sql_lex.cc
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:22k
- /* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- /* A lexical scanner on a temporary buffer with a yacc interface */
- #include "mysql_priv.h"
- #include "item_create.h"
- #include <m_ctype.h>
- #include <hash.h>
- LEX_STRING tmp_table_alias= {(char*) "tmp-table",8};
- /* Macros to look like lex */
- #define yyGet() *(lex->ptr++)
- #define yyGetLast() lex->ptr[-1]
- #define yyPeek() lex->ptr[0]
- #define yyPeek2() lex->ptr[1]
- #define yyUnget() lex->ptr--
- #define yySkip() lex->ptr++
- #define yyLength() ((uint) (lex->ptr - lex->tok_start)-1)
- #if MYSQL_VERSION_ID < 32300
- #define FLOAT_NUM REAL_NUM
- #endif
- pthread_key(LEX*,THR_LEX);
- #define TOCK_NAME_LENGTH 24
- /*
- The following is based on the latin1 character set, and is only
- used when comparing keywords
- */
- uchar to_upper_lex[] = {
- 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
- 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
- 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
- 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
- 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
- 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
- 96, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
- 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90,123,124,125,126,127,
- 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
- 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
- 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,
- 176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,
- 192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
- 208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
- 192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
- 208,209,210,211,212,213,214,247,216,217,218,219,220,221,222,255
- };
- inline int lex_casecmp(const char *s, const char *t, uint len)
- {
- while (len-- != 0 &&
- to_upper_lex[(uchar) *s++] == to_upper_lex[(uchar) *t++]) ;
- return (int) len+1;
- }
- #include "lex_hash.h"
- static uchar state_map[256];
- void lex_init(void)
- {
- uint i;
- DBUG_ENTER("lex_init");
- for (i=0 ; i < array_elements(symbols) ; i++)
- symbols[i].length=(uchar) strlen(symbols[i].name);
- for (i=0 ; i < array_elements(sql_functions) ; i++)
- sql_functions[i].length=(uchar) strlen(sql_functions[i].name);
- VOID(pthread_key_create(&THR_LEX,NULL));
- /* Fill state_map with states to get a faster parser */
- for (i=0; i < 256 ; i++)
- {
- if (isalpha(i))
- state_map[i]=(uchar) STATE_IDENT;
- else if (isdigit(i))
- state_map[i]=(uchar) STATE_NUMBER_IDENT;
- #if defined(USE_MB) && defined(USE_MB_IDENT)
- else if (use_mb(default_charset_info) && my_ismbhead(default_charset_info, i))
- state_map[i]=(uchar) STATE_IDENT;
- #endif
- else if (!isgraph(i))
- state_map[i]=(uchar) STATE_SKIP;
- else
- state_map[i]=(uchar) STATE_CHAR;
- }
- state_map[(uchar)'_']=state_map[(uchar)'$']=(uchar) STATE_IDENT;
- state_map[(uchar)''']=state_map[(uchar)'"']=(uchar) STATE_STRING;
- state_map[(uchar)'-']=state_map[(uchar)'+']=(uchar) STATE_SIGNED_NUMBER;
- state_map[(uchar)'.']=(uchar) STATE_REAL_OR_POINT;
- state_map[(uchar)'>']=state_map[(uchar)'=']=state_map[(uchar)'!']= (uchar) STATE_CMP_OP;
