/* * 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 "git-compat-util.h" int cmd_main(int argc, const 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; }