46 lines
2.5 KiB
C
46 lines
2.5 KiB
C
/*-*- 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/errno.h"
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/internal.h"
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#include "libc/stdio/stdio.h"
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/**
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* Writes data to stream.
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*
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* @param stride specifies the size of individual items
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* @param count is the number of strides to fetch
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* @return count on success, [0,count) on EOF, 0 on error or count==0
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*/
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size_t fwrite(const void *data, size_t stride, size_t count, FILE *f) {
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size_t i, n;
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const unsigned char *p;
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for (n = stride * count, p = data, i = 0; i < n; ++i) {
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if (fputc(p[i], f) == -1) {
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if (!(i % stride)) {
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return i / stride;
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} else {
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return fseterr(f, EOVERFLOW);
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}
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}
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}
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return count;
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}
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