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__magick_read__.cc (encode_uint_image): initialize bitdepth
author Soren Hauberg <hauberg@gmail.com>
date Thu, 15 Jan 2009 00:36:18 -0500
parents e3c9102431a9
children 937921654627
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1 // Template array classes
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2 /*
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3
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4 Copyright (C) 1996, 1997, 2000, 2002, 2003, 2004, 2005, 2006, 2007
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5 John W. Eaton
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6 Copyright (C) 2008 Jaroslav Hajek
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7
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8 This file is part of Octave.
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9
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10 Octave is free software; you can redistribute it and/or modify it
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11 under the terms of the GNU General Public License as published by the
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12 Free Software Foundation; either version 3 of the License, or (at your
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13 option) any later version.
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14
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15 Octave is distributed in the hope that it will be useful, but WITHOUT
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16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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18 for more details.
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19
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20 You should have received a copy of the GNU General Public License
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21 along with Octave; see the file COPYING. If not, see
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22 <http://www.gnu.org/licenses/>.
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23
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24 */
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25
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26 #if !defined (octave_DiagArray2_h)
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27 #define octave_DiagArray2_h 1
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28
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29 #include <cassert>
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30 #include <cstdlib>
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31
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32 #include "Array.h"
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33 #include "lo-error.h"
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34
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35 // A two-dimensional array with diagonal elements only.
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36 //
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37 // Idea and example code for Proxy class and functions from:
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38 //
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39 // From: kanze@us-es.sel.de (James Kanze)
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40 // Subject: Re: How to overload [] to do READ/WRITE differently ?
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41 // Message-ID: <KANZE.93Nov29151407@slsvhdt.us-es.sel.de>
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42 // Sender: news@us-es.sel.de
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43 // Date: 29 Nov 1993 14:14:07 GMT
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44 // --
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45 // James Kanze email: kanze@us-es.sel.de
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46 // GABI Software, Sarl., 8 rue du Faisan, F-67000 Strasbourg, France
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47
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48 // Array<T> is inherited privately because we abuse the dimensions variable
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49 // for true dimensions. Therefore, the inherited Array<T> object is not a valid
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50 // Array<T> object, and should not be publicly accessible.
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51
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52 template <class T>
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53 class
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54 DiagArray2 : private Array<T>
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55 {
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56 private:
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57
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58 T get (octave_idx_type i) { return Array<T>::xelem (i); }
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59
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60 void set (const T& val, octave_idx_type i) { Array<T>::xelem (i) = val; }
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61
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62 class Proxy
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63 {
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64 public:
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65
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66 Proxy (DiagArray2<T> *ref, octave_idx_type r, octave_idx_type c)
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67 : i (r), j (c), object (ref) { }
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68
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69 const Proxy& operator = (const T& val) const
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70 {
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71 if (i == j)
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72 {
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73 if (object)
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74 object->set (val, i);
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75 }
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76 else
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77 (*current_liboctave_error_handler)
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78 ("invalid assignment to off-diagonal in diagonal array");
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79
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80 return *this;
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81 }
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82
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83 operator T () const
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84 {
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85 if (object && i == j)
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86 return object->get (i);
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87 else
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88 {
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89 static T foo;
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90 return foo;
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91 }
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92 }
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93
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94 private:
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95
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96 // FIXME -- this is declared private to keep the user from
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97 // taking the address of a Proxy. Maybe it should be implemented
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98 // by means of a companion function in the DiagArray2 class.
