CharacterToUnicodeMap class: Difference between revisions

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A <var>CharacterToUnicodeMap</var> object contains a mapping of EBCDIC or ASCII (single-byte), characters to <var>Unicode</var> double-byte characters.
A <var>CharacterToUnicodeMap</var> object contains a mapping of single-byte code points to Unicode characters. The single-byte characters are presumably EBCDIC or ASCII, though the class does not explicitly require this &mdash; it simply maps code points in some character set to Unicode.
Each character in an In string argument is associated with, or mapped to, an individual character
 
from an Out string argument.
The <var>CharacterToUnicodeMap</var> class provides programmers with a facility for creating or copying
The Out string may be supplemented with instances of a pad character
codepages that are not currently available in the current <var class="product">Sirius Mods</var> version.
to ensure a one-to-one mapping with the In characters.
Besides methods for creating and modifying your own codepage, the class also has
methods for dynamically invoking one of
<var>CharacterToUnicodeMap</var> includes a constructor, copy methods, and an update method
the <var class="product">Sirius Mods</var> codepages supported at your site.
for modifying the map. The [[List of CharacterToUnicodeMap methods|"List of CharacterToUnicodeMap methods"]] shows all the class methods.
 
You can use the <var>String</var> class <var>[[CharacterToUnicode (String function)|CharacterToUnicode]]</var> function
which returns the mapped Unicode characters for its string method object.


The <var>CharacterToUnicodeMap</var> class is new as of version 8.0 of the <var class="product">Sirius Mods</var>.
The <var>CharacterToUnicodeMap</var> class is new as of version 8.0 of the <var class="product">Sirius Mods</var>.
==Example==                                                                                     
The following request generates a basic ASCII to Unicode codepage, then converts
the ASCII '01234' equivalent hex characters to Unicode. If you
attempt to extract a translation of a code point not in the mapping, say an ASCII code point with the high order bit on like X'80', you get a <var>[[CharacterTranslationException class|CharacterTranslationException]]</var> exception:
<p class="code">begin
%i    is float
%l    is longstring
%u    is unicode
%tr  is object characterToUnicodeMap
for %i from 0 to 127
  %l = %l with %i:integerToBinary(1)
  %u = %u:unicodeWith(%i:integerToBinary(2):utf16ToUnicode)
end for
%tr = new(in=%l, out=%u)
printText {'3031323334':x:characterToUnicode(%tr)}
end </p>
The output of the above request is:
<p class="output">01234</p>
===Further examples===
See the [[NewFromEbcdicCodepage (CharacterToUnicodeMap function)#Examples|NewFromEbcdicCodepage examples]].
==List of CharacterToUnicodeMap methods==
The [[List of CharacterToUnicodeMap methods]] shows all the class methods.
[[Category:System classes]]

Latest revision as of 19:05, 20 April 2018

A CharacterToUnicodeMap object contains a mapping of single-byte code points to Unicode characters. The single-byte characters are presumably EBCDIC or ASCII, though the class does not explicitly require this — it simply maps code points in some character set to Unicode.

The CharacterToUnicodeMap class provides programmers with a facility for creating or copying codepages that are not currently available in the current Sirius Mods version. Besides methods for creating and modifying your own codepage, the class also has methods for dynamically invoking one of the Sirius Mods codepages supported at your site.

You can use the String class CharacterToUnicode function which returns the mapped Unicode characters for its string method object.

The CharacterToUnicodeMap class is new as of version 8.0 of the Sirius Mods.

Example

The following request generates a basic ASCII to Unicode codepage, then converts the ASCII '01234' equivalent hex characters to Unicode. If you attempt to extract a translation of a code point not in the mapping, say an ASCII code point with the high order bit on like X'80', you get a CharacterTranslationException exception:

begin %i is float %l is longstring %u is unicode %tr is object characterToUnicodeMap for %i from 0 to 127 %l = %l with %i:integerToBinary(1) %u = %u:unicodeWith(%i:integerToBinary(2):utf16ToUnicode) end for %tr = new(in=%l, out=%u) printText {'3031323334':x:characterToUnicode(%tr)} end

The output of the above request is:

01234

Further examples

See the NewFromEbcdicCodepage examples.

List of CharacterToUnicodeMap methods

The List of CharacterToUnicodeMap methods shows all the class methods.

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