1 | #include <dawgdic/completer.h> |
2 | #include <dawgdic/dictionary.h> |
3 | #include <dawgdic/ranked-completer.h> |
4 | |
5 | #include <fstream> |
6 | #include <iostream> |
7 | #include <string> |
8 | #include <vector> |
9 | |
10 | namespace { |
11 | |
12 | class CommandOptions { |
13 | public: |
14 | CommandOptions() |
15 | : help_(false), guide_(false), ranked_(false), |
16 | dic_file_name_(), lexicon_file_name_() {} |
17 | |
18 | // Reads options. |
19 | bool help() const { |
20 | return help_; |
21 | } |
22 | bool guide() const { |
23 | return guide_; |
24 | } |
25 | bool ranked() const { |
26 | return ranked_; |
27 | } |
28 | const std::string &dic_file_name() const { |
29 | return dic_file_name_; |
30 | } |
31 | const std::string &lexicon_file_name() const { |
32 | return lexicon_file_name_; |
33 | } |
34 | |
35 | bool Parse(int argc, char *argv[]) { |
36 | for (int i = 1; i < argc; ++i) { |
37 | // Parses options. |
38 | if (argv[i][0] == '-' && argv[i][1] != '\0') { |
39 | for (int j = 1; argv[i][j] != '\0'; ++j) { |
40 | switch (argv[i][j]) { |
41 | case 'h': { |
42 | help_ = true; |
43 | break; |
44 | } |
45 | case 'g': { |
46 | guide_ = true; |
47 | break; |
48 | } |
49 | case 'r': { |
50 | ranked_ = true; |
51 | break; |
52 | } |
53 | default: { |
54 | // Invalid option. |
55 | return false; |
56 | } |
57 | } |
58 | } |
59 | } else if (dic_file_name_.empty()) { |
60 | dic_file_name_ = argv[i]; |
61 | } else if (lexicon_file_name_.empty()) { |
62 | lexicon_file_name_ = argv[i]; |
63 | } else { |
64 | // Too many arguments. |
65 | return false; |
66 | } |
67 | } |
68 | |
69 | // Uses default settings for file names. |
70 | if (dic_file_name_.empty()) { |
71 | dic_file_name_ = "-" ; |
72 | } |
73 | if (lexicon_file_name_.empty()) { |
74 | lexicon_file_name_ = "-" ; |
75 | } |
76 | return true; |
77 | } |
78 | |
79 | static void ShowUsage(std::ostream *output) { |
80 | *output << "Usage: - [Options] [DicFile] [LexiconFile]\n" |
81 | "\n" |
82 | "Options:\n" |
83 | " -h display this help and exit\n" |
84 | " -g load dictionary with guide\n" |
85 | " -r load dictionary with ranked guide\n" ; |
86 | *output << std::endl; |
87 | } |
88 | |
89 | private: |
90 | bool help_; |
91 | bool guide_; |
92 | bool ranked_; |
93 | std::string dic_file_name_; |
94 | std::string lexicon_file_name_; |
95 | |
96 | // Disallows copies. |
97 | CommandOptions(const CommandOptions &); |
98 | CommandOptions &operator=(const CommandOptions &); |
99 | }; |
100 | |
101 | // Example of finding prefix keys from each line of an input text. |
102 | void FindPrefixKeys(const dawgdic::Dictionary &dic, std::istream *input) { |
103 | std::string line; |
104 | while (std::getline(*input, line)) { |
105 | std::cout << line << ':'; |
106 | |
107 | dawgdic::BaseType index = dic.root(); |
108 | for (std::size_t i = 0; i < line.length(); ++i) { |
109 | if (!dic.Follow(line[i], &index)) { |
110 | break; |
111 | } |
112 | |
113 | // Reads a value. |
114 | if (dic.has_value(index)) { |
115 | std::cout << ' '; |
116 | std::cout.write(line.c_str(), i + 1); |
117 | std::cout << " = " << dic.value(index) << ';'; |
118 | } |
119 | } |
120 | std::cout << std::endl; |
121 | } |
122 | } |
123 | |
124 | // Example of completing ranked keys from each line of an input text. |
125 | template <typename COMPLETER_TYPE, typename GUIDE_TYPE> |
126 | void CompleteKeys(const dawgdic::Dictionary &dic, |
127 | const GUIDE_TYPE &guide, std::istream *input) { |
128 | COMPLETER_TYPE completer(dic, guide); |
129 | std::string line; |
130 | while (std::getline(*input, line)) { |
131 | std::cout << line << ':'; |
132 | |
133 | dawgdic::BaseType index = dic.root(); |
134 | if (dic.Follow(line.c_str(), line.length(), &index)) { |
135 | completer.Start(index); |
136 | while (completer.Next()) { |
137 | std::cout << ' ' << line << completer.key() |
138 | << " = " << completer.value(); |
139 | } |
140 | } |
141 | std::cout << std::endl; |
142 | } |
143 | } |
144 | |
145 | } // namespace |
146 | |
147 | int main(int argc, char *argv[]) { |
148 | CommandOptions options; |
149 | if (!options.Parse(argc, argv)) { |
150 | CommandOptions::ShowUsage(&std::cerr); |
151 | return 1; |
152 | } else if (options.help()) { |
153 | CommandOptions::ShowUsage(&std::cerr); |
154 | return 0; |
155 | } |
156 | |
157 | const std::string &dic_file_name = options.dic_file_name(); |
158 | const std::string &lexicon_file_name = options.lexicon_file_name(); |
159 | |
160 | std::istream *dic_stream = &std::cin; |
161 | std::istream *lexicon_stream = &std::cin; |
162 | |
163 | // Opens a dictionary file. |
164 | std::ifstream dic_file; |
165 | if (dic_file_name != "-" ) { |
166 | dic_file.open(dic_file_name.c_str(), std::ios::binary); |
167 | if (!dic_file) { |
168 | std::cerr << "error: failed to open DicFile: " |
169 | << dic_file_name << std::endl; |
170 | return 1; |
171 | } |
172 | dic_stream = &dic_file; |
173 | } |
174 | |
175 | // Opens a lexicon file. |
176 | std::ifstream lexicon_file; |
177 | if (lexicon_file_name != "-" ) { |
178 | lexicon_file.open(lexicon_file_name.c_str(), std::ios::binary); |
179 | if (!lexicon_file) { |
180 | std::cerr << "error: failed to open LexiconFile: " |
181 | << lexicon_file_name << std::endl; |
182 | return 1; |
183 | } |
184 | lexicon_stream = &lexicon_file; |
185 | } |
186 | |
187 | dawgdic::Dictionary dic; |
188 | if (!dic.Read(dic_stream)) { |
189 | std::cerr << "error: failed to read Dictionary" << std::endl; |
190 | return 1; |
191 | } |
192 | |
193 | if (options.ranked()) { |
194 | dawgdic::RankedGuide guide; |
195 | if (!guide.Read(dic_stream)) { |
196 | std::cerr << "error: failed to read RankedGuide" << std::endl; |
197 | return 1; |
198 | } |
199 | CompleteKeys<dawgdic::RankedCompleter>(dic, guide, lexicon_stream); |
200 | } else if (options.guide()) { |
201 | dawgdic::Guide guide; |
202 | if (!guide.Read(dic_stream)) { |
203 | std::cerr << "error: failed to read Guide" << std::endl; |
204 | return 1; |
205 | } |
206 | CompleteKeys<dawgdic::Completer>(dic, guide, lexicon_stream); |
207 | } else { |
208 | FindPrefixKeys(dic, lexicon_stream); |
209 | } |
210 | |
211 | return 0; |
212 | } |
213 | |