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1 // data-conv.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1996 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 */ |
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23 |
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24 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include <iostream.h> |
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29 |
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30 #include "byte-swap.h" |
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31 #include "data-conv.h" |
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32 #include "lo-error.h" |
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33 |
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34 #define swap_1_bytes(x, y) |
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35 |
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36 #define LS_DO_READ(TYPE,swap,data,size,len,stream) \ |
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37 do \ |
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38 { \ |
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39 volatile TYPE *ptr = (TYPE *) data; \ |
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40 stream.read ((TYPE *) ptr, size * len); \ |
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41 if (swap) \ |
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42 swap_ ## size ## _bytes ((char *) ptr, len); \ |
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43 TYPE tmp = ptr[0]; \ |
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44 for (int i = len - 1; i > 0; i--) \ |
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45 data[i] = ptr[i]; \ |
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46 data[0] = tmp; \ |
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47 } \ |
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48 while (0) |
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49 |
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50 // Have to use copy here to avoid writing over data accessed via |
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51 // Matrix::data(). |
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52 |
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53 #define LS_DO_WRITE(TYPE,data,size,len,stream) \ |
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54 do \ |
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55 { \ |
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56 char tmp_type = (char) type; \ |
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57 stream.write (&tmp_type, 1); \ |
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58 TYPE *ptr = new TYPE [len]; \ |
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59 for (int i = 0; i < len; i++) \ |
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60 ptr[i] = (TYPE) data[i]; \ |
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61 stream.write ((TYPE *) ptr, size * len); \ |
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62 delete [] ptr ; \ |
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63 } \ |
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64 while (0) |
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65 |
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66 // Loading variables from files. |
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67 |
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68 static void |
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69 gripe_unrecognized_float_fmt (void) |
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70 { |
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71 (*current_liboctave_error_handler) |
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72 ("unrecognized floating point format requested"); |
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73 } |
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74 |
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75 static void |
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76 gripe_data_conversion (const char *from, const char *to) |
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77 { |
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78 (*current_liboctave_error_handler) |
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79 ("unable to convert from %s to %s format", from, to); |
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80 } |
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81 |
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82 // But first, some data conversion routines. |
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83 |
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84 // Currently, we only handle conversions for the IEEE types. To fix |
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85 // that, make more of the following routines work. |
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86 |
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87 // XXX FIXME XXX -- assumes sizeof (Complex) == 8 |
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88 // XXX FIXME XXX -- assumes sizeof (double) == 8 |
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89 // XXX FIXME XXX -- assumes sizeof (float) == 4 |
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90 |
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91 static void |
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92 IEEE_big_double_to_IEEE_little_double (double *d, int len) |
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93 { |
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94 swap_8_bytes ((char *) d, len); |
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95 } |
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96 |
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97 static void |
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98 VAX_D_double_to_IEEE_little_double (double * /* d */, int /* len */) |
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99 { |
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100 gripe_data_conversion ("VAX D float", "IEEE little endian format"); |
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101 } |
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102 |
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103 static void |
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104 VAX_G_double_to_IEEE_little_double (double * /* d */, int /* len */) |
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105 { |
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106 gripe_data_conversion ("VAX G float", "IEEE little endian format"); |
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107 } |
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108 |
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109 static void |
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110 Cray_to_IEEE_little_double (double * /* d */, int /* len */) |
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111 { |
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112 gripe_data_conversion ("Cray", "IEEE little endian format"); |
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113 } |
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114 |
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115 static void |
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116 IEEE_big_float_to_IEEE_little_float (float *d, int len) |
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117 { |
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118 swap_4_bytes ((char *) d, len); |
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119 } |
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120 |
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121 static void |
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122 VAX_D_float_to_IEEE_little_float (float * /* d */, int /* len */) |
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123 { |
