitand"); |
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274 } |
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275 |
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276 DEFUN (bitor, args, , |
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277 "-*- texinfo -*-\n\ |
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278 @deftypefn {Built-in Function} {} bitor (@var{x}, @var{y})\n\ |
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279 Return the bitwise OR of nonnegative integers.\n\ |
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280 @var{x}, @var{y} must be in range [0..bitmax]\n\ |
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281 @end deftypefn\n\ |
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282 @seealso{bitor, bitxor, bitset, bitget, bitcmp, bitshift, bitmax}") |
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283 { |
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284 BITOP (|, "bitor"); |
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285 } |
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286 |
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287 DEFUN (bitxor, args, , |
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288 "-*- texinfo -*-\n\ |
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289 @deftypefn {Built-in Function} {} bitxor (@var{x}, @var{y})\n\ |
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290 Return the bitwise XOR of nonnegative integers.\n\ |
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291 @var{x}, @var{y} must be in range [0..bitmax]\n\ |
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292 @end deftypefn\n\ |
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293 @seealso{bitand, bitor, bitset, bitget, bitcmp, bitshift, bitmax}") |
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294 { |
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295 BITOP (^, "bitxor"); |
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296 } |
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297 |
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298 static EIGHT_BYTE_INT |
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299 bitshift (double a, int n, EIGHT_BYTE_INT mask) |
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300 { |
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301 if (n > 0) |
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302 return (static_cast<EIGHT_BYTE_INT> (a) << n) & mask; |
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303 else if (n < 0) |
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304 return (static_cast<EIGHT_BYTE_INT> (a) >> -n) & mask; |
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305 else |
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306 return static_cast<EIGHT_BYTE_INT> (a) & mask; |
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307 } |
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308 |
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309 // Note that the bitshift operators are undefined if shifted by more |
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310 // bits than in the type, so we need to test for the size of the |
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311 // shift. |
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312 |
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313 #define DO_BITSHIFT(T) \ |
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314 if (! error_state) \ |
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315 { \ |
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316 double d1, d2; \ |
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317 \ |
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318 if (n.all_integers (d1, d2)) \ |
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319 { \ |
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320 int m_nel = m.numel (); \ |
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321 int n_nel = n.numel (); \ |
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322 \ |
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323 bool is_scalar_op = (m_nel == 1 || n_nel == 1); \ |
