Utf16ToUnicode (String function): Difference between revisions
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{{Template:String:Utf16ToUnicode subtitle}} | {{Template:String:Utf16ToUnicode subtitle}} | ||
The <var>Utf16ToUnicode</var> [[Intrinsic classes|intrinsic]] function converts a UTF-16 <var>Longstring</var> byte stream to <var>Unicode</var>. | |||
==Syntax== | ==Syntax== | ||
{{Template:String:Utf16ToUnicode syntax}} | {{Template:String:Utf16ToUnicode syntax}} | ||
===Syntax terms=== | ===Syntax terms=== | ||
<table | <table> | ||
<tr><th>%unicode</th> | <tr><th>%unicode</th> | ||
<td>A string variable to receive the method object string translated to <var>Unicode</var>. </td></tr> | <td>A <var>Unicode</var> string variable to receive the method object <var class="term">string</var> translated to <var>Unicode</var>. </td></tr> | ||
<tr><th>string</th> | <tr><th>string</th> | ||
<td>A <var> | <td>A string that is presumed to contain a UTF-16 byte stream.</td></tr> | ||
<tr><th><var>AllowUntranslatable</var></th> | |||
<td>This argument indicates whether this function will store values into the target <var>Unicode</var> string that cannot be translated to EBCDIC. This value defaults to <var>True</var>, which means that such values are allowed. If this argument is set to <var>False</var>, a Unicode value not translatable to EBCDIC produces a [[CharacterTranslationException class|CharacterTranslationException exception]]. | |||
<p> | |||
Unless there is a compelling reason to do otherwise, it is best to use the default value of <var>True</var>.</p></td></tr> | |||
<tr><th><var>BOM</var></th> | |||
<td>This Byte Order Mark argument is <i><b>usable only by Rocket Software</b>. [[Contacting Rocket Software Technical Support|Contact Rocket Software]] if you think this argument might be of value to you.</i> | |||
<p> | |||
<var>BOM</var> is a name required parameter with a value that is a <var>Utf16Bom</var> enumeration. </p></td></tr> | |||
</table> | </table> | ||
===Exceptions=== | ===Exceptions=== | ||
<var>Utf16ToUnicode</var> can throw the following exception: | |||
<dl> | <dl> | ||
<dt>[[CharacterTranslationException]] | <dt><var>[[CharacterTranslationException_class|CharacterTranslationException]]</var> | ||
<dd>If the method encounters a translation problem, | <dd>If the method encounters a translation problem, properties of the exception object may indicate the location and type of problem. | ||
properties of the exception object may indicate the location and type of problem. | |||
</dl> | </dl> | ||
==Usage notes== | ==Usage notes== | ||
<ul> | |||
<li>The input UTF-16 stream may contain a Byte Order Mark (U+FEFF).<ul><li>If one is present, that controls the conversion from UTF-16 to <var>Unicode</var>.<li> If a Byte Order Mark is not present, the input stream is considered to be a Big Endian stream: that is, it is the same as if the stream were preceded by the two bytes X'FE' and X'FF', in that order.</ul> | |||
</ul> | |||
==Examples== | ==Examples== | ||
In the following fragment, <var>Utf16ToUnicode</var> converts a hexadecimal input to a single <var>Unicode</var> character: | |||
In the following fragment, <var>Utf16ToUnicode</var> converts a hexadecimal input to a single <var>Unicode</var> character | <p class="code">%u unicode | ||
<p class="code">%u | %u = '0032':[[X (String function)|X]]:Utf16ToUnicode | ||
%u = '0032':X: | print %u | ||
</p> | </p> | ||
The result is: | The result is: | ||
<p class="output">2 | <p class="output">2 | ||
</p> | |||
< | ==See also== | ||
[[ | <ul> | ||
[[ | <li>[[Unicode#UTF-8 and UTF-16|UTF-8 and UTF-16]] has more information about UTF-16 conversions. </li> | ||
<li>The <var>[[Utf8ToUnicode (String function)|Utf8ToUnicode]]</var> method converts a UTF-8 byte stream to <var>Unicode</var>. </li> | |||
</ul> | |||
{{Template:String:Utf16ToUnicode footer}} | |||
Latest revision as of 19:35, 13 April 2016
Convert a UTF-16 Longstring bytestream to Unicode (String class)
The Utf16ToUnicode intrinsic function converts a UTF-16 Longstring byte stream to Unicode.
Syntax
%unicode = string:Utf16ToUnicode[( [AllowUntranslatable= boolean], - [Bom= utf16BOM])] Throws CharacterTranslationException
Syntax terms
| %unicode | A Unicode string variable to receive the method object string translated to Unicode. |
|---|---|
| string | A string that is presumed to contain a UTF-16 byte stream. |
| AllowUntranslatable | This argument indicates whether this function will store values into the target Unicode string that cannot be translated to EBCDIC. This value defaults to True, which means that such values are allowed. If this argument is set to False, a Unicode value not translatable to EBCDIC produces a CharacterTranslationException exception.
Unless there is a compelling reason to do otherwise, it is best to use the default value of True. |
| BOM | This Byte Order Mark argument is usable only by Rocket Software. Contact Rocket Software if you think this argument might be of value to you.
BOM is a name required parameter with a value that is a Utf16Bom enumeration. |
Exceptions
Utf16ToUnicode can throw the following exception:
- CharacterTranslationException
- If the method encounters a translation problem, properties of the exception object may indicate the location and type of problem.
Usage notes
- The input UTF-16 stream may contain a Byte Order Mark (U+FEFF).
- If one is present, that controls the conversion from UTF-16 to Unicode.
- If a Byte Order Mark is not present, the input stream is considered to be a Big Endian stream: that is, it is the same as if the stream were preceded by the two bytes X'FE' and X'FF', in that order.
Examples
In the following fragment, Utf16ToUnicode converts a hexadecimal input to a single Unicode character:
%u unicode %u = '0032':X:Utf16ToUnicode print %u
The result is:
2
See also
- UTF-8 and UTF-16 has more information about UTF-16 conversions.
- The Utf8ToUnicode method converts a UTF-8 byte stream to Unicode.