53 lines
1.3 KiB
Plaintext
53 lines
1.3 KiB
Plaintext
// std.string (Ny) - Phase15 MVP
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// Usage:
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// include "apps/std/string.hako"
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// StdStringNy.string_length("abc"), StdStringNy.string_concat("a","b"),
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// StdStringNy.string_slice("hello",1,4), StdStringNy.string_index_of("banana","na"), StdStringNy.string_equals("x","y")
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// Notes:
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// - ASCII only; slice clamps [start,end)
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// - index_of returns -1 when not found
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// - Pure functions; no side effects
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static box StdStringNy {
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// Return length of string s (Integer)
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string_length(s) {
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if s == null { return 0 }
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return s.length()
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}
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// Concatenate two strings
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string_concat(a, b) {
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return a.concat(b)
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}
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// Slice string in [start, end) with simple clamping
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string_slice(s, start, end) {
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if s == null { return "" }
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return s.substring(start, end)
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}
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// Return first index of substring (or -1)
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string_index_of(s, sub) {
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if s == null { return -1 }
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if sub == null { return 0 }
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local n, m, i
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n = s.length()
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m = sub.length()
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if m == 0 { return 0 }
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if n < m { return -1 }
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i = 0
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loop (i <= (n - m)) {
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// Compare window
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if s.substring(i, i + m) == sub { return i }
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i = i + 1
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}
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return -1
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}
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// Return 1 if equal else 0 (Integer)
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string_equals(a, b) {
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if a == b { return 1 }
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return 0
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}
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}
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