annotate mde/mergetag/Reader.d @ 47:e0839643ff52

New mtcp utility and changes to paths. Changed some of mde.resource.paths and mde.mergetag.Reader's handling of resolving mergetag files, and allowed getting a list of files. Created a simple mergetag-file copy utility. Fixed mergetag's MTTReader getting array out of bounds exceptions (now throws a mergetag exception). committer: Diggory Hardy <diggory.hardy@gmail.com>
author Diggory Hardy <diggory.hardy@gmail.com>
date Fri, 23 May 2008 13:13:08 +0100
parents 611f7b9063c6
children 108d123238c0
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1 /* LICENSE BLOCK
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2 Part of mde: a Modular D game-oriented Engine
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3 Copyright © 2007-2008 Diggory Hardy
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4
26
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5 This program is free software: you can redistribute it and/or modify it under the terms
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6 of the GNU General Public License as published by the Free Software Foundation, either
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7 version 2 of the License, or (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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10 without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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11 See the GNU General Public License for more details.
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12
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13 You should have received a copy of the GNU General Public License
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14 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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16 /**************************************************************************************************
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17 * This module contains all reading functions, for both binary and text MergeTag files.
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18 *************************************************************************************************/
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19 module mde.mergetag.Reader;
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20
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21 // package imports
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22 public import mde.mergetag.iface.IReader;
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23 import mde.mergetag.DataSet;
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24 import mde.mergetag.DefaultData;
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25 import mde.mergetag.exception;
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26 import mde.mergetag.internal;
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27
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28 import tango.core.Exception;
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29
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30 // tango imports
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31 import tango.io.UnicodeFile;
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32 import Util = tango.text.Util;
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33 import ConvInt = tango.text.convert.Integer;
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34 import tango.util.collection.model.View : View;
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35 import tango.util.collection.HashSet : HashSet;
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36 import tango.util.log.Log : Log, Logger;
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37
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38 private Logger logger;
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39 static this() {
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40 logger = Log.getLogger ("mde.mergetag.Reader");
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41 }
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42
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43 // TODO: allow compressing with zlib for both binary and text? (.mtz, .mtt, .mtb extensions)
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44
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45 /** Make an IReader class.
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46 *
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47 * Create an appropriate reader: MTTReader or MTBReader.
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48 *
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49 * Throws:
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50 * $(TABLE
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51 * $(TR $(TH Exception) $(TH Thrown when))
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52 * $(TR $(TD MTFileIOException) $(TD When extension given is neither mtt nor mtb))
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53 * )
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54 *
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55 */
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56 IReader makeReader (PathView path, DataSet ds = null, bool rdHeader = false) {
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57 if (path.ext == "mtb") return new MTBReader (path, ds, rdHeader);
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58 else if (path.ext == "mtt") return new MTTReader (path, ds, rdHeader);
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59 else throw new MTFileIOException ("Invalid mergetag extension");
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60 }
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61
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62 /** Resolve a file path.
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63 *
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64 * Tries adding both ".mtt" and ".mtb" extensions, returning whichever exists (the most recently
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65 * modified if both exist), or returns null if neither exist. */
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66 PathView findFile (char[] path) {
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67 if (path is null) return null;
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68
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69 FilePath tPath = new FilePath (path ~ ".mtt");
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70 FilePath bPath = new FilePath (path ~ ".mtb");
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71
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72 bool bPathExists = bPath.exists;
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73
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74 if (tPath.exists) {
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75 if (bPathExists) {
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76 // take the latest version (roughly speaking...)
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77 return (tPath.modified > bPath.modified ? tPath : bPath);
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78 } else return tPath;
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79 } else {
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80 if (bPathExists) return bPath;
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81 else return null;
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82 }
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83 }
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84
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85 /**
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86 * Class for reading a mergetag text file.
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87 *
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88 * Use as:
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89 * -----------------------
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90 * IReader foo;
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91 * try {
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92 * foo = new MTTReader("foo.mtt");
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93 * foo.read();
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94 * }
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95 * catch (MTException) {}
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96 * // get your data from foo.dataset.
