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annotate src/ls-oct-ascii.cc @ 10784:ca2df6737d6b

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generalize cell2mat optimization to n dimensions
author Jaroslav Hajek <highegg@gmail.com>
date Mon, 12 Jul 2010 21:32:18 +0200
parents ad29dbbc3f70
children 89f4d7e294cc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 1996, 1997, 2003, 2004, 2005, 2006, 2007, 2008 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 // Author: John W. Eaton.
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24
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25 #ifdef HAVE_CONFIG_H
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26 #include <config.h>
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27 #endif
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28
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29 #include <cstring>
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30 #include <cctype>
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31
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32 #include <fstream>
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33 #include <iomanip>
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34 #include <iostream>
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35 #include <sstream>
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36 #include <string>
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37
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38 #include "byte-swap.h"
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39 #include "data-conv.h"
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40 #include "file-ops.h"
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41 #include "glob-match.h"
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42 #include "lo-mappers.h"
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43 #include "mach-info.h"
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44 #include "oct-env.h"
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45 #include "oct-time.h"
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46 #include "quit.h"
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47 #include "str-vec.h"
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48
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49 #include "Cell.h"
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50 #include "defun.h"
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51 #include "error.h"
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52 #include "gripes.h"
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53 #include "load-save.h"
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54 #include "ls-ascii-helper.h"
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55 #include "ls-oct-ascii.h"
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56 #include "oct-obj.h"
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57 #include "oct-map.h"
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58 #include "ov-cell.h"
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59 #include "pager.h"
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60 #include "pt-exp.h"
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61 #include "unwind-prot.h"
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62 #include "utils.h"
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63 #include "variables.h"
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64 #include "version.h"
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65 #include "dMatrix.h"
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66
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67 // The number of decimal digits to use when writing ascii data.
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68 static int Vsave_precision = 16;
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69
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70 // Functions for reading ascii data.
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71
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72 // Extract a KEYWORD and its value from stream IS, returning the
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73 // associated value in a new string.
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74 //
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75 // Input should look something like:
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76 //
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77 // [%#][ \t]*keyword[ \t]*:[ \t]*string-value[ \t]*\n
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78
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79 std::string
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80 extract_keyword (std::istream& is, const char *keyword, const bool next_only)
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81 {
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82 std::string retval;
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83
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84 int ch = is.peek ();
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85 if (next_only && ch != '%' && ch != '#')
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86 return retval;
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87
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88 char c;
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89 while (is.get (c))
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90 {
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91 if (c == '%' || c == '#')
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92 {
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93 std::ostringstream buf;
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94
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95 while (is.get (c) && (c == ' ' || c == '\t' || c == '%' || c == '#'))
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96 ; // Skip whitespace and comment characters.
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97
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98 if (isalpha (c))
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99 buf << c;
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100
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101 while (is.get (c) && isalpha (c))
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102 buf << c;
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103
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104 std::string tmp = buf.str ();
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105 bool match = (tmp.compare (0, strlen (keyword), keyword) == 0);
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106
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107 if (match)
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108 {
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109 std::ostringstream value;
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110 while (is.get (c) && (c == ' ' || c == '\t' || c == ':'))
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111 ; // Skip whitespace and the colon.
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112
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113 is.putback(c);
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114 retval = read_until_newline (is, false);
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115 break;
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116 }
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117 else if (next_only)
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118 break;
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119 else
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120 skip_until_newline (is, false);
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121 }
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122 }
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123
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124 int len = retval.length ();
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125
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126 if (len > 0)
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127 {
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128 while (len)
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129 {
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130 c = retval[len-1];
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131
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132 if (c == ' ' || c == '\t')
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133 len--;
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134 else
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135 {
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136 retval.resize (len);
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137 break;
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138 }
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139 }
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140 }
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141
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142 return retval;
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143 }
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144
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145 // Extract one value (scalar, matrix, string, etc.) from stream IS and
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146 // place it in TC, returning the name of the variable. If the value
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147 // is tagged as global in the file, return TRUE in GLOBAL.