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124 gripe_data_conversion ("VAX D float", "IEEE little endian format"); |
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125 } |
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126 |
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127 static void |
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128 VAX_G_float_to_IEEE_little_float (float * /* d */, int /* len */) |
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129 { |
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130 gripe_data_conversion ("VAX G float", "IEEE little endian format"); |
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131 } |
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132 |
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133 static void |
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134 Cray_to_IEEE_little_float (float * /* d */, int /* len */) |
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135 { |
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136 gripe_data_conversion ("Cray", "IEEE little endian format"); |
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137 } |
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138 |
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139 static void |
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140 IEEE_little_double_to_IEEE_big_double (double *d, int len) |
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141 { |
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142 swap_8_bytes ((char *) d, len); |
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143 } |
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144 |
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145 static void |
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146 VAX_D_double_to_IEEE_big_double (double * /* d */, int /* len */) |
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147 { |
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148 gripe_data_conversion ("VAX D float", "IEEE big endian format"); |
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149 } |
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150 |
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151 static void |
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152 VAX_G_double_to_IEEE_big_double (double * /* d */, int /* len */) |
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153 { |
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154 gripe_data_conversion ("VAX G float", "IEEE big endian format"); |
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155 } |
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156 |
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157 static void |
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158 Cray_to_IEEE_big_double (double * /* d */, int /* len */) |
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159 { |
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160 gripe_data_conversion ("Cray", "IEEE big endian format"); |
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161 } |
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162 |
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163 static void |
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164 IEEE_little_float_to_IEEE_big_float (float *d, int len) |
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165 { |
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166 swap_4_bytes ((char *) d, len); |
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167 } |
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168 |
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169 static void |
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170 VAX_D_float_to_IEEE_big_float (float * /* d */, int /* len */) |
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171 { |
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172 gripe_data_conversion ("VAX D float", "IEEE big endian format"); |
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173 } |
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174 |
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175 static void |
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176 VAX_G_float_to_IEEE_big_float (float * /* d */, int /* len */) |
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177 { |
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178 gripe_data_conversion ("VAX G float", "IEEE big endian format"); |
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179 } |
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180 |
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181 static void |
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182 Cray_to_IEEE_big_float (float * /* d */, int /* len */) |
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183 { |
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184 gripe_data_conversion ("Cray", "IEEE big endian format"); |
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185 } |
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186 |
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187 static void |
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188 IEEE_little_double_to_VAX_D_double (double * /* d */, int /* len */) |
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189 { |
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190 gripe_data_conversion ("IEEE little endian", "VAX D"); |
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191 } |
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192 |
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193 static void |
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194 IEEE_big_double_to_VAX_D_double (double * /* d */, int /* len */) |
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195 { |
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196 gripe_data_conversion ("IEEE big endian", "VAX D"); |
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197 } |
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198 |
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199 static void |
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200 VAX_G_double_to_VAX_D_double (double * /* d */, int /* len */) |
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201 { |
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202 gripe_data_conversion ("VAX G float", "VAX D"); |
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203 } |
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204 |
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205 static void |
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206 Cray_to_VAX_D_double (double * /* d */, int /* len */) |
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207 { |
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208 gripe_data_conversion ("Cray", "VAX D"); |
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209 } |
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210 |
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211 static void |
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212 IEEE_little_float_to_VAX_D_float (float * /* d */, int /* len */) |
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213 { |
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214 gripe_data_conversion ("IEEE little endian", "VAX D"); |
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215 } |
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216 |
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217 static void |
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218 IEEE_big_float_to_VAX_D_float (float * /* d */, int /* len */) |
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219 { |
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220 gripe_data_conversion ("IEEE big endian", "VAX D"); |
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221 } |
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222 |
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223 static void |
