mirror of
https://github.com/odin-lang/Odin.git
synced 2025-12-28 17:04:34 +00:00
1128 lines
21 KiB
Odin
1128 lines
21 KiB
Odin
package bytes
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import "core:mem"
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import "core:unicode"
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import "core:unicode/utf8"
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clone :: proc(s: []byte, allocator := context.allocator, loc := #caller_location) -> []byte {
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c := make([]byte, len(s)+1, allocator, loc);
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copy(c, s);
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c[len(s)] = 0;
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return c[:len(s)];
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}
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ptr_from_slice :: proc(str: []byte) -> ^byte {
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d := transmute(mem.Raw_String)str;
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return d.data;
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}
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// Compares two strings, returning a value representing which one comes first lexiographically.
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// -1 for `a`; 1 for `b`, or 0 if they are equal.
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compare :: proc(lhs, rhs: []byte) -> int {
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return mem.compare(lhs, rhs);
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}
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contains_rune :: proc(s: []byte, r: rune) -> int {
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for c, offset in string(s) {
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if c == r {
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return offset;
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}
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}
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return -1;
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}
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contains :: proc(s, substr: []byte) -> bool {
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return index(s, substr) >= 0;
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}
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contains_any :: proc(s, chars: []byte) -> bool {
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return index_any(s, chars) >= 0;
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}
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rune_count :: proc(s: []byte) -> int {
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return utf8.rune_count(s);
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}
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equal :: proc(a, b: []byte) -> bool {
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return string(a) == string(b);
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}
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equal_fold :: proc(u, v: []byte) -> bool {
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s, t := string(u), string(v);
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loop: for s != "" && t != "" {
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sr, tr: rune;
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if s[0] < utf8.RUNE_SELF {
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sr, s = rune(s[0]), s[1:];
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} else {
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r, size := utf8.decode_rune_in_string(s);
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sr, s = r, s[size:];
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}
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if t[0] < utf8.RUNE_SELF {
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tr, t = rune(t[0]), t[1:];
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} else {
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r, size := utf8.decode_rune_in_string(t);
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tr, t = r, t[size:];
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}
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if tr == sr { // easy case
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continue loop;
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}
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if tr < sr {
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tr, sr = sr, tr;
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}
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if tr < utf8.RUNE_SELF {
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switch sr {
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case 'A'..'Z':
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if tr == (sr+'a')-'A' {
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continue loop;
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}
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}
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return false;
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}
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// TODO(bill): Unicode folding
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return false;
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}
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return s == t;
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}
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has_prefix :: proc(s, prefix: []byte) -> bool {
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return len(s) >= len(prefix) && string(s[0:len(prefix)]) == string(prefix);
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}
