583 lines
21 KiB
Python
Executable File
583 lines
21 KiB
Python
Executable File
#!/usr/bin/env python
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## This Source Code Form is subject to the terms of the Mozilla Public
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## License, v. 2.0. If a copy of the MPL was not distributed with this
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## file, You can obtain one at https://mozilla.org/MPL/2.0/.
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##
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## Copyright (c) 2007-2020 VMware, Inc. or its affiliates. All rights reserved.
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##
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from __future__ import nested_scopes
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from __future__ import print_function
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import sys
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from amqp_codegen import *
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import string
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import re
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# Coming up with a proper encoding of AMQP tables in JSON is too much
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# hassle at this stage. Given that the only default value we are
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# interested in is for the empty table, we only support that.
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def convertTable(d):
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if len(d) == 0:
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return "[]"
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else:
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raise Exception('Non-empty table defaults not supported ' + d)
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erlangDefaultValueTypeConvMap = {
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bool : lambda x: str(x).lower(),
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int : lambda x: str(x),
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float : lambda x: str(x),
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dict: convertTable
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}
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try:
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_checkIfPython2 = unicode
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erlangDefaultValueTypeConvMap[str] = lambda x: "<<\"" + x + "\">>"
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erlangDefaultValueTypeConvMap[unicode] = lambda x: "<<\"" + x.encode("utf-8") + "\">>"
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except NameError:
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erlangDefaultValueTypeConvMap[bytes] = lambda x: "<<\"" + x + "\">>"
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erlangDefaultValueTypeConvMap[str] = lambda x: "<<\"" + x + "\">>"
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def erlangize(s):
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s = s.replace('-', '_')
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s = s.replace(' ', '_')
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return s
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AmqpMethod.erlangName = lambda m: "'" + erlangize(m.klass.name) + '.' + erlangize(m.name) + "'"
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AmqpClass.erlangName = lambda c: "'" + erlangize(c.name) + "'"
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def erlangConstantName(s):
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return '_'.join(re.split('[- ]', s.upper()))
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class PackedMethodBitField:
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def __init__(self, index):
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self.index = index
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self.domain = 'bit'
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self.contents = []
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def extend(self, f):
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self.contents.append(f)
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def count(self):
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return len(self.contents)
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def full(self):
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return self.count() == 8
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def multiLineFormat(things, prologue, separator, lineSeparator, epilogue, thingsPerLine = 4):
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r = [prologue]
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i = 0
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for t in things:
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if i != 0:
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if i % thingsPerLine == 0:
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r += [lineSeparator]
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else:
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r += [separator]
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r += [t]
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i += 1
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r += [epilogue]
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return "".join(r)
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def prettyType(typeName, subTypes, typesPerLine = 4):
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"""Pretty print a type signature made up of many alternative subtypes"""
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sTs = multiLineFormat(subTypes,
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"( ", " | ", "\n | ", " )",
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thingsPerLine = typesPerLine)
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return "-type %s ::\n %s." % (typeName, sTs)
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def printFileHeader():
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print("""%% Autogenerated code. Do not edit.
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%%
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%% This Source Code Form is subject to the terms of the Mozilla Public
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%% License, v. 2.0. If a copy of the MPL was not distributed with this
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%% file, You can obtain one at https://mozilla.org/MPL/2.0/.
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%%
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%% Copyright (c) 2007-2020 VMware, Inc. or its affiliates. All rights reserved.