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224 VAX_G_float_to_VAX_D_float (float * /* d */, int /* len */) |
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225 { |
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226 gripe_data_conversion ("VAX G float", "VAX D"); |
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227 } |
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228 |
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229 static void |
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230 Cray_to_VAX_D_float (float * /* d */, int /* len */) |
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231 { |
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232 gripe_data_conversion ("Cray", "VAX D"); |
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233 } |
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234 |
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235 static void |
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236 IEEE_little_double_to_VAX_G_double (double * /* d */, int /* len */) |
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237 { |
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238 gripe_data_conversion ("IEEE little endian", "VAX G"); |
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239 } |
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240 |
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241 static void |
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242 IEEE_big_double_to_VAX_G_double (double * /* d */, int /* len */) |
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243 { |
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244 gripe_data_conversion ("IEEE big endian", "VAX G"); |
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245 } |
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246 |
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247 static void |
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248 VAX_D_double_to_VAX_G_double (double * /* d */, int /* len */) |
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249 { |
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250 gripe_data_conversion ("VAX D float", "VAX G"); |
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251 } |
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252 |
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253 static void |
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254 Cray_to_VAX_G_double (double * /* d */, int /* len */) |
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255 { |
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256 gripe_data_conversion ("VAX G float", "VAX G"); |
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257 } |
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258 |
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259 static void |
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260 IEEE_little_float_to_VAX_G_float (float * /* d */, int /* len */) |
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261 { |
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262 gripe_data_conversion ("IEEE little endian", "VAX G"); |
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263 } |
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264 |
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265 static void |
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266 IEEE_big_float_to_VAX_G_float (float * /* d */, int /* len */) |
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267 { |
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268 gripe_data_conversion ("IEEE big endian", "VAX G"); |
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269 } |
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270 |
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271 static void |
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272 VAX_D_float_to_VAX_G_float (float * /* d */, int /* len */) |
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273 { |
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274 gripe_data_conversion ("VAX D float", "VAX G"); |
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275 } |
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276 |
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277 static void |
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278 Cray_to_VAX_G_float (float * /* d */, int /* len */) |
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279 { |
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280 gripe_data_conversion ("VAX G float", "VAX G"); |
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281 } |
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282 |
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283 void |
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284 do_double_format_conversion (double *data, int len, |
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285 floating_point_format fmt) |
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286 { |
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287 switch (native_float_format) |
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288 { |
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289 case OCTAVE_IEEE_LITTLE: |
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290 switch (fmt) |
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291 { |
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292 case OCTAVE_IEEE_LITTLE: |
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293 break; |
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294 |
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295 case OCTAVE_IEEE_BIG: |
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296 IEEE_big_double_to_IEEE_little_double (data, len); |
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297 break; |
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298 |
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299 case OCTAVE_VAX_D: |
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300 VAX_D_double_to_IEEE_little_double (data, len); |
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301 break; |
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302 |
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303 case OCTAVE_VAX_G: |
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304 VAX_G_double_to_IEEE_little_double (data, len); |
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305 break; |
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306 |
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307 case OCTAVE_CRAY: |
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308 Cray_to_IEEE_little_double (data, len); |
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309 break; |
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310 |
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311 default: |
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312 gripe_unrecognized_float_fmt (); |
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313 break; |
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314 } |
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315 break; |
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316 |
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317 case OCTAVE_IEEE_BIG: |
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318 switch (fmt) |
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319 { |
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320 case OCTAVE_IEEE_LITTLE: |
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321 IEEE_little_double_to_IEEE_big_double (data, len); |
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322 break; |
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323 |
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324 case OCTAVE_IEEE_BIG: |
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325 break; |
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326 |
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327 case OCTAVE_VAX_D: |