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has_suffix :: proc(s, suffix: []byte) -> bool {
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return len(s) >= len(suffix) && string(s[len(s)-len(suffix):]) == string(suffix);
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}
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join :: proc(a: [][]byte, sep: []byte, allocator := context.allocator) -> []byte {
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if len(a) == 0 {
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return nil;
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}
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n := len(sep) * (len(a) - 1);
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for s in a {
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n += len(s);
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}
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b := make([]byte, n, allocator);
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i := copy(b, a[0]);
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for s in a[1:] {
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i += copy(b[i:], sep);
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i += copy(b[i:], s);
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}
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return b;
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}
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concatenate :: proc(a: [][]byte, allocator := context.allocator) -> []byte {
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if len(a) == 0 {
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return nil;
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}
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n := 0;
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for s in a {
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n += len(s);
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}
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b := make([]byte, n, allocator);
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i := 0;
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for s in a {
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i += copy(b[i:], s);
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}
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return b;
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}
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@private
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_split :: proc(s, sep: []byte, sep_save, n: int, allocator := context.allocator) -> [][]byte {
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s, n := s, n;
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if n == 0 {
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return nil;
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}
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if sep == nil {
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l := utf8.rune_count(s);
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if n < 0 || n > l {
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n = l;
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}
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res := make([dynamic][]byte, n, allocator);
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for i := 0; i < n-1; i += 1 {
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_, w := utf8.decode_rune(s);
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res[i] = s[:w];
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s = s[w:];
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}
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if n > 0 {
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res[n-1] = s;
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}
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return res[:];
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}
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if n < 0 {
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n = count(s, sep) + 1;
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}
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res := make([dynamic][]byte, n, allocator);
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n -= 1;
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i := 0;
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for ; i < n; i += 1 {
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m := index(s, sep);
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if m < 0 {
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break;
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}
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res[i] = s[:m+sep_save];
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s = s[m+len(sep):];
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}
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res[i] = s;
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return res[:i+1];
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}
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split :: proc(s, sep: []byte, allocator := context.allocator) -> [][]byte {
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return _split(s, sep, 0, -1, allocator);
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}
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split_n :: proc(s, sep: []byte, n: int, allocator := context.allocator) -> [][]byte {
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return _split(s, sep, 0, n, allocator);
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}
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split_after :: proc(s, sep: []byte, allocator := context.allocator) -> [][]byte {
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return _split(s, sep, len(sep), -1, allocator);
