27 lines
576 B
V
27 lines
576 B
V
fn hex_to_bytes(s string) ?[]u8 {
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mut ret := []u8{cap: s.len}
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for read := 0; read < s.len; read += 2 {
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high := s[read]
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low := s[read + 1]
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ret << match high {
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48...57 { (high - 48) << 4 }
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65...70 { (high - 65) << 4 }
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97...102 { (high - 97) << 4 }
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else { panic('impossible') }
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} + match low {
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48...57 { low - 48 }
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65...70 { low - 65 }
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97...102 { low - 97 }
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else { panic('impossible') }
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}
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}
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return ret
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}
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fn test_multiple_matchs_in_one_expr() {
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ret := hex_to_bytes('FFFF') or { 'error'.bytes() }
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println(ret)
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assert '$ret' == '[U, U]'
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}
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