diff options
Diffstat (limited to 'perform/zip_perf.c')
| -rw-r--r-- | perform/zip_perf.c | 45 |
1 files changed, 40 insertions, 5 deletions
diff --git a/perform/zip_perf.c b/perform/zip_perf.c index 910afdf..301a831 100644 --- a/perform/zip_perf.c +++ b/perform/zip_perf.c @@ -98,6 +98,7 @@ static const char *prog; static const char *option_prefix; static char *filename; +static int compress_percent = 0; static int compress_level = Z_DEFAULT_COMPRESSION; static int output, random_test = FALSE; static int report_once_flag; @@ -109,9 +110,23 @@ static void compress_buffer(Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen); /* commandline options : long and short form */ -static const char *s_opts = "hB:b:p:rs:0123456789"; +static const char *s_opts = "hB:b:c:p:rs:0123456789"; static struct long_options l_opts[] = { { "help", no_arg, 'h' }, + { "compressability", require_arg, 'c' }, + { "compressabilit", require_arg, 'c' }, + { "compressabili", require_arg, 'c' }, + { "compressabil", require_arg, 'c' }, + { "compressabi", require_arg, 'c' }, + { "compressab", require_arg, 'c' }, + { "compressa", require_arg, 'c' }, + { "compress", require_arg, 'c' }, + { "compres", require_arg, 'c' }, + { "compre", require_arg, 'c' }, + { "compr", require_arg, 'c' }, + { "comp", require_arg, 'c' }, + { "com", require_arg, 'c' }, + { "co", require_arg, 'c' }, { "file-size", require_arg, 's' }, { "file-siz", require_arg, 's' }, { "file-si", require_arg, 's' }, @@ -343,6 +358,8 @@ usage(void) printf(" OPTIONS\n"); printf(" -h, --help Print this usage message and exit\n"); printf(" -1...-9 Level of compression, from 1 to 9\n"); + printf(" -c P, --compressability=P Percentage of compressability of the random\n"); + printf(" data you want [default: 0]"); printf(" -s S, --file-size=S Maximum size of uncompressed file [default: 64M]\n"); printf(" -B S, --max-buffer_size=S Maximum size of buffer [default: 1M]\n"); printf(" -b S, --min-buffer_size=S Minumum size of buffer [default: 128K]\n"); @@ -351,6 +368,7 @@ usage(void) printf(" [default: no]\n"); printf("\n"); printf(" D - a directory which exists\n"); + printf(" P - a number between 0 and 100\n"); printf(" S - is a size specifier, an integer >=0 followed by a size indicator:\n"); printf("\n"); printf(" K - Kilobyte (%d)\n", ONE_KB); @@ -417,6 +435,8 @@ fill_with_random_data(Bytef *src, uLongf src_len) struct stat buf; if (stat("/dev/urandom", &buf) == 0) { + uLongf len = src_len; + Bytef *buf = src; int fd = open("/dev/urandom", O_RDONLY); printf("Using /dev/urandom for random data\n"); @@ -425,16 +445,16 @@ fill_with_random_data(Bytef *src, uLongf src_len) error(strerror(errno)); for (;;) { - ssize_t rc = read(fd, src, src_len); + ssize_t rc = read(fd, buf, src_len); if (rc == -1) error(strerror(errno)); - if (rc == src_len) + if (rc == len) break; - src += rc; - src_len -= rc; + buf += rc; + len -= rc; } } else { printf("Using random() for random data\n"); @@ -442,6 +462,12 @@ fill_with_random_data(Bytef *src, uLongf src_len) for (i = 0; i < src_len; ++i) src[i] = 0xff & random(); } + + if (compress_percent) { + unsigned long s = src_len * compress_percent / 100; + + memset(src, '\0', s); + } } static void @@ -583,6 +609,15 @@ main(int argc, char **argv) case 'b': min_buf_size = parse_size_directive(opt_arg); break; + case 'c': + compress_percent = strtol(opt_arg, NULL, 10); + + if (compress_percent < 0) + compress_percent = 0; + else if (compress_percent > 100) + compress_percent = 100; + + break; case 'p': option_prefix = opt_arg; break; |