alt-std 0.2.9

Alternative Lightweight Std library for making small executables and shared objects
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
136

use crate::vec::*;
use ::core::*;
use ::core::cmp::*;
use crate::hash::*;

#[repr(C)]
pub struct String {
    data    : Vec<u8>
}

impl String {
    pub fn withCapacity(c: usize) -> Self {
        Self { data: Vec::withCapacity(c) }
    }

    pub fn new() -> Self { Self { data: Vec::new() } }
    pub fn from(s: &str) -> Self {
        let mut st = Self::new();
        for c in s.bytes() {
            st.data.pushBack(c);
        }
        st
    }

    pub fn toStr(&self) -> &str {
        ::core::str::from_utf8(self.data.asArray()).expect("Error getting string out")
    }

    pub fn add(&mut self, u: u8) {
        self.data.pushBack(u);
    }

    pub fn asArray(&self) -> &[u8] { self.data.asArray() }
    pub fn asMutArray(&mut self) -> &mut [u8] { self.data.asMutArray() }
}

pub trait Append<T> {
    fn append(&mut self, other: T);
}

impl Append<&str> for String {
    fn append(&mut self, s: &str) {
        for c in s.bytes() {
            self.data.pushBack(c);
        }
    }
}

impl Append<&String> for String {
    fn append(&mut self, s: &String) {
        for c in s.toStr().bytes() {
            self.data.pushBack(c);
        }
    }
}

impl PartialEq<String> for String {
    fn eq(&self, other: &Self) -> bool {
        let ls = self.data.len();
        let lo = other.data.len();
        if ls != lo { return false }
        for i in 0..self.data.len() {
            if self.data[i] != other.data[i] { return false }
        }
        true
    }
}

impl Eq for String {}

impl PartialEq<&str> for String {
    fn eq(&self, other: &&str) -> bool {
        let ob = (*other).as_bytes();
        let ls = self.data.len();
        let lo = ob.len();
        if ls != lo { return false }
        for i in 0..self.data.len() {
            if self.data[i] != ob[i] { return false }
        }
        true
    }
}

impl Clone for String {
    fn clone(&self) -> Self {
        String::from(self.toStr())
    }
}

impl fmt::Write for String {
    #[inline]
    fn write_str(&mut self, s: &str) -> fmt::Result {
        self.append(s);
        Ok(())
    }

    #[inline]
    fn write_char(&mut self, c: char) -> fmt::Result {
        self.add(c as u8);
        Ok(())
    }
}

impl fmt::Display for String {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", self.toStr())
    }
}

impl Hash for String {
    fn hash(&self) -> usize {
        self.asArray().hash()
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::io::*;
    #[test]
    fn testConversion() {
        {
            let u : u32 = 12345;
            if String::from("12345") != format(format_args!("{}", u)) {
                panic!("fail {}", u);
            }
        }

        {
            let i : i32 = -12345;
            if String::from("-12345") != format(format_args!("{}", i)) {
                panic!("fail {}", i);
            }
        }
    }
}