89 lines
2.2 KiB
Rust
89 lines
2.2 KiB
Rust
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fn add(uint x, uint y) -> uint { ret x + y; }
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fn sub(uint x, uint y) -> uint { ret x - y; }
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fn mul(uint x, uint y) -> uint { ret x * y; }
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fn div(uint x, uint y) -> uint { ret x / y; }
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fn rem(uint x, uint y) -> uint { ret x % y; }
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fn lt(uint x, uint y) -> bool { ret x < y; }
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fn le(uint x, uint y) -> bool { ret x <= y; }
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fn eq(uint x, uint y) -> bool { ret x == y; }
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fn ne(uint x, uint y) -> bool { ret x != y; }
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fn ge(uint x, uint y) -> bool { ret x >= y; }
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fn gt(uint x, uint y) -> bool { ret x > y; }
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iter range(uint lo, uint hi) -> uint {
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auto lo_ = lo;
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while (lo_ < hi) {
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put lo_;
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lo_ += 1u;
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}
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}
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fn next_power_of_two(uint n) -> uint {
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// FIXME change |* uint(4)| below to |* uint(8) / uint(2)| and watch the
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// world explode.
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let uint halfbits = sys.rustrt.size_of[uint]() * 4u;
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let uint tmp = n - 1u;
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let uint shift = 1u;
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while (shift <= halfbits) {
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tmp |= tmp >> shift;
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shift <<= 1u;
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}
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ret tmp + 1u;
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}
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fn to_str(uint num, uint radix) -> str
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{
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auto n = num;
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check (0u < radix && radix <= 16u);
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fn digit(uint n) -> char {
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alt (n) {
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case (0u) { ret '0'; }
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case (1u) { ret '1'; }
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case (2u) { ret '2'; }
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case (3u) { ret '3'; }
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case (4u) { ret '4'; }
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case (5u) { ret '5'; }
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case (6u) { ret '6'; }
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case (7u) { ret '7'; }
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case (8u) { ret '8'; }
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case (9u) { ret '9'; }
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case (10u) { ret 'a'; }
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case (11u) { ret 'b'; }
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case (12u) { ret 'c'; }
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case (13u) { ret 'd'; }
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case (14u) { ret 'e'; }
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case (15u) { ret 'f'; }
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}
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fail;
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}
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if (n == 0u) { ret "0"; }
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let str s = "";
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while (n != 0u) {
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s += _str.unsafe_from_byte(digit(n % radix) as u8);
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n /= radix;
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}
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let str s1 = "";
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let uint len = _str.byte_len(s);
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while (len != 0u) {
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len -= 1u;
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s1 += _str.unsafe_from_byte(s.(len));
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}
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ret s1;
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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 .. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
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// End:
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