diff options
Diffstat (limited to 'usr.bin/yacc/skeleton.c')
-rw-r--r-- | usr.bin/yacc/skeleton.c | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/usr.bin/yacc/skeleton.c b/usr.bin/yacc/skeleton.c new file mode 100644 index 0000000..1e51b2e --- /dev/null +++ b/usr.bin/yacc/skeleton.c @@ -0,0 +1,346 @@ +/* + * Copyright (c) 1989 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Robert Paul Corbett. + * + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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. + */ + +#ifndef lint +static char sccsid[] = "@(#)skeleton.c 5.7 (Berkeley) 5/24/93"; +#endif /* not lint */ + +#include "defs.h" + +/* The definition of yysccsid in the banner should be replaced with */ +/* a #pragma ident directive if the target C compiler supports */ +/* #pragma ident directives. */ +/* */ +/* If the skeleton is changed, the banner should be changed so that */ +/* the altered version can be easily distinguished from the original. */ +/* */ +/* The #defines included with the banner are there because they are */ +/* useful in subsequent code. The macros #defined in the header or */ +/* the body either are not useful outside of semantic actions or */ +/* are conditional. */ + +char *banner[] = +{ + "#ifndef lint", + "static char yysccsid[] = \"@(#)yaccpar 1.9 (Berkeley) 02/21/93\";", + "#endif", + "#define YYBYACC 1", + "#define YYMAJOR 1", + "#define YYMINOR 9", + "#define yyclearin (yychar=(-1))", + "#define yyerrok (yyerrflag=0)", + "#define YYRECOVERING (yyerrflag!=0)", + 0 +}; + + +char *tables[] = +{ + "extern short yylhs[];", + "extern short yylen[];", + "extern short yydefred[];", + "extern short yydgoto[];", + "extern short yysindex[];", + "extern short yyrindex[];", + "extern short yygindex[];", + "extern short yytable[];", + "extern short yycheck[];", + "#if YYDEBUG", + "extern char *yyname[];", + "extern char *yyrule[];", + "#endif", + 0 +}; + + +char *header[] = +{ + "#ifdef YYSTACKSIZE", + "#undef YYMAXDEPTH", + "#define YYMAXDEPTH YYSTACKSIZE", + "#else", + "#ifdef YYMAXDEPTH", + "#define YYSTACKSIZE YYMAXDEPTH", + "#else", + "#define YYSTACKSIZE 500", + "#define YYMAXDEPTH 500", + "#endif", + "#endif", + "int yydebug;", + "int yynerrs;", + "int yyerrflag;", + "int yychar;", + "short *yyssp;", + "YYSTYPE *yyvsp;", + "YYSTYPE yyval;", + "YYSTYPE yylval;", + "short yyss[YYSTACKSIZE];", + "YYSTYPE yyvs[YYSTACKSIZE];", + "#define yystacksize YYSTACKSIZE", + 0 +}; + + +char *body[] = +{ + "#define YYABORT goto yyabort", + "#define YYREJECT goto yyabort", + "#define YYACCEPT goto yyaccept", + "#define YYERROR goto yyerrlab", + "int", + "yyparse()", + "{", + " register int yym, yyn, yystate;", + "#if YYDEBUG", + " register char *yys;", + " extern char *getenv();", + "", + " if (yys = getenv(\"YYDEBUG\"))", + " {", + " yyn = *yys;", + " if (yyn >= '0' && yyn <= '9')", + " yydebug = yyn - '0';", + " }", + "#endif", + "", + " yynerrs = 0;", + " yyerrflag = 0;", + " yychar = (-1);", + "", + " yyssp = yyss;", + " yyvsp = yyvs;", + " *yyssp = yystate = 0;", + "", + "yyloop:", + " if (yyn = yydefred[yystate]) goto yyreduce;", + " if (yychar < 0)", + " {", + " if ((yychar = yylex()) < 0) yychar = 0;", + "#if YYDEBUG", + " if (yydebug)", + " {", + " yys = 0;", + " if (yychar <= YYMAXTOKEN) yys = yyname[yychar];", + " if (!yys) yys = \"illegal-symbol\";", + " printf(\"%sdebug: state %d, reading %d (%s)\\n\",", + " YYPREFIX, yystate, yychar, yys);", + " }", + "#endif", + " }", + " if ((yyn = yysindex[yystate]) && (yyn += yychar) >= 0 &&", + " yyn <= YYTABLESIZE && yycheck[yyn] == yychar)", + " {", + "#if YYDEBUG", + " if (yydebug)", + " printf(\"%sdebug: state %d, shifting to state %d\\n\",", + " YYPREFIX, yystate, yytable[yyn]);", + "#endif", + " if (yyssp >= yyss + yystacksize - 