awkrs 0.1.36

Awk implementation in Rust with broad CLI compatibility, parallel records, and experimental Cranelift JIT
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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269

//! MPFR / `-M` helpers: integer truncation, strtonum, intdiv, and string forms without f64 loss.

use crate::error::{Error, Result};
use crate::runtime::{longest_f64_prefix, Runtime, Value};
use rug::float::Round;
use rug::Float;
use rug::Integer;

/// Parse a numeric string to MPFR without going through `f64` (so large integers and full `-M` paths stay consistent).
pub fn numeric_string_to_mpfr(s: &str, prec: u32, round: Round) -> Float {
    let t = s.trim();
    if t.is_empty() {
        return Float::with_val_round(prec, 0, round).0;
    }
    if t.starts_with("0x") || t.starts_with("0X") {
        return match Integer::from_str_radix(&t[2..], 16) {
            Ok(i) => Float::with_val_round(prec, i, round).0,
            Err(_) => Float::with_val_round(prec, 0, round).0,
        };
    }
    // gawk-style: octal only if no `8`/`9` in the digit run (else decimal, e.g. `01238`).
    if t.len() > 1
        && t.starts_with('0')
        && !t.starts_with("0x")
        && !t.starts_with("0X")
        && !t.contains('.')
        && !t.contains('e')
        && !t.contains('E')
        && t.bytes().all(|b| (b'0'..=b'7').contains(&b))
    {
        return match Integer::from_str_radix(t, 8) {
            Ok(i) => Float::with_val_round(prec, i, round).0,
            Err(_) => Float::with_val_round(prec, 0, round).0,
        };
    }
    let dec = longest_f64_prefix(t).unwrap_or("");
    if dec.is_empty() {
        return Float::with_val_round(prec, 0, round).0;
    }
    match Float::parse(dec) {
        Ok(ic) => Float::with_val_round(prec, ic, round).0,
        Err(_) => Float::with_val_round(prec, 0, round).0,
    }
}

/// Coerce any [`Value`] to MPFR for `-M` arithmetic / builtins (strings use [`numeric_string_to_mpfr`], not `parse_number`/`f64`).
pub fn value_to_mpfr(v: &Value, prec: u32, round: Round) -> Float {
    match v {
        Value::Mpfr(f) => f.clone(),
        Value::Num(n) => Float::with_val(prec, *n),
        Value::Str(s) | Value::StrLit(s) => numeric_string_to_mpfr(s, prec, round),
        Value::Regexp(s) => numeric_string_to_mpfr(s, prec, round),
        Value::Uninit => Float::with_val_round(prec, 0, round).0,
        Value::Array(_) => Float::with_val_round(prec, 0, round).0,
    }
}

/// Truncate toward zero as [`Integer`] (gawk-style integer ops).
pub fn float_trunc_integer(f: &Float) -> Integer {
    f.clone()
        .trunc()
        .to_integer_round(Round::Zero)
        .map(|(i, _)| i)
        .unwrap_or_else(|| Integer::from(0))
}

/// Bitwise operands use gawk’s unsigned-64 reinterpretation of the signed truncated value.
pub fn float_trunc_u64(f: &Float) -> u64 {
    float_trunc_integer(f).to_u64_wrapping()
}

pub fn awk_int_value(v: &Value, rt: &Runtime) -> Value {
    if !rt.bignum {
        return Value::Num(v.as_number().trunc());
    }
    let prec = rt.mpfr_prec_bits();
    let round = rt.mpfr_round();
    let f = value_to_mpfr(v, prec, round);
    Value::Mpfr(Float::with_val_round(prec, f.trunc(), round).0)
}

pub fn awk_intdiv_values(a: &Value, b: &Value, rt: &Runtime) -> Result<Value> {
    if !rt.bignum {
        let bf = b.as_number();
        if bf == 0.0 {
            return Err(Error::Runtime("intdiv: division by zero".into()));
        }
        let ai = a.as_number() as i64;
        let bi = bf as i64;
        return Ok(Value::Num((ai / bi) as f64));
    }
    let prec = rt.mpfr_prec_bits();
    let round = rt.mpfr_round();
    let fa = value_to_mpfr(a, prec, round);
    let fb = value_to_mpfr(b, prec, round);
    if fb.is_zero() {
        return Err(Error::Runtime("intdiv: division by zero".into()));
    }
    let ia = float_trunc_integer(&fa);
    let ib = float_trunc_integer(&fb);
    if ib == 0 {
        return Err(Error::Runtime("intdiv: division by zero".into()));
    }
    let q = ia / ib;
    Ok(Value::Mpfr(Float::with_val_round(prec, q, round).0))
}

pub fn awk_strtonum_value(s: &str, rt: &Runtime) -> Value {
    if !rt.bignum {
        return Value::Num(crate::builtins::awk_strtonum(s));
    }
    let prec = rt.mpfr_prec_bits();
    let round = rt.mpfr_round();
    Value::Mpfr(numeric_string_to_mpfr(s, prec, round))
}

pub fn awk_and_values(a: &Value, b: &Value, rt: &Runtime) -> Value {
    if !rt.bignum {
        return Value::Num(crate::builtins::awk_and(a.as_number(), b.as_number()));
    }
    let prec = rt.mpfr_prec_bits();
    let round = rt.mpfr_round();
    let ua = float_trunc_u64(&value_to_mpfr(a, prec, round));
    let ub = float_trunc_u64(&value_to_mpfr(b, prec, round));
    let r = ua & ub;
    Value::Mpfr(Float::with_val_round(prec, Integer::from(r), round).0)
}

