csv_protocol — Logtalk APIs v3.47.0 documentation

protocol

# `csv_protocol`

CSV files reading and writing protocol.

Author: Jacinto Dávila
Version: 1:0:0
Date: 2021-02-03
Compilation flags:
`static`
Dependencies:
(none)
Remarks:
(none)
Inherited public predicates:
(none)

- Public predicates

  - `read_file/3`

  - `read_file/2`

  - `read_file_by_line/3`

  - `read_file_by_line/2`

  - `write_file/3`

  - `guess_separator/2`

  - `guess_arity/2`

- Protected predicates

- Private predicates

- Operators

## Public predicates

### `read_file/3`

Reads a CSV file saving the data as clauses for the specified object predicate. Fails if the file cannot be parsed.

Compilation flags:
`static`
Template:
`read_file(File,Object,Predicate)`
Mode and number of proofs:
`read_file(+atom,+object_identifier,+predicate_indicator)` - `zero_or_one`

### `read_file/2`

Reads a CSV file returning the data as a list of rows, each row a list of fields. Fails if the file cannot be parsed.

Compilation flags:
`static`
Template:
`read_file(File,Rows)`
Mode and number of proofs:
`read_file(+atom,-list(list))` - `zero_or_one`

### `read_file_by_line/3`

Reads a CSV file saving the data as clauses for the specified object predicate. The file is read line by line. Fails if the file cannot be parsed.

Compilation flags:
`static`
Template:
`read_file_by_line(File,Object,Predicate)`
Mode and number of proofs:
`read_file_by_line(+atom,+object_identifier,+predicate_indicator)` - `zero_or_one`

### `read_file_by_line/2`

Reads a CSV file returning the data as a list of rows, each row a list of fields. The file is read line by line. Fails if the file cannot be parsed.

Compilation flags:
`static`
Template:
`read_file_by_line(File,Rows)`
Mode and number of proofs:
`read_file_by_line(+atom,-list(list))` - `zero_or_one`

### `write_file/3`

Writes a CSV file with the data represented by the clauses of the specified object predicate.

Compilation flags:
`static`
Template:
`write_file(File,Object,Predicate)`
Mode and number of proofs:
`write_file(+atom,+object_identifier,+predicate_indicator)` - `one`

### `guess_separator/2`

Guesses the separator used in a given file, asking the user to confirm.

Compilation flags:
`static`
Template:
`guess_separator(File,Separator)`
Mode and number of proofs:
`guess_separator(+atom,-atom)` - `one`

### `guess_arity/2`

Guesses the arity of records in a given file, asking the user to confirm.

Compilation flags:
`static`
Template:
`guess_arity(File,Arity)`
Mode and number of proofs:
`guess_arity(+atom,-number)` - `one`

## Protected predicates

(none)

## Private predicates

(none)

## Operators

(none)