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12/11/2024 09:39:44 AM
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0README.html
10.75 KB
08/25/2024 02:43:42 PM
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AcManForm.dfm
38.22 KB
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LAparser.py
20.62 KB
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Setup.ini
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SimpleCalc.py
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SingleForm.dfm
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TAP.py
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__init__.py
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adventureEngine.py
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antlr_grammar.py
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antlr_grammar_tests.py
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apicheck.py
2.2 KB
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bf.py
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bigquery_view_parser.py
62.51 KB
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booleansearchparser.py
15.26 KB
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btpyparse.py
4.16 KB
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builtin_parse_action_demo.py
817 bytes
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cLibHeader.py
853 bytes
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chemical_formulas.py
3.17 KB
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commasep.py
707 bytes
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configParse.py
2 KB
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cpp_enum_parser.py
1.35 KB
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cuneiform_python.py
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datetime_parse_actions.py
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decaf_parser.py
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delta_time.py
21.49 KB
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dfmparse.py
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dhcpd_leases_parser.py
2.98 KB
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dictExample.py
1.73 KB
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dictExample2.py
2.1 KB
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directx_x_file_parser.py
5.54 KB
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ebnf.py
4.15 KB
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ebnftest.py
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email_address_parser.py
1.18 KB
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eval_arith.py
6.15 KB
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excel_expr.py
2.2 KB
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fourFn.py
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gen_ctypes.py
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getNTPserversNew.py
1.11 KB
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greeting.py
518 bytes
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greetingInGreek.py
425 bytes
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greetingInKorean.py
495 bytes
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groupUsingListAllMatches.py
509 bytes
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hola_mundo.py
2.02 KB
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html_stripper.py
1.68 KB
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html_table_parser.py
2.16 KB
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httpServerLogParser.py
3.48 KB
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idlParse.py
7.53 KB
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include_preprocessor.py
2.63 KB
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indentedGrammarExample.py
1022 bytes
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indented_block_example.py
712 bytes
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inv_regex.py
8.08 KB
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javascript_grammar.g
18.1 KB
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jsonParser.py
4.7 KB
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left_recursion.py
1.41 KB
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lineno_example.py
1.49 KB
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listAllMatches.py
1.57 KB
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lua_parser.py
7.96 KB
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lucene_grammar.py
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macro_expander.py
1.77 KB
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make_diagram.py
1.62 KB
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matchPreviousDemo.py
586 bytes
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mongodb_query_expression.py
8.46 KB
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mozilla.ics
752 bytes
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mozillaCalendarParser.py
2.71 KB
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nested.py
579 bytes
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nested_markup.py
1.85 KB
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number_words.py
3.77 KB
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numerics.py
1.34 KB
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oc.py
4.34 KB
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one_to_ninety_nine.py
1.88 KB
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parseTabularData.py
1.68 KB
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parse_python_value.py
2.5 KB
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parse_results_sum_example.py
853 bytes
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partial_gene_match.py
2.33 KB
