118 lines
2.1 KiB
Go
118 lines
2.1 KiB
Go
package string
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import (
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"regexp"
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"unicode/utf8"
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luajit "git.sharkk.net/Sky/LuaJIT-to-Go"
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)
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func GetFunctionList() map[string]luajit.GoFunction {
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return map[string]luajit.GoFunction{
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"string_slice": string_slice,
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"string_reverse": string_reverse,
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"string_length": string_length,
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"string_byte_length": string_byte_length,
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"regex_replace": regex_replace,
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"string_is_valid_utf8": string_is_valid_utf8,
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}
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}
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func string_slice(s *luajit.State) int {
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str := s.ToString(1)
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start := int(s.ToNumber(2))
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if !utf8.ValidString(str) {
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s.PushNil()
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s.PushString("invalid UTF-8")
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return 2
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}
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runes := []rune(str)
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length := len(runes)
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startIdx := start - 1 // Convert from 1-indexed
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if startIdx < 0 {
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startIdx = 0
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}
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if startIdx >= length {
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s.PushString("")
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return 1
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}
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endIdx := length
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if s.GetTop() >= 3 && !s.IsNil(3) {
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end := int(s.ToNumber(3))
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if end < 0 {
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endIdx = length + end + 1
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} else {
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endIdx = end
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}
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if endIdx < 0 {
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endIdx = 0
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}
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if endIdx > length {
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endIdx = length
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}
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}
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if startIdx >= endIdx {
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s.PushString("")
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return 1
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}
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s.PushString(string(runes[startIdx:endIdx]))
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return 1
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}
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func string_reverse(s *luajit.State) int {
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str := s.ToString(1)
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if !utf8.ValidString(str) {
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s.PushNil()
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s.PushString("invalid UTF-8")
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return 2
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}
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runes := []rune(str)
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for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
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runes[i], runes[j] = runes[j], runes[i]
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}
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s.PushString(string(runes))
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return 1
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}
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func string_length(s *luajit.State) int {
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str := s.ToString(1)
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s.PushNumber(float64(utf8.RuneCountInString(str)))
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return 1
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}
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func string_byte_length(s *luajit.State) int {
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str := s.ToString(1)
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s.PushNumber(float64(len(str)))
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return 1
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}
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func regex_replace(s *luajit.State) int {
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pattern := s.ToString(1)
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str := s.ToString(2)
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replacement := s.ToString(3)
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re, err := regexp.Compile(pattern)
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if err != nil {
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s.PushString(str)
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return 1
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}
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result := re.ReplaceAllString(str, replacement)
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s.PushString(result)
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return 1
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}
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func string_is_valid_utf8(s *luajit.State) int {
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str := s.ToString(1)
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s.PushBoolean(utf8.ValidString(str))
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return 1
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}
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