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148 //
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149 // Each type supplies its own function to load the data, and so this
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150 // function is extensible.
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151 //
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152 // FILENAME is used for error messages.
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153 //
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154 // The data is expected to be in the following format:
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155 //
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156 // The input file must have a header followed by some data.
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157 //
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158 // All lines in the header must begin with a `#' character.
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159 //
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160 // The header must contain a list of keyword and value pairs with the
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161 // keyword and value separated by a colon.
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162 //
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163 // Keywords must appear in the following order:
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164 //
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165 // # name: <name>
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166 // # type: <type>
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167 // # <info>
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168 //
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169 // Where, for the built in types are:
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170 //
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171 // <name> : a valid identifier
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172 //
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173 // <type> : <typename>
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174 // | global <typename>
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175 //
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176 // <typename> : scalar
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177 // | complex scalar
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178 // | matrix
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179 // | complex matrix
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180 // | bool
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181 // | bool matrix
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182 // | string
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183 // | range
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184 //
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185 // <info> : <matrix info>
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186 // | <string info>
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187 //
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188 // <matrix info> : # rows: <integer>
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189 // : # columns: <integer>
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190 //
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191 // <string info> : # elements: <integer>
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192 // : # length: <integer> (once before each string)
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193 //
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194 // For backward compatibility the type "string array" is treated as a
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195 // "string" type. Also "string" can have a single element with no elements
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196 // line such that
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197 //
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198 // <string info> : # length: <integer>
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199 //
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200 // Formatted ASCII data follows the header.
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201 //
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202 // Example:
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203 //
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204 // # name: foo
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205 // # type: matrix
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206 // # rows: 2
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207 // # columns: 2
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208 // 2 4
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209 // 1 3
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210 //
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211 // Example:
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212 //
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213 // # name: foo
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214 // # type: string
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215 // # elements: 5
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216 // # length: 4
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217 // this
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218 // # length: 2
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219 // is
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220 // # length: 1
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221 // a
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222 // # length: 6
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223 // string
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224 // # length: 5
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225 // array
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226 //
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227 // FIXME -- this format is fairly rigid, and doesn't allow for
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228 // arbitrary comments. Someone should fix that. It does allow arbitrary
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229 // types however.
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230
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231 // Ugh. The signature of the compare method is not standard in older
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232 // versions of the GNU libstdc++. Do this instead:
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233
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234 #define SUBSTRING_COMPARE_EQ(s, pos, n, t) (s.substr (pos, n) == t)
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235
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236 std::string
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237 read_ascii_data (std::istream& is, const std::string& filename, bool& global,
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238 octave_value& tc, octave_idx_type count)
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239 {
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240 // Read name for this entry or break on EOF.
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241
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242 std::string name = extract_keyword (is, "name");
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243
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244 if (name.empty ())
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245 {
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246 if (count == 0)
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247 error ("load: empty name keyword or no data found in file `%s'",
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248 filename.c_str ());
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249
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250 return std::string ();
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251 }
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252
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253 if (! (name == ".nargin." || name == ".nargout."
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254 || name == CELL_ELT_TAG || valid_identifier (name)))
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255 {
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256 error ("load: bogus identifier `%s' found in file `%s'",
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257 name.c_str (), filename.c_str ());
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258 return std::string ();
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259 }
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260
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261 // Look for type keyword.