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328 VAX_D_double_to_IEEE_big_double (data, len); |
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329 break; |
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330 |
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331 case OCTAVE_VAX_G: |
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332 VAX_G_double_to_IEEE_big_double (data, len); |
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333 break; |
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334 |
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335 case OCTAVE_CRAY: |
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336 Cray_to_IEEE_big_double (data, len); |
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337 break; |
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338 |
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339 default: |
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340 gripe_unrecognized_float_fmt (); |
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341 break; |
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342 } |
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343 break; |
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344 |
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345 case OCTAVE_VAX_D: |
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346 switch (fmt) |
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347 { |
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348 case OCTAVE_IEEE_LITTLE: |
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349 IEEE_little_double_to_VAX_D_double (data, len); |
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350 break; |
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351 |
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352 case OCTAVE_IEEE_BIG: |
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353 IEEE_big_double_to_VAX_D_double (data, len); |
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354 break; |
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355 |
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356 case OCTAVE_VAX_D: |
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357 break; |
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358 |
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359 case OCTAVE_VAX_G: |
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360 VAX_G_double_to_VAX_D_double (data, len); |
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361 break; |
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362 |
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363 case OCTAVE_CRAY: |
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364 Cray_to_VAX_D_double (data, len); |
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365 break; |
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366 |
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367 default: |
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368 gripe_unrecognized_float_fmt (); |
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369 break; |
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370 } |
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371 break; |
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372 |
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373 case OCTAVE_VAX_G: |
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374 switch (fmt) |
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375 { |
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376 case OCTAVE_IEEE_LITTLE: |
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377 IEEE_little_double_to_VAX_G_double (data, len); |
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378 break; |
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379 |
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380 case OCTAVE_IEEE_BIG: |
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381 IEEE_big_double_to_VAX_G_double (data, len); |
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382 break; |
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383 |
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384 case OCTAVE_VAX_D: |
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385 VAX_D_double_to_VAX_G_double (data, len); |
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386 break; |
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387 |
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388 case OCTAVE_VAX_G: |
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389 break; |
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390 |
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391 case OCTAVE_CRAY: |
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392 Cray_to_VAX_G_double (data, len); |
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393 break; |
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394 |
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395 default: |
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396 gripe_unrecognized_float_fmt (); |
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397 break; |
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398 } |
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399 break; |
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400 |
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401 default: |
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402 (*current_liboctave_error_handler) |
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403 ("impossible state reached in file `%s' at line %d", |
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404 __FILE__, __LINE__); |
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405 break; |
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406 } |
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407 } |
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408 |
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409 void |
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410 do_float_format_conversion (float *data, int len, |
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411 floating_point_format fmt) |
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412 { |
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413 switch (native_float_format) |
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414 { |
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415 case OCTAVE_IEEE_LITTLE: |
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416 switch (fmt) |
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417 { |
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418 case OCTAVE_IEEE_LITTLE: |
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419 break; |
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420 |
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421 case OCTAVE_IEEE_BIG: |
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422 IEEE_big_float_to_IEEE_little_float (data, len); |
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423 break; |
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424 |
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425 case OCTAVE_VAX_D: |
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426 VAX_D_float_to_IEEE_little_float (data, len); |
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427 break; |
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428 |
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429 case OCTAVE_VAX_G: |
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430 VAX_G_float_to_IEEE_little_float (data, len); |
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431 break; |
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432 |
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433 case OCTAVE_CRAY: |
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434 Cray_to_IEEE_little_float (data, len); |
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435 break; |
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436 |
