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 #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 ssize_t diff = (ssize_t)(ptr - *buf); 59 if (diff != 0) { 60 *ptr = '\0'; 61 return diff; 62 } 63 } 64 return -1; 65 } 66 *ptr++ = c; 67 if (c == delimiter) { 68 *ptr = '\0'; 69 return ptr - *buf; 70 } 71 if (ptr + 2 >= eptr) { 72 char *nbuf; 73 size_t nbufsiz = *bufsiz * 2; 74 ssize_t d = ptr - *buf; 75 if ((nbuf = realloc(*buf, nbufsiz)) == NULL) 76 return -1; 77 *buf = nbuf; 78 *bufsiz = nbufsiz; 79 eptr = nbuf + nbufsiz; 80 ptr = nbuf + d; 81 } 82 } 83 } 84 85 public ssize_t 86 getline(char **buf, size_t *bufsiz, FILE *fp) 87 { 88 return getdelim(buf, bufsiz, '\n', fp); 89 } 90 91 #endif 92 93 #ifdef TEST 94 int 95 main(int argc, char *argv[]) 96 { 97 char *p = NULL; 98 ssize_t len; 99 size_t n = 0; 100 101 while ((len = getline(&p, &n, stdin)) != -1) 102 (void)printf("%" SIZE_T_FORMAT "d %s", len, p); 103 free(p); 104 return 0; 105 } 106 #endif 107