Inflate (String function): Difference between revisions
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{{Template:String:Inflate subtitle}} | {{Template:String:Inflate subtitle}} | ||
This function takes a result from <var>[[Deflate (String function)|Deflate]]</var> (a compressed string) and decompresses it using the "inflate" algorithm. The inflate algorithm is described as part of the deflate specification in RFC 1951. | This function takes a result from <var>[[Deflate (String function)|Deflate]]</var> (a compressed string) and decompresses it using the "inflate" algorithm. The inflate algorithm is described as part of the deflate specification in RFC 1951. | ||
==Syntax== | ==Syntax== | ||
{{Template:String:Inflate syntax}} | {{Template:String:Inflate syntax}} | ||
===Syntax terms=== | ===Syntax terms=== | ||
<table class="syntaxTable"> | <table class="syntaxTable"> | ||
| Line 11: | Line 12: | ||
<tr><th>string</th> | <tr><th>string</th> | ||
<td>The compressed string to be decompressed.</td></tr> | <td>The compressed string to be decompressed.</td></tr> | ||
<tr><th><var>Software</var></th> | |||
<td>[Introduced in Model 204 version 8.0] | |||
<p><var>Software</var> is an optional, [[Notation conventions for methods#Named parameters|name required]], parameter that is a <var>[[Boolean_enumeration#Using_Boolean_enumerations|Boolean]]</var> value that specifies whether to force the use of software decompression instead of hardware decompression.</p> | |||
<ul> | |||
<li>When <code>software=true</code>, decompression is always performed in software, even if the DFLTCC hardware instruction is available on the processor. This can be useful for diagnostic purposes or when byte-for-byte reproducibility with pre-8.0 behavior is required.</li> | |||
<li>When <code>software=false</code> (the default), hardware decompression is used automatically when DFLTCC is available (IBM z15 and above), falling back to software decompression on older processors.</li> | |||
</ul> | |||
The default value for this argument is <var>False</var>. | |||
</td></tr> | |||
</table> | </table> | ||
| Line 19: | Line 30: | ||
<dd>This exception indicates that the method object <var class="term">string</var> does not contain a valid <var>[[Deflate (String function)|Deflate]]</var> string compression output. | <dd>This exception indicates that the method object <var class="term">string</var> does not contain a valid <var>[[Deflate (String function)|Deflate]]</var> string compression output. | ||
</dl> | </dl> | ||
==Usage notes== | ==Usage notes== | ||
<ul> | <ul> | ||
<li>The <var>[[NCMPBUF parameter|NCMPBUF]]</var> parameter must be set to a | <li>The <var>[[NCMPBUF parameter|NCMPBUF]]</var> parameter must be set to a non-zero value during <var class="product">Model 204</var> initialization to allow use of the <var>Inflate</var> function; otherwise, invoking <var>Inflate</var> causes request cancellation. | ||
non-zero value during <var class="product">Model 204</var>initialization to allow | |||
use of the <var>Inflate</var> function; | |||
causes request cancellation. | |||
</ul> | </ul> | ||
| Line 33: | Line 41: | ||
%out = %temp:Inflate | %out = %temp:Inflate | ||
</p> | </p> | ||
The following example forces software decompression: | |||
<p class="code">%out = %temp:Inflate(software=true) | |||
</p> | |||
==See also== | ==See also== | ||
<ul> | <ul> | ||
<li><var>[[Deflate (String function)|Deflate]]</var> is used to compress a string using the "deflate" algorithm. | <li><var>[[Deflate (String function)|Deflate]]</var> is used to compress a string using the "deflate" algorithm. | ||
<li>Other related methods: | <li>Other related methods: | ||
<ul> | <ul> | ||
<li><var>[[Gunzip (String function)|Gunzip]]</var> | <li><var>[[Gunzip (String function)|Gunzip]]</var> | ||
Latest revision as of 13:18, 19 May 2026
Decompress a longstring with inflate (String class)
[Introduced in Sirius Mods 7.4]
This function takes a result from Deflate (a compressed string) and decompresses it using the "inflate" algorithm. The inflate algorithm is described as part of the deflate specification in RFC 1951.
Syntax
%outString = string:Inflate Throws InvalidDeflateData
Syntax terms
| %outString | The resulting decompressed string. |
|---|---|
| string | The compressed string to be decompressed. |
| Software | [Introduced in Model 204 version 8.0]
Software is an optional, name required, parameter that is a Boolean value that specifies whether to force the use of software decompression instead of hardware decompression.
The default value for this argument is False. |
Exceptions
Inflate can throw the following exception:
- InvalidDeflateData
- This exception indicates that the method object string does not contain a valid Deflate string compression output.
Usage notes
- The NCMPBUF parameter must be set to a non-zero value during Model 204 initialization to allow use of the Inflate function; otherwise, invoking Inflate causes request cancellation.
Examples
In the following example, %out is set to the original string (How much..chuck):
%temp = 'How much wood could a woodchuck chuck':deflate(fixedCode=true) %out = %temp:Inflate
The following example forces software decompression:
%out = %temp:Inflate(software=true)
See also
- Deflate is used to compress a string using the "deflate" algorithm.
- Other related methods: