varing 0.13.0

Protobuf's varint encoding/decoding for LEB128 friendly types with full const context operations supports.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135

use super::*;

use ::bnum_0_13::*;

fuzzy!(@varint_into(
  ComplexI128(Complex<i128>),
  ComplexU128(Complex<u128>),
));

#[quickcheck_macros::quickcheck]
fn fuzzy_complex_u128(value: ArbitraryComplex<u128>) -> bool {
  let value = ::core::convert::Into::into(value);
  let mut buf = [0; <Complex<u128>>::MAX_ENCODED_LEN.get()];
  let encoded = encode_complex_u128_to(&value, &mut buf).unwrap();
  if encoded != encoded_complex_u128_len(&value) || !(encoded <= <Complex<u128>>::MAX_ENCODED_LEN) {
    return false;
  }

  let Some(consumed) = crate::consume_varint_checked(&buf) else {
    return false;
  };
  if consumed != encoded {
    return false;
  }

  if let Ok((bytes_read, decoded)) = decode_complex_u128(&buf) {
    value == decoded && encoded == bytes_read
  } else {
    false
  }
}

#[quickcheck_macros::quickcheck]
fn fuzzy_complex_i128(value: ArbitraryComplex<i128>) -> bool {
  let value = ::core::convert::Into::into(value);
  let mut buf = [0; <Complex<i128>>::MAX_ENCODED_LEN.get()];
  let encoded = encode_complex_i128_to(&value, &mut buf).unwrap();
  if encoded != encoded_complex_i128_len(&value) || !(encoded <= <Complex<i128>>::MAX_ENCODED_LEN) {
    return false;
  }

  let Some(consumed) = crate::consume_varint_checked(&buf) else {
    return false;
  };
  if consumed != encoded {
    return false;
  }

  if let Ok((bytes_read, decoded)) = decode_complex_i128(&buf) {
    value == decoded && encoded == bytes_read
  } else {
    false
  }
}

macro_rules! complex_bnum_fuzzy {
  (@varint_into ($($ty:ident($target:ty)), +$(,)?)) => {
    $(
      paste::paste! {
        #[quickcheck_macros::quickcheck]
        fn [< fuzzy_ $ty:snake _varint>](value: $ty) -> bool {
          let value: $target = ::core::convert::Into::into(value);
          let mut buf = [0; <$target>::MAX_ENCODED_LEN.get()];
          let Ok(encoded_len) = value.encode(&mut buf) else { return false; };
          if encoded_len != value.encoded_len() || !(value.encoded_len() <= <$target>::MAX_ENCODED_LEN) {
            return false;
          }

          let Some(consumed) = $crate::consume_varint_checked(&buf) else {
            return false;
          };
          if consumed != encoded_len {
            return false;
          }

          if let Ok((bytes_read, decoded)) = <$target>::decode(&buf) {
            value.re == decoded.re && value.im == decoded.im && encoded_len == bytes_read
          } else {
            false
          }
        }
      }
    )*
  };
}

macro_rules! type_aliases {
  ($sign:ident::$storage:literal::$base:ident($($bits:literal), + $(,)?)) => {
    paste::paste! {
      $(
        type [<$sign $bits>] = $base<{ $bits / 8 }>;
      )*
    }
  };
}

macro_rules! test_mod {
  ($($sign:ident::$base:ident::$storage:literal),+$(,)?) => {
    paste::paste! {
      $(
        mod [<$base:snake>] {
          use super::*;
          use ::bnum_0_13::$base;

          type_aliases!(U::$storage::$base(8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192));

          impl_arbitrary_complex!(@bnum (U8, U16, U32, U64, U128, U256, U512, U1024, U2048,));

          complex_bnum_fuzzy!(@varint_into (
            BnumComplexU8(Complex<U8>),
            BnumComplexU16(Complex<U16>),
            BnumComplexU32(Complex<U32>),
            BnumComplexU64(Complex<U64>),
            BnumComplexU128(Complex<U128>),
            BnumComplexU256(Complex<U256>),
            BnumComplexU512(Complex<U512>),
            BnumComplexU1024(Complex<U1024>),
            BnumComplexU2048(Complex<U2048>),
          ));
        }
      )*
    }
  };
}

test_mod!(
  U::BUintD8::8,
  U::BUintD16::16,
  U::BUintD32::32,
  U::BUint::64,
  I::BIntD8::8,
  I::BIntD16::16,
  I::BIntD32::32,
  I::BInt::64,
);