mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
927 lines
20 KiB
V
927 lines
20 KiB
V
module builtin
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pub struct string {
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pub:
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str JS.String
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len int
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}
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pub fn (s string) runes() []rune {
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mut runes := []rune{}
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for i := 0; i < s.len; i++ {
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mut r := rune(`0`)
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#r = new rune(s.str[i.val].charCodeAt())
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runes << r
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}
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return runes
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}
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pub fn (s string) slice(a int, b int) string {
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return string(s.str.slice(a, b))
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}
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pub fn (s string) substr(start int, end int) string {
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return s.slice(start, end)
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}
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pub fn (s string) after(dot string) string {
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return string(s.str.slice(s.str.lastIndexOf(dot.str) + 1, int(s.str.length)))
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}
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pub fn (s string) after_char(dot byte) string {
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// TODO: Implement after byte
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return s
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}
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pub fn (s string) all_after(dot string) string {
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pos := if dot.len == 0 { -1 } else { s.str.indexOf(dot.str) }
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if pos == -1 {
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return s.clone()
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}
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return s[pos + dot.len..]
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}
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// why does this exist?
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pub fn (s string) all_after_last(dot string) string {
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pos := if dot.len == 0 { -1 } else { s.str.lastIndexOf(dot.str) }
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if pos == -1 {
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return s.clone()
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}
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return s[pos + dot.len..]
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}
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pub fn (s string) all_before(dot string) string {
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pos := if dot.len == 0 { -1 } else { s.str.indexOf(dot.str) }
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if pos == -1 {
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return s.clone()
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}
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return s[..pos]
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// return string(s.str.slice(0, s.str.indexOf(dot.str)))
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}
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pub fn (s string) all_before_last(dot string) string {
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pos := if dot.len == 0 { -1 } else { s.str.lastIndexOf(dot.str) }
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if pos == -1 {
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return s.clone()
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}
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return s[..pos]
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}
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pub fn (s string) bool() bool {
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return s == 'true'
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}
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pub fn (s string) split(dot string) []string {
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mut arr := s.str.split(dot.str).map(string(it))
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#arr = new array(new array_buffer({arr,index_start: new int(0),len: new int(arr.length)}))
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return arr
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}
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pub fn (s string) bytes() []byte {
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sep := ''
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mut arr := s.str.split(sep.str).map(it.charCodeAt(0))
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#arr = new array(new array_buffer({arr,index_start: new int(0),len: new int(arr.length)}))
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return arr
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}
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pub fn (s string) capitalize() string {
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part := string(s.str.slice(1, int(s.str.length)))
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return string(s.str.charAt(0).toUpperCase().concat(part.str))
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}
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pub fn (s string) clone() string {
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return string(s.str)
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}
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pub fn (s string) contains(substr string) bool {
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return s.str.includes(substr.str)
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}
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pub fn (s string) contains_any(chars string) bool {
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sep := ''
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for x in chars.str.split(sep.str) {
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if s.str.includes(x) {
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return true
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}
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}
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return false
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}
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pub fn (s string) contains_any_substr(chars []string) bool {
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if chars.len == 0 {
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return true
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}
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for x in chars {
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if s.str.includes(x.str) {
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return true
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}
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}
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return false
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}
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pub fn (s string) count(substr string) int {
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// TODO: "error: `[]JS.String` is not a struct" when returning arr.length or arr.len
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arr := s.str.split(substr.str)
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return native_str_arr_len(arr)
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}
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pub fn (s string) ends_with(p string) bool {
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mut res := false
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#res.val = s.str.endsWith(p.str)
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return res
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}
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pub fn (s string) starts_with(p string) bool {
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return s.str.startsWith(p.str)
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}
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pub fn (s string) fields() []string {
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mut res := []string{}
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mut word_start := 0
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mut word_len := 0
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mut is_in_word := false
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mut is_space := false
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for i, c in s {
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is_space = c in [32, 9, 10]
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if !is_space {
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word_len++
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}
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if !is_in_word && !is_space {
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word_start = i
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is_in_word = true
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continue
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}
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if is_space && is_in_word {
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res << s[word_start..word_start + word_len]
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is_in_word = false
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word_len = 0
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word_start = 0
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continue
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}
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}
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if is_in_word && word_len > 0 {
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// collect the remainder word at the end
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res << s[word_start..s.len]
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}
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return res
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}
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pub fn (s string) find_between(start string, end string) string {
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return string(s.str.slice(s.str.indexOf(start.str) + 1, s.str.indexOf(end.str)))
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}
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// unnecessary in the JS backend, implemented for api parity.
