Mercurial > octave
annotate libinterp/corefcn/typecast.cc @ 20921:4d3daf7e43f3
eliminate trailing whitespace in source files
* data.cc, graphics.cc, lu.cc, mappers.cc, max.cc, typecast.cc,
ov-classdef.cc, ov-usr-fcn.cc: Eliminate trailing whitespace.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 16 Dec 2015 18:21:46 -0500 |
parents | 1142cf6abc0d |
children | b17fda023ca6 |
rev | line source |
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6869 | 1 /* |
2 | |
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3 Copyright (C) 2007-2015 David Bateman |
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4 Copyright (C) 2009 VZLU Prague |
6869 | 5 |
6 This file is part of Octave. | |
7 | |
8 Octave is free software; you can redistribute it and/or modify it | |
9 under the terms of the GNU General Public License as published by the | |
7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
11 option) any later version. | |
6869 | 12 |
13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 for more details. | |
17 | |
18 You should have received a copy of the GNU General Public License | |
7016 | 19 along with Octave; see the file COPYING. If not, see |
20 <http://www.gnu.org/licenses/>. | |
6869 | 21 |
22 */ | |
23 | |
24 #ifdef HAVE_CONFIG_H | |
25 #include <config.h> | |
26 #endif | |
27 | |
17396 | 28 #include <limits> |
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29 |
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30 #include "mx-base.h" |
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31 |
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32 #include "defun.h" |
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33 #include "error.h" |
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34 #include "gripes.h" |
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35 #include "oct-obj.h" |
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36 #include "unwind-prot.h" |
6869 | 37 |
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38 static dim_vector |
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39 get_vec_dims (const dim_vector& old_dims, octave_idx_type n) |
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40 { |
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41 if (old_dims.length () == 2 && old_dims(0) == 1) |
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42 return dim_vector (1, n); |
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43 else if (old_dims.length () == 2 && old_dims(0) == 0 && old_dims(1) == 0) |
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44 return dim_vector (); |
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45 else |
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46 return dim_vector (n, 1); |
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47 } |
6869 | 48 |
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49 template <class ArrayType> |
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50 static void |
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51 get_data_and_bytesize (const ArrayType& array, |
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52 const void *& data, |
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53 octave_idx_type& byte_size, |
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54 dim_vector& old_dims, |
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55 unwind_protect& frame) |
6869 | 56 { |
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57 // The array given may be a temporary, constructed from a scalar or sparse |
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58 // array. This will ensure the data will be deallocated after we exit. |
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59 frame.add_delete (new ArrayType (array)); |
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60 |
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61 data = reinterpret_cast<const void *> (array.data ()); |
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62 byte_size = array.byte_size (); |
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63 |
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64 old_dims = array.dims (); |
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65 } |
6869 | 66 |
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67 template <class ArrayType> |
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68 static ArrayType |
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69 reinterpret_copy (const void *data, octave_idx_type byte_size, |
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70 const dim_vector& old_dims) |
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71 { |
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72 typedef typename ArrayType::element_type T; |
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73 octave_idx_type n = byte_size / sizeof (T); |
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74 |
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75 if (n * static_cast<int> (sizeof (T)) == byte_size) |
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76 { |
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77 ArrayType retval (get_vec_dims (old_dims, n)); |
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78 T *dest = retval.fortran_vec (); |
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79 std::memcpy (dest, data, n * sizeof (T)); |
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80 |
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81 return retval; |
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82 } |
6869 | 83 else |
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84 error ("typecast: incorrect number of input values to make output value"); |
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85 |
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86 return ArrayType (); |
6869 | 87 } |
88 | |
89 | |
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90 DEFUN (typecast, args, , |
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91 "-*- texinfo -*-\n\ |
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92 @deftypefn {} {@var{y} =} typecast (@var{x}, \"@var{class}\")\n\ |
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93 Return a new array @var{y} resulting from interpreting the data of @var{x}\n\ |
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94 in memory as data of the numeric class @var{class}.\n\ |
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95 \n\ |
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96 Both the class of @var{x} and @var{class} must be one of the built-in\n\ |
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97 numeric classes:\n\ |
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98 \n\ |
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99 @example\n\ |
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100 @group\n\ |
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101 \"logical\"\n\ |
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102 \"char\"\n\ |
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103 \"int8\"\n\ |
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104 \"int16\"\n\ |
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105 \"int32\"\n\ |
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106 \"int64\"\n\ |
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107 \"uint8\"\n\ |
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108 \"uint16\"\n\ |
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109 \"uint32\"\n\ |
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110 \"uint64\"\n\ |
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111 \"double\"\n\ |
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112 \"single\"\n\ |
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113 \"double complex\"\n\ |
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114 \"single complex\"\n\ |