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%%""")
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def genErl(spec):
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def erlType(domain):
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return erlangize(spec.resolveDomain(domain))
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def fieldTypeList(fields):
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return '[' + ', '.join([erlType(f.domain) for f in fields]) + ']'
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def fieldNameList(fields):
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return '[' + ', '.join([erlangize(f.name) for f in fields]) + ']'
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def fieldTempList(fields):
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return '[' + ', '.join(['F' + str(f.index) for f in fields]) + ']'
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def fieldMapList(fields):
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return ', '.join([erlangize(f.name) + " = F" + str(f.index) for f in fields])
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def genLookupMethodName(m):
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print("lookup_method_name({%d, %d}) -> %s;" % (m.klass.index, m.index, m.erlangName()))
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def genLookupClassName(c):
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print("lookup_class_name(%d) -> %s;" % (c.index, c.erlangName()))
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def genMethodId(m):
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print("method_id(%s) -> {%d, %d};" % (m.erlangName(), m.klass.index, m.index))
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def genMethodHasContent(m):
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print("method_has_content(%s) -> %s;" % (m.erlangName(), str(m.hasContent).lower()))
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def genMethodIsSynchronous(m):
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hasNoWait = "nowait" in fieldNameList(m.arguments)
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if m.isSynchronous and hasNoWait:
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print("is_method_synchronous(#%s{nowait = NoWait}) -> not(NoWait);" % (m.erlangName()))
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else:
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print("is_method_synchronous(#%s{}) -> %s;" % (m.erlangName(), str(m.isSynchronous).lower()))
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def genMethodFieldTypes(m):
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"""Not currently used - may be useful in future?"""
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print("method_fieldtypes(%s) -> %s;" % (m.erlangName(), fieldTypeList(m.arguments)))
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def genMethodFieldNames(m):
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print("method_fieldnames(%s) -> %s;" % (m.erlangName(), fieldNameList(m.arguments)))
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def packMethodFields(fields):
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packed = []
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bitfield = None
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for f in fields:
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if erlType(f.domain) == 'bit':
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if not(bitfield) or bitfield.full():
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bitfield = PackedMethodBitField(f.index)
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packed.append(bitfield)
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bitfield.extend(f)
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else:
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bitfield = None
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packed.append(f)
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return packed
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def methodFieldFragment(f):
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type = erlType(f.domain)
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p = 'F' + str(f.index)
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if type == 'shortstr':
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return p+'Len:8/unsigned, '+p+':'+p+'Len/binary'
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elif type == 'longstr':
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return p+'Len:32/unsigned, '+p+':'+p+'Len/binary'
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elif type == 'octet':
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return p+':8/unsigned'
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elif type == 'short':
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return p+':16/unsigned'
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elif type == 'long':
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return p+':32/unsigned'
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elif type == 'longlong':
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return p+':64/unsigned'
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elif type == 'timestamp':
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return p+':64/unsigned'
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elif type == 'bit':
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return p+'Bits:8'
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elif type == 'table':
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return p+'Len:32/unsigned, '+p+'Tab:'+p+'Len/binary'
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def genFieldPostprocessing(packed, hasContent):
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for f in packed:
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type = erlType(f.domain)
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if type == 'bit':
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for index in range(f.count()):
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print(" F%d = ((F%dBits band %d) /= 0)," % \
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(f.index + index,
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f.index,
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1 << index))
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elif type == 'table':
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print(" F%d = rabbit_binary_parser:parse_table(F%dTab)," % \
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(f.index, f.index))
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# We skip the check on content-bearing methods for
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# speed. This is a sanity check, not a security thing.
