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Overview
| Comment: | Changes to help the tokenizer run about 33% faster. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
a050e6f096d40aa5b6275797b96e62c2 |
| User & Date: | drh 2016-02-08 19:36:46 |
Context
|
2016-02-08
| ||
| 19:40 | Disable the two-argument form of the fts3_tokenizer() SQL function unless the library is built with -DSQLITE_ENABLE_FTS3_TOKENIZER. check-in: e0eb217a user: dan tags: trunk | |
| 19:36 | Changes to help the tokenizer run about 33% faster. check-in: a050e6f0 user: drh tags: trunk | |
| 19:15 | Add code to get the tokenizer character-class logic working for EBCDIC. Closed-Leaf check-in: 04f7da77 user: drh tags: tokenizer-char-class | |
|
2016-02-07
| ||
| 20:39 | Fix harmless compiler warning in 'srcck1' tool and add it to the clean targets. check-in: 852a529a user: mistachkin tags: trunk | |
Changes
Changes to src/tokenize.c.
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** This file contains C code that splits an SQL input string up into ** individual tokens and sends those tokens one-by-one over to the ** parser for analysis. */ #include "sqliteInt.h" #include <stdlib.h> /* ** The charMap() macro maps alphabetic characters into their ** lower-case ASCII equivalent. On ASCII machines, this is just ** an upper-to-lower case map. On EBCDIC machines we also need ** to adjust the encoding. Only alphabetic characters and underscores ** need to be translated. */ #ifdef SQLITE_ASCII # define charMap(X) sqlite3UpperToLower[(unsigned char)X] #endif #ifdef SQLITE_EBCDIC # define charMap(X) ebcdicToAscii[(unsigned char)X] const unsigned char ebcdicToAscii[] = { ................................................................................ /* ** The sqlite3KeywordCode function looks up an identifier to determine if ** it is a keyword. If it is a keyword, the token code of that keyword is ** returned. If the input is not a keyword, TK_ID is returned. ** ** The implementation of this routine was generated by a program, ** mkkeywordhash.h, located in the tool subdirectory of the distribution. ** The output of the mkkeywordhash.c program is written into a file ** named keywordhash.h and then included into this source file by ** the #include below. */ #include "keywordhash.h" ................................................................................ /* Make the IdChar function accessible from ctime.c */ #ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS int sqlite3IsIdChar(u8 c){ return IdChar(c); } #endif /* ** Return the length of the token that begins at z[0]. ** Store the token type in *tokenType before returning. */ int sqlite3GetToken(const unsigned char *z, int *tokenType){ int i, c; switch( *z ){ case ' ': case '\t': case '\n': case '\f': case '\r': { testcase( z[0]==' ' ); testcase( z[0]=='\t' ); testcase( z[0]=='\n' ); testcase( z[0]=='\f' ); testcase( z[0]=='\r' ); for(i=1; sqlite3Isspace(z[i]); i++){} *tokenType = TK_SPACE; return i; } case '-': { if( z[1]=='-' ){ for(i=2; (c=z[i])!=0 && c!='\n'; i++){} *tokenType = TK_SPACE; /* IMP: R-22934-25134 */ return i; } *tokenType = TK_MINUS; return 1; } case '(': { *tokenType = TK_LP; return 1; } case ')': { *tokenType = TK_RP; return 1; } case ';': { *tokenType = TK_SEMI; return 1; } case '+': { *tokenType = TK_PLUS; return 1; } case '*': { *tokenType = TK_STAR; return 1; } case '/': { if( z[1]!='*' || z[2]==0 ){ *tokenType = TK_SLASH; return 1; } for(i=3, c=z[2]; (c!='*' || z[i]!='/') && (c=z[i])!