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}
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split_after_n :: proc(s, sep: []byte, n: int, allocator := context.allocator) -> [][]byte {
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return _split(s, sep, len(sep), n, allocator);
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}
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@private
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_split_iterator :: proc(s: ^[]byte, sep: []byte, sep_save, n: int) -> (res: []byte, ok: bool) {
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s, n := s, n;
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if n == 0 {
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return;
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}
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if sep == nil {
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res = s[:];
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ok = true;
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s^ = s[len(s):];
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return;
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}
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if n < 0 {
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n = count(s^, sep) + 1;
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}
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n -= 1;
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i := 0;
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for ; i < n; i += 1 {
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m := index(s^, sep);
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if m < 0 {
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break;
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}
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res = s[:m+sep_save];
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ok = true;
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s^ = s[m+len(sep):];
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return;
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}
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res = s[:];
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ok = res != nil;
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s^ = s[len(s):];
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return;
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}
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split_iterator :: proc(s: ^[]byte, sep: []byte) -> ([]byte, bool) {
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return _split_iterator(s, sep, 0, -1);
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}
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split_n_iterator :: proc(s: ^[]byte, sep: []byte, n: int) -> ([]byte, bool) {
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return _split_iterator(s, sep, 0, n);
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}
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split_after_iterator :: proc(s: ^[]byte, sep: []byte) -> ([]byte, bool) {
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return _split_iterator(s, sep, len(sep), -1);
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}
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split_after_n_iterator :: proc(s: ^[]byte, sep: []byte, n: int) -> ([]byte, bool) {
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return _split_iterator(s, sep, len(sep), n);
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}
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index_byte :: proc(s: []byte, c: byte) -> int {
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for i := 0; i < len(s); i += 1 {
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if s[i] == c {
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return i;
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}
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}
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return -1;
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}
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// Returns -1 if c is not present
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last_index_byte :: proc(s: []byte, c: byte) -> int {
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for i := len(s)-1; i >= 0; i -= 1 {
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if s[i] == c {
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return i;
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}
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}
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return -1;
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}
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@private PRIME_RABIN_KARP :: 16777619;
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index :: proc(s, substr: []byte) -> int {
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hash_str_rabin_karp :: proc(s: []byte) -> (hash: u32 = 0, pow: u32 = 1) {
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for i := 0; i < len(s); i += 1 {
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hash = hash*PRIME_RABIN_KARP + u32(s[i]);
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}
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sq := u32(PRIME_RABIN_KARP);
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for i := len(s); i > 0; i >>= 1 {
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if (i & 1) != 0 {
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pow *= sq;
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}
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sq *= sq;
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}
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return;
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}