1)", + " {", + " goto yyoverflow;", + " }", + " *++yyssp = yystate = yytable[yyn];", + " *++yyvsp = yylval;", + " yychar = (-1);", + " if (yyerrflag > 0) --yyerrflag;", + " goto yyloop;", + " }", + " if ((yyn = yyrindex[yystate]) && (yyn += yychar) >= 0 &&", + " yyn <= YYTABLESIZE && yycheck[yyn] == yychar)", + " {", + " yyn = yytable[yyn];", + " goto yyreduce;", + " }", + " if (yyerrflag) goto yyinrecovery;", + "#ifdef lint", + " goto yynewerror;", + "#endif", + "yynewerror:", + " yyerror(\"syntax error\");", + "#ifdef lint", + " goto yyerrlab;", + "#endif", + "yyerrlab:", + " ++yynerrs;", + "yyinrecovery:", + " if (yyerrflag < 3)", + " {", + " yyerrflag = 3;", + " for (;;)", + " {", + " if ((yyn = yysindex[*yyssp]) && (yyn += YYERRCODE) >= 0 &&", + " yyn <= YYTABLESIZE && yycheck[yyn] == YYERRCODE)", + " {", + "#if YYDEBUG", + " if (yydebug)", + " printf(\"%sdebug: state %d, error recovery shifting\\", + " to state %d\\n\", YYPREFIX, *yyssp, yytable[yyn]);", + "#endif", + " if (yyssp >= yyss + yystacksize - 1)", + " {", + " goto yyoverflow;", + " }", + " *++yyssp = yystate = yytable[yyn];", + " *++yyvsp = yylval;", + " goto yyloop;", + " }", + " else", + " {", + "#if YYDEBUG", + " if (yydebug)", + " printf(\"%sdebug: error recovery discarding state %d\ +\\n\",", + " YYPREFIX, *yyssp);", + "#endif", + " if (yyssp <= yyss) goto yyabort;", + " --yyssp;", + " --yyvsp;", + " }", + " }", + " }", + " else", + " {", + " if (yychar == 0) goto yyabort;", + "#if YYDEBUG", + " if (yydebug)", + " {", + " yys = 0;", + " if (yychar <= YYMAXTOKEN) yys = yyname[yychar];", + " if (!yys) yys = \"illegal-symbol\";", + " printf(\"%sdebug: state %d, error recovery discards token %d\ + (%s)\\n\",", + " YYPREFIX, yystate, yychar, yys);", + " }", + "#endif", + " yychar = (-1);", + " goto yyloop;", + " }", + "yyreduce:", + "#if YYDEBUG", + " if (yydebug)", + " printf(\"%sdebug: state %d, reducing by rule %d (%s)\\n\",", + " YYPREFIX, yystate, yyn, yyrule[yyn]);", + "#endif", + " yym = yylen[yyn];", + " yyval = yyvsp[1-yym];", + " switch (yyn)", + " {", + 0 +}; + + +char *trailer[] = +{ + " }", + " yyssp -= yym;", + " yystate = *yyssp;", + " yyvsp -= yym;", + " yym = yylhs[yyn];", + " if (yystate == 0 && yym == 0)", + " {", + "#if YYDEBUG", + " if (yydebug)", + " printf(\"%sdebug: after reduction, shifting from state 0 to\\", + " state %d\\n\", YYPREFIX, YYFINAL);", + "#endif", + " yystate = YYFINAL;", + " *++yyssp = YYFINAL;", + " *++yyvsp = yyval;", + " if (yychar < 0)", + " {", + " if ((yychar = yylex()) < 0) yychar = 0;", + "#if YYDEBUG", + " if (yydebug)", + " {", + " yys = 0;", + " if (yychar <= YYMAXTOKEN) yys = yyname[yychar];", + " if (!yys) yys = \"illegal-symbol\";", + " printf(\"%sdebug: state %d, reading %d (%s)\\n\",", + " YYPREFIX, YYFINAL, yychar, yys);", + " }", + "#endif", + " }", + " if (yychar == 0) goto yyaccept;", + " goto yyloop;", + " }", + " if ((yyn = yygindex[yym]) && (yyn += yystate) >= 0 &&", + " yyn <= YYTABLESIZE && yycheck[yyn] == yystate)", + " yystate = yytable[yyn];", + " else", + " yystate = yydgoto[yym];", + "#if YYDEBUG", + " if (yydebug)", + " printf(\"%sdebug: after reduction, shifting from state %d \\", + "to state %d\\n\", YYPREFIX, *yyssp, yystate);", + "#endif", + " if (yyssp >= yyss + yystacksize - 1)", + " {", + " goto yyoverflow;", + " }", + " *++yyssp = yystate;", + " *++yyvsp = yyval;", + " goto yyloop;", + "yyoverflow:", + " yyerror(\"yacc stack overflow\");", + "yyabort:", + " return (1);", + "yyaccept:", + " return (0);", + "}", + 0 +}; + + +write_section(section) +char *section[]; +{ + register int c; + register int i; + register char *s; + register FILE *f; + + f = code_file; + for (i = 0; s = section[i]; ++i) + { + ++outline; + while (c = *s) + { + putc(c, f); + ++s; + } + putc('\n', f); + } +} |