parse.c

嵌入式数据系统软件！

/* Driver template for the LEMON parser generator.
** The author disclaims copyright to this source code.
*/
/* First off, code is include which follows the "include" declaration
** in the input file. */
#include <stdio.h>
#line 56 "parse.y"

#include "sqliteInt.h"

/*
** An instance of this structure holds information about the
** LIMIT clause of a SELECT statement.
*/
struct LimitVal {
  Expr *pLimit;    /* The LIMIT expression.  NULL if there is no limit */
  Expr *pOffset;   /* The OFFSET expression.  NULL if there is none */
};

/*
** An instance of this structure is used to store the LIKE,
** GLOB, NOT LIKE, and NOT GLOB operators.
*/
struct LikeOp {
  Token eOperator;  /* "like" or "glob" or "regexp" */
  int not;         /* True if the NOT keyword is present */
};

/*
** An instance of the following structure describes the event of a
** TRIGGER.  "a" is the event type, one of TK_UPDATE, TK_INSERT,
** TK_DELETE, or TK_INSTEAD.  If the event is of the form
**
**      UPDATE ON (a,b,c)
**
** Then the "b" IdList records the list "a,b,c".
*/
struct TrigEvent { int a; IdList * b; };

/*
** An instance of this structure holds the ATTACH key and the key type.
*/
struct AttachKey { int type;  Token key; };

#line 47 "parse.c"
/* Next is all token values, in a form suitable for use by makeheaders.
** This section will be null unless lemon is run with the -m switch.
*/
/* 
** These constants (all generated automatically by the parser generator)
** specify the various kinds of tokens (terminals) that the parser
** understands. 
**
** Each symbol here is a terminal symbol in the grammar.
*/
/* Make sure the INTERFACE macro is defined.
*/
#ifndef INTERFACE
# define INTERFACE 1
#endif
/* The next thing included is series of defines which control
** various aspects of the generated parser.
**    YYCODETYPE         is the data type used for storing terminal
**                       and nonterminal numbers.  "unsigned char" is
**                       used if there are fewer than 250 terminals
**                       and nonterminals.  "int" is used otherwise.
**    YYNOCODE           is a number of type YYCODETYPE which corresponds
**                       to no legal terminal or nonterminal number.  This
**                       number is used to fill in empty slots of the hash 
**                       table.
**    YYFALLBACK         If defined, this indicates that one or more tokens
**                       have fall-back values which should be used if the
**                       original value of the token will not parse.
**    YYACTIONTYPE       is the data type used for storing terminal
**                       and nonterminal numbers.  "unsigned char" is
**                       used if there are fewer than 250 rules and
**                       states combined.  "int" is used otherwise.
**    sqlite3ParserTOKENTYPE     is the data type used for minor tokens given 
**                       directly to the parser from the tokenizer.
**    YYMINORTYPE        is the data type used for all minor tokens.
**                       This is typically a union of many types, one of
**                       which is sqlite3ParserTOKENTYPE.  The entry in the union
**                       for base tokens is called "yy0".
**    YYSTACKDEPTH       is the maximum depth of the parser's stack.  If
**                       zero the stack is dynamically sized using realloc()
**    sqlite3ParserARG_SDECL     A static variable declaration for the %extra_argument
**    sqlite3ParserARG_PDECL     A parameter declaration for the %extra_argument
**    sqlite3ParserARG_STORE     Code to store %extra_argument into yypParser
**    sqlite3ParserARG_FETCH     Code to extract %extra_argument from yypParser
**    YYNSTATE           the combined number of states.
**    YYNRULE            the number of rules in the grammar
**    YYERRORSYMBOL      is the code number of the error symbol.  If not
**                       defined, then do no error processing.
*/
#define YYCODETYPE unsigned char
#define YYNOCODE 248
#define YYACTIONTYPE unsigned short int
#define YYWILDCARD 59
#define sqlite3ParserTOKENTYPE Token
typedef union {
  sqlite3ParserTOKENTYPE yy0;
  int yy46;
  struct LikeOp yy72;
  Expr* yy172;
  ExprList* yy174;
  Select* yy219;
  struct LimitVal yy234;
  TriggerStep* yy243;
  struct TrigEvent yy370;
  SrcList* yy373;
  Expr * yy386;
  struct {int value; int mask;} yy405;
  Token yy410;
  IdList* yy432;
  int yy495;
} YYMINORTYPE;
#ifndef YYSTACKDEPTH
#define YYSTACKDEPTH 100
#endif
#define sqlite3ParserARG_SDECL Parse *pParse;
#define sqlite3ParserARG_PDECL ,Parse *pParse
#define sqlite3ParserARG_FETCH Parse *pParse = yypParser->pParse
#define sqlite3ParserARG_STORE yypParser->pParse = pParse
#define YYNSTATE 588
#define YYNRULE 312
#define YYERRORSYMBOL 138
#define YYERRSYMDT yy495
#define YYFALLBACK 1
#define YY_NO_ACTION      (YYNSTATE+YYNRULE+2)
#define YY_ACCEPT_ACTION  (YYNSTATE+YYNRULE+1)
#define YY_ERROR_ACTION   (YYNSTATE+YYNRULE)

