Moved remotely

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@48 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_buffer.c

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+/* 
+ * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
+ * Copyright (C) 2005/2006, Anthony Minessale II <anthmct@yahoo.com>
+ *
+ * Version: MPL 1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
+ *
+ * The Initial Developer of the Original Code is
+ * Anthony Minessale II <anthmct@yahoo.com>
+ * Portions created by the Initial Developer are Copyright (C)
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ * 
+ * Anthony Minessale II <anthmct@yahoo.com>
+ *
+ *
+ * switch_buffer.c -- Data Buffering Code
+ *
+ */
+#include <switch_buffer.h>
+
+struct switch_buffer {
+	unsigned char *data;
+	size_t used;
+	size_t datalen;
+};
+
+SWITCH_DECLARE(switch_status) switch_buffer_create(switch_memory_pool *pool, switch_buffer **buffer, size_t max_len)
+{
+	switch_buffer *new_buffer;
+
+	if ((new_buffer = switch_core_alloc(pool, sizeof(switch_buffer))) && (new_buffer->data = switch_core_alloc(pool, max_len))) {
+		new_buffer->datalen = max_len;
+		*buffer = new_buffer;
+		return SWITCH_STATUS_SUCCESS;
+	}
+	return SWITCH_STATUS_MEMERR;
+}
+
+SWITCH_DECLARE(int) switch_buffer_len(switch_buffer *buffer)
+{
+
+	assert(buffer != NULL);
+
+	return (int)buffer->datalen;
+
+}
+
+
+SWITCH_DECLARE(int) switch_buffer_freespace(switch_buffer *buffer)
+{
+	assert(buffer != NULL);
+
+	return (int)(buffer->datalen - buffer->used);
+}
+
+SWITCH_DECLARE(int) switch_buffer_inuse(switch_buffer *buffer)
+{
+	assert(buffer != NULL);
+
+	return (int)buffer->used;
+}
+
+SWITCH_DECLARE(int) switch_buffer_toss(switch_buffer *buffer, size_t datalen)
+{
+	size_t reading = 0;
+
+	assert(buffer != NULL);
+
+	if (buffer->used < 1) {
+		buffer->used = 0;
+		return 0;
+	} else if (buffer->used >= datalen) {
+		reading = datalen;
+	} else {
+		reading = buffer->used;
+	}
+
+	memmove(buffer->data, buffer->data + reading, buffer->datalen - reading);
+	buffer->used -= datalen;
+
+	return (int)buffer->datalen;
+}
+
+SWITCH_DECLARE(int) switch_buffer_read(switch_buffer *buffer, void *data, size_t datalen)
+{
+	size_t reading = 0;
+
+	assert(buffer != NULL);
+	assert(data != NULL);
+
+
+	if (buffer->used < 1) {
+		return 0;
+	} else if (buffer->used >= datalen) {
+		reading = datalen;
+	} else {
+		reading = buffer->used;
+	}
+
+	memcpy(data, buffer->data, reading);
+	memmove(buffer->data, buffer->data + reading, buffer->datalen - reading);
+	buffer->used -= datalen;
+	//printf("o %d = %d\n", reading, buffer->used);
+	return (int)reading;
+}
+
+SWITCH_DECLARE(int) switch_buffer_write(switch_buffer *buffer, void *data, size_t datalen)
+{
+	size_t freespace;
+
+	assert(buffer != NULL);
+	assert(data != NULL);
+	assert(buffer->data != NULL);
+
+	freespace = buffer->datalen - buffer->used;
+
+	if (freespace < datalen) {
+		return 0;
+	} else {
+		memcpy(buffer->data + buffer->used, data, datalen);
+		buffer->used += datalen;
+	}
+	//printf("i %d = %d\n", datalen, buffer->used);
+	return (int)buffer->used;
+}
+