/*
 * Copyright 2001-2014, Axel Dörfler, axeld@pinc-software.de.
 * Copyright 2010, Clemens Zeidler <haiku@clemens-zeidler.de>
 * Copyright 2011, Ingo Weinhold, ingo_weinhold@gmx.de.
 * This file may be used under the terms of the MIT License.
 */
#ifndef _FILE_SYSTEMS_QUERY_PARSER_UTILS_H
#define _FILE_SYSTEMS_QUERY_PARSER_UTILS_H


#include <sys/cdefs.h>

#ifdef FS_SHELL
#       include <new>

#       include "fssh_api_wrapper.h"
#       include "fssh_auto_deleter.h"
#else
#       include <SupportDefs.h>
#endif  // !FS_SHELL


namespace QueryParser {


enum match {
        NO_MATCH = 0,
        MATCH_OK = 1,

        MATCH_BAD_PATTERN = -2,
        MATCH_INVALID_CHARACTER
};

// return values from isValidPattern()
enum {
        PATTERN_INVALID_ESCAPE = -3,
        PATTERN_INVALID_RANGE,
        PATTERN_INVALID_SET
};


__BEGIN_DECLS


void            skipWhitespace(const char** expr, int32 skip = 0);
void            skipWhitespaceReverse(const char** expr, const char* stop);
int                     compareKeys(uint32 type, const void* key1, size_t length1,
                                const void* key2, size_t length2);
uint32          utf8ToUnicode(const char** string);
int32           getFirstPatternSymbol(const char* string);
status_t        isValidPattern(const char* pattern);
status_t        matchString(const char* pattern, const char* string);


__END_DECLS


static inline bool
isPattern(char* string)
{
        return getFirstPatternSymbol(string) >= 0 ? true : false;
}


}       // namespace QueryParser


#endif  // _FILE_SYSTEMS_QUERY_PARSER_UTILS_H