54 lines
2.5 KiB
C
54 lines
2.5 KiB
C
/*-*- 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/stdio/internal.h"
|
|
#include "libc/stdio/stdio.h"
|
|
|
|
static noinline int slowpath(int c, FILE *f) {
|
|
if (f->beg < f->size) {
|
|
c &= 0xff;
|
|
f->buf[f->beg++] = c;
|
|
if (f->beg == f->size) {
|
|
if (f->writer) {
|
|
if (f->writer(f) == -1) return -1;
|
|
} else if (f->beg == f->size) {
|
|
f->beg = 0;
|
|
}
|
|
}
|
|
return c;
|
|
} else {
|
|
return __fseteof(f);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes byte to stream.
|
|
*
|
|
* @return c (as unsigned char) if written or -1 w/ errno
|
|
*/
|
|
noinstrument int fputcfb(int c, FILE *f) {
|
|
if (f->beg + 1 < f->size) {
|
|
c &= 0xff;
|
|
f->buf[f->beg++] = c;
|
|
return c;
|
|
} else {
|
|
return slowpath(c, f);
|
|
}
|
|
}
|