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parser.go
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parser.go
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package main
import (
"bufio"
"errors"
"io"
"log"
"regexp"
"strings"
)
const (
LINE_RE = `^(\S+\s+\S+\s+\S+\s+\S+\s+\S+)\s+(.+)$`
)
type Parser struct {
rp *regexp.Regexp
reader io.Reader
runner *Runner
}
func NewParser(reader io.Reader) (*Parser, error) {
rp, err := regexp.Compile(LINE_RE)
if err != nil {
return nil, err
}
p := &Parser{
rp: rp,
reader: reader,
runner: NewRunner(),
}
return p, nil
}
func (p *Parser) SetLogger(logger *log.Logger) {
p.runner.SetLogger(logger)
}
func (p *Parser) SetErrorLogger(errorLogger *log.Logger) {
p.runner.SetErrorLogger(errorLogger)
}
func (p *Parser) Parse() (*Runner, error) {
if err := p.parseLines(); err != nil {
return nil, err
}
return p.runner, nil
}
func (p *Parser) parseLines() error {
scanner := bufio.NewScanner(p.reader)
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text())
if strings.HasPrefix(line, "#") {
continue
}
if p.rp.MatchString(line) == true {
m := p.rp.FindStringSubmatch(line)
p.runner.Add(m[1], m[2])
}
}
if p.runner.Len() > 0 {
return nil
}
return errors.New("No parse line")
}