Zabbix

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

package itemutil

​

import (

    "bytes"

    "errors"

    "fmt"

)

​

func isKeyChar(c byte, wildcard bool) bool {

    if c >= 'a' && c <= 'z' {

        return true

    }

    if c == '.' || c == '-' || c == '_' {

        return true

    }

    if c >= '0' && c <= '9' {

        return true

    }

    if c >= 'A' && c <= 'Z' {

        return true

    }

    if wildcard && c == '*' {

        return true

    }

    return false

}

​

// parseQuotedParam parses item key quoted parameter "..." and returns

// the parsed parameter (including quotes, but without whitespace outside quotes)

// and the data after the parameter (skipping also whitespace after closing quotes).

func parseQuotedParam(data []byte) (param []byte, left []byte, err error) {

    var last byte

    for i, c := range data[1:] {

        if c == '"' && last != '\\' {

            i += 2

            param = data[:i]

            for ; i < len(data) && data[i] == ' '; i++ {

            }

            left = data[i:]

            return

        }

        last = c

    }

    err = errors.New("unterminated quoted string")

    return

}

​

// parseUnquotedParam parses item key normal parameter (any combination of any characters except ',' and ']',

// including trailing whitespace) and returns the parsed parameter and the data after the parameter.