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Add Str.repeat builtin

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This commit is contained in:
Kofi Gumbs 2021-09-29 17:32:42 -04:00
parent 0b02929a53
commit b32a42f05a
11 changed files with 109 additions and 14 deletions
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1
compiler/builtins/bitcode/src/main.zig
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@ -101,6 +101,7 @@ comptime {
exportStrFn(str.strToUtf8C, "to_utf8");
exportStrFn(str.fromUtf8C, "from_utf8");
exportStrFn(str.fromUtf8RangeC, "from_utf8_range");
exportStrFn(str.repeat, "repeat");
}
// Utils

17
compiler/builtins/bitcode/src/str.zig
View file

@ -866,6 +866,23 @@ pub fn startsWith(string: RocStr, prefix: RocStr) callconv(.C) bool {
return true;
}
// Str.repeat
pub fn repeat(string: RocStr, count: usize) callconv(.C) RocStr {
const bytes_len = string.len();
const bytes_ptr = string.asU8ptr();
var ret_string = RocStr.allocate(.Clone, count * bytes_len);
var ret_string_ptr = ret_string.asU8ptr();
var i: usize = 0;
while (i < count) : (i += 1) {
@memcpy(ret_string_ptr + (i * bytes_len), bytes_ptr, bytes_len);
}
return ret_string;
}
// Str.startsWithCodePt
pub fn startsWithCodePt(string: RocStr, prefix: u32) callconv(.C) bool {
const bytes_ptr = string.asU8ptr();