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97 * -----------------------
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98 *
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99 * Throws:
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100 * $(TABLE
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101 * $(TR $(TH Exception) $(TH Thrown when))
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102 * $(TR $(TD MTFileIOException) $(TD An error occurs while opening the file))
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103 * $(TR $(TD MTFileFormatException) $(TD The file doesn't start with a recognised header/version))
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104 * $(TR $(TD MTSyntaxException) $(TD A file syntax error occurs))
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105 * $(TR $(TD MTException) $(TD An unexpected error occurs))
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106 * )
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107 * Note that all exceptions extend MTException and when any exception is thrown the class is
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108 * rendered unusable: any subsequent calls to read will be ignored.
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109 *
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110 * Threading: Separate instances of Reader should be thread-safe provided access to the same
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111 * dataset is synchronized; i.e. no two readers refering to the same dataset should run
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112 * simultaneously. (The Reader class could be made thread-safe w.r.t. datasets, but
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113 * performance-wise I doubt it would be worth it.)
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114 * Do not run a single instance of Reader in multiple threads simultaneously.
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115 */
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116 class MTTReader : IReader
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117 {
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118 //BEGIN DATA
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119 /** Get or set the DataSet
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120 *
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121 * A container for all read data.
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122 *
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123 * This may be accessed from here; however it may be preferable to use an external reference
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124 * (passed to the class on initialisation).
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125 */
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126 DataSet dataset () { return _dataset; }
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127 void dataset (DataSet ds) /// ditto
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128 { _dataset = ds; }
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129
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130 /** A delegate for creating new DataSections within the dataset.
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131 *
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132 * Allows a user-made class to be used in the DataSet instead of DefaultData (used if no
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133 * dataSecCreator exists). Also allows an existing class instance to be used instead of a new
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134 * one.
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135 *
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136 * This works by supplying a function which returns a reference to an instance of a class
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137 * implementing IDataSection. The function is passed the ID of the new section and may use this
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138 * to use different IDataSection classes for different sections.
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139 *
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140 * The function may also return null, in which case the section will be skipped. In the version
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141 * of read taking a set of sections to read, the section will not be marked as read and may
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142 * still be read later (assuming dataSecCreator returns non-null). However, in the version of
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143 * read not taking the set argument, all sections are set as read regardless, and the section
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144 * cannot be read later.
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145 */
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146 void dataSecCreator (IDataSection delegate (ID) dSC) {
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147 _dataSecCreator = dSC;
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148 }
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149
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150 private:
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151 static Logger logger;
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152
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153 // Non-static symbols:
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154 final char[] ErrFile; // added after ErrInFile to do the same without the "in " bit.
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155 final char[] ErrInFile; // something like "in \"path/file.mtt\""
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156
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157 final char[] fbuf; // file is read into this
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158 MTFormatVersion.VERS fileVer = MTFormatVersion.VERS.INVALID; // Remains INVALID until set otherwise by CTOR.
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159
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160 IDataSection delegate (ID) _dataSecCreator = null; // see property setter above
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161
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162 size_t endOfHeader;
14
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163 bool allRead = false; // true if endOfHeader == fbuf.length or read([]) has run
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164 bool fatal = false; // a fatal file error occured; don't try to recover
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165 /* If the file is scanned for sections, the starting position of all sections are stored
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166 * in secTable. If this is empty, either no sections exist (and endOfHeader == fbuf.length)
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167 * or a section scan has not been run (read() with no section names doesn't need to do so).
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168 */
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169 struct SecMD { // sec meta data
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170 static SecMD opCall (size_t _pos, bool _read) {
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171 SecMD ret;
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172 ret.pos = _pos;
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173 ret.read = _read;
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174 return ret;
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175 }
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176 size_t pos; // position to start reading
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177 bool read; // true if already read
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178 }
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179 SecMD [ID] secTable;
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180
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181 DataSet _dataset;
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182 //END DATA
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183
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184 //BEGIN METHODS: CTOR / DTOR
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185 static this () {
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186 logger = Log.getLogger ("mde.mergetag.read.Reader");
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187 }
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188
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189 /** Tries to open file path and read it into a buffer.
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190 *
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191 * Params:
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192 * path = The name or FilePath of the file to open.
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193 * Standard extensions are .mtt and .mtb for text and binary files respectively.