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pub fn (s &string) free() {}
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pub fn (s string) hash() int {
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mut h := u32(0)
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if h == 0 && s.len > 0 {
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for c in s {
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h = h * 31 + u32(c)
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}
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}
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return int(h)
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}
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// int returns the value of the string as an integer `'1'.int() == 1`.
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pub fn (s string) int() int {
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return int(JS.parseInt(s))
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}
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// i64 returns the value of the string as i64 `'1'.i64() == i64(1)`.
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pub fn (s string) i64() i64 {
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return i64(JS.parseInt(s))
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}
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// i8 returns the value of the string as i8 `'1'.i8() == i8(1)`.
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pub fn (s string) i8() i8 {
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return i8(JS.parseInt(s))
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}
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// i16 returns the value of the string as i16 `'1'.i16() == i16(1)`.
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pub fn (s string) i16() i16 {
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return i16(JS.parseInt(s))
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}
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// f32 returns the value of the string as f32 `'1.0'.f32() == f32(1)`.
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pub fn (s string) f32() f32 {
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// return C.atof(&char(s.str))
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return f32(JS.parseFloat(s))
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}
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// f64 returns the value of the string as f64 `'1.0'.f64() == f64(1)`.
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pub fn (s string) f64() f64 {
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return f64(JS.parseFloat(s))
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}
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// u16 returns the value of the string as u16 `'1'.u16() == u16(1)`.
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pub fn (s string) u16() u16 {
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return u16(JS.parseInt(s))
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}
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// u32 returns the value of the string as u32 `'1'.u32() == u32(1)`.
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pub fn (s string) u32() u32 {
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return u32(JS.parseInt(s))
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}
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// u64 returns the value of the string as u64 `'1'.u64() == u64(1)`.
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pub fn (s string) u64() u64 {
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return u64(JS.parseInt(s))
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}
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pub fn (s string) byte() u64 {
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res := byte(0)
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#res.val = byte(JS.parseInt(s))
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return res
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}
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// trim_right strips any of the characters given in `cutset` from the right of the string.
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// Example: assert ' Hello V d'.trim_right(' d') == ' Hello V'
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pub fn (s string) trim_right(cutset string) string {
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if s.len < 1 || cutset.len < 1 {
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return s.clone()
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}
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mut pos := s.len - 1
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for pos >= 0 {
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mut found := false
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for cs in cutset {
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if s[pos] == cs {
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found = true
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}
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}
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if !found {
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break
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}
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pos--
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}
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if pos < 0 {
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return ''
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}
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return s[..pos + 1]
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}
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// trim_left strips any of the characters given in `cutset` from the left of the string.
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// Example: assert 'd Hello V developer'.trim_left(' d') == 'Hello V developer'
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[direct_array_access]
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pub fn (s string) trim_left(cutset string) string {
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if s.len < 1 || cutset.len < 1 {
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return s.clone()
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}
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mut pos := 0
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for pos < s.len {
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mut found := false
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for cs in cutset {
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if s[pos] == cs {
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found = true
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break
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}
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}
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if !found {
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break
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}
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pos++
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}
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return s[pos..]
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}
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// trim_prefix strips `str` from the start of the string.
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// Example: assert 'WorldHello V'.trim_prefix('World') == 'Hello V'
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pub fn (s string) trim_prefix(str string) string {
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if s.starts_with(str) {
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return s[str.len..]
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}
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return s.clone()
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}
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// trim_suffix strips `str` from the end of the string.
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// Example: assert 'Hello VWorld'.trim_suffix('World') == 'Hello V'
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pub fn (s string) trim_suffix(str string) string {
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if s.ends_with(str) {
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return s[..s.len - str.len]
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}
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return s.clone()
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}
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// compare_strings returns `-1` if `a < b`, `1` if `a > b` else `0`.
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pub fn compare_strings(a &string, b &string) int {
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if a < b {
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return -1
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}
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if a > b {
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return 1
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}
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return 0
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}
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// compare_strings_reverse returns `1` if `a < b`, `-1` if `a > b` else `0`.
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fn compare_strings_reverse(a &string, b &string) int {
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if a < b {
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return 1
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}
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if a > b {
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return -1
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}
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return 0
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}
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// compare_strings_by_len returns `-1` if `a.len < b.len`, `1` if `a.len > b.len` else `0`.
