--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/core/protocols/oscar/bstream.c Sat Dec 16 04:59:55 2006 +0000
@@ -0,0 +1,291 @@
+/*
+ * Gaim's oscar protocol plugin
+ * This file is the legal property of its developers.
+ * Please see the AUTHORS file distributed alongside this file.
+ *
+ * This 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 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 library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+/*
+ * This file contains all functions needed to use bstreams.
+ */
+
+#include "oscar.h"
+
+int byte_stream_init(ByteStream *bs, guint8 *data, int len)
+{
+
+ if (!bs)
+ return -1;
+
+ bs->data = data;
+ bs->len = len;
+ bs->offset = 0;
+
+ return 0;
+}
+
+int byte_stream_empty(ByteStream *bs)
+{
+ return bs->len - bs->offset;
+}
+
+int byte_stream_curpos(ByteStream *bs)
+{
+ return bs->offset;
+}
+
+int byte_stream_setpos(ByteStream *bs, unsigned int off)
+{
+
+ if (off > bs->len)
+ return -1;
+
+ bs->offset = off;
+
+ return off;
+}
+
+void byte_stream_rewind(ByteStream *bs)
+{
+
+ byte_stream_setpos(bs, 0);
+
+ return;
+}
+
+/*
+ * N can be negative, which can be used for going backwards
+ * in a bstream. I'm not sure if libfaim actually does
+ * this anywhere...
+ */
+int byte_stream_advance(ByteStream *bs, int n)
+{
+
+ if ((byte_stream_curpos(bs) + n < 0) || (byte_stream_empty(bs) < n))
+ return 0; /* XXX throw an exception */
+
+ bs->offset += n;
+
+ return n;
+}
+
+guint8 byte_stream_get8(ByteStream *bs)
+{
+
+ if (byte_stream_empty(bs) < 1)
+ return 0; /* XXX throw an exception */
+
+ bs->offset++;
+
+ return aimutil_get8(bs->data + bs->offset - 1);
+}
+
+guint16 byte_stream_get16(ByteStream *bs)
+{
+
+ if (byte_stream_empty(bs) < 2)
+ return 0; /* XXX throw an exception */
+
+ bs->offset += 2;
+
+ return aimutil_get16(bs->data + bs->offset - 2);
+}
+
+guint32 byte_stream_get32(ByteStream *bs)
+{
+
+ if (byte_stream_empty(bs) < 4)
+ return 0; /* XXX throw an exception */
+
+ bs->offset += 4;
+
+ return aimutil_get32(bs->data + bs->offset - 4);
+}
+
+guint8 byte_stream_getle8(ByteStream *bs)
+{
+
+ if (byte_stream_empty(bs) < 1)
+ return 0; /* XXX throw an exception */
+
+ bs->offset++;
+
+ return aimutil_getle8(bs->data + bs->offset - 1);
+}
+
+guint16 byte_stream_getle16(ByteStream *bs)
+{
+
+ if (byte_stream_empty(bs) < 2)
+ return 0; /* XXX throw an exception */
+
+ bs->offset += 2;
+
+ return aimutil_getle16(bs->data + bs->offset - 2);
+}
+
+guint32 byte_stream_getle32(ByteStream *bs)
+{
+
+ if (byte_stream_empty(bs) < 4)
+ return 0; /* XXX throw an exception */
+
+ bs->offset += 4;
+
+ return aimutil_getle32(bs->data + bs->offset - 4);
+}
+
+int byte_stream_getrawbuf(ByteStream *bs, guint8 *buf, int len)
+{
+
+ if (byte_stream_empty(bs) < len)
+ return 0;
+
+ memcpy(buf, bs->data + bs->offset, len);
+ bs->offset += len;
+
+ return len;
+}
+
+guint8 *byte_stream_getraw(ByteStream *bs, int len)
+{
+ guint8 *ob;
+
+ ob = malloc(len);
+
+ if (byte_stream_getrawbuf(bs, ob, len) < len) {
+ free(ob);
+ return NULL;
+ }
+
+ return ob;
+}
+
+char *byte_stream_getstr(ByteStream *bs, int len)
+{
+ char *ob;
+
+ ob = malloc(len + 1);
+
+ if (byte_stream_getrawbuf(bs, (guint8 *)ob, len) < len) {
+ free(ob);
+ return NULL;
+ }
+
+ ob[len] = '\0';
+
+ return ob;
+}
+
+int byte_stream_put8(ByteStream *bs, guint8 v)
+{
+
+ if (byte_stream_empty(bs) < 1)
+ return 0; /* XXX throw an exception */
+
+ bs->offset += aimutil_put8(bs->data + bs->offset, v);
+
+ return 1;
+}
+
+int byte_stream_put16(ByteStream *bs, guint16 v)
+{
+
+ if (byte_stream_empty(bs) < 2)
+ return 0; /* XXX throw an exception */
+
+ bs->offset += aimutil_put16(bs->data + bs->offset, v);
+
+ return 2;
+}
+
+int byte_stream_put32(ByteStream *bs, guint32 v)
+{
+
+ if (byte_stream_empty(bs) < 4)
+ return 0; /* XXX throw an exception */
+
+ bs->offset += aimutil_put32(bs->data + bs->offset, v);
+
+ return 1;
+}
+
+int byte_stream_putle8(ByteStream *bs, guint8 v)
+{
+
+ if (byte_stream_empty(bs) < 1)
+ return 0; /* XXX throw an exception */
+
+ bs->offset += aimutil_putle8(bs->data + bs->offset, v);
+
+ return 1;
+}
+
+int byte_stream_putle16(ByteStream *bs, guint16 v)
+{
+
+ if (byte_stream_empty(bs) < 2)
+ return 0; /* XXX throw an exception */
+
+ bs->offset += aimutil_putle16(bs->data + bs->offset, v);
+
+ return 2;
+}
+
+int byte_stream_putle32(ByteStream *bs, guint32 v)
+{
+
+ if (byte_stream_empty(bs) < 4)
+ return 0; /* XXX throw an exception */
+
+ bs->offset += aimutil_putle32(bs->data + bs->offset, v);
+
+ return 1;
+}
+
+
+int byte_stream_putraw(ByteStream *bs, const guint8 *v, int len)
+{
+
+ if (byte_stream_empty(bs) < len)
+ return 0; /* XXX throw an exception */
+
+ memcpy(bs->data + bs->offset, v, len);
+ bs->offset += len;
+
+ return len;
+}
+
+int byte_stream_putstr(ByteStream *bs, const char *str)
+{
+ return byte_stream_putraw(bs, (guint8 *)str, strlen(str));
+}
+
+int byte_stream_putbs(ByteStream *bs, ByteStream *srcbs, int len)
+{
+
+ if (byte_stream_empty(srcbs) < len)
+ return 0; /* XXX throw exception (underrun) */
+
+ if (byte_stream_empty(bs) < len)
+ return 0; /* XXX throw exception (overflow) */
+
+ memcpy(bs->data + bs->offset, srcbs->data + srcbs->offset, len);
+ bs->offset += len;
+ srcbs->offset += len;
+
+ return len;
+}