| 1 | // gc_mops.h - corresponds to mycpp/mops.py
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| 2 |
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| 3 | #ifndef MYCPP_GC_MOPS_H
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| 4 | #define MYCPP_GC_MOPS_H
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| 5 |
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| 6 | #include <stdint.h>
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| 7 |
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| 8 | #include "mycpp/common.h" // DCHECK
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| 9 |
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| 10 | class BigStr;
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| 11 |
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| 12 | namespace mops {
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| 13 |
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| 14 | // BigInt library
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| 15 | // TODO: Make it arbitrary size. Right now it's int64_t, which is distinct
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| 16 | // from int.
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| 17 |
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| 18 | typedef int64_t BigInt;
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| 19 |
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| 20 | // For convenience
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| 21 | extern const BigInt ZERO;
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| 22 | extern const BigInt ONE;
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| 23 | extern const BigInt MINUS_ONE;
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| 24 |
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| 25 | BigStr* ToStr(BigInt b);
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| 26 | BigInt FromStr(BigStr* s, int base = 10);
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| 27 |
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| 28 | inline int BigTruncate(BigInt b) {
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| 29 | return static_cast<int>(b);
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| 30 | }
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| 31 |
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| 32 | inline BigInt IntWiden(int b) {
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| 33 | return static_cast<BigInt>(b);
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| 34 | }
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| 35 |
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| 36 | inline BigInt FromC(int64_t i) {
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| 37 | return i;
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| 38 | }
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| 39 |
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| 40 | inline BigInt FromBool(bool b) {
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| 41 | return b ? BigInt(1) : BigInt(0);
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| 42 | }
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| 43 |
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| 44 | inline float ToFloat(BigInt b) {
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| 45 | // TODO: test this
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| 46 | return static_cast<float>(b);
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| 47 | }
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| 48 |
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| 49 | inline BigInt FromFloat(float f) {
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| 50 | // TODO: test this
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| 51 | return static_cast<BigInt>(f);
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| 52 | }
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| 53 |
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| 54 | inline BigInt Negate(BigInt b) {
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| 55 | return -b;
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| 56 | }
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| 57 |
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| 58 | inline BigInt Add(BigInt a, BigInt b) {
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| 59 | return a + b;
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| 60 | }
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| 61 |
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| 62 | inline BigInt Sub(BigInt a, BigInt b) {
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| 63 | return a - b;
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| 64 | }
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| 65 |
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| 66 | inline BigInt Mul(BigInt a, BigInt b) {
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| 67 | return a * b;
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| 68 | }
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| 69 |
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| 70 | inline BigInt Div(BigInt a, BigInt b) {
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| 71 | // Is the behavior of negative values defined in C++? Avoid difference with
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| 72 | // Python.
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| 73 | DCHECK(a >= 0);
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| 74 | DCHECK(b >= 0);
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| 75 | return a / b;
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| 76 | }
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| 77 |
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| 78 | inline BigInt Rem(BigInt a, BigInt b) {
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| 79 | // Is the behavior of negative values defined in C++? Avoid difference with
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| 80 | // Python.
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| 81 | DCHECK(a >= 0);
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| 82 | DCHECK(b >= 0);
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| 83 | return a % b;
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| 84 | }
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| 85 |
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| 86 | inline bool Equal(BigInt a, BigInt b) {
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| 87 | return a == b;
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| 88 | }
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| 89 |
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| 90 | inline bool Greater(BigInt a, BigInt b) {
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| 91 | return a > b;
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| 92 | }
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| 93 |
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| 94 | inline BigInt LShift(BigInt a, BigInt b) {
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| 95 | return a << b;
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| 96 | }
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| 97 |
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| 98 | inline BigInt RShift(BigInt a, BigInt b) {
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| 99 | return a >> b;
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| 100 | }
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| 101 |
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| 102 | inline BigInt BitAnd(BigInt a, BigInt b) {
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| 103 | return a & b;
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| 104 | }
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| 105 |
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| 106 | inline BigInt BitOr(BigInt a, BigInt b) {
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| 107 | return a | b;
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| 108 | }
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| 109 |
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| 110 | inline BigInt BitXor(BigInt a, BigInt b) {
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| 111 | return a ^ b;
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| 112 | }
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| 113 |
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| 114 | inline BigInt BitNot(BigInt a) {
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| 115 | return ~a;
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| 116 | }
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| 117 |
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| 118 | } // namespace mops
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| 119 |
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| 120 | #endif // MYCPP_GC_MOPS_H
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