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fn compare_strings_by_len(a &string, b &string) int {
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if a.len < b.len {
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return -1
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}
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if a.len > b.len {
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return 1
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}
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return 0
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}
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// compare_lower_strings returns the same as compare_strings but converts `a` and `b` to lower case before comparing.
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fn compare_lower_strings(a &string, b &string) int {
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aa := a.to_lower()
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bb := b.to_lower()
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return compare_strings(&aa, &bb)
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}
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// at returns the byte at index `idx`.
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// Example: assert 'ABC'.at(1) == byte(`B`)
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fn (s string) at(idx int) byte {
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mut result := byte(0)
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#result = new byte(s.str.charCodeAt(result))
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return result
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}
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pub fn (s string) to_lower() string {
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mut result := ''
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#let str = s.str.toLowerCase()
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#result = new string(str)
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return result
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}
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// TODO: check if that behaves the same as V's own string.replace(old_sub,new_sub):
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pub fn (s string) replace(old_sub string, new_sub string) string {
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mut result := ''
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#result = new string( s.str.replaceAll(old_sub.str, new_sub.str) )
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return result
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}
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pub fn (s string) to_upper() string {
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mut result := ''
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#let str = s.str.toUpperCase()
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#result = new string(str)
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return result
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}
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// sort sorts the string array.
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pub fn (mut s []string) sort() {
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s.sort_with_compare(compare_strings)
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}
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// sort_ignore_case sorts the string array using case insesitive comparing.
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pub fn (mut s []string) sort_ignore_case() {
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s.sort_with_compare(compare_lower_strings)
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}
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// sort_by_len sorts the the string array by each string's `.len` length.
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pub fn (mut s []string) sort_by_len() {
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s.sort_with_compare(compare_strings_by_len)
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}
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// str returns a copy of the string
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pub fn (s string) str() string {
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return s.clone()
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}
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pub fn (s string) repeat(count int) string {
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mut result := ''
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#result = new string(s.str.repeat(count))
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return result
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}
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// TODO(playX): Use this iterator instead of using .split('').map(c => byte(c))
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#function string_iterator(string) { this.stringIteratorFieldIndex = 0; this.stringIteratorIteratedString = string.str; }
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#string_iterator.prototype.next = function next() {
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#var done = true;
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#var value = undefined;
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#var position = this.stringIteratorFieldIndex;
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#if (position !== -1) {
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#var string = this.stringIteratorIteratedString;
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#var length = string.length >>> 0;
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#if (position >= length) {
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#this.stringIteratorFieldIndex = -1;
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#} else {
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#done = false;
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#var first = string.charCodeAt(position);
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#if (first < 0xD800 || first > 0xDBFF || position + 1 === length)
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#value = new byte(string[position]);
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#else {
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#value = new byte(string[position]+string[position+1])
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#}
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#this.stringIteratorFieldIndex = position + value.length;
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#}
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#}
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#return {
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#value, done
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#}
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#}
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#string.prototype[Symbol.iterator] = function () { return new string_iterator(this) }
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// TODO: Make these functions actually work.
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// strip_margin allows multi-line strings to be formatted in a way that removes white-space
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// before a delimeter. by default `|` is used.
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// Note: the delimiter has to be a byte at this time. That means surrounding
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// the value in ``.
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//
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// Example:
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// st := 'Hello there,
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// |this is a string,
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// | Everything before the first | is removed'.strip_margin()
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// Returns:
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// Hello there,
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// this is a string,
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// Everything before the first | is removed
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pub fn (s string) strip_margin() string {
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return s.strip_margin_custom(`|`)
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}
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// strip_margin_custom does the same as `strip_margin` but will use `del` as delimiter instead of `|`
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[direct_array_access]
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pub fn (s string) strip_margin_custom(del byte) string {
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mut sep := del
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if sep.is_space() {
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eprintln('Warning: `strip_margin` cannot use white-space as a delimiter')
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eprintln(' Defaulting to `|`')
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sep = `|`
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}
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// don't know how much space the resulting string will be, but the max it
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// can be is this big
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mut ret := []byte{}
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#ret = new array()
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mut count := 0
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for i := 0; i < s.len; i++ {
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if s[i] in [10, 13] {
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unsafe {
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ret[count] = s[i]
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}
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count++
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// CRLF
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if s[i] == 13 && i < s.len - 1 && s[i + 1] == 10 {
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unsafe {
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ret[count] = s[i + 1]
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}
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count++
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i++
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}
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for s[i] != sep {
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i++
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if i >= s.len {
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break
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}
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}
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} else {
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unsafe {
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ret[count] = s[i]
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}
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count++
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}
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}
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/*
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unsafe {
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ret[count] = 0
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return ret.vstring_with_len(count)
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}*/
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mut result := ''
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#for (let x of ret.arr) result.str += String.fromCharCode(x.val)
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return result
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}
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// split_nth splits the string based on the passed `delim` substring.
