| /* 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> |
| %% |
| /* 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. |
| ** ParseTOKENTYPE 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 ParseTOKENTYPE. 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() |
| ** ParseARG_SDECL A static variable declaration for the %extra_argument |
| ** ParseARG_PDECL A parameter declaration for the %extra_argument |
| ** ParseARG_STORE Code to store %extra_argument into yypParser |
| ** ParseARG_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 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. */ |
| static const YYMINORTYPE yyzerominor = { 0 }; |
| |
| /* Define the yytestcase() macro to be a no-op if is not already defined |
| ** otherwise. |
| ** |
| ** Applications can choose to define yytestcase() in the %include section |
| ** to a macro that can assist in verifying code coverage. For production |
| ** code the yytestcase() macro should be turned off. But it is useful |
| ** for testing. |
| */ |
| #ifndef yytestcase |
| # define yytestcase(X) |
| #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. |
| */ |
| %% |
| |
| /* The next table maps tokens into fallback tokens. If a construct |
| ** like the following: |
| ** |
| ** %fallback ID X Y Z. |
| ** |
| ** appears in the grammar, then ID becomes a fallback token for X, Y, |
| ** and Z. Whenever one of the tokens X, Y, or Z is input to the parser |
| ** but it does not parse, the type of the token is changed to ID and |
| ** the parse is retried before an error is thrown. |
| */ |
| #ifdef YYFALLBACK |
| static const YYCODETYPE yyFallback[] = { |
| %% |
| }; |
| #endif /* YYFALLBACK */ |
| |
| /* The following structure represents a single element of the |
| ** parser's stack. Information stored includes: |
| ** |
| ** + The state number for the parser at this level of the stack. |
| ** |
| ** + The value of the token stored at this level of the stack. |
| ** (In other words, the "major" token.) |
| ** |
| ** + The semantic value stored at this level of the stack. This is |
| ** the information used by the action routines in the grammar. |
| ** It is sometimes called the "minor" token. |
| */ |
| struct yyStackEntry { |
| YYACTIONTYPE stateno; /* The state-number */ |
| YYCODETYPE major; /* The major token value. This is the code |
| ** number for the token at this stack level */ |
| YYMINORTYPE minor; /* The user-supplied minor token value. This |
| ** is the value of the token */ |
| }; |
| typedef struct yyStackEntry yyStackEntry; |
| |
| /* The state of the parser is completely contained in an instance of |
| ** the following structure */ |
| struct yyParser { |
| int yyidx; /* Index of top element in stack */ |
| #ifdef YYTRACKMAXSTACKDEPTH |
| int yyidxMax; /* Maximum value of yyidx */ |
| #endif |
| int yyerrcnt; /* Shifts left before out of the error */ |
| ParseARG_SDECL /* A place to hold %extra_argument */ |
| #if YYSTACKDEPTH<=0 |
| int yystksz; /* Current side of the stack */ |
| yyStackEntry *yystack; /* The parser's stack */ |
| #else |
| yyStackEntry yystack[YYSTACKDEPTH]; /* The parser's stack */ |
| #endif |
| }; |
| typedef struct yyParser yyParser; |
| |
| #ifndef NDEBUG |
| #include <stdio.h> |
| static FILE *yyTraceFILE = 0; |
| static char *yyTracePrompt = 0; |
| #endif /* NDEBUG */ |
| |
| #ifndef NDEBUG |
| /* |