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194 * ds = If null create a new DataSet, else use existing DataSet ds and merge read
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195 * data into it.
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196 * rdHeader = If true, read the header like a standard section. Doesn't read the header by
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197 * default since if it's not requested it's likely not wanted.
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198 *
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199 * Memory:
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200 * This currently works by loading the whole file into memory at once. This should be fine most
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201 * of the time, but could potentially be a problem. Changing this would mean significantly
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202 * changes to the way the code works.
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203 */
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204 /* Ideas for implementing a partial-loading memory model:
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205 * Use a conduit directly.
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206 * Use a fiber to do the parsing; let it switch back when it runs out of memory.
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207 * Redesign the code so it never needs to look backwards in the buffer?
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208 *
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209 * Major problem: reading only some sections and keeping references to other sections
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210 * would no longer be possible.
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211 */
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212 public this (char[] path, DataSet ds = null, bool rdHeader = false) {
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213 this (new FilePath (path), ds, rdHeader);
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214 }
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215 /** ditto */
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216 public this (PathView path, DataSet ds = null, bool rdHeader = false) {
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217 // Create a dataset or use an existing one
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218 if (ds !is null) _dataset = ds;
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219 else _dataset = new DataSet();
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220
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221 // Open & read the file
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222 try { // Supports unicode files with a BOM; defaults to UTF8 when there isn't a BOM:
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223 scope file = new UnicodeFile!(char) (path, Encoding.Unknown);
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224 fbuf = cast(char[]) file.read();
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225 } catch (Exception e) {
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226 throwMTErr ("Error reading file: " ~ e.msg, new MTFileIOException);
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227 }
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228 // Remember the file name so that we can report errors (somewhat) informatively:
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229 ErrFile = path.path ~ path.file;
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230 ErrInFile = " in \"" ~ ErrFile ~ '"';
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32eff0e01c05 Only locally-changed options are stored in user-config now. Log levels revised.
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231
14
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232 // Version checking & matching header section tag:
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233 if (fbuf.length < 6 || fbuf[0] != '{' || fbuf[1] != 'M' || fbuf[2] != 'T' || fbuf[5] != '}')
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234 throwMTErr("Not a valid MergeTag text file" ~ ErrInFile, new MTFileFormatException);
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235 fileVer = MTFormatVersion.parseString (fbuf[3..5]);
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236 if (fileVer == MTFormatVersion.VERS.INVALID)
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237 throwMTErr("Unrecognised MergeTag version: MT" ~ fbuf[3..5] ~ ErrInFile, new MTFileFormatException);
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238
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239 // Header reading/skipping:
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240 if (rdHeader) { // only bother actually reading it if it was requested
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241 // If already existing, merge; else create a new DefaultData.
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242 if (!_dataset.header) _dataset.header = new DefaultData;
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243 endOfHeader = parseSection (6, cast(IDataSection) _dataset.header);
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244 }
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245 else endOfHeader = parseSection (6,null);
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246 }
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247 //END METHODS: CTOR / DTOR
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248
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249 //BEGIN METHODS: PUBLIC
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250 /** Scans for sections if not already done and returns a list of IDs.
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251 *
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252 * Won't work (will return an empty array) if all sections have already been read without
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253 * scanning for sections.
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254 */
15
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255 public ID[] getSectionNames () {
14
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256 if (fatal) return [];
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257 if (!secTable.length) read([]); // scan for sections
15
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258 return secTable.keys;
14
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259 }
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260
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261 /** Reads (some) sections of the file into data. Note that sections will never be _read twice.
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262 *
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263 * To be more accurate, the file is copied into a buffer by this(). read() then parses the
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264 * contents of this buffer, and stores the contents in dataset.
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265 *
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266 * Each section read is stored in a DataSection class. By default this is an instance of
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267 * DefaultData; this can be customised (see dataSecCreator).
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268 *
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269 * If secSet is provided, reading is restricted to sections given in secSet, otherwise all
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270 * sections are read. Sections given in secSet but not found in the file are not reported as an
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271 * error. Suggested: supply a HashSet!(uint) as the View!(ID). An ArrayBag!(ID) as used is not a
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272 * good choice, except that in this case it's empty.
