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/**
Copyright (C) 1995, 1996 by Ke Jin <kejin@visigenic.com>
Enhanced for unixODBC (1999) by Peter Harvey <pharvey@codebydesign.com>
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.
**/
#include <config.h>
#include <yystmt.h>
#include <yylex.h>
#include <nncol.h>
#include <nndate.h>
#include <yyerr.h>
static int getleaftype(yystmt_t* yystmt, node_t* nd)
{
yypar_t* par;
yyattr_t* attr;
switch( nd->type )
{
case en_nt_attr:
attr = yystmt->pattr + (nd->value).iattr;
switch((nd->value).iattr)
{
case en_lines:
case en_article_num:
case en_sql_num:
case en_sql_count:
return en_nt_num;
case en_date:
case en_sql_date:
return en_nt_date;
default:
break;
}
return en_nt_qstr;
case en_nt_param:
par = yystmt->ppar + (nd->value).ipar - 1;
switch(par->type)
{
case en_nt_null:
case en_nt_num:
case en_nt_qstr:
case en_nt_date:
break;
default:
return -1;
}
return par->type;
case en_nt_num:
case en_nt_qstr:
case en_nt_date:
case en_nt_null:
return nd->type;
default:
return -1;
}
}
static int cmp_tchk(yystmt_t* yystmt, node_t* a, node_t* b)
{
int ta, tb;
ta = getleaftype( yystmt, a );
tb = getleaftype( yystmt, b );
if( ta == -1 || tb == -1 )
return -1;
if( ta == en_nt_date && tb == en_nt_qstr )
return 0;
if( ta != tb && ta != en_nt_null && tb != en_nt_null )
return -1;
return 0;
}
static int evl_like_tchk(yystmt_t* yystmt, node_t* a, node_t* b)
{
int ta, tb;
ta = getleaftype(yystmt, a);
tb = getleaftype(yystmt, b);
if( tb == en_nt_null
|| tb == en_nt_null )
return 0;
if( ta != en_nt_qstr
|| tb != en_nt_qstr )
return -1;
return 0;
}
static int srchtree_tchk(yystmt_t* yystmt, node_t* node)
/* return -1: err or syserr, 0: ok */
{
int r, s, flag = 0;
node_t* ptr;
if( ! node )
return 0;
switch( node->type )
{
case en_nt_cmpop:
return cmp_tchk(yystmt, node->left, node->right);
case en_nt_logop:
switch( (node->value).logop )
{
case en_logop_not:
return srchtree_tchk(yystmt, node->right);
case en_logop_and:
case en_logop_or:
r = srchtree_tchk(yystmt, node->left);
s = srchtree_tchk(yystmt, node->right);
if( r == -1 || s == -1 )
return -1;
return 0;
default:
abort();
break; /* just for turn off the warning */
}
break; /* just for turn off the warning */
case en_nt_isnull:
return 0;
case en_nt_between:
r = cmp_tchk(yystmt, node->left, node->right->left);
s = cmp_tchk(yystmt, node->left, node->right->right);
if( r == -1 || s == -1 )
return -1;
return 0;
case en_nt_in:
for(ptr=node->right; ptr; ptr=ptr->right)
{
r = cmp_tchk(yystmt, node->left, ptr);
if( r == -1 )
return -1;
}
return 0;
case en_nt_caselike:
case en_nt_like:
return evl_like_tchk( yystmt, node->left, node->right);
default:
abort();
break; /* turn off the warning */
}
return -1; /* just for turn off the warning */
}
int nnsql_srchtree_tchk(void* hstmt)
{
yystmt_t* yystmt = hstmt;
int r;
r = srchtree_tchk(yystmt, yystmt->srchtree);
if( r )
yystmt->errcode = TYPE_VIOLATION;
return r;
}
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