gvox-sys 1.2.0

Voxel file format parser
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

use std::alloc::*;
use std::cmp::*;
use std::os::raw::*;

#[no_mangle]
pub extern "C" fn malloc(size: usize) -> *mut c_void {
    unsafe {
        let layout = Layout::from_size_align_unchecked(size, 1);
        alloc(layout).cast()
    }
}

#[no_mangle]
pub extern "C" fn calloc(nmemb: usize, size: usize) -> *mut c_void {
    unsafe {
        let layout = Layout::from_size_align_unchecked(size * nmemb, 1);
        alloc(layout).cast()
    }
}

#[no_mangle]
pub unsafe extern "C" fn posix_memalign(
    memptr: *mut *mut c_void,
    alignment: usize,
    size: usize,
) -> c_int {
    unsafe {
        let layout = Layout::from_size_align_unchecked(size, alignment);
        *memptr = alloc(layout).cast();
        0
    }
}

#[no_mangle]
pub unsafe extern "C" fn free(ptr: *mut c_void) {
    let layout = Layout::from_size_align_unchecked(1, 1);
    dealloc(ptr.cast(), layout);
}

#[no_mangle]
pub unsafe extern "C" fn strcpy(dst: *mut c_char, src: *const c_char) -> *mut c_char {
    let mut i = 0;
    loop {
        let char = *src.add(i);
        if char == 0 {
            break;
        } else {
            *dst.add(i) = char;
        }

        i += 1;
    }

    dst
}

#[no_mangle]
pub unsafe extern "C" fn strcmp(str1: *const c_char, str2: *const c_char) -> c_int {
    let a = std::ffi::CStr::from_ptr(str1);
    let b = std::ffi::CStr::from_ptr(str2);
    match a.cmp(b) {
        Ordering::Less => -1,
        Ordering::Equal => 0,
        Ordering::Greater => 1,
    }
}

#[no_mangle]
pub unsafe extern "C" fn strcasecmp(str1: *const c_char, str2: *const c_char) -> c_int {
    let a = std::ffi::CStr::from_ptr(str1)
        .to_string_lossy()
        .to_lowercase();
    let b = std::ffi::CStr::from_ptr(str2)
        .to_string_lossy()
        .to_lowercase();
    match a.cmp(&b) {
        Ordering::Less => -1,
        Ordering::Equal => 0,
        Ordering::Greater => 1,
    }
}

#[no_mangle]
pub unsafe extern "C" fn atof(str: *const c_char) -> f64 {
    std::ffi::CStr::from_ptr(str)
        .to_str()
        .ok()
        .and_then(|x| x.parse().ok())
        .unwrap_or_default()
}

#[no_mangle]
pub unsafe extern "C" fn atoi(str: *const c_char) -> c_int {
    std::ffi::CStr::from_ptr(str)
        .to_str()
        .ok()
        .and_then(|x| x.parse().ok())
        .unwrap_or_default()
}

#[no_mangle]
pub unsafe extern "C" fn abort() {
    std::process::abort();
}