Wrapper for comma-separated-value (csv) files. More...
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Classes | |
| struct | col_data_t |
Variables | |
| const char * | col_data_t::value |
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| |
| typedef std::vector< col_data_t > | vec_col_t |
| vector of values provided to callback | |
| typedef void(* | csv_callback_fn )(void *context, const vec_col_t &data) |
| callback for parseCsvStream() | |
| void | parseCsvStream (std::istream &in, const VecString &columns, csv_callback_fn callback, void *context) |
| parse a stream of lines containing comma-separated values. | |
Detailed Description
Wrapper for comma-separated-value (csv) files.
This is for special files where: 1) columns are delimited by commas (duh), 2) the first row defines the column names (and column names are unique!), 3) all subsequent rows have the same number of columns
NOTE: the csv parser respects the orders of the input column names! If you specify the ordering as "A,B,C", you'll receive that order in the callback vector, even if the data is actually ordered as "C,A,B". Put another way: applications can assume that data is ordered in the callback data array in the exact same column order that was passed in to the parseCsvStream() call.
Typedef Documentation
| typedef std::vector<col_data_t> vec_col_t |
| typedef void(* csv_callback_fn)(void *context,const vec_col_t &data) |
callback for parseCsvStream()
Function Documentation
| void parseCsvStream | ( | std::istream & | in, | |
| const VecString & | columns, | |||
| csv_callback_fn | callback, | |||
| void * | context | |||
| ) |
parse a stream of lines containing comma-separated values.
The caller must provide:
- the input stream
- a vector of the desired fields they would like
- a callback routine
This routine will:
- parse the first line as column headers
- parse each remaining line as comma-separated values
- based on the header line, find the values the caller asked for
- put the values in the order the caller asked for
- call the callback with the values
Variable Documentation
const char* col_data_t::value [inherited] |