| ** Turn parser tracing on by giving a stream to which to write the trace |
| ** and a prompt to preface each trace message. Tracing is turned off |
| ** by making either argument NULL |
| ** |
| ** Inputs: |
| ** <ul> |
| ** <li> A FILE* to which trace output should be written. |
| ** If NULL, then tracing is turned off. |
| ** <li> A prefix string written at the beginning of every |
| ** line of trace output. If NULL, then tracing is |
| ** turned off. |
| ** </ul> |
| ** |
| ** Outputs: |
| ** None. |
| */ |
| void ParseTrace(FILE *TraceFILE, char *zTracePrompt){ |
| yyTraceFILE = TraceFILE; |
| yyTracePrompt = zTracePrompt; |
| if( yyTraceFILE==0 ) yyTracePrompt = 0; |
| else if( yyTracePrompt==0 ) yyTraceFILE = 0; |
| } |
| #endif /* NDEBUG */ |
| |
| #ifndef NDEBUG |
| /* For tracing shifts, the names of all terminals and nonterminals |
| ** are required. The following table supplies these names */ |
| static const char *const yyTokenName[] = { |
| %% |
| }; |
| #endif /* NDEBUG */ |
| |
| #ifndef NDEBUG |
| /* For tracing reduce actions, the names of all rules are required. |
| */ |
| static const char *const yyRuleName[] = { |
| %% |
| }; |
| #endif /* NDEBUG */ |
| |
| |
| #if YYSTACKDEPTH<=0 |
| /* |
| ** Try to increase the size of the parser stack. |
| */ |
| static void yyGrowStack(yyParser *p){ |
| int newSize; |
| yyStackEntry *pNew; |
| |
| newSize = p->yystksz*2 + 100; |
| pNew = realloc(p->yystack, newSize*sizeof(pNew[0])); |
| if( pNew ){ |
| p->yystack = pNew; |
| p->yystksz = newSize; |
| #ifndef NDEBUG |
| if( yyTraceFILE ){ |
| fprintf(yyTraceFILE,"%sStack grows to %d entries!\n", |
| yyTracePrompt, p->yystksz); |
| } |
| #endif |
| } |
| } |
| #endif |
| |
| /* |
| ** This function allocates a new parser. |
| ** The only argument is a pointer to a function which works like |
| ** malloc. |
| ** |
| ** Inputs: |
| ** A pointer to the function used to allocate memory. |
| ** |
| ** Outputs: |
| ** A pointer to a parser. This pointer is used in subsequent calls |
| ** to Parse and ParseFree. |
| */ |
| void *ParseAlloc(void *(*mallocProc)(size_t)){ |
| yyParser *pParser; |
| pParser = (yyParser*)(*mallocProc)( (size_t)sizeof(yyParser) ); |
| if( pParser ){ |
| pParser->yyidx = -1; |
| #ifdef YYTRACKMAXSTACKDEPTH |
| pParser->yyidxMax = 0; |
| #endif |
| #if YYSTACKDEPTH<=0 |
| pParser->yystack = NULL; |
| pParser->yystksz = 0; |
| yyGrowStack(pParser); |
| #endif |
| } |
| return pParser; |
| } |
| |
| /* The following function deletes the value associated with a |
| ** symbol. The symbol can be either a terminal or nonterminal. |
| ** "yymajor" is the symbol code, and "yypminor" is a pointer to |
| ** the value. |
| */ |
| static void yy_destructor( |
| yyParser *yypParser, /* The parser */ |
| YYCODETYPE yymajor, /* Type code for object to destroy */ |
| YYMINORTYPE *yypminor /* The object to be destroyed */ |
| ){ |
| ParseARG_FETCH; |
| switch( yymajor ){ |
| /* Here is inserted the actions which take place when a |
| ** terminal or non-terminal is destroyed. This can happen |
| ** when the symbol is popped from the stack during a |
| ** reduce or during error processing or when a parser is |
| ** being destroyed before it is finished parsing. |
| ** |
| ** Note: during a reduce, the only symbols destroyed are those |
| ** which appear on the RHS of the rule, but which are not used |
| ** inside the C code. |
