diff options
Diffstat (limited to 'v_windows/v/vlib/readline/readline_default.c.v')
-rw-r--r-- | v_windows/v/vlib/readline/readline_default.c.v | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/v_windows/v/vlib/readline/readline_default.c.v b/v_windows/v/vlib/readline/readline_default.c.v new file mode 100644 index 0000000..fcbbbb6 --- /dev/null +++ b/v_windows/v/vlib/readline/readline_default.c.v @@ -0,0 +1,78 @@ +// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved. +// Use of this source code is governed by an MIT license +// that can be found in the LICENSE file. +// +// TODO Mac version needs to be implemented +// Will serve as more advanced input method +// based on the work of https://github.com/AmokHuginnsson/replxx +// +module readline + +import os + +#include <termios.h> +// Only use standard os.get_line +// Need implementation for readline capabilities +// +// read_line_utf8 blocks execution in a loop and awaits user input +// characters from a terminal until `EOF` or `Enter` key is encountered +// in the input stream. +// read_line_utf8 returns the complete input line as an UTF-8 encoded `[]rune` or +// an error if the line is empty. +// The `prompt` `string` is output as a prefix text for the input capturing. +// read_line_utf8 is the main method of the `readline` module and `Readline` struct. +pub fn (mut r Readline) read_line_utf8(prompt string) ?[]rune { + r.current = []rune{} + r.cursor = 0 + r.prompt = prompt + r.search_index = 0 + if r.previous_lines.len <= 1 { + r.previous_lines << []rune{} + r.previous_lines << []rune{} + } else { + r.previous_lines[0] = []rune{} + } + print(r.prompt) + line := os.get_raw_line() + if line.len >= 0 { + r.current = line.runes() + } + r.previous_lines[0] = []rune{} + r.search_index = 0 + if r.current.len == 0 { + return error('empty line') + } + return r.current +} + +// read_line does the same as `read_line_utf8` but returns user input as a `string`. +// (As opposed to `[]rune` returned by `read_line_utf8`). +pub fn (mut r Readline) read_line(prompt string) ?string { + s := r.read_line_utf8(prompt) ? + return s.string() +} + +// read_line_utf8 blocks execution in a loop and awaits user input +// characters from a terminal until `EOF` or `Enter` key is encountered +// in the input stream. +// read_line_utf8 returns the complete input line as an UTF-8 encoded `[]rune` or +// an error if the line is empty. +// The `prompt` `string` is output as a prefix text for the input capturing. +// read_line_utf8 is the main method of the `readline` module and `Readline` struct. +// NOTE that this version of `read_line_utf8` is a standalone function without +// persistent functionalities (e.g. history). +pub fn read_line_utf8(prompt string) ?[]rune { + mut r := Readline{} + s := r.read_line_utf8(prompt) ? + return s +} + +// read_line does the same as `read_line_utf8` but returns user input as a `string`. +// (As opposed to `[]rune` as returned by `read_line_utf8`). +// NOTE that this version of `read_line` is a standalone function without +// persistent functionalities (e.g. history). +pub fn read_line(prompt string) ?string { + mut r := Readline{} + s := r.read_line(prompt) ? + return s +} |