Jeremy Soller
860 lines
21 KiB
Rust
860 lines
21 KiB
Rust
//! wchar implementation for Redox, following http://pubs.opengroup.org/onlinepubs/7908799/xsh/wchar.h.html
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use core::{char, ffi::VaList as va_list, mem, ptr, slice, usize};
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use crate::{
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header::{
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ctype::isspace, errno::ERANGE, stdio::*, stdlib::MB_CUR_MAX, string, time::*, wctype::*,
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},
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platform::{self, types::*},
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};
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mod utf8;
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mod wprintf;
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#[repr(C)]
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#[derive(Clone, Copy)]
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pub struct mbstate_t;
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#[no_mangle]
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pub unsafe extern "C" fn btowc(c: c_int) -> wint_t {
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//Check for EOF
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if c == EOF {
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return WEOF;
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}
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let uc = c as u8;
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let c = uc as c_char;
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let mut ps: mbstate_t = mbstate_t;
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let mut wc: wchar_t = 0;
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let saved_errno = platform::errno;
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let status = mbrtowc(&mut wc, &c as *const c_char, 1, &mut ps);
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if status == usize::max_value() || status == usize::max_value() - 1 {
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platform::errno = saved_errno;
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return WEOF;
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}
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wc as wint_t
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}
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#[no_mangle]
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pub unsafe extern "C" fn fgetwc(stream: *mut FILE) -> wint_t {
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//TODO: Real multibyte
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btowc(fgetc(stream))
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}
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#[no_mangle]
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pub unsafe extern "C" fn fgetws(ws: *mut wchar_t, n: c_int, stream: *mut FILE) -> *mut wchar_t {
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//TODO: lock
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let mut i = 0;
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while ((i + 1) as c_int) < n {
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let wc = fgetwc(stream);
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if wc == WEOF {
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return ptr::null_mut();
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}
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*ws.add(i) = wc as wchar_t;
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i += 1;
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}
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while (i as c_int) < n {
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*ws.add(i) = 0;
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i += 1;
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}
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ws
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}
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#[no_mangle]
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pub unsafe extern "C" fn fputwc(wc: wchar_t, stream: *mut FILE) -> wint_t {
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//Convert wchar_t to multibytes first
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static mut INTERNAL: mbstate_t = mbstate_t;
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let mut bytes: [c_char; MB_CUR_MAX as usize] = [0; MB_CUR_MAX as usize];
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let amount = wcrtomb(bytes.as_mut_ptr(), wc, &mut INTERNAL);
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for i in 0..amount {
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fputc(bytes[i] as c_int, &mut *stream);
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}
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wc as wint_t
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}
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#[no_mangle]
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pub unsafe extern "C" fn fputws(ws: *const wchar_t, stream: *mut FILE) -> c_int {
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let mut i = 0;
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loop {
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let wc = *ws.add(i);
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if wc == 0 {
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return 0;
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}
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if fputwc(wc, stream) == WEOF {
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return -1;
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}
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i += 1;
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}
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}
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#[no_mangle]
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pub unsafe extern "C" fn fwide(stream: *mut FILE, mode: c_int) -> c_int {
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(*stream).try_set_orientation(mode)
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}
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#[no_mangle]
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pub unsafe extern "C" fn getwc(stream: *mut FILE) -> wint_t {
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fgetwc(stream)
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}
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#[no_mangle]
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pub unsafe extern "C" fn getwchar() -> wint_t {
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fgetwc(stdin)
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}
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#[no_mangle]
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pub unsafe extern "C" fn mbsinit(ps: *const mbstate_t) -> c_int {
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//Add a check for the state maybe
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if ps.is_null() {
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1
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} else {
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0
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}
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}
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#[no_mangle]
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pub unsafe extern "C" fn mbrlen(s: *const c_char, n: size_t, ps: *mut mbstate_t) -> size_t {
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static mut INTERNAL: mbstate_t = mbstate_t;
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mbrtowc(ptr::null_mut(), s, n, &mut INTERNAL)
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}
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//Only works for UTF8 at the moment
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#[no_mangle]
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pub unsafe extern "C" fn mbrtowc(
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pwc: *mut wchar_t,
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s: *const c_char,
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n: size_t,
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ps: *mut mbstate_t,
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) -> size_t {
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static mut INTERNAL: mbstate_t = mbstate_t;
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if ps.is_null() {
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let ps = &mut INTERNAL;
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}
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if s.is_null() {
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let xs: [c_char; 1] = [0];
