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std: Add a few helpers for matching ascii strings (#7300) 

* startsWithIgnoreCase
* endsWithIgnoreCase
master
LemonBoy 2020-12-04 21:27:28 +01:00 committed by GitHub
parent ac443b941d
commit fd8fa55129
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18
lib/std/ascii.zig
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@ -335,6 +335,24 @@ test "eqlIgnoreCase" {
std.testing.expect(!eqlIgnoreCase("hElLo!", "helro!"));
}
pub fn startsWithIgnoreCase(haystack: []const u8, needle: []const u8) bool {
return if (needle.len > haystack.len) false else eqlIgnoreCase(haystack[0..needle.len], needle);
}
test "ascii.startsWithIgnoreCase" {
std.testing.expect(startsWithIgnoreCase("boB", "Bo"));
std.testing.expect(!startsWithIgnoreCase("Needle in hAyStAcK", "haystack"));
}
pub fn endsWithIgnoreCase(haystack: []const u8, needle: []const u8) bool {
return if (needle.len > haystack.len) false else eqlIgnoreCase(haystack[haystack.len - needle.len ..], needle);
}
test "ascii.endsWithIgnoreCase" {
std.testing.expect(endsWithIgnoreCase("Needle in HaYsTaCk", "haystack"));
std.testing.expect(!endsWithIgnoreCase("BoB", "Bo"));
}
/// Finds `substr` in `container`, ignoring case, starting at `start_index`.
/// TODO boyer-moore algorithm
pub fn indexOfIgnoreCasePos(container: []const u8, start_index: usize, substr: []const u8) ?usize {