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115 @end group\n\ |
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116 @end example\n\ |
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117 \n\ |
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118 @noindent\n\ |
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119 the last two are only used with @var{class}; they indicate that a\n\ |
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120 complex-valued result is requested. Complex arrays are stored in memory as\n\ |
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121 consecutive pairs of real numbers. The sizes of integer types are given by\n\ |
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122 their bit counts. Both logical and char are typically one byte wide;\n\ |
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123 however, this is not guaranteed by C++. If your system is IEEE conformant,\n\ |
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124 single and double will be 4 bytes and 8 bytes wide, respectively.\n\ |
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125 @qcode{\"logical\"} is not allowed for @var{class}.\n\ |
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126 \n\ |
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127 If the input is a row vector, the return value is a row vector, otherwise it\n\ |
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128 is a column vector.\n\ |
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129 \n\ |
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130 If the bit length of @var{x} is not divisible by that of @var{class}, an\n\ |
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131 error occurs.\n\ |
6869 | 132 \n\ |
133 An example of the use of typecast on a little-endian machine is\n\ | |
134 \n\ | |
135 @example\n\ | |
136 @group\n\ | |
137 @var{x} = uint16 ([1, 65535]);\n\ | |
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138 typecast (@var{x}, \"uint8\")\n\ |
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139 @result{} [ 1, 0, 255, 255]\n\ |
6869 | 140 @end group\n\ |
141 @end example\n\ | |
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142 @seealso{cast, bitpack, bitunpack, swapbytes}\n\ |
6869 | 143 @end deftypefn") |
144 { | |
145 octave_value retval; | |
146 | |
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147 if (args.length () != 2) |
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148 print_usage (); |
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149 |
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150 unwind_protect frame; |
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151 const void *data = 0; |
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152 octave_idx_type byte_size = 0; |
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153 dim_vector old_dims; |
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154 |
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155 octave_value array = args(0); |
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156 |
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157 if (array.is_bool_type ()) |
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158 get_data_and_bytesize (array.bool_array_value (), data, byte_size, |
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159 old_dims, frame); |
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160 else if (array.is_string ()) |
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161 get_data_and_bytesize (array.char_array_value (), data, byte_size, |
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162 old_dims, frame); |
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163 else if (array.is_integer_type ()) |
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164 { |
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165 if (array.is_int8_type ()) |
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166 get_data_and_bytesize (array.int8_array_value (), data, byte_size, |
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167 old_dims, frame); |
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168 else if (array.is_int16_type ()) |
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169 get_data_and_bytesize (array.int16_array_value (), data, byte_size, |
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170 old_dims, frame); |
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171 else if (array.is_int32_type ()) |
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172 get_data_and_bytesize (array.int32_array_value (), data, byte_size, |
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173 old_dims, frame); |
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174 else if (array.is_int64_type ()) |
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175 get_data_and_bytesize (array.int64_array_value (), data, byte_size, |
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176 old_dims, frame); |
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177 else if (array.is_uint8_type ()) |
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178 get_data_and_bytesize (array.uint8_array_value (), data, byte_size, |
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179 old_dims, frame); |
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180 else if (array.is_uint16_type ()) |
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181 get_data_and_bytesize (array.uint16_array_value (), data, byte_size, |
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182 old_dims, frame); |
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183 else if (array.is_uint32_type ()) |
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184 get_data_and_bytesize (array.uint32_array_value (), data, byte_size, |
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185 old_dims, frame); |
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186 else if (array.is_uint64_type ()) |
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187 get_data_and_bytesize (array.uint64_array_value (), data, byte_size, |
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188 old_dims, frame); |
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189 else |
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190 assert (0); |
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191 } |
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192 else if (array.is_complex_type ()) |
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193 { |
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194 if (array.is_single_type ()) |
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195 get_data_and_bytesize (array.float_complex_array_value (), data, |
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196 byte_size, old_dims, frame); |
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197 else |
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198 get_data_and_bytesize (array.complex_array_value (), data, |
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199 byte_size, old_dims, frame); |
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200 } |
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201 else if (array.is_real_type ()) |
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202 { |
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203 if (array.is_single_type ()) |
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204 get_data_and_bytesize (array.float_array_value (), data, byte_size, |
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205 old_dims, frame); |
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206 else |
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207 get_data_and_bytesize (array.array_value (), data, byte_size, |
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208 old_dims, frame); } |