=0; i++){} if( c ) i++; *tokenType = TK_SPACE; /* IMP: R-22934-25134 */ return i; } case '%': { *tokenType = TK_REM; return 1; } case '=': { *tokenType = TK_EQ; return 1 + (z[1]=='='); } case '<': { if( (c=z[1])=='=' ){ *tokenType = TK_LE; return 2; }else if( c=='>' ){ *tokenType = TK_NE; return 2; }else if( c=='<' ){ ................................................................................ *tokenType = TK_LSHIFT; return 2; }else{ *tokenType = TK_LT; return 1; } } case '>': { if( (c=z[1])=='=' ){ *tokenType = TK_GE; return 2; }else if( c=='>' ){ *tokenType = TK_RSHIFT; return 2; }else{ *tokenType = TK_GT; return 1; } } case '!': { if( z[1]!='=' ){ *tokenType = TK_ILLEGAL; return 2; }else{ *tokenType = TK_NE; return 2; } } case '|': { if( z[1]!='|' ){ *tokenType = TK_BITOR; return 1; }else{ *tokenType = TK_CONCAT; return 2; } } case ',': { *tokenType = TK_COMMA; return 1; } case '&': { *tokenType = TK_BITAND; return 1; } case '~': { *tokenType = TK_BITNOT; return 1; } case '`': case '\'': case '"': { int delim = z[0]; testcase( delim=='`' ); testcase( delim=='\'' ); testcase( delim=='"' ); for(i=1; (c=z[i])!=0; i++){ if( c==delim ){ if( z[i+1]==delim ){ ................................................................................ *tokenType = TK_ID; return i+1; }else{ *tokenType = TK_ILLEGAL; return i; } } case '.': { #ifndef SQLITE_OMIT_FLOATING_POINT if( !sqlite3Isdigit(z[1]) ) #endif { *tokenType = TK_DOT; return 1; } /* If the next character is a digit, this is a floating point ** number that begins with ".". Fall thru into the next case */ } case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': { testcase( z[0]=='0' ); testcase( z[0]=='1' ); testcase( z[0]=='2' ); testcase( z[0]=='3' ); testcase( z[0]=='4' ); testcase( z[0]=='5' ); testcase( z[0]=='6' ); testcase( z[0]=='7' ); testcase( z[0]=='8' ); testcase( z[0]=='9' ); *tokenType = TK_INTEGER; #ifndef SQLITE_OMIT_HEX_INTEGER if( z[0]=='0' && (z[1]=='x' || z[1]=='X') && sqlite3Isxdigit(z[2]) ){ ................................................................................ #endif while( IdChar(z[i]) ){ *tokenType = TK_ILLEGAL; i++; } return i; } case '[': { for(i=1, c=z[0]; c!=']' && (c=z[i])!=0; i++){} *tokenType = c==']' ? TK_ID : TK_ILLEGAL; return i; } case '?': { *tokenType = TK_VARIABLE; for(i=1; sqlite3Isdigit(z[i]); i++){} return i; } #ifndef SQLITE_OMIT_TCL_VARIABLE case '$': #endif case '@': /* For compatibility with MS SQL Server */ case '#': case ':': { int n = 0; testcase( z[0]=='$' ); testcase( z[0]=='@' ); testcase( z[0]==':' ); testcase( z[0]=='#' ); *tokenType = TK_VARIABLE; for(i=1; (c=z[i])!=0; i++){ if( IdChar(c) ){ n++; ................................................................................ }else{ break; } } if( n==0 ) *tokenType = TK_ILLEGAL; return i; } #ifndef SQLITE_OMIT_BLOB_LITERAL case 'x': case 'X': { testcase( z[0]=='x' ); testcase( z[0]=='X' ); if( z[1]=='\'' ){ *tokenType = TK_BLOB; for(i=2; sqlite3Isxdigit(z[i]); i++){} if( z[i]!='\'' || i%2 ){ *tokenType = TK_ILLEGAL; while( z[i] && z[i]!='\'' ){ i++; } } if( z[i] ) i++; return i; } /* Otherwise fall through to the next case */ } #endif default: { if( !IdChar(*z) ){ break; } for(i=1; IdChar(z[i]); i++){} *tokenType = TK_ID; return keywordCode((char*)z, i, tokenType); } } *tokenType = TK_ILLEGAL; return 1; } /* ** Run the parser on the given SQL string. The parser structure is ** passed in. An SQLITE_ status code is returned. If an error occurs ** then an and attempt is made to write an error message into ** memory obtained from sqlite3_malloc() and to make *pzErrMsg point to that |
