parse.c

sqlite的最新源码 This ZIP archive contains preprocessed C code for the SQLite library as individual sour

/* Driver template for the LEMON parser generator.
** The author disclaims copyright to this source code.
*/
/* First off, code is included that follows the "include" declaration
** in the input grammar file. */
#include <stdio.h>
#line 51 "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 48 "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 249
#define YYACTIONTYPE unsigned short int
#define YYWILDCARD 59
#define sqlite3ParserTOKENTYPE Token
typedef union {
  sqlite3ParserTOKENTYPE yy0;
  Select* yy43;
  TriggerStep* yy75;
  struct LimitVal yy84;
  struct LikeOp yy86;
  struct {int value; int mask;} yy207;
  ExprList* yy242;
  int yy316;
  IdList* yy352;
  struct TrigEvent yy354;
  SrcList* yy419;
  Expr* yy450;
} 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 598
#define YYNRULE 315
#define YYFALLBACK 1
#define YY_NO_ACTION      (YYNSTATE+YYNRULE+2)
#define YY_ACCEPT_ACTION  (YYNSTATE+YYNRULE+1)
#define YY_ERROR_ACTION   (YYNSTATE+YYNRULE)

/* The yyzerominor constant is used to initialize instances of
** YYMINORTYPE objects to zero. */
#ifdef __cplusplus
static YYMINORTYPE yyzerominor;
#else
static const YYMINORTYPE yyzerominor;
#endif