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99
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100 T *operator& () const { assert (0); return 0; }
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101
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102 octave_idx_type i;
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103 octave_idx_type j;
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104
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105 DiagArray2<T> *object;
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106
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107 };
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108
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109 friend class Proxy;
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110
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111 protected:
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112
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113 DiagArray2 (T *d, octave_idx_type r, octave_idx_type c) : Array<T> (d, r < c ? r : c)
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114 { Array<T>::dimensions = dim_vector (r, c); }
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115
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116 public:
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117
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118 typedef T element_type;
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119
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120 DiagArray2 (void) : Array<T> (dim_vector (0, 0)) { }
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121
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122 DiagArray2 (octave_idx_type r, octave_idx_type c) : Array<T> (r < c ? r : c)
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123 { this->dimensions = dim_vector (r, c); }
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124
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125 DiagArray2 (octave_idx_type r, octave_idx_type c, const T& val) : Array<T> (r < c ? r : c)
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126 {
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127 this->dimensions = dim_vector (r, c);
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128
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129 Array<T>::fill (val);
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130 }
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131
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132 DiagArray2 (const Array<T>& a) : Array<T> (a)
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133 { this->dimensions = dim_vector (a.length (), a.length ()); }
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134
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135 DiagArray2 (const DiagArray2<T>& a) : Array<T> (a)
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136 { this->dimensions = a.dims (); }
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137
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138 template <class U>
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139 DiagArray2 (const DiagArray2<U>& a) : Array<T> (a.diag ())
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140 { this->dimensions = a.dims (); }
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141
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142 ~DiagArray2 (void) { }
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143
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144 DiagArray2<T>& operator = (const DiagArray2<T>& a)
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145 {
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146 if (this != &a)
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147 Array<T>::operator = (a);
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148
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149 return *this;
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150 }
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151
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152
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153 octave_idx_type dim1 (void) const { return Array<T>::dimensions(0); }
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154 octave_idx_type dim2 (void) const { return Array<T>::dimensions(1); }
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155
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156 octave_idx_type rows (void) const { return dim1 (); }
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157 octave_idx_type cols (void) const { return dim2 (); }
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158 octave_idx_type columns (void) const { return dim2 (); }
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159
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160 octave_idx_type length (void) const { return Array<T>::length (); }
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161 octave_idx_type nelem (void) const { return dim1 () * dim2 (); }
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162 octave_idx_type numel (void) const { return nelem (); }
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163
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164 size_t byte_size (void) const { return length () * sizeof (T); }
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165
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166 dim_vector dims (void) const { return Array<T>::dimensions; }
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167
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168 Array<T> diag (octave_idx_type k = 0) const;
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169
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170 Proxy elem (octave_idx_type r, octave_idx_type c)
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171 {
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172 return Proxy (this, r, c);
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173 }
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174
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175 Proxy checkelem (octave_idx_type r, octave_idx_type c)
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176 {
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177 if (r < 0 || c < 0 || r >= dim1 () || c >= dim2 ())
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178 {
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179 (*current_liboctave_error_handler) ("range error in DiagArray2");
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180 return Proxy (0, r, c);
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181 }
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182 else
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183 return Proxy (this, r, c);
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184 }
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185
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186 Proxy operator () (octave_idx_type r, octave_idx_type c)
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187 {
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188 if (r < 0 || c < 0 || r >= dim1 () || c >= dim2 ())
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189 {
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190 (*current_liboctave_error_handler) ("range error in DiagArray2");
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191 return Proxy (0, r, c);
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192 }
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193 else
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194 return Proxy (this, r, c);
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195 }
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196
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197 T elem (octave_idx_type r, octave_idx_type c) const
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198 {
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199 return (r == c) ? Array<T>::xelem (r) : T (0);
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200 }
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201
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202 T checkelem (octave_idx_type r, octave_idx_type c) const;
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203 T operator () (octave_idx_type r, octave_idx_type c) const
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204 {
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205 #if defined (BOUNDS_CHECKING)
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206 return checkelem (r, c);
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207 #else
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208 return elem (r, c);
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209 #endif
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210 }
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211
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212 // No checking.
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213
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214 T& xelem (octave_idx_type r, octave_idx_type c)
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215 {
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216 static T foo (0);
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217 return (r == c) ? Array<T>::xelem (r) : foo;
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218 }
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219
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220 T xelem (octave_idx_type r, octave_idx_type c) const
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221 {
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222 return (r == c) ? Array<T>::xelem (r) : T (0);
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223 }
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224
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225 void resize (octave_idx_type n, octave_idx_type m);
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226 void resize (octave_idx_type n, octave_idx_type m, const T& val);
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227
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228 DiagArray2<T> transpose (void) const;
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229 DiagArray2<T> hermitian (T (*fcn) (const T&) = 0) const;
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230
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231 const T *data (void) const { return Array<T>::data (); }
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232
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233 const T *fortran_vec (void) const { return Array<T>::fortran_vec (); }
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234
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235 T *fortran_vec (void) { return Array<T>::fortran_vec (); }
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236
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237 void print_info (std::ostream& os, const std::string& prefix) const
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238 { Array<T>::print_info (os, prefix); }
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239 };
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240
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241 #endif
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242
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243 /*
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244 ;;; Local Variables: ***
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245 ;;; mode: C++ ***
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246 ;;; End: ***
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247 */