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utf8::mbrtowc(pwc, &xs[0] as *const c_char, 1, ps)
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} else {
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utf8::mbrtowc(pwc, s, n, ps)
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}
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}
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//Convert a multibyte string to a wide string with a limited amount of bytes
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//Required for in POSIX.1-2008
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#[no_mangle]
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pub unsafe extern "C" fn mbsnrtowcs(
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dst_ptr: *mut wchar_t,
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src_ptr: *mut *const c_char,
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src_len: size_t,
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dst_len: size_t,
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ps: *mut mbstate_t,
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) -> size_t {
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static mut INTERNAL: mbstate_t = mbstate_t;
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if ps.is_null() {
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let ps = &mut INTERNAL;
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}
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let mut src = *src_ptr;
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let mut dst_offset: usize = 0;
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let mut src_offset: usize = 0;
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while (dst_ptr.is_null() || dst_offset < dst_len) && src_offset < src_len {
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let ps_copy = *ps;
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let mut wc: wchar_t = 0;
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let amount = mbrtowc(&mut wc, src.add(src_offset), src_len - src_offset, ps);
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// Stop in the event a decoding error occured.
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if amount == -1isize as usize {
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*src_ptr = src.add(src_offset);
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return 1isize as usize;
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}
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// Stop decoding early in the event we encountered a partial character.
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if amount == -2isize as usize {
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*ps = ps_copy;
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break;
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}
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// Store the decoded wide character in the destination buffer.
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if !dst_ptr.is_null() {
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*dst_ptr.add(dst_offset) = wc;
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}
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// Stop decoding after decoding a null character and return a NULL
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// source pointer to the caller, not including the null character in the
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// number of characters stored in the destination buffer.
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if wc == 0 {
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src = ptr::null();
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src_offset = 0;
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break;
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}
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dst_offset += 1;
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src_offset += amount;
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}
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*src_ptr = src.add(src_offset);
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dst_offset
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}
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//Convert a multibyte string to a wide string
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#[no_mangle]
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pub unsafe extern "C" fn mbsrtowcs(
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dst: *mut wchar_t,
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src: *mut *const c_char,
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len: size_t,
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ps: *mut mbstate_t,
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) -> size_t {
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mbsnrtowcs(dst, src, size_t::max_value(), len, ps)
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}
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#[no_mangle]
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pub unsafe extern "C" fn putwc(wc: wchar_t, stream: *mut FILE) -> wint_t {
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fputwc(wc, &mut *stream)
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}
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#[no_mangle]
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pub unsafe extern "C" fn putwchar(wc: wchar_t) -> wint_t {
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fputwc(wc, &mut *stdout)
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}
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// #[no_mangle]
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pub extern "C" fn swscanf(s: *const wchar_t, format: *const wchar_t, ap: va_list) -> c_int {
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unimplemented!();
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}
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/// Push wide character `wc` back onto `stream` so it'll be read next
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#[no_mangle]
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pub unsafe extern "C" fn ungetwc(wc: wint_t, stream: &mut FILE) -> wint_t {
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if wc == WEOF {
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return wc;
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}
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static mut INTERNAL: mbstate_t = mbstate_t;
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let mut bytes: [c_char; MB_CUR_MAX as usize] = [0; MB_CUR_MAX as usize];
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let amount = wcrtomb(bytes.as_mut_ptr(), wc as wchar_t, &mut INTERNAL);
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if amount == usize::MAX {
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return WEOF;
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}
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for i in 0..amount {
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ungetc(bytes[i] as c_int, &mut *stream);
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}
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wc
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}
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#[no_mangle]
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pub unsafe extern "C" fn vfwprintf(stream: *mut FILE, format: *const wchar_t, arg: va_list) -> c_int {
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let mut stream = (*stream).lock();
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if let Err(_) = (*stream).try_set_wide_orientation_unlocked() {
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return -1;
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}
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wprintf::wprintf(&mut *stream, format, arg)
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}
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#[no_mangle]
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pub unsafe extern "C" fn vwprintf(format: *const wchar_t, arg: va_list) -> c_int {
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vfwprintf(&mut *stdout, format, arg)
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}
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#[no_mangle]
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pub unsafe extern "C" fn vswprintf(
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s: *mut wchar_t,
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n: size_t,
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format: *const wchar_t,
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arg: va_list,
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) -> c_int {
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//TODO: implement vswprintf. This is not as simple as wprintf, since the output is not UTF-8
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// but instead is a wchar array.
