1 /* $NetBSD: getline.c,v 1.1.1.4 2014/06/13 01:48:21 christos Exp $ */ 2 /* NetBSD: fgetln.c,v 1.9 2008/04/29 06:53:03 martin 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 #include "file.h" 34 #if !HAVE_GETLINE 35 #include <stdlib.h> 36 #include <stdio.h> 37 #include <unistd.h> 38 #include <errno.h> 39 #include <string.h> 40 41 public ssize_t 42 getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp) 43 { 44 char *ptr, *eptr; 45 46 47 if (*buf == NULL || *bufsiz == 0) { 48 *bufsiz = BUFSIZ; 49 if ((*buf = malloc(*bufsiz)) == NULL) 50 return -1; 51 } 52 53 for (ptr = *buf, eptr = *buf + *bufsiz;;) { 54 int c = fgetc(fp); 55 if (c == -1) { 56 if (feof(fp)) 57 return ptr == *buf ? -1 : ptr - *buf; 58 else 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 ((nbuf = realloc(*buf, nbufsiz)) == NULL) 71 return -1; 72 *buf = nbuf; 73 *bufsiz = nbufsiz; 74 eptr = nbuf + nbufsiz; 75 ptr = nbuf + d; 76 } 77 } 78 } 79 80 ssize_t 81 getline(char **buf, size_t *bufsiz, FILE *fp) 82 { 83 return getdelim(buf, bufsiz, '\n', fp); 84 } 85 86 #endif 87 88 #ifdef TEST 89 int 90 main(int argc, char *argv[]) 91 { 92 char *p = NULL; 93 ssize_t len; 94 size_t n = 0; 95 96 while ((len = getline(&p, &n, stdin)) != -1) 97 (void)printf("%zd %s", len, p); 98 free(p); 99 return 0; 100 } 101 #endif 102