omt 0.5.2-alpha

A set of tiny tools mostly used for game development. A Texture atlas packer, a font converter, a pakfile creator.
Documentation 
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pub struct CrcHelper {

}

impl CrcHelper {

/*
	e.g. ruby soundbank
			soundName = items[0].chomp.strip.upcase.gsub( /\W/, '_' )
			soundId = Zlib.crc32( soundName )

*/
	pub fn clean_name_from_name_upcase_underscore( name: &str ) -> String {
		let upcase_name = name.to_uppercase();
		// Ruby: .gsub( /\W\./, ' ' ) // should be 'a-zA-Z0-9_', but actual code behaves differently
		let clean_name: String = upcase_name.chars().map(|c| match c {
			'-' => '_',			// match the ruby version
			'0'..='9' => c,
			'A'..='Z' => c,
	//			'a'..='z' => c,	// already uppercase
			'!'..='@' => c,
			'['..='`' => c,
			'{'..='~' => c,
	//		0x7f => c,			// ignore DEL
			_ => '_'
		}).collect();

		clean_name
	}
	pub fn crc_from_name_upcase_underscore( name: &str ) -> u32 {
		let clean_name = CrcHelper::clean_name_from_name_upcase_underscore( name );
		println!("clean_name: {:?}", clean_name );
		const CRC32: crc::Crc<u32> = crc::Crc::<u32>::new(&crc::CRC_32_ISO_HDLC);
		let crc = CRC32.checksum( clean_name.as_bytes() );

		crc
	}
/*
	e.g. ruby packer
			name = filename.to_s
			name = name.downcase.gsub( /\W\./, ' ' )
#			puts ">>"+name+"<<"
			
			@crc = Zlib::crc32( name.downcase )
*/
	pub fn crc_from_name( name: &str ) -> u32 {
		let downcase_name = name.to_lowercase();
		// Ruby: .gsub( /\W\./, ' ' ) // should be 'a-zA-Z0-9_', but actual code behaves differently
		let clean_name: String = downcase_name.chars().map(|c| match c {
			'0'..='9' => c,
			'a'..='z' => c,
	//			'A'..='Z' => c,	// already downcase
			'!'..='@' => c,
			'['..='`' => c,
			'{'..='~' => c,
	//		0x7f => c,			// ignore DEL
			_ => ' '
		}).collect();
		const CRC32: crc::Crc<u32> = crc::Crc::<u32>::new(&crc::CRC_32_ISO_HDLC);
		let crc = CRC32.checksum( clean_name.as_bytes() );

		crc
	}
}