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103 lines
2.9 KiB
Python
103 lines
2.9 KiB
Python
#!/usr/bin/env python
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# -*- python -*-
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#BEGIN_LEGAL
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#
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#Copyright (c) 2016 Intel Corporation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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#END_LEGAL
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import constraint_vec_gen # FIXME: not used, delete
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import codegen
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import actions
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import ild_phash
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import actions_codegen
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import verbosity
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class func_gen_t(object):
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def __init__(self,cvg, fname):
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self.cvg = cvg # constraint vector generator
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self.fname = fname
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def _gen_empty_function(self,fname):
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''' generate a function without constraints '''
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return_type = 'xed_uint32_t'
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fo = codegen.function_object_t(fname,
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return_type=return_type,
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static=False,
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inline=False)
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obj_type = self.cvg.strings_dict['obj_type']
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obj_str = self.cvg.strings_dict['obj_str']
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arg = "%s* %s" % (obj_type, obj_str)
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fo.add_arg(arg)
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lines = self.cvg.action_codegen.emit_default()
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for line in lines:
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if line == 'return ':
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fo.add_code_eol('return 1')
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else:
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fo.add_code_eol(line)
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fo.add_code_eol('(void)%s' % obj_str)
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fo.add_code_eol('return 1')
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return fo
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def gen_function(self):
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''' returns tuple of:
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1) list functions (we can have several functions in case we
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need to levels of hashing)
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2) the operands lookup function (generates the key)
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'''
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action_codegen = actions_codegen.actions_codegen_t(self.cvg.tuple2rule,
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self.cvg.default_action,
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self.cvg.strings_dict)
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self.cvg.action_codegen = action_codegen
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if self.cvg.no_constraints():
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fo = self._gen_empty_function(self.fname)
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return [fo], None
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phash = ild_phash.gen_hash(self.cvg)
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if phash == None:
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genutil.die("Failed to find perfect hash for %s" % self.fname)
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if verbosity.vfuncgen():
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self.cvg.log.write("%s" % phash)
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fos, operand_lu_fo = phash.gen_find_fos(self.fname)
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return fos, operand_lu_fo
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