core_json_traits/
primitives.rs

1use crate::{BytesLike, Stack, JsonError, Value, JsonDeserialize, JsonSerialize};
2
3impl JsonDeserialize for i8 {
4  fn deserialize<'bytes, 'parent, B: BytesLike<'bytes>, S: Stack>(
5    value: Value<'bytes, 'parent, B, S>,
6  ) -> Result<Self, JsonError<'bytes, B, S>> {
7    value.as_i64()?.try_into().map_err(|_| JsonError::TypeError)
8  }
9}
10impl JsonDeserialize for i16 {
11  fn deserialize<'bytes, 'parent, B: BytesLike<'bytes>, S: Stack>(
12    value: Value<'bytes, 'parent, B, S>,
13  ) -> Result<Self, JsonError<'bytes, B, S>> {
14    value.as_i64()?.try_into().map_err(|_| JsonError::TypeError)
15  }
16}
17impl JsonDeserialize for i32 {
18  fn deserialize<'bytes, 'parent, B: BytesLike<'bytes>, S: Stack>(
19    value: Value<'bytes, 'parent, B, S>,
20  ) -> Result<Self, JsonError<'bytes, B, S>> {
21    value.as_i64()?.try_into().map_err(|_| JsonError::TypeError)
22  }
23}
24impl JsonDeserialize for i64 {
25  fn deserialize<'bytes, 'parent, B: BytesLike<'bytes>, S: Stack>(
26    value: Value<'bytes, 'parent, B, S>,
27  ) -> Result<Self, JsonError<'bytes, B, S>> {
28    value.as_i64()
29  }
30}
31
32impl JsonDeserialize for u8 {
33  fn deserialize<'bytes, 'parent, B: BytesLike<'bytes>, S: Stack>(
34    value: Value<'bytes, 'parent, B, S>,
35  ) -> Result<Self, JsonError<'bytes, B, S>> {
36    value.as_i64()?.try_into().map_err(|_| JsonError::TypeError)
37  }
38}
39impl JsonDeserialize for u16 {
40  fn deserialize<'bytes, 'parent, B: BytesLike<'bytes>, S: Stack>(
41    value: Value<'bytes, 'parent, B, S>,
42  ) -> Result<Self, JsonError<'bytes, B, S>> {
43    value.as_i64()?.try_into().map_err(|_| JsonError::TypeError)
44  }
45}
46impl JsonDeserialize for u32 {
47  fn deserialize<'bytes, 'parent, B: BytesLike<'bytes>, S: Stack>(
48    value: Value<'bytes, 'parent, B, S>,
49  ) -> Result<Self, JsonError<'bytes, B, S>> {
50    value.as_i64()?.try_into().map_err(|_| JsonError::TypeError)
51  }
52}
53impl JsonDeserialize for u64 {
54  fn deserialize<'bytes, 'parent, B: BytesLike<'bytes>, S: Stack>(
55    value: Value<'bytes, 'parent, B, S>,
56  ) -> Result<Self, JsonError<'bytes, B, S>> {
57    value.as_i64()?.try_into().map_err(|_| JsonError::TypeError)
58  }
59}
60
61impl JsonDeserialize for bool {
62  fn deserialize<'bytes, 'parent, B: BytesLike<'bytes>, S: Stack>(
63    value: Value<'bytes, 'parent, B, S>,
64  ) -> Result<Self, JsonError<'bytes, B, S>> {
65    value.as_bool()
66  }
67}
68
69struct IntInterator {
70  value: u64,
71  digits: usize,
72  i: usize,
73}
74impl IntInterator {
75  fn new(value: u64) -> Self {
76    let digits = {
77      let mut digits = 0;
78      let mut value = value;
79      while value > 0 {
80        digits += 1;
81        value /= 10;
82      }
83      digits
84    };
85    IntInterator { value, digits, i: 0 }
86  }
87}
88impl Iterator for IntInterator {
89  type Item = char;
90  fn next(&mut self) -> Option<Self::Item> {
91    if self.i == self.digits {
92      None?;
93    }
94
95    let mut value = self.value;
96    // There will be at least one digit, as `self.i` starts at `0`
97    for _ in self.i .. (self.digits - 1) {
98      value /= 10;
99    }
100    self.i += 1;
101
102    // Safe to cast as this will be `< 10`, which fits within a `u8`
103    let char_offset = (value % 10) as u8;
104    // Safe to cast as this will be `'0' ..= '9'`
105    Some((b'0' + char_offset) as char)
106  }
107}
108fn u64_to_str(value: impl Into<u64>) -> impl Iterator<Item = char> {
109  let value = value.into();
110  let zero = value == 0;
111  zero.then(|| core::iter::once('0')).into_iter().flatten().chain(IntInterator::new(value))
112}
113pub(crate) fn i64_to_str(value: impl Into<i64>) -> impl Iterator<Item = char> {
114  let value: i64 = value.into();
115  value
116    .is_negative()
117    .then(|| core::iter::once('-'))
118    .into_iter()
119    .flatten()
120    .chain(u64_to_str(value.unsigned_abs()))
121}
122impl JsonSerialize for i8 {
123  fn serialize(&self) -> impl Iterator<Item = char> {
124    i64_to_str(*self)
125  }
126}
127impl JsonSerialize for i16 {
128  fn serialize(&self) -> impl Iterator<Item = char> {
129    i64_to_str(*self)
130  }
131}
132impl JsonSerialize for i32 {
133  fn serialize(&self) -> impl Iterator<Item = char> {
134    i64_to_str(*self)
135  }
136}
137impl JsonSerialize for i64 {
138  fn serialize(&self) -> impl Iterator<Item = char> {
139    i64_to_str(*self)
140  }
141}
142impl JsonSerialize for u8 {
143  fn serialize(&self) -> impl Iterator<Item = char> {
144    u64_to_str(*self)
145  }
146}
147impl JsonSerialize for u16 {
148  fn serialize(&self) -> impl Iterator<Item = char> {
149    u64_to_str(*self)
150  }
151}
152impl JsonSerialize for u32 {
153  fn serialize(&self) -> impl Iterator<Item = char> {
154    u64_to_str(*self)
155  }
156}
157impl JsonSerialize for u64 {
158  fn serialize(&self) -> impl Iterator<Item = char> {
159    u64_to_str(*self)
160  }
161}
162
163impl JsonSerialize for bool {
164  fn serialize(&self) -> impl Iterator<Item = char> {
165    (if *self { "true" } else { "false" }).chars()
166  }
167}
core_json_traits/primitives.rs

core_json_traits/
primitives.rs