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209 else |
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210 error ("typecast: invalid input class: %s", |
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211 array.class_name ().c_str ()); |
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212 |
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213 std::string numclass = args(1).string_value (); |
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214 |
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215 if (numclass.size () == 0) |
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216 ; |
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217 else if (numclass == "char") |
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218 retval = octave_value (reinterpret_copy<charNDArray> |
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219 (data, byte_size, old_dims), array.is_dq_string () ? '"' |
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220 : '\''); |
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221 else if (numclass[0] == 'i') |
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222 { |
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223 if (numclass == "int8") |
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224 retval = reinterpret_copy<int8NDArray> (data, byte_size, old_dims); |
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225 else if (numclass == "int16") |
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226 retval = reinterpret_copy<int16NDArray> (data, byte_size, old_dims); |
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227 else if (numclass == "int32") |
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228 retval = reinterpret_copy<int32NDArray> (data, byte_size, old_dims); |
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229 else if (numclass == "int64") |
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230 retval = reinterpret_copy<int64NDArray> (data, byte_size, old_dims); |
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231 } |
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232 else if (numclass[0] == 'u') |
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233 { |
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234 if (numclass == "uint8") |
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235 retval = reinterpret_copy<uint8NDArray> (data, byte_size, old_dims); |
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236 else if (numclass == "uint16") |
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237 retval = reinterpret_copy<uint16NDArray> (data, byte_size, |
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238 old_dims); |
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239 else if (numclass == "uint32") |
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240 retval = reinterpret_copy<uint32NDArray> (data, byte_size, |
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241 old_dims); |
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242 else if (numclass == "uint64") |
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243 retval = reinterpret_copy<uint64NDArray> (data, byte_size, |
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244 old_dims); |
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245 } |
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246 else if (numclass == "single") |
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247 retval = reinterpret_copy<FloatNDArray> (data, byte_size, old_dims); |
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248 else if (numclass == "double") |
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249 retval = reinterpret_copy<NDArray> (data, byte_size, old_dims); |
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250 else if (numclass == "single complex") |
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251 retval = reinterpret_copy<FloatComplexNDArray> (data, byte_size, |
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252 old_dims); |
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253 else if (numclass == "double complex") |
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254 retval = reinterpret_copy<ComplexNDArray> (data, byte_size, old_dims); |
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255 |
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256 if (retval.is_undefined ()) |
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257 error ("typecast: cannot convert to %s class", numclass.c_str ()); |
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258 |
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259 return retval; |
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260 } |
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261 |
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262 template <class ArrayType> |
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263 ArrayType |
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264 do_bitpack (const boolNDArray& bitp) |
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265 { |
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266 typedef typename ArrayType::element_type T; |
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267 octave_idx_type n |
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268 = bitp.numel () / (sizeof (T) * std::numeric_limits<unsigned char>::digits); |
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269 |
17396 | 270 if (n * static_cast<int> (sizeof (T)) * std::numeric_limits<unsigned char>::digits == bitp.numel ()) |
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271 { |
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272 |
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273 ArrayType retval (get_vec_dims (bitp.dims (), n)); |
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274 |
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275 const bool *bits = bitp.fortran_vec (); |
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276 char *packed = reinterpret_cast<char *> (retval.fortran_vec ()); |
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277 |
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278 octave_idx_type m = n * sizeof (T); |
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279 |
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280 for (octave_idx_type i = 0; i < m; i++) |
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281 { |
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282 char c = bits[0]; |
17396 | 283 for (int j = 1; j < std::numeric_limits<unsigned char>::digits; j++) |
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284 c |= bits[j] << j; |
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285 |
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286 packed[i] = c; |
17396 | 287 bits += std::numeric_limits<unsigned char>::digits; |
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288 } |
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289 |
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290 return retval; |
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291 } |
6869 | 292 else |
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293 error ("bitpack: incorrect number of bits to make up output value"); |
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294 |
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295 return ArrayType (); |
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296 } |
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298 DEFUN (bitpack, args, , |
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299 "-*- texinfo -*-\n\ |
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300 @deftypefn {} {@var{y} =} bitpack (@var{x}, @var{class})\n\ |
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301 Return a new array @var{y} resulting from interpreting the logical array\n\ |
