45 lines
1.1 KiB
V
45 lines
1.1 KiB
V
import os
|
|
import flag
|
|
|
|
pub fn read_file(file string) ?[]string {
|
|
if os.is_file(file) {
|
|
text := os.read_lines(file) or {
|
|
return error(@MOD + '.' + @STRUCT + '.' + @FN + ' Could not read "$file": "$err.msg()"')
|
|
}
|
|
return text
|
|
}
|
|
return ['']
|
|
}
|
|
|
|
pub fn extract_transitions(line string) ?string {
|
|
mut result := ' '
|
|
first_comma := line.index(',')?
|
|
second_comma := line.index_after(',', first_comma + 1)
|
|
|
|
from := line[..first_comma]
|
|
to := line[first_comma + 1..second_comma]
|
|
condition := line[second_comma + 1..]
|
|
|
|
return result + from + ' -> ' + to + ' [label=' + condition + '];'
|
|
}
|
|
|
|
pub fn get_transitions(line string) ?string {
|
|
mut raw_text := line[line.index_any('(') + 1..line.index_any(')')]
|
|
raw_text = raw_text.replace("'", '').replace(' ', '')
|
|
return extract_transitions(raw_text)
|
|
}
|
|
|
|
pub fn main() {
|
|
mut fp := flag.new_flag_parser(os.args)
|
|
file := fp.string('file', `f`, '', 'input V file with transitions to generate graph from.')
|
|
lines := read_file(file)?
|
|
println('digraph fsm {')
|
|
for line in lines {
|
|
if line.contains('add_transition') {
|
|
println(get_transitions(line)?)
|
|
}
|
|
}
|
|
|
|
println('}')
|
|
}
|