/* Next are the 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 */   296,  914,  120,  597,    2,  172,  425,  425,   62,   62,
 /*    10 */    62,   62,  210,   64,   64,   64,   64,   65,   65,   66,
 /*    20 */    66,   66,   67,  212,  398,  395,  432,  438,   69,   64,
 /*    30 */    64,   64,   64,   65,   65,   66,   66,   66,   67,  212,
 /*    40 */   458,  456,  327,  168,   61,   60,  301,  442,  443,  439,
 /*    50 */   439,   63,   63,   62,   62,   62,   62,  256,   64,   64,
 /*    60 */    64,   64,   65,   65,   66,   66,   66,   67,  212,  296,
 /*    70 */   498,  425,  425,  212,  427,   83,   68,  469,   70,  154,
 /*    80 */    64,   64,   64,   64,   65,   65,   66,   66,   66,   67,
 /*    90 */   212,   68,  307,   70,  154,  432,  438,  454,  214,   59,
 /*   100 */    65,   65,   66,   66,   66,   67,  212,  429,  429,  429,
 /*   110 */   497,  583,  296,   61,   60,  301,  442,  443,  439,  439,
 /*   120 */    63,   63,   62,   62,   62,   62,  321,   64,   64,   64,
 /*   130 */    64,   65,   65,   66,   66,   66,   67,  212,  432,  438,
 /*   140 */    95,   66,   66,   66,   67,  212,  403,  256,  421,   35,
 /*   150 */    57,   67,  212,  175,  417,  499,   61,   60,  301,  442,
 /*   160 */   443,  439,  439,   63,   63,   62,   62,   62,   62,   19,
 /*   170 */    64,   64,   64,   64,   65,   65,   66,   66,   66,   67,
 /*   180 */   212,  296,  225,  532,  299,  581,  109,  422,  242,  458,
 /*   190 */   416,  335,  414,   21,  502,  503,  346,  403,  527,  176,
 /*   200 */   160,  454,  214,  580,  579,  344,  500,  432,  438,  149,
 /*   210 */   150,  404,  405,  539,  514,  418,  151,  541,    8,  498,
 /*   220 */   538,  577,  578,  427,  296,   61,   60,  301,  442,  443,
 /*   230 */   439,  439,   63,   63,   62,   62,   62,   62,  196,   64,
 /*   240 */    64,   64,   64,   65,   65,   66,   66,   66,   67,  212,
 /*   250 */   432,  438,  454,  598,  398,  395,  429,  429,  429,  369,
 /*   260 */   558,  481,  404,  405,  372,  576,  213,  296,   61,   60,
 /*   270 */   301,  442,  443,  439,  439,   63,   63,   62,   62,   62,
 /*   280 */    62,  321,   64,   64,   64,   64,   65,   65,   66,   66,
 /*   290 */    66,   67,  212,  432,  438,  555,  503,  304,  557,  532,
 /*   300 */   218,  557,  552,  421,   36,  234,  397,    2,  542,   21,
 /*   310 */   540,   61,   60,  301,  442,  443,  439,  439,   63,   63,
 /*   320 */    62,   62,   62,   62,  388,   64,   64,   64,   64,   65,
 /*   330 */    65,   66,   66,   66,   67,  212,  415,  530,   85,  381,
 /*   340 */    78,  323,  296,  210,  304,  527,  493,  492,  379,  274,
 /*   350 */   273,  379,  274,  273,  347,  463,  241,  387,  268,  210,
 /*   360 */   533,  581,  210,  403,   20,  224,  144,  464,  432,  438,
 /*   370 */   485,  164,  114,  248,  349,  253,  350,  177,  554,  580,
 /*   380 */   465,  420,  331,   81,  257,  419,   61,   60,  301,  442,
 /*   390 */   443,  439,  439,   63,   63,   62,   62,   62,   62,  391,
 /*   400 */    64,   64,   64,   64,   65,   65,   66,   66,   66,   67,
 /*   410 */   212,  296,  224,  203,  249,  496,  403,  440,  837,  114,
 /*   420 */   248,  349,  253,  350,  177,  250,  321,  152,  404,  405,
 /*   430 */   321,  257,  303,  324,  155,  445,  445,  432,  438,  317,
 /*   440 */   400,  389,  213,   68,  209,   70,  154,  422,  421,   35,
 /*   450 */   393,  202,  421,   42,  481,   61,   60,  301,  442,  443,
 /*   460 */   439,  439,   63,   63,   62,   62,   62,   62,  422,   64,
 /*   470 */    64,   64,   64,   65,   65,   66,   66,   66,   67,  212,
 /*   480 */   296,  404,  405,  183,  513,  422,  351,  354,  355,  403,
 /*   490 */    77,  335,   79,  489,  216,  183,  334,  356,  351,  354,
 /*   500 */   355,  433,  434,  406,  407,  408,  432,  438,  235,  356,
 /*   510 */   386,   68,  291,   70,  154,  456,  531,  168,  198,  302,
 /*   520 */   449,  450,  436,  437,   61,   60,  301,  442,  443,  439,
 /*   530 */   439,   63,   63,   62,   62,   62,   62,  394,   64,   64,
 /*   540 */    64,   64,   65,   65,   66,   66,   66,   67,  212,  296,
 /*   550 */   321,  435,  422,  260,  404,  405,  321,  183,  153,  321,
 /*   560 */   351,  354,  355,  446,  332,  321,  595,  905,  321,  905,
 /*   570 */     1,  356,  421,   28,  403,  432,  438,  376,  421,   42,
 /*   580 */   477,  421,   35,  213,  548,  366,  548,  421,   50,  159,
 /*   590 */   421,   50,  422,   61,   60,  301,  442,  443,  439,  439,
 /*   600 */    63,   63,   62,   62,   62,   62,  592,   64,   64,   64,
 /*   610 */    64,   65,   65,   66,   66,   66,   67,  212,  296,  337,
 /*   620 */   217,  463,  256,   94,  339,  326,  449,  450,  172,  340,
 /*   630 */   425,  345,  532,  464,  312,  595,  904,  313,  904,  404,
 /*   640 */   405,  588,   21,  226,  432,  438,  465,  243,  504,  324,
 /*   650 */   322,  445,  445,  421,    3,  459,  230,  308,  505,  194,
 /*   660 */   278,  296,   61,   60,  301,  442,  443,  439,  439,   63,
 /*   670 */    63,   62,   62,   62,   62,  592,   64,   64,   64,   64,
 /*   680 */    65,   65,   66,   66,   66,   67,  212,  432,  438,  213,
 /*   690 */   179,  180,  181,  422,  324,  425,  445,  445,  281,  262,
 /*   700 */   279,  402,  194,  481,  296,   61,   60,  301,  442,  443,
 /*   710 */   439,  439,   63,   63,   62,   62,   62,   62,  377,   64,
 /*   720 */    64,   64,   64,   65,   65,   66,   66,   66,   67,  212,
 /*   730 */   432,  438,  591,  295,  115,  268,  422,  266,  211,  264,
 /*   740 */   373,  324,  246,  445,  445,   56,  256,  296,   61,   71,
 /*   750 */   301,  442,  443,  439,  439,   63,   63,   62,   62,   62,
 /*   760 */    62,  377,   64,   64,   64,   64,   65,   65,   66,   66,
 /*   770 */    66,   67,  212,  432,  438,  550,  269,  474,   18,  549,
 /*   780 */   280,  309,  343,  380,  171,  160,  256,  268,    5,  268,
 /*   790 */   296,  368,   60,  301,  442,  443,  439,  439,   63,   63,