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elif type == 'shortstr' and not hasContent:
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print(" rabbit_binary_parser:assert_utf8(F%d)," % (f.index))
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else:
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pass
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def genMethodRecord(m):
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print("method_record(%s) -> #%s{};" % (m.erlangName(), m.erlangName()))
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def genDecodeMethodFields(m):
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packedFields = packMethodFields(m.arguments)
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binaryPattern = ', '.join([methodFieldFragment(f) for f in packedFields])
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if binaryPattern:
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restSeparator = ', '
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else:
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restSeparator = ''
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recordConstructorExpr = '#%s{%s}' % (m.erlangName(), fieldMapList(m.arguments))
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print("decode_method_fields(%s, <<%s>>) ->" % (m.erlangName(), binaryPattern))
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genFieldPostprocessing(packedFields, m.hasContent)
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print(" %s;" % (recordConstructorExpr,))
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def genDecodeProperties(c):
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def presentBin(fields):
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ps = ', '.join(['P' + str(f.index) + ':1' for f in fields])
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return '<<' + ps + ', _:%d, R0/binary>>' % (16 - len(fields),)
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def writePropFieldLine(field):
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i = str(field.index)
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if field.domain == 'bit':
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print(" {F%s, R%s} = {P%s =/= 0, R%s}," % \
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(i, str(field.index + 1), i, i))
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else:
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print(" {F%s, R%s} = if P%s =:= 0 -> {undefined, R%s}; true -> ?%s_VAL(R%s, L%s, V%s, X%s) end," % \
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(i, str(field.index + 1), i, i, erlType(field.domain).upper(), i, i, i, i))
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if len(c.fields) == 0:
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print("decode_properties(%d, <<>>) ->" % (c.index,))
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else:
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print(("decode_properties(%d, %s) ->" %
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(c.index, presentBin(c.fields))))
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for field in c.fields:
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writePropFieldLine(field)
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print(" <<>> = %s," % ('R' + str(len(c.fields))))
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print(" #'P_%s'{%s};" % (erlangize(c.name), fieldMapList(c.fields)))
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def genFieldPreprocessing(packed):
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for f in packed:
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type = erlType(f.domain)
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if type == 'bit':
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print(" F%dBits = (%s)," % \
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(f.index,
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' bor '.join(['(bitvalue(F%d) bsl %d)' % (x.index, x.index - f.index)
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for x in f.contents])))
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elif type == 'table':
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print(" F%dTab = rabbit_binary_generator:generate_table(F%d)," % (f.index, f.index))
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print(" F%dLen = size(F%dTab)," % (f.index, f.index))
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elif type == 'shortstr':
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print(" F%dLen = shortstr_size(F%d)," % (f.index, f.index))
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elif type == 'longstr':
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print(" F%dLen = size(F%d)," % (f.index, f.index))
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else:
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pass
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def genEncodeMethodFields(m):
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packedFields = packMethodFields(m.arguments)
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print("encode_method_fields(#%s{%s}) ->" % (m.erlangName(), fieldMapList(m.arguments)))
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genFieldPreprocessing(packedFields)
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print(" <<%s>>;" % (', '.join([methodFieldFragment(f) for f in packedFields])))
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def genEncodeProperties(c):
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def presentBin(fields):
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ps = ', '.join(['P' + str(f.index) + ':1' for f in fields])
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return '<<' + ps + ', 0:%d>>' % (16 - len(fields),)
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def writePropFieldLine(field):
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i = str(field.index)
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if field.domain == 'bit':
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print(" {P%s, R%s} = {F%s =:= 1, R%s}," % \
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(i, str(field.index + 1), i, i))
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else:
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print(" {P%s, R%s} = if F%s =:= undefined -> {0, R%s}; true -> {1, [?%s_PROP(F%s, L%s) | R%s]} end," % \
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(i, str(field.index + 1), i, i, erlType(field.domain).upper(), i, i, i))
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print("encode_properties(#'P_%s'{%s}) ->" % (erlangize(c.name), fieldMapList(c.fields)))
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if len(c.fields) == 0:
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print(" <<>>;")
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else:
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print(" R0 = [<<>>],")
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for field in c.fields:
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writePropFieldLine(field)
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print(" list_to_binary([%s | lists:reverse(R%s)]);" % \
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(presentBin(c.fields), str(len(c.fields))))
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def messageConstantClass(cls):
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# We do this because 0.8 uses "soft error" and 8.1 uses "soft-error".
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return erlangConstantName(cls)
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def genLookupException(c,v,cls):
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mCls = messageConstantClass(cls)
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if mCls == 'SOFT_ERROR': genLookupException1(c,'false')
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elif mCls == 'HARD_ERROR': genLookupException1(c, 'true')
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elif mCls == '': pass
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else: raise Exception('Unknown constant class' + cls)
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def genLookupException1(c,hardErrorBoolStr):
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n = erlangConstantName(c)
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print('lookup_amqp_exception(%s) -> {%s, ?%s, <<"%s">>};' % \
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(n.lower(), hardErrorBoolStr, n, n))
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def genAmqpException(c,v,cls):
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n = erlangConstantName(c)
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print('amqp_exception(?%s) -> %s;' % \
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(n, n.lower()))
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methods = spec.allMethods()
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printFileHeader()
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module = "rabbit_framing_amqp_%d_%d" % (spec.major, spec.minor)
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if spec.revision != 0:
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module = "%s_%d" % (module, spec.revision)
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if module == "rabbit_framing_amqp_8_0":
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module = "rabbit_framing_amqp_0_8"
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print("-module(%s)." % module)
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print("""-include("rabbit_framing.hrl").
