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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 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 (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) |
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24 #pragma implementation |
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25 #endif |
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26 |
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27 #ifdef HAVE_CONFIG_H |
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28 #include <config.h> |
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29 #endif |
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30 |
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31 #include <iostream> |
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32 |
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33 #include "defun.h" |
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34 #include "gripes.h" |
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35 #include "oct-obj.h" |
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36 #include "ov-scalar.h" |
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37 #include "ov-base.h" |
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38 #include "ov-base-scalar.h" |
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39 #include "ov-base-scalar.cc" |
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40 #include "ov-re-mat.h" |
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41 #include "ov-typeinfo.h" |
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42 #include "pr-output.h" |
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43 #include "xdiv.h" |
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44 #include "xpow.h" |
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45 |
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46 #include "ls-oct-ascii.h" |
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47 #include "ls-hdf5.h" |
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48 |
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49 template class octave_base_scalar<double>; |
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50 |
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51 DEFINE_OCTAVE_ALLOCATOR (octave_scalar); |
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52 |
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53 DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_scalar, "scalar", "double"); |
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54 |
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55 octave_value |
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56 octave_scalar::do_index_op (const octave_value_list& idx, int resize_ok) |
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57 { |
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58 octave_value retval; |
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59 |
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60 if (idx.valid_scalar_indices ()) |
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61 retval = scalar; |
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62 else |
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63 { |
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64 // XXX FIXME XXX -- this doesn't solve the problem of |
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65 // |
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66 // a = 1; a([1,1], [1,1], [1,1]) |
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67 // |
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68 // and similar constructions. Hmm... |
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69 |
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70 // XXX FIXME XXX -- using this constructor avoids narrowing the |
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71 // 1x1 matrix back to a scalar value. Need a better solution |
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72 // to this problem. |
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73 |
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74 octave_value tmp (new octave_matrix (matrix_value ())); |
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75 |
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76 retval = tmp.do_index_op (idx, resize_ok); |
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77 } |
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78 |
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79 return retval; |
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80 } |
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81 |
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82 std::streamoff |
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83 octave_scalar::streamoff_value (void) const |
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84 { |
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85 std::streamoff retval (-1); |
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86 |
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87 if (D_NINT (scalar) == scalar) |
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88 retval = std::streamoff (static_cast<long> (scalar)); |
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89 else |
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90 error ("conversion to streamoff value failed"); |
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91 |
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92 return retval; |
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93 } |
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94 |
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95 octave_value |
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96 octave_scalar::convert_to_str_internal (bool, bool) const |
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97 { |
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98 octave_value retval; |
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99 |
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100 if (xisnan (scalar)) |
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101 ::error ("invalid conversion from NaN to character"); |
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102 else |
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103 { |
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104 int ival = NINT (scalar); |
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105 |
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106 if (ival < 0 || ival > UCHAR_MAX) |
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107 { |
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108 // XXX FIXME XXX -- is there something better we could do? |
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109 |
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110 ival = 0; |
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111 |
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112 ::warning ("range error for conversion to character value"); |
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113 } |
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114 |
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115 retval = octave_value (std::string (1, static_cast<char> (ival))); |
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116 } |
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117 |
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118 return retval; |
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119 } |
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120 |
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121 bool |
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122 octave_scalar::save_ascii (std::ostream& os, bool& infnan_warned, |
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123 bool strip_nan_and_inf) |
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124 { |
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125 double d = double_value (); |
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126 |
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127 if (strip_nan_and_inf) |
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128 { |
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129 if (xisnan (d)) |
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130 { |
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131 error ("only value to plot is NaN"); |
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132 return false; |
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133 } |
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134 else |
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135 { |
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136 d = xisinf (d) ? (d > 0 ? OCT_RBV : -OCT_RBV) : d; |
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137 octave_write_double (os, d); |
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138 os << "\n"; |
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139 } |
