UTF-8 Text. UTF-8 Hex. Unicode Converter - What is Unicode? How to encode Unicode format? Unicode encoding table. Why there are serveral type of UTF? As we see in the Unicode encoding table, each version of UTF requires various resources. Base64 index table. When designing applications around Unicode characters, it is sometimes required to convert between Unicode encodings or between Unicode and legacy text data. The vast majority of modern Operating Systems support Unicode to some degree, but sometimes the legacy text data from older systems need to be converted to and from Unicode.
This conversion process can be done with an ICU converter. ICU provides comprehensive character set conversion services, mapping tables, and implementations for many encodings. This includes Unicode encodings. ICU converters are available for a wide range of encoding schemes. Most of them are based on mapping table data that is handled by few generic implementations. Some encodings are implemented algorithmically in addition to or instead of using mapping tables, especially Unicode encodings.
The partly or entirely table-based encoding schemes include: All ICU converters map only single Unicode character code points to and from single codepage character code points. ICU converters do not deal directly with combining characters, bidirectional reordering, or Arabic shaping, for example.
Such processes, if required, must be handled separately. ICU converters are not designed to perform any encoding autodetection. EUC-JP, etc. For non-IBM codepages, there is typically an equivalent codepage registered with this repository.
However, the textual data format. ICU has code to determine the default codepage of the system or process. Depending on system design, setup and APIs, it may not always be possible to find a default codepage that fully works as expected. For example,. On Windows there are three encodings in use at the same time. Note that the OEM codepage is used by default for console window output. On some UNIX-type systems, non-standard names are used for encodings, or non-standard encodings are used altogether.
Although ICU supports over encodings in its standard build and many more aliases for them, it will not be able to recognize such non-standard names. Some systems do not have a notion of a system or process codepage, and may not have APIs for that. This makes sure that the internally cached default converter will be instantiated from your preferred name.
Starting in ICU 2. This default fallback codepage is used when the operating system is using a non-standard name for a default codepage, or the converter was not packaged with ICU. The feature allows ICU to run in unusual computing environments without completely failing.
Converters are cheap to create. Any data that is shared between converters of the same kind such as the mappings, the name and the properties are automatically cached and shared in memory. Codepages with encoding schemes have been given many names by various vendors and platforms over the years. Vendors have different ways specify which codepage and encoding are being used. Macintosh has a TextEncoding. Many of these names are aliases to converters within ICU.
In order to help identify which names are recognized by certain platforms, ICU provides several converter alias functions. Even though IANA specifies a list of aliases, it usually does not specify the mappings or the actual character set for the aliases. Sometimes vendors will map similar glyph variants to different Unicode code points or sometimes they will assign completely different glyphs for the same codepage code point.
This is only a warning, and the results can still be used. This UErrorCode value is just a reminder that you may not get what you expected. The above functions can help you to determine which converter you actually wanted. You can view other available options in ucnv.
By name : Converters can be created using different types of names. No distinction is made when the converter is created, as to which name is being employed. NET Framework, and modern operating systems. Unicode can be implemented by different character encodings. Copy Show ascii Separate Convert. UTF-8 code units Copy Convert. UTF code units Copy Convert.
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