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eprintln!("vswprintf not implemented");
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-1
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}
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//widechar to multibyte
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#[no_mangle]
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pub unsafe extern "C" fn wcrtomb(s: *mut c_char, wc: wchar_t, ps: *mut mbstate_t) -> size_t {
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let mut buffer: [c_char; MB_CUR_MAX as usize] = [0; MB_CUR_MAX as usize];
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let (s_cpy, wc_cpy) = if s.is_null() {
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(buffer.as_mut_ptr(), 0)
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} else {
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(s, wc)
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};
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utf8::wcrtomb(s_cpy, wc_cpy, ps)
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}
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#[no_mangle]
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pub unsafe extern "C" fn wcsrtombs(
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mut s: *mut c_char,
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ws: *mut *const wchar_t,
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mut n: size_t,
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st: *mut mbstate_t,
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) -> size_t {
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let mut ws2 = 0 as *const wchar_t;
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let mut buf = [0i8; 4];
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let N = n;
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let mut l = 0usize;
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if s.is_null() {
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n = 0;
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ws2 = *ws;
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while *ws2 != 0 {
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if *ws2 >= 0x80 {
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l = wcrtomb(buf.as_mut_ptr(), *ws2, ptr::null_mut());
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if l.wrapping_add(1) == 0 {
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return usize::MAX;
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}
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n = n.wrapping_add(l);
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} else {
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n = n.wrapping_add(1);
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}
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ws2 = ws2.offset(1);
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}
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return n;
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}
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while n >= 4 {
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if (**ws).wrapping_sub(1) >= 0x7f {
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if **ws == 0 {
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*s = 0;
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*ws = 0 as *const wchar_t;
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return N.wrapping_sub(n);
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}
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l = wcrtomb(s, **ws, ptr::null_mut());
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if l.wrapping_add(1) == 0 {
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return usize::MAX;
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}
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s = s.offset(l as isize);
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n = n.wrapping_sub(l);
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} else {
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let new_s = s;
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s = s.offset(1);
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*new_s = **ws as c_char;
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n = n.wrapping_sub(1);
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}
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*ws = (*ws).offset(1);
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}
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while n != 0 {
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if (**ws).wrapping_sub(1) >= 0x7f {
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if **ws == 0 {
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*s = 0;
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*ws = 0 as *const wchar_t;
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return N.wrapping_sub(n);
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}
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l = wcrtomb(buf.as_mut_ptr(), **ws, ptr::null_mut());
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if l.wrapping_add(1) == 0 {
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return usize::MAX;
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}
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if l > n {
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return N.wrapping_sub(n);
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}
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wcrtomb(s, **ws, ptr::null_mut());
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s = s.offset(l as isize);
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n = n.wrapping_sub(l) as size_t;
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} else {
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let new_s = s;
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s = s.offset(1);
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*new_s = **ws as c_char;
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n = n.wrapping_sub(1);
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}
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*ws = (*ws).offset(1);
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}
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return N;
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}
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#[no_mangle]
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pub unsafe extern "C" fn wcscat(ws1: *mut wchar_t, ws2: *const wchar_t) -> *mut wchar_t {
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wcsncat(ws1, ws2, usize::MAX)
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}
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#[no_mangle]
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pub unsafe extern "C" fn wcschr(ws: *const wchar_t, wc: wchar_t) -> *mut wchar_t {
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let mut i = 0;
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loop {
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if *ws.add(i) == wc {
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return ws.add(i) as *mut wchar_t;
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} else if *ws.add(i) == 0 {
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return ptr::null_mut();
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}
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i += 1;
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}
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}
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#[no_mangle]
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pub unsafe extern "C" fn wcscmp(ws1: *const wchar_t, ws2: *const wchar_t) -> c_int {
