Codulle - L'explorateur de code sources

span style="color: #808080; font-style: italic;">/*
 * CRC32 calculation for big files : avoids loading whole file in RAM
 *
 * Author/Copyright : Olivier MATHERET
 *   matheret@free.fr  http://matheret.free.fr
 * Licenced under CeCILL2
 *
 * Based on :
 *  Reverse CRC adapted from "Reversing CRC – Theory and Practice"
 *  HU Berlin Public Report
 *  Martin Stigge, Henryk Plotz, Wolf Muller, Jens-Peter Redlich
 *
 */
 
 
    /**
    * Gives 4 bytes so that it afterwards will compute to the given crc
    *
    * This function uses the method of the multiplication with (x^N)^ -1.
    */// calculate crc except for the last 4 bytes ; this is essentially crc32 ()*/
        $crcreg = 0xffffffff ;
 
        // calculate new content bits
        // new_content = tcrcreg * CRCINV mod CRCPOLY
// reduce modulo CRCPOLY
// add CRCINV if corresponding bit of operand is set
// return new content
        $buffer = ""/* Calculates the CRC32 of the given file without loading the file in RAM at once */'rb'""

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• cp1252
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