Hans Leidekker : wbemprox: Add support for evaluating query conditions.
Alexandre Julliard
julliard at winehq.org
Fri Jun 15 13:34:41 CDT 2012
Module: wine
Branch: master
Commit: 19f203c7b267f16d333a6013fa8b06b9d1e54b5e
URL: http://source.winehq.org/git/wine.git/?a=commit;h=19f203c7b267f16d333a6013fa8b06b9d1e54b5e
Author: Hans Leidekker <hans at codeweavers.com>
Date: Fri Jun 15 15:47:54 2012 +0200
wbemprox: Add support for evaluating query conditions.
---
dlls/wbemprox/query.c | 270 +++++++++++++++++++++++++++++++++++++-
dlls/wbemprox/wbemprox_private.h | 8 +
2 files changed, 273 insertions(+), 5 deletions(-)
diff --git a/dlls/wbemprox/query.c b/dlls/wbemprox/query.c
index 551cd20..eb2f332 100644
--- a/dlls/wbemprox/query.c
+++ b/dlls/wbemprox/query.c
@@ -39,15 +39,275 @@ HRESULT create_view( const struct property *proplist, const WCHAR *class,
view->proplist = proplist;
view->table = get_table( class );
view->cond = cond;
+ view->result = NULL;
+ view->count = 0;
*ret = view;
return S_OK;
}
void destroy_view( struct view *view )
{
+ heap_free( view->result );
heap_free( view );
}
+static HRESULT get_column_index( const struct table *table, const WCHAR *name, UINT *column )
+{
+ UINT i;
+ for (i = 0; i < table->num_cols; i++)
+ {
+ if (!strcmpiW( table->columns[i].name, name ))
+ {
+ *column = i;
+ return S_OK;
+ }
+ }
+ return WBEM_E_INVALID_QUERY;
+}
+
+static UINT get_column_size( const struct table *table, UINT column )
+{
+ if (table->columns[column].type & CIM_FLAG_ARRAY) return sizeof(void *);
+
+ switch (table->columns[column].type)
+ {
+ case CIM_SINT16:
+ case CIM_UINT16:
+ return sizeof(INT16);
+ case CIM_SINT32:
+ case CIM_UINT32:
+ return sizeof(INT32);
+ case CIM_DATETIME:
+ case CIM_STRING:
+ return sizeof(WCHAR *);
+ default:
+ ERR("unkown column type %u\n", table->columns[column].type);
+ break;
+ }
+ return sizeof(INT32);
+}
+
+static UINT get_column_offset( const struct table *table, UINT column )
+{
+ UINT i, offset = 0;
+ for (i = 0; i < column; i++) offset += get_column_size( table, i );
+ return offset;
+}
+
+static UINT get_row_size( const struct table *table )
+{
+ return get_column_offset( table, table->num_cols - 1 ) + get_column_size( table, table->num_cols - 1 );
+}
+
+static HRESULT get_value( const struct table *table, UINT row, UINT column, INT_PTR *val )
+{
+ UINT col_offset, row_size;
+ const BYTE *ptr;
+
+ col_offset = get_column_offset( table, column );
+ row_size = get_row_size( table );
+ ptr = table->data + row * row_size + col_offset;
+
+ if (table->columns[column].type & CIM_FLAG_ARRAY)
+ {
+ *val = (INT_PTR)*(const void **)ptr;
+ return S_OK;
+ }
+ switch (table->columns[column].type)
+ {
+ case CIM_DATETIME:
+ case CIM_STRING:
+ *val = (INT_PTR)*(const WCHAR **)ptr;
+ break;
+ case CIM_SINT16:
+ *val = *(const INT16 *)ptr;
+ break;
+ case CIM_UINT16:
+ *val = *(const UINT16 *)ptr;
+ break;
+ case CIM_SINT32:
+ *val = *(const INT32 *)ptr;
+ break;
+ case CIM_UINT32:
+ *val = *(const UINT32 *)ptr;
+ break;
+ default:
+ ERR("invalid column type %u\n", table->columns[column].type);
+ *val = 0;
+ break;
+ }
+ return S_OK;
+}
+
+static BOOL eval_like( INT_PTR lval, INT_PTR rval )
+{
+ const WCHAR *p = (const WCHAR *)lval, *q = (const WCHAR *)rval;
+
+ while (*p && *q)
+ {
+ if (*q == '%')
+ {
+ while (*q == '%') q++;
+ if (!*q) return TRUE;
+ while (*p && toupperW( p[1] ) != toupperW( q[1] )) p++;
+ if (!*p) return TRUE;
+ }
+ if (toupperW( *p++ ) != toupperW( *q++ )) return FALSE;
+ }
+ return TRUE;
+}
+
+static HRESULT eval_cond( const struct table *, UINT, const struct expr *, INT_PTR * );
+
+static BOOL eval_binary( const struct table *table, UINT row, const struct complex_expr *expr,
+ INT_PTR *val )
+{
+ HRESULT lret, rret;
+ INT_PTR lval, rval;
+
+ lret = eval_cond( table, row, expr->left, &lval );
+ rret = eval_cond( table, row, expr->right, &rval );
+ if (lret != S_OK || rret != S_OK) return WBEM_E_INVALID_QUERY;
+
+ switch (expr->op)
+ {
+ case OP_EQ:
+ *val = (lval == rval);
+ break;
+ case OP_AND:
