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 "includes.h" 37 38 #if 0 39 #include "file.h" 40 #endif 41 42 #if !HAVE_GETLINE 43 #include <stdlib.h> 44 #include <stdio.h> 45 #include <unistd.h> 46 #include <errno.h> 47 #include <string.h> 48 49 static ssize_t 50 getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp) 51 { 52 char *ptr, *eptr; 53 54 55 if (*buf == NULL || *bufsiz == 0) { 56 if ((*buf = malloc(BUFSIZ)) == NULL) 57 return -1; 58 *bufsiz = BUFSIZ; 59 } 60 61 for (ptr = *buf, eptr = *buf + *bufsiz;;) { 62 int c = fgetc(fp); 63 if (c == -1) { 64 if (feof(fp)) { 65 ssize_t diff = (ssize_t)(ptr - *buf); 66 if (diff != 0) { 67 *ptr = '\0'; 68 return diff; 69 } 70 } 71 return -1; 72 } 73 *ptr++ = c; 74 if (c == delimiter) { 75 *ptr = '\0'; 76 return ptr - *buf; 77 } 78 if (ptr + 2 >= eptr) { 79 char *nbuf; 80 size_t nbufsiz = *bufsiz * 2; 81 ssize_t d = ptr - *buf; 82 if ((nbuf = realloc(*buf, nbufsiz)) == NULL) 83 return -1; 84 *buf = nbuf; 85 *bufsiz = nbufsiz; 86 eptr = nbuf + nbufsiz; 87 ptr = nbuf + d; 88 } 89 } 90 } 91 92 ssize_t 93 getline(char **buf, size_t *bufsiz, FILE *fp) 94 { 95 return getdelim(buf, bufsiz, '\n', fp); 96 } 97 98 #endif 99 100 #ifdef TEST 101 int 102 main(int argc, char *argv[]) 103 { 104 char *p = NULL; 105 ssize_t len; 106 size_t n = 0; 107 108 while ((len = getline(&p, &n, stdin)) != -1) 109 (void)printf("%" SIZE_T_FORMAT "d %s", len, p); 110 free(p); 111 return 0; 112 } 113 #endif 114