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 | extern const BigInt MINUS_TWO;
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25 |
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26 | BigStr* ToStr(BigInt b);
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27 | BigStr* ToOctal(BigInt b);
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28 | BigStr* ToHexUpper(BigInt b);
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29 | BigStr* ToHexLower(BigInt b);
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30 |
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31 | BigInt FromStr(BigStr* s, int base = 10);
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32 |
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33 | inline int BigTruncate(BigInt b) {
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34 | return static_cast<int>(b);
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35 | }
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36 |
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37 | inline BigInt IntWiden(int b) {
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38 | return static_cast<BigInt>(b);
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39 | }
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40 |
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41 | inline BigInt FromC(int64_t i) {
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42 | return i;
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43 | }
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44 |
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45 | inline BigInt FromBool(bool b) {
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46 | return b ? BigInt(1) : BigInt(0);
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47 | }
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48 |
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49 | inline double ToFloat(BigInt b) {
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50 | return static_cast<double>(b);
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51 | }
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52 |
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53 | inline BigInt FromFloat(double f) {
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54 | return static_cast<BigInt>(f);
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55 | }
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56 |
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57 | inline BigInt Negate(BigInt b) {
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58 | return -b;
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59 | }
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60 |
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61 | inline BigInt Add(BigInt a, BigInt b) {
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62 | return a + b;
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63 | }
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64 |
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65 | inline BigInt Sub(BigInt a, BigInt b) {
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66 | return a - b;
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67 | }
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68 |
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69 | inline BigInt Mul(BigInt a, BigInt b) {
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70 | return a * b;
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71 | }
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72 |
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73 | inline BigInt Div(BigInt a, BigInt b) {
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74 | // Is the behavior of negative values defined in C++? Avoid difference with
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75 | // Python.
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76 | DCHECK(a >= 0);
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77 | DCHECK(b >= 0);
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78 | return a / b;
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79 | }
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80 |
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81 | inline BigInt Rem(BigInt a, BigInt b) {
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82 | // Is the behavior of negative values defined in C++? Avoid difference with
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83 | // Python.
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84 | DCHECK(a >= 0);
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85 | DCHECK(b >= 0);
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86 | return a % b;
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87 | }
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88 |
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89 | inline bool Equal(BigInt a, BigInt b) {
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90 | return a == b;
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91 | }
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92 |
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93 | inline bool Greater(BigInt a, BigInt b) {
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94 | return a > b;
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95 | }
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96 |
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97 | inline BigInt LShift(BigInt a, BigInt b) {
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98 | return a << b;
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99 | }
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100 |
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101 | inline BigInt RShift(BigInt a, BigInt b) {
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102 | return a >> b;
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103 | }
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104 |
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105 | inline BigInt BitAnd(BigInt a, BigInt b) {
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106 | return a & b;
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107 | }
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108 |
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109 | inline BigInt BitOr(BigInt a, BigInt b) {
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110 | return a | b;
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111 | }
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112 |
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113 | inline BigInt BitXor(BigInt a, BigInt b) {
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114 | return a ^ b;
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115 | }
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116 |
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117 | inline BigInt BitNot(BigInt a) {
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118 | return ~a;
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119 | }
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120 |
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121 | } // namespace mops
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122 |
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123 | #endif // MYCPP_GC_MOPS_H
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