- state_map[(uchar)'<']= (uchar) STATE_LONG_CMP_OP;
- state_map[(uchar)'&']=state_map[(uchar)'|']=(uchar) STATE_BOOL;
- state_map[(uchar)'#']=(uchar) STATE_COMMENT;
- state_map[(uchar)';']=(uchar) STATE_COLON;
- state_map[(uchar)':']=(uchar) STATE_SET_VAR;
- state_map[0]=(uchar) STATE_EOL;
- state_map[(uchar)'\']= (uchar) STATE_ESCAPE;
- state_map[(uchar)'/']= (uchar) STATE_LONG_COMMENT;
- state_map[(uchar)'*']= (uchar) STATE_END_LONG_COMMENT;
- state_map[(uchar)'@']= (uchar) STATE_USER_END;
- state_map[(uchar) '`']= (uchar) STATE_USER_VARIABLE_DELIMITER;
- if (thd_startup_options & OPTION_ANSI_MODE)
- {
- state_map[(uchar) '"'] = STATE_USER_VARIABLE_DELIMITER;
- }
- DBUG_VOID_RETURN;
- }
- void lex_free(void)
- { // Call this when daemon ends
- DBUG_ENTER("lex_free");
- DBUG_VOID_RETURN;
- }
- LEX *lex_start(THD *thd, uchar *buf,uint length)
- {
- LEX *lex= &thd->lex;
- lex->next_state=STATE_START;
- lex->end_of_query=(lex->ptr=buf)+length;
- lex->yylineno = 1;
- lex->create_refs=lex->in_comment=0;
- lex->length=0;
- lex->in_sum_expr=0;
- lex->expr_list.empty();
- lex->ftfunc_list.empty();
- lex->convert_set=(lex->thd=thd)->convert_set;
- lex->yacc_yyss=lex->yacc_yyvs=0;
- lex->ignore_space=test(thd->client_capabilities & CLIENT_IGNORE_SPACE);
- return lex;
- }
- void lex_end(LEX *lex)
- {
- lex->expr_list.delete_elements(); // If error when parsing sql-varargs
- x_free(lex->yacc_yyss);
- x_free(lex->yacc_yyvs);
- }
- static int find_keyword(LEX *lex, uint len, bool function)
- {
- uchar *tok=lex->tok_start;
- SYMBOL *symbol = get_hash_symbol((const char *)tok,len,function);
- if (symbol)
- {
- lex->yylval->symbol.symbol=symbol;
- lex->yylval->symbol.str= (char*) tok;
- lex->yylval->symbol.length=len;
- return symbol->tok;
- }
- #ifdef HAVE_DLOPEN
- udf_func *udf;
- if (function && using_udf_functions && (udf=find_udf((char*) tok, len)))
- {
- switch (udf->returns) {
- case STRING_RESULT:
- lex->yylval->udf=udf;
- return (udf->type == UDFTYPE_FUNCTION) ? UDF_CHAR_FUNC : UDA_CHAR_SUM;
- case REAL_RESULT:
- lex->yylval->udf=udf;
- return (udf->type == UDFTYPE_FUNCTION) ? UDF_FLOAT_FUNC : UDA_FLOAT_SUM;
- case INT_RESULT:
- lex->yylval->udf=udf;
- return (udf->type == UDFTYPE_FUNCTION) ? UDF_INT_FUNC : UDA_INT_SUM;
- }
- }
- #endif
- return 0;
- }
- /* make a copy of token before ptr and set yytoklen */
- static inline LEX_STRING get_token(LEX *lex,uint length)
- {
- LEX_STRING tmp;
- yyUnget(); // ptr points now after last token char
- tmp.length=lex->yytoklen=length;
- tmp.str=(char*) sql_strmake((char*) lex->tok_start,tmp.length);
- return tmp;
- }
- /* Return an unescaped text literal without quotes */
- /* Fix sometimes to do only one scan of the string */
- static char *get_text(LEX *lex)
- {
- reg1 uchar c,sep;
- uint found_escape=0;
- sep= yyGetLast(); // String should end with this
- //lex->tok_start=lex->ptr-1; // Remember '
- while (lex->ptr != lex->end_of_query)
- {
- c = yyGet();
- #ifdef USE_MB
- int l;
- if (use_mb(default_charset_info) &&
- (l = my_ismbchar(default_charset_info,
- (const char *)lex->ptr-1,
- (const char *)lex->end_of_query))) {
- lex->ptr += l-1;
- continue;
- }
- #endif
- if (c == '\')
- { // Escaped character
- found_escape=1;
- if (lex->ptr == lex->end_of_query)
