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- //+private
- package strings
- import "core:unicode/utf8"
- Ascii_Set :: distinct [8]u32
- // create an ascii set of all unique characters in the string
- ascii_set_make :: proc(chars: string) -> (as: Ascii_Set, ok: bool) #no_bounds_check {
- for i in 0..<len(chars) {
- c := chars[i]
- if c >= utf8.RUNE_SELF {
- return
- }
- as[c>>5] |= 1 << uint(c&31)
- }
- ok = true
- return
- }
- // returns true when the `c` byte is contained in the `as` ascii set
- ascii_set_contains :: proc(as: Ascii_Set, c: byte) -> bool #no_bounds_check {
- return as[c>>5] & (1<<(c&31)) != 0
- }
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