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package escape
import "unicode/utf8"
// TODO: move to markers package?
func IsSpace(b byte) bool {
switch b {
case '\t', '\n', '\v', '\f', '\r', ' ', 0x85, 0xA0:
return true
}
return false
}
func IsDigit(b byte) bool {
switch b {
case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
return true
}
return false
}
func getPrev(chars []byte, index int) byte {
for i := index - 1; i >= 0; i-- {
if chars[i] == placeholderByte {
continue
}
return chars[i]
}
return 0
}
func getNext(chars []byte, index int) byte {
for i := index + 1; i < len(chars); i++ {
if chars[i] == placeholderByte {
continue
}
return chars[i]
}
return 0
}
func getPrevAsRune(chars []byte, index int) rune {
for i := index - 1; i >= 0; i-- {
if chars[i] == placeholderByte {
continue
}
r, _ := utf8.DecodeLastRune(chars[:i+1])
return r
}
return 0
}
func getNextAsRune(source []byte, index int) rune {
for i := index + 1; i < len(source); i++ {
if source[i] == placeholderByte {
continue
}
r, _ := utf8.DecodeRune(source[i:])
return r
}
return 0
}
// TODO: make public?
func GetNextAsRune(source []byte, index int) rune {
return getNextAsRune(source, index)
}
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