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273 *
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Diggory Hardy <diggory.hardy@gmail.com>
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274 * Merging:
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275 * Where a section already exists in the DataSet (when either the section is given more than
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276 * once in the file, or it was read from a different file by another reader) it is merged.
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277 * Entries already in the DataSet take priority.
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278 *
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279 * Performance:
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280 * Note that loading only desired sections like this still parses the sections not
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Diggory Hardy <diggory.hardy@gmail.com>
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281 * read (although it does not try to understand the type or data fields), so there is only a
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Diggory Hardy <diggory.hardy@gmail.com>
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282 * small performance advantage to this where other sections do exist in the file. There is also
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Diggory Hardy <diggory.hardy@gmail.com>
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283 * some overhead in only partially reading the file to keep track of where other sections are so
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284 * that the entire file need not be re-read if further (or all remaining) sections are read
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Diggory Hardy <diggory.hardy@gmail.com>
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285 * later.
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286 */
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287 public void read () {
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288 if (secTable.length) {
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289 foreach (ID id, ref SecMD smd; secTable) {
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290 if (!smd.read) {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
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291 IDataSection ds = getOrCreateSec (id);
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292 parseSection (smd.pos, ds);
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293 // allRead is set true so there's no point setting smd.read = true
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294 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
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295 }
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296 } else { // this time we don't need to use secTable
47
e0839643ff52 New mtcp utility and changes to paths.
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297 for (size_t pos = endOfHeader; pos < fbuf.length;) {
14
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298 ID id = fbufReadSecMarker (pos);
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299 IDataSection ds = getOrCreateSec (id);
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300 pos = parseSection (pos, ds);
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301 }
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302 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
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303
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304 allRead = true;
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Diggory Hardy <diggory.hardy@gmail.com>
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305 }
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Diggory Hardy <diggory.hardy@gmail.com>
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306 /** ditto */
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Diggory Hardy <diggory.hardy@gmail.com>
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307 public void read (ID[] secSet) {
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308 HashSet!(ID) hs = new HashSet!(ID);
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309 foreach (id; secSet) hs.add(id);
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310 read (hs);
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311 }
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Diggory Hardy <diggory.hardy@gmail.com>
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312 /** ditto */
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Diggory Hardy <diggory.hardy@gmail.com>
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313 public void read (View!(ID) secSet) {
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314 if (allRead || fatal) return; // never do anything in either case
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315
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Diggory Hardy <diggory.hardy@gmail.com>
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316 if (secTable.length) {
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Diggory Hardy <diggory.hardy@gmail.com>
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317 foreach (ID id; secSet) {
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318 SecMD* psmd = id in secTable;
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Diggory Hardy <diggory.hardy@gmail.com>
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319 if (psmd && !psmd.read) { // may not exist
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
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320 IDataSection ds = getOrCreateSec (id);
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parents:
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321 parseSection (psmd.pos, ds);
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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322 if (ds !is null) psmd.read = true; // getOrCreateSec may return null
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Diggory Hardy <diggory.hardy@gmail.com>
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323 }
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Diggory Hardy <diggory.hardy@gmail.com>
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324 }
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325 } else {
47
e0839643ff52 New mtcp utility and changes to paths.
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parents: 26
diff changeset
326 for (size_t pos = endOfHeader; pos < fbuf.length;) {
14
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parents:
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327 ID id = fbufReadSecMarker (pos);
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Diggory Hardy <diggory.hardy@gmail.com>
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328 secTable[id] = SecMD(pos,false); // add to table
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Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
329 if (secSet.contains(id)) {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
330 IDataSection ds = getOrCreateSec (id);
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331 pos = parseSection (pos, ds);
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
332 if (ds !is null) secTable[id].read = true;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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333 } else {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
334 pos = parseSection (pos, null); // skip section
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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335 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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336 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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337 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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338 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
339 //END METHODS: PUBLIC
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
340
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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341 //BEGIN METHODS: PRIVATE
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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342 /* Utility function for read
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
343 * Look for a section; return it if it exists otherwise create a new section:
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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344 * use _dataSecCreator if it exists or just create a DefaultData if not.
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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345 * However if _dataSecCreator returns null don't add it to the dataset.