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n := len(substr);
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switch {
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case n == 0:
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return 0;
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case n == 1:
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return index_byte(s, substr[0]);
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case n == len(s):
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if string(s) == string(substr) {
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return 0;
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}
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return -1;
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case n > len(s):
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return -1;
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}
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hash, pow := hash_str_rabin_karp(substr);
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h: u32;
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for i := 0; i < n; i += 1 {
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h = h*PRIME_RABIN_KARP + u32(s[i]);
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}
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if h == hash && string(s[:n]) == string(substr) {
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return 0;
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}
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for i := n; i < len(s); /**/ {
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h *= PRIME_RABIN_KARP;
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h += u32(s[i]);
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h -= pow * u32(s[i-n]);
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i += 1;
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if h == hash && string(s[i-n:i]) == string(substr) {
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return i - n;
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}
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}
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return -1;
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}
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last_index :: proc(s, substr: []byte) -> int {
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hash_str_rabin_karp_reverse :: proc(s: []byte) -> (hash: u32 = 0, pow: u32 = 1) {
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for i := len(s) - 1; i >= 0; i -= 1 {
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hash = hash*PRIME_RABIN_KARP + u32(s[i]);
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}
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sq := u32(PRIME_RABIN_KARP);
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for i := len(s); i > 0; i >>= 1 {
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if (i & 1) != 0 {
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pow *= sq;
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}
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sq *= sq;
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}
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return;
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}
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n := len(substr);
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switch {
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case n == 0:
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return len(s);
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case n == 1:
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return last_index_byte(s, substr[0]);
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case n == len(s):
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return 0 if string(substr) == string(s) else -1;
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case n > len(s):
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return -1;
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}
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hash, pow := hash_str_rabin_karp_reverse(substr);
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last := len(s) - n;
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h: u32;
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for i := len(s)-1; i >= last; i -= 1 {
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h = h*PRIME_RABIN_KARP + u32(s[i]);
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}
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if h == hash && string(s[last:]) == string(substr) {
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return last;
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}
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for i := last-1; i >= 0; i -= 1 {
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h *= PRIME_RABIN_KARP;
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h += u32(s[i]);
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h -= pow * u32(s[i+n]);
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if h == hash && string(s[i:i+n]) == string(substr) {
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return i;
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}
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}
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return -1;
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}
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index_any :: proc(s, chars: []byte) -> int {
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if chars == nil {
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return -1;
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}
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// TODO(bill): Optimize
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for r, i in s {