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wcsncmp(ws1, ws2, usize::MAX)
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}
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#[no_mangle]
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pub unsafe extern "C" fn wcscoll(ws1: *const wchar_t, ws2: *const wchar_t) -> c_int {
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//TODO: locale comparison
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wcscmp(ws1, ws2)
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}
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#[no_mangle]
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pub unsafe extern "C" fn wcscpy(ws1: *mut wchar_t, ws2: *const wchar_t) -> *mut wchar_t {
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let mut i = 0;
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loop {
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let wc = *ws2.add(i);
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*ws1.add(i) = wc;
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i += 1;
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if wc == 0 {
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return ws1;
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}
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}
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}
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unsafe fn inner_wcsspn(mut wcs: *const wchar_t, set: *const wchar_t, reject: bool) -> size_t {
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let mut count = 0;
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while (*wcs) != 0 && wcschr(set, *wcs).is_null() == reject {
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wcs = wcs.add(1);
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count += 1;
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}
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count
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}
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#[no_mangle]
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pub unsafe extern "C" fn wcscspn(wcs: *const wchar_t, set: *const wchar_t) -> size_t {
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inner_wcsspn(wcs, set, true)
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}
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// #[no_mangle]
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pub extern "C" fn wcsftime(
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wcs: *mut wchar_t,
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maxsize: size_t,
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format: *const wchar_t,
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timptr: *mut tm,
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) -> size_t {
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unimplemented!();
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}
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#[no_mangle]
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pub unsafe extern "C" fn wcslen(ws: *const wchar_t) -> size_t {
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let mut i = 0;
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loop {
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if *ws.add(i) == 0 {
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return i;
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}
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i += 1;
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}
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}
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#[no_mangle]
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pub unsafe extern "C" fn wcsncat(
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ws1: *mut wchar_t,
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ws2: *const wchar_t,
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n: size_t,
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) -> *mut wchar_t {
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let len = wcslen(ws1);
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let dest = ws1.add(len);
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let mut i = 0;
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while i < n {
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let wc = *ws2.add(i);
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if wc == 0 {
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break;
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}
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*dest.add(i) = wc;
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i += 1;
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}
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*dest.add(i) = 0;
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ws1
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}
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#[no_mangle]
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pub unsafe extern "C" fn wcsncmp(ws1: *const wchar_t, ws2: *const wchar_t, n: size_t) -> c_int {
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for i in 0..n {
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let wc1 = *ws1.add(i);
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let wc2 = *ws2.add(i);
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if wc1 != wc2 {
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return wc1 - wc2;
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} else if wc1 == 0 {
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break;
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}
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}
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0
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}
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#[no_mangle]
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pub unsafe extern "C" fn wcsncpy(
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ws1: *mut wchar_t,
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ws2: *const wchar_t,
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n: size_t,
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) -> *mut wchar_t {
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let mut i = 0;
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while i < n {
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let wc = *ws2.add(i);
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*ws1.add(i) = wc;
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i += 1;
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if wc == 0 {
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break;
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}
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}
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while i < n {
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*ws1.add(i) = 0;
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i += 1;
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}
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ws1
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}
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#[no_mangle]
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pub unsafe extern "C" fn wcspbrk(mut wcs: *const wchar_t, set: *const wchar_t) -> *mut wchar_t {
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wcs = wcs.add(wcscspn(wcs, set));
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if *wcs == 0 {
|
|
ptr::null_mut()
|
|
} else {
|
|
// Once again, C wants us to transmute a const pointer to a
|
|
// mutable one...