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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346 */
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
347 private IDataSection getOrCreateSec (ID id) {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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348 IDataSection* i = id in _dataset.sec;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
349 if (i) return *i;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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350 else {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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351 IDataSection s;
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
352 if (_dataSecCreator !is null) s = _dataSecCreator(id);
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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353 else s = new DefaultData;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
354 if (s !is null) _dataset.sec[id] = s;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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355 return s;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
356 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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357 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
358
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
359 /* Reads a section, starting from index pos, finishing at the next section marker (returning
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
360 the position of the start of the marker). pos should start after the section marker.
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
361
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
362 After analysing tags, the function passes the type, ID and data to addTag.
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
363
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
364 NOTE: from performance tests on indexing char[]'s and dereferencing char*'s, the char*'s are
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
365 slightly faster, but a tiny difference isn't worth the extra effort/risk of using char*'s.
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
366 */
47
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
367 private size_t parseSection (size_t pos, IDataSection dsec) {
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
368 debug scope (failure)
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
369 logger.trace ("MTTReader.parseSection: failure");
14
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
370 /* Searches fbuf starting from start to find one of <=>| and stops at its index.
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
371
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
372 If quotable then be quote-aware for single and double quotes.
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
373 Note: there's no length restriction for the content of the quote since it could be a single
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
374 non-ascii UTF-8 char which would look like several chars.
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
375 */
47
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
376 void fbufLocateDataTagChar (ref size_t pos, bool quotable) {
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
377 while (true) {
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
378 fbufIncrement (pos);
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
379
14
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
380 if ((fbuf[pos] >= '<' && fbuf[pos] <= '>') || fbuf[pos] == '|') return;
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
381 else if (quotable) {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
382 char c = fbuf[pos];
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
383 if (c == '\'' || c == '"') {
47
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
384 fbufIncrement(pos);
14
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
385 while (fbuf[pos] != c) {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
386 if (fbuf[pos] == '\\') ++pos; // escape seq.
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
387 fbufIncrement(pos);
47
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
388 }
14
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
389 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
390 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
391 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
392 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
393
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
394 // Used to ignore a tag (if it starts !< or !{ or should otherwise be ignored):
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
395 bool comment = false;
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
396 for (; pos < fbuf.length; ++pos) {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
397 if (Util.isSpace(fbuf[pos])) continue; // whitespace
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
398 else if (fbuf[pos] == '<') { // data tag
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
399 char[] ErrDTAG = "Bad data tag format: not <type|id=data>" ~ ErrInFile;
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
400
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
401 // Type section of tag:
47
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
402 size_t pos_s = pos + 1;
14
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
403 fbufLocateDataTagChar (pos, false); // find end of type section
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
404 if (fbuf[pos] != '|') throwMTErr (ErrDTAG, new MTSyntaxException);
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
405 char[] type = fbuf[pos_s..pos];
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
406
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
407 // ID section of tag:
47
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
408 pos_s = pos + 1;
14
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
409 fbufLocateDataTagChar (pos, false); // find end of type section
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
410 if (fbuf[pos] != '=') throwMTErr (ErrDTAG, new MTSyntaxException);
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
411 ID tagID = cast(ID) fbuf[pos_s..pos];
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
412
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
413 // Data section of tag:
47
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
414 pos_s = pos + 1;
14
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
415 fbufLocateDataTagChar (pos, true); // find end of data section
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
416 if (fbuf[pos] != '>') throwMTErr (ErrDTAG, new MTSyntaxException);
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
417 char[] data = fbuf[pos_s..pos];
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
418
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
419 if (!comment && dsec !is null) {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
420 type = Util.trim(type);
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
421 try {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
422 dsec.addTag (type, tagID, data);
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
423 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
424 catch (TextException e) {
24
32eff0e01c05 Only locally-changed options are stored in user-config now. Log levels revised.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 17
diff changeset
425 logger.error ("TextException while reading " ~ ErrFile ~ ":"); // following a parse error
32eff0e01c05 Only locally-changed options are stored in user-config now. Log levels revised.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 17
diff changeset
426 logger.error (e.msg);
47
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
427 // No throw: tag is just ignored
14
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
428 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
429 catch (Exception e) {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
430 logger.error ("Unknown error occured" ~ ErrInFile ~ ':');
