Line data Source code
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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 : class CsvParser
62 : {
63 : public:
64 : friend class EnergyPlus::InputProcessorFixture;
65 : using json = nlohmann::json;
66 :
67 3 : 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 t_delimiter = ',', int t_rows_to_skip = 0);
72 :
73 : std::vector<std::pair<std::string, bool>> const &errors();
74 :
75 : bool hasErrors();
76 :
77 : enum class Token : size_t
78 : {
79 : NONE,
80 : FILE_END,
81 : DELIMITER,
82 : LINE_END,
83 : VALUE,
84 : Num
85 : };
86 :
87 : private:
88 : bool success = false;
89 : size_t cur_line_num = 1;
90 : size_t index_into_cur_line = 0;
91 : size_t beginning_of_line_index = 0;
92 : size_t csv_size = 0;
93 : char delimiter = ',';
94 : int rows_to_skip = 0;
95 : char s[129] = {};
96 : std::vector<std::pair<std::string, bool>> errors_; // the boolean is for continuing lines
97 :
98 : static void increment_both_index(size_t &index, size_t &line_index);
99 :
100 : static void decrement_both_index(size_t &index, size_t &line_index);
101 :
102 : void skip_rows(std::string_view csv, size_t &index);
103 :
104 : int find_number_columns(std::string_view csv, size_t &index);
105 :
106 : json parse_csv(std::string_view csv, size_t &index);
107 :
108 : void parse_header(std::string_view csv, size_t &index, json &header);
109 :
110 : void parse_line(std::string_view csv, size_t &index, json &columns);
111 :
112 : json parse_value(std::string_view csv, size_t &index);
113 :
114 : // json parse_number(std::string_view csv, size_t &index);
115 :
116 : // std::string parse_string(std::string_view csv, size_t &index);
117 :
118 : Token look_ahead(std::string_view csv, size_t index);
119 :
120 : Token next_token(std::string_view csv, size_t &index);
121 :
122 : static std::string_view rtrim(std::string_view str);
123 :
124 : void eat_whitespace(std::string_view csv, size_t &index);
125 :
126 : static inline std::string convertToUpper(std::string str)
127 : {
128 : size_t len = str.size();
129 : for (size_t i = 0; i < len; ++i) {
130 : char c = str[i];
131 : str[i] = ('a' <= c && c <= 'z') ? c ^ 0x20 : c; // ASCII only, which is fine
132 : }
133 : return str;
134 : }
135 : };
136 :
137 : #endif // InputProcessing_CsvParser_hh_INCLUDED
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