author | Edouard Tisserant <edouard.tisserant@gmail.com> |
Fri, 10 Sep 2021 14:42:46 +0200 | |
branch | wxPython4 |
changeset 3311 | d73af2eeea05 |
parent 2741 | 3cc5663af196 |
child 3395 | 93ad018fb602 |
permissions | -rw-r--r-- |
592 | 1 |
#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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# |
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runtime is licensed under LGPLv2.1
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# See COPYING.Runtime file for copyrights details. |
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# |
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from __future__ import absolute_import |
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import ctypes |
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from ctypes import * |
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from datetime import timedelta as td |
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ctypes.pythonapi.PyString_AsString.argtypes = (ctypes.c_void_p,) |
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ctypes.pythonapi.PyString_AsString.restype = ctypes.POINTER(ctypes.c_char) |
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class IEC_STRING(Structure): |
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""" |
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Must be changed according to changes in iec_types.h |
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""" |
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_fields_ = [("len", c_uint8), |
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("body", c_char * 126)] |
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class IEC_TIME(Structure): |
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""" |
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Must be changed according to changes in iec_types.h |
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""" |
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_fields_ = [("s", c_long), # tv_sec |
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("ns", c_long)] # tv_nsec |
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def _t(t, u=lambda x: x.value, p=lambda t, x: t(x)): |
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return (t, u, p) |
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def _ttime(): |
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return (IEC_TIME, |
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lambda x: td(0, x.s, x.ns/1000.0), |
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lambda t, x: t(x.days * 24 * 3600 + x.seconds, x.microseconds*1000)) |
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SameEndianessTypeTranslator = { |
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"BOOL": _t(c_uint8, lambda x: x.value != 0), |
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"STEP": _t(c_uint8), |
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"TRANSITION": _t(c_uint8), |
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"ACTION": _t(c_uint8), |
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"SINT": _t(c_int8), |
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"USINT": _t(c_uint8), |
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"BYTE": _t(c_uint8), |
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"STRING": (IEC_STRING, |
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lambda x: x.body[:x.len], |
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lambda t, x: t(len(x), x)), |
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"INT": _t(c_int16), |
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"UINT": _t(c_uint16), |
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"WORD": _t(c_uint16), |
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"DINT": _t(c_int32), |
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"UDINT": _t(c_uint32), |
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"DWORD": _t(c_uint32), |
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"LINT": _t(c_int64), |
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"ULINT": _t(c_uint64), |
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"LWORD": _t(c_uint64), |
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"REAL": _t(c_float), |
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"LREAL": _t(c_double), |
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"TIME": _ttime(), |
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"TOD": _ttime(), |
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"DATE": _ttime(), |
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"DT": _ttime(), |
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} |
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SwapedEndianessTypeTranslator = { |
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# TODO |
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} |
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TypeTranslator = SameEndianessTypeTranslator |
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# Construct debugger natively supported types |
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DebugTypesSize = dict([(key, sizeof(t)) for key, (t, p, u) in SameEndianessTypeTranslator.iteritems() if t is not None]) |
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def UnpackDebugBuffer(buff, indexes): |
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res = [] |
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buffoffset = 0 |
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buffsize = len(buff) |
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buffptr = cast(ctypes.pythonapi.PyString_AsString(id(buff)), c_void_p).value |
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for iectype in indexes: |
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c_type, unpack_func, _pack_func = \ |
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TypeTranslator.get(iectype, (None, None, None)) |
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if c_type is not None and buffoffset < buffsize: |
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cursor = c_void_p(buffptr + buffoffset) |
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value = unpack_func(cast(cursor, |
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POINTER(c_type)).contents) |
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buffoffset += sizeof(c_type) if iectype != "STRING" else len(value)+1 |
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res.append(value) |
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else: |
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return None |
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if buffoffset and buffoffset == buffsize: |
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return res |
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return None |