48 lines
2.4 KiB
C
48 lines
2.4 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=8 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/fmt/fmt.h"
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#include "libc/limits.h"
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#include "libc/stdio/fputc.h"
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#include "libc/stdio/stdio.h"
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#include "libc/sysv/errfuns.h"
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struct state {
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FILE *const f;
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unsigned toto;
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};
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static int vfprintfputchar(int c, struct state *st) {
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if (st->toto <= INT_MAX) {
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st->toto++;
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return __fputc(c, st->f);
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} else {
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return eoverflow();
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}
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}
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int(vfprintf)(FILE *f, const char *fmt, va_list va) {
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struct state st[1] = {{f, 0}};
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if (palandprintf(vfprintfputchar, st, fmt, va) != -1) {
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return st->toto;
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} else {
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return -1;
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}
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}
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