7ec1ec4fdb
In most cases this simply builds the file from lib/libc for missing functions (e.g. strlcpy on Linux etc.). In cases where this is not possible I've added an implementation to tools/build/cross-build. The fgetln.c/fgetwln.c/closefrom.c compatibility code was obtained from https://gitlab.freedesktop.org/libbsd/libbsd, but I'm not sure it makes sense to import it into to contrib just for these three bootstrap files. Reviewed By: brooks Differential Revision: https://reviews.freebsd.org/D25978
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/*
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* Copyright 2012 Guillem Jover <guillem@hadrons.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <wchar.h>
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#include "local-link.h"
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struct filewbuf {
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FILE *fp;
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wchar_t *wbuf;
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size_t len;
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};
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#define FILEWBUF_INIT_LEN 128
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#define FILEWBUF_POOL_ITEMS 32
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static struct filewbuf fb_pool[FILEWBUF_POOL_ITEMS];
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static int fb_pool_cur;
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wchar_t *
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fgetwln(FILE *stream, size_t *lenp)
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{
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struct filewbuf *fb;
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wint_t wc;
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size_t wused = 0;
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/* Try to diminish the possibility of several fgetwln() calls being
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* used on different streams, by using a pool of buffers per file. */
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fb = &fb_pool[fb_pool_cur];
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if (fb->fp != stream && fb->fp != NULL) {
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fb_pool_cur++;
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fb_pool_cur %= FILEWBUF_POOL_ITEMS;
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fb = &fb_pool[fb_pool_cur];
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}
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fb->fp = stream;
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while ((wc = fgetwc(stream)) != WEOF) {
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if (!fb->len || wused >= fb->len) {
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wchar_t *wp;
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if (fb->len)
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fb->len *= 2;
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else
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fb->len = FILEWBUF_INIT_LEN;
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wp = reallocarray(fb->wbuf, fb->len, sizeof(wchar_t));
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if (wp == NULL) {
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wused = 0;
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break;
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}
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fb->wbuf = wp;
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}
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fb->wbuf[wused++] = wc;
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if (wc == L'\n')
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break;
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}
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*lenp = wused;
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return wused ? fb->wbuf : NULL;
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}
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libbsd_link_warning(fgetwln,
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"This function cannot be safely ported, use fgetwc(3) "
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"instead, as it is supported by C99 and POSIX.1-2001.")
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