You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
45 lines
1.3 KiB
45 lines
1.3 KiB
|
|
//***************************************************************************
|
|
//
|
|
// (c) 2000 by Microsoft Corp. All Rights Reserved.
|
|
//
|
|
// like.h
|
|
//
|
|
// a-davcoo 28-Feb-00 Implements the SQL like operation.
|
|
//
|
|
//***************************************************************************
|
|
|
|
#ifndef _LIKE_H_
|
|
#define _LIKE_H_
|
|
|
|
|
|
#include <string.h>
|
|
|
|
|
|
// The CLike class implements the SQL "like" operation. To compare test strings
|
|
// to an expression, construct an instance of the CLike class using the expression
|
|
// and an optional escape character. Then use the Match() method on that instance
|
|
// to test each string. Note, this class makes it's own copy of the expression
|
|
// used to construct it. This implementation supports the '%' and '_' wildard
|
|
// characters as well as the [] and [^] constructs for matching sets of characters
|
|
// and ranges of characters.
|
|
class CLike
|
|
{
|
|
public:
|
|
CLike (LPCWSTR expression, WCHAR escape='\0');
|
|
~CLike (void);
|
|
|
|
bool Match (LPCWSTR string);
|
|
|
|
protected:
|
|
LPWSTR m_expression;
|
|
WCHAR m_escape;
|
|
|
|
// Recursive function and helpers for performing like operation.
|
|
bool DoLike (LPCWSTR pattern, LPCWSTR string, WCHAR escape);
|
|
bool MatchSet (LPCWSTR pattern, LPCWSTR string, int &skip);
|
|
};
|
|
|
|
|
|
#endif // _LIKE_H_
|
|
|