1 | /**************************************************************************
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2 | *
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3 | * mg_invf_dump.cpp -- Program to dump uot an inverted fil
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4 | * Copyright (C) 1994 Neil Sharman
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5 | *
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6 | * This program is free software; you can redistribute it and/or modify
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7 | * it under the terms of the GNU General Public License as published by
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8 | * the Free Software Foundation; either version 2 of the License, or
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9 | * (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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19 | *
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20 | * $Id: mg_invf_dump.cpp 856 2000-01-14 02:26:25Z sjboddie $
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21 | *
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22 | **************************************************************************/
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23 |
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24 | #include "sysfuncs.h"
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25 |
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26 | #include "messages.h"
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27 | #include "bitio_m_stdio.h"
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28 | #include "bitio_gen.h"
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29 | #include "netorder.h" /* [RPAP - Jan 97: Endian Ordering] */
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30 |
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31 | #include "mg_files.h"
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32 | #include "locallib.h"
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33 | #include "words.h"
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34 | #include "invf.h"
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35 | #include "WordData.h"
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36 |
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37 | /*
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38 | $Log$
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39 | Revision 1.1 2000/01/14 02:26:17 sjboddie
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40 | Rodgers new C++ mg
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41 |
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42 | Revision 1.1 1999/10/11 02:57:55 cs025
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43 | Base install of MG-PP
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44 |
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45 | Revision 1.1 1999/08/10 21:18:09 sjboddie
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46 | renamed mg-1.3d directory mg
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47 |
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48 | Revision 1.2 1998/11/25 07:55:46 rjmcnab
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49 |
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50 | Modified mg to that you can specify the stemmer you want
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51 | to use via a command line option. You specify it to
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52 | mg_passes during the build process. The number of the
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53 | stemmer that you used is stored within the inverted
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54 | dictionary header and the stemmed dictionary header so
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55 | the correct stemmer is used in later stages of building
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56 | and querying.
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57 |
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58 | Revision 1.1 1998/11/17 09:35:05 rjmcnab
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59 | *** empty log message ***
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60 |
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61 | * Revision 1.3 1994/11/29 00:32:01 tes
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62 | * Committing the new merged files and changes.
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63 | *
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64 | * Revision 1.2 1994/09/20 04:41:50 tes
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65 | * For version 1.1
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66 | *
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67 | */
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68 |
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69 |
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70 | static void PrintInvfWord (FILE *invfFile,
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71 | invf_dict_header &idh,
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72 | invf_file_header &ifh,
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73 | word_dict_el &wordEl,
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74 | unsigned long wordStart) {
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75 | cout << wordEl.frag_occur << " \"" << wordEl.el << "\"\n";
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76 |
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77 | // seek to the appropriate place in the inverted file
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78 | fseek (invfFile, wordStart, SEEK_SET);
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79 |
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80 | stdio_bitio_buffer buffer(invfFile);
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81 |
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82 | unsigned long B = BIO_Bblock_Init (idh.num_frags, wordEl.frag_occur);
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83 | unsigned long fragNum = 0;
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84 | unsigned long i;
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85 | for (i=0; i<wordEl.frag_occur; i++) {
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86 | unsigned long delta = buffer.bblock_decode (B, NULL);
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87 | fragNum += delta;
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88 | cout << " " << fragNum;
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89 |
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90 | if (!ifh.word_level_index ) {
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91 | unsigned long count = buffer.gamma_decode (NULL);
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92 | cout << "(" << count << ")";
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93 | } else {
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94 | cout << "(1)";
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95 | }
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96 | }
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97 |
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98 | cout << "\n";
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99 |
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100 | buffer.done();
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101 | }
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102 |
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103 | static void PrintInvfTag (FILE *invfFile,
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104 | invf_dict_header &idh,
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105 | invf_file_header &/*ifh*/,
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106 | dict_el &tagEl,
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107 | unsigned long tagStart) {
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108 | cout << tagEl.frag_occur << " \"<" << tagEl.el << ">\"\n";
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109 |
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110 | // seek to the appropriate place in the inverted file
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111 | fseek (invfFile, tagStart, SEEK_SET);
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112 |
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113 | stdio_bitio_buffer buffer(invfFile);
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114 |
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115 | unsigned long pTag = tagEl.frag_occur*2;
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116 | unsigned long B = BIO_Bblock_Init (idh.num_frags+pTag, pTag);
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117 | unsigned long fragNum = 0;
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118 | unsigned long i;
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119 | for (i=0; i<tagEl.frag_occur; i++) {