+ *val = (lval && rval);
+ break;
+ case OP_OR:
+ *val = (lval || rval);
+ break;
+ case OP_GT:
+ *val = (lval > rval);
+ break;
+ case OP_LT:
+ *val = (lval < rval);
+ break;
+ case OP_LE:
+ *val = (lval <= rval);
+ break;
+ case OP_GE:
+ *val = (lval >= rval);
+ break;
+ case OP_NE:
+ *val = (lval != rval);
+ break;
+ case OP_LIKE:
+ *val = eval_like( lval, rval );
+ break;
+ default:
+ ERR("unknown operator %u\n", expr->op);
+ return WBEM_E_INVALID_QUERY;
+ }
+ return S_OK;
+}
+
+static HRESULT eval_unary( const struct table *table, UINT row, const struct complex_expr *expr,
+ INT_PTR *val )
+
+{
+ HRESULT hr;
+ UINT column;
+ INT_PTR lval;
+
+ hr = get_column_index( table, expr->left->u.propval->name, &column );
+ if (hr != S_OK)
+ return hr;
+
+ hr = get_value( table, row, column, &lval );
+ if (hr != S_OK)
+ return hr;
+
+ switch (expr->op)
+ {
+ case OP_ISNULL:
+ *val = !lval;
+ break;
+ case OP_NOTNULL:
+ *val = lval;
+ break;
+ default:
+ ERR("unknown operator %u\n", expr->op);
+ return WBEM_E_INVALID_QUERY;
+ }
+ return S_OK;
+}
+
+static HRESULT eval_propval( const struct table *table, UINT row, const struct property *propval,
+ INT_PTR *val )
+
+{
+ HRESULT hr;
+ UINT column;
+
+ hr = get_column_index( table, propval->name, &column );
+ if (hr != S_OK)
+ return hr;
+
+ return get_value( table, row, column, val );
+}
+
+static HRESULT eval_cond( const struct table *table, UINT row, const struct expr *cond,
+ INT_PTR *val )
+{
+ if (!cond)
+ {
+ *val = 1;
+ return S_OK;
+ }
+ switch (cond->type)
+ {
+ case EXPR_COMPLEX:
+ return eval_binary( table, row, &cond->u.expr, val );
+ case EXPR_UNARY:
+ return eval_unary( table, row, &cond->u.expr, val );
+ case EXPR_PROPVAL:
+ return eval_propval( table, row, cond->u.propval, val );
+ case EXPR_SVAL:
+ *val = (INT_PTR)cond->u.sval;
+ return S_OK;
+ case EXPR_IVAL:
+ case EXPR_BVAL:
+ *val = cond->u.ival;
+ return S_OK;
+ default:
+ ERR("invalid expression type\n");
+ break;
+ }
+ return WBEM_E_INVALID_QUERY;
+}
+
+static HRESULT execute_view( struct view *view )
+{
+ UINT i, j = 0, len;
+
+ if (!view->table || !view->table->num_rows) return S_OK;
+
+ len = min( view->table->num_rows, 16 );
+ if (!(view->result = heap_alloc( len * sizeof(UINT) ))) return E_OUTOFMEMORY;
+
+ for (i = 0; i < view->table->num_rows; i++)
+ {
+ HRESULT hr;
+ INT_PTR val = 0;
+
+ if (j >= len)
+ {
+ UINT *tmp;
+ len *= 2;
+ if (!(tmp = heap_realloc( view->result, len * sizeof(UINT) ))) return E_OUTOFMEMORY;
+ view->result = tmp;
+ }
+ if ((hr = eval_cond( view->table, i, view->cond, &val )) != S_OK) return hr;
+ if (val) view->result[j++] = i;
+ }
+ view->count = j;
+ return S_OK;
+}
+
static struct query *alloc_query(void)
{
struct query *query;
@@ -77,12 +337,12 @@ HRESULT exec_query( const WCHAR *str, IEnumWbemClassObject **result )
*result = NULL;
if (!(query = alloc_query())) return E_OUTOFMEMORY;
hr = parse_query( str, &query->view, &query->mem );
- if (hr != S_OK)
- {
- free_query( query );
- return hr;
- }
+ if (hr != S_OK) goto done;
+ hr = execute_view( query->view );
+ if (hr != S_OK) goto done;
hr = EnumWbemClassObject_create( NULL, query, (void **)result );
+
+done:
if (hr != S_OK) free_query( query );
return hr;
}
diff --git a/dlls/wbemprox/wbemprox_private.h b/dlls/wbemprox/wbemprox_private.h
index 346ed43..bb29738 100644
--- a/dlls/wbemprox/wbemprox_private.h
+++ b/dlls/wbemprox/wbemprox_private.h
@@ -93,6 +93,8 @@ struct view
const struct property *proplist;
struct table *table;
const struct expr *cond;
+ UINT *result;
+ UINT count;
};
struct query
@@ -119,6 +121,12 @@ static inline void *heap_alloc( size_t len )
return HeapAlloc( GetProcessHeap(), 0, len );
}
+static void *heap_realloc( void *mem, size_t len ) __WINE_ALLOC_SIZE(2);
+static inline void *heap_realloc( void *mem, size_t len )
+{
+ return HeapReAlloc( GetProcessHeap(), 0, mem, len );
+}
+
static inline BOOL heap_free( void *mem )
{
return HeapFree( GetProcessHeap(), 0, mem );
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