- return 0;
- yySkip();
- }
- else if (c == sep)
- {
- if (c == yyGet()) // Check if two separators in a row
- {
- found_escape=1; // dupplicate. Remember for delete
- continue;
- }
- else
- yyUnget();
- /* Found end. Unescape and return string */
- uchar *str,*end,*start;
- str=lex->tok_start+1;
- end=lex->ptr-1;
- if (!(start=(uchar*) sql_alloc((uint) (end-str)+1)))
- return (char*) ""; // Sql_alloc has set error flag
- if (!found_escape)
- {
- lex->yytoklen=(uint) (end-str);
- memcpy(start,str,lex->yytoklen);
- start[lex->yytoklen]=0;
- }
- else
- {
- uchar *to;
- for (to=start ; str != end ; str++)
- {
- #ifdef USE_MB
- int l;
- if (use_mb(default_charset_info) &&
- (l = my_ismbchar(default_charset_info,
- (const char *)str, (const char *)end))) {
- while (l--)
- *to++ = *str++;
- str--;
- continue;
- }
- #endif
- if (*str == '\' && str+1 != end)
- {
- switch(*++str) {
- case 'n':
- *to++='n';
- break;
- case 't':
- *to++= 't';
- break;
- case 'r':
- *to++ = 'r';
- break;
- case 'b':
- *to++ = 'b';
- break;
- case '0':
- *to++= 0; // Ascii null
- break;
- case 'Z': // ^Z must be escaped on Win32
- *to++=' 32';
- break;
- case '_':
- case '%':
- *to++= '\'; // remember prefix for wildcard
- /* Fall through */
- default:
- *to++ = *str;
- break;
- }
- }
- else if (*str == sep)
- *to++= *str++; // Two ' or "
- else
- *to++ = *str;
- }
- *to=0;
- lex->yytoklen=(uint) (to-start);
- }
- if (lex->convert_set)
- lex->convert_set->convert((char*) start,lex->yytoklen);
- return (char*) start;
- }
- }
- return 0; // unexpected end of query
- }
- /*
- ** Calc type of integer; long integer, longlong integer or real.
- ** Returns smallest type that match the string.
- ** When using unsigned long long values the result is converted to a real
- ** because else they will be unexpected sign changes because all calculation
- ** is done with longlong or double.
- */
- static const char *long_str="2147483647";
- static const uint long_len=10;
- static const char *signed_long_str="-2147483648";
- static const char *longlong_str="9223372036854775807";
- static const uint longlong_len=19;
- static const char *signed_longlong_str="-9223372036854775808";
- static const uint signed_longlong_len=19;
- inline static uint int_token(const char *str,uint length)
- {
- if (length < long_len) // quick normal case
- return NUM;
- bool neg=0;
- if (*str == '+') // Remove sign and pre-zeros
- {
- str++; length--;
- }
- else if (*str == '-')
- {
- str++; length--;
- neg=1;
- }
- while (*str == '0' && length)
- {
- str++; length --;
- }
- if (length < long_len)
- return NUM;
- uint smaller,bigger;
- const char *cmp;
- if (neg)
- {
- if (length == long_len)
- {
- cmp= signed_long_str+1;
- smaller=NUM; // If <= signed_long_str
- bigger=LONG_NUM; // If >= signed_long_str
- }
- else if (length < signed_longlong_len)
- return LONG_NUM;
- else if (length > signed_longlong_len)
- return REAL_NUM;
- else
- {
- cmp=signed_longlong_str+1;
- smaller=LONG_NUM; // If <= signed_longlong_str
- bigger=REAL_NUM;
- }
- }
- else
- {
- if (length == long_len)
- {
- cmp= long_str;
- smaller=NUM;
- bigger=LONG_NUM;
- }
- else if (length < longlong_len)
- return LONG_NUM;
- else if (length > longlong_len)
- return REAL_NUM;
- else
- {
