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Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
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libc/stdio/fgetws.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/errno.h"
#include "libc/stdio/stdio.h"
/**
* Reads UTF-8 content from stream into UTF-32 buffer.
*/
wchar_t *fgetws(wchar_t *s, int size, FILE *f) {
wchar_t *p = s;
if (size > 0) {
while (--size > 0) {
wint_t c;
if ((c = fgetwc(f)) == -1) {
if (ferror(f) == EINTR) continue;
break;
}
*p++ = c;
if (c == '\n') break;
}
*p = '\0';
}
return (intptr_t)p > (intptr_t)s ? s : NULL;
}