| */ |
| %% |
| default: break; /* If no destructor action specified: do nothing */ |
| } |
| } |
| |
| /* |
| ** Pop the parser's stack once. |
| ** |
| ** If there is a destructor routine associated with the token which |
| ** is popped from the stack, then call it. |
| ** |
| ** Return the major token number for the symbol popped. |
| */ |
| static int yy_pop_parser_stack(yyParser *pParser){ |
| YYCODETYPE yymajor; |
| yyStackEntry *yytos = &pParser->yystack[pParser->yyidx]; |
| |
| if( pParser->yyidx<0 ) return 0; |
| #ifndef NDEBUG |
| if( yyTraceFILE && pParser->yyidx>=0 ){ |
| fprintf(yyTraceFILE,"%sPopping %s\n", |
| yyTracePrompt, |
| yyTokenName[yytos->major]); |
| } |
| #endif |
| yymajor = yytos->major; |
| yy_destructor(pParser, yymajor, &yytos->minor); |
| pParser->yyidx--; |
| return yymajor; |
| } |
| |
| /* |
| ** Deallocate and destroy a parser. Destructors are all called for |
| ** all stack elements before shutting the parser down. |
| ** |
| ** Inputs: |
| ** <ul> |
| ** <li> A pointer to the parser. This should be a pointer |
| ** obtained from ParseAlloc. |
| ** <li> A pointer to a function used to reclaim memory obtained |
| ** from malloc. |
| ** </ul> |
| */ |
| void ParseFree( |
| void *p, /* The parser to be deleted */ |
| void (*freeProc)(void*) /* Function used to reclaim memory */ |
| ){ |
| yyParser *pParser = (yyParser*)p; |
| if( pParser==0 ) return; |
| while( pParser->yyidx>=0 ) yy_pop_parser_stack(pParser); |
| #if YYSTACKDEPTH<=0 |
| free(pParser->yystack); |
| #endif |
| (*freeProc)((void*)pParser); |
| } |
| |
| /* |
| ** Return the peak depth of the stack for a parser. |
| */ |
| #ifdef YYTRACKMAXSTACKDEPTH |
| int ParseStackPeak(void *p){ |
| yyParser *pParser = (yyParser*)p; |
| return pParser->yyidxMax; |
| } |
| #endif |
| |
| /* |
| ** Find the appropriate action for a parser given the terminal |
| ** look-ahead token iLookAhead. |
| ** |
| ** If the look-ahead token is YYNOCODE, then check to see if the action is |
| ** independent of the look-ahead. If it is, return the action, otherwise |
| ** return YY_NO_ACTION. |
| */ |
| static int yy_find_shift_action( |
| yyParser *pParser, /* The parser */ |
| YYCODETYPE iLookAhead /* The look-ahead token */ |
| ){ |
| int i; |
| int stateno = pParser->yystack[pParser->yyidx].stateno; |
| |
| if( stateno>YY_SHIFT_COUNT |
| || (i = yy_shift_ofst[stateno])==YY_SHIFT_USE_DFLT ){ |
| return yy_default[stateno]; |
| } |
| assert( iLookAhead!=YYNOCODE ); |
| i += iLookAhead; |
| if( i<0 || i>=YY_ACTTAB_COUNT || yy_lookahead[i]!=iLookAhead ){ |
| if( iLookAhead>0 ){ |
| #ifdef YYFALLBACK |
| YYCODETYPE iFallback; /* Fallback token */ |
| if( iLookAhead<sizeof(yyFallback)/sizeof(yyFallback[0]) |
| && (iFallback = yyFallback[iLookAhead])!=0 ){ |
| #ifndef NDEBUG |
| if( yyTraceFILE ){ |
| fprintf(yyTraceFILE, "%sFALLBACK %s => %s\n", |
| yyTracePrompt, yyTokenName[iLookAhead], yyTokenName[iFallback]); |
| } |
| #endif |
| return yy_find_shift_action(pParser, iFallback); |
| } |
| #endif |
| #ifdef YYWILDCARD |
| { |
| int j = i - iLookAhead + YYWILDCARD; |
| if( |
| #if YY_SHIFT_MIN+YYWILDCARD<0 |
| j>=0 && |
| #endif |
| #if YY_SHIFT_MAX+YYWILDCARD>=YY_ACTTAB_COUNT |
| j<YY_ACTTAB_COUNT && |
| #endif |
| yy_lookahead[j]==YYWILDCARD |
| ){ |
| #ifndef NDEBUG |
| if( yyTraceFILE ){ |
| fprintf(yyTraceFILE, "%sWILDCARD %s => %s\n", |