- cmp=longlong_str;
- smaller=LONG_NUM;
- bigger=REAL_NUM;
- }
- }
- while (*cmp && *cmp++ == *str++) ;
- return ((uchar) str[-1] <= (uchar) cmp[-1]) ? smaller : bigger;
- }
- // yylex remember the following states from the following yylex()
- // STATE_EOQ ; found end of query
- // STATE_OPERATOR_OR_IDENT ; last state was an ident, text or number
- // (which can't be followed by a signed number)
- int yylex(void *arg)
- {
- reg1 uchar c;
- int tokval;
- uint length;
- enum lex_states state,prev_state;
- LEX *lex=current_lex;
- YYSTYPE *yylval=(YYSTYPE*) arg;
- lex->yylval=yylval; // The global state
- lex->tok_start=lex->tok_end=lex->ptr;
- prev_state=state=lex->next_state;
- lex->next_state=STATE_OPERATOR_OR_IDENT;
- LINT_INIT(c);
- for (;;)
- {
- switch(state) {
- case STATE_OPERATOR_OR_IDENT: // Next is operator or keyword
- case STATE_START: // Start of token
- // Skipp startspace
- for (c=yyGet() ; (state_map[c] == STATE_SKIP) ; c= yyGet())
- {
- if (c == 'n')
- lex->yylineno++;
- }
- lex->tok_start=lex->ptr-1; // Start of real token
- state= (enum lex_states) state_map[c];
- break;
- case STATE_ESCAPE:
- if (yyGet() == 'N')
- { // Allow N as shortcut for NULL
- yylval->lex_str.str=(char*) "\N";
- yylval->lex_str.length=2;
- return NULL_SYM;
- }
- case STATE_CHAR: // Unknown or single char token
- case STATE_SKIP: // This should not happen
- yylval->lex_str.str=(char*) (lex->ptr=lex->tok_start);// Set to first char
- yylval->lex_str.length=1;
- c=yyGet();
- if (c != ')')
- lex->next_state= STATE_START; // Allow signed numbers
- if (c == ',')
- lex->tok_start=lex->ptr; // Let tok_start point at next item
- return((int) c);
- case STATE_IDENT: // Incomplete keyword or ident
- #if defined(USE_MB) && defined(USE_MB_IDENT)
- if (use_mb(default_charset_info))
- {
- if (my_ismbhead(default_charset_info, yyGetLast()))
- {
- int l = my_ismbchar(default_charset_info,
- (const char *)lex->ptr-1,
- (const char *)lex->end_of_query);
- if (l == 0) {
- state = STATE_CHAR;
- continue;
- }
- lex->ptr += l - 1;
- }
- while (state_map[c=yyGet()] == STATE_IDENT ||
- state_map[c] == STATE_NUMBER_IDENT)
- {
- if (my_ismbhead(default_charset_info, c))
- {
- int l;
- if ((l = my_ismbchar(default_charset_info,
- (const char *)lex->ptr-1,
- (const char *)lex->end_of_query)) == 0)
- break;
- lex->ptr += l-1;
- }
- }
- }
- else
- #endif
- while (state_map[c=yyGet()] == STATE_IDENT ||
- state_map[c] == STATE_NUMBER_IDENT) ;
- length= (uint) (lex->ptr - lex->tok_start)-1;
- if (lex->ignore_space)
- {
- for ( ; state_map[c] == STATE_SKIP ; c= yyGet());
- }
- if (c == '.' && (state_map[yyPeek()] == STATE_IDENT ||
- state_map[yyPeek()] == STATE_NUMBER_IDENT))
- lex->next_state=STATE_IDENT_SEP;
- else
- { // '(' must follow directly if function
- yyUnget();
- if ((tokval = find_keyword(lex,length,c == '(')))
- {
- lex->next_state= STATE_START; // Allow signed numbers
- return(tokval); // Was keyword
- }
- yySkip(); // next state does a unget
- }
- yylval->lex_str=get_token(lex,length);
- return(IDENT);
- case STATE_IDENT_SEP: // Found ident and now '.'
- lex->next_state=STATE_IDENT_START;// Next is an ident (not a keyword)
- yylval->lex_str.str=(char*) lex->ptr;
- yylval->lex_str.length=1;
- c=yyGet(); // should be '.'
