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Base Library: Class ZSTRING

This library cluster has 48 classes.

An implementation of a memory compact string with the same unicode character range as the base class STRING_32 and conforming to STRING_GENERAL. ZSTRING is an alias for the actual class name EL_ZSTRING. EL_ZSTRING has many additional routines not found in STRING_32, as for example: Python like tuple substitution.

See Articles

Benchmarks ZSTRING vs STRING_32

Directory: library/base/text/zstring

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EL_ZSTRING

Usually referenced with the alias ZSTRING, this string is a memory efficient alternative to using STRING_32. When an application mainly uses characters from the ISO-8859-15 character set, the memory saving can be as much as 70%, while the execution efficiency is roughly the same as for STRING_8. For short strings the saving is much less: about 50%. ISO-8859-15 covers most Western european languages.

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codec

EL_SHARED_UTF_8_ZCODEC

Shared utf 8 zcodec

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EL_SHARED_ZCODEC_FACTORY

Shared access to frozen class EL_ZCODEC_FACTORY

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EL_SHARED_ZSTRING_CODEC

Defines codec to be used by class EL_ZSTRING for encoding characters in area

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EL_UTF_8_ZCODEC

Converts to and from UTF-8

EL_ZCODEC

Base class for Latin, Windows and UTF-8 codecs

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EL_ZCODEC_FACTORY

Factory for character codecs conforming to EL_ZCODEC

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codec/iso

EL_ISO_8859_10_ZCODEC

Codec for ISO_8859_10 automatically generated from decoder.c in VTD-XML source

EL_ISO_8859_11_ZCODEC

Codec for ISO_8859_11 automatically generated from decoder.c in VTD-XML source

EL_ISO_8859_13_ZCODEC

Codec for ISO_8859_13 automatically generated from decoder.c in VTD-XML source

EL_ISO_8859_14_ZCODEC

Codec for ISO_8859_14 automatically generated from decoder.c in VTD-XML source

EL_ISO_8859_15_ZCODEC

Codec for ISO_8859_15 automatically generated from decoder.c in VTD-XML source

EL_ISO_8859_1_ZCODEC

ISO-8859-1 zcodec

EL_ISO_8859_2_ZCODEC

Codec for ISO_8859_2 automatically generated from decoder.c in VTD-XML source

EL_ISO_8859_3_ZCODEC

Codec for ISO_8859_3 automatically generated from decoder.c in VTD-XML source

EL_ISO_8859_4_ZCODEC

Codec for ISO_8859_4 automatically generated from decoder.c in VTD-XML source

EL_ISO_8859_5_ZCODEC

Codec for ISO_8859_5 automatically generated from decoder.c in VTD-XML source

EL_ISO_8859_6_ZCODEC

Codec for ISO_8859_6 automatically generated from decoder.c in VTD-XML source

EL_ISO_8859_7_ZCODEC

Codec for ISO_8859_7 automatically generated from decoder.c in VTD-XML source

EL_ISO_8859_8_ZCODEC

Codec for ISO_8859_8 automatically generated from decoder.c in VTD-XML source

EL_ISO_8859_9_ZCODEC

Codec for ISO_8859_9 automatically generated from decoder.c in VTD-XML source

codec/windows

EL_WINDOWS_1250_ZCODEC

Codec for WINDOWS_1250 automatically generated from decoder.c in VTD-XML source

EL_WINDOWS_1251_ZCODEC

Codec for WINDOWS_1251 automatically generated from decoder.c in VTD-XML source

EL_WINDOWS_1252_ZCODEC

Codec for WINDOWS_1252 automatically generated from decoder.c in VTD-XML source

EL_WINDOWS_1253_ZCODEC

Codec for WINDOWS_1253 automatically generated from decoder.c in VTD-XML source

EL_WINDOWS_1254_ZCODEC

Codec for WINDOWS_1254 automatically generated from decoder.c in VTD-XML source

EL_WINDOWS_1255_ZCODEC

Codec for WINDOWS_1255 automatically generated from decoder.c in VTD-XML source

EL_WINDOWS_1256_ZCODEC

Codec for WINDOWS_1256 automatically generated from decoder.c in VTD-XML source

EL_WINDOWS_1257_ZCODEC

Codec for WINDOWS_1257 automatically generated from decoder.c in VTD-XML source

EL_WINDOWS_1258_ZCODEC

Codec for WINDOWS_1258 automatically generated from decoder.c in VTD-XML source

implementation

EL_APPENDABLE_ZSTRING

Appendable/Prependable aspects of EL_ZSTRING that use only 8-bit implemenation

EL_CONVERTABLE_ZSTRING

Routines to convert instance of EL_ZSTRING to another type or form

EL_MEASUREABLE_ZSTRING

Measureable aspects of EL_ZSTRING

EL_READABLE_ZSTRING

Read only interface to class EL_ZSTRING

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EL_SEARCHABLE_ZSTRING

Searchable aspects of EL_ZSTRING

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EL_TRANSFORMABLE_ZSTRING

Implementation routines to transform instance of EL_ZSTRING

EL_UNENCODED_CHARACTERS

Representation of consecutive substrings in a STRING_32 string that could not be encoded using a latin character set. The substring are held in the array

area: SPECIAL [NATURAL]

Each substring is prececded by two 32 bit characters representing the lower and upper index.

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EL_UNENCODED_CHARACTERS_IMPLEMENTATION

Implementation routines for EL_UNENCODED_CHARACTERS

EL_ZSTRING_CHARACTER_8_IMPLEMENTATION

Aspect of EL_ZSTRING as an array of 8-bit characters

EL_ZSTRING_IMPLEMENTATION

Core implementation of EL_ZSTRING using an 8 bit array to store characters encodeable by codec, and a compacted array of 32-bit arrays to encode any character not defined by the 8-bit encoding.

support

EL_STRING_8

Extensions for STRING_8

EL_UNENCODED_CHARACTERS_BUFFER

Extendable EL_UNENCODED_CHARACTERS temporary buffer

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EL_UNENCODED_CHARACTERS_INDEX

Fast lookup of code in unencoded intervals array

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EL_ZCODE_CONVERSION

For use with class EL_ZSTRING which redefines {READABLE_STRING_GENERAL}.code as z_code. A z_code is a hybrid of a Latin-x or Windows-x encoding and a UCS4 encoding. (We only refer to "latin" from here on)

Occassionaly a unicode character might clash with the range 0 .. 255 reserved for latin encodings. To get around this we set the sign bit to 1 to distinguish it. We can do this because the sign bit is unused in UCS4 unicode.

Further Information

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