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140 } |
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141 else |
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142 { |
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143 if (! infnan_warned && (xisnan (d) || xisinf (d))) |
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144 { |
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145 warning ("save: Inf or NaN values may not be reloadable"); |
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146 infnan_warned = true; |
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147 } |
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148 |
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149 octave_write_double (os, d); |
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150 os << "\n"; |
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151 } |
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152 |
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153 return true; |
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154 } |
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155 |
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156 bool |
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157 octave_scalar::load_ascii (std::istream& is) |
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158 { |
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159 scalar = octave_read_double (is); |
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160 if (!is) |
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161 { |
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162 error ("load: failed to load scalar constant"); |
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163 return false; |
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164 } |
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165 |
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166 return true; |
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167 } |
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168 |
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169 bool |
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170 octave_scalar::save_binary (std::ostream& os, bool& /* save_as_floats */) |
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171 { |
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172 char tmp = (char) LS_DOUBLE; |
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173 os.write (X_CAST (char *, &tmp), 1); |
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174 double dtmp = double_value (); |
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175 os.write (X_CAST (char *, &dtmp), 8); |
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176 |
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177 return true; |
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178 } |
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179 |
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180 bool |
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181 octave_scalar::load_binary (std::istream& is, bool swap, |
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182 oct_mach_info::float_format fmt) |
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183 { |
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184 char tmp; |
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185 if (! is.read (X_CAST (char *, &tmp), 1)) |
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186 return false; |
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187 |
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188 double dtmp; |
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189 read_doubles (is, &dtmp, X_CAST (save_type, tmp), 1, swap, fmt); |
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190 if (error_state || ! is) |
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191 return false; |
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192 |
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193 scalar = dtmp; |
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194 return true; |
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195 } |
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196 |
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197 #if defined (HAVE_HDF5) |
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198 bool |
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199 octave_scalar::save_hdf5 (hid_t loc_id, const char *name, |
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200 bool /* save_as_floats */) |
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201 { |
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202 hsize_t dimens[3]; |
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203 hid_t space_hid = -1, data_hid = -1; |
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204 bool retval = true; |
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205 |
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206 space_hid = H5Screate_simple (0, dimens, (hsize_t*) 0); |
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207 if (space_hid < 0) return false; |
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208 |
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209 data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_DOUBLE, space_hid, |
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210 H5P_DEFAULT); |
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211 if (data_hid < 0) |
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212 { |
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213 H5Sclose (space_hid); |
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214 return false; |
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215 } |
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216 |
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217 double tmp = double_value (); |
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218 retval = H5Dwrite (data_hid, H5T_NATIVE_DOUBLE, H5S_ALL, H5S_ALL, |
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219 H5P_DEFAULT, (void*) &tmp) >= 0; |
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220 |
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221 H5Dclose (data_hid); |
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222 H5Sclose (space_hid); |
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223 return retval; |
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224 } |
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225 |
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226 bool |
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227 octave_scalar::load_hdf5 (hid_t loc_id, const char *name, |
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228 bool /* have_h5giterate_bug */) |
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229 { |
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230 hid_t data_hid = H5Dopen (loc_id, name); |
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231 hid_t space_id = H5Dget_space (data_hid); |
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232 |
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233 hsize_t rank = H5Sget_simple_extent_ndims (space_id); |
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234 |
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235 if (rank != 0) |
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236 { |
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237 H5Dclose (data_hid); |
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238 return false; |
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239 } |
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240 |
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241 double dtmp; |
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242 if (H5Dread (data_hid, H5T_NATIVE_DOUBLE, H5S_ALL, H5S_ALL, |
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243 H5P_DEFAULT, (void *) &dtmp) < 0) |
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244 { |
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245 H5Dclose (data_hid); |
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246 return false; |
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247 } |
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248 |
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249 scalar = dtmp; |
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250 H5Dclose (data_hid); |
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251 return true; |
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252 } |
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253 #endif |
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254 |
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255 /* |
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256 ;;; Local Variables: *** |
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257 ;;; mode: C++ *** |
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258 ;;; End: *** |
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259 */ |
