2 Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
4 This file is part of GNU Wget.
6 GNU Wget is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 GNU Wget is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with Wget; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 In addition, as a special exception, the Free Software Foundation
21 gives permission to link the code of its release of Wget with the
22 OpenSSL project's "OpenSSL" library (or with modified versions of it
23 that use the same license as the "OpenSSL" library), and distribute
24 the linked executables. You must obey the GNU General Public License
25 in all respects for all of the code used other than "OpenSSL". If you
26 modify this file, you may extend this exception to your version of the
27 file, but you are not obligated to do so. If you do not wish to do
28 so, delete this exception statement from your version. */
30 /* This is a simple implementation of buffering IO-read functions. */
46 #include <openssl/bio.h>
47 #include <openssl/crypto.h>
48 #include <openssl/x509.h>
49 #include <openssl/ssl.h>
50 #include <openssl/err.h>
51 #include <openssl/pem.h>
52 #include "gen_sslfunc.h" /* for ssl_iread */
56 rbuf_initialize (struct rbuf *rbuf, int fd)
60 /* pointing ssl to NULL results in an unchanged behaviour */
63 rbuf->buffer_pos = rbuf->buffer;
64 rbuf->buffer_left = 0;
68 rbuf_initialized_p (struct rbuf *rbuf)
70 return rbuf->fd != -1;
74 rbuf_uninitialize (struct rbuf *rbuf)
80 rbuf_read_bufferful (struct rbuf *rbuf)
84 return ssl_iread (rbuf->ssl, rbuf->buffer, sizeof (rbuf->buffer));
87 return iread (rbuf->fd, rbuf->buffer, sizeof (rbuf->buffer));
90 /* Currently unused -- see RBUF_READCHAR. */
92 /* Function version of RBUF_READCHAR. */
94 rbuf_readchar (struct rbuf *rbuf, char *store)
96 return RBUF_READCHAR (rbuf, store);
100 /* Like rbuf_readchar(), only don't move the buffer position. */
102 rbuf_peek (struct rbuf *rbuf, char *store)
104 if (!rbuf->buffer_left)
107 rbuf->buffer_pos = rbuf->buffer;
108 rbuf->buffer_left = 0;
110 if (rbuf->ssl != NULL) {
111 res = ssl_iread (rbuf->ssl, rbuf->buffer, sizeof (rbuf->buffer));
113 #endif /* HAVE_SSL */
114 res = iread (rbuf->fd, rbuf->buffer, sizeof (rbuf->buffer));
117 #endif /* HAVE_SSL */
120 rbuf->buffer_left = res;
122 *store = *rbuf->buffer_pos;
126 /* Flush RBUF's buffer to WHERE. Flush MAXSIZE bytes at most.
127 Returns the number of bytes actually copied. If the buffer is
128 empty, 0 is returned. */
130 rbuf_flush (struct rbuf *rbuf, char *where, int maxsize)
132 if (!rbuf->buffer_left)
136 int howmuch = MINVAL (rbuf->buffer_left, maxsize);
139 memcpy (where, rbuf->buffer_pos, howmuch);
140 rbuf->buffer_left -= howmuch;
141 rbuf->buffer_pos += howmuch;
146 /* Discard any cached data in RBUF. */
148 rbuf_discard (struct rbuf *rbuf)
150 rbuf->buffer_left = 0;
151 rbuf->buffer_pos = rbuf->buffer;