/* $NetBSD: fgetln.c,v 1.1.1.1 2020/06/15 01:52:54 christos Exp $ */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Christos Zoulas. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #if !HAVE_FGETLN #include #ifndef HAVE_NBTOOL_CONFIG_H /* These headers are required, but included from nbtool_config.h */ #include #include #include #include #endif char * fgetln(FILE *fp, size_t *len) { static char *buf = NULL; static size_t bufsiz = 0; char *ptr; if (buf == NULL) { bufsiz = BUFSIZ; if ((buf = malloc(bufsiz)) == NULL) return NULL; } if (fgets(buf, bufsiz, fp) == NULL) return NULL; *len = 0; while ((ptr = strchr(&buf[*len], '\n')) == NULL) { size_t nbufsiz = bufsiz + BUFSIZ; char *nbuf = realloc(buf, nbufsiz); if (nbuf == NULL) { int oerrno = errno; free(buf); errno = oerrno; buf = NULL; return NULL; } else buf = nbuf; if (fgets(&buf[bufsiz], BUFSIZ, fp) == NULL) { buf[bufsiz] = '\0'; *len = strlen(buf); return buf; } *len = bufsiz; bufsiz = nbufsiz; } *len = (ptr - buf) + 1; return buf; } #endif #ifdef TEST int main(int argc, char *argv[]) { char *p; size_t len; while ((p = fgetln(stdin, &len)) != NULL) { (void)printf("%zu %s", len, p); free(p); } return 0; } #endif