1 2 /* spew out a thoroughly gigantic file designed so that bzip2 3 can compress it reasonably rapidly. This is to help test 4 support for large files (> 2GB) in a reasonable amount of time. 5 I suggest you use the undocumented --exponential option to 6 bzip2 when compressing the resulting file; this saves a bit of 7 time. Note: *don't* bother with --exponential when compressing 8 Real Files; it'll just waste a lot of CPU time :-) 9 (but is otherwise harmless). 10 */ 11 12 /* ------------------------------------------------------------------ 13 This file is part of bzip2/libbzip2, a program and library for 14 lossless, block-sorting data compression. 15 16 bzip2/libbzip2 version 1.0.8 of 13 July 2019 17 Copyright (C) 1996-2019 Julian Seward <jseward@acm.org> 18 19 Please read the WARNING, DISCLAIMER and PATENTS sections in the 20 README file. 21 22 This program is released under the terms of the license contained 23 in the file LICENSE. 24 ------------------------------------------------------------------ */ 25 26 27 #define _FILE_OFFSET_BITS 64 28 29 #include <stdio.h> 30 #include <stdlib.h> 31 32 /* The number of megabytes of junk to spew out (roughly) */ 33 #define MEGABYTES 5000 34 35 #define N_BUF 1000000 36 char buf[N_BUF]; 37 38 int main ( int argc, char** argv ) 39 { 40 int ii, kk, p; 41 srandom(1); 42 setbuffer ( stdout, buf, N_BUF ); 43 for (kk = 0; kk < MEGABYTES * 515; kk+=3) { 44 p = 25+random()%50; 45 for (ii = 0; ii < p; ii++) 46 printf ( "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ); 47 for (ii = 0; ii < p-1; ii++) 48 printf ( "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb" ); 49 for (ii = 0; ii < p+1; ii++) 50 printf ( "ccccccccccccccccccccccccccccccccccccc" ); 51 } 52 fflush(stdout); 53 return 0; 54 } 55