/* Next are that tables used to determine what action to take based on the
** current state and lookahead token.  These tables are used to implement
** functions that take a state number and lookahead value and return an
** action integer.  
**
** Suppose the action integer is N.  Then the action is determined as
** follows
**
**   0 <= N < YYNSTATE                  Shift N.  That is, push the lookahead
**                                      token onto the stack and goto state N.
**
**   YYNSTATE <= N < YYNSTATE+YYNRULE   Reduce by rule N-YYNSTATE.
**
**   N == YYNSTATE+YYNRULE              A syntax error has occurred.
**
**   N == YYNSTATE+YYNRULE+1            The parser accepts its input.
**
**   N == YYNSTATE+YYNRULE+2            No such action.  Denotes unused
**                                      slots in the yy_action[] table.
**
** The action table is constructed as a single large table named yy_action[].
** Given state S and lookahead X, the action is computed as
**
**      yy_action[ yy_shift_ofst[S] + X ]
**
** If the index value yy_shift_ofst[S]+X is out of range or if the value
** yy_lookahead[yy_shift_ofst[S]+X] is not equal to X or if yy_shift_ofst[S]
** is equal to YY_SHIFT_USE_DFLT, it means that the action is not in the table
** and that yy_default[S] should be used instead.  
**
** The formula above is for computing the action when the lookahead is
** a terminal symbol.  If the lookahead is a non-terminal (as occurs after
** a reduce action) then the yy_reduce_ofst[] array is used in place of
** the yy_shift_ofst[] array and YY_REDUCE_USE_DFLT is used in place of
** YY_SHIFT_USE_DFLT.
**
** The following are the tables generated in this section:
**
**  yy_action[]        A single table containing all actions.
**  yy_lookahead[]     A table containing the lookahead for each entry in
**                     yy_action.  Used to detect hash collisions.
**  yy_shift_ofst[]    For each state, the offset into yy_action for
**                     shifting terminals.
**  yy_reduce_ofst[]   For each state, the offset into yy_action for
**                     shifting non-terminals after a reduce.
**  yy_default[]       Default action for each state.
*/
static const YYACTIONTYPE yy_action[] = {
 /*     0 */   299,  901,  124,  587,  416,  174,    2,  425,   61,   61,
 /*    10 */    61,   61,  297,   63,   63,   63,   63,   64,   64,   65,
 /*    20 */    65,   65,   66,  212,  454,  214,  432,  438,   68,   63,
 /*    30 */    63,   63,   63,   64,   64,   65,   65,   65,   66,  212,
 /*    40 */   398,  395,  403,  458,   60,   59,  304,  442,  443,  439,
 /*    50 */   439,   62,   62,   61,   61,   61,   61,  265,   63,   63,
 /*    60 */    63,   63,   64,   64,   65,   65,   65,   66,  212,  299,
 /*    70 */   500,  501,  425,  496,  210,   82,   67,  427,   69,  156,
 /*    80 */    63,   63,   63,   63,   64,   64,   65,   65,   65,   66,
 /*    90 */   212,   67,  469,   69,  156,  432,  438,  573,  266,   58,
 /*   100 */    64,   64,   65,   65,   65,   66,  212,  404,  405,  429,
 /*   110 */   429,  429,  299,   60,   59,  304,  442,  443,  439,  439,
 /*   120 */    62,   62,   61,   61,   61,   61,  324,   63,   63,   63,
 /*   130 */    63,   64,   64,   65,   65,   65,   66,  212,  432,  438,
 /*   140 */    94,   65,   65,   65,   66,  212,  403,  212,  421,   34,
 /*   150 */    56,  305,  449,  450,  417,  481,   60,   59,  304,  442,
 /*   160 */   443,  439,  439,   62,   62,   61,   61,   61,   61,  495,
 /*   170 */    63,   63,   63,   63,   64,   64,   65,   65,   65,   66,
 /*   180 */   212,  299,  259,  524,  203,  571,  113,  415,  522,  458,
 /*   190 */   338,  324,  414,   20,  241,  347,  297,  403,  471,  531,
 /*   200 */   292,  454,  214,  570,  569,  472,  530,  432,  438,  151,
 /*   210 */   152,  404,  405,  421,   41,  213,  153,  533,  422,  496,
 /*   220 */   263,  568,  261,  427,  299,   60,   59,  304,  442,  443,
 /*   230 */   439,  439,   62,   62,   61,   61,   61,   61,  324,   63,