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// It returns the first Nth parts. When N=0, return all the splits.
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// The last returned element has the remainder of the string, even if
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// the remainder contains more `delim` substrings.
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[direct_array_access]
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pub fn (s string) split_nth(delim string, nth int) []string {
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mut res := []string{}
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mut i := 0
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match delim.len {
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0 {
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i = 1
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for ch in s {
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if nth > 0 && i >= nth {
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res << s[i..]
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break
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}
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res << ch.str()
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i++
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}
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return res
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}
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1 {
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mut start := 0
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delim_byte := delim[0]
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for i < s.len {
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if s[i] == delim_byte {
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was_last := nth > 0 && res.len == nth - 1
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if was_last {
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break
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}
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val := s[start..i] //.substr(start, i)
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res << val
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start = i + delim.len
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i = start
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} else {
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|
i++
|
|
}
|
|
}
|
|
|
|
// Then the remaining right part of the string
|
|
if nth < 1 || res.len < nth {
|
|
res << s[start..]
|
|
}
|
|
return res
|
|
}
|
|
else {
|
|
mut start := 0
|
|
// Take the left part for each delimiter occurence
|
|
for i <= s.len {
|
|
is_delim := i + delim.len <= s.len && s[i..i + delim.len] == delim
|
|
if is_delim {
|
|
was_last := nth > 0 && res.len == nth - 1
|
|
if was_last {
|
|
break
|
|
}
|
|
val := s[start..i] // .substr(start, i)
|
|
res << val
|
|
start = i + delim.len
|
|
i = start
|
|
} else {
|
|
i++
|
|
}
|
|
}
|
|
// Then the remaining right part of the string
|
|
if nth < 1 || res.len < nth {
|
|
res << s[start..]
|
|
}
|
|
return res
|
|
}
|
|
}
|
|
}
|
|
|
|
struct RepIndex {
|
|
idx int
|
|
val_idx int
|
|
}
|
|
|
|
// replace_each replaces all occurences of the string pairs given in `vals`.
|
|
// Example: assert 'ABCD'.replace_each(['B','C/','C','D','D','C']) == 'AC/DC'
|
|
[direct_array_access]
|
|
pub fn (s string) replace_each(vals []string) string {
|
|
if s.len == 0 || vals.len == 0 {
|
|
return s.clone()
|
|
}
|
|
|
|
if vals.len % 2 != 0 {
|
|
eprintln('string.replace_each(): odd number of strings')
|
|
return s.clone()
|
|
}
|
|
|
|
// `rep` - string to replace
|
|
// `with_` - string to replace with_
|
|
// Remember positions of all rep strings, and calculate the length
|
|
// of the new string to do just one allocation.