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for c in chars {
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if r == c {
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return i;
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}
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}
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}
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return -1;
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}
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last_index_any :: proc(s, chars: []byte) -> int {
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if chars == nil {
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return -1;
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}
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for i := len(s); i > 0; {
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r, w := utf8.decode_last_rune(s[:i]);
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i -= w;
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for c in string(chars) {
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if r == c {
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return i;
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}
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}
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}
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return -1;
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}
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count :: proc(s, substr: []byte) -> int {
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if len(substr) == 0 { // special case
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return rune_count(s) + 1;
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}
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if len(substr) == 1 {
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c := substr[0];
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switch len(s) {
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case 0:
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return 0;
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case 1:
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return int(s[0] == c);
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}
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n := 0;
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for i := 0; i < len(s); i += 1 {
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if s[i] == c {
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n += 1;
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}
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}
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return n;
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}
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// TODO(bill): Use a non-brute for approach
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n := 0;
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str := s;
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for {
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i := index(str, substr);
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if i == -1 {
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return n;
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}
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n += 1;
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str = str[i+len(substr):];
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}
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return n;
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}
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repeat :: proc(s: []byte, count: int, allocator := context.allocator) -> []byte {
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if count < 0 {
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panic("bytes: negative repeat count");
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} else if count > 0 && (len(s)*count)/count != len(s) {
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panic("bytes: repeat count will cause an overflow");
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}
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b := make([]byte, len(s)*count, allocator);
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i := copy(b, s);
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for i < len(b) { // 2^N trick to reduce the need to copy
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copy(b[i:], b[:i]);
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i *= 2;
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}
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return b;
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}
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replace_all :: proc(s, old, new: []byte, allocator := context.allocator) -> (output: []byte, was_allocation: bool) {
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return replace(s, old, new, -1, allocator);
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}
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// if n < 0, no limit on the number of replacements
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replace :: proc(s, old, new: []byte, n: int, allocator := context.allocator) -> (output: []byte, was_allocation: bool) {
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if string(old) == string(new) || n == 0 {
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was_allocation = false;
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output = s;
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return;
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}
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byte_count := n;
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if m := count(s, old); m == 0 {