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** This file contains C code that splits an SQL input string up into ** individual tokens and sends those tokens one-by-one over to the ** parser for analysis. */ #include "sqliteInt.h" #include <stdlib.h> /* Character classes for tokenizing ** ** In the sqlite3GetToken() function, a switch() on aiClass[c] is implemented ** using a lookup table, whereas a switch() directly on c uses a binary search. ** The lookup table is much faster. To maximize speed, and to ensure that ** a lookup table is used, all of the classes need to be small integers and ** all of them need to be used within the switch. */ #define CC_X 0 /* The letter 'x', or start of BLOB literal */ #define CC_KYWD 1 /* Alphabetics or '_'. Usable in a keyword */ #define CC_ID 2 /* unicode characters usable in IDs */ #define CC_DIGIT 3 /* Digits */ #define CC_DOLLAR 4 /* '$' */ #define CC_VARALPHA 5 /* '@', '#', ':'. Alphabetic SQL variables */ #define CC_VARNUM 6 /* '?'. Numeric SQL variables */ #define CC_SPACE 7 /* Space characters */ #define CC_QUOTE 8 /* '"', '\'', or '`'. String literals, quoted ids */ #define CC_QUOTE2 9 /* '['. [...] style quoted ids */ #define CC_PIPE 10 /* '|'. Bitwise OR or concatenate */ #define CC_MINUS 11 /* '-'. Minus or SQL-style comment */ #define CC_LT 12 /* '<'. Part of < or <= or <> */ #define CC_GT 13 /* '>'. Part of > or >= */ #define CC_EQ 14 /* '='. Part of = or == */ #define CC_BANG 15 /* '!'. Part of != */ #define CC_SLASH 16 /* '/'. / or c-style comment */ #define CC_LP 17 /* '(' */ #define CC_RP 18 /* ')' */ #define CC_SEMI 19 /* ';' */ #define CC_PLUS 20 /* '+' */ #define CC_STAR 21 /* '*' */ #define CC_PERCENT 22 /* '%' */ #define CC_COMMA 23 /* ',' */ #define CC_AND 24 /* '&' */ #define CC_TILDA 25 /* '~' */ #define CC_DOT 26 /* '.' */ #define CC_ILLEGAL 27 /* Illegal character */ static const unsigned char aiClass[] = { #ifdef SQLITE_ASCII /* x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xa xb xc xd xe xf */ /* 0x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 7, 7, 27, 7, 7, 27, 27, /* 1x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, /* 2x */ 7, 15, 8, 5, 4, 22, 24, 8, 17, 18, 21, 20, 23, 11, 26, 16, /* 3x */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 5, 19, 12, 14, 13, 6, /* 4x */ 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 5x */ 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 9, 27, 27, 27, 1, /* 6x */ 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 7x */ 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 27, 10, 27, 25, 27, /* 8x */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 9x */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* Ax */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* Bx */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* Cx */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* Dx */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* Ex */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* Fx */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 #endif #ifdef SQLITE_EBCDIC /* x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xa xb xc xd xe xf */ /* 0x */ 27, 27, 27, 27, 27, 7, 27, 27, 27, 27, 27, 27, 7, 7, 27, 27, /* 1x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, /* 2x */ 27, 27, 27, 27, 27, 7, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, /* 3x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, /* 4x */ 7, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 12, 17, 20, 10, /* 5x */ 24, 27, 27, 27, 27, 27, 27, 27, 27, 27, 15, 4, 21, 18, 19, 27, /* 6x */ 11, 16, 27, 27, 27, 27, 27, 27, 27, 27, 27, 