# Path: btchip/btchipException.py
# class BTChipException(Exception):
# 
# 	def __init__(self, message, sw=0x6f00):
# 		self.message = message
# 		self.sw = sw
# 
# 	def __str__(self):
# 		buf = "Exception : " + self.message
# 		return buf


from .btchipException import BTChipException
*   (c) 2014 BTChip - 1BTChip7VfTnrPra5jqci7ejnMguuHogTn
*
*  Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
*   Unless required by applicable law or agreed to in writing, software
*   distributed under the License is distributed on an "AS IS" BASIS,
*   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*  See the License for the specific language governing permissions and
*   limitations under the License.
********************************************************************************
"""


def readVarint(buffer, offset):
	varintSize = 0
	value = 0
	if (buffer[offset] < 0xfd):
		value = buffer[offset]
		varintSize = 1
	elif (buffer[offset] == 0xfd):
		value = (buffer[offset + 2] << 8) | (buffer[offset + 1])
		varintSize = 3
	elif (buffer[offset] == 0xfe):
		value = (buffer[offset + 4] << 24) | (buffer[offset + 3] << 16) | (buffer[offset + 2] << 8) | (buffer[offset + 1])
		varintSize = 5
	else:

# Path: btchip/btchipException.py
# class BTChipException(Exception):
# 
# 	def __init__(self, message, sw=0x6f00):
# 		self.message = message
# 		self.sw = sw
# 
# 	def __str__(self):
# 		buf = "Exception : " + self.message
# 		return buf


# Path: btchip/bitcoinVarint.py
from .btchipException import BTChipException

*   (c) 2014 BTChip - 1BTChip7VfTnrPra5jqci7ejnMguuHogTn
*
*  Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
*   Unless required by applicable law or agreed to in writing, software
*   distributed under the License is distributed on an "AS IS" BASIS,
*   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*  See the License for the specific language governing permissions and
*   limitations under the License.
********************************************************************************
"""


def readVarint(buffer, offset):
	varintSize = 0
	value = 0
	if (buffer[offset] < 0xfd):
		value = buffer[offset]
		varintSize = 1
	elif (buffer[offset] == 0xfd):
		value = (buffer[offset + 2] << 8) | (buffer[offset + 1])
		varintSize = 3
	elif (buffer[offset] == 0xfe):
		value = (buffer[offset + 4] << 24) | (buffer[offset + 3] << 16) | (buffer[offset + 2] << 8) | (buffer[offset + 1])
		varintSize = 5
	else:

		raise BTChipException("unsupported varint")