1 /* NetBSD: getline.c,v 1.1.1.6 2015/01/02 20:34:27 christos Exp */ 2 3 /* NetBSD: getline.c,v 1.2 2014/09/16 17:23:50 christos Exp */ 4 5 /*- 6 * Copyright (c) 2011 The NetBSD Foundation, Inc. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to The NetBSD Foundation 10 * by Christos Zoulas. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* NETBSD ORIGINAL: external/bsd/file/dist/src/getline.c */ 35 36 #include <sys/types.h> 37 38 #include <stdlib.h> 39 #include <stdio.h> 40 #include <unistd.h> 41 #include <errno.h> 42 #include <string.h> 43 44 #include "tmux.h" 45 46 static ssize_t 47 getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp) 48 { 49 char *ptr, *eptr; 50 51 52 if (*buf == NULL || *bufsiz == 0) { 53 if ((*buf = malloc(BUFSIZ)) == NULL) 54 return -1; 55 *bufsiz = BUFSIZ; 56 } 57 58 for (ptr = *buf, eptr = *buf + *bufsiz;;) { 59 int c = fgetc(fp); 60 if (c == -1) { 61 if (feof(fp)) { 62 ssize_t diff = (ssize_t)(ptr - *buf); 63 if (diff != 0) { 64 *ptr = '\0'; 65 return diff; 66 } 67 } 68 return -1; 69 } 70 *ptr++ = c; 71 if (c == delimiter) { 72 *ptr = '\0'; 73 return ptr - *buf; 74 } 75 if (ptr + 2 >= eptr) { 76 char *nbuf; 77 size_t nbufsiz = *bufsiz * 2; 78 ssize_t d = ptr - *buf; 79 if ((nbuf = realloc(*buf, nbufsiz)) == NULL) 80 return -1; 81 *buf = nbuf; 82 *bufsiz = nbufsiz; 83 eptr = nbuf + nbufsiz; 84 ptr = nbuf + d; 85 } 86 } 87 } 88 89 ssize_t 90 getline(char **buf, size_t *bufsiz, FILE *fp) 91 { 92 return getdelim(buf, bufsiz, '\n', fp); 93 } 94