1 /* getdelim.c --- Implementation of replacement getdelim function.
2 Copyright (C) 1994, 1996, 1997, 1998, 2001, 2003, 2005 Free
3 Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License as
7 published by the Free Software Foundation; either version 2, or (at
8 your option) any later version.
10 This program is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 /* Ported from glibc by Simon Josefsson. */
33 # define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2))
37 # define flockfile(x) ((void) 0)
41 # define funlockfile(x) ((void) 0)
44 /* Read up to (and including) a DELIMITER from FP into *LINEPTR (and
45 NUL-terminate it). *LINEPTR is a pointer returned from malloc (or
46 NULL), pointing to *N characters of space. It is realloc'ed as
47 necessary. Returns the number of characters read (not including
48 the null terminator), or -1 on error or EOF. */
51 getdelim (char **lineptr, size_t *n, int delimiter, FILE *fp)
56 if (lineptr == NULL || n == NULL || fp == NULL)
64 if (*lineptr == NULL || *n == 0)
67 *lineptr = (char *) malloc (*n);
86 /* Make enough space for len+1 (for final NUL) bytes. */
87 if (cur_len + 1 >= *n)
90 SSIZE_MAX < SIZE_MAX ? (size_t) SSIZE_MAX + 1 : SIZE_MAX;
91 size_t needed = 2 * *n + 1; /* Be generous. */
94 if (needed_max < needed)
96 if (cur_len + 1 >= needed)
102 new_lineptr = (char *) realloc (*lineptr, needed);
103 if (new_lineptr == NULL)
109 *lineptr = new_lineptr;
113 (*lineptr)[cur_len] = i;
119 (*lineptr)[cur_len] = '\0';
120 result = cur_len ? cur_len : result;