|
|
wcs as *mut _
|
|
}
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub unsafe extern "C" fn wcsrchr(ws1: *const wchar_t, wc: wchar_t) -> *mut wchar_t {
|
|
let mut last_matching_wc = 0 as *const wchar_t;
|
|
let mut i = 0;
|
|
|
|
while *ws1.add(i) != 0 {
|
|
if *ws1.add(i) == wc {
|
|
last_matching_wc = ws1.add(i);
|
|
}
|
|
i += 1;
|
|
}
|
|
|
|
last_matching_wc as *mut wchar_t
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub unsafe extern "C" fn wcsspn(wcs: *const wchar_t, set: *const wchar_t) -> size_t {
|
|
inner_wcsspn(wcs, set, false)
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub unsafe extern "C" fn wcsstr(ws1: *const wchar_t, ws2: *const wchar_t) -> *mut wchar_t {
|
|
// Get length of ws2, not including null terminator
|
|
let ws2_len = wcslen(ws2);
|
|
|
|
// The standard says that we must return ws1 if ws2 has length 0
|
|
if ws2_len == 0 {
|
|
ws1 as *mut wchar_t
|
|
} else {
|
|
let ws1_len = wcslen(ws1);
|
|
|
|
// Construct slices without null terminator
|
|
let ws1_slice = slice::from_raw_parts(ws1, ws1_len);
|
|
let ws2_slice = slice::from_raw_parts(ws2, ws2_len);
|
|
|
|
/* Sliding ws2-sized window iterator on ws1. The iterator
|
|
* returns None if ws2 is longer than ws1. */
|
|
let mut ws1_windows = ws1_slice.windows(ws2_len);
|
|
|
|
/* Find the first offset into ws1 where the window is equal to
|
|
* the ws2 contents. Return null pointer if no match is found. */
|
|
match ws1_windows.position(|ws1_window| ws1_window == ws2_slice) {
|
|
Some(pos) => ws1.add(pos) as *mut wchar_t,
|
|
None => ptr::null_mut(),
|
|
}
|
|
}
|
|
}
|
|
|
|
macro_rules! skipws {
|
|
($ptr:expr) => {
|
|
while isspace(*$ptr) != 0 {
|
|
$ptr = $ptr.add(1);
|
|
}
|
|
};
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub unsafe extern "C" fn wcstod(mut ptr: *const wchar_t, end: *mut *mut wchar_t) -> c_double {
|
|
const RADIX: u32 = 10;
|
|
|
|
skipws!(ptr);
|
|
let negative = *ptr == '-' as wchar_t;
|
|
if negative {
|
|
ptr = ptr.add(1);
|
|
}
|
|
|
|
let mut result: c_double = 0.0;
|
|
while let Some(digit) = char::from_u32(*ptr as _).and_then(|c| c.to_digit(RADIX)) {
|
|
result *= 10.0;
|
|
if negative {
|
|
result -= digit as c_double;
|
|
} else {
|
|
result += digit as c_double;
|
|
}
|
|
ptr = ptr.add(1);
|
|
}
|
|
if *ptr == '.' as wchar_t {
|
|
ptr = ptr.add(1);
|
|
|
|
let mut scale = 1.0;
|
|
while let Some(digit) = char::from_u32(*ptr as _).and_then(|c| c.to_digit(RADIX)) {
|
|
scale /= 10.0;
|
|
if negative {
|
|
result -= digit as c_double * scale;
|
|
} else {
|
|
result += digit as c_double * scale;
|
|
}
|
|
ptr = ptr.add(1);
|
|
}
|
|
}
|
|
if !end.is_null() {
|
|
*end = ptr as *mut _;
|
|
}
|
|
result
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub unsafe extern "C" fn wcstok(
|
|
mut wcs: *mut wchar_t,
|
|
delim: *const wchar_t,
|
|