| yyTracePrompt, yyTokenName[iLookAhead], yyTokenName[YYWILDCARD]); |
| } |
| #endif /* NDEBUG */ |
| return yy_action[j]; |
| } |
| } |
| #endif /* YYWILDCARD */ |
| } |
| return yy_default[stateno]; |
| }else{ |
| return yy_action[i]; |
| } |
| } |
| |
| /* |
| ** Find the appropriate action for a parser given the non-terminal |
| ** look-ahead token iLookAhead. |
| ** |
| ** If the look-ahead token is YYNOCODE, then check to see if the action is |
| ** independent of the look-ahead. If it is, return the action, otherwise |
| ** return YY_NO_ACTION. |
| */ |
| static int yy_find_reduce_action( |
| int stateno, /* Current state number */ |
| YYCODETYPE iLookAhead /* The look-ahead token */ |
| ){ |
| int i; |
| #ifdef YYERRORSYMBOL |
| if( stateno>YY_REDUCE_COUNT ){ |
| return yy_default[stateno]; |
| } |
| #else |
| assert( stateno<=YY_REDUCE_COUNT ); |
| #endif |
| i = yy_reduce_ofst[stateno]; |
| assert( i!=YY_REDUCE_USE_DFLT ); |
| assert( iLookAhead!=YYNOCODE ); |
| i += iLookAhead; |
| #ifdef YYERRORSYMBOL |
| if( i<0 || i>=YY_ACTTAB_COUNT || yy_lookahead[i]!=iLookAhead ){ |
| return yy_default[stateno]; |
| } |
| #else |
| assert( i>=0 && i<YY_ACTTAB_COUNT ); |
| assert( yy_lookahead[i]==iLookAhead ); |
| #endif |
| return yy_action[i]; |
| } |
| |
| /* |
| ** The following routine is called if the stack overflows. |
| */ |
| static void yyStackOverflow(yyParser *yypParser, YYMINORTYPE *yypMinor){ |
| ParseARG_FETCH; |
| yypParser->yyidx--; |
| #ifndef NDEBUG |
| if( yyTraceFILE ){ |
| fprintf(yyTraceFILE,"%sStack Overflow!\n",yyTracePrompt); |
| } |
| #endif |
| while( yypParser->yyidx>=0 ) yy_pop_parser_stack(yypParser); |
| /* Here code is inserted which will execute if the parser |
| ** stack every overflows */ |
| %% |
| ParseARG_STORE; /* Suppress warning about unused %extra_argument var */ |
| } |
| |
| /* |
| ** Perform a shift action. |
| */ |
| static void yy_shift( |
| yyParser *yypParser, /* The parser to be shifted */ |
| int yyNewState, /* The new state to shift in */ |
| int yyMajor, /* The major token to shift in */ |
| YYMINORTYPE *yypMinor /* Pointer to the minor token to shift in */ |
| ){ |
| yyStackEntry *yytos; |
| yypParser->yyidx++; |
| #ifdef YYTRACKMAXSTACKDEPTH |
| if( yypParser->yyidx>yypParser->yyidxMax ){ |
| yypParser->yyidxMax = yypParser->yyidx; |
| } |
| #endif |
| #if YYSTACKDEPTH>0 |
| if( yypParser->yyidx>=YYSTACKDEPTH ){ |
| yyStackOverflow(yypParser, yypMinor); |
| return; |
| } |
| #else |
| if( yypParser->yyidx>=yypParser->yystksz ){ |
| yyGrowStack(yypParser); |
| if( yypParser->yyidx>=yypParser->yystksz ){ |
| yyStackOverflow(yypParser, yypMinor); |
| return; |
| } |
| } |
| #endif |
| yytos = &yypParser->yystack[yypParser->yyidx]; |
| yytos->stateno = (YYACTIONTYPE)yyNewState; |
| yytos->major = (YYCODETYPE)yyMajor; |
| yytos->minor = *yypMinor; |
| #ifndef NDEBUG |
| if( yyTraceFILE && yypParser->yyidx>0 ){ |
| int i; |
| fprintf(yyTraceFILE,"%sShift %d\n",yyTracePrompt,yyNewState); |
| fprintf(yyTraceFILE,"%sStack:",yyTracePrompt); |
| for(i=1; i<=yypParser->yyidx; i++) |
| fprintf(yyTraceFILE," %s",yyTokenName[yypParser->yystack[i].major]); |
| fprintf(yyTraceFILE,"\n"); |
| } |
| #endif |
| } |
| |
| /* The following table contains information about every rule that |
| ** is used during the reduce. |
| */ |
| static const struct { |
