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Add docs for wctype.h, fix unsafe handling

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This commit is contained in:
Peter Limkilde Svendsen
2024-10-31 12:05:16 +00:00
committed by Jeremy Soller
parent 1d5c02ab92
commit e43a9bd2f6
1 changed files with 99 additions and 66 deletions
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src/header/wctype/mod.rs
+99 -66
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@@ -1,4 +1,11 @@
//! wchar implementation for Redox, following http://pubs.opengroup.org/onlinepubs/7908799/xsh/wctype.h.html
//! `wctype.h` implementation.
//!
//! See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/wctype.h.html>.
// TODO: set this for entire crate when possible
#![deny(unsafe_op_in_unsafe_fn)]
// TODO: *_l functions
use self::casecmp::casemap;
use crate::{c_str::CStr, header::ctype, platform::types::*};
@@ -28,6 +35,36 @@ pub const WCTYPE_XDIGIT: wctype_t = 12;
const WCTRANSUP: wctrans_t = 1 as wctrans_t;
const WCTRANSLW: wctrans_t = 2 as wctrans_t;
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/iswalnum.html>.
#[no_mangle]
pub extern "C" fn iswalnum(wc: wint_t) -> c_int {
c_int::from(iswdigit(wc) != 0 || iswalpha(wc) != 0)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/iswalpha.html>.
#[no_mangle]
pub extern "C" fn iswalpha(wc: wint_t) -> c_int {
c_int::from(alpha::is(wc as usize))
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/iswblank.html>.
#[no_mangle]
pub extern "C" fn iswblank(wc: wint_t) -> c_int {
ctype::isblank(wc as c_int)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/iswcntrl.html>.
#[no_mangle]
pub extern "C" fn iswcntrl(wc: wint_t) -> c_int {
c_int::from(
wc < 32
|| wc.wrapping_sub(0x7f) < 33
|| wc.wrapping_sub(0x2028) < 2
|| wc.wrapping_sub(0xfff9) < 3,
)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/iswctype.html>.
#[no_mangle]
pub extern "C" fn iswctype(wc: wint_t, desc: wctype_t) -> c_int {
match desc {
@@ -47,66 +84,25 @@ pub extern "C" fn iswctype(wc: wint_t, desc: wctype_t) -> c_int {
}
}
#[no_mangle]
pub unsafe extern "C" fn wctype(name: *const c_char) -> wctype_t {
let name_cstr = CStr::from_ptr(name);
match name_cstr.to_bytes() {
b"alnum" => WCTYPE_ALNUM,
b"alpha" => WCTYPE_ALPHA,
b"blank" => WCTYPE_BLANK,
b"cntrl" => WCTYPE_CNTRL,
b"digit" => WCTYPE_DIGIT,
b"graph" => WCTYPE_GRAPH,
b"lower" => WCTYPE_LOWER,
b"print" => WCTYPE_PRINT,
b"punct" => WCTYPE_PUNCT,
b"space" => WCTYPE_SPACE,
b"upper" => WCTYPE_UPPER,
b"xdigit" => WCTYPE_XDIGIT,
_ => 0,
}
}
#[no_mangle]
pub extern "C" fn iswalnum(wc: wint_t) -> c_int {
c_int::from(iswdigit(wc) != 0 || iswalpha(wc) != 0)
}
#[no_mangle]
pub extern "C" fn iswalpha(wc: wint_t) -> c_int {
c_int::from(alpha::is(wc as usize))
}
#[no_mangle]
pub extern "C" fn iswblank(wc: wint_t) -> c_int {
ctype::isblank(wc as c_int)
}
#[no_mangle]
pub extern "C" fn iswcntrl(wc: wint_t) -> c_int {
c_int::from(
wc < 32
|| wc.wrapping_sub(0x7f) < 33
|| wc.wrapping_sub(0x2028) < 2
|| wc.wrapping_sub(0xfff9) < 3,
)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/iswdigit.html>.
#[no_mangle]
pub extern "C" fn iswdigit(wc: wint_t) -> c_int {
c_int::from(wc.wrapping_sub('0' as wint_t) < 10)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/iswgraph.html>.