state: *mut *mut wchar_t,
|
|
) -> *mut wchar_t {
|
|
// Choose starting position
|
|
if wcs.is_null() {
|
|
if (*state).is_null() {
|
|
// There was no next token
|
|
return ptr::null_mut();
|
|
}
|
|
wcs = *state;
|
|
}
|
|
|
|
// Advance past any delimiters
|
|
wcs = wcs.add(wcsspn(wcs, delim));
|
|
|
|
// Check end
|
|
if *wcs == 0 {
|
|
*state = ptr::null_mut();
|
|
return ptr::null_mut();
|
|
}
|
|
|
|
// Advance *to* any delimiters
|
|
let end = wcspbrk(wcs, delim);
|
|
if end.is_null() {
|
|
*state = ptr::null_mut();
|
|
} else {
|
|
*end = 0;
|
|
*state = end.add(1);
|
|
}
|
|
wcs
|
|
}
|
|
|
|
macro_rules! strtou_impl {
|
|
($type:ident, $ptr:expr, $base:expr) => {
|
|
strtou_impl!($type, $ptr, $base, false)
|
|
};
|
|
($type:ident, $ptr:expr, $base:expr, $negative:expr) => {{
|
|
if $base == 16 && *$ptr == '0' as wchar_t && *$ptr.add(1) | 0x20 == 'x' as wchar_t {
|
|
$ptr = $ptr.add(2);
|
|
}
|
|
|
|
let mut result: $type = 0;
|
|
while let Some(digit) = char::from_u32(*$ptr as u32).and_then(|c| c.to_digit($base as u32))
|
|
{
|
|
let new = result.checked_mul($base as $type).and_then(|result| {
|
|
if $negative {
|
|
result.checked_sub(digit as $type)
|
|
} else {
|
|
result.checked_add(digit as $type)
|
|
}
|
|
});
|
|
result = match new {
|
|
Some(new) => new,
|
|
None => {
|
|
platform::errno = ERANGE;
|
|
return !0;
|
|
}
|
|
};
|
|
|
|
$ptr = $ptr.add(1);
|
|
}
|
|
result
|
|
}};
|
|
}
|
|
macro_rules! strto_impl {
|
|
($type:ident, $ptr:expr, $base:expr) => {{
|
|
let negative = *$ptr == '-' as wchar_t;
|
|
if negative {
|
|
$ptr = $ptr.add(1);
|
|
}
|
|
strtou_impl!($type, $ptr, $base, negative)
|
|
}};
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub unsafe extern "C" fn wcstol(
|
|
mut ptr: *const wchar_t,
|
|
end: *mut *mut wchar_t,
|
|
base: c_int,
|
|
) -> c_long {
|
|
skipws!(ptr);
|
|
let result = strto_impl!(c_long, ptr, base);
|
|
if !end.is_null() {
|
|
*end = ptr as *mut _;
|
|
}
|
|
result
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub unsafe extern "C" fn wcstoul(
|
|
mut ptr: *const wchar_t,
|
|
end: *mut *mut wchar_t,
|
|
base: c_int,
|
|
) -> c_ulong {
|
|
skipws!(ptr);
|
|
let result = strtou_impl!(c_ulong, ptr, base);
|
|
if !end.is_null() {
|
|
*end = ptr as *mut _;
|
|
}
|
|
result
|
|
}
|
|
|
|
// #[no_mangle]
|
|
pub extern "C" fn wcswcs(ws1: *const wchar_t, ws2: *const wchar_t) -> *mut wchar_t {
|
|
unimplemented!();
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub unsafe extern "C" fn wcswidth(pwcs: *const wchar_t, n: size_t) -> c_int {
|
|
let mut total_width = 0;
|
|
for i in 0..n {
|
|
let wc_width = wcwidth(*pwcs.add(i));
|
|
if wc_width < 0 {
|
|
return -1;
|
|
}
|
|
total_width += wc_width;
|
|
}
|
|
total_width
|
|
}
|
|
|
|
// #[no_mangle]
|
|
pub extern "C" fn wcsxfrm(ws1: *mut wchar_t, ws2: *const wchar_t, n: size_t) -> size_t {
