mirror of
https://github.com/Sei-Lisa/LSL-PyOptimizer
synced 2024-11-21 14:18:57 -07:00
94 lines
3.7 KiB
Python
94 lines
3.7 KiB
Python
# (C) Copyright 2015-2022 Sei Lisa. All rights reserved.
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#
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# This file is part of LSL PyOptimizer.
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#
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# LSL PyOptimizer is free software: you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# LSL PyOptimizer is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with LSL PyOptimizer. If not, see <http://www.gnu.org/licenses/>.
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# Interface for Niall Douglas' and David M. Beazley's PCPP (a C preprocessor)
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import sys, os
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oldsyspath = sys.path
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sys.path.insert(0, os.path.join(os.path.dirname(os.path.abspath(__file__)),
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'pcpp'))
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from pcpp import preprocessor, OutputDirective, Action
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path = oldsyspath
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DIRECTIVES_PASSED_THROUGH = {'warning', 'pragma', 'line'}
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class Preproc(preprocessor.Preprocessor):
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def __init__(self, input, params=()):
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super(Preproc, self).__init__()
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self.auto_pragma_once_enabled = False
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for v in params:
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if v.startswith('-I'):
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self.add_path(v[2:])
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elif v.startswith('-D'):
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defn = v[2:]
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if '=' not in defn:
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defn += '=1'
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if defn.startswith('='):
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self.on_error("\nError: Empty macro name in definition.\n")
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return
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defn = defn.replace('=', ' ', 1)
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self.define(defn)
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elif v.startswith('-U'):
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defn = v[2:]
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if defn in self.macros:
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del self.macros[defn]
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else:
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self.on_error("\nError: Option for the internal"
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" preprocessor not -D, -U or -I:\n %s\n" % v)
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return
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self.ignore = set()
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self.parser = self.parsegen(input, '<stdin>', '<stdin>')
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self.errors_present = False
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def get(self):
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if self.errors_present:
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return True, '', {}
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try:
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import StringIO
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except ImportError:
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import io as StringIO
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ret = StringIO.StringIO()
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self.write(ret)
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return (self.errors_present, ret.getvalue(), self.macros)
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def on_error(self, *args, **kwargs):
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"""Flag that errors are present when called."""
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self.errors_present = True
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return super(Preproc, self).on_error(*args, **kwargs)
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def on_include_not_found(self, is_malformed, is_system_include, curdir,
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includepath):
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"""Don't pass through the #include line if the file does not exist."""
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if is_malformed:
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self.on_error(self.lastdirective.source, self.lastdirective.lineno,
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"Malformed include file directive")
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else:
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self.on_error(self.lastdirective.source, self.lastdirective.lineno,
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"Include file not found: %s" % includepath)
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raise OutputDirective(Action.IgnoreAndRemove)
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def on_directive_unknown(self, directive, toks, ifpassthru, precedingtoks):
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"""pcpp does not process #error/#warning/#pragma/#line; do it here."""
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if directive.value == 'error':
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self.on_error(directive.source, directive.lineno,
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"Error directive: \"%s\"" % ''.join(i.value for i in toks))
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elif directive.value not in DIRECTIVES_PASSED_THROUGH:
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self.on_error(directive.source, directive.lineno,
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"Unknown directive: \"%s\"" % directive.value)
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