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was_allocation = false;
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output = s;
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return;
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} else if n < 0 || m < n {
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byte_count = m;
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}
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t := make([]byte, len(s) + byte_count*(len(new) - len(old)), allocator);
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was_allocation = true;
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w := 0;
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start := 0;
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for i := 0; i < byte_count; i += 1 {
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j := start;
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if len(old) == 0 {
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if i > 0 {
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_, width := utf8.decode_rune(s[start:]);
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j += width;
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}
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} else {
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j += index(s[start:], old);
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}
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w += copy(t[w:], s[start:j]);
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w += copy(t[w:], new);
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start = j + len(old);
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}
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w += copy(t[w:], s[start:]);
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output = t[0:w];
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return;
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}
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@(private) _ascii_space := [256]u8{'\t' = 1, '\n' = 1, '\v' = 1, '\f' = 1, '\r' = 1, ' ' = 1};
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is_ascii_space :: proc(r: rune) -> bool {
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if r < utf8.RUNE_SELF {
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return _ascii_space[u8(r)] != 0;
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}
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return false;
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}
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is_space :: proc(r: rune) -> bool {
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if r < 0x2000 {
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switch r {
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case '\t', '\n', '\v', '\f', '\r', ' ', 0x85, 0xa0, 0x1680:
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return true;
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}
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} else {
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if r <= 0x200a {
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return true;
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}
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switch r {
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case 0x2028, 0x2029, 0x202f, 0x205f, 0x3000:
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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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is_null :: proc(r: rune) -> bool {
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return r == 0x0000;
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}
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index_proc :: proc(s: []byte, p: proc(rune) -> bool, truth := true) -> int {
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for r, i in string(s) {
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if p(r) == truth {
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return i;
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}
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}
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return -1;
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}
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index_proc_with_state :: proc(s: []byte, p: proc(rawptr, rune) -> bool, state: rawptr, truth := true) -> int {
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for r, i in string(s) {
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if p(state, r) == truth {
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return i;
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}
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}
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return -1;
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}
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|
|
last_index_proc :: proc(s: []byte, p: proc(rune) -> bool, truth := true) -> int {
|
|
// TODO(bill): Probably use Rabin-Karp Search
|
|
for i := len(s); i > 0; {
|
|
r, size := utf8.decode_last_rune(s[:i]);
|
|
i -= size;
|
|
if p(r) == truth {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
last_index_proc_with_state :: proc(s: []byte, p: proc(rawptr, rune) -> bool, state: rawptr, truth := true) -> int {
|
|
// TODO(bill): Probably use Rabin-Karp Search
|
|
for i := len(s); i > 0; {
|
|
r, size := utf8.decode_last_rune(s[:i]);
|
|
i -= size;
|
|
if p(state, r) == truth {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
trim_left_proc :: proc(s: []byte, p: proc(rune) -> bool) -> []byte {
|
|
i := index_proc(s, p, false);
|
|
if i == -1 {
|
|
return nil;
|
|
}
|
|
return s[i:];
|
|
}
|
|
|
|
|
|
index_rune :: proc(s: []byte, r: rune) -> int {
|
|
switch {
|
|
case 0 <= r && r < utf8.RUNE_SELF:
|
|
return index_byte(s, byte(r));
