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606887dfbd6f4c82467e8575cd9d74d20f85f923
mdbtools/src/sql/parser.c

483 lines
13 KiB
C
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added like operator and handling of string sargs Added index stuff to HACKING file Misc. mdb-sql updates
2001-04-20 21:06:46 +00:00
#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)
#define YYPREFIX "yy"
#line 2 "parser.y"
#include "mdbsql.h"
MdbSQL *g_sql;
#line 7 "parser.y"
typedef union {
char *name;
double dval;
int ival;
} YYSTYPE;
#line 22 "y.tab.c"
#define NAME 257
#define PATH 258
#define NUMBER 259
#define STRING 260
#define SELECT 261
#define FROM 262
#define WHERE 263
#define CONNECT 264
#define DISCONNECT 265
#define TO 266
#define LIST 267
#define TABLES 268
#define AND 269
#define DESCRIBE 270
#define TABLE 271
#define LTEQ 272
#define GTEQ 273
#define LIKE 274
#define YYERRCODE 256
short yylhs[] = { -1,
0, 0, 0, 0, 0, 3, 3, 5, 5, 6,
6, 7, 7, 7, 7, 7, 7, 8, 8, 4,
4, 2, 1, 1, 1, 9,
};
short yylen[] = { 2,
5, 3, 1, 3, 2, 0, 2, 1, 3, 3,
3, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 3, 1,
};
short yydefred[] = { 0,
0, 0, 3, 0, 0, 0, 26, 23, 0, 0,
0, 5, 0, 0, 0, 21, 20, 2, 22, 4,
0, 25, 0, 1, 0, 18, 19, 7, 0, 0,
15, 16, 17, 12, 13, 14, 0, 0, 0, 10,
9, 11,
};
short yydgoto[] = { 6,
9, 20, 24, 18, 28, 29, 37, 30, 10,
};
short yysindex[] = { -254,
-42, -263, 0, -250, -252, 0, 0, 0, -242, -27,
-256, 0, -236, -236, -42, 0, 0, 0, 0, 0,
-241, 0, -245, 0, -56, 0, 0, 0, -246, -56,
0, 0, 0, 0, 0, 0, -251, -245, -233, 0,
0, 0,
};
short yyrindex[] = { 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, -237,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
26, 0, 0, 0, 0, 0, 0, 0, 27, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0,
};
short yygindex[] = { 0,
13, 15, 0, 0, -8, 0, 1, -5, 0,
};
#define YYTABLESIZE 218
short yytable[] = { 8,
16, 17, 11, 36, 34, 35, 1, 26, 27, 2,
3, 25, 4, 26, 27, 5, 15, 12, 13, 14,
19, 23, 38, 42, 24, 6, 8, 22, 21, 41,
39, 40, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 7, 31, 32, 33,
};
short yycheck[] = { 42,
257, 258, 266, 60, 61, 62, 261, 259, 260, 264,
265, 257, 267, 259, 260, 270, 44, 268, 271, 262,
257, 263, 269, 257, 262, 0, 0, 15, 14, 38,
30, 37, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, 257, 272, 273, 274,
};
#define YYFINAL 6
#ifndef YYDEBUG
#define YYDEBUG 0
#endif
#define YYMAXTOKEN 274
#if YYDEBUG
char *yyname[] = {
"end-of-file",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,"'*'",0,"','",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,"'<'","'='","'>'",0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,"NAME","PATH",
"NUMBER","STRING","SELECT","FROM","WHERE","CONNECT","DISCONNECT","TO","LIST",
"TABLES","AND","DESCRIBE","TABLE","LTEQ","GTEQ","LIKE",
};
char *yyrule[] = {
"$accept : query",
"query : SELECT column_list FROM table where_clause",
"query : CONNECT TO database",
"query : DISCONNECT",
"query : DESCRIBE TABLE table",
"query : LIST TABLES",
"where_clause :",
"where_clause : WHERE sarg_list",
"sarg_list : sarg",
"sarg_list : sarg AND sarg_list",
"sarg : NAME operator constant",
"sarg : constant operator NAME",
"operator : '='",
"operator : '>'",
"operator : '<'",
"operator : LTEQ",
"operator : GTEQ",
"operator : LIKE",
"constant : NUMBER",
"constant : STRING",
"database : PATH",
"database : NAME",
"table : NAME",
"column_list : '*'",
"column_list : column",
"column_list : column ',' column_list",
"column : NAME",
};
#endif
#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
#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)
{
case 1:
#line 21 "parser.y"
{
mdb_sql_select(g_sql);
}
break;
case 2:
#line 24 "parser.y"
{
mdb_sql_open(g_sql, yyvsp[0].name); free(yyvsp[0].name);
}
break;
case 3:
#line 27 "parser.y"
{
mdb_sql_close(g_sql);
}
break;
case 4:
#line 30 "parser.y"
{
mdb_sql_describe_table(g_sql);
}
break;
case 5:
#line 33 "parser.y"
{
mdb_sql_listtables(g_sql);
}
break;
case 10:
#line 49 "parser.y"
{
mdb_sql_add_sarg(g_sql, yyvsp[-2].name, yyvsp[-1].ival, yyvsp[0].name);
free(yyvsp[-2].name);
free(yyvsp[0].name);
}
break;
case 11:
#line 54 "parser.y"
{
mdb_sql_add_sarg(g_sql, yyvsp[0].name, yyvsp[-1].ival, yyvsp[-2].name);
free(yyvsp[-2].name);
free(yyvsp[0].name);
}
break;
case 12:
#line 62 "parser.y"
{ yyval.ival = MDB_EQUAL; }
break;
case 13:
#line 63 "parser.y"
{ yyval.ival = MDB_GT; }
break;
case 14:
#line 64 "parser.y"
{ yyval.ival = MDB_LT; }
break;
case 15:
#line 65 "parser.y"
{ yyval.ival = MDB_LTEQ; }
break;
case 16:
#line 66 "parser.y"
{ yyval.ival = MDB_GTEQ; }
break;
case 17:
#line 67 "parser.y"
{ yyval.ival = MDB_LIKE; }
break;
case 18:
#line 70 "parser.y"
{ yyval.name = yyvsp[0].name; }
break;
case 19:
#line 71 "parser.y"
{ yyval.name = yyvsp[0].name; }
break;
case 22:
#line 79 "parser.y"
{ mdb_sql_add_table(g_sql, yyvsp[0].name); free(yyvsp[0].name); }
break;
case 23:
#line 83 "parser.y"
{ mdb_sql_all_columns(g_sql); }
break;
case 26:
#line 89 "parser.y"
{ mdb_sql_add_column(g_sql, yyvsp[0].name); free(yyvsp[0].name); }
break;
#line 427 "y.tab.c"
}
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);
}
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