rutie 0.11.3

The tie between Ruby and Rust.
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

use std::ptr;

use crate::{
    binding::fixnum,
    rubysys::io_buffer::{self, rb_io_buffer_flags, rb_off_t},
    types::{c_void, Value},
    util,
};

// `size` zeroed bytes allocated by Ruby; raises `IO::Buffer::AllocationError`
// when that fails.
pub fn new(size: usize) -> Value {
    unsafe { io_buffer::rb_io_buffer_new(ptr::null_mut(), size, io_buffer::RB_IO_BUFFER_INTERNAL) }
}

pub unsafe fn new_external(base: *mut c_void, size: usize, flags: rb_io_buffer_flags) -> Value {
    io_buffer::rb_io_buffer_new(base, size, flags)
}

pub unsafe fn map(io: Value, size: usize, offset: i64, flags: rb_io_buffer_flags) -> Value {
    io_buffer::rb_io_buffer_map(io, size, offset as rb_off_t, flags)
}

// Raises `IO::Buffer::LockedError` when already locked.
pub fn lock(buffer: Value) -> Value {
    unsafe { io_buffer::rb_io_buffer_lock(buffer) }
}

// Raises `IO::Buffer::LockedError` when not locked.
pub fn unlock(buffer: Value) -> Value {
    unsafe { io_buffer::rb_io_buffer_unlock(buffer) }
}

pub fn try_unlock(buffer: Value) -> bool {
    util::c_int_to_bool(unsafe { io_buffer::rb_io_buffer_try_unlock(buffer) })
}

// Raises `IO::Buffer::LockedError` when locked.
pub fn free(buffer: Value) -> Value {
    unsafe { io_buffer::rb_io_buffer_free(buffer) }
}

// The memory, its size and the flags; a null pointer, `0` and `0` for a
// buffer with no (valid) memory. Never raises.
pub fn get_bytes(buffer: Value) -> (*mut u8, usize, rb_io_buffer_flags) {
    let mut base = ptr::null_mut();
    let mut size = 0;
    let flags = unsafe { io_buffer::rb_io_buffer_get_bytes(buffer, &mut base, &mut size) };

    (base as *mut u8, size, flags)
}

// Raises for a buffer with no (valid) memory, except on Ruby 3.3, which
// returns a null pointer.
pub fn get_bytes_for_reading(buffer: Value) -> (*const u8, usize) {
    let mut base = ptr::null();
    let mut size = 0;

    unsafe { io_buffer::rb_io_buffer_get_bytes_for_reading(buffer, &mut base, &mut size) };

    (base as *const u8, size)
}

// Like `get_bytes_for_reading`, and raises `IO::Buffer::AccessError` for a
// read-only buffer.
pub fn get_bytes_for_writing(buffer: Value) -> (*mut u8, usize) {
    let mut base = ptr::null_mut();
    let mut size = 0;

    unsafe { io_buffer::rb_io_buffer_get_bytes_for_writing(buffer, &mut base, &mut size) };

    (base as *mut u8, size)
}

pub fn transfer(buffer: Value) -> Value {
    unsafe { io_buffer::rb_io_buffer_transfer(buffer) }
}

pub fn resize(buffer: Value, size: usize) {
    unsafe { io_buffer::rb_io_buffer_resize(buffer, size) }
}

// The caller checks that `offset + length` does not overflow.
pub fn clear(buffer: Value, value: u8, offset: usize, length: usize) {
    unsafe { io_buffer::rb_io_buffer_clear(buffer, value, offset, length) }
}

// Ruby 3.1 always reads into and writes from the start of the buffer, so an
// offset is a slice of the buffer from `offset` (which shares its memory).
// The caller checks that `offset` is within the buffer.
#[cfg(ruby_3_1)]
fn from_offset(buffer: Value, offset: usize) -> Value {
    if offset == 0 {
        return buffer;
    }

    let (_, size, _) = get_bytes(buffer);
    let arguments = [
        fixnum::usize_to_num(offset),
        fixnum::usize_to_num(size - offset),
    ];

    crate::binding::vm::call_method(buffer, "slice", &arguments)
}

// The byte count as an Integer, or a negative `errno`.
#[cfg(ruby_3_1)]
pub fn read(buffer: Value, io: Value, length: usize, offset: usize) -> Value {
    unsafe { io_buffer::rb_io_buffer_read(from_offset(buffer, offset), io, length) }
}

#[cfg(ruby_gte_3_2)]
pub fn read(buffer: Value, io: Value, length: usize, offset: usize) -> Value {
    unsafe { io_buffer::rb_io_buffer_read(buffer, io, length, offset) }
}

#[cfg(ruby_3_1)]
pub fn pread(buffer: Value, io: Value, from: i64, length: usize, offset: usize) -> Value {
    unsafe { io_buffer::rb_io_buffer_pread(from_offset(buffer, offset), io, length, from) }
}

#[cfg(ruby_gte_3_2)]
pub fn pread(buffer: Value, io: Value, from: i64, length: usize, offset: usize) -> Value {
    unsafe { io_buffer::rb_io_buffer_pread(buffer, io, from, length, offset) }
}

#[cfg(ruby_3_1)]
pub fn write(buffer: Value, io: Value, length: usize, offset: usize) -> Value {
    unsafe { io_buffer::rb_io_buffer_write(from_offset(buffer, offset), io, length) }
}

#[cfg(ruby_gte_3_2)]
pub fn write(buffer: Value, io: Value, length: usize, offset: usize) -> Value {
    unsafe { io_buffer::rb_io_buffer_write(buffer, io, length, offset) }
}

#[cfg(ruby_3_1)]
pub fn pwrite(buffer: Value, io: Value, from: i64, length: usize, offset: usize) -> Value {
    unsafe { io_buffer::rb_io_buffer_pwrite(from_offset(buffer, offset), io, length, from) }
}

#[cfg(ruby_gte_3_2)]
pub fn pwrite(buffer: Value, io: Value, from: i64, length: usize, offset: usize) -> Value {
    unsafe { io_buffer::rb_io_buffer_pwrite(buffer, io, from, length, offset) }
}