Line data Source code
1 : // EnergyPlus, Copyright (c) 1996-2023, The Board of Trustees of the University of Illinois,
2 : // The Regents of the University of California, through Lawrence Berkeley National Laboratory
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47 :
48 : #ifndef InputProcessing_CsvParser_hh_INCLUDED
49 : #define InputProcessing_CsvParser_hh_INCLUDED
50 :
51 : #include <string>
52 : #include <string_view>
53 :
54 : #include <nlohmann/json.hpp>
55 : #include <unordered_map>
56 :
57 : namespace EnergyPlus {
58 : class InputProcessorFixture;
59 : }
60 :
61 10 : class CsvParser
62 : {
63 : public:
64 : friend class EnergyPlus::InputProcessorFixture;
65 : using json = nlohmann::json;
66 :
67 10 : CsvParser() = default;
68 :
69 : // Skipping 1 row is assumed to be the header row and will be recorded as such.
70 : // Otherwise, if rows_to_skip == 0 or >1 then there will be no header
71 : json decode(std::string_view csv, char delimiter = ',', int rows_to_skip = 0);
72 :
73 : json decode(std::string_view csv, bool &success, char delimiter = ',', int rows_to_skip = 0);
74 :
75 : json decode(std::string_view csv, size_t csv_size, char delimiter = ',', int rows_to_skip = 0);
76 :
77 : json decode(std::string_view csv, size_t csv_size, bool &success, char delimiter = ',', int rows_to_skip = 0);
78 :
79 : std::string encode(json const &root);
80 :
81 : std::vector<std::string> const &errors();
82 :
83 : std::vector<std::string> const &warnings();
84 :
85 : bool hasErrors();
86 :
87 : enum class Token : size_t
88 : {
89 : NONE,
90 : FILE_END,
91 : DELIMITER,
92 : LINE_END,
93 : VALUE,
94 : Num
95 : };
96 :
97 : private:
98 : size_t cur_line_num = 1;
99 : size_t index_into_cur_line = 0;
100 : size_t beginning_of_line_index = 0;
101 : size_t csv_size = 0;
102 : char delimiter = ',';
103 : int rows_to_skip = 0;
104 : char s[129] = {};
105 : std::vector<std::string> errors_;
106 : std::vector<std::string> warnings_;
107 :
108 : static void increment_both_index(size_t &index, size_t &line_index);
109 :
110 : static void decrement_both_index(size_t &index, size_t &line_index);
111 :
112 : void skip_rows(std::string_view csv, size_t &index);
113 :
114 : int find_number_columns(std::string_view csv, size_t &index);
115 :
116 : json parse_csv(std::string_view csv, size_t &index, bool &success);
117 :
118 : void parse_header(std::string_view csv, size_t &index, bool &success, json &header);
119 :
120 : void parse_line(std::string_view csv, size_t &index, json &columns);
121 :
122 : json parse_value(std::string_view csv, size_t &index);
123 :
124 : // json parse_number(std::string_view csv, size_t &index);
125 :
126 : // std::string parse_string(std::string_view csv, size_t &index);
127 :
128 : Token look_ahead(std::string_view csv, size_t index);
129 :
130 : Token next_token(std::string_view csv, size_t &index);
131 :
132 : static std::string_view rtrim(std::string_view str);
133 :
134 : void eat_whitespace(std::string_view csv, size_t &index);
135 :
136 : static inline std::string convertToUpper(std::string str)
137 : {
138 : size_t len = str.size();
139 : for (size_t i = 0; i < len; ++i) {
140 : char c = str[i];
141 : str[i] = ('a' <= c && c <= 'z') ? c ^ 0x20 : c; // ASCII only, which is fine
142 : }
143 : return str;
144 : }
145 : };
146 :
147 : #endif // InputProcessing_CsvParser_hh_INCLUDED
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