|
|
unimplemented!();
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub extern "C" fn wctob(c: wint_t) -> c_int {
|
|
if c <= 0x7F {
|
|
c as c_int
|
|
} else {
|
|
EOF
|
|
}
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub extern "C" fn wcwidth(wc: wchar_t) -> c_int {
|
|
match char::from_u32(wc as u32) {
|
|
Some(c) => match unicode_width::UnicodeWidthChar::width(c) {
|
|
Some(width) => width as c_int,
|
|
None => -1,
|
|
},
|
|
None => -1,
|
|
}
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub unsafe extern "C" fn wmemchr(ws: *const wchar_t, wc: wchar_t, n: size_t) -> *mut wchar_t {
|
|
for i in 0..n {
|
|
if *ws.add(i) == wc {
|
|
return ws.add(i) as *mut wchar_t;
|
|
}
|
|
}
|
|
ptr::null_mut()
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub unsafe extern "C" fn wmemcmp(ws1: *const wchar_t, ws2: *const wchar_t, n: size_t) -> c_int {
|
|
for i in 0..n {
|
|
let wc1 = *ws1.add(i);
|
|
let wc2 = *ws2.add(i);
|
|
if wc1 != wc2 {
|
|
return wc1 - wc2;
|
|
}
|
|
}
|
|
0
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub unsafe extern "C" fn wmemcpy(
|
|
ws1: *mut wchar_t,
|
|
ws2: *const wchar_t,
|
|
n: size_t,
|
|
) -> *mut wchar_t {
|
|
string::memcpy(
|
|
ws1 as *mut c_void,
|
|
ws2 as *const c_void,
|
|
n * mem::size_of::<wchar_t>(),
|
|
) as *mut wchar_t
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub unsafe extern "C" fn wmemmove(
|
|
ws1: *mut wchar_t,
|
|
ws2: *const wchar_t,
|
|
n: size_t,
|
|
) -> *mut wchar_t {
|
|
string::memmove(
|
|
ws1 as *mut c_void,
|
|
ws2 as *const c_void,
|
|
n * mem::size_of::<wchar_t>(),
|
|
) as *mut wchar_t
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub unsafe extern "C" fn wmemset(ws: *mut wchar_t, wc: wchar_t, n: size_t) -> *mut wchar_t {
|
|
for i in 0..n {
|
|
*ws.add(i) = wc;
|
|
}
|
|
ws
|
|
}
|
|
|
|
// #[no_mangle]
|
|
pub extern "C" fn wscanf(format: *const wchar_t, ap: va_list) -> c_int {
|
|
unimplemented!();
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub extern "C" fn wcscasecmp(mut s1: *const wchar_t, mut s2: *const wchar_t) -> c_int {
|
|
unsafe {
|
|
while *s1 != 0 && *s2 != 0 {
|
|
if towlower(*s1 as wint_t) != towlower(*s2 as wint_t) {
|
|
break;
|
|
}
|
|
s1 = s1.add(1);
|
|
s2 = s2.add(1);
|
|
}
|
|
let result = towlower(*s1 as wint_t).wrapping_sub(towlower(*s2 as wint_t));
|
|
return result as c_int;
|
|
}
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub extern "C" fn wcsncasecmp(mut s1: *const wchar_t, mut s2: *const wchar_t, n: size_t) -> c_int {
|
|
if n == 0 {
|
|
return 0;
|
|
}
|
|
unsafe {
|
|
for _ in 0..n {
|
|
if *s1 == 0 || *s2 == 0 || towlower(*s1 as wint_t) != towlower(*s2 as wint_t) {
|
|
return towlower(*s1 as wint_t).wrapping_sub(towlower(*s2 as wint_t)) as c_int;
|
|
}
|
|
s1 = s1.add(1);
|
|
s2 = s2.add(1);
|
|
}
|
|
return 0;
|
|
}
|
|
}
|