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-export([version/0]).
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-export([lookup_method_name/1]).
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-export([lookup_class_name/1]).
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-export([method_id/1]).
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-export([method_has_content/1]).
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-export([is_method_synchronous/1]).
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-export([method_record/1]).
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-export([method_fieldnames/1]).
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-export([decode_method_fields/2]).
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-export([decode_properties/2]).
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-export([encode_method_fields/1]).
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-export([encode_properties/1]).
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-export([lookup_amqp_exception/1]).
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-export([amqp_exception/1]).
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""")
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print("%% Various types")
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print("""-export_type([amqp_field_type/0, amqp_property_type/0,
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amqp_table/0, amqp_array/0, amqp_value/0,
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amqp_method_name/0, amqp_method/0, amqp_method_record/0,
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amqp_method_field_name/0, amqp_property_record/0,
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amqp_exception/0, amqp_exception_code/0, amqp_class_id/0]).
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-type amqp_field_type() ::
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'longstr' | 'signedint' | 'decimal' | 'timestamp' |
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'unsignedbyte' | 'unsignedshort' | 'unsignedint' |
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'table' | 'byte' | 'double' | 'float' | 'long' |
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'short' | 'bool' | 'binary' | 'void' | 'array'.
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-type amqp_property_type() ::
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'shortstr' | 'longstr' | 'octet' | 'short' | 'long' |
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'longlong' | 'timestamp' | 'bit' | 'table'.
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-type amqp_table() :: [{binary(), amqp_field_type(), amqp_value()}].
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-type amqp_array() :: [{amqp_field_type(), amqp_value()}].
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-type amqp_value() :: binary() | % longstr
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integer() | % signedint
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{non_neg_integer(), non_neg_integer()} | % decimal
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amqp_table() |
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amqp_array() |
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byte() | % byte
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float() | % double
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integer() | % long
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integer() | % short
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boolean() | % bool
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binary() | % binary
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'undefined' | % void
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non_neg_integer(). % timestamp
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""")
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print(prettyType("amqp_method_name()",
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[m.erlangName() for m in methods]))
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print(prettyType("amqp_method()",
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["{%s, %s}" % (m.klass.index, m.index) for m in methods],
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6))
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print(prettyType("amqp_method_record()",
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["#%s{}" % (m.erlangName()) for m in methods]))
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fieldNames = set()
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for m in methods:
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fieldNames.update([erlangize(f.name) for f in m.arguments])
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fieldNames = [f for f in fieldNames]
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fieldNames.sort()
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print(prettyType("amqp_method_field_name()",
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fieldNames))
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print(prettyType("amqp_property_record()",
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["#'P_%s'{}" % erlangize(c.name) for c in spec.allClasses()]))
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print(prettyType("amqp_exception()",
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["'%s'" % erlangConstantName(c).lower() for (c, v, cls) in spec.constants]))
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print(prettyType("amqp_exception_code()",
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["%i" % v for (c, v, cls) in spec.constants]))
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classIds = set()
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for m in spec.allMethods():
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classIds.add(m.klass.index)
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print(prettyType("amqp_class_id()",
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["%i" % ci for ci in classIds]))
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print(prettyType("amqp_class_name()",
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["%s" % c.erlangName() for c in spec.allClasses()]))
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print("""
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%% Method signatures
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-spec version() -> {non_neg_integer(), non_neg_integer(), non_neg_integer()}.
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-spec lookup_method_name(amqp_method()) -> amqp_method_name().
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-spec lookup_class_name(amqp_class_id()) -> amqp_class_name().
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-spec method_id(amqp_method_name()) -> amqp_method().
