1 /* $NetBSD: getline.c,v 1.1.1.3 2013/03/23 15:49:15 christos Exp $ */ 2 3 /* NetBSD: fgetln.c,v 1.9 2008/04/29 06:53:03 martin 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 #include "file.h" 35 #if !HAVE_GETLINE 36 #include <stdlib.h> 37 #include <stdio.h> 38 #include <unistd.h> 39 #include <errno.h> 40 #include <string.h> 41 42 public ssize_t 43 getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp) 44 { 45 char *ptr, *eptr; 46 47 48 if (*buf == NULL || *bufsiz == 0) { 49 *bufsiz = BUFSIZ; 50 if ((*buf = malloc(*bufsiz)) == NULL) 51 return -1; 52 } 53 54 for (ptr = *buf, eptr = *buf + *bufsiz;;) { 55 int c = fgetc(fp); 56 if (c == -1) { 57 if (feof(fp)) 58 return ptr == *buf ? -1 : ptr - *buf; 59 else 60 return -1; 61 } 62 *ptr++ = c; 63 if (c == delimiter) { 64 *ptr = '\0'; 65 return ptr - *buf; 66 } 67 if (ptr + 2 >= eptr) { 68 char *nbuf; 69 size_t nbufsiz = *bufsiz * 2; 70 ssize_t d = ptr - *buf; 71 if ((nbuf = realloc(*buf, nbufsiz)) == NULL) 72 return -1; 73 *buf = nbuf; 74 *bufsiz = nbufsiz; 75 eptr = nbuf + nbufsiz; 76 ptr = nbuf + d; 77 } 78 } 79 } 80 81 ssize_t 82 getline(char **buf, size_t *bufsiz, FILE *fp) 83 { 84 return getdelim(buf, bufsiz, '\n', fp); 85 } 86 87 #endif 88 89 #ifdef TEST 90 int 91 main(int argc, char *argv[]) 92 { 93 char *p = NULL; 94 ssize_t len; 95 size_t n = 0; 96 97 while ((len = getline(&p, &n, stdin)) != -1) 98 (void)printf("%zd %s", len, p); 99 free(p); 100 return 0; 101 } 102 #endif 103