23, 22, 1, 13, 7, /* 7x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 8, 5, 5, 5, 8, 14, 8, /* 8x */ 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 27, 27, 27, 27, 27, 27, /* 9x */ 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 27, 27, 27, 27, 27, 27, /* 9x */ 25, 1, 1, 1, 1, 1, 1, 0, 1, 1, 27, 27, 27, 27, 27, 27, /* Bx */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 9, 27, 27, 27, 27, 27, /* Cx */ 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 27, 27, 27, 27, 27, 27, /* Dx */ 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 27, 27, 27, 27, 27, 27, /* Ex */ 27, 27, 1, 1, 1, 1, 1, 0, 1, 1, 27, 27, 27, 27, 27, 27, /* Fx */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 27, 27, 27, 27, 27, 27, #endif }; /* ** The charMap() macro maps alphabetic characters (only) into their ** lower-case ASCII equivalent. On ASCII machines, this is just ** an upper-to-lower case map. On EBCDIC machines we also need ** to adjust the encoding. The mapping is only valid for alphabetics ** which are the only characters for which this feature is used. ** ** Used by keywordhash.h */ #ifdef SQLITE_ASCII # define charMap(X) sqlite3UpperToLower[(unsigned char)X] #endif #ifdef SQLITE_EBCDIC # define charMap(X) ebcdicToAscii[(unsigned char)X] const unsigned char ebcdicToAscii[] = { ................................................................................ /* ** The sqlite3KeywordCode function looks up an identifier to determine if ** it is a keyword. If it is a keyword, the token code of that keyword is ** returned. If the input is not a keyword, TK_ID is returned. ** ** The implementation of this routine was generated by a program, ** mkkeywordhash.c, located in the tool subdirectory of the distribution. ** The output of the mkkeywordhash.c program is written into a file ** named keywordhash.h and then included into this source file by ** the #include below. */ #include "keywordhash.h" ................................................................................ /* Make the IdChar function accessible from ctime.c */ #ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS int sqlite3IsIdChar(u8 c){ return IdChar(c); } #endif /* ** Return the length (in bytes) of the token that begins at z[0]. ** Store the token type in *tokenType before returning. */ int sqlite3GetToken(const unsigned char *z, int *tokenType){ int i, c; switch( aiClass[*z] ){ /* Switch on the character-class of the first byte ** of the token. See the comment on the CC_ defines ** above. */ case CC_SPACE: { testcase( z[0]==' ' ); testcase( z[0]=='\t' ); testcase( z[0]=='\n' ); testcase( z[0]=='\f' ); testcase( z[0]=='\r' ); for(i=1; sqlite3Isspace(z[i]); i++){} *tokenType = TK_SPACE; return i; } case CC_MINUS: { if( z[1]=='-' ){ for(i=2; (c=z[i])!=0 && c!='\n'; i++){} *tokenType = TK_SPACE; /* IMP: R-22934-25134 */ return i; } *tokenType = TK_MINUS; return 1; } case CC_LP: { *tokenType = TK_LP; return 1; } case CC_RP: { *tokenType = TK_RP; return 1; } case CC_SEMI: { *tokenType = TK_SEMI; return 1; } case CC_PLUS: { *tokenType = TK_PLUS; return 1; } case CC_STAR: { *tokenType = TK_STAR; return 1; } case CC_SLASH: { if( z[1]!='*' || z[2]==0 ){ *tokenType = TK_SLASH; return 1; } for(i=3, c=z[2]; (c!='*' || z[i]!='/') && (c=z[i])!=0; i++){} if( c ) i++; *tokenType = TK_SPACE; /* IMP: R-22934-25134 */ return i; } case CC_PERCENT: { *tokenType = TK_REM; return 1; } case CC_EQ: { *tokenType = TK_EQ; return 1 + (z[1]=='='); } case CC_LT: { if( (c=z[1])=='=' ){ *tokenType = TK_LE; return 2; }else if( c=='>' ){ *tokenType = TK_NE; return 2; }else if( c=='<' ){ ................................................................................ *tokenType = TK_LSHIFT; return 2; }else{ *tokenType = TK_LT; return 1; } } case CC_GT: { if( (c=z[1])=='=' ){ *tokenType = TK_GE; return 2; }else if( c=='>' ){ *tokenType = TK_RSHIFT; return 2; }else{ *tokenType = TK_GT; return 1; } } case CC_BANG: { if( z[1]!='=' ){ *tokenType = TK_ILLEGAL; return 2; }else{ *tokenType = TK_NE; return 2; } } case CC_PIPE: { if( z[1]!='|' ){ *tokenType = TK_BITOR; return 1; }else{ *tokenType = TK_CONCAT; return 2; } } case CC_COMMA: { *tokenType = TK_COMMA; return 1; } case CC_AND: { *tokenType = TK_BITAND; return 1; } case CC_TILDA: { *tokenType = TK_BITNOT; return 1; } case CC_QUOTE: { int delim = z[0]; testcase( delim=='`' ); testcase( delim=='\'' ); testcase( delim=='"' ); for(i=1; (c=z[i])!=0; i++){ if( c==delim ){ if( z[i+1]==delim ){ ................................................................................ *tokenType = TK_ID; return i+1; }else{ *tokenType = TK_ILLEGAL; return i; } } case CC_DOT: { #ifndef SQLITE_OMIT_FLOATING_POINT if( !sqlite3Isdigit(z[1]) ) #endif { *tokenType = TK_DOT; return 1; } /* If the next character is a digit, this is a floating point ** number that begins with ".". Fall thru into the next case */ } case CC_DIGIT: { testcase( z[0]=='0' ); testcase( z[0]=='1' ); testcase( z[0]=='2' ); testcase( z[0]=='3' ); testcase( z[0]=='4' ); testcase( z[0]=='5' ); testcase( z[0]=='6' ); testcase( z[0]=='7' ); testcase( z[0]=='8' ); testcase( z[0]=='9' ); *tokenType = TK_INTEGER; #ifndef SQLITE_OMIT_HEX_INTEGER if( z[0]=='0' && (z[1]=='x' || z[1]=='X') && sqlite3Isxdigit(z[2]) ){ ................................................................................ #endif while( IdChar(z[i]) ){ *tokenType = TK_ILLEGAL; i++; } return i; } case CC_QUOTE2: { for(i=1, c=z[0]; c!=']' && (c=z[i])!=0; i++){} *tokenType = c==']' ? TK_ID : TK_ILLEGAL; return i; } case CC_VARNUM: { *tokenType = TK_VARIABLE; for(i=1; sqlite3Isdigit(z[i]); i++){} return i; } case CC_DOLLAR: case CC_VARALPHA: { int n = 0; testcase( z[0]=='$' ); testcase( z[0]=='@' ); testcase( z[0]==':' ); testcase( z[0]=='#' ); *tokenType = TK_VARIABLE; for(i=1; (c=z[i])!=0; i++){ if( IdChar(c) ){ n++; ................................................................................ }else{ break; } } if( n==0 ) *tokenType = TK_ILLEGAL; return i; } case CC_KYWD: { for(i=1; aiClass[z[i]]<=CC_KYWD; i++){} if( IdChar(z[i]) ){ /* This token started out using characters that can appear in keywords, ** but z[i] is a character not allowed within keywords, so this must ** be an identifier instead */ i++; break; } *tokenType = TK_ID; return keywordCode((char*)z, i, tokenType); } #ifndef SQLITE_OMIT_BLOB_LITERAL case CC_X: { testcase( z[0]=='x' ); testcase( z[0]=='X' ); if( z[1]=='\'' ){ *tokenType = TK_BLOB; for(i=2; sqlite3Isxdigit(z[i]); i++){} if( z[i]!='\'' || i%2 ){ *tokenType = TK_ILLEGAL; while( z[i] && z[i]!='\'' ){ i++; } } if( z[i] ) i++; return i; } /* If it is not a BLOB literal, then it must be an ID, since no ** SQL keywords start with the letter 'x'. Fall through */ } #endif case CC_ID: { i = 1; break; } default: { *tokenType = TK_ILLEGAL; return 1; } } while( IdChar(z[i]) ){ i++; } *tokenType = TK_ID; return i; } /* ** Run the parser on the given SQL string. The parser structure is ** passed in. An SQLITE_ status code is returned. If an error occurs ** then an and attempt is made to write an error message into ** memory obtained from sqlite3_malloc() and to make *pzErrMsg point to that |
Changes to tool/mkkeywordhash.c.
