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55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
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/* spew out a thoroughly gigantic file designed so that bzip2
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can compress it reasonably rapidly. This is to help test
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support for large files (> 2GB) in a reasonable amount of time.
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I suggest you use the undocumented --exponential option to
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bzip2 when compressing the resulting file; this saves a bit of
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time. Note: *don't* bother with --exponential when compressing
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Real Files; it'll just waste a lot of CPU time :-)
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(but is otherwise harmless).
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*/
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/* ------------------------------------------------------------------
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This file is part of bzip2/libbzip2, a program and library for
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lossless, block-sorting data compression.
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bzip2/libbzip2 version 1.0.8 of 13 July 2019
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Copyright (C) 1996-2019 Julian Seward <jseward@acm.org>
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Please read the WARNING, DISCLAIMER and PATENTS sections in the
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README file.
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This program is released under the terms of the license contained
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in the file LICENSE.
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------------------------------------------------------------------ */
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#define _FILE_OFFSET_BITS 64
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#include <stdio.h>
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#include <stdlib.h>
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/* The number of megabytes of junk to spew out (roughly) */
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#define MEGABYTES 5000
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#define N_BUF 1000000
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char buf[N_BUF];
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int main ( int argc, char** argv )
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{
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int ii, kk, p;
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srandom(1);
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setbuffer ( stdout, buf, N_BUF );
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for (kk = 0; kk < MEGABYTES * 515; kk+=3) {
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p = 25+random()%50;
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for (ii = 0; ii < p; ii++)
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printf ( "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" );
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for (ii = 0; ii < p-1; ii++)
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printf ( "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb" );
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for (ii = 0; ii < p+1; ii++)
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printf ( "ccccccccccccccccccccccccccccccccccccc" );
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}
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fflush(stdout);
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return 0;
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}
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