"The code is exactly
how I would like to write code and the algorithms used are very
efficient and well-documented."
Van T. Dinh, Microsoft MVP
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Class: CCRC32
Calculate the 32-bit CRC of a file or string
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Procedure Name
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Type
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Description
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(Declarations)
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Declarations
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Declarations and private variables for the CCRC32 class
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InputFileName
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Property
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Sets the name of the input file
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ConstructCRCTable
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Private
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Fills the CRC table with precalculated values. This is more efficient than calculating CRC's each time they are needed.
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GetCRCFromFile
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Method
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Generates a CRC for the file specified in the InputFile property
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GetCRCFromString
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Method
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Generates a CRC for the string specified in the strInput parameter.
This is the Unicode version of this method. For an ASCII version, see GetCRCFromStringAscii.
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GetCRCFromStringAscii
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Method
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Generates a CRC for the string specified in the strInput parameter.
This is the ASCII version of this method. For a Unicode version, see GetStringFromCRC.
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ReadFile
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Private
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Reads the specified number of bytes from the file.
Using this function significantly increases the speed of processing files. The alternative to using a file buffer is reading a byte at a time from the file.
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UpdateCRC32
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Private
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Calculates the new CRC based on the current CRC and the byte value
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Overview of Total Visual SourceBook
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