|
|
|
|
mut idxs := []RepIndex{}
|
|
mut idx := 0
|
|
mut new_len := s.len
|
|
s_ := s.clone()
|
|
#function setCharAt(str,index,chr) {
|
|
#if(index > str.length-1) return str;
|
|
#return str.substring(0,index) + chr + str.substring(index+1);
|
|
#}
|
|
|
|
for rep_i := 0; rep_i < vals.len; rep_i = rep_i + 2 {
|
|
rep := vals[rep_i]
|
|
|
|
mut with_ := vals[rep_i + 1]
|
|
with_ = with_
|
|
|
|
for {
|
|
idx = s_.index_after(rep, idx)
|
|
if idx == -1 {
|
|
break
|
|
}
|
|
|
|
for i in 0 .. rep.len {
|
|
mut j_ := i
|
|
j_ = j_
|
|
#s_.str = setCharAt(s_.str,idx + i, String.fromCharCode(127))
|
|
}
|
|
|
|
rep_idx := RepIndex{
|
|
idx: 0
|
|
val_idx: 0
|
|
}
|
|
// todo: primitives should always be copied
|
|
#rep_idx.idx = idx.val
|
|
#rep_idx.val_idx = new int(rep_i.val)
|
|
idxs << rep_idx
|
|
idx += rep.len
|
|
new_len += with_.len - rep.len
|
|
}
|
|
}
|
|
|
|
if idxs.len == 0 {
|
|
return s.clone()
|
|
}
|
|
|
|
idxs.sort(a.idx < b.idx)
|
|
|
|
mut b := ''
|
|
#for (let i = 0; i < new_len.val;i++) b.str += String.fromCharCode(127)
|
|
|
|
new_len = new_len
|
|
mut idx_pos := 0
|
|
mut cur_idx := idxs[idx_pos]
|
|
mut b_i := 0
|
|
for i := 0; i < s.len; i++ {
|
|
if i == cur_idx.idx {
|
|
rep := vals[cur_idx.val_idx]
|
|
with_ := vals[cur_idx.val_idx + 1]
|
|
for j in 0 .. with_.len {
|
|
mut j_ := j
|
|
|
|
j_ = j_
|
|
#b.str = setCharAt(b.str,b_i, with_.str[j])
|
|
//#b.str[b_i] = with_.str[j]
|
|
b_i++
|
|
}
|
|
i += rep.len - 1
|
|
idx_pos++
|
|
if idx_pos < idxs.len {
|
|
cur_idx = idxs[idx_pos]
|
|
}
|
|
} else {
|
|
#b.str = setCharAt(b.str,b_i,s.str[i]) //b.str[b_i] = s.str[i]
|
|
b_i++
|
|
}
|
|
}
|
|
|
|
return b
|
|
}
|
|
|
|
// last_index returns the position of the last occurence of the input string.
|
|
fn (s string) last_index_(p string) int {
|
|
if p.len > s.len || p.len == 0 {
|
|
return -1
|
|
}
|
|
mut i := s.len - p.len
|
|
for i >= 0 {
|
|
mut j := 0
|
|
for j < p.len && s[i + j] == p[j] {
|
|
j++
|
|
}
|
|
if j == p.len {
|
|
return i
|
|
}
|
|
i--
|
|
}
|
|
return -1
|
|
}
|
|
|
|
// last_index returns the position of the last occurence of the input string.
|
|
pub fn (s string) last_index(p string) ?int {
|
|
idx := s.last_index_(p)
|
|
if idx == -1 {
|
|
return none
|
|
}
|
|
return idx
|
|
}
|
|
|
|
pub fn (s string) trim_space() string {
|
|
res := ''
|
|
#res.str = s.str.trim()
|
|
|
|
return res
|
|
}
|
|
|
|
pub fn (s string) index_after(p string, start int) int {
|
|
if p.len > s.len {
|
|
return -1
|
|
}
|
|
|
|
mut strt := start
|
|
if start < 0 {
|
|
strt = 0
|
|
}
|
|
if start >= s.len {
|
|
return -1
|
|
}
|
|
mut i := strt
|
|
|
|
for i < s.len {
|
|
mut j := 0
|
|
mut ii := i
|
|
for j < p.len && s[ii] == p[j] {
|
|
j++
|
|
ii++
|
|
}
|
|
|
|
if j == p.len {
|
|
return i
|
|
}
|
|
i++
|
|
}
|
|
return -1
|
|
}
|
|
|
|
pub fn (s string) split_into_lines() []string {
|
|
mut res := []string{}
|
|
if s.len == 0 {
|
|
return res
|
|
}
|
|
#res.arr.arr = s.str.split("\n")
|
|
#if (res.arr.arr[res.arr.arr.length-1] == "") res.arr.arr.pop();
|
|
#res.arr.len = new int(res.arr.arr.length);
|
|
#res.arr.cap = new int(res.arr.arr.length);
|
|
|
|
return res
|
|
}
|
|
|
|
// replace_once replaces the first occurence of `rep` with the string passed in `with`.
|
|
pub fn (s string) replace_once(rep string, with_ string) string {
|
|
s2 := ''
|
|
#s2.val = s.str.replace(rep.str,with_.str)
|
|
|
|
return s2
|
|
}
|
|
|
|
pub fn (s string) title() string {
|
|
words := s.split(' ')
|
|
mut tit := []string{}
|
|
for word in words {
|
|
tit << word.capitalize()
|
|
}
|
|
|
|
title := tit.join(' ')
|
|
return title
|
|
}
|
|
|
|
// index_any returns the position of any of the characters in the input string - if found.