|
|
|
|
case r == utf8.RUNE_ERROR:
|
|
for c, i in string(s) {
|
|
if c == utf8.RUNE_ERROR {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
|
|
case !utf8.valid_rune(r):
|
|
return -1;
|
|
}
|
|
|
|
b, w := utf8.encode_rune(r);
|
|
return index(s, b[:w]);
|
|
}
|
|
|
|
|
|
trim_left_proc_with_state :: proc(s: []byte, p: proc(rawptr, rune) -> bool, state: rawptr) -> []byte {
|
|
i := index_proc_with_state(s, p, state, false);
|
|
if i == -1 {
|
|
return nil;
|
|
}
|
|
return s[i:];
|
|
}
|
|
|
|
trim_right_proc :: proc(s: []byte, p: proc(rune) -> bool) -> []byte {
|
|
i := last_index_proc(s, p, false);
|
|
if i >= 0 && s[i] >= utf8.RUNE_SELF {
|
|
_, w := utf8.decode_rune(s[i:]);
|
|
i += w;
|
|
} else {
|
|
i += 1;
|
|
}
|
|
return s[0:i];
|
|
}
|
|
|
|
trim_right_proc_with_state :: proc(s: []byte, p: proc(rawptr, rune) -> bool, state: rawptr) -> []byte {
|
|
i := last_index_proc_with_state(s, p, state, false);
|
|
if i >= 0 && s[i] >= utf8.RUNE_SELF {
|
|
_, w := utf8.decode_rune(s[i:]);
|
|
i += w;
|
|
} else {
|
|
i += 1;
|
|
}
|
|
return s[0:i];
|
|
}
|
|
|
|
|
|
is_in_cutset :: proc(state: rawptr, r: rune) -> bool {
|
|
if state == nil {
|
|
return false;
|
|
}
|
|
cutset := (^string)(state)^;
|
|
for c in cutset {
|
|
if r == c {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
trim_left :: proc(s: []byte, cutset: []byte) -> []byte {
|
|
if s == nil || cutset == nil {
|
|
return s;
|
|
}
|
|
state := cutset;
|
|
return trim_left_proc_with_state(s, is_in_cutset, &state);
|
|
}
|
|
|
|
trim_right :: proc(s: []byte, cutset: []byte) -> []byte {
|
|
if s == nil || cutset == nil {
|
|
return s;
|
|
}
|
|
state := cutset;
|
|
return trim_right_proc_with_state(s, is_in_cutset, &state);
|
|
}
|
|
|
|
trim :: proc(s: []byte, cutset: []byte) -> []byte {
|
|
return trim_right(trim_left(s, cutset), cutset);
|
|
}
|
|
|
|
trim_left_space :: proc(s: []byte) -> []byte {
|
|
return trim_left_proc(s, is_space);
|
|
}
|
|
|
|
trim_right_space :: proc(s: []byte) -> []byte {
|
|
return trim_right_proc(s, is_space);
|
|
}
|
|
|
|
trim_space :: proc(s: []byte) -> []byte {
|
|
return trim_right_space(trim_left_space(s));
|
|
}
|
|
|
|
|
|
trim_left_null :: proc(s: []byte) -> []byte {
|
|
return trim_left_proc(s, is_null);
|
|
}
|
|
|
|
trim_right_null :: proc(s: []byte) -> []byte {
|
|
return trim_right_proc(s, is_null);
|
|
}
|
|
|
|
trim_null :: proc(s: []byte) -> []byte {
|
|
return trim_right_null(trim_left_null(s));
|
|
}
|
|
|
|
trim_prefix :: proc(s, prefix: []byte) -> []byte {
|
|
if has_prefix(s, prefix) {
|
|
return s[len(prefix):];
|
|
}
|
|
return s;
|
|
}
|
|
|
|
trim_suffix :: proc(s, suffix: []byte) -> []byte {
|
|
if has_suffix(s, suffix) {
|
|
return s[:len(s)-len(suffix)];
|
|
}
|
|
return s;
|
|
}
|
|
|
|
split_multi :: proc(s: []byte, substrs: [][]byte, skip_empty := false, allocator := context.allocator) -> [][]byte #no_bounds_check {
|
|
if s == nil || len(substrs) <= 0 {
|
|
return nil;
|
|
}
|
|
|
|
sublen := len(substrs[0]);
|
|
|
|
for substr in substrs[1:] {
|
|
sublen = min(sublen, len(substr));
|
|
}
|
|
|
|
shared := len(s) - sublen;
|
|
|
|
if shared <= 0 {
|
|
return nil;
|
|
}
|
|
|
|
// number, index, last
|
|
n, i, l := 0, 0, 0;
|
|
|
|
// count results
|
|
first_pass: for i <= shared {
|
|
for substr in substrs {
|
|
if string(s[i:i+sublen]) == string(substr) {
|
|
if !skip_empty || i - l > 0 {
|
|
n += 1;
|
|
}
|
|
|
|
i += sublen;
|
|
l = i;
|
|
|
|
continue first_pass;
|
|
}
|
|
}
|
|
|
|
_, skip := utf8.decode_rune(s[i:]);
|
|
i += skip;
|
|
}
|
|
|
|
if !skip_empty || len(s) - l > 0 {
|
|
n += 1;
|
|
}
|
|
|
|
if n < 1 {
|
|
// no results
|
|
return nil;
|
|
}
|
|
|
|
buf := make([][]byte, n, allocator);
|
|
|
|
n, i, l = 0, 0, 0;
|
|
|
|
// slice results
|
|
second_pass: for i <= shared {
|
|
for substr in substrs {
|
|
if string(s[i:i+sublen]) == string(substr) {
|
|
if !skip_empty || i - l > 0 {
|
|
buf[n] = s[l:i];
|
|
n += 1;
|
|
}
|
|
|
|
i += sublen;
|
|
l = i;
|
|
|
|
continue second_pass;
|
|
}
|
|
}
|
|
|
|
_, skip := utf8.decode_rune(s[i:]);
|
|
i += skip;
|
|
}
|
|
|
|
if !skip_empty || len(s) - l > 0 {
|
|
buf[n] = s[l:];
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
|
|
|
|
|
|
split_multi_iterator :: proc(s: ^[]byte, substrs: [][]byte, skip_empty := false) -> ([]byte, bool) #no_bounds_check {
|
|
if s == nil || s^ == nil || len(substrs) <= 0 {
|
|
return nil, false;
|
|
}
|
|
|
|
sublen := len(substrs[0]);
|
|
|
|
for substr in substrs[1:] {
|
|
sublen = min(sublen, len(substr));
|
|
}
|
|
|
|
shared := len(s) - sublen;
|
|
|
|
if shared <= 0 {
|
|
return nil, false;
|
|
}
|
|
|
|
// index, last
|
|
i, l := 0, 0;
|
|
|
|
loop: for i <= shared {
|
|
for substr in substrs {
|
|
if string(s[i:i+sublen]) == string(substr) {
|
|
if !skip_empty || i - l > 0 {
|
|
res := s[l:i];
|
|
s^ = s[i:];
|
|
return res, true;
|
|
}
|
|
|
|
i += sublen;
|
|
l = i;
|
|
|
|
continue loop;
|
|
}
|
|
}
|
|
|
|
_, skip := utf8.decode_rune(s[i:]);
|
|
i += skip;
|
|
}
|
|
|
|
if !skip_empty || len(s) - l > 0 {
|
|
res := s[l:];
|
|
s^ = s[len(s):];
|
|
return res, true;
|
|
}
|
|
|
|
return nil, false;
|
|
}
|
|
|
|
|
|
|
|
|
|
// scrub scruvs invalid utf-8 characters and replaces them with the replacement string
|
|
// Adjacent invalid bytes are only replaced once
|
|
scrub :: proc(s: []byte, replacement: []byte, allocator := context.allocator) -> []byte {
|
|
str := s;
|
|
b: Buffer;
|
|
buffer_init_allocator(&b, 0, len(s), allocator);
|
|
|
|
has_error := false;
|
|
cursor := 0;
|
|
origin := str;
|
|
|
|
for len(str) > 0 {
|
|
r, w := utf8.decode_rune(str);
|
|
|
|
if r == utf8.RUNE_ERROR {
|
|
if !has_error {
|
|
has_error = true;
|
|
buffer_write(&b, origin[:cursor]);
|
|
}
|
|
} else if has_error {
|
|
has_error = false;
|
|
buffer_write(&b, replacement);
|
|
|
|
origin = origin[cursor:];
|
|
cursor = 0;
|
|
}
|
|
|
|
cursor += w;
|
|
str = str[w:];
|
|
}
|
|
|
|
return buffer_to_bytes(&b);
|
|
}
|
|
|
|
|