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262
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263 std::string tag = extract_keyword (is, "type");
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264
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265 if (! tag.empty ())
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266 {
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267 std::string typ;
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268 size_t pos = tag.rfind (' ');
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269
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270 if (pos != std::string::npos)
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271 {
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272 global = SUBSTRING_COMPARE_EQ (tag, 0, 6, "global");
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273
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274 typ = global ? tag.substr (7) : tag;
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275 }
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276 else
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277 typ = tag;
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278
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279 // Special case for backward compatiablity. A small bit of cruft
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280 if (SUBSTRING_COMPARE_EQ (typ, 0, 12, "string array"))
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281 tc = charMatrix ();
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282 else
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283 tc = octave_value_typeinfo::lookup_type (typ);
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284
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285 if (! tc.load_ascii (is))
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286 error ("load: trouble reading ascii file `%s'", filename.c_str ());
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287 }
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288 else
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289 error ("load: failed to extract keyword specifying value type");
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290
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291 if (error_state)
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292 {
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293 error ("load: reading file %s", filename.c_str ());
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294 return std::string ();
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295 }
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296
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297 return name;
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298 }
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299
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300 // Save the data from TC along with the corresponding NAME, and global
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301 // flag MARK_AS_GLOBAL on stream OS in the plain text format described
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302 // above for load_ascii_data. If NAME is empty, the name: line is not
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303 // generated. PRECISION specifies the number of decimal digits to print.
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304 //
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305 // Assumes ranges and strings cannot contain Inf or NaN values.
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306 //
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307 // Returns 1 for success and 0 for failure.
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308
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309 // FIXME -- should probably write the help string here too.
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310
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311 bool
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312 save_ascii_data (std::ostream& os, const octave_value& val_arg,
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313 const std::string& name, bool mark_as_global,
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314 int precision)
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315 {
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316 bool success = true;
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317
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318 if (! name.empty ())
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319 os << "# name: " << name << "\n";
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320
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321 octave_value val = val_arg;
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322
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323 if (mark_as_global)
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324 os << "# type: global " << val.type_name () << "\n";
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325 else
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326 os << "# type: " << val.type_name() << "\n";
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327
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328 if (! precision)
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329 precision = Vsave_precision;
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330
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331 long old_precision = os.precision ();
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332 os.precision (precision);
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333
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334 success = val.save_ascii (os);
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335
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336 // Insert an extra pair of newline characters after the data so that
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337 // multiple data elements may be handled separately by gnuplot (see
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338 // the description of the index qualifier for the plot command in the
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339 // gnuplot documentation).
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340 os << "\n\n";
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341
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342 os.precision (old_precision);
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343
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344 return (os && success);
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345 }
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346
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347 bool
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348 save_ascii_data_for_plotting (std::ostream& os, const octave_value& t,
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349 const std::string& name)
4634
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350 {
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351 return save_ascii_data (os, t, name, false, 6);
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352 }
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353
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354 // Maybe this should be a static function in tree-plot.cc?
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355