|
|
pub fn (s string) index_any(chars string) int {
|
|
for i, ss in s {
|
|
for c in chars {
|
|
if c == ss {
|
|
return i
|
|
}
|
|
}
|
|
}
|
|
return -1
|
|
}
|
|
|
|
// limit returns a portion of the string, starting at `0` and extending for a given number of characters afterward.
|
|
// 'hello'.limit(2) => 'he'
|
|
// 'hi'.limit(10) => 'hi'
|
|
pub fn (s string) limit(max int) string {
|
|
u := s.runes()
|
|
if u.len <= max {
|
|
return s.clone()
|
|
}
|
|
return u[0..max].string()
|
|
}
|
|
|
|
// is_title returns true if all words of the string is capitalized.
|
|
// Example: assert 'Hello V Developer'.is_title() == true
|
|
pub fn (s string) is_title() bool {
|
|
words := s.split(' ')
|
|
for word in words {
|
|
if !word.is_capital() {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// is_capital returns `true` if the first character in the string is a capital letter.
|
|
// Example: assert 'Hello'.is_capital() == true
|
|
[direct_array_access]
|
|
pub fn (s string) is_capital() bool {
|
|
if s.len == 0 || !(s[0] >= `A` && s[0] <= `Z`) {
|
|
return false
|
|
}
|
|
for i in 1 .. s.len {
|
|
if s[i] >= `A` && s[i] <= `Z` {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// is_upper returns `true` if all characters in the string is uppercase.
|
|
// Example: assert 'HELLO V'.is_upper() == true
|
|
pub fn (s string) is_upper() bool {
|
|
res := false
|
|
#res.val = s.str == s.str.toUpperCase() && s.str != s.str.toLowerCase()
|
|
|
|
return res
|
|
}
|
|
|
|
// is_upper returns `true` if all characters in the string is uppercase.
|
|
// Example: assert 'HELLO V'.is_upper() == true
|
|
pub fn (s string) is_lower() bool {
|
|
res := false
|
|
#res.val = s.str == s.str.toLowerCase() && s.str != s.str.toUpperCase()
|
|
|
|
return res
|
|
}
|
|
|
|
pub fn (s string) reverse() string {
|
|
res := ''
|
|
#res.str = [...s.str].reverse().join('')
|
|
|
|
return res
|
|
}
|
|
|
|
pub fn (s string) trim(cutset string) string {
|
|
if s.len < 1 || cutset.len < 1 {
|
|
return s.clone()
|
|
}
|
|
mut pos_left := 0
|
|
mut pos_right := s.len - 1
|
|
mut cs_match := true
|
|
for pos_left <= s.len && pos_right >= -1 && cs_match {
|
|
cs_match = false
|
|
for cs in cutset {
|
|
if s[pos_left] == cs {
|
|
pos_left++
|
|
cs_match = true
|
|
break
|
|
}
|
|
}
|
|
for cs in cutset {
|
|
if s[pos_right] == cs {
|
|
pos_right--
|
|
cs_match = true
|
|
break
|
|
}
|
|
}
|
|
if pos_left > pos_right {
|
|
return ''
|
|
}
|
|
}
|
|
return s.substr(pos_left, pos_right + 1)
|
|
}
|
|
|
|
pub fn (s []string) join(sep string) string {
|
|
mut res := ''
|
|
for i, str in s {
|
|
res += str
|
|
if i != s.len - 1 {
|
|
res += sep
|
|
}
|
|
}
|
|
return res
|
|
}
|
|
|
|
// There's no better way to find length of JS String in bytes.
|
|
#Object.defineProperty(string.prototype,"len", { get: function() {return new int(new TextEncoder().encode(this.str).length);}, set: function(l) {/* ignore */ } });
|
|
// index returns the position of the first character of the input string.
|
|
// It will return `none` if the input string can't be found.
|
|
pub fn (s string) index(search string) ?int {
|
|
res := 0
|
|
#res.val = s.str.indexOf(search)
|
|
if res == -1 {
|
|
return none
|
|
}
|
|
return res
|
|
}
|
|
|
|
pub fn (_rune string) utf32_code() int {
|
|
res := 0
|
|
#res.val = s.str.charCodeAt()
|
|
|
|
return res
|
|
}
|
|
|
|
pub fn tos(jsstr JS.String) string {
|
|
res := ''
|
|
#res.str = jsstr
|
|
|
|
return res
|
|
}
|