| YYCODETYPE lhs; /* Symbol on the left-hand side of the rule */ |
| unsigned char nrhs; /* Number of right-hand side symbols in the rule */ |
| } yyRuleInfo[] = { |
| %% |
| }; |
| |
| static void yy_accept(yyParser*); /* Forward Declaration */ |
| |
| /* |
| ** Perform a reduce action and the shift that must immediately |
| ** follow the reduce. |
| */ |
| static void yy_reduce( |
| yyParser *yypParser, /* The parser */ |
| int yyruleno /* Number of the rule by which to reduce */ |
| ){ |
| int yygoto; /* The next state */ |
| int yyact; /* The next action */ |
| YYMINORTYPE yygotominor; /* The LHS of the rule reduced */ |
| yyStackEntry *yymsp; /* The top of the parser's stack */ |
| int yysize; /* Amount to pop the stack */ |
| ParseARG_FETCH; |
| yymsp = &yypParser->yystack[yypParser->yyidx]; |
| #ifndef NDEBUG |
| if( yyTraceFILE && yyruleno>=0 |
| && yyruleno<(int)(sizeof(yyRuleName)/sizeof(yyRuleName[0])) ){ |
| fprintf(yyTraceFILE, "%sReduce [%s].\n", yyTracePrompt, |
| yyRuleName[yyruleno]); |
| } |
| #endif /* NDEBUG */ |
| |
| /* Silence complaints from purify about yygotominor being uninitialized |
| ** in some cases when it is copied into the stack after the following |
| ** switch. yygotominor is uninitialized when a rule reduces that does |
| ** not set the value of its left-hand side nonterminal. Leaving the |
| ** value of the nonterminal uninitialized is utterly harmless as long |
| ** as the value is never used. So really the only thing this code |
| ** accomplishes is to quieten purify. |
| ** |
| ** 2007-01-16: The wireshark project (www.wireshark.org) reports that |
| ** without this code, their parser segfaults. I'm not sure what there |
| ** parser is doing to make this happen. This is the second bug report |
| ** from wireshark this week. Clearly they are stressing Lemon in ways |
| ** that it has not been previously stressed... (SQLite ticket #2172) |
| */ |
| /*memset(&yygotominor, 0, sizeof(yygotominor));*/ |
| yygotominor = yyzerominor; |
| |
| |
| switch( yyruleno ){ |
| /* Beginning here are the reduction cases. A typical example |
| ** follows: |
| ** case 0: |
| ** #line <lineno> <grammarfile> |
| ** { ... } // User supplied code |
| ** #line <lineno> <thisfile> |
| ** break; |
| */ |
| %% |
| }; |
| yygoto = yyRuleInfo[yyruleno].lhs; |
| yysize = yyRuleInfo[yyruleno].nrhs; |
| yypParser->yyidx -= yysize; |
| yyact = yy_find_reduce_action(yymsp[-yysize].stateno,(YYCODETYPE)yygoto); |
| if( yyact < YYNSTATE ){ |
| #ifdef NDEBUG |
| /* If we are not debugging and the reduce action popped at least |
| ** one element off the stack, then we can push the new element back |
| ** onto the stack here, and skip the stack overflow test in yy_shift(). |
| ** That gives a significant speed improvement. */ |
| if( yysize ){ |
| yypParser->yyidx++; |
| yymsp -= yysize-1; |
| yymsp->stateno = (YYACTIONTYPE)yyact; |
| yymsp->major = (YYCODETYPE)yygoto; |
| yymsp->minor = yygotominor; |
| }else |
| #endif |
| { |
| yy_shift(yypParser,yyact,yygoto,&yygotominor); |
| } |
| }else{ |
| assert( yyact == YYNSTATE + YYNRULE + 1 ); |
| yy_accept(yypParser); |
| } |
| } |
| |
| /* |
| ** The following code executes when the parse fails |
| */ |
| #ifndef YYNOERRORRECOVERY |
| static void yy_parse_failed( |
| yyParser *yypParser /* The parser */ |
| ){ |
| ParseARG_FETCH; |
| #ifndef NDEBUG |
| if( yyTraceFILE ){ |
