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+/*
+ * Copyright (c) 2008 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+enum hx_expr_op {
+ op_TRUE,
+ op_FALSE,
+ op_NOT,
+ op_AND,
+ op_OR,
+ op_COMP,
+
+ comp_EQ,
+ comp_NE,
+ comp_IN,
+ comp_TAILEQ,
+
+ expr_NUMBER,
+ expr_STRING,
+ expr_FUNCTION,
+ expr_VAR,
+ expr_WORDS
+};
+
+struct hx_expr {
+ enum hx_expr_op op;
+ void *arg1;
+ void *arg2;
+};
+
+struct hx_expr_input {
+ const char *buf;
+ size_t length;
+ size_t offset;
+ struct hx_expr *expr;
+ char *error;
+};
+
+extern struct hx_expr_input _hx509_expr_input;
+
+/*
+ * With bison/flex, the more modern way to allow multiple yacc/lex grammars to
+ * be linked into a single executable is to use the
+ *
+ * bison: -p, --name-prefix=,PREFIX/, -Dapi.prefix=PREFIX
+ * flex: -Pprefix, --prefix=STRING
+ *
+ * options, these take care of renaming all the machine-generated global entry
+ * points, some of which are new. When these options are used "yylex",
+ * "yyparse", ... are already defined and our (potentially incomplete) attempt
+ * to do the same conflicts with the "right" new way to handle this. The below
+ * logic gets us out of the way when the job has already been taken care of by
+ * the parser-generator.
+ */
+#if !defined(yylex)
+#define yylex _hx509_sel_yylex
+#define yywrap _hx509_sel_yywrap
+#endif
+#if !defined(yyparse)
+#define yyparse _hx509_sel_yyparse
+#define yyerror _hx509_sel_yyerror
+#define yylval _hx509_sel_yylval
+#define yychar _hx509_sel_yychar
+#define yydebug _hx509_sel_yydebug
+#define yynerrs _hx509_sel_yynerrs
+#endif
+
+int _hx509_sel_yyparse(void);
+int _hx509_sel_yylex(void);
+void _hx509_sel_yyerror(const char *);
+