proto_rs 0.11.24

Rust-first gRPC macros collection for .proto/protobufs managment and more
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
136
137
138
139
140
141
142
143

use crate::encoding::WireType;
use crate::traits::ProtoExt;

pub struct VarintConst<const N: usize> {
    pub bytes: [u8; N],
    pub len: usize,
}

pub enum ProtoKind {
    Primitive(PrimitiveKind),
    SimpleEnum,
    Message,
    Bytes,
    String,
    Repeated(&'static ProtoKind),
}

pub enum PrimitiveKind {
    AtomicU8, //special handling
    Bool,
    I8,
    I16,
    I32,
    I64,
    U8,
    U16,
    U32,
    U64,
    F32,
    F64,
    Fixed32,
    Fixed64,
    SFixed32,
    SFixed64,
    SInt32,
    SInt64,
}

impl ProtoKind {
    pub const fn dbg_name(&'static self) -> &'static str {
        match self {
            ProtoKind::Primitive(_) => "Primitive",
            ProtoKind::SimpleEnum => "SimpleEnum",
            ProtoKind::Message => "Message",
            ProtoKind::Bytes => "Bytes",
            ProtoKind::String => "String",
            ProtoKind::Repeated(_) => "Repeated",
        }
    }

    #[inline]
    pub const fn for_vec(inner: &'static ProtoKind) -> ProtoKind {
        ProtoKind::Repeated(inner)
    }

    pub const fn is_repeated_non_packable(&self) -> bool {
        match self {
            ProtoKind::Repeated(proto_kind) => !proto_kind.is_packable(),
            _ => false,
        }
    }
    #[inline]
    pub const fn is_packable(&self) -> bool {
        matches!(self, ProtoKind::Primitive(_) | ProtoKind::SimpleEnum)
    }

    #[inline]
    pub const fn is_bytes_kind(&self) -> bool {
        matches!(self, ProtoKind::Primitive(PrimitiveKind::U8))
    }
    #[inline]
    pub const fn wire_type(&self) -> WireType {
        match self {
            ProtoKind::Primitive(p) => match p {
                PrimitiveKind::AtomicU8
                | PrimitiveKind::Bool
                | PrimitiveKind::I8
                | PrimitiveKind::I16
                | PrimitiveKind::I32
                | PrimitiveKind::I64
                | PrimitiveKind::U8
                | PrimitiveKind::U16
                | PrimitiveKind::U32
                | PrimitiveKind::U64
                | PrimitiveKind::SInt32
                | PrimitiveKind::SInt64 => WireType::Varint,

                PrimitiveKind::Fixed32 | PrimitiveKind::SFixed32 | PrimitiveKind::F32 => WireType::ThirtyTwoBit,

                PrimitiveKind::Fixed64 | PrimitiveKind::SFixed64 | PrimitiveKind::F64 => WireType::SixtyFourBit,
            },
            ProtoKind::SimpleEnum => WireType::Varint,
            ProtoKind::Repeated(_) | ProtoKind::Message | ProtoKind::Bytes | ProtoKind::String => WireType::LengthDelimited,
        }
    }
}

#[track_caller]
#[allow(clippy::extra_unused_type_parameters)]
pub const fn const_unreachable<T: ProtoExt>(structure_name: &'static str) -> ! {
    match T::KIND {
        ProtoKind::Primitive(_) | ProtoKind::SimpleEnum | ProtoKind::Message | ProtoKind::Bytes | ProtoKind::String => {
            const_panic::concat_panic!("SHOULD BE SUPPORTED kind: ", T::KIND.dbg_name(), "in", structure_name)
        }
        ProtoKind::Repeated(proto_kind) => {
            const_panic::concat_panic!("unsupported REPEATED kind: ", proto_kind.dbg_name(), "in", structure_name)
        }
    }
}

#[track_caller]
#[allow(clippy::extra_unused_type_parameters)]
pub const fn const_test_validate_with_ext<T: ProtoExt>() -> ! {
    let name = T::KIND.dbg_name();
    const_panic::concat_panic!(name, ": has validator with ext and it should not be used in infallible rpc methods")
}

pub const fn encode_varint_const<const N: usize>(mut value: u64) -> VarintConst<N> {
    let mut out = [0u8; N];
    let mut i = 0usize;

    loop {
        // SAFETY: i < 10 always holds for valid varint encoding of u64
        let byte = (value & 0x7F) as u8;
        value >>= 7;

        if value == 0 {
            out[i] = byte;
            i += 1;
            break;
        }

        out[i] = byte | 0x80;
        i += 1;

        // Varints are never more than 10 bytes for u64.
        if i == N {
            break;
        }
    }

    VarintConst { bytes: out, len: i }
}