Root/tools/include/getline.h

1/*-
2 * Copyright (c) 2006 SPARTA, Inc.
3 * All rights reserved.
4 *
5 * This software was developed by SPARTA ISSO under SPAWAR contract
6 * N66001-04-C-6019 ("SEFOS").
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/types.h>
31#include <stdio.h>
32#include <stdlib.h>
33#include <string.h>
34
35#if !defined(__linux__) && !(defined(__APPLE__) && __DARWIN_C_LEVEL >= 200809L)
36/*
37 * Emulate glibc getline() via BSD fgetln().
38 * Note that outsize is not changed unless memory is allocated.
39 */
40static inline ssize_t
41getline(char **outbuf, size_t *outsize, FILE *fp)
42{
43    size_t len;
44
45#ifndef __CYGWIN__
46    char *buf;
47    buf = fgetln(fp, &len);
48#else
49    char buf[512];
50    fgets(buf, sizeof(buf), fp);
51    len = strlen(buf);
52#endif
53    if (buf == NULL)
54        return (-1);
55
56    /* Assumes realloc() accepts NULL for ptr (C99) */
57    if (*outbuf == NULL || *outsize < len + 1) {
58        void *tmp = realloc(*outbuf, len + 1);
59        if (tmp == NULL)
60            return (-1);
61        *outbuf = tmp;
62        *outsize = len + 1;
63    }
64    memcpy(*outbuf, buf, len);
65    (*outbuf)[len] = '\0';
66    return (len);
67}
68#endif
69

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