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437 default: |
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438 gripe_unrecognized_float_fmt (); |
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439 break; |
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440 } |
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441 break; |
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442 |
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443 case OCTAVE_IEEE_BIG: |
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444 switch (fmt) |
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445 { |
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446 case OCTAVE_IEEE_LITTLE: |
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447 IEEE_little_float_to_IEEE_big_float (data, len); |
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448 break; |
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449 |
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450 case OCTAVE_IEEE_BIG: |
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451 break; |
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452 |
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453 case OCTAVE_VAX_D: |
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454 VAX_D_float_to_IEEE_big_float (data, len); |
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455 break; |
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456 |
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457 case OCTAVE_VAX_G: |
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458 VAX_G_float_to_IEEE_big_float (data, len); |
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459 break; |
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460 |
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461 case OCTAVE_CRAY: |
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462 Cray_to_IEEE_big_float (data, len); |
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463 break; |
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464 |
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465 default: |
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466 gripe_unrecognized_float_fmt (); |
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467 break; |
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468 } |
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469 break; |
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470 |
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471 case OCTAVE_VAX_D: |
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472 switch (fmt) |
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473 { |
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474 case OCTAVE_IEEE_LITTLE: |
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475 IEEE_little_float_to_VAX_D_float (data, len); |
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476 break; |
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477 |
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478 case OCTAVE_IEEE_BIG: |
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479 IEEE_big_float_to_VAX_D_float (data, len); |
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480 break; |
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481 |
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482 case OCTAVE_VAX_D: |
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483 break; |
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484 |
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485 case OCTAVE_VAX_G: |
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486 VAX_G_float_to_VAX_D_float (data, len); |
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487 break; |
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488 |
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489 case OCTAVE_CRAY: |
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490 Cray_to_VAX_D_float (data, len); |
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491 break; |
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492 |
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493 default: |
|
|
494 gripe_unrecognized_float_fmt (); |
|
|
495 break; |
|
|
496 } |
|
|
497 break; |
|
|
498 |
|
|
499 case OCTAVE_VAX_G: |
|
|
500 switch (fmt) |
|
|
501 { |
|
|
502 case OCTAVE_IEEE_LITTLE: |
|
|
503 IEEE_little_float_to_VAX_G_float (data, len); |
|
|
504 break; |
|
|
505 |
|
|
506 case OCTAVE_IEEE_BIG: |
|
|
507 IEEE_big_float_to_VAX_G_float (data, len); |
|
|
508 break; |
|
|
509 |
|
|
510 case OCTAVE_VAX_D: |
|
|
511 VAX_D_float_to_VAX_G_float (data, len); |
|
|
512 break; |
|
|
513 |
|
|
514 case OCTAVE_VAX_G: |
|
|
515 break; |
|
|
516 |
|
|
517 case OCTAVE_CRAY: |
|
|
518 Cray_to_VAX_G_float (data, len); |
|
|
519 break; |
|
|
520 |
|
|
521 default: |
|
|
522 gripe_unrecognized_float_fmt (); |
|
|
523 break; |
|
|
524 } |
|
|
525 break; |
|
|
526 |
|
|
527 default: |
|
|
528 (*current_liboctave_error_handler) |
|
|
529 ("impossible state reached in file `%s' at line %d", |
|
|
530 __FILE__, __LINE__); |
|
|
531 break; |
|
|
532 } |
|
|
533 } |
|
|
534 |
|
|
535 void |
|
|
536 read_doubles (istream& is, double *data, save_type type, int len, |
|
|
537 int swap, floating_point_format fmt) |
|
|
538 { |
|
|
539 switch (type) |
|
|
540 { |
|
|
541 case LS_U_CHAR: |
|
|
542 LS_DO_READ (unsigned char, swap, data, 1, len, is); |
|
|
543 break; |
|
|
544 |
|
|
545 case LS_U_SHORT: |
|
|
546 LS_DO_READ (unsigned TWO_BYTE_INT, swap, data, 2, len, is); |
|
|
547 break; |
|
|
548 |
|
|
549 case LS_U_INT: |
|
|
550 LS_DO_READ (unsigned FOUR_BYTE_INT, swap, data, 4, len, is); |
|
|
551 break; |
|
|
552 |
|
|
553 case LS_CHAR: |
|
|
554 LS_DO_READ (signed char, swap, data, 1, len, is); |
|
|
555 break; |
|
|
556 |
|
|
557 case LS_SHORT: |
|
|
558 LS_DO_READ (TWO_BYTE_INT, swap, data, 2, len, is); |
|
|
559 break; |
|
|
560 |
|
|
561 case LS_INT: |
|
|
562 LS_DO_READ (FOUR_BYTE_INT, swap, data, 4, len, is); |
|
|
563 break; |
|
|
564 |
|
|
565 case LS_FLOAT: |
|
|
566 { |
|
|
567 volatile float *ptr = (float *) data; |
|
|
568 is.read (data, 4 * len); |
|
|
569 do_float_format_conversion ((float *) data, len, fmt); |
|
|
570 float tmp = ptr[0]; |
|
|
571 for (int i = len - 1; i > 0; i--) |
|
|
572 data[i] = ptr[i]; |
|
|
573 data[0] = tmp; |
|
|
574 } |
|
|
575 break; |
|
|
576 |
|
|
577 case LS_DOUBLE: |
|
|
578 is.read (data, 8 * len); |
|
|
579 do_double_format_conversion (data, len, fmt); |
|
|
580 break; |
|
|
581 |
|
|
582 default: |
|
|
583 is.clear (ios::failbit|is.rdstate ()); |
|
|
584 break; |
|
|
585 } |
|
|
586 } |
|
|
587 |
|
|
588 void |
|
|
589 write_doubles (ostream& os, const double *data, save_type type, int len) |
|
|
590 { |
|
|
591 switch (type) |
|
|
592 { |
|
|
593 case LS_U_CHAR: |
|
|
594 LS_DO_WRITE (unsigned char, data, 1, len, os); |
|
|
595 break; |
|
|
596 |
|
|
597 case LS_U_SHORT: |
|
|
598 LS_DO_WRITE (unsigned TWO_BYTE_INT, data, 2, len, os); |
|
|
599 break; |
|
|
600 |
|
|
601 case LS_U_INT: |
|
|
602 LS_DO_WRITE (unsigned FOUR_BYTE_INT, data, 4, len, os); |
|
|
603 break; |
|
|
604 |
|
|
605 case LS_CHAR: |
|
|
606 LS_DO_WRITE (signed char, data, 1, len, os); |
|
|
607 break; |
|
|
608 |
|
|
609 case LS_SHORT: |
|
|
610 LS_DO_WRITE (TWO_BYTE_INT, data, 2, len, os); |
|
|
611 break; |
|
|
612 |
|
|
613 case LS_INT: |
|
|
614 LS_DO_WRITE (FOUR_BYTE_INT, data, 4, len, os); |
|
|
615 break; |
|
|
616 |
|
|
617 case LS_FLOAT: |
|
|
618 LS_DO_WRITE (float, data, 4, len, os); |
|
|
619 break; |
|
|
620 |
|
|
621 case LS_DOUBLE: |
|
|
622 { |
|
|
623 char tmp_type = (char) type; |
|
|
624 os.write (&tmp_type, 1); |
|
|
625 os.write (data, 8 * len); |
|
|
626 } |
|
|
627 break; |
|
|
628 |
|
|
629 default: |
|
|
630 (*current_liboctave_error_handler) |
|
|
631 ("unrecognized data format requested"); |
|
|
632 break; |
|
|
633 } |
|
|
634 } |
|
|
635 |
|
|
636 /* |
|
|
637 ;;; Local Variables: *** |
|
|
638 ;;; mode: C++ *** |
|
|
639 ;;; page-delimiter: "^/\\*" *** |
|
|
640 ;;; End: *** |
|
|
641 */ |
