1*ba9bdd8bSchristos /* $NetBSD: bsd-getline.c,v 1.1.1.1 2020/03/03 00:11:47 christos Exp $ */
2*ba9bdd8bSchristos
3*ba9bdd8bSchristos /* NetBSD: getline.c,v 1.2 2014/09/16 17:23:50 christos Exp */
4*ba9bdd8bSchristos
5*ba9bdd8bSchristos /*-
6*ba9bdd8bSchristos * Copyright (c) 2011 The NetBSD Foundation, Inc.
7*ba9bdd8bSchristos * All rights reserved.
8*ba9bdd8bSchristos *
9*ba9bdd8bSchristos * This code is derived from software contributed to The NetBSD Foundation
10*ba9bdd8bSchristos * by Christos Zoulas.
11*ba9bdd8bSchristos *
12*ba9bdd8bSchristos * Redistribution and use in source and binary forms, with or without
13*ba9bdd8bSchristos * modification, are permitted provided that the following conditions
14*ba9bdd8bSchristos * are met:
15*ba9bdd8bSchristos * 1. Redistributions of source code must retain the above copyright
16*ba9bdd8bSchristos * notice, this list of conditions and the following disclaimer.
17*ba9bdd8bSchristos * 2. Redistributions in binary form must reproduce the above copyright
18*ba9bdd8bSchristos * notice, this list of conditions and the following disclaimer in the
19*ba9bdd8bSchristos * documentation and/or other materials provided with the distribution.
20*ba9bdd8bSchristos *
21*ba9bdd8bSchristos * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22*ba9bdd8bSchristos * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23*ba9bdd8bSchristos * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24*ba9bdd8bSchristos * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25*ba9bdd8bSchristos * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26*ba9bdd8bSchristos * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27*ba9bdd8bSchristos * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28*ba9bdd8bSchristos * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29*ba9bdd8bSchristos * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30*ba9bdd8bSchristos * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31*ba9bdd8bSchristos * POSSIBILITY OF SUCH DAMAGE.
32*ba9bdd8bSchristos */
33*ba9bdd8bSchristos
34*ba9bdd8bSchristos /* NETBSD ORIGINAL: external/bsd/file/dist/src/getline.c */
35*ba9bdd8bSchristos
36*ba9bdd8bSchristos #include "openbsd-compat.h"
37*ba9bdd8bSchristos
38*ba9bdd8bSchristos #if 0
39*ba9bdd8bSchristos #include "file.h"
40*ba9bdd8bSchristos #endif
41*ba9bdd8bSchristos
42*ba9bdd8bSchristos #if !HAVE_GETLINE
43*ba9bdd8bSchristos #include <stdlib.h>
44*ba9bdd8bSchristos #include <stdio.h>
45*ba9bdd8bSchristos #ifdef HAVE_UNISTD_H
46*ba9bdd8bSchristos #include <unistd.h>
47*ba9bdd8bSchristos #endif
48*ba9bdd8bSchristos #include <errno.h>
49*ba9bdd8bSchristos #include <string.h>
50*ba9bdd8bSchristos
51*ba9bdd8bSchristos static ssize_t
getdelim(char ** buf,size_t * bufsiz,int delimiter,FILE * fp)52*ba9bdd8bSchristos getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp)
53*ba9bdd8bSchristos {
54*ba9bdd8bSchristos char *ptr, *eptr;
55*ba9bdd8bSchristos
56*ba9bdd8bSchristos
57*ba9bdd8bSchristos if (*buf == NULL || *bufsiz == 0) {
58*ba9bdd8bSchristos if ((*buf = malloc(BUFSIZ)) == NULL)
59*ba9bdd8bSchristos return -1;
60*ba9bdd8bSchristos *bufsiz = BUFSIZ;
61*ba9bdd8bSchristos }
62*ba9bdd8bSchristos
63*ba9bdd8bSchristos for (ptr = *buf, eptr = *buf + *bufsiz;;) {
64*ba9bdd8bSchristos int c = fgetc(fp);
65*ba9bdd8bSchristos if (c == -1) {
66*ba9bdd8bSchristos if (feof(fp)) {
67*ba9bdd8bSchristos ssize_t diff = (ssize_t)(ptr - *buf);
68*ba9bdd8bSchristos if (diff != 0) {
69*ba9bdd8bSchristos *ptr = '\0';
70*ba9bdd8bSchristos return diff;
71*ba9bdd8bSchristos }
72*ba9bdd8bSchristos }
73*ba9bdd8bSchristos return -1;
74*ba9bdd8bSchristos }
75*ba9bdd8bSchristos *ptr++ = (char)c;
76*ba9bdd8bSchristos if (c == delimiter) {
77*ba9bdd8bSchristos *ptr = '\0';
78*ba9bdd8bSchristos return ptr - *buf;
79*ba9bdd8bSchristos }
80*ba9bdd8bSchristos if (ptr + 2 >= eptr) {
81*ba9bdd8bSchristos char *nbuf;
82*ba9bdd8bSchristos size_t nbufsiz = *bufsiz * 2;
83*ba9bdd8bSchristos ssize_t d = ptr - *buf;
84*ba9bdd8bSchristos if ((nbuf = realloc(*buf, nbufsiz)) == NULL)
85*ba9bdd8bSchristos return -1;
86*ba9bdd8bSchristos *buf = nbuf;
87*ba9bdd8bSchristos *bufsiz = nbufsiz;
88*ba9bdd8bSchristos eptr = nbuf + nbufsiz;
89*ba9bdd8bSchristos ptr = nbuf + d;
90*ba9bdd8bSchristos }
91*ba9bdd8bSchristos }
92*ba9bdd8bSchristos }
93*ba9bdd8bSchristos
94*ba9bdd8bSchristos ssize_t
getline(char ** buf,size_t * bufsiz,FILE * fp)95*ba9bdd8bSchristos getline(char **buf, size_t *bufsiz, FILE *fp)
96*ba9bdd8bSchristos {
97*ba9bdd8bSchristos return getdelim(buf, bufsiz, '\n', fp);
98*ba9bdd8bSchristos }
99*ba9bdd8bSchristos
100*ba9bdd8bSchristos #endif
101*ba9bdd8bSchristos
102*ba9bdd8bSchristos #ifdef TEST
103*ba9bdd8bSchristos int
main(int argc,char * argv[])104*ba9bdd8bSchristos main(int argc, char *argv[])
105*ba9bdd8bSchristos {
106*ba9bdd8bSchristos char *p = NULL;
107*ba9bdd8bSchristos ssize_t len;
108*ba9bdd8bSchristos size_t n = 0;
109*ba9bdd8bSchristos
110*ba9bdd8bSchristos while ((len = getline(&p, &n, stdin)) != -1)
111*ba9bdd8bSchristos (void)printf("%" SIZE_T_FORMAT "d %s", len, p);
112*ba9bdd8bSchristos free(p);
113*ba9bdd8bSchristos return 0;
114*ba9bdd8bSchristos }
115*ba9bdd8bSchristos #endif
116