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302 @var{x} as raw bit patterns for data of the numeric class @var{class}.\n\ |
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303 \n\ |
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304 @var{class} must be one of the built-in numeric classes:\n\ |
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305 \n\ |
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306 @example\n\ |
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307 @group\n\ |
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308 \"double\"\n\ |
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309 \"single\"\n\ |
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310 \"double complex\"\n\ |
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311 \"single complex\"\n\ |
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312 \"char\"\n\ |
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313 \"int8\"\n\ |
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314 \"int16\"\n\ |
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315 \"int32\"\n\ |
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316 \"int64\"\n\ |
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317 \"uint8\"\n\ |
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318 \"uint16\"\n\ |
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319 \"uint32\"\n\ |
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320 \"uint64\"\n\ |
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321 @end group\n\ |
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322 @end example\n\ |
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323 \n\ |
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325 @var{class}. If it is not, excess bits are discarded. Bits come in\n\ |
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326 increasing order of significance, i.e., @code{x(1)} is bit 0, @code{x(2)} is\n\ |
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327 bit 1, etc.\n\ |
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328 \n\ |
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329 The result is a row vector if @var{x} is a row vector, otherwise it is a\n\ |
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330 column vector.\n\ |
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331 @seealso{bitunpack, typecast}\n\ |
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332 @end deftypefn") |
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333 { |
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334 octave_value retval; |
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335 |
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336 if (args.length () != 2) |
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337 print_usage (); |
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338 |
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339 if (! args(0).is_bool_type ()) |
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340 error ("bitpack: X must be a logical array"); |
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341 |
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342 boolNDArray bitp = args(0).bool_array_value (); |
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343 |
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344 std::string numclass = args(1).string_value (); |
6869 | 345 |
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346 if (numclass.size () == 0) |
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347 ; |
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348 else if (numclass == "char") |
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349 retval = octave_value (do_bitpack<charNDArray> (bitp), '\''); |
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350 else if (numclass[0] == 'i') |
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351 { |
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352 if (numclass == "int8") |
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353 retval = do_bitpack<int8NDArray> (bitp); |
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354 else if (numclass == "int16") |
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355 retval = do_bitpack<int16NDArray> (bitp); |
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356 else if (numclass == "int32") |
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357 retval = do_bitpack<int32NDArray> (bitp); |
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358 else if (numclass == "int64") |
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359 retval = do_bitpack<int64NDArray> (bitp); |
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360 } |
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361 else if (numclass[0] == 'u') |
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362 { |
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363 if (numclass == "uint8") |
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364 retval = do_bitpack<uint8NDArray> (bitp); |
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365 else if (numclass == "uint16") |
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366 retval = do_bitpack<uint16NDArray> (bitp); |
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367 else if (numclass == "uint32") |
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368 retval = do_bitpack<uint32NDArray> (bitp); |
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369 else if (numclass == "uint64") |
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370 retval = do_bitpack<uint64NDArray> (bitp); |
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371 } |
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372 else if (numclass == "single") |
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373 retval = do_bitpack<FloatNDArray> (bitp); |
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374 else if (numclass == "double") |
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375 retval = do_bitpack<NDArray> (bitp); |
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376 else if (numclass == "single complex") |
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377 retval = do_bitpack<FloatComplexNDArray> (bitp); |
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378 else if (numclass == "double complex") |
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379 retval = do_bitpack<ComplexNDArray> (bitp); |
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381 if (retval.is_undefined ()) |
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382 error ("bitpack: cannot pack to %s class", numclass.c_str ()); |
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383 |
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384 return retval; |
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385 } |
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386 |
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387 template <class ArrayType> |
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388 boolNDArray |
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389 do_bitunpack (const ArrayType& array) |
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390 { |
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391 typedef typename ArrayType::element_type T; |
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392 octave_idx_type n = array.numel () * sizeof (T) |
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393 * std::numeric_limits<unsigned char>::digits; |
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394 |
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395 boolNDArray retval (get_vec_dims (array.dims (), n)); |
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396 |
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397 const char *packed = reinterpret_cast<const char *> (array.fortran_vec ()); |