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324 \ |
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325 dim_vector m_dv = m.dims (); \ |
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326 dim_vector n_dv = n.dims (); \ |
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327 \ |
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328 bool is_array_op = (m_dv == n_dv); \ |
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329 \ |
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330 if (is_array_op || is_scalar_op) \ |
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331 { \ |
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332 T ## NDArray result; \ |
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333 \ |
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334 if (m_nel != 1) \ |
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335 result.resize (m_dv); \ |
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336 else \ |
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337 result.resize (n_dv); \ |
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338 \ |
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339 for (int i = 0; i < m_nel; i++) \ |
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340 if (is_scalar_op) \ |
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341 for (int k = 0; k < n_nel; k++) \ |
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342 if (static_cast<int> (n(k)) >= bits_in_type) \ |
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343 result(i+k) = 0; \ |
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344 else \ |
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345 result(i+k) = bitshift (m(i), static_cast<int> (n(k)), mask); \ |
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346 else \ |
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347 if (static_cast<int> (n(i)) >= bits_in_type) \ |
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348 result(i) = 0; \ |
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349 else \ |
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350 result(i) = bitshift (m(i), static_cast<int> (n(i)), mask); \ |
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351 \ |
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352 retval = result; \ |
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353 } \ |
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354 else \ |
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355 error ("bitshift: size of A and N must match, or one operand must be a scalar"); \ |
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356 } \ |
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357 else \ |
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358 error ("bitshift: expecting second argument to be integer"); \ |
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359 } |
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360 |
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361 #define DO_UBITSHIFT(T, N) \ |
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362 do \ |
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363 { \ |
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364 int bits_in_type = octave_ ## T :: nbits (); \ |
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365 T ## NDArray m = m_arg.T ## _array_value (); \ |
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366 octave_ ## T mask = ~0ULL; \ |
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367 if ((N) < bits_in_type) \ |
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368 mask = bitshift (mask, (N) - bits_in_type); \ |
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369 else if ((N) < 1) \ |
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370 mask = 0; \ |
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371 DO_BITSHIFT (T); \ |
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372 } \ |
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4915
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373 while (0) |
