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utils.go
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utils.go
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// Package pkg provides utilities for the cli
package pkg
import (
"errors"
"os"
"regexp"
"strconv"
)
func formatFloat(val float64) string {
return strconv.FormatFloat(val, 'f', -1, 64)
}
func formatString(val string) string {
return "\"" + val + "\""
}
func formatInt(val int) string {
return strconv.FormatInt(int64(val), 10)
}
func formatUint(val uint32) string {
return strconv.FormatUint(uint64(val), 10)
}
func parseUint(val string) (uint32, error) {
res, err := strconv.ParseUint(val, 10, 32)
if err != nil {
return 0, err
}
return uint32(res), nil
}
func parseInt(val string) (int, error) {
res, err := strconv.ParseInt(val, 10, 32)
if err != nil {
return 0, err
}
return int(res), nil
}
func parseFloat(val string) (float64, error) {
return strconv.ParseFloat(val, 64)
}
type file struct {
f *os.File
}
func newFile(f *os.File) *file {
return &file{f: f}
}
func (f *file) newLine() {
_, err := f.f.WriteString("\n")
if err != nil {
panic(err)
}
}
func (f *file) print(str ...string) {
tmp := ""
for i, s := range str {
if i == 0 {
tmp += s
continue
}
if len(s) == 0 {
continue
}
if str[i-1] == "\t" {
tmp += s
continue
}
tmp += " " + s
}
_, err := f.f.WriteString(tmp + "\n")
if err != nil {
panic(err)
}
}
var errRegexNoMatch = errors.New("no match")
func applyRegex(r *regexp.Regexp, str string) ([]string, error) {
matches := r.FindAllStringSubmatch(str, -1)
if len(matches) == 0 {
return nil, errRegexNoMatch
}
return matches[0], nil
}