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
431 logger.error (e.msg);
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
432 throwMTErr (e.msg); // Fatal to Reader
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
433 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
434 } else comment = false; // cancel comment status now
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
435 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
436 else if (fbuf[pos] == '{') {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
437 if (comment) { // simple block comment
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
438 uint depth = 0; // depth of embedded comment blocks
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
439 while (true) {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
440 fbufIncrement (pos);
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
441 if (fbuf[pos] == '}') {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
442 if (depth == 0) break;
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
443 else --depth;
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
444 } else if (fbuf[pos] == '{')
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
445 ++depth;
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
446 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
447 comment = false; // end of this comment
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
448 } else {
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
449 return pos; // next section coming up; we are done
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
450 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
451 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
452 else if (fbuf[pos] == '!') { // possibly a comment; check next char
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
453 comment = true; // starting a comment (or an error)
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
454 // variable is reset at end of comment
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
455 } else // must be an error
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
456 throwMTErr ("Invalid character (or sequence starting \"!\") outside of tag" ~ ErrInFile, new MTSyntaxException);
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
457 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
458 // if code execution reaches here, we're at EOF
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
459 // possible error: last character was ! (but don't bother checking since it's inconsequential)
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
460 return pos;
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
461 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
462
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
463 /* Parses fbuf for a section marker. Already knows fbuf[pos] == '{'.
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
464 */
47
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
465 private ID fbufReadSecMarker (ref size_t pos) {
14
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
466 // at this point pos is whatever a parseSection run returned
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
467 // since we haven't hit EOF, fbuf[pos] MUST be '{' so no need to check
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
468 fbufIncrement(pos);
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
469
47
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
470 size_t start = pos;
14
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
471 for (; pos < fbuf.length; ++pos)
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
472 if (fbuf[pos] == '}' || fbuf[pos] == '{') break;
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
473
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
474 if (pos >= fbuf.length || fbuf[pos] != '}')
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
475 throwMTErr ("Bad section tag format: not {id}" ~ ErrInFile, new MTSyntaxException);
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
476
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
477 ID id = cast(ID) fbuf[start..pos];
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
478 fbufIncrement(pos);
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
479 return id;
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
480 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
481
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
482 /* Increments pos and checks it hasn't hit fbuf.length . */
47
e0839643ff52 New mtcp utility and changes to paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 26
diff changeset
483 private void fbufIncrement(ref size_t pos) {
14
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
484 ++pos;
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
485 if (pos >= fbuf.length) throwMTErr("Unexpected EOF" ~ ErrInFile, new MTSyntaxException);
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
486 }
0047b364b6d9 Changed much of the mergetag structure and some functionality. First tests on windows.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
487
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488 private void throwMTErr (char[] msg, MTException exc = new MTException) {
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489 fatal = true; // if anyone catches the error and tries to do anything --- we're dead now
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490 logger.error (msg); // report the error
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491 throw exc; // and signal our error
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492 }
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493 //END METHODS: PRIVATE
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494 }
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495
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496
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497 /**
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498 * Class for reading a mergetag text file.
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499 *
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500 * Currently only a dummy class: a MTNotImplementedException will be thrown if created.
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501 */
14
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502 class MTBReader : IReader
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503 {
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504 public this (char[] path, DataSet ds = null, bool rdHeader = false) {
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505 this (new FilePath (path), ds, rdHeader);
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506 }
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507 public this (PathView path, DataSet ds = null, bool rdHeader = false) {
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508 throw new MTNotImplementedException;
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509 }
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510
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511 DataSet dataset () { /// Get the DataSet
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512 return null;
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513 }
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514 void dataset (DataSet) {} /// Set the DataSet
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515
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516 void dataSecCreator (IDataSection delegate (ID)) {} /// Set the dataSecCreator
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517
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518 ID[] getSectionNames () { /// Get identifiers for all sections
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519 return [];
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520 }
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521 void read () {} /// Commence reading
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522 void read (ID[] secSet) {} /// ditto
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523 void read (View!(ID) secSet) {} /// ditto
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524 }