getdelim.c (2484B)
1 /* $NetBSD: getdelim.c,v 1.2 2015/12/25 20:12:46 joerg Exp $ */ 2 /* NetBSD-src: getline.c,v 1.2 2014/09/16 17:23:50 christos Exp */ 3 4 /*- 5 * Copyright (c) 2011 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Christos Zoulas. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef BUFSIZ 34 #define BUFSIZ 512 35 #endif 36 37 ssize_t 38 compat_getdelim_(char **buf, size_t *bufsiz, int delimiter, FILE *fp) 39 { 40 char *ptr, *eptr; 41 42 43 if (*buf == NULL || *bufsiz == 0) { 44 *bufsiz = BUFSIZ; 45 if ((*buf = raw_malloc(*bufsiz)) == NULL) 46 return -1; 47 } 48 49 for (ptr = *buf, eptr = *buf + *bufsiz;;) { 50 int c = fgetc(fp); 51 if (c == -1) { 52 if (feof(fp)) { 53 ssize_t diff = (ssize_t)(ptr - *buf); 54 if (diff != 0) { 55 *ptr = '\0'; 56 return diff; 57 } 58 } 59 return -1; 60 } 61 *ptr++ = c; 62 if (c == delimiter) { 63 *ptr = '\0'; 64 return ptr - *buf; 65 } 66 if (ptr + 2 >= eptr) { 67 char *nbuf; 68 size_t nbufsiz = *bufsiz * 2; 69 ssize_t d = ptr - *buf; 70 if (nbufsiz < *bufsiz || 71 (nbuf = raw_realloc(*buf, nbufsiz)) == NULL) 72 return -1; 73 *buf = nbuf; 74 *bufsiz = nbufsiz; 75 eptr = nbuf + nbufsiz; 76 ptr = nbuf + d; 77 } 78 } 79 }