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374 |
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4919
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375 #define DO_SBITSHIFT(T, N) \ |
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376 do \ |
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377 { \ |
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378 int bits_in_type = octave_ ## T :: nbits (); \ |
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4919
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379 T ## NDArray m = m_arg.T ## _array_value (); \ |
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380 octave_ ## T mask = -1; \ |
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4920
|
381 if ((N) < bits_in_type) \ |
|
|
382 mask = bitshift (mask, (N) - bits_in_type); \ |
|
4919
|
383 else if ((N) < 1) \ |
|
|
384 mask = 0; \ |
|
|
385 DO_BITSHIFT (T); \ |
|
|
386 } \ |
|
4908
|
387 while (0) |
|
|
388 |
|
|
389 DEFUN (bitshift, args, , |
|
|
390 "-*- texinfo -*-\n\ |
|
|
391 @deftypefn {Function File} {} bitshift (@var{a}, @var{k})\n\ |
|
|
392 @deftypefnx {Function File} {} bitshift (@var{a}, @var{k}, @var{n})\n\ |
|
4920
|
393 Return a @var{k} bit shift of @var{n}- digit unsigned\n\ |
|
|
394 integers in @var{a}. A positive @var{k} leads to a left shift.\n\ |
|
|
395 A negative value to a right shift. If @var{n} is omitted it defaults\n\ |
|
|
396 to log2(bitmax)+1.\n\ |
|
4915
|
397 @var{n} must be in range [1,log2(bitmax)+1] usually [1,33]\n\ |
|
4908
|
398 \n\ |
|
|
399 @example\n\ |
|
|
400 bitshift (eye (3), 1))\n\ |
|
|
401 @result{}\n\ |
|
|
402 @group\n\ |
|
|
403 2 0 0\n\ |
|
|
404 0 2 0\n\ |
|
|
405 0 0 2\n\ |
|
|
406 @end group\n\ |
|
|
407 \n\ |
|
|
408 bitshift (10, [-2, -1, 0, 1, 2])\n\ |
|
|
409 @result{} 2 5 10 20 40\n\ |
|
|
410 \n\ |
|
|
411 bitshift ([1, 10], 2, [3,4])\n\ |
|
|
412 @result{} 4 8\n\ |
|
|
413 @end example\n\ |
|
|
414 @end deftypefn\n\ |
|
|
415 @seealso{bitand, bitor, bitxor, bitset, bitget, bitcmp, bitmax}") |
|
|
416 { |
|
|
417 octave_value retval; |
|
|
418 |
|
|
419 int nargin = args.length (); |
|
|
420 |
|
4915
|
421 if (nargin == 2 || nargin == 3) |
|
4908
|
422 { |
|
4915
|
423 int nbits = 64; |
|
|
424 |
|
4920
|
425 NDArray n = args(1).array_value (); |
|
|
426 |
|
|
427 if (error_state) |
|
|
428 error ("bitshift: expecting integer as second argument"); |
|
|
429 else |
|
4915
|
430 { |
|
4920
|
431 if (nargin == 3) |
|
|
432 { |
|
|
433 nbits = args(2).int_value (); |
|
4915
|
434 |
|
4920
|
435 if (error_state) |
|
|
436 error ("bitshift: expecting integer as third argument"); |
|
|
437 else if (nbits < 0) |
|
|
438 error ("bitshift: number of bits to mask must be positive"); |
|
|
439 } |
|
4915
|
440 } |
|
|
441 |
|
|
442 if (error_state) |
|
|
443 return retval; |
|
4908
|
444 |
|
|
445 octave_value m_arg = args(0); |
|
|
446 std::string cname = m_arg.class_name (); |
|
|
447 |
|
|
448 if (cname == "uint8") |
|
4915
|
449 DO_UBITSHIFT (uint8, nbits < 8 ? nbits : 8); |
|
4908
|
450 else if (cname == "uint16") |
|
4915
|
451 DO_UBITSHIFT (uint16, nbits < 16 ? nbits : 16); |
|
4908
|
452 else if (cname == "uint32") |
|
4915
|
453 DO_UBITSHIFT (uint32, nbits < 32 ? nbits : 32); |
|
4908
|
454 else if (cname == "uint64") |
|
4915
|
455 DO_UBITSHIFT (uint64, nbits < 64 ? nbits : 64); |
|
|
456 else if (cname == "int8") |
|
|
457 DO_SBITSHIFT (int8, nbits < 8 ? nbits : 8); |
|
|
458 else if (cname == "int16") |
|
|
459 DO_SBITSHIFT (int16, nbits < 16 ? nbits : 16); |
|
|
460 else if (cname == "int32") |
|
|
461 DO_SBITSHIFT (int32, nbits < 32 ? nbits : 32); |
|
|
462 else if (cname == "int64") |
|
|
463 DO_SBITSHIFT (int64, nbits < 64 ? nbits : 64); |
|
|
464 else if (cname == "double") |
|
|
465 { |
|
|
466 nbits = (nbits < 53 ? nbits : 53); |
|
|
467 EIGHT_BYTE_INT mask = 0x1FFFFFFFFFFFFFLL; |
|
|
468 if (nbits < 53) |
|
|
469 mask = mask >> (53 - nbits); |
|
|
470 else if (nbits < 1) |
|
|
471 mask = 0; |
|
|
472 int bits_in_type = 64; |
|
|
473 NDArray m = m_arg.array_value (); |
|
|
474 DO_BITSHIFT ( ); |
|
|
475 } |
|
4908
|
476 else |
|
|
477 error ("bitshift: not defined for %s objects", cname.c_str ()); |
|