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-spec method_has_content(amqp_method_name()) -> boolean().
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-spec is_method_synchronous(amqp_method_record()) -> boolean().
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-spec method_record(amqp_method_name()) -> amqp_method_record().
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-spec method_fieldnames(amqp_method_name()) -> [amqp_method_field_name()].
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-spec decode_method_fields(amqp_method_name(), binary()) ->
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amqp_method_record() | rabbit_types:connection_exit().
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-spec decode_properties(non_neg_integer(), binary()) -> amqp_property_record().
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-spec encode_method_fields(amqp_method_record()) -> binary().
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-spec encode_properties(amqp_property_record()) -> binary().
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-spec lookup_amqp_exception(amqp_exception()) ->
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{boolean(), amqp_exception_code(), binary()}.
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-spec amqp_exception(amqp_exception_code()) -> amqp_exception().
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bitvalue(true) -> 1;
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bitvalue(false) -> 0;
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bitvalue(undefined) -> 0.
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shortstr_size(S) ->
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case size(S) of
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Len when Len =< 255 -> Len;
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_ -> exit(method_field_shortstr_overflow)
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end.
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-define(SHORTSTR_VAL(R, L, V, X),
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begin
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<<L:8/unsigned, V:L/binary, X/binary>> = R,
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{V, X}
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end).
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-define(LONGSTR_VAL(R, L, V, X),
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begin
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<<L:32/unsigned, V:L/binary, X/binary>> = R,
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{V, X}
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end).
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-define(SHORT_VAL(R, L, V, X),
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begin
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<<V:8/unsigned, X/binary>> = R,
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{V, X}
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end).
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-define(LONG_VAL(R, L, V, X),
|
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begin
|
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<<V:32/unsigned, X/binary>> = R,
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{V, X}
|
|
end).
|
|
|
|
-define(LONGLONG_VAL(R, L, V, X),
|
|
begin
|
|
<<V:64/unsigned, X/binary>> = R,
|
|
{V, X}
|
|
end).
|
|
|
|
-define(OCTET_VAL(R, L, V, X),
|
|
begin
|
|
<<V:8/unsigned, X/binary>> = R,
|
|
{V, X}
|
|
end).
|
|
|
|
-define(TABLE_VAL(R, L, V, X),
|
|
begin
|
|
<<L:32/unsigned, V:L/binary, X/binary>> = R,
|
|
{rabbit_binary_parser:parse_table(V), X}
|
|
end).
|
|
|
|
-define(TIMESTAMP_VAL(R, L, V, X),
|
|
begin
|
|
<<V:64/unsigned, X/binary>> = R,
|
|
{V, X}
|
|
end).
|
|
|
|
-define(SHORTSTR_PROP(X, L),
|
|
begin
|
|
L = size(X),
|
|
if L < 256 -> <<L:8, X:L/binary>>;
|
|
true -> exit(content_properties_shortstr_overflow)
|
|
end
|
|
end).
|
|
|
|
-define(LONGSTR_PROP(X, L),
|
|
begin
|
|
L = size(X),
|
|
<<L:32, X:L/binary>>
|
|
end).
|
|
|
|
-define(OCTET_PROP(X, L), <<X:8/unsigned>>).
|
|
-define(SHORT_PROP(X, L), <<X:16/unsigned>>).
|
|
-define(LONG_PROP(X, L), <<X:32/unsigned>>).
|
|
-define(LONGLONG_PROP(X, L), <<X:64/unsigned>>).
|
|
-define(TIMESTAMP_PROP(X, L), <<X:64/unsigned>>).
|
|
|
|
-define(TABLE_PROP(X, T),
|
|
begin
|
|
T = rabbit_binary_generator:generate_table(X),
|
|
<<(size(T)):32, T/binary>>
|
|
end).
|
|
""")
|
|
version = "{%d, %d, %d}" % (spec.major, spec.minor, spec.revision)
|
|
if version == '{8, 0, 0}': version = '{0, 8, 0}'
|
|
print("version() -> %s." % (version))
|
|
|
|
for m in methods: genLookupMethodName(m)
|
|
print("lookup_method_name({_ClassId, _MethodId} = Id) -> exit({unknown_method_id, Id}).")
