113 lines
3.8 KiB
C
113 lines
3.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=8 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/alg/arraylist.h"
|
|
#include "libc/bits/bits.h"
|
|
#include "libc/bits/pushpop.h"
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/macros.h"
|
|
#include "libc/mem/mem.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/stdio/internal.h"
|
|
#include "libc/stdio/stdio.h"
|
|
#include "libc/sysv/consts/o.h"
|
|
|
|
struct StdioFlushHandles {
|
|
size_t i, n;
|
|
FILE **p;
|
|
};
|
|
|
|
struct StdioFlush {
|
|
struct StdioFlushHandles handles;
|
|
FILE *handles_initmem[8];
|
|
};
|
|
|
|
static struct StdioFlush g_fflush;
|
|
|
|
/**
|
|
* Blocks until data from stream buffer is written out.
|
|
*
|
|
* @param f is the stream handle
|
|
* @return number of bytes written or -1 on error
|
|
* @see fwritebuf
|
|
*/
|
|
int fflush(FILE *f) {
|
|
size_t i;
|
|
int res, wrote;
|
|
res = 0;
|
|
if (!f) {
|
|
for (i = g_fflush.handles.i; i; --i) {
|
|
if ((f = g_fflush.handles.p[i - 1])) {
|
|
if ((wrote = fflush(f)) != -1) {
|
|
res += wrote;
|
|
} else {
|
|
res = -1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} else if (f->fd != -1 && (f->iomode & O_WRONLY)) {
|
|
if (!f->state) {
|
|
while (f->beg != f->end) {
|
|
if ((wrote = fwritebuf(f)) != -1) {
|
|
res += wrote;
|
|
} else {
|
|
res = -1;
|
|
break;
|
|
}
|
|
}
|
|
} else if (f->state != -1) {
|
|
res = fseterr(f, f->state);
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
textstartup int _fflushregister(FILE *f) {
|
|
size_t i;
|
|
struct StdioFlush *sf;
|
|
sf = &g_fflush;
|
|
sf = sf;
|
|
if (!sf->handles.p) {
|
|
sf->handles.p = &sf->handles_initmem[0];
|
|
pushmov(&sf->handles.n, ARRAYLEN(sf->handles_initmem));
|
|
__cxa_atexit(fflush, NULL, NULL);
|
|
}
|
|
for (i = sf->handles.i; i; --i) {
|
|
if (!sf->handles.p[i - 1]) {
|
|
sf->handles.p[i - 1] = f;
|
|
return 0;
|
|
}
|
|
}
|
|
return append(&sf->handles, &f);
|
|
}
|
|
|
|
void _fflushunregister(FILE *f) {
|
|
size_t i;
|
|
struct StdioFlush *sf;
|
|
sf = &g_fflush;
|
|
sf = pushpop(sf);
|
|
for (i = sf->handles.i; i; --i) {
|
|
if (sf->handles.p[i - 1] == f) {
|
|
pushmov(&sf->handles.p[i - 1], NULL);
|
|
return;
|
|
}
|
|
}
|
|
}
|