git/test-genrandom.c
Stephen Boyd c2318228ab test-genrandom: Add newline to usage string
A minor fix to place the terminal input on a new line if test-genrandom
is run with no arguments.

Signed-off-by: Stephen Boyd <bebarino@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-04-23 01:29:00 -07:00

35 lines
732 B
C

/*
* Simple random data generator used to create reproducible test files.
* This is inspired from POSIX.1-2001 implementation example for rand().
* Copyright (C) 2007 by Nicolas Pitre, licensed under the GPL version 2.
*/
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
unsigned long count, next = 0;
unsigned char *c;
if (argc < 2 || argc > 3) {
fprintf(stderr, "Usage: %s <seed_string> [<size>]\n", argv[0]);
return 1;
}
c = (unsigned char *) argv[1];
do {
next = next * 11 + *c;
} while (*c++);
count = (argc == 3) ? strtoul(argv[2], NULL, 0) : -1L;
while (count--) {
next = next * 1103515245 + 12345;
if (putchar((next >> 16) & 0xff) == EOF)
return -1;
}
return 0;
}