pub fn awk_or_values(a: &Value, b: &Value, rt: &Runtime) -> Value {
    if !rt.bignum {
        return Value::Num(crate::builtins::awk_or(a.as_number(), b.as_number()));
    }
    let prec = rt.mpfr_prec_bits();
    let round = rt.mpfr_round();
    let ua = float_trunc_u64(&value_to_mpfr(a, prec, round));
    let ub = float_trunc_u64(&value_to_mpfr(b, prec, round));
    let r = ua | ub;
    Value::Mpfr(Float::with_val_round(prec, Integer::from(r), round).0)
}

pub fn awk_xor_values(a: &Value, b: &Value, rt: &Runtime) -> Value {
    if !rt.bignum {
        return Value::Num(crate::builtins::awk_xor(a.as_number(), b.as_number()));
    }
    let prec = rt.mpfr_prec_bits();
    let round = rt.mpfr_round();
    let ua = float_trunc_u64(&value_to_mpfr(a, prec, round));
    let ub = float_trunc_u64(&value_to_mpfr(b, prec, round));
    let r = ua ^ ub;
    Value::Mpfr(Float::with_val_round(prec, Integer::from(r), round).0)
}

pub fn awk_lshift_values(a: &Value, b: &Value, rt: &Runtime) -> Value {
    if !rt.bignum {
        return Value::Num(crate::builtins::awk_lshift(a.as_number(), b.as_number()));
    }
    let prec = rt.mpfr_prec_bits();
    let round = rt.mpfr_round();
    let x = float_trunc_u64(&value_to_mpfr(a, prec, round));
    let n = float_trunc_u64(&value_to_mpfr(b, prec, round)) & 0x3f;
    let r = x << n;
    Value::Mpfr(Float::with_val_round(prec, Integer::from(r), round).0)
}

pub fn awk_rshift_values(a: &Value, b: &Value, rt: &Runtime) -> Value {
    if !rt.bignum {
        return Value::Num(crate::builtins::awk_rshift(a.as_number(), b.as_number()));
    }
    let prec = rt.mpfr_prec_bits();
    let round = rt.mpfr_round();
    let x = float_trunc_u64(&value_to_mpfr(a, prec, round));
    let n = float_trunc_u64(&value_to_mpfr(b, prec, round)) & 0x3f;
    let r = x >> n;
    Value::Mpfr(Float::with_val_round(prec, Integer::from(r), round).0)
}

pub fn awk_compl_values(a: &Value, rt: &Runtime) -> Value {
    if !rt.bignum {
        return Value::Num(crate::builtins::awk_compl(a.as_number()));
    }
    let prec = rt.mpfr_prec_bits();
    let round = rt.mpfr_round();
    let ua = float_trunc_u64(&value_to_mpfr(a, prec, round));
    let r = !ua;
    Value::Mpfr(Float::with_val_round(prec, Integer::from(r), round).0)
}

/// `%s` conversion for [`Float`]: exact integers as decimal digit strings (no MPFR fixed-point tail);
/// non-integers use MPFR’s string with trailing fractional zeros trimmed.
pub fn mpfr_string_for_percent_s(f: &Float) -> String {
    let tr = f.clone().trunc();
    if &tr == f {
        format!("{}", float_trunc_integer(f))
    } else {
        mpfr_string_trim_trailing_zeros(f.to_string())
    }
}

/// Strip redundant fractional zeros from MPFR’s default string (for `%s` / concat).
pub fn mpfr_string_trim_trailing_zeros(s: String) -> String {
    let mut t = s;
    if !t.contains('.') {
        return t;
    }
    while t.ends_with('0') {
        t.pop();
    }
    if t.ends_with('.') {
        t.pop();
    }
    t
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::format::awk_sprintf_with_decimal;
    use crate::runtime::Runtime;
    use rug::float::Round;
    use std::str::FromStr;

    #[test]
    fn sprintf_percent_d_uses_integer_not_i64_clamp() {
        let mut rt = Runtime::new();
        rt.bignum = true;
        let i = Integer::from_str("9223372036854775808").unwrap(); // i64::MAX + 1
        let f = Float::with_val(rt.mpfr_prec_bits(), i);
        let s = awk_sprintf_with_decimal(
            "%d",
            &[Value::Mpfr(f)],
            '.',
            Some(','),
            Some((rt.mpfr_prec_bits(), Round::Nearest)),
        )
        .unwrap();
        assert_eq!(s, "9223372036854775808");
    }

    #[test]
    fn mpfr_percent_s_whole_number_is_plain_digits() {
        use std::str::FromStr;
        let i = Integer::from_str("1267650600228229401496703205376").unwrap();
        let f = Float::with_val(256, i);
        let s = mpfr_string_for_percent_s(&f);
        assert_eq!(s, "1267650600228229401496703205376");
        assert!(!s.contains('.'));
    }

    /// `i64::MAX + 1` must not round the augend through `f64` (would become 2^63 then +1 → 2^63+1).
    #[test]
    fn numeric_string_i64_max_plus_one_adds_exactly() {
        let mut rt = Runtime::new();
        rt.bignum = true;
        let prec = rt.mpfr_prec_bits();
        let round = rt.mpfr_round();
        let a = numeric_string_to_mpfr("9223372036854775807", prec, round);
        let one = Float::with_val(prec, 1);
        let sum = Float::with_val_round(prec, &a + &one, round).0;
        let s = awk_sprintf_with_decimal(
            "%d",
            &[Value::Mpfr(sum)],
            '.',
            Some(','),
            Some((prec, round)),
        )
        .unwrap();
        assert_eq!(s, "9223372036854775808");
    }
}