- return((int) c);
- case STATE_NUMBER_IDENT: // number or ident which starts with num
- while (isdigit((c = yyGet()))) ;
- if (state_map[c] != STATE_IDENT)
- { // Can't be identifier
- state=STATE_INT_OR_REAL;
- break;
- }
- if (c == 'e' || c == 'E')
- {
- // The following test is written this way to allow numbers of type 1e1
- if (isdigit(yyPeek()) || (c=(yyGet())) == '+' || c == '-')
- { // Allow 1E+10
- if (isdigit(yyPeek())) // Number must have digit after sign
- {
- yySkip();
- while (isdigit(yyGet())) ;
- yylval->lex_str=get_token(lex,yyLength());
- return(FLOAT_NUM);
- }
- }
- yyUnget(); /* purecov: inspected */
- }
- else if (c == 'x' && (lex->ptr - lex->tok_start) == 2 &&
- lex->tok_start[0] == '0' )
- { // Varbinary
- while (isxdigit((c = yyGet()))) ;
- if ((lex->ptr - lex->tok_start) >= 4)
- {
- yylval->lex_str=get_token(lex,yyLength());
- yylval->lex_str.str+=2; // Skipp 0x
- yylval->lex_str.length-=2;
- lex->yytoklen-=2;
- return (HEX_NUM);
- }
- yyUnget();
- }
- // fall through
- case STATE_IDENT_START: // Incomplete ident
- #if defined(USE_MB) && defined(USE_MB_IDENT)
- if (use_mb(default_charset_info))
- {
- if (my_ismbhead(default_charset_info, yyGetLast()))
- {
- int l = my_ismbchar(default_charset_info,
- (const char *)lex->ptr-1,
- (const char *)lex->end_of_query);
- if (l == 0)
- {
- state = STATE_CHAR;
- continue;
- }
- lex->ptr += l - 1;
- }
- while (state_map[c=yyGet()] == STATE_IDENT ||
- state_map[c] == STATE_NUMBER_IDENT)
- {
- if (my_ismbhead(default_charset_info, c))
- {
- int l;
- if ((l = my_ismbchar(default_charset_info,
- (const char *)lex->ptr-1,
- (const char *)lex->end_of_query)) == 0)
- break;
- lex->ptr += l-1;
- }
- }
- }
- else
- #endif
- while (state_map[c = yyGet()] == STATE_IDENT ||
- state_map[c] == STATE_NUMBER_IDENT) ;
- if (c == '.' && (state_map[yyPeek()] == STATE_IDENT ||
- state_map[yyPeek()] == STATE_NUMBER_IDENT))
- lex->next_state=STATE_IDENT_SEP;// Next is '.'
- // fall through
- case STATE_FOUND_IDENT: // Complete ident
- yylval->lex_str=get_token(lex,yyLength());
- return(IDENT);
- case STATE_USER_VARIABLE_DELIMITER:
- lex->tok_start=lex->ptr; // Skipp first `
- while ((c=yyGet()) && state_map[c] != STATE_USER_VARIABLE_DELIMITER &&
- c != (uchar) NAMES_SEP_CHAR) ;
- yylval->lex_str=get_token(lex,yyLength());
- if (state_map[c] == STATE_USER_VARIABLE_DELIMITER)
- yySkip(); // Skipp end `
- return(IDENT);
- case STATE_SIGNED_NUMBER: // Incomplete signed number
- if (prev_state == STATE_OPERATOR_OR_IDENT)
- {
- if (c == '-' && yyPeek() == '-' && isspace(yyPeek2()))
- state=STATE_COMMENT;
- else
- state= STATE_CHAR; // Must be operator
- break;
- }
- if (!isdigit(c=yyGet()) || yyPeek() == 'x')
- {
- if (c != '.')
- {
- if (c == '-' && isspace(yyPeek()))
- state=STATE_COMMENT;
- else
- state = STATE_CHAR; // Return sign as single char
- break;
- }
- yyUnget(); // Fix for next loop
- }
- while (isdigit(c=yyGet())) ; // Incomplete real or int number
- if ((c == 'e' || c == 'E') &&
- (yyPeek() == '+' || yyPeek() == '-' || isdigit(yyPeek())))
- { // Real number
- yyUnget();
- c= '.'; // Fool next test
- }
- // fall through
- case STATE_INT_OR_REAL: // Compleat int or incompleat real
- if (c != '.')
- { // Found complete integer number.