|
|
|
|
for c in spec.allClasses(): genLookupClassName(c)
|
|
print("lookup_class_name(ClassId) -> exit({unknown_class_id, ClassId}).")
|
|
|
|
for m in methods: genMethodId(m)
|
|
print("method_id(Name) -> exit({unknown_method_name, Name}).")
|
|
|
|
for m in methods: genMethodHasContent(m)
|
|
print("method_has_content(Name) -> exit({unknown_method_name, Name}).")
|
|
|
|
for m in methods: genMethodIsSynchronous(m)
|
|
print("is_method_synchronous(Name) -> exit({unknown_method_name, Name}).")
|
|
|
|
for m in methods: genMethodRecord(m)
|
|
print("method_record(Name) -> exit({unknown_method_name, Name}).")
|
|
|
|
for m in methods: genMethodFieldNames(m)
|
|
print("method_fieldnames(Name) -> exit({unknown_method_name, Name}).")
|
|
|
|
for m in methods: genDecodeMethodFields(m)
|
|
print("decode_method_fields(Name, BinaryFields) ->")
|
|
print(" rabbit_misc:frame_error(Name, BinaryFields).")
|
|
|
|
for c in spec.allClasses(): genDecodeProperties(c)
|
|
print("decode_properties(ClassId, _BinaryFields) -> exit({unknown_class_id, ClassId}).")
|
|
|
|
for m in methods: genEncodeMethodFields(m)
|
|
print("encode_method_fields(Record) -> exit({unknown_method_name, element(1, Record)}).")
|
|
|
|
for c in spec.allClasses(): genEncodeProperties(c)
|
|
print("encode_properties(Record) -> exit({unknown_properties_record, Record}).")
|
|
|
|
for (c,v,cls) in spec.constants: genLookupException(c,v,cls)
|
|
print("lookup_amqp_exception(Code) ->")
|
|
print(" rabbit_log:warning(\"Unknown AMQP error code '~p'~n\", [Code]),")
|
|
print(" {true, ?INTERNAL_ERROR, <<\"INTERNAL_ERROR\">>}.")
|
|
|
|
for(c,v,cls) in spec.constants: genAmqpException(c,v,cls)
|
|
print("amqp_exception(_Code) -> undefined.")
|
|
|
|
def genHrl(spec):
|
|
def fieldNameList(fields):
|
|
return ', '.join([erlangize(f.name) for f in fields])
|
|
|
|
def fieldNameListDefaults(fields):
|
|
def fillField(field):
|
|
result = erlangize(field.name)
|
|
if field.defaultvalue != None:
|
|
conv_fn = erlangDefaultValueTypeConvMap[type(field.defaultvalue)]
|
|
result += ' = ' + conv_fn(field.defaultvalue)
|
|
return result
|
|
return ', '.join([fillField(f) for f in fields])
|
|
|
|
methods = spec.allMethods()
|
|
|
|
printFileHeader()
|
|
print("-define(PROTOCOL_PORT, %d)." % (spec.port))
|
|
|
|
for (c,v,cls) in spec.constants:
|
|
print("-define(%s, %s)." % (erlangConstantName(c), v))
|
|
|
|
print("%% Method field records.")
|
|
for m in methods:
|
|
print("-record(%s, {%s})." % (m.erlangName(), fieldNameListDefaults(m.arguments)))
|
|
|
|
print("%% Class property records.")
|
|
for c in spec.allClasses():
|
|
print("-record('P_%s', {%s})." % (erlangize(c.name), fieldNameList(c.fields)))
|
|
|
|
|
|
def generateErl(specPath):
|
|
genErl(AmqpSpec(specPath))
|
|
|
|
def generateHrl(specPath):
|
|
genHrl(AmqpSpec(specPath))
|
|
|
|
if __name__ == "__main__":
|
|
do_main_dict({"header": generateHrl,
|
|
"body": generateErl})
|
|
|