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+%{
+/*
+ * gram.y - message definition language
+ *
+ * Copyright (c) 2009 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+extern void yyerror (char *s);
+extern int yylex (void);
+
+#define YYSTYPE void *
+
+void generate (YYSTYPE);
+ YYSTYPE add_slist(YYSTYPE, YYSTYPE);
+ YYSTYPE add_define(YYSTYPE, YYSTYPE);
+ YYSTYPE suppress_version(void);
+ YYSTYPE add_defbody(YYSTYPE, YYSTYPE);
+ YYSTYPE add_primtype(YYSTYPE, YYSTYPE, YYSTYPE);
+ YYSTYPE add_complex(YYSTYPE, YYSTYPE);
+ YYSTYPE add_union(YYSTYPE, YYSTYPE);
+ YYSTYPE add_scalar_vbl(YYSTYPE);
+ YYSTYPE add_vector_vbl(YYSTYPE, YYSTYPE);
+ YYSTYPE add_variable_length_vector_vbl(YYSTYPE, YYSTYPE);
+ YYSTYPE set_flags(YYSTYPE, YYSTYPE);
+%}
+
+%token NAME RPAR LPAR SEMI LBRACK RBRACK NUMBER PRIMTYPE BARF
+%token TPACKED DEFINE LCURLY RCURLY STRING UNION
+%token HELPER_STRING COMMA
+%token NOVERSION MANUAL_PRINT MANUAL_ENDIAN TYPEONLY DONT_TRACE AUTOREPLY
+
+%%
+
+pgm: slist {generate ($1);}
+ ;
+
+slist: slist stmt {$$ = add_slist ($1, $2);}
+ | stmt {$$ = $1;}
+ ;
+
+stmt: flist defn {$$ = set_flags($1, $2);}
+ | defn {$$ = $1;}
+ ;
+
+flist: flist flag {$$ = (YYSTYPE)(unsigned long)
+ ((unsigned long) $1
+ | (unsigned long) $2);}
+ | flag {$$ = $1;}
+ ;
+
+flag:
+ MANUAL_PRINT {$$ = $1;}
+ | MANUAL_ENDIAN {$$ = $1;}
+ | DONT_TRACE {$$ = $1;}
+ | TYPEONLY {$$ = $1;}
+ | AUTOREPLY {$$ = $1;}
+ ;
+
+defn: DEFINE NAME LCURLY defbody RCURLY SEMI
+ {$$ = add_define($2, $4);}
+
+ | NOVERSION SEMI
+ {$$ = suppress_version();}
+ ;
+
+defbody: defbody onedef {$$ = add_defbody($1, $2);}
+ | onedef {$$ = $1;}
+ ;
+
+onedef: PRIMTYPE vbl SEMI {$$ = add_primtype($1, $2, 0);}
+ | TPACKED PRIMTYPE vbl SEMI {$$ = add_primtype($1, $2, $3);}
+ | NAME vbl SEMI {$$ = add_complex($1, $2);}
+ | UNION NAME LCURLY defbody RCURLY SEMI
+ {$$ = add_union($2, $4);}
+ ;
+
+vbl: NAME {$$ = add_scalar_vbl($1);}
+ | NAME LBRACK NUMBER RBRACK {$$ = add_vector_vbl($1, $3);}
+ | NAME LBRACK NAME RBRACK {$$ = add_variable_length_vector_vbl($1, $3);}
+ ;