Started working on new pipelines for sending and receiving data.

This will be useful for the next step; SSL.

(NOTE: This code is very chatty about debug messages)

src/hubio.c

@@ -0,0 +1,91 @@
+/*
+ * uhub - A tiny ADC p2p connection hub
+ * Copyright (C) 2007-2009, Jan Vidar Krey
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "uhub.h"
+#include "hubio.h"
+
+
+struct hub_iobuf* hub_iobuf_create(size_t max_size)
+{
+	struct hub_iobuf* buf = hub_malloc_zero(sizeof(struct hub_iobuf));
+	if (buf)
+	{
+		buf->buf = hub_malloc(max_size);
+		buf->capacity = max_size;
+	}
+	return buf;
+}
+
+void hub_iobuf_destroy(struct hub_iobuf* buf)
+{
+	if (buf)
+	{
+		hub_free(buf->buf);
+		hub_free(buf);
+	}
+}
+
+int hub_iobuf_recv(struct hub_iobuf* buf, hub_iobuf_read r, void* data)
+{
+	int size = r(data, &buf->buf[buf->offset], buf->capacity - buf->offset);
+	if (size > 0)
+	{
+		buf->size += size;
+	}
+	return size;
+}
+
+int hub_iobuf_send(struct hub_iobuf* buf, hub_iobuf_write w, void* data)
+{
+	int size = w(data, &buf->buf[buf->offset], buf->size - buf->offset);
+	if (size > 0)
+	{
+		buf->offset += size;
+	}
+	return size;
+}
+
+char* hub_iobuf_getline(struct hub_iobuf* buf, size_t* offset, size_t* len, size_t max_size)
+{
+	size_t x = *offset;
+	char* pos = memchr(&buf->buf[x], '\n', (buf->size - x));
+
+	if (pos)
+	{
+		*len = &pos[0] - &buf->buf[x];
+		pos[0] = '\0';
+		pos = &buf->buf[x];
+		(*offset) += (*len + 1);
+	}
+	return pos;
+}
+
+void hub_iobuf_remove(struct hub_iobuf* buf, size_t n)
+{
+	assert(buf);
+	assert(n <= buf->size);
+
+	buf->offset = 0;
+
+	if (n == buf->size)
+	{
+		buf->size = 0;
+	}
+
+}