| fprintf(yyTraceFILE,"%sFail!\n",yyTracePrompt); |
| } |
| #endif |
| while( yypParser->yyidx>=0 ) yy_pop_parser_stack(yypParser); |
| /* Here code is inserted which will be executed whenever the |
| ** parser fails */ |
| %% |
| ParseARG_STORE; /* Suppress warning about unused %extra_argument variable */ |
| } |
| #endif /* YYNOERRORRECOVERY */ |
| |
| /* |
| ** The following code executes when a syntax error first occurs. |
| */ |
| static void yy_syntax_error( |
| yyParser *yypParser, /* The parser */ |
| int yymajor, /* The major type of the error token */ |
| YYMINORTYPE yyminor /* The minor type of the error token */ |
| ){ |
| ParseARG_FETCH; |
| #define TOKEN (yyminor.yy0) |
| %% |
| ParseARG_STORE; /* Suppress warning about unused %extra_argument variable */ |
| } |
| |
| /* |
| ** The following is executed when the parser accepts |
| */ |
| static void yy_accept( |
| yyParser *yypParser /* The parser */ |
| ){ |
| ParseARG_FETCH; |
| #ifndef NDEBUG |
| if( yyTraceFILE ){ |
| fprintf(yyTraceFILE,"%sAccept!\n",yyTracePrompt); |
| } |
| #endif |
| while( yypParser->yyidx>=0 ) yy_pop_parser_stack(yypParser); |
| /* Here code is inserted which will be executed whenever the |
| ** parser accepts */ |
| %% |
| ParseARG_STORE; /* Suppress warning about unused %extra_argument variable */ |
| } |
| |
| /* The main parser program. |
| ** The first argument is a pointer to a structure obtained from |
| ** "ParseAlloc" which describes the current state of the parser. |
| ** The second argument is the major token number. The third is |
| ** the minor token. The fourth optional argument is whatever the |
| ** user wants (and specified in the grammar) and is available for |
| ** use by the action routines. |
| ** |
| ** Inputs: |
| ** <ul> |
| ** <li> A pointer to the parser (an opaque structure.) |
| ** <li> The major token number. |
| ** <li> The minor token number. |
| ** <li> An option argument of a grammar-specified type. |
| ** </ul> |
| ** |
| ** Outputs: |
| ** None. |
| */ |
| void Parse( |
| void *yyp, /* The parser */ |
| int yymajor, /* The major token code number */ |
| ParseTOKENTYPE yyminor /* The value for the token */ |
| ParseARG_PDECL /* Optional %extra_argument parameter */ |
| ){ |
| YYMINORTYPE yyminorunion; |
| int yyact; /* The parser action. */ |
| int yyendofinput; /* True if we are at the end of input */ |
| #ifdef YYERRORSYMBOL |
| int yyerrorhit = 0; /* True if yymajor has invoked an error */ |
| #endif |
| yyParser *yypParser; /* The parser */ |
| |
| /* (re)initialize the parser, if necessary */ |
| yypParser = (yyParser*)yyp; |
| if( yypParser->yyidx<0 ){ |
| #if YYSTACKDEPTH<=0 |
| if( yypParser->yystksz <=0 ){ |
| /*memset(&yyminorunion, 0, sizeof(yyminorunion));*/ |
| yyminorunion = yyzerominor; |
| yyStackOverflow(yypParser, &yyminorunion); |
| return; |
| } |
| #endif |
| yypParser->yyidx = 0; |
| yypParser->yyerrcnt = -1; |
| yypParser->yystack[0].stateno = 0; |
| yypParser->yystack[0].major = 0; |
| } |
| yyminorunion.yy0 = yyminor; |
| yyendofinput = (yymajor==0); |
| ParseARG_STORE; |
| |
| #ifndef NDEBUG |
| if( yyTraceFILE ){ |
| fprintf(yyTraceFILE,"%sInput %s\n",yyTracePrompt,yyTokenName[yymajor]); |
| } |
| #endif |
| |
| do{ |
| yyact = yy_find_shift_action(yypParser,(YYCODETYPE)yymajor); |
| if( yyact<YYNSTATE ){ |
| assert( !yyendofinput ); /* Impossible to shift the $ token */ |