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120 | unsigned long delta = buffer.bblock_decode (B, NULL)-1;
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121 | fragNum += delta;
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122 | cout << " " << fragNum;
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123 | cout << "-";
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124 | delta = buffer.bblock_decode (B, NULL)-1;
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125 | fragNum += delta;
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126 | cout << fragNum;
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127 | }
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128 |
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129 | cout << "\n";
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130 |
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131 | buffer.done();
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132 | }
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133 |
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134 | static void PrintHeaderInfo (invf_dict_header &idh,
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135 | invf_file_header &ifh) {
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136 | cerr << "Lookback: " << idh.lookback << "\n";
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137 | cerr << "Word Dict Size: " << idh.word_dict_size << "\n";
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138 | cerr << "Tag Dict Size: " << idh.tag_dict_size << "\n";
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139 | cerr << "Num Documents: " << idh.num_docs << "\n";
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140 | cerr << "Num Fragments: " << idh.num_frags << "\n";
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141 | cerr << "Num Words: " << idh.num_words << "\n";
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142 |
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143 | cerr << "Skip Mode: " << ifh.skip_mode << "\n";
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144 | cerr << "Word Level Index: " << ifh.word_level_index << "\n";
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145 |
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146 | cerr << "\n";
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147 | }
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148 |
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149 |
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150 | static void process_files (char *filename) {
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151 | // open the dictionary
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152 | FILE *dictFile = open_file (filename, INVF_DICT_SUFFIX, "rb",
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153 | MAGIC_STEM_BUILD, MG_ABORT);
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154 | invf_dict_header idh;
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155 | idh.Read (dictFile);
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156 |
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157 | // open the inverted file
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158 | FILE *invfFile = open_file (filename, INVF_SUFFIX, "rb",
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159 | MAGIC_INVF, MG_ABORT);
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160 |
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161 | invf_file_header ifh;
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162 | ifh.Read (invfFile);
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163 |
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164 | if (ifh.skip_mode != SKIP_MODE_NO_SKIPS)
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165 | FatalError (1, "The invf file contains skips. Unable to dump.");
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166 |
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167 | // print out header information
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168 | PrintHeaderInfo (idh, ifh);
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169 |
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170 | // open the inverted index
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171 | FILE *invfIdxFile = open_file (filename, INVF_IDX_SUFFIX, "rb",
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172 | MAGIC_INVI, MG_ABORT);
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173 |
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174 | // go to the start of the word dictionary
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175 | fseek (dictFile, idh.word_dict_start, SEEK_SET);
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176 |
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177 | // process all the words
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178 | unsigned long wordNum;
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179 | unsigned long wordStart;
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180 | word_dict_el wordEl;
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181 | wordEl.SetNumLevels (idh.num_levels);
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182 | for (wordNum=0; wordNum<idh.word_dict_size; wordNum++) {
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183 | wordEl.Read (dictFile, idh.num_levels);
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184 | ReadUL (invfIdxFile, wordStart);
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185 | PrintInvfWord (invfFile, idh, ifh, wordEl, wordStart);
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186 | }
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187 |
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188 | // process all the tags
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189 | unsigned long tagNum;
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190 | unsigned long tagStart;
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191 | dict_el tagEl;
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192 | for (tagNum=0; tagNum<idh.tag_dict_size; tagNum++) {
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193 | tagEl.Read (dictFile);
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194 | ReadUL (invfIdxFile, tagStart);
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195 | PrintInvfTag (invfFile, idh, ifh, tagEl, tagStart);
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196 | }
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197 |
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198 | // close the open files
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199 | fclose (invfIdxFile);
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200 | fclose (invfFile);
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201 | fclose (dictFile);
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202 | }
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203 |
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204 |
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205 | int main (int argc, char **argv) {
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206 | char *dir_name, *filename = "";
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207 | int ch;
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208 | msg_prefix = argv[0];
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209 | dir_name = getenv ("MGDATA");
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210 | opterr = 0;
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211 |
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212 | msg_prefix = argv[0];
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213 | while ((ch = getopt (argc, argv, "hbwtf:d:")) != -1) {
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214 | switch (ch) {
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215 | case 'f': // input file
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216 | filename = optarg;
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217 | break;
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218 | case 'd':
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219 | set_basepath(optarg);
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220 | break;
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221 | case 'h':
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222 | case '?':
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223 | fprintf (stderr, "usage: %s [-h] [-b] [-w] [-t] [-f input_file]"
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224 | "[-d data directory]\n", argv[0]);
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225 | exit (1);
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226 | }
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227 | }
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228 |
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229 | process_files (filename);
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230 |
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231 | return 0;
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232 | }
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