/* $NetBSD: getline.c,v 1.1.1.6 2015/01/02 20:34:27 christos Exp $ */ /* NetBSD: getline.c,v 1.2 2014/09/16 17:23:50 christos Exp */ /*- * Copyright (c) 2011 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. */ /* NETBSD ORIGINAL: external/bsd/file/dist/src/getline.c */ #include "includes.h" #if 0 #include "file.h" #endif #if !HAVE_GETLINE #include #include #include #include #include static ssize_t getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp) { char *ptr, *eptr; if (*buf == NULL || *bufsiz == 0) { if ((*buf = malloc(BUFSIZ)) == NULL) return -1; *bufsiz = BUFSIZ; } for (ptr = *buf, eptr = *buf + *bufsiz;;) { int c = fgetc(fp); if (c == -1) { if (feof(fp)) { ssize_t diff = (ssize_t)(ptr - *buf); if (diff != 0) { *ptr = '\0'; return diff; } } return -1; } *ptr++ = c; if (c == delimiter) { *ptr = '\0'; return ptr - *buf; } if (ptr + 2 >= eptr) { char *nbuf; size_t nbufsiz = *bufsiz * 2; ssize_t d = ptr - *buf; if ((nbuf = realloc(*buf, nbufsiz)) == NULL) return -1; *buf = nbuf; *bufsiz = nbufsiz; eptr = nbuf + nbufsiz; ptr = nbuf + d; } } } ssize_t getline(char **buf, size_t *bufsiz, FILE *fp) { return getdelim(buf, bufsiz, '\n', fp); } #endif #ifdef TEST int main(int argc, char *argv[]) { char *p = NULL; ssize_t len; size_t n = 0; while ((len = getline(&p, &n, stdin)) != -1) (void)printf("%" SIZE_T_FORMAT "d %s", len, p); free(p); return 0; } #endif