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package kv
import (
"strconv"
"codeberg.org/gruf/go-byteutil"
"codeberg.org/gruf/go-kv/format"
)
// appendQuoteKey will append and escape/quote a formatted key string.
func appendQuoteKey(buf *byteutil.Buffer, str string) {
switch {
case !strconv.CanBackquote(str):
// Append quoted and escaped string
buf.B = strconv.AppendQuote(buf.B, str)
case format.ContainsDoubleQuote(str):
// Double quote and escape string
buf.B = append(buf.B, '"')
buf.B = format.AppendEscape(buf.B, str)
buf.B = append(buf.B, '"')
case len(str) < 1 || format.ContainsSpaceOrTab(str):
// Double quote this string as-is
buf.WriteString(`"` + str + `"`)
default:
// Append string as-is
buf.WriteString(str)
}
}
// appendQuoteValue will append and escape/quote a formatted value string.
func appendQuoteValue(buf *byteutil.Buffer, str string) {
switch {
case !strconv.CanBackquote(str):
// Append quoted and escaped string
buf.B = strconv.AppendQuote(buf.B, str)
return
case !doubleQuoted(str):
if format.ContainsDoubleQuote(str) {
// Double quote and escape string
buf.B = append(buf.B, '"')
buf.B = format.AppendEscape(buf.B, str)
buf.B = append(buf.B, '"')
return
} else if format.ContainsSpaceOrTab(str) {
// Double quote this string as-is
buf.WriteString(`"` + str + `"`)
return
}
}
// Append string as-is
buf.WriteString(str)
}
// doubleQuoted will return whether 'str' is double quoted.
func doubleQuoted(str string) bool {
if len(str) < 2 ||
str[0] != '"' || str[len(str)-1] != '"' {
return false
}
var delim bool
for i := len(str) - 2; i >= 0; i-- {
switch str[i] {
case '\\':
delim = !delim
default:
return !delim
}
}
return !delim
}
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