|
478 } |
|
|
479 else |
|
|
480 print_usage ("bitshift"); |
|
|
481 |
|
|
482 return retval; |
|
|
483 } |
|
|
484 |
|
|
485 DEFUN (bitmax, args, , |
|
|
486 "-*- texinfo -*-\n\ |
|
4915
|
487 @deftypefn {Built-in Function} {} bitmax ()\n\ |
|
4920
|
488 Return the largest integer that can be represented as a floating point\n\ |
|
|
489 value. On IEEE-754 compatiable systems, @code{bitmax} is @code{2^53 - 1}.\n\ |
|
4915
|
490 @end deftypefn") |
|
|
491 { |
|
|
492 octave_value retval; |
|
4919
|
493 if (args.length () != 0) |
|
4915
|
494 print_usage ("bitmax"); |
|
|
495 else |
|
4919
|
496 retval = (static_cast<double> (0x1FFFFFFFFFFFFFLL)); |
|
4915
|
497 return retval; |
|
|
498 } |
|
|
499 |
|
|
500 DEFUN (intmax, args, , |
|
|
501 "-*- texinfo -*-\n\ |
|
|
502 @deftypefn {Built-in Function} {} intmax (@var{type})\n\ |
|
4908
|
503 @end deftypefn") |
|
|
504 { |
|
|
505 octave_value retval; |
|
4915
|
506 std::string cname = "int32"; |
|
|
507 int nargin = args.length (); |
|
|
508 |
|
4919
|
509 if (nargin == 1 && args(0).is_string ()) |
|
4915
|
510 cname = args(0).string_value (); |
|
|
511 else if (nargin != 0) |
|
|
512 { |
|
|
513 print_usage ("intmax"); |
|
|
514 return retval; |
|
|
515 } |
|
|
516 |
|
|
517 if (cname == "uint8") |
|
4919
|
518 retval = octave_uint8 (std::numeric_limits<octave_uint8_t>::max ()); |
|
4915
|
519 else if (cname == "uint16") |
|
4919
|
520 retval = octave_uint16 (std::numeric_limits<octave_uint16_t>::max ()); |
|
4915
|
521 else if (cname == "uint32") |
|
4919
|
522 retval = octave_uint32 (std::numeric_limits<octave_uint32_t>::max ()); |
|
4915
|
523 else if (cname == "uint64") |
|
4919
|
524 retval = octave_uint64 (std::numeric_limits<octave_uint64_t>::max ()); |
|
4915
|
525 else if (cname == "int8") |
|
4919
|
526 retval = octave_int8 (std::numeric_limits<octave_int8_t>::max ()); |
|
4915
|
527 else if (cname == "int16") |
|
4919
|
528 retval = octave_int16 (std::numeric_limits<octave_int16_t>::max ()); |
|
4915
|
529 else if (cname == "int32") |
|
4919
|
530 retval = octave_int32 (std::numeric_limits<octave_int32_t>::max ()); |
|
4915
|
531 else if (cname == "int64") |
|
4919
|
532 retval = octave_int64 (std::numeric_limits<octave_int64_t>::max ()); |
|
4915
|
533 else |
|
|
534 error ("intmax: not defined for '%s' objects", cname.c_str ()); |
|
|
535 |
|
|
536 return retval; |
|
|
537 } |
|
|
538 |
|
|
539 DEFUN (intmin, args, , |
|
|
540 "-*- texinfo -*-\n\ |
|
|
541 @deftypefn {Built-in Function} {} intmin (@var{type})\n\ |
|
|
542 @end deftypefn") |
|
|
543 { |
|
|
544 octave_value retval; |
|
|
545 std::string cname = "int32"; |
|
|
546 int nargin = args.length (); |
|
|
547 |
|
4919
|
548 if (nargin == 1 && args(0).is_string ()) |
|
4915
|
549 cname = args(0).string_value (); |
|
|
550 else if (nargin != 0) |
|
|
551 { |
|
|
552 print_usage ("intmin"); |
|
|
553 return retval; |
|
|
554 } |
|
|
555 |
|
|
556 if (cname == "uint8") |
|
4919
|
557 retval = octave_uint8 (std::numeric_limits<octave_uint8_t>::min ()); |
|
4915
|
558 else if (cname == "uint16") |
|
|
559 retval = octave_uint16 (std::numeric_limits<octave_uint16_t>::min()); |
|
|
560 else if (cname == "uint32") |
|
4919
|
561 retval = octave_uint32 (std::numeric_limits<octave_uint32_t>::min ()); |
|
4915
|
562 else if (cname == "uint64") |
|
4919
|
563 retval = octave_uint64 (std::numeric_limits<octave_uint64_t>::min ()); |
|
4915
|
564 else if (cname == "int8") |
|
4919
|
565 retval = octave_int8 (std::numeric_limits<octave_int8_t>::min ()); |
|
4915
|
566 else if (cname == "int16") |
|
4919
|
567 retval = octave_int16 (std::numeric_limits<octave_int16_t>::min ()); |
|
4915
|
568 else if (cname == "int32") |
|
4919
|
569 retval = octave_int32 (std::numeric_limits<octave_int32_t>::min ()); |
|
4915
|
570 else if (cname == "int64") |
|
4919
|
571 retval = octave_int64 (std::numeric_limits<octave_int64_t>::min ()); |
|
4915
|
572 else |
|
|
573 error ("intmin: not defined for '%s' objects", cname.c_str ()); |
|
|
574 |
|
4908
|
575 return retval; |
|
|
576 } |
|
|
577 |
|
|
578 /* |
|
|
579 ;;; Local Variables: *** |
|
|
580 ;;; mode: C++ *** |
|
|
581 ;;; End: *** |
|
|
582 */ |
