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/* getdelim.c --- Implementation of replacement getdelim function.
* Copyright (C) 1994, 1996-1998, 2001, 2003, 2005-2012 Free Software
* Foundation, Inc.
*
* This file is part of GnuTLS.
*
* The gnutls library is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
/* Ported from glibc by Simon Josefsson. */
#include <gnutls_int.h>
#include <gnutls_errors.h>
#include <gnutls/xssl.h>
#include <xssl.h>
#ifndef SSIZE_MAX
#define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2))
#endif
/**
* xssl_get_delim:
* @sb: is a #xssl_t structure.
* @lineptr: a pointer.
* @n: The size of @lineptr.
* @delimiter: The delimiter to stop reading at.
*
* Read up to (and including) a @delimiter from &sb into *LINEPTR (and
* NUL-terminate it). @lineptr is a pointer returned from gnutls_malloc()
* (or %NULL), pointing to @n characters of space. It is realloc'ed as
* necessary.
*
* Only fatal errors are returned by this function.
*
* Returns the number of characters read (not including
* the null terminator), or a negative error code on error.
*
* Since: 3.1.7
**/
ssize_t
xssl_getdelim(xssl_t sbuf, char **lineptr, size_t * n, int delimiter)
{
ssize_t result;
size_t cur_len = 0;
if (lineptr == NULL || n == NULL || sbuf == NULL) {
return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
}
if (*lineptr == NULL || *n == 0) {
char *new_lineptr;
*n = 120;
new_lineptr = (char *) gnutls_realloc_fast(*lineptr, *n);
if (new_lineptr == NULL) {
result = gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
goto fail;
}
*lineptr = new_lineptr;
}
for (;;) {
char c;
result = xssl_read(sbuf, &c, 1);
if (result < 0) {
gnutls_assert();
break;
}
/* Make enough space for len+1 (for final NUL) bytes. */
if (cur_len + 1 >= *n) {
size_t needed_max =
SSIZE_MAX <
SIZE_MAX ? (size_t) SSIZE_MAX + 1 : SIZE_MAX;
size_t needed = 2 * *n + 1; /* Be generous. */
char *new_lineptr;
if (needed_max < needed)
needed = needed_max;
if (cur_len + 1 >= needed) {
result =
gnutls_assert_val
(GNUTLS_E_LARGE_PACKET);
goto fail;
}
new_lineptr =
(char *) gnutls_realloc_fast(*lineptr, needed);
if (new_lineptr == NULL) {
result =
gnutls_assert_val
(GNUTLS_E_MEMORY_ERROR);
goto fail;
}
*lineptr = new_lineptr;
*n = needed;
}
(*lineptr)[cur_len] = c;
cur_len++;
if (c == delimiter)
break;
}
(*lineptr)[cur_len] = '\0';
if (cur_len != 0)
result = cur_len;
fail:
return result;
}
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