parse lines as dkvp

dkvp.go

package main

import (
	"fmt"
	"regexp"
	"strconv"
	"strings"
)

type DKVP map[string]string

func From(line string) DKVP {
	res := DKVP{}
	for _, pair := range strings.Split(line, ",") {
		kv := strings.SplitN(pair, "=", 2)
		if _, ok := res[kv[0]]; !ok {
			if len(kv) == 1 {
				res[kv[0]] = ""
			} else {
				res[kv[0]] = kv[1]
			}
		} else if len(kv) == 2 {
			f0, err0 := strconv.ParseFloat(kv[1], 64)
			f1, err1 := strconv.ParseFloat(res[kv[0]], 64)
			if err0 != nil || err1 != nil {
				continue
			}
			res[kv[0]] = strconv.FormatFloat(f0+f1, 'g', -1, 64)
		}
	}
	return res
}

var merge_io_re *regexp.Regexp = regexp.MustCompile("_i=|_o=")

func merge_io(line string) string {
	return merge_io_re.ReplaceAllLiteralString(line, "=")
}