 /*   240 */    63,   63,   63,   64,   64,   65,   65,   65,   66,  212,
 /*   250 */   432,  438,  454,  340,  217,  429,  429,  429,  219,  550,
 /*   260 */   421,   41,  404,  405,  490,  567,  213,  299,   60,   59,
 /*   270 */   304,  442,  443,  439,  439,   62,   62,   61,   61,   61,
 /*   280 */    61,  652,   63,   63,   63,   63,   64,   64,   65,   65,
 /*   290 */    65,   66,  212,  432,  438,  103,  652,  549,  524,  519,
 /*   300 */   652,  216,  652,   67,  231,   69,  156,  534,   20,   66,
 /*   310 */   212,   60,   59,  304,  442,  443,  439,  439,   62,   62,
 /*   320 */    61,   61,   61,   61,  265,   63,   63,   63,   63,   64,
 /*   330 */    64,   65,   65,   65,   66,  212,  654,  324,  288,   77,
 /*   340 */   299,  456,  523,  170,  491,  155,  232,  380,  271,  270,
 /*   350 */   327,  654,  445,  445,  485,  654,  485,  654,  210,  421,
 /*   360 */    27,  456,  330,  170,  652,  391,  432,  438,  497,  425,
 /*   370 */   652,  652,  652,  652,  652,  652,  652,  252,  654,  422,
 /*   380 */   581,  291,   80,  652,   60,   59,  304,  442,  443,  439,
 /*   390 */   439,   62,   62,   61,   61,   61,   61,  210,   63,   63,
 /*   400 */    63,   63,   64,   64,   65,   65,   65,   66,  212,  299,
 /*   410 */   379,  585,  892,  494,  892,  306,  393,  368,  324,  654,
 /*   420 */    21,  324,  307,  324,  425,  654,  654,  654,  654,  654,
 /*   430 */   654,  654,  571,  654,  425,  432,  438,  532,  654,  654,
 /*   440 */   421,   49,  485,  421,   35,  421,   49,  329,  449,  450,
 /*   450 */   570,  582,  348,   60,   59,  304,  442,  443,  439,  439,
 /*   460 */    62,   62,   61,   61,   61,   61,  655,   63,   63,   63,
 /*   470 */    63,   64,   64,   65,   65,   65,   66,  212,  299,  420,
 /*   480 */   198,  655,  509,  419,  324,  655,  315,  655,  653,  425,
 /*   490 */   223,  316,  653,  525,  653,  238,  166,  118,  245,  350,
 /*   500 */   250,  351,  178,  314,  432,  438,  421,   34,  655,  254,
 /*   510 */   239,  213,  389,  213,  422,  653,  588,  398,  395,  406,
 /*   520 */   407,  408,   60,   59,  304,  442,  443,  439,  439,   62,
 /*   530 */    62,   61,   61,   61,   61,  335,   63,   63,   63,   63,
 /*   540 */    64,   64,   65,   65,   65,   66,  212,  299,  342,  655,
 /*   550 */   307,  257,  463,  547,  501,  655,  655,  655,  655,  655,
 /*   560 */   655,  655,  653,  655,  464,  653,  653,  653,  655,  655,
 /*   570 */   653,  161,  498,  432,  438,  653,  653,  465,    1,  502,
 /*   580 */   544,  418,  403,  585,  891,  176,  891,  343,  174,  503,
 /*   590 */   425,   60,   59,  304,  442,  443,  439,  439,   62,   62,
 /*   600 */    61,   61,   61,   61,  240,   63,   63,   63,   63,   64,
 /*   610 */    64,   65,   65,   65,   66,  212,  299,  381,  223,  422,
 /*   620 */     9,   93,  377,  582,  403,  118,  245,  350,  250,  351,
 /*   630 */   178,  177,  162,  325,  403,  183,  345,  254,  352,  355,
 /*   640 */   356,  227,  432,  438,  446,  320,  399,  404,  405,  357,
 /*   650 */   459,  209,  540,  367,  540,  425,  546,  302,  202,  299,
 /*   660 */    60,   59,  304,  442,  443,  439,  439,   62,   62,   61,
 /*   670 */    61,   61,   61,  402,   63,   63,   63,   63,   64,   64,
 /*   680 */    65,   65,   65,   66,  212,  432,  438,  225,  524,  404,
 /*   690 */   405,  489,  422,  397,   18,  824,    2,  578,   20,  404,
 /*   700 */   405,  194,  299,   60,   59,  304,  442,  443,  439,  439,
 /*   710 */    62,   62,   61,   61,   61,   61,  386,   63,   63,   63,
 /*   720 */    63,   64,   64,   65,   65,   65,   66,  212,  432,  438,
 /*   730 */   327,  370,  445,  445,  481,  422,  327,  373,  445,  445,
 /*   740 */   275,  519,  519,    8,  394,  299,   60,   70,  304,  442,
 /*   750 */   443,  439,  439,   62,   62,   61,   61,   61,   61,  378,
 /*   760 */    63,   63,   63,   63,   64,   64,   65,   65,   65,   66,
 /*   770 */   212,  432,  438,  243,  211,  167,  310,  224,  278,  196,