diff options
Diffstat (limited to 'perform')
| -rw-r--r-- | perform/zip_perf.c | 44 |
1 files changed, 38 insertions, 6 deletions
diff --git a/perform/zip_perf.c b/perform/zip_perf.c index c124997..910afdf 100644 --- a/perform/zip_perf.c +++ b/perform/zip_perf.c @@ -27,11 +27,11 @@ #include <stdarg.h> #include <string.h> #include <errno.h> -#include <sys/types.h> -#include <sys/stat.h> #include <fcntl.h> #include <sys/time.h> #include <sys/uio.h> +#include <sys/types.h> +#include <sys/stat.h> #include <unistd.h> /* our header files */ @@ -411,6 +411,40 @@ parse_size_directive(const char *size) } static void +fill_with_random_data(Bytef *src, uLongf src_len) +{ + register int i; + struct stat buf; + + if (stat("/dev/urandom", &buf) == 0) { + int fd = open("/dev/urandom", O_RDONLY); + + printf("Using /dev/urandom for random data\n"); + + if (fd < 0) + error(strerror(errno)); + + for (;;) { + ssize_t rc = read(fd, src, src_len); + + if (rc == -1) + error(strerror(errno)); + + if (rc == src_len) + break; + + src += rc; + src_len -= rc; + } + } else { + printf("Using random() for random data\n"); + + for (i = 0; i < src_len; ++i) + src[i] = 0xff & random(); + } +} + +static void do_write_test(unsigned long file_size, unsigned long min_buf_size, unsigned long max_buf_size) { @@ -433,9 +467,7 @@ do_write_test(unsigned long file_size, unsigned long min_buf_size, compression_time = 0.0; if (random_test) - /* fill the buffer with random data */ - for (i = 0; i < src_len; ++i) - src[i] = 0xff | (1 + (int)(255.0 * rand()/(RAND_MAX + 1.0))); + fill_with_random_data(src, src_len); printf("Buffer size == "); @@ -464,7 +496,7 @@ do_write_test(unsigned long file_size, unsigned long min_buf_size, /* loop to make sure we write everything out that we want to write */ for (;;) { - int rc = write(output, s_ptr, s_len); + ssize_t rc = write(output, s_ptr, s_len); if (rc == -1) error(strerror(errno)); |