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398 bool *bits = retval.fortran_vec (); |
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399 |
17396 | 400 octave_idx_type m = n / std::numeric_limits<unsigned char>::digits; |
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401 |
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402 for (octave_idx_type i = 0; i < m; i++) |
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403 { |
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404 char c = packed[i]; |
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405 bits[0] = c & 1; |
17396 | 406 for (int j = 1; j < std::numeric_limits<unsigned char>::digits; j++) |
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407 bits[j] = (c >>= 1) & 1; |
17396 | 408 bits += std::numeric_limits<unsigned char>::digits; |
6869 | 409 } |
410 | |
411 return retval; | |
412 } | |
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413 |
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414 DEFUN (bitunpack, args, , |
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415 "-*- texinfo -*-\n\ |
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416 @deftypefn {} {@var{y} =} bitunpack (@var{x})\n\ |
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417 Return a logical array @var{y} corresponding to the raw bit patterns of\n\ |
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418 @var{x}.\n\ |
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419 \n\ |
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420 @var{x} must belong to one of the built-in numeric classes:\n\ |
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421 \n\ |
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422 @example\n\ |
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423 @group\n\ |
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424 \"double\"\n\ |
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425 \"single\"\n\ |
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426 \"char\"\n\ |
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427 \"int8\"\n\ |
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428 \"int16\"\n\ |
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429 \"int32\"\n\ |
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430 \"int64\"\n\ |
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431 \"uint8\"\n\ |
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432 \"uint16\"\n\ |
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433 \"uint32\"\n\ |
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434 \"uint64\"\n\ |
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435 @end group\n\ |
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436 @end example\n\ |
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437 \n\ |
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438 The result is a row vector if @var{x} is a row vector; otherwise, it is a\n\ |
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439 column vector.\n\ |
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440 @seealso{bitpack, typecast}\n\ |
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441 @end deftypefn") |
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442 { |
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443 octave_value retval; |
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444 |
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445 if (args.length () != 1) |
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446 print_usage (); |
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447 |
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448 if (! (args(0).is_numeric_type () || args(0).is_string ())) |
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449 error ("bitunpack: argument must be a number or a string"); |
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450 |
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451 octave_value array = args(0); |
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452 |
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453 if (array.is_string ()) |
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454 retval = do_bitunpack (array.char_array_value ()); |
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455 else if (array.is_integer_type ()) |
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456 { |
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457 if (array.is_int8_type ()) |
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458 retval = do_bitunpack (array.int8_array_value ()); |
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459 else if (array.is_int16_type ()) |
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460 retval = do_bitunpack (array.int16_array_value ()); |
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461 else if (array.is_int32_type ()) |
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462 retval = do_bitunpack (array.int32_array_value ()); |
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463 else if (array.is_int64_type ()) |
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464 retval = do_bitunpack (array.int64_array_value ()); |
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465 else if (array.is_uint8_type ()) |
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466 retval = do_bitunpack (array.uint8_array_value ()); |
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467 else if (array.is_uint16_type ()) |
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468 retval = do_bitunpack (array.uint16_array_value ()); |
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469 else if (array.is_uint32_type ()) |
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470 retval = do_bitunpack (array.uint32_array_value ()); |
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471 else if (array.is_uint64_type ()) |
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472 retval = do_bitunpack (array.uint64_array_value ()); |
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473 else |
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474 assert (0); |
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475 } |
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476 else if (array.is_complex_type ()) |
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477 { |
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478 if (array.is_single_type ()) |
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479 retval = do_bitunpack (array.float_complex_array_value ()); |
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480 else |
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481 retval = do_bitunpack (array.complex_array_value ()); |
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482 } |
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483 else if (array.is_real_type ()) |
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484 { |
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485 if (array.is_single_type ()) |
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486 retval = do_bitunpack (array.float_array_value ()); |
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487 else |
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488 retval = do_bitunpack (array.array_value ()); |
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489 } |
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490 else |
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491 error ("bitunpack: invalid input class: %s", |
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492 array.class_name ().c_str ()); |
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493 |
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494 return retval; |
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495 } |