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{ "WHEN", "TK_WHEN", ALWAYS },
{ "WHERE", "TK_WHERE", ALWAYS },
};
/* Number of keywords */
static int nKeyword = (sizeof(aKeywordTable)/sizeof(aKeywordTable[0]));
/* Map all alphabetic characters into the same case */
#define charMap(X) (0x20|(X))
/*
** Comparision function for two Keyword records
*/
static int keywordCompare1(const void *a, const void *b){
const Keyword *pA = (Keyword*)a;
................................................................................
if( j>=5 ){
printf("\n");
j = 0;
}
}
printf("%s };\n", j==0 ? "" : "\n");
printf(" int h, i;\n");
printf(" if( n>=2 ){\n");
printf(" h = ((charMap(z[0])*4) ^ (charMap(z[n-1])*3) ^ n) %% %d;\n",
bestSize);
printf(" for(i=((int)aHash[h])-1; i>=0; i=((int)aNext[i])-1){\n");
printf(" if( aLen[i]==n &&"
" sqlite3StrNICmp(&zText[aOffset[i]],z,n)==0 ){\n");
for(i=0; i<nKeyword; i++){
printf(" testcase( i==%d ); /* %s */\n",
i, aKeywordTable[i].zOrigName);
}
printf(" *pType = aCode[i];\n");
printf(" break;\n");
printf(" }\n");
printf(" }\n");
printf(" }\n");
printf(" return n;\n");
printf("}\n");
printf("int sqlite3KeywordCode(const unsigned char *z, int n){\n");
printf(" int id = TK_ID;\n");
printf(" keywordCode((char*)z, n, &id);\n");
printf(" return id;\n");
printf("}\n");
printf("#define SQLITE_N_KEYWORD %d\n", nKeyword);
return 0;
}
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{ "WHEN", "TK_WHEN", ALWAYS },
{ "WHERE", "TK_WHERE", ALWAYS },
};
/* Number of keywords */
static int nKeyword = (sizeof(aKeywordTable)/sizeof(aKeywordTable[0]));
/* Map all alphabetic characters into lower-case for hashing. This is
** only valid for alphabetics. In particular it does not work for '_'
** and so the hash cannot be on a keyword position that might be an '_'.
*/
#define charMap(X) (0x20|(X))
/*
** Comparision function for two Keyword records
*/
static int keywordCompare1(const void *a, const void *b){
const Keyword *pA = (Keyword*)a;
................................................................................
if( j>=5 ){
printf("\n");
j = 0;
}
}
printf("%s };\n", j==0 ? "" : "\n");
printf(" int i, j;\n");
printf(" const char *zKW;\n");
printf(" if( n>=2 ){\n");
printf(" i = ((charMap(z[0])*4) ^ (charMap(z[n-1])*3) ^ n) %% %d;\n",
bestSize);
printf(" for(i=((int)aHash[i])-1; i>=0; i=((int)aNext[i])-1){\n");
printf(" if( aLen[i]!=n ) continue;\n");
printf(" j = 0;\n");
printf(" zKW = &zText[aOffset[i]];\n");
printf("#ifdef SQLITE_ASCII\n");
printf(" while( j<n && (z[j]&~0x20)==zKW[j] ){ j++; }\n");
printf("#endif\n");
printf("#ifdef SQLITE_EBCDIC\n");
printf(" while( j<n && toupper(z[j])==zKW[j] ){ j++; }\n");
printf("#endif\n");
printf(" if( j<n ) continue;\n");
for(i=0; i<nKeyword; i++){
printf(" testcase( i==%d ); /* %s */\n",
i, aKeywordTable[i].zOrigName);
}
printf(" *pType = aCode[i];\n");
printf(" break;\n");
printf(" }\n");
printf(" }\n");
printf(" return n;\n");
printf("}\n");
printf("int sqlite3KeywordCode(const unsigned char *z, int n){\n");
printf(" int id = TK_ID;\n");
printf(" keywordCode((char*)z, n, &id);\n");
printf(" return id;\n");
printf("}\n");
printf("#define SQLITE_N_KEYWORD %d\n", nKeyword);
return 0;
}
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