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Adjustment for alphanumeric CNPJ validation. Resolves #29 #30

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Merged
paemuri merged 1 commit into from
Jun 21, 2025
Merged

Adjustment for alphanumeric CNPJ validation. Resolves #29 #30

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3 changes: 1 addition & 2 deletions cpfcnpj.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,6 @@ import (
"bytes"
"regexp"
"strconv"
"unicode"
)

// "Cadastro" will be used internally to define both CPF and CNPJ.
Expand Down Expand Up @@ -85,7 +84,7 @@ func calcCadastroDigit(doc string, position int) string {
func cleanCadastro(doc *string) {
buf := bytes.NewBufferString("")
for _, r := range *doc {
if unicode.IsDigit(r) || unicode.IsLetter(r) {
if isDigit(r) || ('A' <= r && r <= 'Z') {
buf.WriteRune(r)
}
}
Expand Down
3 changes: 1 addition & 2 deletions rg.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,6 @@ import (
"bytes"
"errors"
"regexp"
"unicode"
)

var (
Expand Down Expand Up @@ -60,7 +59,7 @@ func calcRGDigit(doc string) int {
func cleanRG(doc *string) {
buf := bytes.NewBufferString("")
for _, r := range *doc {
if unicode.IsDigit(r) || r == 'X' || r == 'x' {
if isDigit(r) || r == 'X' || r == 'x' {
buf.WriteRune(r)
}
}
Expand Down
11 changes: 8 additions & 3 deletions util.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2,13 +2,12 @@ package brdoc

import (
"bytes"
"unicode"
)

// allDigit checks if every rune in a given string is a digit.
func allDigit(doc string) bool {
for _, r := range doc {
if !unicode.IsDigit(r) {
if !isDigit(r) {
return false
}
}
Expand All @@ -25,7 +24,7 @@ func toInt(r rune) int {
func cleanNonDigits(doc *string) {
buf := bytes.NewBufferString("")
for _, r := range *doc {
if unicode.IsDigit(r) {
if isDigit(r) {
buf.WriteRune(r)
}
}
Expand Down Expand Up @@ -57,3 +56,9 @@ func isFrom(uf UF, ufs []UF) bool {
}
return false
}

// isDigit is a simpler version of unicode.IsDigit: verifies whether a rune is
// a single digit number.
func isDigit(r rune) bool {
return '0' <= r && r <= '9'
}