#[no_mangle]
pub extern "C" fn iswgraph(wc: wint_t) -> c_int {
c_int::from(iswspace(wc) == 0 && iswprint(wc) != 0)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/iswlower.html>.
#[no_mangle]
pub extern "C" fn iswlower(wc: wint_t) -> c_int {
c_int::from(towupper(wc) != wc)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/iswprint.html>.
#[no_mangle]
pub extern "C" fn iswprint(wc: wint_t) -> c_int {
if wc < 0xff {
@@ -123,11 +119,13 @@ pub extern "C" fn iswprint(wc: wint_t) -> c_int {
}
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/iswpunct.html>.
#[no_mangle]
pub extern "C" fn iswpunct(wc: wint_t) -> c_int {
c_int::from(punct::is(wc as usize))
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/iswspace.html>.
#[no_mangle]
pub extern "C" fn iswspace(wc: wint_t) -> c_int {
c_int::from(
@@ -158,36 +156,19 @@ pub extern "C" fn iswspace(wc: wint_t) -> c_int {
)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/iswupper.html>.
#[no_mangle]
pub extern "C" fn iswupper(wc: wint_t) -> c_int {
c_int::from(towlower(wc) != wc)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/iswxdigit.html>.
#[no_mangle]
pub extern "C" fn iswxdigit(wc: wint_t) -> c_int {
c_int::from(wc.wrapping_sub('0' as wint_t) < 10 || (wc | 32).wrapping_sub('a' as wint_t) < 6)
}
#[no_mangle]
pub extern "C" fn towlower(wc: wint_t) -> wint_t {
casemap(wc, 0)
}
#[no_mangle]
pub extern "C" fn towupper(wc: wint_t) -> wint_t {
casemap(wc, 1)
}
#[no_mangle]
pub extern "C" fn wctrans(class: *const c_char) -> wctrans_t {
let class_cstr = unsafe { CStr::from_ptr(class) };
match class_cstr.to_bytes() {
b"toupper" => WCTRANSUP,
b"tolower" => WCTRANSLW,
_ => 0 as wctrans_t,
}
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/towctrans.html>.
#[no_mangle]
pub extern "C" fn towctrans(wc: wint_t, trans: wctrans_t) -> wint_t {
match trans {
@@ -196,3 +177,55 @@ pub extern "C" fn towctrans(wc: wint_t, trans: wctrans_t) -> wint_t {
_ => wc,
}
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/towlower.html>.
#[no_mangle]
pub extern "C" fn towlower(wc: wint_t) -> wint_t {
casemap(wc, 0)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/towupper.html>.
#[no_mangle]
pub extern "C" fn towupper(wc: wint_t) -> wint_t {
casemap(wc, 1)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/wctrans.html>.
///
/// # Safety
/// The caller must ensure that `class` is convertible to a slice reference, up
/// to and including a terminating nul.
#[no_mangle]
pub unsafe extern "C" fn wctrans(class: *const c_char) -> wctrans_t {
let class_cstr = unsafe { CStr::from_ptr(class) };
match class_cstr.to_bytes() {
b"toupper" => WCTRANSUP,
b"tolower" => WCTRANSLW,
_ => 0 as wctrans_t,
}
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/wctype.html>.
///
/// # Safety
/// The caller must ensure that `name` is convertible to a slice reference, up
/// to and including a terminating nul.
#[no_mangle]
pub unsafe extern "C" fn wctype(name: *const c_char) -> wctype_t {
let name_cstr = unsafe { CStr::from_ptr(name) };
match name_cstr.to_bytes() {
b"alnum" => WCTYPE_ALNUM,
b"alpha" => WCTYPE_ALPHA,
b"blank" => WCTYPE_BLANK,
b"cntrl" => WCTYPE_CNTRL,
b"digit" => WCTYPE_DIGIT,
b"graph" => WCTYPE_GRAPH,
b"lower" => WCTYPE_LOWER,
b"print" => WCTYPE_PRINT,
b"punct" => WCTYPE_PUNCT,
b"space" => WCTYPE_SPACE,
b"upper" => WCTYPE_UPPER,
b"xdigit" => WCTYPE_XDIGIT,
_ => 0,
}
}