INFLATE$: Difference between revisions

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(Created page with "{{DISPLAYTITLE:_INFLATE$}} The _INFLATE$ function decompresses a string compressed by the _DEFLATE$ function. {{PageSyntax}} :{{Parameter|result$}} = _INFLATE$({{Parameter|stringToDecompress$[, originalSize&]}}) {{PageDescription}} * {{Parameter|result$}} will contain the original version of {{Parameter|stringToDecompress$}}. * Optional parameter {{Parameter|originalSize&}} can be used if the original size of the uncompressed data is known befo...")
 
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b$ = {{Cl|_DEFLATE$}}(a$)
b$ = {{Cl|_DEFLATE$}}(a$)
{{Cl|PRINT}} "After using _DEFLATE$ to compress it, LEN ="; {{Cl|LEN}}(b$)
{{Cl|PRINT}} "After using _DEFLATE$ to compress it, LEN ="; {{Cl|LEN}}(b$)
{{Cl|PRINT}} {{Cl|USING}} "(compressed size is #.###% of the original)"; (({{Cl|LEN}}(b$) * 100) / {{Cl|LEN}}(a$))
{{Cl|PRINT USING}} "(compressed size is #.###% of the original)"; (({{Cl|LEN}}(b$) * 100) / {{Cl|LEN}}(a$))
c$ = {{Cl|_INFLATE$}}(b$)
c$ = {{Cl|_INFLATE$}}(b$)
PRINT "After using _INFLATE$ to decompress it, LEN ="; {{Cl|LEN}}(c$)
PRINT "After using _INFLATE$ to decompress it, LEN ="; {{Cl|LEN}}(c$)

Revision as of 21:35, 21 October 2022

The _INFLATE$ function decompresses a string compressed by the _DEFLATE$ function.


Syntax

result$ = _INFLATE$(stringToDecompress$[, originalSize&])


Description

  • result$ will contain the original version of stringToDecompress$.
  • Optional parameter originalSize& can be used if the original size of the uncompressed data is known beforehand, which makes the decompression routine run more efficiently.
    • If unspecified, decompression still works as expected, but may use more steps and need to allocate more memory internally.


Availability

  • Version 1.4 and up.


Examples

Example 1: Compressing a long string of text.

a$ = "The quick brown fox jumps over the lazy dog. "
PRINT "Original string (a$): "; a$
FOR i = 1 TO 15
    a$ = a$ + a$
NEXT
 
PRINT "After concatenating it into itself several times, LEN(a$) ="; LEN(a$)
 
b$ = _DEFLATE$(a$)
PRINT "After using _DEFLATE$ to compress it, LEN ="; LEN(b$)
PRINT USING "(compressed size is #.###% of the original)"; ((LEN(b$) * 100) / LEN(a$))
c$ = _INFLATE$(b$)
PRINT "After using _INFLATE$ to decompress it, LEN ="; LEN(c$)
 
Original string (a$): The quick brown fox jumps over the lazy dog
After concatenating it into itself several times, LEN(a$) = 1474560
After using _DEFLATE$ to compress it, LEN = 4335
(compressed size is 0.295% of the original)
After using _INFLATE$ to decompress it, LEN = 1474560

See also



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