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pgn.py
3.34 KB
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position.py
2.17 KB
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protobuf_parser.py
3.89 KB
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pythonGrammarParser.py
8.08 KB
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railroad_diagram_demo.py
1.55 KB
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range_check.py
2.84 KB
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readJson.py
120.73 KB
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removeLineBreaks.py
1.8 KB
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roman_numerals.py
3.57 KB
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rosettacode.py
7.43 KB
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scanExamples.py
2.36 KB
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searchParserAppDemo.py
962 bytes
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searchparser.py
10.4 KB
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select_parser.py
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sexpParser.py
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shapes.py
1.69 KB
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simpleArith.py
2.42 KB
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simpleBool.py
3.19 KB
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simpleSQL.py
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simpleWiki.py
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snmp_api.h
28.69 KB
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sql2dot.py
3.07 KB
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stackish.py
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statemachine
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tag_emitter.py
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tag_metadata.py
805 bytes
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test_bibparse.py
8.72 KB
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unicode_denormalizer.py
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urlExtractor.py
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urlExtractorNew.py
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verilog_parse.py
31.15 KB
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withAttribute.py
912 bytes
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wordsToNum.py
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Editing: oc.py
Close
# oc.py # # A subset-C parser, (BNF taken from 1996 International Obfuscated C Code Contest) # # Copyright, 2010, Paul McGuire # """ https://www.ioccc.org/1996/august.hint The following is a description of the OC grammar: OC grammar ========== Terminals are in quotes, () is used for bracketing. program: decl* decl: vardecl fundecl vardecl: type NAME ; type NAME "[" INT "]" ; fundecl: type NAME "(" args ")" "{" body "}" args: /*empty*/ ( arg "," )* arg arg: type NAME body: vardecl* stmt* stmt: ifstmt whilestmt dowhilestmt "return" expr ";" expr ";" "{" stmt* "}" ";" ifstmt: "if" "(" expr ")" stmt "if" "(" expr ")" stmt "else" stmt whilestmt: "while" "(" expr ")" stmt dowhilestmt: "do" stmt "while" "(" expr ")" ";" expr: expr binop expr unop expr expr "[" expr "]" "(" expr ")" expr "(" exprs ")" NAME INT CHAR STRING exprs: /*empty*/ (expr ",")* expr binop: "+" | "-" | "*" | "/" | "%" | "=" | "<" | "==" | "!=" unop: "!" | "-" | "*" type: "int" stars "char" stars stars: "*"* """ from pyparsing import * ParserElement.enablePackrat() LPAR, RPAR, LBRACK, RBRACK, LBRACE, RBRACE, SEMI, COMMA = map(Suppress, "()[]{};,") INT, CHAR, WHILE, DO, IF, ELSE, RETURN = map( Keyword, "int char while do if else return".split() ) NAME = Word(alphas + "_", alphanums + "_") integer = Regex(r"[+-]?\d+") char = Regex(r"'.'") string_ = dblQuotedString TYPE = Group((INT | CHAR) + ZeroOrMore("*")) expr = Forward() func_call = Group(NAME + LPAR + Group(Optional(delimitedList(expr))) + RPAR) operand = func_call | NAME | integer | char | string_ expr <<= infixNotation( operand, [ (oneOf("! - *"), 1, opAssoc.RIGHT), (oneOf("++ --"), 1, opAssoc.RIGHT), (oneOf("++ --"), 1, opAssoc.LEFT), (oneOf("* / %"), 2, opAssoc.LEFT), (oneOf("+ -"), 2, opAssoc.LEFT), (oneOf("< == > <= >= !="), 2, opAssoc.LEFT), (Regex(r"(?<!=)=(?!=)"), 2, opAssoc.LEFT), ], ) + Optional( LBRACK + expr + RBRACK | LPAR + Group(Optional(delimitedList(expr))) + RPAR ) stmt = Forward() ifstmt = IF - LPAR + expr + RPAR + stmt + Optional(ELSE + stmt) whilestmt = WHILE - LPAR + expr + RPAR + stmt dowhilestmt = DO - stmt + WHILE + LPAR + expr + RPAR + SEMI returnstmt = RETURN - expr + SEMI stmt << Group( ifstmt | whilestmt | dowhilestmt | returnstmt | expr + SEMI | LBRACE + ZeroOrMore(stmt) + RBRACE | SEMI ) vardecl = Group(TYPE + NAME + Optional(LBRACK + integer + RBRACK)) + SEMI arg = Group(TYPE + NAME) body = ZeroOrMore(vardecl) + ZeroOrMore(stmt) fundecl = Group( TYPE + NAME + LPAR + Optional(Group(delimitedList(arg))) + RPAR + LBRACE + Group(body) + RBRACE ) decl = fundecl | vardecl program = ZeroOrMore(decl) program.ignore(cStyleComment) # set parser element names for vname in ( "ifstmt whilestmt dowhilestmt returnstmt TYPE " "NAME fundecl vardecl program arg body stmt".split() ): v = vars()[vname] v.setName(vname) # ~ for vname in "fundecl stmt".split(): # ~ v = vars()[vname] # ~ v.setDebug() def main(): test = r""" /* A factorial program */ int putstr(char *s) { while(*s) putchar(*s++); } int fac(int n) { if (n == 0) return 1; else return n*fac(n-1); } int putn(int n) { if (9 < n) putn(n / 10); putchar((n%10) + '0'); } int facpr(int n) { putstr("factorial "); putn(n); putstr(" = "); putn(fac(n)); putstr("\n"); } int main() { int i; i = 0; if(a() == 1){} while(i < 10) facpr(i++); return 0; } """ ast = program.parseString(test, parseAll=True) ast.pprint() if __name__ == "__main__": main()