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