/*
 * This file is subject to the terms and conditions defined in
 * file 'LICENSE.md', which is part of this source code package.
 */

package core

func IsWhiteSpace(ch byte) bool {
	// Table 1 white-space characters (7.2.2 Character Set)
	// spaceCharacters := string([]byte{0x00, 0x09, 0x0A, 0x0C, 0x0D, 0x20})
	if (ch == 0x00) || (ch == 0x09) || (ch == 0x0A) || (ch == 0x0C) || (ch == 0x0D) || (ch == 0x20) {
		return true
	} else {
		return false
	}
}

func IsDecimalDigit(c byte) bool {
	if c >= '0' && c <= '9' {
		return true
	} else {
		return false
	}
}

func IsOctalDigit(c byte) bool {
	if c >= '0' && c <= '7' {
		return true
	} else {
		return false
	}
}

// Regular characters that are outside the range EXCLAMATION MARK(21h)
// (!) to TILDE (7Eh) (~) should be written using the hexadecimal notation.
func IsPrintable(char byte) bool {
	if char < 0x21 || char > 0x7E {
		return false
	}
	return true
}

func IsDelimiter(char byte) bool {
	if char == '(' || char == ')' {
		return true
	}
	if char == '<' || char == '>' {
		return true
	}
	if char == '[' || char == ']' {
		return true
	}
	if char == '{' || char == '}' {
		return true
	}
	if char == '/' {
		return true
	}
	if char == '%' {
		return true
	}

	return false
}