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356 // If TC is matrix, save it on stream OS in a format useful for
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357 // making a 3-dimensional plot with gnuplot. If PARAMETRIC is
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358 // TRUE, assume a parametric 3-dimensional plot will be generated.
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359
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360 bool
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361 save_three_d (std::ostream& os, const octave_value& tc, bool parametric)
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362 {
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363 bool fail = false;
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364
5275
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365 octave_idx_type nr = tc.rows ();
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366 octave_idx_type nc = tc.columns ();
4634
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367
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368 if (tc.is_real_matrix ())
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369 {
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370 os << "# 3D data...\n"
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371 << "# type: matrix\n"
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372 << "# total rows: " << nr << "\n"
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373 << "# total columns: " << nc << "\n";
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374
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375 long old_precision = os.precision ();
6257
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376 os.precision (6);
6171
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diff changeset
377
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378 if (parametric)
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diff changeset
379 {
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diff changeset
380 octave_idx_type extras = nc % 3;
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diff changeset
381 if (extras)
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382 warning ("ignoring last %d columns", extras);
4634
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383
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diff changeset
384 Matrix tmp = tc.matrix_value ();
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diff changeset
385 nr = tmp.rows ();
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diff changeset
386
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diff changeset
387 for (octave_idx_type i = 0; i < nc-extras; i += 3)
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diff changeset
388 {
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diff changeset
389 os << tmp.extract (0, i, nr-1, i+2);
57a59eae83cc untabify src C++ source files
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diff changeset
390 if (i+3 < nc-extras)
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diff changeset
391 os << "\n";
57a59eae83cc untabify src C++ source files
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diff changeset
392 }
57a59eae83cc untabify src C++ source files
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diff changeset
393 }
4634
79fe96966ca0 [project @ 2003-11-19 21:22:39 by jwe]
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394 else
10315
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diff changeset
395 {
57a59eae83cc untabify src C++ source files
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parents: 10160
diff changeset
396 Matrix tmp = tc.matrix_value ();
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diff changeset
397 nr = tmp.rows ();
4634
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parents:
diff changeset
398
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diff changeset
399 for (octave_idx_type i = 0; i < nc; i++)
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diff changeset
400 {
57a59eae83cc untabify src C++ source files
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diff changeset
401 os << tmp.extract (0, i, nr-1, i);
57a59eae83cc untabify src C++ source files
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diff changeset
402 if (i+1 < nc)
57a59eae83cc untabify src C++ source files
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diff changeset
403 os << "\n";
57a59eae83cc untabify src C++ source files
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diff changeset
404 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
405 }
6171
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diff changeset
406
4508e9d73ea1 [project @ 2006-11-15 20:03:18 by jwe]
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diff changeset
407 os.precision (old_precision);
4634
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parents:
diff changeset
408 }
79fe96966ca0 [project @ 2003-11-19 21:22:39 by jwe]
jwe
parents:
diff changeset
409 else
79fe96966ca0 [project @ 2003-11-19 21:22:39 by jwe]
jwe
parents:
diff changeset
410 {
79fe96966ca0 [project @ 2003-11-19 21:22:39 by jwe]
jwe
parents:
diff changeset
411 ::error ("for now, I can only save real matrices in 3D format");
79fe96966ca0 [project @ 2003-11-19 21:22:39 by jwe]
jwe
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diff changeset
412 fail = true;
79fe96966ca0 [project @ 2003-11-19 21:22:39 by jwe]
jwe
parents:
diff changeset
413 }
79fe96966ca0 [project @ 2003-11-19 21:22:39 by jwe]
jwe
parents:
diff changeset
414
79fe96966ca0 [project @ 2003-11-19 21:22:39 by jwe]
jwe
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diff changeset
415 return (os && ! fail);
79fe96966ca0 [project @ 2003-11-19 21:22:39 by jwe]
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parents:
diff changeset
416 }
79fe96966ca0 [project @ 2003-11-19 21:22:39 by jwe]
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diff changeset
417
5794
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diff changeset
418 DEFUN (save_precision, args, nargout,
1138ced03f14 [project @ 2006-05-08 20:23:04 by jwe]
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diff changeset
419 "-*- texinfo -*-\n\
1138ced03f14 [project @ 2006-05-08 20:23:04 by jwe]
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diff changeset
420 @deftypefn {Built-in Function} {@var{val} =} save_precision ()\n\
1138ced03f14 [project @ 2006-05-08 20:23:04 by jwe]
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parents: 5775
diff changeset
421 @deftypefnx {Built-in Function} {@var{old_val} =} save_precision (@var{new_val})\n\
1138ced03f14 [project @ 2006-05-08 20:23:04 by jwe]
jwe
parents: 5775
diff changeset
422 Query or set the internal variable that specifies the number of\n\
1138ced03f14 [project @ 2006-05-08 20:23:04 by jwe]
jwe
parents: 5775
diff changeset
423 digits to keep when saving data in text format.\n\
1138ced03f14 [project @ 2006-05-08 20:23:04 by jwe]
jwe
parents: 5775
diff changeset
424 @end deftypefn")
4634
79fe96966ca0 [project @ 2003-11-19 21:22:39 by jwe]
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parents:
diff changeset
425 {
5794
1138ced03f14 [project @ 2006-05-08 20:23:04 by jwe]
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diff changeset
426 return SET_INTERNAL_VARIABLE_WITH_LIMITS (save_precision, -1, INT_MAX);
4634
79fe96966ca0 [project @ 2003-11-19 21:22:39 by jwe]
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parents:
diff changeset
427 }