| yy_shift(yypParser,yyact,yymajor,&yyminorunion); |
| yypParser->yyerrcnt--; |
| yymajor = YYNOCODE; |
| }else if( yyact < YYNSTATE + YYNRULE ){ |
| yy_reduce(yypParser,yyact-YYNSTATE); |
| }else{ |
| assert( yyact == YY_ERROR_ACTION ); |
| #ifdef YYERRORSYMBOL |
| int yymx; |
| #endif |
| #ifndef NDEBUG |
| if( yyTraceFILE ){ |
| fprintf(yyTraceFILE,"%sSyntax Error!\n",yyTracePrompt); |
| } |
| #endif |
| #ifdef YYERRORSYMBOL |
| /* A syntax error has occurred. |
| ** The response to an error depends upon whether or not the |
| ** grammar defines an error token "ERROR". |
| ** |
| ** This is what we do if the grammar does define ERROR: |
| ** |
| ** * Call the %syntax_error function. |
| ** |
| ** * Begin popping the stack until we enter a state where |
| ** it is legal to shift the error symbol, then shift |
| ** the error symbol. |
| ** |
| ** * Set the error count to three. |
| ** |
| ** * Begin accepting and shifting new tokens. No new error |
| ** processing will occur until three tokens have been |
| ** shifted successfully. |
| ** |
| */ |
| if( yypParser->yyerrcnt<0 ){ |
| yy_syntax_error(yypParser,yymajor,yyminorunion); |
| } |
| yymx = yypParser->yystack[yypParser->yyidx].major; |
| if( yymx==YYERRORSYMBOL || yyerrorhit ){ |
| #ifndef NDEBUG |
| if( yyTraceFILE ){ |
| fprintf(yyTraceFILE,"%sDiscard input token %s\n", |
| yyTracePrompt,yyTokenName[yymajor]); |
| } |
| #endif |
| yy_destructor(yypParser, (YYCODETYPE)yymajor,&yyminorunion); |
| yymajor = YYNOCODE; |
| }else{ |
| while( |
| yypParser->yyidx >= 0 && |
| yymx != YYERRORSYMBOL && |
| (yyact = yy_find_reduce_action( |
| yypParser->yystack[yypParser->yyidx].stateno, |
| YYERRORSYMBOL)) >= YYNSTATE |
| ){ |
| yy_pop_parser_stack(yypParser); |
| } |
| if( yypParser->yyidx < 0 || yymajor==0 ){ |
| yy_destructor(yypParser,(YYCODETYPE)yymajor,&yyminorunion); |
| yy_parse_failed(yypParser); |
| yymajor = YYNOCODE; |
| }else if( yymx!=YYERRORSYMBOL ){ |
| YYMINORTYPE u2; |
| u2.YYERRSYMDT = 0; |
| yy_shift(yypParser,yyact,YYERRORSYMBOL,&u2); |
| } |
| } |
| yypParser->yyerrcnt = 3; |
| yyerrorhit = 1; |
| #elif defined(YYNOERRORRECOVERY) |
| /* If the YYNOERRORRECOVERY macro is defined, then do not attempt to |
| ** do any kind of error recovery. Instead, simply invoke the syntax |
| ** error routine and continue going as if nothing had happened. |
| ** |
| ** Applications can set this macro (for example inside %include) if |
| ** they intend to abandon the parse upon the first syntax error seen. |
| */ |
| yy_syntax_error(yypParser,yymajor,yyminorunion); |
| yy_destructor(yypParser,(YYCODETYPE)yymajor,&yyminorunion); |
| yymajor = YYNOCODE; |
| |
| #else /* YYERRORSYMBOL is not defined */ |
| /* This is what we do if the grammar does not define ERROR: |
| ** |
| ** * Report an error message, and throw away the input token. |
| ** |
| ** * If the input token is $, then fail the parse. |
| ** |
| ** As before, subsequent error messages are suppressed until |
| ** three input tokens have been successfully shifted. |
| */ |
| if( yypParser->yyerrcnt<=0 ){ |
| yy_syntax_error(yypParser,yymajor,yyminorunion); |
| } |
| yypParser->yyerrcnt = 3; |
| yy_destructor(yypParser,(YYCODETYPE)yymajor,&yyminorunion); |
| if( yyendofinput ){ |
| yy_parse_failed(yypParser); |
| } |
| yymajor = YYNOCODE; |
| #endif |
| } |
| }while( yymajor!=YYNOCODE && yypParser->yyidx>=0 ); |
| return; |
| } |