1 /* -*- buffer-read-only: t -*- vi: set ro: */
2 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
3 /* getdelim.c --- Implementation of replacement getdelim function.
4 Copyright (C) 1994, 1996, 1997, 1998, 2001, 2003, 2005, 2006, 2007,
5 2008, 2009 Free Software Foundation, Inc.
6
7 This program is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public License as
9 published by the Free Software Foundation; either version 3, or (at
10 your option) any later version.
11
12 This program is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22 /* Ported from glibc by Simon Josefsson. */
23
24 #include <config.h>
25
26 #include <stdio.h>
27
28 #include <limits.h>
29 #include <stdint.h>
30 #include <stdlib.h>
31 #include <errno.h>
32
33 #ifndef SSIZE_MAX
34 # define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2))
35 #endif
36
37 #if USE_UNLOCKED_IO
38 # include "unlocked-io.h"
39 # define getc_maybe_unlocked(fp) getc(fp)
40 #elif !HAVE_FLOCKFILE || !HAVE_FUNLOCKFILE || !HAVE_DECL_GETC_UNLOCKED
41 # undef flockfile
42 # undef funlockfile
43 # define flockfile(x) ((void) 0)
44 # define funlockfile(x) ((void) 0)
45 # define getc_maybe_unlocked(fp) getc(fp)
46 #else
47 # define getc_maybe_unlocked(fp) getc_unlocked(fp)
48 #endif
49
50 /* Read up to (and including) a DELIMITER from FP into *LINEPTR (and
51 NUL-terminate it). *LINEPTR is a pointer returned from malloc (or
52 NULL), pointing to *N characters of space. It is realloc'ed as
53 necessary. Returns the number of characters read (not including
54 the null terminator), or -1 on error or EOF. */
55
56 ssize_t
getdelim(char ** lineptr,size_t * n,int delimiter,FILE * fp)57 getdelim (char **lineptr, size_t *n, int delimiter, FILE *fp)
58 {
59 ssize_t result;
60 size_t cur_len = 0;
61
62 if (lineptr == NULL || n == NULL || fp == NULL)
63 {
64 errno = EINVAL;
65 return -1;
66 }
67
68 flockfile (fp);
69
70 if (*lineptr == NULL || *n == 0)
71 {
72 char *new_lineptr;
73 *n = 120;
74 new_lineptr = (char *) realloc (*lineptr, *n);
75 if (new_lineptr == NULL)
76 {
77 result = -1;
78 goto unlock_return;
79 }
80 *lineptr = new_lineptr;
81 }
82
83 for (;;)
84 {
85 int i;
86
87 i = getc_maybe_unlocked (fp);
88 if (i == EOF)
89 {
90 result = -1;
91 break;
92 }
93
94 /* Make enough space for len+1 (for final NUL) bytes. */
95 if (cur_len + 1 >= *n)
96 {
97 size_t needed_max =
98 SSIZE_MAX < SIZE_MAX ? (size_t) SSIZE_MAX + 1 : SIZE_MAX;
99 size_t needed = 2 * *n + 1; /* Be generous. */
100 char *new_lineptr;
101
102 if (needed_max < needed)
103 needed = needed_max;
104 if (cur_len + 1 >= needed)
105 {
106 result = -1;
107 errno = EOVERFLOW;
108 goto unlock_return;
109 }
110
111 new_lineptr = (char *) realloc (*lineptr, needed);
112 if (new_lineptr == NULL)
113 {
114 result = -1;
115 goto unlock_return;
116 }
117
118 *lineptr = new_lineptr;
119 *n = needed;
120 }
121
122 (*lineptr)[cur_len] = i;
123 cur_len++;
124
125 if (i == delimiter)
126 break;
127 }
128 (*lineptr)[cur_len] = '\0';
129 result = cur_len ? cur_len : result;
130
131 unlock_return:
132 funlockfile (fp); /* doesn't set errno */
133
134 return result;
135 }
136