45 lines
1.1 KiB
Rust
45 lines
1.1 KiB
Rust
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fn float_to_str(num: float, digits: uint) -> str {
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let accum = if num < 0.0 { num = -num; "-" } else { "" };
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let trunc = num as uint;
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let frac = num - (trunc as float);
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accum += uint::str(trunc);
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if frac == 0.0 || digits == 0u { ret accum; }
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accum += ".";
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while digits > 0u && frac > 0.0 {
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frac *= 10.0;
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let digit = frac as uint;
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accum += uint::str(digit);
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frac -= digit as float;
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digits -= 1u;
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}
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ret accum;
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}
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fn str_to_float(num: str) -> float {
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let digits = str::split(num, '.' as u8);
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let total = int::from_str(digits[0]) as float;
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fn dec_val(c: char) -> int { ret (c as int) - ('0' as int); }
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let right = digits[1];
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let len = str::char_len(digits[1]);
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let i = 1u;
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while (i < len) {
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total += dec_val(str::pop_char(right)) as float /
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(int::pow(10, i) as float);
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i += 1u;
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}
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ret total;
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}
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//
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// Local Variables:
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// mode: rust
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// compile-command: "make -k -C $RBUILD 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
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// End:
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//
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