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119 lines
1.9 KiB

package base
import (
"math/rand"
"strings"
"lib"
)
func uniqueChar(s string) bool {
m := map[rune]struct{}{}
for _, r := range s {
if _, ok := m[r]; ok {
return false
}
m[r] = struct{}{}
}
return true
}
func IsValid(base string) bool {
return len(base) >= 2 && !strings.ContainsAny(base, "+-") && uniqueChar(base)
}
func power(nbr int, pwr int) int {
if pwr == 0 {
return 1
}
if pwr == 1 {
return nbr
}
return nbr * power(nbr, pwr-1)
}
func Atoi(s string, base string) int {
var result int
var i int
sign := 1
lengthBase := len(base)
lengths := len(s)
if !IsValid(base) {
return 0
}
if s[i] == '-' {
sign = -1
}
if s[i] == '-' || s[i] == '+' {
i++
}
for i < len(s) {
result += strings.Index(base, string(s[i])) * power(lengthBase, lengths-1)
i++
lengths--
}
return result * sign
}
func Valid() string {
valid := []string{
"01",
"CHOUMIisDAcat!",
"choumi",
"0123456789",
"abc",
"Zone01",
"0123456789ABCDEF",
"WhoAmI?",
}
i := rand.Intn(len(valid))
return valid[i]
}
func Invalid() string {
invalid := []string{
"0",
"1",
"CHOUMIisdacat!",
"choumiChoumi",
"01234567890",
"abca",
"Zone01Zone01",
"0123456789ABCDEF0",
"WhoAmI?IamWhoIam",
}
i := rand.Intn(len(invalid))
return invalid[i]
}
func StringFrom(base string) string {
letters := []rune(base)
size := lib.RandIntBetween(1, 10)
runes := make([]rune, size)
for i := range runes {
runes[i] = letters[rand.Intn(len(letters))]
}
return string(runes)
}
func ConvertNbr(n int, base string) string {
var result string
length := len(base)
for n >= length {
result = string(base[(n%length)]) + result
n = n / length
}
result = string(base[n]) + result
return result
}
func Convert(nbr, baseFrom, baseTo string) string {
resultIntermediary := Atoi(nbr, baseFrom)
resultFinal := ConvertNbr(resultIntermediary, baseTo)
return resultFinal
}