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/*
Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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; version 2 of the License.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "sql_chars.h"
#include "m_ctype.h"
#include "my_sys.h"
static
void hint_lex_init_maps(charset_info_st *cs,
enum hint_lex_char_classes *hint_map)
{
size_t i;
for (i= 0; i < 256 ; i++)
{
if (my_ismb1st(cs, i))
hint_map[i]= HINT_CHR_MB;
else if (my_isalpha(cs, i))
hint_map[i]= HINT_CHR_IDENT;
else if (my_isdigit(cs, i))
hint_map[i]= HINT_CHR_DIGIT;
else if (my_isspace(cs, i))
{
DBUG_ASSERT(!my_ismb1st(cs, i));
hint_map[i]= HINT_CHR_SPACE;
}
else
hint_map[i]= HINT_CHR_CHAR;
}
hint_map[(uchar) '*']= HINT_CHR_ASTERISK;
hint_map[(uchar) '@']= HINT_CHR_AT;
hint_map[(uchar) '`']= HINT_CHR_BACKQUOTE;
hint_map[(uchar) '"']= HINT_CHR_DOUBLEQUOTE;
hint_map[(uchar) '_']= HINT_CHR_IDENT;
hint_map[(uchar) '$']= HINT_CHR_IDENT;
hint_map[(uchar) '/']= HINT_CHR_SLASH;
hint_map[(uchar) '\n']= HINT_CHR_NL;
}
my_bool init_state_maps(charset_info_st *cs)
{
uint i;
uchar *ident_map;
enum my_lex_states *state_map= NULL;
lex_state_maps_st *lex_state_maps=
(lex_state_maps_st *) my_once_alloc(sizeof(lex_state_maps_st), MYF(MY_WME));
if (lex_state_maps == NULL)
return TRUE; // OOM
cs->state_maps= lex_state_maps;
state_map= lex_state_maps->main_map;
if (!(cs->ident_map= ident_map= (uchar*) my_once_alloc(256, MYF(MY_WME))))
return TRUE; // OOM
hint_lex_init_maps(cs, lex_state_maps->hint_map);
/* Fill state_map with states to get a faster parser */
for (i=0; i < 256 ; i++)
{
if (my_isalpha(cs,i))
state_map[i]= MY_LEX_IDENT;
else if (my_isdigit(cs,i))
state_map[i]= MY_LEX_NUMBER_IDENT;
else if (my_ismb1st(cs, i))
/* To get whether it's a possible leading byte for a charset. */
state_map[i]= MY_LEX_IDENT;
else if (my_isspace(cs,i))
state_map[i]= MY_LEX_SKIP;
else
state_map[i]= MY_LEX_CHAR;
}
state_map[(uchar)'_']=state_map[(uchar)'$']= MY_LEX_IDENT;
state_map[(uchar)'\'']= MY_LEX_STRING;
state_map[(uchar)'.']= MY_LEX_REAL_OR_POINT;
state_map[(uchar)'>']=state_map[(uchar)'=']=state_map[(uchar)'!']= MY_LEX_CMP_OP;
state_map[(uchar)'<']= MY_LEX_LONG_CMP_OP;
state_map[(uchar)'&']=state_map[(uchar)'|']= MY_LEX_BOOL;
state_map[(uchar)'#']= MY_LEX_COMMENT;
state_map[(uchar)';']= MY_LEX_SEMICOLON;
state_map[(uchar)':']= MY_LEX_SET_VAR;
state_map[0]= MY_LEX_EOL;
state_map[(uchar)'\\']= MY_LEX_ESCAPE;
state_map[(uchar)'/']= MY_LEX_LONG_COMMENT;
state_map[(uchar)'*']= MY_LEX_END_LONG_COMMENT;
state_map[(uchar)'@']= MY_LEX_USER_END;
state_map[(uchar) '`']= MY_LEX_USER_VARIABLE_DELIMITER;
state_map[(uchar)'"']= MY_LEX_STRING_OR_DELIMITER;
/*
Create a second map to make it faster to find identifiers
*/
for (i=0; i < 256 ; i++)
{
ident_map[i]= (uchar) (state_map[i] == MY_LEX_IDENT ||
state_map[i] == MY_LEX_NUMBER_IDENT);
}
/* Special handling of hex and binary strings */
state_map[(uchar)'x']= state_map[(uchar)'X']= MY_LEX_IDENT_OR_HEX;
state_map[(uchar)'b']= state_map[(uchar)'B']= MY_LEX_IDENT_OR_BIN;
state_map[(uchar)'n']= state_map[(uchar)'N']= MY_LEX_IDENT_OR_NCHAR;
return FALSE;
}
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