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wbemprox: Add support for evaluating string comparisons.

This commit is contained in:
Hans Leidekker 2012-07-11 14:02:16 +02:00 committed by Alexandre Julliard
parent 2c1fe7f0c8
commit bd1bdb167d
1 changed files with 50 additions and 8 deletions
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58
dlls/wbemprox/query.c
View File

@ -226,9 +226,9 @@ void destroy_view( struct view *view )
heap_free( view );
}
static BOOL eval_like( LONGLONG lval, LONGLONG rval )
static BOOL eval_like( const WCHAR *lstr, const WCHAR *rstr )
{
const WCHAR *p = (const WCHAR *)(INT_PTR)lval, *q = (const WCHAR *)(INT_PTR)rval;
const WCHAR *p = lstr, *q = rstr;
while (*p && *q)
{
@ -244,10 +244,48 @@ static BOOL eval_like( LONGLONG lval, LONGLONG rval )
return TRUE;
}
static HRESULT eval_strcmp( UINT op, const WCHAR *lstr, const WCHAR *rstr, LONGLONG *val )
{
switch (op)
{
case OP_EQ:
*val = !strcmpW( lstr, rstr );
break;
case OP_GT:
*val = strcmpW( lstr, rstr ) > 0;
break;
case OP_LT:
*val = strcmpW( lstr, rstr ) < 0;
break;
case OP_LE:
*val = strcmpW( lstr, rstr ) <= 0;
break;
case OP_GE:
*val = strcmpW( lstr, rstr ) >= 0;
break;
case OP_NE:
*val = strcmpW( lstr, rstr );
break;
case OP_LIKE:
*val = eval_like( lstr, rstr );
break;
default:
ERR("unhandled operator %u\n", op);
return WBEM_E_INVALID_QUERY;
}
return S_OK;
}
static inline BOOL is_strcmp( const struct complex_expr *expr )
{
return ((expr->left->type == EXPR_PROPVAL && expr->right->type == EXPR_SVAL) ||
(expr->left->type == EXPR_SVAL && expr->right->type == EXPR_PROPVAL));
}
static HRESULT eval_cond( const struct table *, UINT, const struct expr *, LONGLONG * );
static BOOL eval_binary( const struct table *table, UINT row, const struct complex_expr *expr,
LONGLONG *val )
static HRESULT eval_binary( const struct table *table, UINT row, const struct complex_expr *expr,
LONGLONG *val )
{
HRESULT lret, rret;
LONGLONG lval, rval;
@ -256,6 +294,13 @@ static BOOL eval_binary( const struct table *table, UINT row, const struct compl
rret = eval_cond( table, row, expr->right, &rval );
if (lret != S_OK || rret != S_OK) return WBEM_E_INVALID_QUERY;
if (is_strcmp( expr ))
{
const WCHAR *lstr = (const WCHAR *)(INT_PTR)lval;
const WCHAR *rstr = (const WCHAR *)(INT_PTR)rval;
return eval_strcmp( expr->op, lstr, rstr, val );
}
switch (expr->op)
{
case OP_EQ:
@ -282,11 +327,8 @@ static BOOL eval_binary( const struct table *table, UINT row, const struct compl
case OP_NE:
*val = (lval != rval);
break;
case OP_LIKE:
*val = eval_like( lval, rval );
break;
default:
ERR("unknown operator %u\n", expr->op);
ERR("unhandled operator %u\n", expr->op);
return WBEM_E_INVALID_QUERY;
}
return S_OK;