|
reverse :: proc(s: []byte, allocator := context.allocator) -> []byte {
|
|
str := s;
|
|
n := len(str);
|
|
buf := make([]byte, n);
|
|
i := n;
|
|
|
|
for len(str) > 0 {
|
|
_, w := utf8.decode_rune(str);
|
|
i -= w;
|
|
copy(buf[i:], str[:w]);
|
|
str = str[w:];
|
|
}
|
|
return buf;
|
|
}
|
|
|
|
expand_tabs :: proc(s: []byte, tab_size: int, allocator := context.allocator) -> []byte {
|
|
if tab_size <= 0 {
|
|
panic("tab size must be positive");
|
|
}
|
|
|
|
|
|
if s == nil {
|
|
return nil;
|
|
}
|
|
|
|
b: Buffer;
|
|
buffer_init_allocator(&b, 0, len(s), allocator);
|
|
|
|
str := s;
|
|
column: int;
|
|
|
|
for len(str) > 0 {
|
|
r, w := utf8.decode_rune(str);
|
|
|
|
if r == '\t' {
|
|
expand := tab_size - column%tab_size;
|
|
|
|
for i := 0; i < expand; i += 1 {
|
|
buffer_write_byte(&b, ' ');
|
|
}
|
|
|
|
column += expand;
|
|
} else {
|
|
if r == '\n' {
|
|
column = 0;
|
|
} else {
|
|
column += w;
|
|
}
|
|
|
|
buffer_write_rune(&b, r);
|
|
}
|
|
|
|
str = str[w:];
|
|
}
|
|
|
|
return buffer_to_bytes(&b);
|
|
}
|
|
|
|
partition :: proc(str, sep: []byte) -> (head, match, tail: []byte) {
|
|
i := index(str, sep);
|
|
if i == -1 {
|
|
head = str;
|
|
return;
|
|
}
|
|
|
|
head = str[:i];
|
|
match = str[i:i+len(sep)];
|
|
tail = str[i+len(sep):];
|
|
return;
|
|
}
|
|
|
|
center_justify :: centre_justify; // NOTE(bill): Because Americans exist
|
|
|
|
// centre_justify returns a byte slice with a pad byte slice at boths sides if the str's rune length is smaller than length
|
|
centre_justify :: proc(str: []byte, length: int, pad: []byte, allocator := context.allocator) -> []byte {
|
|
n := rune_count(str);
|
|
if n >= length || pad == nil {
|
|
return clone(str, allocator);
|
|
}
|
|
|
|
remains := length-1;
|
|
pad_len := rune_count(pad);
|
|
|
|
b: Buffer;
|
|
buffer_init_allocator(&b, 0, len(str) + (remains/pad_len + 1)*len(pad), allocator);
|
|
|
|
write_pad_string(&b, pad, pad_len, remains/2);
|
|
buffer_write(&b, str);
|
|
write_pad_string(&b, pad, pad_len, (remains+1)/2);
|
|
|
|
return buffer_to_bytes(&b);
|
|
}
|
|
|
|
// left_justify returns a byte slice with a pad byte slice at left side if the str's rune length is smaller than length
|
|
left_justify :: proc(str: []byte, length: int, pad: []byte, allocator := context.allocator) -> []byte {
|
|
n := rune_count(str);
|
|
if n >= length || pad == nil {
|
|
return clone(str, allocator);
|
|
}
|
|
|
|
remains := length-1;
|
|
pad_len := rune_count(pad);
|
|
|
|
b: Buffer;
|
|
buffer_init_allocator(&b, 0, len(str) + (remains/pad_len + 1)*len(pad), allocator);
|
|
|
|
buffer_write(&b, str);
|
|
write_pad_string(&b, pad, pad_len, remains);
|
|
|
|
return buffer_to_bytes(&b);
|
|
}
|
|
|
|
// right_justify returns a byte slice with a pad byte slice at right side if the str's rune length is smaller than length
|
|
right_justify :: proc(str: []byte, length: int, pad: []byte, allocator := context.allocator) -> []byte {
|
|
n := rune_count(str);
|
|
if n >= length || pad == nil {
|
|
return clone(str, allocator);
|
|
}
|
|
|
|
remains := length-1;
|
|
pad_len := rune_count(pad);
|
|
|
|
b: Buffer;
|
|
buffer_init_allocator(&b, 0, len(str) + (remains/pad_len + 1)*len(pad), allocator);
|
|
|
|
write_pad_string(&b, pad, pad_len, remains);
|
|
buffer_write(&b, str);
|
|
|
|
return buffer_to_bytes(&b);
|
|
}
|
|
|
|
|
|
|
|
|
|
@private
|
|
write_pad_string :: proc(b: ^Buffer, pad: []byte, pad_len, remains: int) {
|
|
repeats := remains / pad_len;
|
|
|
|
for i := 0; i < repeats; i += 1 {
|
|
buffer_write(b, pad);
|
|
}
|
|
|
|
n := remains % pad_len;
|
|
p := pad;
|
|
|
|
for i := 0; i < n; i += 1 {
|
|
r, width := utf8.decode_rune(p);
|
|
buffer_write_rune(b, r);
|
|
p = p[width:];
|
|
}
|
|
}
|
|
|
|
|
|
// fields splits the byte slice s around each instance of one or more consecutive white space character, defined by unicode.is_space
|
|
// returning a slice of subslices of s or an empty slice if s only contains white space
|
|
fields :: proc(s: []byte, allocator := context.allocator) -> [][]byte #no_bounds_check {
|
|
n := 0;
|
|
was_space := 1;
|
|
set_bits := u8(0);
|
|
|
|
// check to see
|
|
for i in 0..<len(s) {
|
|
r := s[i];
|
|
set_bits |= r;
|
|
is_space := int(_ascii_space[r]);
|
|
n += was_space & ~is_space;
|
|
was_space = is_space;
|
|
}
|
|
|
|
if set_bits >= utf8.RUNE_SELF {
|
|
return fields_proc(s, unicode.is_space, allocator);
|
|
}
|
|
|
|
if n == 0 {
|
|
return nil;
|
|
}
|
|
|
|
a := make([][]byte, n, allocator);
|
|
na := 0;
|
|
field_start := 0;
|
|
i := 0;
|
|
for i < len(s) && _ascii_space[s[i]] != 0 {
|
|
i += 1;
|
|
}
|
|
field_start = i;
|
|
for i < len(s) {
|
|
if _ascii_space[s[i]] == 0 {
|
|
i += 1;
|
|
continue;
|
|
}
|
|
a[na] = s[field_start : i];
|
|
na += 1;
|
|
i += 1;
|
|
for i < len(s) && _ascii_space[s[i]] != 0 {
|
|
i += 1;
|
|
}
|
|
field_start = i;
|
|
}
|
|
if field_start < len(s) {
|
|
a[na] = s[field_start:];
|
|
}
|
|
return a;
|
|
}
|
|
|
|
|
|
// fields_proc splits the byte slice s at each run of unicode code points `ch` satisfying f(ch)
|
|
// returns a slice of subslices of s
|
|
// If all code points in s satisfy f(ch) or string is empty, an empty slice is returned
|
|
//
|
|
// fields_proc makes no guarantee about the order in which it calls f(ch)
|
|
// it assumes that `f` always returns the same value for a given ch
|
|
fields_proc :: proc(s: []byte, f: proc(rune) -> bool, allocator := context.allocator) -> [][]byte #no_bounds_check {
|
|
subslices := make([dynamic][]byte, 0, 32, allocator);
|
|
|
|
start, end := -1, -1;
|
|
for r, offset in string(s) {
|
|
end = offset;
|
|
if f(r) {
|
|
if start >= 0 {
|
|
append(&subslices, s[start : end]);
|
|
// -1 could be used, but just speed it up through bitwise not
|
|
// gotta love 2's complement
|
|
start = ~start;
|
|
}
|
|
} else {
|
|
if start < 0 {
|
|
start = end;
|
|
}
|
|
}
|
|
}
|
|
|
|
if start >= 0 {
|
|
append(&subslices, s[start : end]);
|
|
}
|
|
|
|
return subslices[:];
|
|
}
|