- yylval->lex_str=get_token(lex,yyLength());
- return int_token(yylval->lex_str.str,yylval->lex_str.length);
- }
- // fall through
- case STATE_REAL: // Incomplete real number
- while (isdigit(c = yyGet())) ;
- if (c == 'e' || c == 'E')
- {
- c = yyGet();
- if (c != '-' && c != '+' && !isdigit(c))
- { // No exp sig found
- state= STATE_CHAR;
- break;
- }
- if (!isdigit(yyGet()))
- { // No digit after sign
- state= STATE_CHAR;
- break;
- }
- while (isdigit(yyGet())) ;
- yylval->lex_str=get_token(lex,yyLength());
- return(FLOAT_NUM);
- }
- yylval->lex_str=get_token(lex,yyLength());
- return(REAL_NUM);
- case STATE_CMP_OP: // Incomplete comparison operator
- if (state_map[yyPeek()] == STATE_CMP_OP ||
- state_map[yyPeek()] == STATE_LONG_CMP_OP)
- yySkip();
- if ((tokval = find_keyword(lex,(uint) (lex->ptr - lex->tok_start),0)))
- {
- lex->next_state= STATE_START; // Allow signed numbers
- return(tokval);
- }
- state = STATE_CHAR; // Something fishy found
- break;
- case STATE_LONG_CMP_OP: // Incomplete comparison operator
- if (state_map[yyPeek()] == STATE_CMP_OP ||
- state_map[yyPeek()] == STATE_LONG_CMP_OP)
- {
- yySkip();
- if (state_map[yyPeek()] == STATE_CMP_OP)
- yySkip();
- }
- if ((tokval = find_keyword(lex,(uint) (lex->ptr - lex->tok_start),0)))
- {
- lex->next_state= STATE_START; // Found long op
- return(tokval);
- }
- state = STATE_CHAR; // Something fishy found
- break;
- case STATE_BOOL:
- if (c != yyPeek())
- {
- state=STATE_CHAR;
- break;
- }
- yySkip();
- tokval = find_keyword(lex,2,0); // Is a bool operator
- lex->next_state= STATE_START; // Allow signed numbers
- return(tokval);
- case STATE_STRING: // Incomplete text string
- if (!(yylval->lex_str.str = get_text(lex)))
- {
- state= STATE_CHAR; // Read char by char
- break;
- }
- yylval->lex_str.length=lex->yytoklen;
- return(TEXT_STRING);
- case STATE_COMMENT: // Comment
- while ((c = yyGet()) != 'n' && c) ;
- yyUnget(); // Safety against eof
- state = STATE_START; // Try again
- break;
- case STATE_LONG_COMMENT: /* Long C comment? */
- if (yyPeek() != '*')
- {
- state=STATE_CHAR; // Probable division
- break;
- }
- yySkip(); // Skip '*'
- if (yyPeek() == '!') // MySQL command in comment
- {
- ulong version=MYSQL_VERSION_ID;
- yySkip();
- state=STATE_START;
- if (isdigit(yyPeek()))
- { // Version number
- version=strtol((char*) lex->ptr,(char**) &lex->ptr,10);
- }
- if (version <= MYSQL_VERSION_ID)
- {
- lex->in_comment=1;
- break;
- }
- }
- while (lex->ptr != lex->end_of_query &&
- ((c=yyGet()) != '*' || yyPeek() != '/'))
- {
- if (c == 'n')
- lex->yylineno++;
- }
- if (lex->ptr != lex->end_of_query)
- yySkip(); // remove last '/'
- state = STATE_START; // Try again
- break;
- case STATE_END_LONG_COMMENT:
- if (lex->in_comment && yyPeek() == '/')
- {
- yySkip();
- lex->in_comment=0;
- state=STATE_START;
- }
- else
- state=STATE_CHAR; // Return '*'
- break;
- case STATE_SET_VAR: // Check if ':='
- if (yyPeek() != '=')
- {
- state=STATE_CHAR; // Return ':'
- break;
- }
- yySkip();
- return (SET_VAR);
- case STATE_COLON: // optional line terminator
- if (yyPeek())
- {
- state=STATE_CHAR; // Return ';'
- break;
- }
- /* fall true */
- case STATE_EOL:
- lex->next_state=STATE_END; // Mark for next loop
- return(END_OF_INPUT);
- case STATE_END:
- lex->next_state=STATE_END;
- return(0); // We found end of input last time
- // Actually real shouldn't start
- // with . but allow them anyhow
- case STATE_REAL_OR_POINT:
- if (isdigit(yyPeek()))
- state = STATE_REAL; // Real
- else
- {
- state = STATE_CHAR; // return '.'
- lex->next_state=STATE_IDENT_START;// Next is an ident (not a keyword)
- }
- break;
- case STATE_USER_END: // end '@' of user@hostname
- if (state_map[yyPeek()] != STATE_STRING &&
- state_map[yyPeek()] != STATE_USER_VARIABLE_DELIMITER)
- lex->next_state=STATE_HOSTNAME; // Mark for next loop
- yylval->lex_str.str=(char*) lex->ptr;
- yylval->lex_str.length=1;
- return((int) '@');
- case STATE_HOSTNAME: // end '@' of user@hostname
- for (c=yyGet() ;
- isalnum(c) || c == '.' || c == '_' || c == '$';
- c= yyGet()) ;
- yylval->lex_str=get_token(lex,yyLength());
- return(LEX_HOSTNAME);
- }
- }
- }